CN112815122A - Novel automatic control type emergency emptying system and operation method - Google Patents
Novel automatic control type emergency emptying system and operation method Download PDFInfo
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- CN112815122A CN112815122A CN202011583293.2A CN202011583293A CN112815122A CN 112815122 A CN112815122 A CN 112815122A CN 202011583293 A CN202011583293 A CN 202011583293A CN 112815122 A CN112815122 A CN 112815122A
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- core sleeve
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
Abstract
The invention relates to a novel automatic control type emergency emptying system and an operation method. The high-pressure stainless steel valve comprises a reaction gate valve, a single-action actuator, a pilot valve assembly, a pump, a main control valve body, an overflow valve, a pressure gauge, a high-pressure stainless steel pipe, an energy accumulator and a control pipeline, wherein the reaction gate valve, the single-action actuator, the pilot valve assembly, the pump, the overflow valve, the pressure gauge, the high-pressure stainless steel pipe, the energy accumulator and the control pipeline are installed on the main control valve body, a first pressure spring, a valve rod, a valve core sleeve, a valve clack, a second pressure spring and a piston are arranged in the main control valve body, the valve core sleeve is embedded in the main control valve body, the valve rod is arranged in the valve core sleeve, the valve clack is arranged at the left end of the valve rod, the right end of the valve rod is connected with a shifting piece, the right. The invention has the advantages that: and the two-position three-way pilot valve is adopted for series control, so that the manual operation errors are reduced.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas, in particular to a novel automatic control type emergency emptying system and an operation method.
Background
High-pressure pipelines and containers in the oil and gas industry have the risks of breakage due to long service time and medium corrosion and erosion. The method may seriously threaten the safety of personnel and environmental pollution, and along with the increase of the national attention degree on safety and environmental protection, petroleum and natural gas production units have some new policies at present to guarantee safety and environmental protection. All valve manufacturers begin to research the technology of the emergency emptying system, and the emergency emptying valves with the specifications appear in the market at present, and the main purpose of the emergency emptying valves is to automatically empty media in pipelines when pressure fluctuation is large, so that the purpose of protecting the safety of upstream pipelines and equipment is achieved.
The prior state has a similar product, and the defects are as follows:
1. the high-pressure sealing device is limited by the technical problem of high-pressure sealing of the main control valve, adopts a mode of reducing control pressure, and has the advantages of complex structure, large product volume, more parts and high cost.
2. The external oil tank is large in size, high in cost and prone to leakage caused by external impact.
3. By adopting the inlet control valve, the interface can not be designed in a unified way, the integration level is not high, the number of external pipelines is large, and the number of leakage points is large.
4. The valve is opened by adopting a mode that a two-position two-way pilot valve is connected in parallel and directly relieves pressure, in the opening process of the valve, the pressure fluctuation of a pipeline is caused along with the change of the opening flow of a main valve, the pilot valve can be closed again, the emergency emptying valve is only opened by half, the safety protection effect cannot be realized, and the reliability is not high.
5. The operation is complicated, when the valve is opened, the inlet end of the pilot valve needs to be opened by the stop valve, when the pressure of the pipeline is recovered to be normal, the stop valve is manually opened to switch to a pilot valve control mode, and the risk of manual misoperation is high.
Disclosure of Invention
The invention aims to provide a novel automatic control type emergency emptying system, which overcomes the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel self-control emergency emptying system comprises a reaction gate valve, a single-action actuator, a pilot valve component, a pump, a main control valve body, an overflow valve, a pressure gauge, a high-pressure stainless steel pipe, an energy accumulator and a control pipeline, the reaction gate valve, the single-action actuator, the pilot valve component, the pump, the overflow valve, the pressure gauge, the high-pressure stainless steel pipe, the energy accumulator and the control pipeline are arranged on the main control valve body, the main control valve body is internally provided with a first pressure spring, a valve rod, a valve core sleeve, a valve clack, a second pressure spring and a piston, the valve core sleeve is embedded in the main control valve body, the valve rod is arranged in the valve core sleeve, the valve clack is arranged at the left end of the valve rod, the right end of the valve rod is connected with a shifting piece, the right end of the valve clack is connected with the piston through a fixing screw, and a first air port and a second air port are formed in the main control valve body.
