CN114455530A - Hand-held type liquid ration adds device - Google Patents
Hand-held type liquid ration adds device Download PDFInfo
- Publication number
- CN114455530A CN114455530A CN202210037110.XA CN202210037110A CN114455530A CN 114455530 A CN114455530 A CN 114455530A CN 202210037110 A CN202210037110 A CN 202210037110A CN 114455530 A CN114455530 A CN 114455530A
- Authority
- CN
- China
- Prior art keywords
- piston
- oil
- pipe
- hand
- dosing device
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 70
- 239000012530 fluid Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010723 turbine oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
- B67D7/0205—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants by manually operable pumping apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/38—Arrangements of hoses, e.g. operative connection with pump motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/44—Filling nozzles automatically closing
- B67D7/46—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses a handheld liquid quantitative adding device which comprises a shell and a breather pipe, wherein the shell is provided with an oil passing cavity and an air cavity, the two sides of the oil passing cavity are respectively communicated with an oil inlet pipe and an oil outlet pipe, the air cavity and the oil inlet pipe are both communicated with the breather pipe, the breather pipe is provided with an air inlet, the shell is provided with a movable piston, one end of the movable piston is arranged in the oil passing cavity, the other end of the movable piston is arranged in the air cavity, and the movable piston is movably connected with the shell to control the opening and closing of the oil outlet pipe. The quantitative adding device can quantitatively add according to adding requirements, is accurate in adding and convenient to add, and can be operated by a single person.
Description
Technical Field
The invention belongs to the field of refueling equipment, and particularly relates to a handheld liquid quantitative adding device.
Background
The main functions of the system are to add (or fill) turbine oil for lubrication and cooling to bearing oil grooves of each part of a water turbine generator set or a pump set; the expansion water tank of the open type circulating cooling water supply system of the water turbine generator set or the pump set also needs to be periodically added or supplemented with cooling water. At present, most of turbine oil adding modes of bearing oil tanks of hydropower stations, thermal power plants and large and medium-sized pump stations and the adding mode of cooling water of an open type circulating cooling water supply system still adopt manual and semi-manual operation modes formed decades ago. For example, oil tank adds the oil operation, generally need set up interim oil tank, oil pump and interim pipeline, by more than 2 people through intercom collaborative work, generally have degree of automation low, equipment transport inconvenient, operating personnel work load great, the addition is accurate inadequately, easily add and excessively cause liquid "run, emit, drip, leak" etc. and influence many drawbacks of safety, civilized production.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a handheld liquid quantitative adding device which can quantitatively add liquid according to the adding requirement, is accurate in adding and convenient to add, and can be operated by a single person.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a hand-held type liquid ration adds device which characterized in that: including casing and breather pipe, the casing is equipped with oil pocket and air chamber, and the both sides of oil pocket are communicate respectively to have into oil pipe and go out oil pipe, and the air chamber all is linked together with the breather pipe with advancing oil pipe, and the breather pipe is equipped with the air inlet, and the casing is equipped with the removal piston, and during oil pocket was located to the one end of removal piston, during the air chamber was located to the other end of removal piston, removal piston and casing swing joint were in order to control the switch that goes out oil pipe. Open through pushing down the piston when adding fluid, advance oil pipe and be connected the oil feed that realizes adding device with oil supply unit, then fluid flows out from the oil pipe behind the oil pocket, because the fluid that oil supply unit provided has certain pressure, when fluid high-speed flow through the breather pipe with advance the junction of oil pipe, produce the low pressure, inhale the air in the breather pipe, simultaneously the air can be supplemented through the air inlet in the breather pipe, air pressure and outside air atmospheric pressure in the air chamber are unanimous, the buoyancy that the piston received this moment, pressure and self gravity etc. in the air chamber reach the balance, make the piston be in the casing static assurance oil pipe oil outlet unblocked that goes out, when fluid in the tank is higher than the air inlet, atmospheric pressure in the breather pipe and the atmospheric pressure in the air chamber reduce, make the piston upwards move and seal oil pipe. Through the position of control air inlet, realize that the fixed point ration of fluid adds, can accurate interpolation, it is convenient to add, and it is effectual to add, reduces operating personnel work load, improves operation operational environment, improves the degree of automation of relevant operation maintenance operation and the precision of addition control, avoids causing liquid "running leak" and so on a great deal of drawbacks because of adding the excess, provides technical guarantee for safety, civilized production.
