CN114977038A - Underground cable sealing device - Google Patents
Underground cable sealing device Download PDFInfo
- Publication number
- CN114977038A CN114977038A CN202210740732.9A CN202210740732A CN114977038A CN 114977038 A CN114977038 A CN 114977038A CN 202210740732 A CN202210740732 A CN 202210740732A CN 114977038 A CN114977038 A CN 114977038A
- Authority
- CN
- China
- Prior art keywords
- sealing
- ring
- cable
- rubber
- outer cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 107
- 230000007704 transition Effects 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005358 geomagnetic field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/10—Sealing by using sealing rings or sleeves only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a high-pressure sealing device for an underground cable, which is used for a cable with an outer layer protected by a rubber sheath, and comprises: a sealed outer cylinder having an inner cavity through which a power cable passes; the upper part of the sealing outer cylinder is provided with a pressing fixing piece; the cable locking device, the first sealing assembly, the middle transition ring and the second sealing assembly are sequentially arranged in the inner cavity of the sealing outer barrel from top to bottom; and set up in the lower part of sealed urceolus lower extreme compresses tightly the mounting, and wherein first seal assembly and second seal assembly top-down all include: the sealing device comprises an upper sealing pressing ring, a first rubber sealing O-shaped ring, a middle sealing pressing ring, a second rubber sealing O-shaped ring and a lower sealing pressing ring. The underground cable sealing device meets the requirements of geophysical underground observation, has high reliability, can realize the connection of an observation probe and a cable, has high-pressure sealing performance, can realize the functions of power supply, data transmission and control, and achieves the aim of real-time continuous observation.
Description
Technical Field
The invention relates to the field of mechanical structures and geophysical and earth observation, in particular to a cable sealing device which can be suitable for carrying out geophysical observation, power supply of underground instruments and signal transmission in a deep well environment.
Background
In geophysical and geodetic surveying, a borehole-type instrument is often used to measure or observe physical quantities such as earthquake, geomagnetism, geostationary inclination, and geostatic strain in a borehole. During observation, firstly, a hole is drilled in the part to be observed of the crust, then the observation probe unit is placed on the section of the hole to be observed, the observation unit is coupled with the hole wall by using a cement pouring mode or mechanical coupling, and the vibration, deformation or ground inclination of the crust rock and the geomagnetic field are transmitted to the observation unit. In order to achieve the purpose of real-time continuous observation, ground equipment for underground observation needs to be organically connected with an underground observation unit through a multi-core cable, so that the functions of power supply, data transmission and control are realized. Therefore, the sealing connection technology of the cable and the underground observation unit is one of important technologies for realizing the geophysical observation of the deep well.
Disclosure of Invention
The invention provides a downhole cable sealing device for overcoming the defects in the prior art.
The invention discloses a downhole cable sealing device, which is used for a cable with an outer layer protected by a rubber sheath, and comprises: the sealing outer cylinder is provided with an inner cavity, and the cable penetrates through the inner cavity; the upper pressing fixing piece is arranged at the upper end of the sealing outer cylinder; the cable locking device, the first sealing assembly, the middle transition ring and the second sealing assembly are sequentially arranged in the inner cavity of the sealing outer barrel from top to bottom; and the lower part of the lower end of the sealing outer barrel is provided with a pressing fixing part, wherein the first sealing component and the second sealing component both comprise from top to bottom: the sealing device comprises an upper sealing pressing ring, a first rubber sealing O-shaped ring, a middle sealing pressing ring, a second rubber sealing O-shaped ring and a lower sealing pressing ring.
Preferably, in the first seal assembly and the second seal assembly, the upper and lower surfaces of the first rubber seal O-ring and the second rubber seal O-ring are provided with a circle of concave part, the lower surface of the upper seal pressing ring, the upper and lower surfaces of the middle seal pressing ring and the upper surface of the lower seal pressing ring are provided with a circle of convex part, and the concave part and the convex part are positioned in the axial direction of the outer seal cylinder and correspond to each other.
Preferably, the cross-sectional shapes of the recess and the protrusion are semi-circular, so that the first rubber sealing O-ring and the second rubber sealing O-ring can be tightly matched with each other and effectively compressed.