Preferably, the poking piece is fixedly arranged at the right end of the valve rod through a rotating shaft.
Preferably, the first pressure spring is arranged at the left end of the valve core sleeve, one end of the first pressure spring is attached to the inner wall of the main control valve body, and the other end of the first pressure spring is attached to the convex opening of the outer wall of the valve core sleeve.
Preferably, the second pressure spring is arranged at the right end of the valve core sleeve, one end of the second pressure spring is attached to the convex opening of the outer wall of the valve core sleeve, and the other end of the second pressure spring is attached to the end face of the piston.
Preferably, the first air port is disposed to the right of the second air port.
A novel self-control type emergency emptying system operation method is characterized by comprising the following steps: the method comprises the following steps:
a, opening a main control valve to switch on a pump, an energy accumulator and an actuator, applying pressure into a single-action actuator of the valve by using a manual pump, enabling the pressure to enter from a first air port, pulling out a shifting sheet, driving a valve clack to move leftwards by a valve rod, forming a sealing state with a valve core sleeve, closing the valve, and forcing the valve clack to be tightly attached to the valve core sleeve by the valve core sleeve under the action of the internal pressure to push a piston to move downwards to realize pressure self-sealing and close the valve;
b, when the pressure of the pipeline is normal, the pilot valve is automatically opened, the pressure of the energy accumulator is transmitted to the sensing end of the main control valve through the control pipeline, the pressure is applied to the P end, the piston drives the valve rod and the valve core sleeve to continuously move leftwards under the pushing of the pressure, the shifting piece automatically resets under the action of the torsion spring, and the valve is kept in a closed state at the moment;
and c, when the pipeline pressure is abnormal and exceeds the set value of the pilot valve, the main control valve releases the pressure at the P end, the main control valve is opened under the combined action of the pressure spring and the pressure of the actuator, the valve clack and the valve core sleeve move leftwards, the valve core sleeve is limited in advance, the valve is opened, and the pressure is released from the second air port end.
The invention has the beneficial effects that:
1. the two-position three-way pilot valve is adopted for series control, the main control valve can be automatically switched into a pilot valve control mode when the pipeline pressure is recovered to be normal, the operation steps are reduced, and the risk of manual misoperation is reduced.
2. The main control valve is adopted to control the valve to be opened and closed, when the pressure change of the pipeline exceeds a set value, the valve is directly and completely opened, the valve cannot be kept in a half-open state, and the emergency opening performance is reliable.
3. The high-pressure sealing device solves the technical problem of high-pressure sealing of the main control valve, adopts a high-pressure control mode, and has the advantages of simple structure, high integration level, no external control pipeline and few leakage points.
4. The main control valve adopts a high-pressure large-flow design, and the emergency opening time is short.
5. The built-in oil tank has small volume, further reduces the cost, reduces the overall cost of the product by more than 50 percent compared with other similar products, is beneficial to popularization and promotion of the product, and is not easy to be impacted by external force to cause leakage.
6. The product has small volume, light weight and convenient installation.
Drawings
FIG. 1 is a schematic structural diagram of a novel self-controlled emergency evacuation system according to the present invention;
in the figure: 1. a main control valve body; 11. a first gas port; 12. a second gas port; 2. a first pressure spring; 3. a valve stem; 4. a valve core sleeve; 5. a valve flap; 6. a second pressure spring; 7. a piston; 8. a shifting sheet; 9. and fixing the screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the present embodiment is a novel self-control emergency evacuation system, which includes a reaction gate valve, a single-action actuator, a pilot valve assembly, a pump, a main control valve body 1, an overflow valve, a pressure gauge, a high-pressure stainless steel pipe, an energy accumulator, and a control pipeline, wherein the reaction gate valve, the single-action actuator, the pilot valve assembly, the pump, the overflow valve, the pressure gauge, the high-pressure stainless steel pipe, the energy accumulator, and the control pipeline are installed on the main control valve body 1, a first pressure spring 2, a valve rod 3, a valve core sleeve 4, a valve flap 5, a second pressure spring 6, and a piston 7 are installed in the main control valve body 1, the valve rod 3 is installed in the valve core sleeve 4, the valve flap 5 is installed at the left end of the valve rod 3, the right end of the valve rod 3 is connected with a shifting piece 8, the right end of the valve flap 5 is connected with the piston 7, the main control valve body 1 is provided with a first air port 11 and a second air port 12.