Furthermore, an adjustable spring is arranged between the shell and the movable piston, the adjustable spring drives the movable piston to close the oil outlet pipe, the shell is provided with a flexible limiting block, and the flexible limiting block limits the movement of the movable piston. Through the cooperation of adjustable spring and flexible spacing stopper, can make the ration add the device and be suitable for the fluid of different grade type, improve the general usefulness who adds the device. When the piston pushed down, adjustable spring was compressed, stored elastic potential energy, and the piston atress was uneven this moment, can the upward movement, and through the spacing block piston of flexible stopper for the piston atress is balanced not to seal the oil pipe, and when fluid closed the air inlet, air cavity atmospheric pressure reduced, and the piston upwards moved under the effect of spring and atmospheric pressure and forces flexible stopper deformation to remove spacingly. Because adjustable spring can adjust elasticity, can guarantee that flexible stopper can both spacing piston and make oil outlet pipe open when adopting different liquid, the piston moves upward and makes oil outlet pipe close when air inlet closed air chamber atmospheric pressure reduces. Meanwhile, the oil outlet pipe is convenient to be in a normally closed state due to the arrangement of the adjustable spring.
Further, the movable piston comprises a first piston and a second piston, the first piston is arranged in the oil passing cavity, the second piston is arranged in the air cavity, a connecting rod is arranged between the first piston and the second piston, the second piston is provided with a limiting protruding portion, and the flexible limiting block is clamped on the limiting protruding portion.
Furthermore, the shell is provided with a pressure rod, and the pressure rod is connected with the second piston. The setting of depression bar can conveniently push down second piston and first piston, convenient to use.
Furthermore, the flexible limiting block is provided with a guide surface. Through the slope type guide surface, the piston can be conveniently pressed down, and the piston which is pressed down is conveniently limited by the flexible limiting block.
Furthermore, the breather pipe is provided with scale marks. Through the setting of scale mark, can be convenient for refuel operating personnel and master the volume of adding oil, the use of the ration of being convenient for interpolation device.
Furthermore, the vent pipe is movably connected with the air inlet. Through the height of adjusting the air inlet to can correspond the height of adjusting the liquid level after adding, make to add more accurately, it is more convenient.
Further, the joint of the oil inlet pipe and the vent pipe is provided with an oil filtering sealing device for isolating liquid from entering the vent pipe. The oil filter sealing device isolates liquid but not air, so that the liquid is prevented from upwelling into the breather pipe.
Further, the housing is provided with a handle. The handle is convenient to hold.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention realizes the closing of the oil outlet pipe through the air pressure difference, realizes the accurate quantitative oil filling, simplifies the whole oil filling process, reduces the workload of operators, improves the operation working environment, improves the automation degree of related operation maintenance operation and the accuracy of additive amount control, avoids various defects of liquid leakage, leakage and the like caused by excessive addition, and provides technical guarantee for safe and civilized production.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a handheld liquid quantitative adding device according to the present invention;
FIG. 2 is a schematic view of the structure of the quantitative adding device of the present invention when it is opened;
fig. 3 is an enlarged view of a structure at a in fig. 2.
In the drawings, 1-housing; 2-a breather pipe; 3-oil passing cavity; 4-an air cavity; 5-an oil inlet pipe; 6-oil outlet pipe; 7-an air inlet; 9-an adjustable spring; 10-a flexible stopper; 11-a first piston; 12-a second piston; 13-a connecting rod; 14-a limit lug; 15-a pressure bar; 16-a guide surface; 17-graduation mark; 18-oil filter seal; 19-handle.