Preferably, the upper compression fitting includes an upper compression flange and a fixing bolt.
Preferably, the cable locking device comprises a cable locking inner ring and a cable locking outer ring, and a wedge-shaped sliding surface is formed between the cable locking inner ring and the cable locking outer ring.
Preferably, a plurality of deformation joints are arranged on the inner wall surface of the cable locking inner layer ring.
Preferably, the plurality of deformation joints are uniformly distributed on the inner wall surface along the axial direction of the sealing outer cylinder.
Preferably, the lower pressing fixture is a lower pressing bolt.
The invention has the following beneficial effects:
the underground cable sealing device meets the requirements of geophysical underground observation, has high reliability, can realize the connection of an observation probe and a cable, has high-pressure sealing performance, can realize the functions of power supply, data transmission and control, and achieves the aim of real-time continuous observation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a downhole cable sealing device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described below with reference to the drawings attached to the specification. It should be noted that the embodiments mentioned in the present description are not exhaustive and do not represent the only embodiments of the present invention. The following examples are given for the purpose of clearly illustrating the inventive contents of the present patent application and are not intended to limit the embodiments thereof. It will be apparent to those skilled in the art that various changes and modifications can be made in the embodiments described above, and it is intended to cover all modifications and variations of the present invention which fall within the spirit and scope of the invention.
The invention relates to a high-pressure sealing device for an underground cable, which is used for the cable with an outer layer protected by a rubber sheath, wherein the cable is electrically connected with an observation probe in the underground. As shown in fig. 1, the high pressure sealing apparatus for a downhole cable according to the preferred embodiment of the present invention comprises: the cable sealing device comprises a sealing outer cylinder 1, an upper pressing fixing piece, a cable locking device, a first sealing assembly, an intermediate transition ring 6, a second sealing assembly and a lower pressing fixing piece 7.
The sealed outer cylinder 1 has an inner cavity through which the cable 12 passes. In a preferred embodiment, the cable locking device, the first sealing assembly, the intermediate transition ring 6 and the second sealing assembly are sequentially arranged in the inner cavity of the outer sealing barrel 1 from top to bottom and are penetrated by the cable 12. It should be noted that the cable 12 is sealed by arranging 2 sets of seal assemblies (i.e. a first seal assembly and a second seal assembly) between the cable 12 and the seal outer cylinder 1, and an intermediate transition ring 6 is installed between the 2 sets of seal assemblies.
In a preferred embodiment, the first seal assembly and the second seal assembly each comprise, from top to bottom: the sealing device comprises an upper sealing press ring 2, a first rubber sealing O-shaped ring 3a, a middle sealing press ring 4, a second rubber sealing O-shaped ring 3b and a lower sealing press ring 5. Preferably, in first seal assembly and the second seal assembly, first rubber seal O shape circle 3a reaches the upper and lower surface of second rubber seal O shape circle 3b all has a round depressed part, the lower surface of clamping ring 2 in the seal, the upper and lower surface of clamping ring 4 in the middle of sealing and the upper surface of clamping ring 5 all has a round bulge, the depressed part with the position of bulge is in sealed urceolus 1 is corresponding to each other in the axial. More preferably, the cross-sectional shapes of the recess and the protrusion are semi-circular, so that they can be tightly fitted to each other and effectively compress the O-ring. Of course, in other embodiments, the cross-sectional shapes of the recess and the protrusion may be other suitable shapes.
In addition, an upper pressing and fixing member is provided at the upper end of the outer seal cylinder 1. In the preferred embodiment, the upper hold down fixture has an upper hold down flange 10 and a mounting bolt 11. The lower pressing fixing piece 7 is arranged at the lower end of the sealing outer cylinder 1. Preferably, the lower compression fixing member 7 is a lower compression bolt.