The plectrum 8 is fixedly arranged at the right end of the valve rod 3 through a rotating shaft.
The first pressure spring 2 is arranged at the left end of the valve core sleeve 4, one end of the first pressure spring 2 is attached to the inner wall of the main control valve body 1, and the other end of the first pressure spring is attached to the convex opening of the outer wall of the valve core sleeve 4.
The second pressure spring 6 is arranged at the right end of the valve core sleeve 4, one end of the second pressure spring 6 is attached to the convex opening of the outer wall of the valve core sleeve 4, and the other end of the second pressure spring is attached to the end face of the piston 7.
The first air port 11 is arranged to the right of the second air port 12.
A novel self-control type emergency emptying system operation method comprises the following steps:
a, opening a main control valve to switch on a pump, an energy accumulator and an actuator, applying pressure into a single-action actuator of the valve by using a manual pump, enabling the pressure to enter from a first air port, pulling out a shifting sheet, driving a valve clack to move leftwards by a valve rod, forming a sealing state with a valve core sleeve, closing the valve, and forcing the valve clack to be tightly attached to the valve core sleeve by the valve core sleeve under the action of the internal pressure to push a piston to move downwards to realize pressure self-sealing and close the valve;
b, when the pressure of the pipeline is normal, the pilot valve is automatically opened, the pressure of the energy accumulator is transmitted to the sensing end of the main control valve through the control pipeline, the pressure is applied to the P end, the piston drives the valve rod and the valve core sleeve to continuously move leftwards under the pushing of the pressure, the shifting piece automatically resets under the action of the torsion spring, and the valve is kept in a closed state at the moment;
and c, when the pipeline pressure is abnormal and exceeds the set value of the pilot valve, the main control valve releases the pressure at the P end, the main control valve is opened under the combined action of the pressure spring and the pressure of the actuator, the valve clack and the valve core sleeve move leftwards, the valve core sleeve is limited in advance, the valve is opened, and the pressure is released from the second air port end.
Interpretation of terms:
the direction of a flow passage hole of the reaction gate valve-gate valve is opposite to that of a normal valve, a balance rod is not arranged, the two-way downstream sealing design is adopted, when pressure exists in a pipeline, the pressure enters a valve middle cavity, thrust of the pressure of the sectional area of a valve rod can be generated, and the valve can be controlled through a pipeline medium. In general, when the valve is used, the valve can be opened or closed in a fault mode through the driving of a single-action hydraulic or pneumatic actuator.
The single-action actuator is a spring-reset hydraulic cylinder or air cylinder, and when used as a valve actuating mechanism, the single-action actuator can be divided into a straight stroke and an angular stroke according to the functions of the single-action actuator, and is used for a gate valve which generally adopts the straight stroke and a plug valve which generally adopts the angular stroke. The driving mode can be divided into pneumatic and hydraulic driving modes, and the structure can be divided into a piston type and a film type. On the basis, the actuator adopted by the valve utilizes the residual space of the actuator shell with the spring as an oil tank, so that the weight, the volume and the cost of the whole valve are reduced.
The pilot valve is a hydraulic or pneumatic two-position two-way or two-position three-way plunger valve, which is composed of parts such as a reversing valve core, a spring, a piston and a shell, and the opening and closing of the valve are controlled by pressure and the thrust of the spring.
Accumulator-a container for storing pressure, which may be of the piston and bladder type, is filled with pressure internally before use, with compressed gas or a spring acting as the energy storage medium.
The overflow valve is a hydraulic pressure control valve, and mainly plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in hydraulic equipment.