Detailed Description
As shown in fig. 1 to 3, the hand-held liquid quantitative adding device of the present invention comprises a housing 1 and a vent pipe 2, wherein the housing 1 is provided with an oil passing cavity 3 and an air cavity 4, two sides of the oil passing cavity 3 are respectively communicated with an oil inlet pipe 5 and an oil outlet pipe 6, the air cavity 4 and the oil inlet pipe 5 are both communicated with the vent pipe 2, the vent pipe 2 is provided with an air inlet 7, the housing 1 is provided with a movable piston, one end of the movable piston is arranged in the oil passing cavity 3, the other end of the movable piston is arranged in the air cavity 4, and the movable piston is movably connected with the housing 1 to control the opening and closing of the oil outlet pipe 6. Open through pushing down the piston when adding fluid, advance oil pipe 5 and be connected the oil feed that realizes adding the device with oil supply unit, then fluid flows out from oil pipe 6 after through oil pocket 3, because the fluid that oil supply unit provided has certain pressure, when fluid high-speed flow through breather pipe 2 and the junction of advancing oil pipe 5, produce the low pressure, inhale the air in breather pipe 2, simultaneously, air in breather pipe 2 can supply through air inlet 7, air pressure and outside air atmospheric pressure in the air chamber 4 are unanimous, the buoyancy that the piston received this moment, pressure and self gravity etc. in the air chamber 4 reach the equilibrium, make the piston be in static assurance oil pipe 6 that goes out oil and unblocked in casing 1, when fluid in the tank is higher than air inlet 7, atmospheric pressure in breather pipe 2 and the atmospheric pressure in the air chamber 4 reduce, make the piston upwards move and seal oil pipe 6. Through the position of control air inlet 7, realize that the fixed point ration of fluid adds, can accurate interpolation, it is convenient to add, adds effectually, reduces operating personnel work load, improves operation operational environment, improves the degree of automation of relevant operation maintenance operation and the precision of addition control, avoids causing liquid "running and leaking" a lot of drawbacks because of adding the excess, provides technical guarantee for safety, civilized production.
An adjustable spring 9 is arranged between the shell 1 and the movable piston, the adjustable spring 9 drives the movable piston to close the oil outlet pipe 6, the shell 1 is provided with a flexible limiting block 10, and the flexible limiting block 10 limits the movement of the movable piston. Through the cooperation of adjustable spring 9 and flexible spacing stopper, can make the ration add the device and be suitable for the fluid of different grade type, improve the general usefulness who adds the device. When the piston pushed down, adjustable spring 9 was compressed, stored elastic potential energy, and the piston atress was uneven this moment, can the upward movement, and through the spacing block piston of flexible stopper 10 for piston atress balance does not seal out oil pipe 6, and when fluid closed air inlet 7, 4 atmospheric pressure in air chamber reduced, and the piston upwards moved under the effect of spring and atmospheric pressure and forces flexible stopper 10 deformation to remove spacingly. Because adjustable spring 9 can adjust elasticity, can guarantee that flexible stopper 10 can both spacing piston and make oil pipe 6 open when adopting different liquid, the piston shifts up and makes oil pipe 6 close when air inlet 7 seals 4 atmospheric pressure in the air chamber and reduces. Meanwhile, the oil outlet pipe 6 is convenient to be in a normally closed state due to the arrangement of the adjustable spring 9.
The movable piston comprises a first piston 11 and a second piston 12, the first piston 11 is arranged in the oil passing cavity 3, the second piston 12 is arranged in the air cavity 4, a connecting rod 13 is arranged between the first piston 11 and the second piston 12, the second piston 12 is provided with a limiting protruding part 14, and the flexible limiting block 10 is clamped on the limiting protruding part 14.
The housing 1 is provided with a pressure lever 15, and the pressure lever 15 is connected with the second piston 12. The pressing rod 15 is arranged to press the second piston 12 and the first piston 11 conveniently, so that the use is convenient.
