CN115199808A - Automatic pressure flow control valve with high liquid level control function - Google Patents
Automatic pressure flow control valve with high liquid level control function Download PDFInfo
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- CN115199808A CN115199808A CN202210803931.XA CN202210803931A CN115199808A CN 115199808 A CN115199808 A CN 115199808A CN 202210803931 A CN202210803931 A CN 202210803931A CN 115199808 A CN115199808 A CN 115199808A
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- pilot valve
- pressure
- valve
- liquid level
- taking channel
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- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 230000009471 action Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 7
- 238000005429 filling process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- 238000005520 cutting process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Float Valves (AREA)
Abstract
The invention relates to a pressure flow automatic control valve with a high liquid level control function, which comprises the pressure flow automatic control valve and also comprises: the high liquid level control pilot valve is communicated with the pressure flow automatic control valve through a pressure taking channel I and a pressure taking channel II; the pressure taking channel I is communicated to an oil inlet, and the pressure taking channel II is communicated to a main valve middle cavity of the pressure flow automatic control valve; the high liquid level control pilot valve is connected with a float valve, the float valve feeds back a liquid level signal in the oil tank to the high liquid level control pilot valve, when the liquid level in the oil tank does not reach a set height, the pressure taking channel I and the pressure taking channel II are disconnected, and the main valve of the pressure flow automatic control valve is opened to start oil filling; and when the liquid level in the oil tank reaches a set height, the pressure taking channel I is communicated with the pressure taking channel II, and the main valve of the pressure flow automatic control valve is closed to stop oiling.
Description
Technical Field
The invention belongs to the field of valves, and particularly relates to a pressure flow automatic control valve with a high liquid level control function.
Background
The automatic pressure and flow control valve (patent application number 202022995058.8) is a product patented by our company, and is a device for performing pressure upper limit control, flow dynamic regulation and emergency opening and closing control on a fuel filling port of a fuel filling pipeline. The automatic pressure-flow control valve can adjust the upper limit value and the flow of the pipeline pressure in real time according to the flowing condition of the pipeline in the oil filling process. In an emergency state, the automatic pressure and flow control valve can be controlled to be quickly closed, and is often matched with a dead man control in a control system for use. The liquid level control in the oil tank of the oil filling port mainly depends on the fact that an electro-hydraulic level sensor is matched with an electrical system to close the oil filling port or the fact that a ball float valve is matched with a high liquid level control valve to automatically close the oil filling port. The introduction of these two approaches can make the fuel filler line system more complex in composition and control, increasing manufacturing and maintenance costs. If the automatic pressure-flow control valve has the function of high liquid level control, the cost is reduced, the function integration of the oil filling process can be realized, and the operation is more convenient. On the basis of the automatic pressure-flow control valve, the high liquid level control guide valve is additionally arranged and is matched with a ball float valve arranged at the top of the oil tank for use, so that the high liquid level control function is realized.
Disclosure of Invention
The present invention is directed to solving the above problems of the prior art. A pressure-flow automatic control valve with a high liquid level control function is provided. The technical scheme of the invention is as follows:
a kind of pressure flow automatic control valve with high liquid level control function, including the pressure flow automatic control valve (1), it also includes: the high liquid level control pilot valve (2) and the ball float valve (3), wherein the high liquid level control pilot valve (2) is communicated with the pressure flow automatic control valve (1) through a pressure taking channel I (4) and a pressure taking channel II (5); the pressure taking channel I (4) is communicated to an oil inlet, and the pressure taking channel II (5) is communicated to a main valve middle cavity of the pressure flow automatic control valve (1); the high liquid level control pilot valve (2) is electrically connected with the float valve (3), the float valve (3) feeds a liquid level signal in the oil tank back to the high liquid level control pilot valve (2), when the liquid level in the oil tank does not reach a set height, the pressure taking channel I (4) and the pressure taking channel II (5) are disconnected, and the pressure flow automatic control valve (1) starts to add oil when a main valve is opened; and when the liquid level in the oil tank reaches a set height, the pressure taking channel I (4) is communicated with the pressure taking channel II (5), and the main valve of the pressure flow automatic control valve (1) is closed to stop oiling.
