A high-pressure explosion-proof valve

Abstract

This invention belongs to the field of valve technology, specifically a high-pressure explosion-proof valve, including a valve body, a valve core assembly, a spring, and a cover plate. An inner valve core is installed inside the main valve core, connected to a second guide groove and an external pneumatic device via a hollow helical spring pipe. The pneumatic device performs pressurization or depressurization operations, keeping the main valve core relatively stationary at a preset height or in a closed position. This design is convenient to operate and not only serves as a check valve but also as a regulator or shut-off device. The size of the first chamber and the spring preload of the spring tube can be adjusted via a piston and adjusting rod, thereby regulating the opening pressure of the explosion-proof valve. A pressure sensor and flow meter are installed to collect pressure and flow data at the valve inlet and outlet, facilitating monitoring of the valve's operating status and controlling the pneumatic device to perform pressurization or depressurization operations based on data changes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a high-pressure explosion-proof valve. BACKGROUND

[0002] In the field of valves, explosion-proof valves are often used in high-pressure pipelines or equipment to prevent the explosion of pipeline or equipment parts under high pressure, or the valve itself has good explosion-proof performance and can withstand high pressure. Explosion-proof valves ensure the safety of pipelines and equipment under high pressure.

[0003] Patent document CN216743116U discloses an explosion-proof valve, a valve disc is slidably arranged on a valve rod, a guide groove is formed in the side wall of the valve disc facing the valve cover, the end of the valve rod is inserted into and slides in the guide groove, a spring is fixedly connected between the inner wall of the valve cover facing the valve disc and the side wall of the valve disc facing the valve cover, the spring is circumferentially sleeved on the outside of the valve rod, and the spring is stretched and contracted along the sliding direction of the valve disc. The height of the valve rod in the guide groove can be controlled by rotating the rotating disc, the sliding distance of the valve rod in the guide groove is adjusted, the height of the valve disc opening is controlled, and the purpose of controlling the flow of the cavity into the cavity is achieved. However, in the explosion-proof valve, the valve rod can only limit the maximum height of the valve core, and it is time-consuming and laborious to operate the valve rod. When the pipeline needs to be always open or closed, additional valves need to be added to realize the opening and closing function. This is also a common defect of existing explosion-proof valves, which is single function and can only achieve the check action, but cannot achieve the cutting or always open action. SUMMARY

[0004] The present application aims to solve the problems of single function and inconvenient operation of the explosion-proof valve in the prior art, and provides a high-pressure explosion-proof valve.

[0005] In order to achieve the above object, the application provides a high-pressure explosion-proof valve, which comprises a valve body, a valve core assembly, a spring and a cover plate, the valve body is provided with a liquid inlet and a liquid outlet which are perpendicular to each other, the valve core assembly is slidably arranged in a mounting cavity of the valve body, the mounting cavity at the upper part of the valve core assembly is a first cavity, one end of the spring is abutted against the upper end of the valve core assembly, the valve core assembly is moved downward to close the liquid inlet, the first cavity is not communicated with the liquid outlet, the top of the valve body is sealingly fixed with the cover plate, the valve core assembly comprises a main valve core and an inner valve core which is slidably arranged in a valve core inner cavity of the main valve core, the lower part of the inner valve core is provided with a first guide rod, the upper part of the inner valve core is provided with a second guide rod, the lower part of the valve core inner cavity is provided with a first guide groove which is sealingly matched with the first guide rod, the upper part of the valve core inner cavity is provided with a second guide groove which is sealingly matched with the second guide rod, the inner valve core is moved in the valve core inner cavity to make the first cavity communicated with or disconnected from the liquid inlet; the spring is a spring tube which has a channel in the inside, the first gas port at the upper part of the spring is communicated with an external pneumatic device, the second gas port at the lower part of the spring is communicated with the second guide groove.