The flexible stop block 10 is provided with a guide surface 16. Through the slope type guide surface 16, the downward pressing of the piston can be facilitated, and the downward pressed piston can be limited by the flexible limiting block 10 conveniently.
The vent pipe 2 is provided with scale lines 17. Through the setting of scale mark 17, can be convenient for refuel operating personnel and master the volume of adding oil, the use of the ration of being convenient for interpolation device.
The breather pipe 2 is movably connected with the air inlet 7. Through the height of adjusting the air inlet to can correspond the height of adjusting the liquid level after adding, make to add more accurately, it is more convenient.
An oil filtering sealing device 18 is arranged at the joint of the oil inlet pipe 5 and the vent pipe 2 and used for isolating liquid from entering the vent pipe 2. Liquid is prevented from rushing up into the breather pipe 2 by the oil filter seal 18 isolating liquid but not air.
The housing 1 is provided with a handle 19. The handle 19 is provided to facilitate gripping.
The invention realizes the closing of the oil outlet pipe 6 through the air pressure difference, realizes the accurate quantitative oil filling, simplifies the whole oil filling process, reduces the workload of operators, improves the operation working environment, improves the automation degree of related operation maintenance operation and the accuracy of additive amount control, avoids various defects of liquid leakage, leakage and the like caused by excessive addition, and provides technical guarantee for safe and civilized production.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (9)
1. The utility model provides a hand-held type liquid ration adds device which characterized in that: including casing and breather pipe, the casing is equipped with oil pocket and air chamber, the both sides of oil pocket are communicate respectively to have into oil pipe and go out oil pipe, the air chamber with advance oil pipe all with the breather pipe is linked together, the breather pipe is equipped with the air inlet, the casing is equipped with the removal piston, the one end of removing the piston is located in the oil pocket, the other end of removing the piston is located in the air chamber, the removal piston with casing swing joint is with control go out oil pipe's switch.
2. A hand-held liquid dosing device according to claim 1, wherein: the casing with be equipped with adjustable spring between the removal piston, adjustable spring drive the removal piston is closed play oil pipe, the casing is equipped with flexible stopper, flexible stopper is spacing the removal of removal piston.
3. A hand-held liquid dosing device according to claim 2, wherein: the movable piston comprises a first piston and a second piston, the first piston is arranged in the oil passing cavity, the second piston is arranged in the air cavity, a connecting rod is arranged between the first piston and the second piston, the second piston is provided with a limiting protruding portion, and the flexible limiting block is clamped on the limiting protruding portion.
4. A hand-held liquid dosing device according to claim 3, wherein: the shell is provided with a pressing rod, and the pressing rod is connected with the second piston.
5. A hand-held liquid dosing device according to claim 2, wherein: the flexible limiting block is provided with a guide surface.
6. A hand-held liquid dosing device according to claim 1, wherein: the breather pipe is provided with scale marks.
7. A hand-held liquid dosing device according to claim 1, wherein: the breather pipe is movably connected with the air inlet.
8. A hand-held liquid dosing device according to claim 1, wherein: the joint of the oil inlet pipe and the vent pipe is provided with an oil filtering sealing device for isolating liquid from entering the vent pipe.