Based on the structure of the invention, the compressing flange 10 fixed on the upper part of the sealing outer cylinder 1 applies pressure to the sealing upper press ring 2, the sealing middle press ring 4 and the sealing lower press ring 5 by screwing the threads through the lower part compressing bolt 7 on the lower part of the sealing outer cylinder 1, thereby realizing the compression of the first rubber sealing O-shaped ring 3a and the second rubber sealing O-shaped ring 3b and further achieving the purpose of sealing. Particularly, according to the invention, since the upper and lower surfaces of the first rubber sealing O-ring 3a and the second rubber sealing O-ring 3b are respectively provided with a circle of concave part, the lower surface of the sealing upper pressing ring 2, the upper and lower surfaces of the sealing intermediate pressing ring 4 and the upper surface of the sealing lower pressing ring 5 are respectively provided with a circle of convex part, and the positions of the concave part and the convex part are mutually corresponding in the axial direction of the sealing outer cylinder 1, by the specific structure, when the lower pressing bolt 7 applies pressure to the sealing upper pressing ring 2, the sealing intermediate pressing ring 4 and the sealing lower pressing ring 5 by screwing threads, the deformation amount generated by compressing the first rubber sealing O-ring 3a and the second rubber sealing O-ring 3b is relatively larger, so that the sealing performance can be further improved.
Preferably, a cable locking device is arranged on the upper part of the 2 groups of sealing assemblies. The cable locking device comprises a cable locking inner ring 8 and a cable locking outer ring 9, and a wedge-shaped sliding surface is formed between the cable locking inner ring 8 and the cable locking outer ring 9. The lower compression bolt 7 provides thrust by tightening the threads so that the cable 12 is locked by sliding through the wedge-shaped sliding surface between the cable locking inner ring 8 and the cable locking outer ring 9.
In a more preferred embodiment, a plurality of deformation joints (not shown) are provided on the inner wall surface of the cable lock inner ring 8. The deformation joints are uniformly distributed on the inner wall surface of the cable locking inner layer ring 8 along the axial direction of the sealing outer cylinder 1. In one embodiment, 4 deformation joints can be uniformly arranged on the circumference of the inner wall surface of the cable locking inner layer ring 8, namely 1 deformation joint is arranged at intervals of 90 degrees, so that the cable can be more effectively clamped.
The material of the cable locking inner layer ring 8 and the cable locking outer layer ring 9 can adopt stainless steel or copper.
As shown in fig. 1, the lower end of the outer cylinder 1 has a larger diameter than the upper end, and the lower end of the outer cylinder 1 is used for fixedly connecting with a housing (not shown) of the observation probe, thereby forming a lower space in which the cable 12 is electrically connected with the downhole observation probe. The underground cable sealing device can meet the requirements of geophysical underground observation, has higher reliability, can realize the connection of an observation probe and a cable, has high-pressure sealing performance, can realize the functions of power supply, data transmission and control, and achieves the aim of real-time continuous observation.
It will be apparent to those skilled in the art that the above embodiments are merely illustrative of the present invention and are not to be construed as limiting the present invention, and that changes and modifications to the above described embodiments may be made within the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A high-pressure sealing device for a downhole cable, which is used for a cable with an outer layer protected by a rubber sheath, comprises:
the sealing outer cylinder is provided with an inner cavity, and the cable penetrates through the inner cavity;
the upper pressing fixing piece is arranged at the upper end of the sealing outer cylinder;
the cable locking device, the first sealing assembly, the middle transition ring and the second sealing assembly are sequentially arranged in the inner cavity of the sealing outer barrel from top to bottom; and a lower pressing and fixing part arranged at the lower end of the sealing outer cylinder,
the first sealing assembly and the second sealing assembly respectively comprise from top to bottom: the sealing device comprises an upper sealing pressing ring, a first rubber sealing O-shaped ring, a middle sealing pressing ring, a second rubber sealing O-shaped ring and a lower sealing pressing ring.
2. The high pressure sealing device for the underground cable according to claim 1, wherein in the first sealing assembly and the second sealing assembly, the upper and lower surfaces of the first rubber sealing O-ring and the second rubber sealing O-ring are respectively provided with a circle of concave part, the lower surface of the sealing upper press ring, the upper and lower surfaces of the sealing intermediate press ring and the upper surface of the sealing lower press ring are respectively provided with a circle of convex part, and the positions of the concave part and the convex part are mutually corresponding in the axial direction of the sealing outer cylinder.