[0006] Preferably, the sleeve is arranged in the mounting cavity in parallel with the axis of the liquid inlet, the valve core assembly is slidably arranged in the sleeve, the side part of the sleeve is formed with a side opening which is communicated with the liquid outlet, the bottom part of the sleeve is formed with a bottom opening which is communicated with the liquid inlet, and the bottom part of the sleeve is provided with a valve seat around the bottom opening.

[0007] Preferably, the main valve core is provided with a first liquid inlet hole and a second liquid inlet hole, the valve core inner cavity is communicated with the liquid inlet through the first liquid inlet hole, the valve core inner cavity is communicated with the first cavity through the second liquid inlet hole, and the inner valve core is provided with a balance hole; when the balance hole is communicated with the first liquid inlet hole and the second liquid inlet hole, the first cavity is communicated with the liquid inlet.

[0008] Preferably, the axis of the balance hole does not coincide with the axes of the first liquid inlet hole and the second liquid inlet hole; or the axis of the balance hole coincides with the axis of the first liquid inlet hole and does not coincide with the axis of the second liquid inlet hole; or the axis of the balance hole coincides with the axis of the second liquid inlet hole and does not coincide with the axis of the first liquid inlet hole.

[0009] Preferably, a piston is slidably arranged on the inside of the sleeve, an adjusting rod is threadedly connected to the cover plate, the lower end of the adjusting rod is abutted against the upper part of the piston, and the upper end of the adjusting rod extends out of the cover plate; the lower side of the piston is a first cavity, the upper side of the piston is a second cavity, the other end of the spring is abutted against the lower part of the piston, a through hole is formed in the upper part of the piston, and the first gas port is sealingly arranged in the through hole.

[0010] Preferably, a trachea connecting port is arranged on the upper side wall of the valve body, and the first gas port extends into the second cavity and is connected with the trachea connecting port through a metal hose.

[0011] Preferably, the trachea connecting port is connected with the pneumatic device, and the pneumatic device can provide positive pressure or negative pressure.

[0012] Preferably, a pressure sensor and a flow meter are arranged at the liquid inlet and the liquid outlet, and the pressure sensor, the flow meter and the pneumatic device are connected with a valve controller.

[0013] Preferably, the second gas port is connected with the second guide groove through a joint.

[0014] Preferably, the first guide groove is in communication with the liquid inlet.

[0015] The high-pressure explosion-proof valve has the beneficial effects that:

[0016] 1. The inner valve core is arranged in the main valve core, the second guide groove is connected with the external pneumatic device through the hollow spiral spring pipe, the main valve core is kept relatively static at a preset height position or kept at a closed position through the pressurizing or depressurizing operation of the pneumatic device, the operation is convenient, the high-pressure explosion-proof valve has the functions of check, adjustment and cut-off.

[0017] 2. The liquid in the first cavity has a certain buffering effect, so that the opening speed is greatly reduced, and the valve core assembly can be protected; the spring pipe is a hard metal pipe, which has the elasticity of a spring as a whole, but has a strong compression strength.

[0018] 3. The size of the first cavity and the spring pre-tightening force of the spring pipe can be adjusted through the piston and the adjusting rod, so that the opening pressure of the high-pressure explosion-proof valve can be adjusted.

[0019] 4. The pressure sensor and the flow meter are arranged to collect the pressure and flow data of the inlet and outlet of the valve, so that the running state of the valve can be monitored, and the pneumatic device is controlled to perform pressurizing or depressurizing operation according to the change of the data. DETAILED DESCRIPTION

[0020] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a structural schematic view of the high-pressure explosion-proof valve of the present application;

[0022] Figure 2 It is an enlarged view of the valve core assembly of the high-pressure explosion-proof valve of the present application;

[0023] Figure 3 A schematic diagram of the spring of the high-pressure explosion-proof valve of the present application;

[0024] Figure 4 A schematic diagram of the inner valve core of the high-pressure explosion-proof valve of the present application in a suspended state;

[0025] Figure 5 A schematic diagram of the inner valve core of the high-pressure explosion-proof valve of the present application at the top;

[0026] Figure 6 A schematic diagram of the main valve core of the high-pressure explosion-proof valve of the present application in an open state.

