CN111894041B - Anti-seismic wear-resistant composite resin inspection well - Google Patents
Anti-seismic wear-resistant composite resin inspection well Download PDFInfo
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- CN111894041B CN111894041B CN202010883312.7A CN202010883312A CN111894041B CN 111894041 B CN111894041 B CN 111894041B CN 202010883312 A CN202010883312 A CN 202010883312A CN 111894041 B CN111894041 B CN 111894041B
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- fixedly connected
- locking
- inspection well
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/127—Manhole shafts; Other inspection or access chambers; Accessories therefor with devices for impeding fall or injuries of persons
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an anti-seismic wear-resistant composite resin inspection well which comprises an inspection well body, wherein the upper end of the inspection well body is fixedly connected with a buffering support mechanism, the upper part of the inner wall surface of the inspection well body is fixedly connected with a first connecting mechanism, the number of the first connecting mechanisms is four, a second connecting mechanism is inserted into the four first connecting mechanisms, a connecting frame is movably connected between the four second connecting mechanisms together, the upper part of the connecting frame is movably connected with a first locking mechanism in an inserting mode, the lower end of the first locking mechanism is fixedly connected with a locking column, the lower end of the locking column penetrates through the lower end of the connecting frame and is fixedly connected with a connecting disc, and the lower end of the connecting frame is fixedly connected with a second locking mechanism. According to the anti-seismic wear-resistant composite resin inspection well, the four connecting rods and the connecting frame form the anti-falling cross, so that personnel can be prevented from falling into the inspection well body, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of inspection wells, in particular to an anti-seismic wear-resistant composite resin inspection well.
Background
The inspection well is used for maintaining power supply, water drainage, pollution discharge, communication, cable television, gas pipes, street lamp lines and the like of urban underground infrastructure, and is convenient to install. It is usually installed at the intersection of pipelines, turning, where the pipe diameter or slope changes, and at certain intervals on straight pipeline sections, and is convenient for regular inspection of the attached structures. The existing inspection well is poor in wear resistance and anti-seismic performance when in use, so that the service life is short, and meanwhile, after a well cover matched with the inspection well is lost, personnel can fall into the inspection well easily, so that safety accidents are caused. Therefore, the anti-seismic wear-resistant composite resin inspection well is provided.
Disclosure of Invention
The invention mainly aims to provide an anti-seismic wear-resistant composite resin inspection well which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
an anti-seismic wear-resistant composite resin inspection well comprises an inspection well body, wherein a buffering support mechanism is fixedly connected to the upper end of the inspection well body, a first connecting mechanism is fixedly connected to the upper portion of the inner wall surface of the inspection well body, the first connecting mechanism is provided with four connecting mechanisms which are distributed in an annular array, a second connecting mechanism is inserted into the four first connecting mechanisms, a connecting frame is movably connected between the four second connecting mechanisms together, a first locking mechanism is inserted into the upper portion of the connecting frame and movably connected with the upper portion of the connecting frame, a locking column is fixedly connected to the lower end of the first locking mechanism, the lower end of the locking column penetrates through the lower end of the connecting frame and is fixedly connected with a connecting plate, a spring is sleeved on the lower portion of the outer surface of the locking column, the spring is movably connected between the upper end of the connecting plate and the lower end of the connecting frame, and the lower end of the connecting frame is fixedly connected with the second locking mechanism, the lower extreme fixed connection of connection pad is in No. two locking mechanism's upper end middle part, the left lower part of inspection shaft body and right lower part be fixedly connected with connecting pipe and No. two connecting pipes respectively.
Preferably, the buffering support mechanism comprises a bottom ring, the upper end of the bottom ring is fixedly connected with a rubber ring, the upper end of the rubber ring is fixedly connected with a top ring, the inner side of the lower end of the top ring is fixedly connected with a movable inner ring, the lower end of the bottom ring is fixedly connected with the upper end of the inspection well body, and the outer side surface of the movable inner ring is movably connected with the inner wall surface of the inspection well body.
Preferably, a coupling mechanism includes the connecting block, the spread groove has been seted up towards the one end of inspection shaft body axis to the connecting block, it has the lower part fixedly connected with auxiliary plate of the one end of spread groove to open on the connecting block, auxiliary plate's upper end fixedly connected with assists the piece, it is provided with two and distributes in the both sides of spread groove to assist the piece, with open the internal face fixed connection that has the relative other end of one end of spread groove and inspection shaft body on the connecting block.