Furthermore, the high liquid level control pilot valve (2) comprises a pilot valve body (6), and a pilot valve core (7), a piston (8), a pilot valve inlet (9), a throttle hole (10), a pilot valve spring (11), a pilot valve outlet (12), a bevel (13) and a balance air hole (14) which are arranged in the pilot valve body (6), wherein the pilot valve core (7) is arranged at the middle position in the pilot valve body (6), the pilot valve core (7) is connected with the piston (8), and the piston (8) is connected with the pilot valve inlet (9); the throttle hole (10) is communicated with the pilot valve inlet (9), the pilot valve spring (11) is connected with the pilot valve core (7), and the pilot valve outlet (12) is connected with the pilot valve core (7).
Furthermore, when the medium pressure of the pilot valve inlet (9) is high, the medium passes through the throttling hole (10), a differential pressure is formed in front of and behind the piston (8), the pilot valve core (7) is pushed to move leftwards against the elastic force of the pilot valve spring (11), the groove (13) between the pressure taking channel I (4) and the pressure taking channel II (5) is closed, and the two channels are disconnected; when the liquid level in the oil tank reaches a set height and the ball float valve (3) is closed, the pressure difference between the pilot valve outlet (12) and the pilot valve inlet (9) is rapidly balanced through the throttle hole (10), the pilot valve core (7) returns to the initial position rightwards under the action of the pilot valve spring (11), the bevel (13) is opened, and the pressure taking channel I (4) and the pressure taking channel II (5) are communicated; the pilot valve inlet (9) is connected with the oil inlet, and the pilot valve outlet (12) is connected with the inlet of the ball float valve (3); the balancing air hole (14) is communicated with the atmosphere and is used for balancing the air pressure.
Furthermore, the high liquid level control pilot valve (2) and other control pilot valves are adjacently installed and positioned or independently installed, and when the high liquid level control pilot valve and other control pilot valves are independently installed, the pressure taking channel I (4) and the pressure taking channel II (5) adopt ferrule type pipe joints to connect and fix a pressure taking pipeline.
Furthermore, the functions of the high liquid level control pilot valve (2) and other control pilot valves are not interfered with each other, and all the functional modules can be freely combined and can also work independently.
The invention has the following advantages and beneficial effects:
the innovation of the invention is mainly as described in claims 2 and 3. The automatic pressure-flow control valve has the advantages that the function of high liquid level control is added on the basis of the original functions of oil filler pressure upper limit control, flow dynamic regulation, emergency opening and closing control and the like, the cost is reduced, the function integration of an oil filling process can be realized, and the automatic pressure-flow control valve is more convenient to operate. And the high liquid level function and other functions do not interfere with each other, can be freely combined, can also work alone, as the modularization function, can carry out the dismouting according to the in-service use needs, the flexibility is stronger.
Drawings
FIG. 1 is a schematic overall structure of a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the high level control pilot valve configuration;
FIG. 3 is a schematic structural view of a float valve;
in the figure: 1. the pressure flow automatic control valve; 2. a high level control pilot valve; 3. a float valve; 4. a pressure taking channel I; 5. a pressure taking channel II; 6. a pilot valve body; 7. a pilot valve spool; 8. a piston; 9. a pilot valve inlet; 10. an orifice; 11. a pilot valve spring; 12. an outlet of the pilot valve; 13. beveling; 14. air holes are balanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail and clearly in the following with reference to the accompanying drawings. The described embodiments are only some of the embodiments of the present invention.