[0027] In the figure: valve body 1, liquid inlet 101, liquid outlet 102, air pipe connection port 103, first cavity 104, second cavity 105, sleeve 2, side opening 201, bottom opening 202, valve seat 203, valve core assembly 3, main valve core 31, first liquid inlet hole 310, second liquid inlet hole 311, valve core inner cavity 312, first guide groove 313, second guide groove 314, inner valve core 32, first guide rod 321, second guide rod 322, balance hole 323, joint 33, spring 4, first air port 401, second air port 402, cover plate 5, piston 6, adjusting rod 7.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present text. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments herein clearer, the technical scheme of the embodiments herein will be described clearly and completely below in conjunction with the drawings in the embodiments herein. Obviously, the described embodiments are part of the embodiments herein, rather than all the embodiments. Based on the embodiments herein, all other embodiments obtained by a person of ordinary skill in the art without creative labor shall fall within the scope of protection of the present text. It should be noted that the embodiments herein and the features in the embodiments can be combined with each other in any manner without conflict.

[0030] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0031] REFERENCE Figures 1-6The application provides a high-pressure explosion-proof valve, which comprises a valve body 1, a valve core assembly 3, a spring 4 and a cover plate 5, the valve body 1 is provided with a liquid inlet 101 and a liquid outlet 102 which are perpendicular to each other, the valve core assembly 3 is slidably arranged in a mounting cavity of the valve body 1, the mounting cavity at the upper part of the valve core assembly 3 is a first cavity 104, one end of the spring 4 is abutted against the upper end of the valve core assembly 3, the valve core assembly 3 is moved downwards to close the liquid inlet 101, the first cavity 104 is not communicated with the liquid outlet 102, the cover plate 5 is sealingly and fixedly arranged at the top of the valve body 1, the valve core assembly 3 comprises a main valve core 31 and an inner valve core 32 which is slidably arranged in a valve core inner cavity 312 of the main valve core 31, the lower part of the inner valve core 32 is provided with a first guide rod 321, the upper part of the inner valve core 32 is provided with a second guide rod 322, the lower part of the valve core inner cavity 312 is provided with a first guide groove 313 which is sealingly matched with the first guide rod 321, the upper part of the valve core inner cavity 312 is provided with a second guide groove 314 which is sealingly matched with the second guide rod 322, the inner valve core 32 is moved in the valve core inner cavity 312 to make the first cavity 104 communicated with or disconnected from the liquid inlet 101, the spring 4 is a spring pipe which has a channel in the inside, a first gas port 401 at the upper part of the spring 4 is communicated with an external pneumatic device, and a second gas port 402 at the lower part of the spring 4 is communicated with the second guide groove 314.

[0032] The application sets the inner valve core in the main valve core, connects the second guide groove with the external pneumatic device through the hollow spiral spring pipe, when the pneumatic device is pressurized or depressurized, the pressure in the second guide groove is increased or decreased correspondingly, so as to drive the inner valve core to move downwards or upwards in the valve core inner cavity. The movement of the inner valve core in the valve core inner cavity can block or communicate the liquid inlet with the first cavity, when the explosion-proof valve is required to only play the check valve role, the inner valve core is in the open state by pressurizing or depressurizing through the pneumatic device, the upper part and the lower part of the main valve core are communicated, and the main valve core is moved upwards under the pressure of the liquid inlet, so as to open the valve; when the main valve core of the explosion-proof valve is required to be kept relatively static at a certain height position or kept at the closed position, the inner valve core is only required to be closed at the height position or the closed position, so that the liquid in the first cavity is completely isolated from the outside, when the pressure of the liquid inlet is further increased, the liquid volume will not be greatly changed even if the inlet pressure is further increased, because the liquid has a small compression coefficient, so that the main valve core can be maintained at the current opening degree.