Preferably, No. two coupling mechanism include the connecting rod, the one end fixedly connected with ejector pad of connecting rod, the other end fixedly connected with inserted block of connecting rod, the inserted block is pegged graft in the spread groove, the connecting rod joint is between two assistance pieces.
Preferably, the link includes the bottom plate, the positive piece is led to the upper end fixedly connected with of bottom plate, it is provided with four and is the annular array and distributes to lead positive piece, and just adjacent two lead positive piece and form one jointly and lead positive groove, lead positive groove and connecting rod swing joint, four lead the upper end fixedly connected with roof of positive piece, logical groove has been seted up at the middle part of bottom plate, the cross spout has been seted up at the middle part of roof.
Preferably, a locking mechanism includes the cross slide, the lower extreme middle part fixedly connected with spliced pole of cross slide, No. two ejector pads of fixedly connected with on the surface of spliced pole, No. two ejector pads are provided with four and are the annular array and distribute, four No. two ejector pads constitute a cross structure with the cross slide coincide from top to bottom jointly, the cross slide alternates swing joint in the cross spout, No. two ejector pads are connected with an ejector pad transmission.
Preferably, No. two locking mechanism includes the locking plate, locking screw under the upper end outside fixedly connected with of locking plate, locking screw is provided with four and is annular array distribution down, four equal threaded connection in upper portion of locking screw has the locking barrel, four equal threaded connection in upper portion of locking barrel has the locking screw, four the upper end of locking screw all with the lower extreme fixed connection of bottom plate, the upper end middle part of locking plate and the lower extreme fixed connection of connection pad.
Preferably, the spring swing joint is between the upper end of connection pad and the lower extreme of bottom plate, the upper end of locking post and the lower extreme fixed connection of spliced pole, the locking post alternates swing joint with logical groove.
Compared with the prior art, the invention has the following beneficial effects:
1. the distance between the lower locking screw rod and the upper locking screw rod is adjusted by rotating the locking screw sleeve, so that the distance between the locking plate and the bottom plate is adjusted, the locking column drives the first locking mechanism to move up and down in the connecting frame, the inserting block is inserted into the connecting groove or separated from the connecting groove, the locking or unlocking effect is realized, and the four connecting rods and the connecting frame jointly form a cross capable of preventing falling or the cross is unlocked; after four connecting rods and link constitute a cross that can prevent weighing down jointly, even lose the back at the well lid that the inspection shaft body was supporting, still can prevent that personnel from falling into this internally of inspection shaft, improved the security.
2. Through setting up buffering coupling mechanism in the upper end of inspection shaft body, the effect that can play the buffering when people or car etc. on this inspection shaft body are gone up to the rubber circle 22 on the buffering coupling mechanism improves the life of this inspection shaft.
3. The wear-resistant layer is coated on the inner wall surface and the outer wall surface of the inspection well body, so that the wear resistance of the inspection well body can be improved, and the service life of the inspection well body can be prolonged.
Drawings
FIG. 1 is a cross-sectional structural view of an earthquake-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 2 is a schematic structural view of a buffering support mechanism of the shock-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 3 is a schematic structural view of a first connection mechanism of the shock-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 4 is a schematic structural view of a second connection mechanism of the shock-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 5 is a schematic structural view of a connecting frame of the shock-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 6 is a schematic structural diagram of a first locking mechanism of the shock-resistant and wear-resistant composite resin inspection well according to the invention;
FIG. 7 is a schematic structural diagram of a second locking mechanism of the shock-resistant and wear-resistant composite resin inspection well according to the present invention;
FIG. 8 is a schematic view of a part of the structure of an earthquake-resistant and wear-resistant composite resin inspection well according to the present invention.
