CN115949780A - High-pressure explosion-proof valve - Google Patents

Abstract

The invention belongs to the technical field of valves, in particular to a high-pressure explosion-proof valve which comprises a valve body, a valve core assembly, a spring and a cover plate, wherein an inner valve core is arranged in a main valve core, a hollow spiral spring pipeline is connected with a second guide groove and an external pneumatic device, and the pneumatic device is used for pressurizing or pressure-extracting operation, so that the main valve core is kept relatively static or kept at a closed position at a preset height position; the size of the first cavity can be adjusted through the piston and the adjusting rod, and the spring pre-tightening force of the spring tube can also be adjusted, so that the opening pressure of the explosion-proof valve is adjusted; the pressure sensor and the flowmeter are arranged to acquire pressure and flow data of the inlet and the outlet of the valve, so that the running state of the valve is convenient to monitor, and the pneumatic device is controlled to supply pressure or pump pressure according to the change of the data.

Description

High-pressure explosion-proof valve

Technical Field

The invention relates to the technical field of valves, in particular to a high-pressure explosion-proof valve.

Background

In the field of valves, explosion-proof valves are commonly used in high-pressure pipelines or equipment and are used for preventing the explosion of parts of the pipelines or the equipment under high pressure, or the valves have good explosion-proof performance and can bear high pressure, and the safety of the pipelines and the equipment under the high-pressure condition is ensured by the explosion-proof valves.

Patent document CN216743116U discloses an explosion-proof valve, the valve clack has slided on the valve rod, the guide slot has been seted up on the lateral wall of valve clack towards the valve gap, the tip that the guide slot supplied the valve rod inserts and slides, the valve gap is towards the inner wall of valve clack and the valve clack towards fixedly connected with spring between the lateral wall of valve gap, spring circumference encircles the cover and is established outside the valve rod, the spring is flexible along the slip direction of valve clack, the accessible rotates the carousel and controls the height of valve rod in the guide slot, the sliding distance of adjustment valve rod in the guide slot, thereby the height that the control valve clack was opened, reach the purpose of the flow that the control entered the chamber and flowed into out the chamber. However, in the explosion-proof valve, the valve rod can only play a role in limiting the maximum height of the valve core, the operation of the valve rod is time-consuming and labor-consuming, when the pipeline is required to be normally opened or normally closed, an additional valve needs to be added to realize the opening and closing function, the common defect of the existing explosion-proof valve is that the function is single, the non-return function can only be realized, and the cut-off or normally open function cannot be realized.

Disclosure of Invention

The invention aims to solve the problems of single function, inconvenience in operation and the like of an explosion-proof valve in the prior art, and provides a high-pressure explosion-proof valve.

In order to achieve the purpose, the invention provides a high-pressure explosion-proof valve, which comprises a valve body, a valve core assembly, a spring and a cover plate, wherein the valve body is provided with a liquid inlet and a liquid outlet which are perpendicular to each other, the valve core assembly is arranged in an installation cavity of the valve body in a sliding manner, the installation cavity at the upper part of the valve core assembly is a first cavity, one end of the spring abuts against the upper end of the valve core assembly to enable the valve core assembly to move downwards to seal the liquid inlet, the first cavity is not communicated with the liquid outlet, the top of the valve body is fixedly provided with the cover plate in a sealing manner, the valve core assembly comprises a main valve core and an inner valve core arranged in a valve core inner cavity of the main valve core in a sliding manner, 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 in a sealing manner, the upper part of the valve core inner cavity is provided with a second guide groove in a sealing manner, and the inner cavity of the inner valve core can move to enable the first cavity to be communicated with or disconnected with the liquid inlet; the spring is a spring pipe with a channel inside, a first air port at the upper part of the spring is communicated with an external pneumatic device, and a second air port at the lower part of the spring is communicated with the second guide groove.

Preferably, the valve core assembly is arranged in the sleeve in a sliding mode, a side opening communicated with the liquid outlet is formed in the side portion of the sleeve, a bottom opening communicated with the liquid inlet is formed in the bottom of the sleeve, and a valve seat is arranged at the bottom of the sleeve around the bottom opening.

Preferably, a first liquid inlet hole and a second liquid inlet hole are formed in the main valve core, the inner cavity of the valve core is communicated with the liquid inlet through the first liquid inlet hole, the inner cavity of the valve core is communicated with the first cavity through the second liquid inlet hole, and a balance hole is formed in the inner valve core; when the balance hole is communicated with the first liquid inlet hole and the second liquid inlet hole, the first cavity can be communicated with the liquid inlet.