3. The device of claim 2, wherein the cross-sectional shapes of the recessed portion and the protruding portion are semi-circular, so that the first and second rubber seal O-rings can be tightly fitted to each other and effectively compress the first and second rubber seal O-rings.
4. The downhole wireline high pressure seal of claim 1 wherein the upper compression fitting comprises an upper compression flange and a set screw.
5. The downhole wireline high pressure seal of claim 1 wherein the cable lock comprises a cable lock inner ring and a cable lock outer ring forming a wedge slip plane therebetween.
6. The high pressure sealing device for the underground cable according to claim 5, wherein a plurality of deformation joints are arranged on the inner wall surface of the cable locking inner layer ring.
7. The high pressure sealing device for the underground cable according to claim 6, wherein the plurality of deformation joints are uniformly distributed on the inner wall surface along the axial direction of the sealing outer cylinder.
8. The downhole wireline high pressure seal of claim 1, wherein the lower compression mount is a lower compression bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210740732.9A CN114977038A (en) | 2022-06-27 | 2022-06-27 | Underground cable sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210740732.9A CN114977038A (en) | 2022-06-27 | 2022-06-27 | Underground cable sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114977038A true CN114977038A (en) | 2022-08-30 |
Family
ID=82965962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210740732.9A Pending CN114977038A (en) | 2022-06-27 | 2022-06-27 | Underground cable sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114977038A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799834A (en) * | 1996-10-21 | 1998-09-01 | Marley Pump | Telescoping column pipe assembly for fuel dispensing pumping systems |
| DE102010023993A1 (en) * | 2010-06-16 | 2011-12-22 | Pflitsch Gmbh & Co. Kg | Electrical noise absorber for electric cable, has sleeve that rests against surface of end region of intermediate connector so that gap formed between sleeve and annular element is sealed by lock washer/sealing ring |
| CN202611650U (en) * | 2012-05-21 | 2012-12-19 | 中国海洋石油总公司 | Sealing structure of oil well cable |
| CN202663080U (en) * | 2012-07-13 | 2013-01-09 | 天津市天大银泰科技有限公司 | Self-sealing device for cable in high-pressure oil well |
| CN103840307A (en) * | 2014-03-25 | 2014-06-04 | 中国工程物理研究院总体工程研究所 | Cable sealing connector used for ship in deep water environment |
| CN212231062U (en) * | 2020-06-16 | 2020-12-25 | 杭州乾景科技有限公司 | High-pressure cable sealing device |
| CN214124723U (en) * | 2020-12-09 | 2021-09-03 | 华信唐山石油装备有限公司 | Crossing type high-pressure sealing device |
-
2022
- 2022-06-27 CN CN202210740732.9A patent/CN114977038A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799834A (en) * | 1996-10-21 | 1998-09-01 | Marley Pump | Telescoping column pipe assembly for fuel dispensing pumping systems |
| DE102010023993A1 (en) * | 2010-06-16 | 2011-12-22 | Pflitsch Gmbh & Co. Kg | Electrical noise absorber for electric cable, has sleeve that rests against surface of end region of intermediate connector so that gap formed between sleeve and annular element is sealed by lock washer/sealing ring |
| CN202611650U (en) * | 2012-05-21 | 2012-12-19 | 中国海洋石油总公司 | Sealing structure of oil well cable |
| CN202663080U (en) * | 2012-07-13 | 2013-01-09 | 天津市天大银泰科技有限公司 | Self-sealing device for cable in high-pressure oil well |
| CN103840307A (en) * | 2014-03-25 | 2014-06-04 | 中国工程物理研究院总体工程研究所 | Cable sealing connector used for ship in deep water environment |
| CN212231062U (en) * | 2020-06-16 | 2020-12-25 | 杭州乾景科技有限公司 | High-pressure cable sealing device |
| CN214124723U (en) * | 2020-12-09 | 2021-09-03 | 华信唐山石油装备有限公司 | Crossing type high-pressure sealing device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220830 |
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| WD01 | Invention patent application deemed withdrawn after publication |