In the figure: 1. an inspection well body; 2. a buffer support mechanism; 3. a first connecting mechanism; 4. a second connecting mechanism; 5. a connecting frame; 6. a first locking mechanism; 7. a second locking mechanism; 8. a locking post; 9. a connecting disc; 10. a spring; 11. a first connecting pipe; 12. a second connecting pipe; 21. a bottom ring; 22. a rubber ring; 23. a top ring; 24. a movable inner ring; 31. connecting blocks; 32. connecting grooves; 33. an auxiliary plate; 34. an auxiliary block; 41. a connecting rod; 42. a first push block; 43. inserting a block; 51. a base plate; 52. a guide block; 53. a top plate; 54. a through groove; 55. a guide groove; 56. a cross-shaped chute; 61. a cross slide plate; 62. connecting columns; 63. a second push block; 71. a locking plate; 72. a lower locking screw; 73. locking the threaded sleeve; 74. and locking the screw rod.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-8, an anti-seismic wear-resistant composite resin inspection well comprises an inspection well body 1, a buffer support mechanism 2 is fixedly connected to the upper end of the inspection well body 1, a first connecting mechanism 3 is fixedly connected to the upper portion of the inner wall surface of the inspection well body 1, the first connecting mechanism 3 is provided with four connecting mechanisms which are distributed in an annular array, a second connecting mechanism 4 is inserted into each of the four first connecting mechanisms 3, a connecting frame 5 is movably connected between the four second connecting mechanisms 4 together, a first locking mechanism 6 is inserted into the upper portion of the connecting frame 5 and movably connected with the upper portion of the first locking mechanism 6, a locking column 8 is fixedly connected to the lower end of the first locking mechanism 6, the lower end of the locking column 8 penetrates through the lower end of the connecting frame 5 and is fixedly connected with a connecting plate 9, a spring 10 is sleeved on the lower portion of the outer surface of the locking column 8, the spring 10 is movably connected between the upper end of the connecting plate 9 and the lower end of the connecting frame 5, the lower end of the connecting frame 5 is fixedly connected with a second locking mechanism 7, the lower end of the connecting disc 9 is fixedly connected to the middle of the upper end of the second locking mechanism 7, and the left lower part and the right lower part of the inspection well body 1 are respectively and fixedly connected with a first connecting pipe 11 and a second connecting pipe 12.
Buffering supporting mechanism 2 includes end ring 21, the upper end fixedly connected with rubber circle 22 of end ring 21, the upper end fixedly connected with apical ring 23 of rubber circle 22, the inboard fixedly connected with activity inner circle 24 of lower extreme of apical ring 23, the lower extreme of end ring 21 and the upper end fixed connection of inspection shaft body 1, the lateral surface of activity inner circle 24 and the internal face swing joint of inspection shaft body 1, when on this inspection shaft body 1 of personnel or car etc. process, rubber circle 22 can play the effect of buffering, improve the life of this inspection shaft.
No. two coupling mechanism 4 includes connecting rod 41, No. one end fixedly connected with ejector pad 42 of connecting rod 41, and the other end fixedly connected with inserted block 43 of connecting rod 41, inserted block 43 peg graft in spread groove 32, and connecting rod 41 joint is between two auxiliary block 34, and four connecting rod 41 on No. two coupling mechanism 4 constitute a cross that can prevent weighing down in inspection shaft body 1, can avoid personnel to fall into in inspection shaft body 1.
The link 5 includes bottom plate 51, and the positive piece 52 is led to the upper end fixedly connected with of bottom plate 51, leads positive piece 52 to be provided with four and be the annular array and distribute, and two adjacent lead positive piece 52 and form one jointly and lead positive groove 55, lead positive groove 55 and connecting rod 41 swing joint, four upper end fixedly connected with roofs 53 of leading positive piece 52, logical groove 54 has been seted up at the middle part of bottom plate 51, cross spout 56 has been seted up at the middle part of roof 53, can play joint support's effect.
Locking mechanism 6 includes cross slide 61, cross slide 61's lower extreme middle part fixedly connected with spliced pole 62, No. two ejector pads 63 of fixedly connected with on spliced pole 62's the surface, No. two ejector pads 63 are provided with four and are the annular array and distribute, four No. two ejector pads 63 constitute a cross structure with cross slide 61 coincidence from top to bottom jointly, cross slide 61 alternates swing joint in cross spout 56, No. two ejector pads 63 are connected with a ejector pad 42 transmission, can play the effect in inserting No. two plug-in blocks 43 on the coupling mechanism 4 in the spread groove 32 on coupling mechanism 3.
The second locking mechanism 7 comprises a locking plate 71, locking screws 72 are fixedly connected to the outer side of the upper end of the locking plate 71, the lower locking screws 72 are provided with four locking screws and distributed in an annular array, locking screw sleeves 73 are connected to the upper portions of the four lower locking screws 72 in a threaded manner, locking screw rods 74 are connected to the upper portions of the four locking screw sleeves 73 in a threaded manner, the upper ends of the four upper locking screw rods 74 are fixedly connected with the lower end of the bottom plate 51, the middle portion of the upper end of the locking plate 71 is fixedly connected with the lower end of the connecting plate 9, the distance between the lower locking screw rods 72 and the upper locking screw rods 74 is adjusted by rotating the locking screw sleeves 73, the distance between the locking plate 71 and the bottom plate 51 is adjusted, so that the locking column 8 drives the first locking mechanism 6 to move up and down in the connecting frame 5, and the locking or unlocking effect is achieved.