Preferably, the axis of the balance hole is not coincident with the axes of the first liquid inlet hole and the second liquid inlet hole; or the axis of the balance hole is coincident with the axis of the first liquid inlet hole and is not coincident 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.

Preferably, a piston is slidably arranged on the upper side inside the sleeve, an adjusting rod is connected to the cover plate in a threaded manner, the lower end of the adjusting rod abuts against the upper part of the piston, and the upper end of the adjusting rod extends out of the cover plate; the piston lower side is the first cavity, the piston upside is the second cavity, the spring other end supports and leans on the piston lower part, the piston is last to have seted up the through-hole, first gas port is sealed to be worn to establish in the through-hole.

Preferably, an air pipe connecting port is formed in the side wall of the upper portion of the valve body, and the first air port extends into the second cavity and is connected with the air pipe connecting port through a metal hose.

Preferably, the air pipe connecting port is connected with the pneumatic device, and the pneumatic device can provide positive pressure or negative pressure.

Preferably, the liquid inlet and the liquid outlet are both provided with a pressure sensor and a flowmeter, and the pressure sensor, the flowmeter and the pneumatic device are all connected with a valve controller.

Preferably, the second air port is connected to the second guide groove through a joint.

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

The high-pressure explosion-proof valve provided by the invention has the beneficial effects that:

1. the main valve core is internally provided with the inner valve core, the second guide groove and an external pneumatic device are connected through a hollow spiral spring pipeline, and the pneumatic device is used for pressurizing or pumping operation, so that the main valve core is kept relatively static or kept at a closed position at a preset height position, the operation is convenient, and the main valve core has a non-return function and also has a regulating or stopping function.

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, has the elasticity of a spring as a whole, but has stronger compressive strength.

3. The size of the first cavity can be adjusted through the piston and the adjusting rod, and the spring pre-tightening force of the spring tube can also be adjusted, so that the opening pressure of the explosion-proof valve is adjusted.

4. The pressure sensor and the flowmeter are arranged to acquire pressure and flow data of the inlet and the outlet of the valve, so that the running state of the valve is monitored conveniently, and the pneumatic device is controlled to supply pressure or pump pressure according to the change of the data.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural diagram of a high-pressure explosion-proof valve of the invention;

FIG. 2 is an enlarged view of the valve core assembly of the high pressure explosion proof valve of the present invention;

FIG. 3 is a schematic view of the spring of the high pressure explosion proof valve of the present invention;

FIG. 4 is a schematic diagram of the inner valve core of the high-pressure explosion-proof valve of the invention in a suspension state;

FIG. 5 is a schematic view of the high pressure explosion proof valve of the present invention with the inner spool at the top;

fig. 6 is a schematic diagram of the high-pressure explosion-proof valve of the invention when the main valve core is opened.

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

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments herein clearer, the technical solutions in the embodiments herein will be clearly and completely described below with reference to the drawings in the embodiments herein, and it is obvious that the described embodiments are some, but not all of the embodiments herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments herein without making any creative effort, shall fall within the scope of protection. It should be noted that the embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.

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, what is meant is "including but not limited to".

Referring to fig. 1 to 6, the invention provides a high-pressure explosion-proof valve, which includes 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 that are perpendicular to each other, the valve core assembly 3 is slidably disposed in an installation cavity of the valve body 1, the installation cavity at the upper portion 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, so that the valve core assembly 3 moves downward to close the liquid inlet 101, the first cavity 104 is not communicated with the liquid outlet 102, the top of the valve body 1 is hermetically fixed with the cover plate 5, the valve core assembly 3 includes a main valve core 31 and an inner valve core 32 slidably disposed in a valve core cavity 312 of the main valve core 31, the lower portion of the inner valve core 32 is provided with a first guide rod 321, the upper portion of the inner valve core 32 is provided with a second guide rod 322, the lower portion of the valve core cavity 312 is provided with a first guide groove 313 hermetically engaged with the first guide rod 321, the upper portion of the valve core cavity 312 is provided with a second guide rod 322, and the inner cavity 312 is provided with a second guide groove 314, and the inner valve core 312 is capable of moving in the first cavity 104 or the first cavity 104; the spring 4 is a spring tube with a channel inside, a first air port 401 at the upper part of the spring 4 is communicated with an external pneumatic device, and a second air port 402 at the lower part of the spring 4 is communicated with the second guide groove 314.