9. A hand-held liquid dosing device according to claim 1, wherein: the shell is provided with a handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210037110.XA CN114455530B (en) | 2022-01-13 | 2022-01-13 | Hand-held type liquid ration adds device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210037110.XA CN114455530B (en) | 2022-01-13 | 2022-01-13 | Hand-held type liquid ration adds device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114455530A true CN114455530A (en) | 2022-05-10 |
| CN114455530B CN114455530B (en) | 2024-07-09 |
Family
ID=81410264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210037110.XA Active CN114455530B (en) | 2022-01-13 | 2022-01-13 | Hand-held type liquid ration adds device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114455530B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR663248A (en) * | 1928-10-31 | 1929-08-19 | Improvements to installations used to deliver liquids in determined quantities | |
| DE936102C (en) * | 1941-11-05 | 1955-12-07 | Aeg | Device for maintaining the oil level in the load switch vessels of step transformers |
| FR2264967A1 (en) * | 1974-03-19 | 1975-10-17 | Moiroux Auguste | Lubrication device for a free piston engine - has pneumatic cylinder controlling oil pumping piston |
| GB0206032D0 (en) * | 2001-03-20 | 2002-04-24 | Hygiene Technik Inc | Liquid dispenser for dispensing foam |
| CN201954235U (en) * | 2011-04-21 | 2011-08-31 | 钱玉芳 | Glycerol lubricating device |
| CN202670221U (en) * | 2012-08-08 | 2013-01-16 | 黑龙江八一农垦大学 | Storage bucket for household edible vegetable oil |
| CN102985336A (en) * | 2010-09-03 | 2013-03-20 | 陈增新 | Container capable of limiting quantity of contents removed therefrom and method for removing same |
| US20150272216A1 (en) * | 2014-03-31 | 2015-10-01 | Westfield Limited (Ltd.) | Personal vaporizer with liquid supply by suction |
| CN207985748U (en) * | 2018-03-02 | 2018-10-19 | 云南浩彩新材料有限公司 | A kind of water-based ink drainage device |
| CN109668040A (en) * | 2019-01-08 | 2019-04-23 | 深圳大学 | Air pressure electronics installs lube plant additional to one kind automatically at regular time and quantity |
| CN214063902U (en) * | 2021-01-05 | 2021-08-27 | 四川中泽油田技术服务有限责任公司 | Integrated high-low pressure limiting valve |
| CN217103058U (en) * | 2022-01-13 | 2022-08-02 | 中国电建集团华东勘测设计研究院有限公司 | Hand-held type liquid ration adds device |
-
2022
- 2022-01-13 CN CN202210037110.XA patent/CN114455530B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR663248A (en) * | 1928-10-31 | 1929-08-19 | Improvements to installations used to deliver liquids in determined quantities | |
| DE936102C (en) * | 1941-11-05 | 1955-12-07 | Aeg | Device for maintaining the oil level in the load switch vessels of step transformers |
| FR2264967A1 (en) * | 1974-03-19 | 1975-10-17 | Moiroux Auguste | Lubrication device for a free piston engine - has pneumatic cylinder controlling oil pumping piston |
| GB0206032D0 (en) * | 2001-03-20 | 2002-04-24 | Hygiene Technik Inc | Liquid dispenser for dispensing foam |
| CN102985336A (en) * | 2010-09-03 | 2013-03-20 | 陈增新 | Container capable of limiting quantity of contents removed therefrom and method for removing same |
| CN201954235U (en) * | 2011-04-21 | 2011-08-31 | 钱玉芳 | Glycerol lubricating device |
| CN202670221U (en) * | 2012-08-08 | 2013-01-16 | 黑龙江八一农垦大学 | Storage bucket for household edible vegetable oil |
| US20150272216A1 (en) * | 2014-03-31 | 2015-10-01 | Westfield Limited (Ltd.) | Personal vaporizer with liquid supply by suction |
| CN207985748U (en) * | 2018-03-02 | 2018-10-19 | 云南浩彩新材料有限公司 | A kind of water-based ink drainage device |
| CN109668040A (en) * | 2019-01-08 | 2019-04-23 | 深圳大学 | Air pressure electronics installs lube plant additional to one kind automatically at regular time and quantity |
| CN214063902U (en) * | 2021-01-05 | 2021-08-27 | 四川中泽油田技术服务有限责任公司 | Integrated high-low pressure limiting valve |
| CN217103058U (en) * | 2022-01-13 | 2022-08-02 | 中国电建集团华东勘测设计研究院有限公司 | Hand-held type liquid ration adds device |
Non-Patent Citations (1)
| Title |
|---|
| 金瑶兰;龚国芳;王静;: "油液抽真空除气装置的设计及仿真分析", 机床与液压, no. 07, 15 July 2007 (2007-07-15), pages 77 - 79 * |
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| Publication number | Publication date |
|---|---|
| CN114455530B (en) | 2024-07-09 |
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