It should be noted that, when the present invention is used, four insertion blocks 43 are respectively clamped between two corresponding auxiliary blocks 34 from top to bottom, then, four locking screw sleeves 73 are rotated to enlarge the distance between the upper locking screw 74 and the lower locking screw 72, so that the locking plate 71 moves downwards relative to the bottom plate 51, because one end of the locking column 8 is fixedly connected with the locking plate 71 through the connecting disc 9, and the other end of the locking column 8 is connected with the connecting column 62 on the first locking mechanism 6, during the downward movement of the locking plate 71, the first locking mechanism 6 is driven to move downwards through the locking column 8, so that the first locking mechanism 6 is clamped into the connecting frame 5, and thus the four second pushing blocks 63 on the first locking mechanism 6 push the first pushing block 42, so that the four first pushing blocks 42 move outwards in the connecting frame 5, and thus the insertion blocks 43 are pushed into the connecting groove 32, the four connecting rods 41 and the connecting frame 5 form a cross which can prevent falling, so that the personnel can be prevented from falling into the inspection well body 1, the safety is improved, and when the cross is to be detached, the locking screw sleeve 73 is rotated reversely, the connecting rods 41 are pushed into the connecting frame 5, and the inserting blocks 43 are separated from the connecting grooves 32; through setting up buffering coupling mechanism 2 in the upper end of inspection shaft body 1, the effect that can play the buffering when personnel or car etc. on this inspection shaft body 1 of rubber circle 22 on buffering coupling mechanism 2 improve the life of this inspection shaft.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a wear-resisting compound resin inspection shaft of antidetonation, includes inspection shaft body (1), its characterized in that: the inspection well comprises an inspection well body (1), wherein the upper end of the inspection well body (1) is fixedly connected with a buffering supporting mechanism (2), the upper part of the inner wall surface of the inspection well body (1) is fixedly connected with a first connecting mechanism (3), the first connecting mechanism (3) is provided with four connecting mechanisms which are distributed in an annular array, four connecting mechanisms (4) are inserted into the first connecting mechanism (3), a connecting frame (5) is movably connected between the four connecting mechanisms (4) together, the upper part of the connecting frame (5) is inserted and movably connected with a first locking mechanism (6), the lower end of the first locking mechanism (6) is fixedly connected with a locking column (8), the lower end of the locking column (8) penetrates through the lower end of the connecting frame (5) and is fixedly connected with a connecting disc (9), the lower part of the outer surface of the locking column (8) is sleeved with a spring (10), and the spring (10) is movably connected between the upper end of the connecting disc (9) and the lower end of the connecting frame (5), the lower extreme fixedly connected with No. two locking mechanism (7) of link (5), the lower extreme fixed connection of connection pad (9) is in the upper end middle part of No. two locking mechanism (7), the left lower part and the right lower part of inspection shaft body (1) are fixedly connected with connecting pipe (11) and No. two connecting pipe (12) respectively.
2. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: buffer support mechanism (2) are including end ring (21), the upper end fixedly connected with rubber circle (22) of end ring (21), the upper end fixedly connected with apical ring (23) of rubber circle (22), the inboard fixedly connected with activity inner circle (24) of lower extreme of apical ring (23), the lower extreme of end ring (21) and the upper end fixed connection of inspection shaft body (1), the lateral surface of activity inner circle (24) and the internal face swing joint of inspection shaft body (1).
3. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: a coupling mechanism (3) includes connecting block (31), connecting groove (32) have been seted up towards the one end of inspection shaft body (1) axis in connecting block (31), board (33) are assisted to the lower part fixedly connected with of the one end that has connecting groove (32) on connecting block (31), assist upper end fixedly connected with of board (33) and assist block (34), assist block (34) and be provided with two and distribute in the both sides of connecting groove (32), the internal face fixed connection who has the relative other end of one end of connecting groove (32) and inspection shaft body (1) and open on connecting block (31).
4. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: no. two coupling mechanism (4) are including connecting rod (41), push block (42) of one end fixedly connected with of connecting rod (41), the other end fixedly connected with inserted block (43) of connecting rod (41), inserted block (43) are pegged graft in spread groove (32), connecting rod (41) joint is between two assistance pieces (34).