According to the invention, all control elements and driving elements are arranged on the valve, and the plug-in type control elements are adopted on the valve block, so that the integration level is high, the reliability is improved, the volume, the weight and the cost of the valve are reduced, the requirement on the working environment is reduced, and the operation and the maintenance are convenient; the oil tank is designed by utilizing the residual space of the spring arranged in the valve actuator, so that an oil tank does not need to be hung outside, the valve is simpler, and the cost is further reduced;
the main control valve is closed in two sections, and can be automatically reset to an automatic closing state when the pressure of the pipeline is recovered to be normal, so that the risk of failure of an emergency emptying system caused by manual operation errors is prevented, the design of a high-pressure valve core and a double underbalance structure is adopted, the maximum working pressure can reach 42MPa, and pressure self-sealing and auxiliary opening can be realized through the underbalance structure;
pressure enters from the first inlet end, the shifting sheet is pulled out, the valve rod drives the valve clack to move leftwards, a sealing state is formed between the valve clack and the valve core sleeve, the valve is closed, at the moment, under the action of internal pressure, the valve core sleeve is pushed rightwards, the valve clack is forced to be tightly attached to the valve core sleeve, and pressure self-sealing is realized; when the pressure of the pipeline is normal, the pilot valve is automatically opened, pressure is applied to the P end, the piston drives the valve rod and the valve core sleeve to continuously move leftwards under the pushing of the pressure, the shifting piece is reset under the action of the torsion spring, and at the moment, the valve is kept in a closed state; when the pressure of the pipeline is abnormal, the pilot valve discharges the pressure at the P end, the valve clack and the valve core sleeve move leftwards under the combined action of the compression spring and the internal pressure, the valve core sleeve is limited in advance, the valve is opened, the pressure is discharged from the B end, the valve is manually opened, the valve is automatically closed when a fault occurs, any external energy source is not needed, and safety guarantee is provided for pressure pipeline elements and field personnel; the driving medium is recycled, and no pollution is caused.
The invention has the advantages that:
the two-position three-way pilot valve is adopted for series control, the main control valve can be automatically switched into a pilot valve control mode when the pipeline pressure is recovered to be normal, the operation steps are reduced, and the risk of manual misoperation is reduced.
2. The main control valve is adopted to control the valve to be opened and closed, when the pressure change of the pipeline exceeds a set value, the valve is directly and completely opened, the valve cannot be kept in a half-open state, and the emergency opening performance is reliable.
3. The high-pressure sealing device solves the technical problem of high-pressure sealing of the main control valve, adopts a high-pressure control mode, and has the advantages of simple structure, high integration level, no external control pipeline and few leakage points.
4. The main control valve adopts a high-pressure large-flow design, and the emergency opening time is short.
5. The built-in oil tank has small volume, further reduces the cost, reduces the overall cost of the product by more than 50 percent compared with other similar products, is beneficial to popularization and promotion of the product, and is not easy to be impacted by external force to cause leakage.
6. The product has small volume, light weight and convenient installation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a novel automatic control formula emergency evacuation system which characterized in that: the high-pressure stainless steel valve comprises a reaction gate valve, a single-action actuator, a pilot valve component, a pump, a main control valve body, an overflow valve, a pressure gauge, a high-pressure stainless steel pipe, an energy accumulator and a control pipeline, wherein the reaction gate valve, the single-action actuator, the pilot valve component, the pump, the overflow valve, the pressure gauge, the high-pressure stainless steel pipe, the energy accumulator and the control pipeline are installed on the main control valve body, a first pressure spring, a valve rod, a valve core sleeve, a valve clack, a second pressure spring and a piston are arranged in the main control valve body, the valve core sleeve is embedded in the main control valve body, the valve rod is arranged in the valve core sleeve, the valve clack is arranged at the left end of the valve rod, the right end of the valve rod is connected with a shifting piece, the right end of the valve.
2. The novel self-controlled emergency venting system of claim 1, further comprising: the shifting piece is fixedly arranged at the right end of the valve rod through a rotating shaft.
3. The novel self-controlled emergency venting system of claim 1, further comprising: the first pressure spring is arranged at the left end of the valve core sleeve, one end of the first pressure spring is attached to the inner wall of the main control valve body, and the other end of the first pressure spring is attached to the convex opening of the outer wall of the valve core sleeve.
4. The novel self-controlled emergency venting system of claim 1, further comprising: the second pressure spring is arranged at the right end of the valve core sleeve, one end of the second pressure spring is attached to the convex opening of the outer wall of the valve core sleeve, and the other end of the second pressure spring is attached to the end face of the piston.
5. The novel self-controlled emergency venting system of claim 1, further comprising: the first air port is arranged on the right side of the second air port.