[0033] As another implementation, a return spring can also be installed in the first guide groove and the second guide groove, and when in an initial state without liquid pressure and pneumatic device pressure supply, the return spring can make the inner valve core in a suspended state, and the first cavity is communicated with the liquid inlet, at this time, when the explosion-proof valve needs to only play a check valve role, the pneumatic device is closed, and the inner valve core only moves under the action of the liquid pressure, and the liquid gradually enters the first cavity, and under the action of the liquid, the main valve core is also gradually opened, and because the liquid in the first cavity has a certain buffering effect, the opening speed is greatly reduced, and the opening and closing speed is prevented from being too fast; when the main valve core of the explosion-proof valve needs to be kept relatively static at a certain height position or kept at a closed position, only the pneumatic device needs to be pressurized or depressurized at the height position or the closed position, so that the inner valve core is closed.

[0034] In addition, in the first cavity, a spring tube is used as a force applying component for driving the main valve core to close, so that the main valve core has a check valve function, and the spring tube is a hard metal tube, which has the elasticity of a spring as a whole, but has relatively strong compression strength. Under the high pressure condition of the first cavity, the spring tube can have good compression capacity, and can ensure the gas delivery of the pneumatic device and the driving of the inner valve core. A general metal straight tube does not meet the condition of the height change of the first cavity, and a general metal hose has weak compression performance. Therefore, the hard metal spring tube is selected in the first cavity with high pressure liquid, which has the advantages of meeting the spring elasticity requirement and the gas delivery requirement.

[0035] In the present application, the main valve core can be made in an upper and lower split form, so as to facilitate the placement of the inner valve core in the valve core inner cavity of the main valve core, or other forms of the prior art can be used, as long as the inner valve core can be installed in the main valve core as required.

[0036] The high-pressure explosion-proof valve further comprises a sleeve 2 installed in the mounting cavity in parallel with the liquid inlet 101 axis, the valve core assembly 3 is slidingly arranged in the sleeve 2, the side of the sleeve 2 is formed with a side opening 201 communicated with the liquid outlet 102, the bottom of the sleeve 2 is formed with a bottom opening 202 communicated with the liquid inlet 101, and the bottom of the sleeve 2 is provided with a valve seat 203 around the bottom opening 202. The sleeve is placed in the mounting cavity of the valve body, so that the valve core component and the sleeve can better cooperate, when the valve core assembly or the sleeve is worn out, only the damaged sleeve or valve core assembly needs to be replaced, and the entire valve body does not need to be replaced, which facilitates the installation and maintenance of the valve and reduces the maintenance cost.

[0037] The main valve core 31 is provided with a first inlet hole 310 and a second inlet hole 311. The inner cavity 312 of the valve core is connected to the liquid inlet 101 through the first inlet hole 310, and the inner cavity 312 of the valve core is connected to the first cavity 104 through the second inlet hole 311. The inner valve core 32 is provided with a balance hole 323. When the balance hole 323 is connected to the first inlet hole 310 and the second inlet hole 311, the first cavity 104 can be connected to the liquid inlet 101. The main valve core is provided with a first inlet hole and a second inlet hole, and the inner valve core is provided with a balance hole. The first inlet hole, the second inlet hole, and the balance hole form a connecting channel. The opening and closing of the inner valve core is controlled by the opening and closing of the balance hole and the first inlet hole and / or the second inlet hole, thereby further controlling the action of the main valve core.

[0038] In the first embodiment of the communication channel, the axis of the balance hole 323 does not coincide with the axes of the first liquid inlet hole 310 and the second liquid inlet hole 311. In this way, when the inner valve core moves to the lower or upper part of the valve core cavity, the communication channel will be blocked and the inner valve core will be closed. The communication channel will only open when the inner valve core is in a suspended state.

[0039] In a second embodiment of the communication channel, the axis of the balance hole 323 coincides with the axis of the first liquid inlet hole 310, but does not coincide with the axis of the second liquid inlet hole 311. In this way, when the inner valve core moves to the upper part of the valve core cavity, the communication channel will be blocked and the inner valve core will be closed. When the inner valve core moves to the lower part of the valve core cavity or is suspended, the communication channel will be opened.