The technical scheme for solving the technical problems is as follows:
as shown in fig. 1, an automatic pressure-flow control valve with a high liquid level control function mainly comprises an automatic pressure-flow control valve 1, a high liquid level control pilot valve 2 and a float valve 3, wherein the high liquid level control pilot valve 2 is communicated with the automatic pressure-flow control valve 1 through a pressure taking channel i 4 and a pressure taking channel ii 5; the pressure taking channel I4 is communicated to an oil inlet, and the pressure taking channel II 5 is communicated to a main valve middle cavity of the automatic pressure-flow control valve 1; the float valve 3 feeds back a liquid level signal in the oil tank to the high liquid level control pilot valve 2, when the liquid level in the oil tank does not reach a set height, the pressure taking channel I4 and the pressure taking channel II 5 are disconnected, and the main valve of the pressure flow automatic control valve 1 is opened to start oil filling; and when the liquid level in the oil tank reaches a set height, the pressure taking channel I4 is communicated with the pressure taking channel II 5, and the main valve of the pressure flow automatic control valve 1 is closed to stop oiling.
Preferably, the high liquid level control pilot valve 2 mainly comprises a pilot valve body 6, a pilot valve core 7, a piston 8, a pilot valve inlet 9, a throttling hole 10, a pilot valve spring 11 and a pilot valve outlet 12. The method is characterized in that: when the medium pressure of the pilot valve inlet 9 is high, the medium passes through the throttling hole 10, a pressure difference is formed between the front and the back of the piston 8, the pilot valve core 7 is pushed to move leftwards by overcoming the elastic force of the pilot valve spring 11, the groove 13 between the pressure taking channel I4 and the pressure taking channel II 5 is closed, and the two channels are disconnected; when the liquid level in the oil tank reaches a set height and the ball float valve 3 is closed, the pressure difference between the pilot valve outlet 12 and the pilot valve inlet 9 is rapidly balanced through the throttle hole 10, the pilot valve spool 7 returns to the initial position rightwards under the action of the pilot valve spring 11, the bevel 13 is opened, and the pressure taking channel I4 and the pressure taking channel II 5 are communicated; the pilot valve inlet 9 is connected with the oil inlet, and the pilot valve outlet 12 is connected with the inlet of the ball float valve 3; the balance vent 14 is open to the atmosphere for balancing the air pressure.
Preferably, the high liquid level control pilot valve 2 has no special requirement on the installation position, and can be installed and positioned adjacent to other control pilot valves or independently installed. When independently installing, get pressure passageway I4 and get pressure passageway II 5 and can adopt the cutting ferrule formula coupling, connect and fix and get the pressure pipeline.
Preferably, the functions of the high liquid level control pilot valve 2 and other control pilot valves are not interfered with each other, and the function modules can be freely combined or can work independently.
Preferably, the sealing element of the present invention may be made of rubber material or other material suitable for use as a sealing ring.
Preferably, a mode of opening a screw plug and then fixing the screw plug on the valve core of the pilot valve can be adopted, so that the direct processing of a throttling hole on the valve core of the pilot valve is avoided, the processing difficulty of the valve core of the pilot valve is reduced, and the economy during the later maintenance and replacement is improved.