5. The anti-seismic wear-resistant composite resin inspection well according to claim 4, characterized in that: link (5) include bottom plate (51), positive piece (52) are led to the upper end fixedly connected with of bottom plate (51), lead positive piece (52) and be provided with four and be annular array distribution, and two adjacent lead positive piece (52) and form one jointly and lead positive groove (55), lead positive groove (55) and connecting rod (41) swing joint, four lead the upper end fixedly connected with roof (53) of positive piece (52), logical groove (54) have been seted up at the middle part of bottom plate (51), cross spout (56) have been seted up at the middle part of roof (53).
6. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: a locking mechanism (6) includes cross slide (61), the lower extreme middle part fixedly connected with spliced pole (62) of cross slide (61), No. two ejector pads (63) of fixedly connected with on the surface of spliced pole (62), No. two ejector pads (63) are provided with four and are the annular array and distribute, four No. two ejector pads (63) constitute a cross structure with cross slide (61) coincide mutually from top to bottom jointly, cross slide (61) alternate swing joint in cross spout (56), No. two ejector pads (63) are connected with an ejector pad (42) transmission.
7. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: no. two locking mechanical system (7) are including locking plate (71), locking screw (72) under the upper end outside fixedly connected with of locking plate (71), locking screw (72) are provided with four and are annular array and distribute down, four the equal threaded connection in upper portion of locking screw (72) has locking swivel nut (73), four the equal threaded connection in upper portion of locking swivel nut (73) has locking screw (74), four the upper end of locking screw (74) all with the lower extreme fixed connection of bottom plate (51), the upper end middle part of locking plate (71) and the lower extreme fixed connection of connection pad (9).
8. The anti-seismic wear-resistant composite resin inspection well according to claim 1, characterized in that: spring (10) swing joint is between the upper end of connection pad (9) and the lower extreme of bottom plate (51), the upper end of locking post (8) and the lower extreme fixed connection of spliced pole (62), locking post (8) alternate swing joint with logical groove (54).
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CN202010883312.7A CN111894041B (en) | 2020-08-28 | 2020-08-28 | Anti-seismic wear-resistant composite resin inspection well |
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CN202010883312.7A CN111894041B (en) | 2020-08-28 | 2020-08-28 | Anti-seismic wear-resistant composite resin inspection well |
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CN111894041B true CN111894041B (en) | 2022-04-15 |
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CN207512781U (en) * | 2017-09-16 | 2018-06-19 | 梅照付 | The safety-type inspection shaft of municipal administration |
CN208815568U (en) * | 2018-09-11 | 2019-05-03 | 宁夏宸宇建筑科技有限公司 | The prefabricated valve well of antiseepage ability of swimming |
CN210636461U (en) * | 2019-07-31 | 2020-05-29 | 开封新奥燃气有限公司 | Prevent leaking gas valve well |
WO2020128232A1 (en) * | 2018-12-21 | 2020-06-25 | Libervit | Device for blocking a passage |
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SE506993C2 (en) * | 1995-04-06 | 1998-03-09 | Persson | Arrangement with protection against falling in well |
JPH094353A (en) * | 1995-06-26 | 1997-01-07 | Tamu Tec:Kk | Vertical hole excavating device |
CN201593196U (en) * | 2009-12-31 | 2010-09-29 | 浙江双环塑胶阀门有限公司 | Rubber ring and mineshaft connecting structure |
CN201687003U (en) * | 2010-03-29 | 2010-12-29 | 齐钰强 | Novel prefabricated road well |
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CN207512781U (en) * | 2017-09-16 | 2018-06-19 | 梅照付 | The safety-type inspection shaft of municipal administration |
CN107964982A (en) * | 2017-11-15 | 2018-04-27 | 郑州国知网络技术有限公司 | Manhole mouth umbrella temporary protection device is used in a kind of municipal administration |
CN208815568U (en) * | 2018-09-11 | 2019-05-03 | 宁夏宸宇建筑科技有限公司 | The prefabricated valve well of antiseepage ability of swimming |
WO2020128232A1 (en) * | 2018-12-21 | 2020-06-25 | Libervit | Device for blocking a passage |
CN210636461U (en) * | 2019-07-31 | 2020-05-29 | 开封新奥燃气有限公司 | Prevent leaking gas valve well |
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