6. The novel method of operating a self-controlled emergency venting system as defined in claims 1-5, further comprising: the method comprises the following steps:
a, opening a main control valve to switch on a pump, an energy accumulator and an actuator, applying pressure into a single-action actuator of the valve by using a manual pump, enabling the pressure to enter from a first air port, pulling out a shifting sheet, driving a valve clack to move leftwards by a valve rod, forming a sealing state with a valve core sleeve, closing the valve, and forcing the valve clack to be tightly attached to the valve core sleeve by the valve core sleeve under the action of the internal pressure to push a piston to move downwards to realize pressure self-sealing and close the valve;
b, when the pressure of the pipeline is normal, the pilot valve is automatically opened, the pressure of the energy accumulator is transmitted to the sensing end of the main control valve through the control pipeline, the pressure is applied to the P end, the piston drives the valve rod and the valve core sleeve to continuously move leftwards under the pushing of the pressure, the shifting piece automatically resets under the action of the torsion spring, and the valve is kept in a closed state at the moment;
and c, when the pipeline pressure is abnormal and exceeds the set value of the pilot valve, the main control valve releases the pressure at the P end, the main control valve is opened under the combined action of the pressure spring and the pressure of the actuator, the valve clack and the valve core sleeve move leftwards, the valve core sleeve is limited in advance, the valve is opened, and the pressure is released from the second air port end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583293.2A CN112815122A (en) | 2020-12-28 | 2020-12-28 | Novel automatic control type emergency emptying system and operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583293.2A CN112815122A (en) | 2020-12-28 | 2020-12-28 | Novel automatic control type emergency emptying system and operation method |
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| CN112815122A true CN112815122A (en) | 2021-05-18 |
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| CN202011583293.2A Pending CN112815122A (en) | 2020-12-28 | 2020-12-28 | Novel automatic control type emergency emptying system and operation method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2755208A3 (en) * | 1996-10-25 | 1998-04-30 | Pagani Algela | Pressure regulator with automatic blocking of gas leaks |
| DE102006012304A1 (en) * | 2006-03-15 | 2007-09-20 | Grohe Ag | Lever valve has bush with opening parallel to/at distance from lever pivot path at least on one side, extending from outside to near pivot axis, holding sprung latching body with latching cam that interacts with control lever protrusion |
| CN201795090U (en) * | 2010-07-16 | 2011-04-13 | 郑锋 | Metal-sealed electromagnetic pneumatic control valve |
| CN204805220U (en) * | 2015-05-27 | 2015-11-25 | 上海朝田实业有限公司 | Piston ultralow pressure overflow valve |
| CN106195370A (en) * | 2016-08-13 | 2016-12-07 | 李军 | Cartridge balanced valve |
| CN206320392U (en) * | 2016-12-09 | 2017-07-11 | 湖北和瑞精密机械制造有限公司 | Pressure sensing pilot valve |
| CN206816928U (en) * | 2017-04-28 | 2017-12-29 | 德阳正光石油机械制造有限公司 | A kind of safety shut-off valve |
-
2020
- 2020-12-28 CN CN202011583293.2A patent/CN112815122A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2755208A3 (en) * | 1996-10-25 | 1998-04-30 | Pagani Algela | Pressure regulator with automatic blocking of gas leaks |
| DE102006012304A1 (en) * | 2006-03-15 | 2007-09-20 | Grohe Ag | Lever valve has bush with opening parallel to/at distance from lever pivot path at least on one side, extending from outside to near pivot axis, holding sprung latching body with latching cam that interacts with control lever protrusion |
| CN201795090U (en) * | 2010-07-16 | 2011-04-13 | 郑锋 | Metal-sealed electromagnetic pneumatic control valve |
| CN204805220U (en) * | 2015-05-27 | 2015-11-25 | 上海朝田实业有限公司 | Piston ultralow pressure overflow valve |
| CN106195370A (en) * | 2016-08-13 | 2016-12-07 | 李军 | Cartridge balanced valve |
| CN206320392U (en) * | 2016-12-09 | 2017-07-11 | 湖北和瑞精密机械制造有限公司 | Pressure sensing pilot valve |
| CN206816928U (en) * | 2017-04-28 | 2017-12-29 | 德阳正光石油机械制造有限公司 | A kind of safety shut-off valve |
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Application publication date: 20210518 |