The working principle of the invention is as follows:
the automatic pressure-flow control valve (with high liquid level control function) mainly comprises an automatic pressure-flow control valve, a high liquid level control pilot valve and a ball float valve. The high liquid level control pilot valve is communicated with the pressure flow automatic control valve through a pressure taking channel I and a pressure taking channel II; the pressure taking channel I is communicated to the oil inlet, and the pressure taking channel II is communicated to a main valve middle cavity of the pressure flow automatic control valve; the float valve feeds back a liquid level signal in the oil tank to the high liquid level control pilot valve, when the liquid level in the oil tank does not reach a set height, the pressure taking channel I and the pressure taking channel II are disconnected, and the main valve of the pressure flow automatic control valve is opened to start oil filling; when the liquid level in the oil tank reaches a set height, the pressure taking channel I is communicated with the pressure taking channel II, and the main valve of the pressure flow automatic control valve is closed to stop oiling. The high liquid level control pilot valve mainly comprises a pilot valve body, a pilot valve core, a piston, a pilot valve inlet, a throttling hole, a pilot valve spring and a pilot valve outlet. When the pressure of the medium at the inlet of the pilot valve is high, the medium passes through the throttling hole, and differential pressure is formed in front of and behind the piston to push the valve core of the pilot valve to overcome the elastic force of the spring of the pilot valve and move leftwards, so that the groove between the pressure taking channel I and the pressure taking channel II is closed, and the two channels are disconnected; when the liquid level in the oil tank reaches a set height and the float valve is closed, the pressure difference between the outlet of the pilot valve and the inlet of the pilot valve is rapidly balanced through the throttling hole, the valve core of the pilot valve returns to the initial position rightwards under the action of the spring of the pilot valve, and the bevel is opened to connect the pressure taking channel I and the pressure taking channel II; the inlet of the pilot valve is connected with the oil inlet, and the outlet of the pilot valve is connected with the inlet of the ball float valve; the balancing hole is communicated with the atmosphere and used for balancing the air pressure.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (5)
1. The utility model provides a take pressure flow automatic control valve of high liquid level control function, includes pressure flow automatic control valve (1), its characterized in that still includes: the high liquid level control pilot valve (2) and the ball float valve (3), wherein the high liquid level control pilot valve (2) is communicated with the pressure flow automatic control valve (1) through a pressure taking channel I (4) and a pressure taking channel II (5); the pressure taking channel I (4) is communicated to an oil inlet, and the pressure taking channel II (5) is communicated to a main valve middle cavity of the pressure flow automatic control valve (1); the high liquid level control pilot valve (2) is connected with the float valve (3), the float valve (3) feeds a liquid level signal in the oil tank back to the high liquid level control pilot valve (2), when the liquid level in the oil tank does not reach a set height, the pressure taking channel I (4) and the pressure taking channel II (5) are disconnected, and the pressure flow automatic control valve (1) starts to add oil when a main valve is opened; and when the liquid level in the oil tank reaches a set height, the pressure taking channel I (4) is communicated with the pressure taking channel II (5), and the main valve of the pressure flow automatic control valve (1) is closed to stop oiling.
2. The automatic pressure-flow control valve with the high liquid level control function according to claim 1, wherein the high liquid level control pilot valve (2) comprises a pilot valve body (6), and a pilot valve spool (7), a piston (8), a pilot valve inlet (9), a throttle hole (10), a pilot valve spring (11), a pilot valve outlet (12), a bevel (13) and a balance air hole (14) which are arranged in the pilot valve body (6), wherein the pilot valve spool (7) is arranged at the middle position in the pilot valve body (6), the pilot valve spool (7) is connected with the piston (8), and the piston (8) is connected with the pilot valve inlet (9); the throttle hole (10) is communicated with the pilot valve inlet (9), the pilot valve spring (11) is connected with the pilot valve core (7), and the pilot valve outlet (12) is connected with the pilot valve core (7).
3. The automatic pressure-flow control valve with the high liquid level control function according to claim 2, characterized in that when the medium pressure at the pilot valve inlet (9) is high, the medium passes through the throttle hole (10), a pressure difference is formed in front of and behind the piston (8), the pilot valve core (7) is pushed to move leftwards against the elastic force of the pilot valve spring (11), a groove (13) between the pressure taking channel I (4) and the pressure taking channel II (5) is closed, and the two channels are disconnected; when the liquid level in the oil tank reaches a set height and the ball float valve (3) is closed, the pressure difference between the pilot valve outlet (12) and the pilot valve inlet (9) is rapidly balanced through the throttle hole (10), the pilot valve core (7) returns to the initial position rightwards under the action of the pilot valve spring (11), the bevel (13) is opened, and the pressure taking channel I (4) and the pressure taking channel II (5) are communicated; the pilot valve inlet (9) is connected with the oil inlet, and the pilot valve outlet (12) is connected with the inlet of the floating ball valve (3); the balancing air hole (14) is communicated with the atmosphere and is used for balancing the air pressure.