[0040] As a third embodiment of the communication channel, the axis of the balance hole 323 coincides with the axis of the second liquid inlet hole 311, but does not coincide with the axis of the first liquid inlet hole 310. In this way, when the inner valve core moves to the lower part of the valve core cavity, the communication channel will be blocked and the inner valve core will be closed. When the inner valve core moves to the upper part of the valve core cavity or is suspended, the communication channel will be opened.

[0041] In all three implementations of the connecting channel, the position of the inner valve core can be controlled by a pneumatic device, thereby facilitating the control of the position of the main valve core and keeping it in a preset position.

[0042] A piston 6 is slidably mounted on the upper side of the sleeve 2. An adjusting rod 7 is threadedly connected to the cover plate 5. The lower end of the adjusting rod 7 abuts against the upper part of the piston 6, and the upper end of the adjusting rod 7 extends outside the cover plate 5. The lower side of the piston 6 is a first cavity 104, and the upper side of the piston 6 is a second cavity 105. The other end of the spring 4 abuts against the lower part of the piston 6. A through hole is opened on the piston 6, and the first air port 401 is sealed and passes through the through hole. The size of the first cavity and the spring preload of the spring tube can be adjusted by the piston and the adjusting rod, thereby adjusting the opening pressure of the explosion-proof valve.

[0043] The valve body 1 has an air pipe connection port 103 on its upper side wall. The first air port 401 extends into the second cavity 105 and is connected to the air pipe connection port 103 via a metal hose. The air pipe connection port 103 is connected to the pneumatic device, which can provide positive or negative pressure. The second cavity is isolated from the first cavity by a piston, and the pressure in the second cavity is much lower than that in the first cavity. Therefore, the second cavity has the pressure conditions for normal gas delivery using a metal hose, allowing the pneumatic device to be connected to the spring.

[0044] Pressure sensors and flow meters are installed at both the liquid inlet 101 and the liquid outlet 102. The pressure sensors, flow meters, and pneumatic devices are all connected to the valve controller. The pressure sensors and flow meters collect pressure and flow data at the valve inlet and outlet, transmit this data to the valve controller, and then the valve controller transmits it wirelessly to a remote server, displaying it on a monitor. This monitors the valve's operating status. Based on data changes, the remote server sends operation commands to the valve controller, which then controls the pneumatic device to perform pressure supply or depressurization operations.

[0045] The second air port 402 is connected to the second guide groove 314 via a connector 33. Using a connector makes it easier to connect the spring and the main valve core.

[0046] The first guide groove 313 remains in communication with the liquid inlet 101. In this case, the first guide groove is open to the outside, so that the first guide rod 321 bears the pressure from the liquid inlet. At this time, it is necessary to supply pressure to the second guide groove through a pneumatic device. By adjusting the pressure difference between the second guide groove and the first guide groove, the pressure difference applied to the inner valve core is adjusted, thereby controlling the movement of the inner valve core and the main valve core.

[0047] Although preferred embodiments have been described herein, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this document.

[0048] Obviously, those skilled in the art can make various modifications and variations to this document without departing from its spirit and scope. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, the intent of this document also includes such modifications and variations.