4. The automatic pressure-flow control valve with the high liquid level control function according to one of claims 1 to 3, characterized in that the high liquid level control pilot valve (2) is installed and positioned adjacent to other control pilot valves or is installed independently, and when the high liquid level control pilot valve is installed independently, the pressure taking channel I (4) and the pressure taking channel II (5) adopt ferrule type pipe joints to connect and fix a pressure taking pipeline.
5. Pressure-flow automatic control valve with high liquid level control function according to one of claims 1-3, characterized in that the functions of the high liquid level control pilot valve (2) and other control pilot valves are not interfered with each other, and the function modules can be freely combined or independently operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210803931.XA CN115199808B (en) | 2022-07-07 | 2022-07-07 | Pressure flow automatic control valve with high liquid level control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210803931.XA CN115199808B (en) | 2022-07-07 | 2022-07-07 | Pressure flow automatic control valve with high liquid level control function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115199808A true CN115199808A (en) | 2022-10-18 |
| CN115199808B CN115199808B (en) | 2024-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210803931.XA Active CN115199808B (en) | 2022-07-07 | 2022-07-07 | Pressure flow automatic control valve with high liquid level control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115199808B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03125088A (en) * | 1989-10-09 | 1991-05-28 | Maezawa Ind Inc | Two-stage changeover liquid level adjusting valve |
| JPH11325305A (en) * | 1998-05-20 | 1999-11-26 | Yokota Seisakusho:Kk | Liquid level control valve gear |
| CN102644778A (en) * | 2012-02-07 | 2012-08-22 | 中国人民解放军总后勤部油料研究所 | Automatic control valve for liquid level |
| CN104406045A (en) * | 2014-11-14 | 2015-03-11 | 重庆川庆科技发展有限公司 | High-liquid-level valve for bidirectional flowing of oil tank |
| CN204459339U (en) * | 2015-02-04 | 2015-07-08 | 重庆川庆科技发展有限公司 | High liquid level (HLL) Emergeny Cutoff Valves |
| CN110406832A (en) * | 2019-08-01 | 2019-11-05 | 中国人民解放军陆军勤务学院 | A kind of filling anti-overflow control device of the built-in bottom section canned for oil tank |
| CN112112977A (en) * | 2020-10-13 | 2020-12-22 | 北京航空工程技术研究中心 | Pilot-operated type flow control valve in pipe |
| CN214331651U (en) * | 2020-12-14 | 2021-10-01 | 重庆川庆科技发展有限公司 | Built-in high liquid level valve for oil tank truck |
-
2022
- 2022-07-07 CN CN202210803931.XA patent/CN115199808B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03125088A (en) * | 1989-10-09 | 1991-05-28 | Maezawa Ind Inc | Two-stage changeover liquid level adjusting valve |
| JPH11325305A (en) * | 1998-05-20 | 1999-11-26 | Yokota Seisakusho:Kk | Liquid level control valve gear |
| CN102644778A (en) * | 2012-02-07 | 2012-08-22 | 中国人民解放军总后勤部油料研究所 | Automatic control valve for liquid level |
| CN104406045A (en) * | 2014-11-14 | 2015-03-11 | 重庆川庆科技发展有限公司 | High-liquid-level valve for bidirectional flowing of oil tank |
| CN204459339U (en) * | 2015-02-04 | 2015-07-08 | 重庆川庆科技发展有限公司 | High liquid level (HLL) Emergeny Cutoff Valves |
| CN110406832A (en) * | 2019-08-01 | 2019-11-05 | 中国人民解放军陆军勤务学院 | A kind of filling anti-overflow control device of the built-in bottom section canned for oil tank |
| CN112112977A (en) * | 2020-10-13 | 2020-12-22 | 北京航空工程技术研究中心 | Pilot-operated type flow control valve in pipe |
| CN214331651U (en) * | 2020-12-14 | 2021-10-01 | 重庆川庆科技发展有限公司 | Built-in high liquid level valve for oil tank truck |
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|---|---|
| CN115199808B (en) | 2024-06-11 |
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