Claims

1. A high-pressure explosion-proof valve, comprising a valve body (1), a valve core assembly (3), a spring (4), and a cover plate (5), wherein the valve body (1) is provided with a liquid inlet (101) and a liquid outlet (102) perpendicular to each other, the valve core assembly (3) is slidingly arranged in a mounting cavity of the valve body (1), the mounting cavity at the upper part of the valve core assembly (3) is a first cavity (104), one end of the spring (4) abuts against the upper end of the valve core assembly (3) to move the valve core assembly (3) downward to close the liquid inlet (101), the first cavity (104) is not communicated with the liquid outlet (102), and the top of the valve body (1) is sealingly fixed with the cover plate (5), characterized in that, The valve core assembly (3) comprises a main valve core (31) and an inner valve core (32) slidingly arranged in a valve core inner cavity (312) of the main valve core (31), the inner valve core (32) is provided with a first guide rod (321) at the lower part, the inner valve core (32) is provided with a second guide rod (322) at the upper part, the valve core inner cavity (312) is provided with a first guide groove (313) in sealing cooperation with the first guide rod (321) at the lower part, the valve core inner cavity (312) is provided with a second guide groove (314) in sealing cooperation with the second guide rod (322) at the upper part, the inner valve core (32) moves in the valve core inner cavity (312) to make the first cavity (104) communicate with or disconnect from the liquid inlet (101); the spring (4) is a spring tube with a channel inside, a first air port (401) at the upper part of the spring (4) communicates with external pneumatic devices, a second air port (402) at the lower part of the spring (4) communicates with the second guide groove (314).

2. A high pressure explosion-proof valve according to claim 1, characterized in that A sleeve (2) is further included, the sleeve (2) is installed in the mounting cavity in parallel with the axis of the liquid inlet (101), the valve core assembly (3) is slidingly arranged in the sleeve (2), the side of the sleeve (2) is formed with a side opening (201) communicating with the liquid outlet (102), the bottom of the sleeve (2) is formed with a bottom opening (202) communicating with the liquid inlet (101), the bottom of the sleeve (2) is provided with a valve seat (203) around the bottom opening (202).

3. A high pressure explosion-proof valve according to claim 1, characterized in that The main valve core (31) is provided with a first liquid inlet hole (310) and a second liquid inlet hole (311), the valve core inner cavity (312) communicates with the liquid inlet (101) through the first liquid inlet hole (310), the valve core inner cavity (312) communicates with the first cavity (104) through the second liquid inlet hole (311), the inner valve core (32) is provided with a balance hole (323); when the balance hole (323) communicates with the first liquid inlet hole (310) and the second liquid inlet hole (311), the first cavity (104) communicates with the liquid inlet (101).

4. A high pressure explosion-proof valve according to claim 3, characterized in that The axis of the balance hole (323) does not coincide with the axes of the first liquid inlet hole (310) and the second liquid inlet hole (311); or, the axis of the balance hole (323) coincides with the axis of the first liquid inlet hole (310) and does not coincide with the axis of the second liquid inlet hole (311); or, the axis of the balance hole (323) coincides with the axis of the second liquid inlet hole (311) and does not coincide with the axis of the first liquid inlet hole (310).

5. A high pressure explosion-proof valve according to claim 2, characterized in that The sleeve (2) is internally slidably provided with a piston (6), the cover plate (5) is threadedly connected with an adjusting rod (7), the lower end of the adjusting rod (7) abuts against the upper portion of the piston (6), and the upper end of the adjusting rod (7) extends out of the cover plate (5); the lower side of the piston (6) is a first cavity (104), the upper side of the piston (6) is a second cavity (105), the other end of the spring (4) abuts against the lower portion of the piston (6), the piston (6) is provided with a through hole in the upper portion, and the first gas port (401) is sealingly arranged in the through hole.

6. A high pressure explosion-proof valve according to claim 5, characterized in that The upper side wall of the valve body (1) is provided with an air pipe connecting port (103), the first gas port (401) extends into the second cavity (105) and is connected with the air pipe connecting port (103) through a metal hose.

7. A high pressure explosion-proof valve according to claim 6, characterized in that The air pipe connecting port (103) is connected with the pneumatic device, and the pneumatic device can provide positive pressure or negative pressure.

8. A high pressure explosion-proof valve according to claim 7, characterized in that Pressure sensors and flow meters are arranged at the liquid inlet (101) and the liquid outlet (102), and the pressure sensors, the flow meters and the pneumatic device are connected with a valve controller.

9. A high pressure explosion-proof valve according to claim 1, characterized in that The second gas port (402) is connected with the second guide groove (314) through a joint (33).

10. A high pressure explosion-proof valve according to claim 1, characterized in that The first guide groove (313) is in communication with the liquid inlet (101).

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