According to the invention, 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 pipeline, and when the pneumatic device performs pressurization or pressure extraction operation, the pressure in the second guide groove can be correspondingly increased or decreased, so that the inner valve core is driven to move downwards or upwards in the inner cavity of the valve core. When the explosion-proof valve only plays a check role, the inner valve core can be pressurized or pumped by a pneumatic device to be in an open state, so that the upper part and the lower part of the main valve core are communicated, and the main valve core moves upwards under the action of the pressure at the liquid inlet, so that the valve is opened; when the main valve core of the explosion-proof valve is required to be kept relatively static or at a closing position at a certain height position, the inner valve core is required to be closed only at the height position or the closing position, so that the liquid in the first cavity can be completely isolated from the outside, and when the pressure of the liquid inlet is further increased, the liquid has a smaller compression coefficient, and the volume of the liquid cannot be changed too much even if the pressure of the inlet is further increased, so that the main valve core can be maintained at the current opening degree.

As another embodiment, a return spring may be installed in the first guide groove and the second guide groove, and when there is no liquid pressure and the pneumatic device supplies pressure in the initial state, the return spring may make the inner valve core in a suspended state, so that the first cavity is communicated with the liquid inlet, at this time, when the explosion-proof valve needs to only perform a check function, the pneumatic device is closed, so that the inner valve core moves only under the liquid pressure, and the liquid gradually enters the first cavity, and at the same time, the main valve core is gradually opened under the liquid function, and since the liquid in the first cavity has a certain buffering function, the opening speed is greatly reduced, and the over-fast opening and closing speed is prevented; when the main valve core of the explosion-proof valve is required to keep relatively static or closed at a certain height position, the inner valve core is only required to be closed at the height position or the closed position by pressurizing or extracting pressure by using a pneumatic device.

In addition, in the first cavity, the spring pipe is used as a force application component for driving the main valve core to close, so that the main valve core has a non-return function, meanwhile, the spring pipe is a hard metal pipe and has elasticity of a spring as a whole, but has stronger compressive strength, under the high-pressure condition of the first cavity, the spring pipe can have good compressive capacity and can ensure gas conveying of a pneumatic device and driving of the inner valve core, a common metal straight pipe is not in accordance with the condition of height change of the first cavity, and the compressive performance of a common metal hose is weaker, so that the hard metal spring pipe is selected in consideration in the first cavity with high-pressure liquid, and the high-pressure liquid-conveying valve has the advantage of meeting the requirements on elasticity of the spring and gas conveying.

In the invention, the main valve core can be manufactured in a vertically split manner, so that the inner valve core can be conveniently placed in the inner cavity of the main valve core, and other manners in the prior art can be adopted as long as the inner valve core can be installed in the main valve core as required.

The high-pressure explosion-proof valve further comprises a sleeve 2, the sleeve 2 and the liquid inlet 101 are installed in the installation cavity in an axis parallel mode, the valve core assembly 3 is arranged in the sleeve 2 in a sliding mode, a side opening 201 communicated with the liquid outlet 102 is formed in the side portion of the sleeve 2, a bottom opening 202 communicated with the liquid inlet 101 is formed in the bottom of the sleeve 2, and a valve seat 203 is arranged at the position, around the bottom opening 202, of the bottom of the sleeve 2. Place the sleeve in the installation intracavity of valve body, can make the better cooperation of case part and sleeve, when case subassembly or sleeve took place wearing and tearing, only need to change the sleeve or the case subassembly of damage can, and need not be taken along with whole valve body by the replacement, made things convenient for the installation and the maintenance of valve, reduced cost of maintenance.

A first liquid inlet hole 310 and a second liquid inlet hole 311 are formed in the main valve element 31, the valve element inner cavity 312 is communicated with the liquid inlet 101 through the first liquid inlet hole 310, the valve element inner cavity 312 is communicated with the first cavity 104 through the second liquid inlet hole 311, and a balance hole 323 is formed in the inner valve element 32; when the balance hole 323 is communicated with the first liquid inlet hole 310 and the second liquid inlet hole 311, the first chamber 104 can be communicated with the liquid inlet 101. The main valve core is provided with a first liquid inlet hole and a second liquid inlet hole, the inner valve core is provided with a balance hole, the first liquid inlet hole, the second liquid inlet hole and the balance hole form a communicating channel, and the opening and closing of the inner valve core are controlled through the on-off of the balance hole and the first liquid inlet hole and/or the second liquid inlet hole, so that the action of the main valve core is further controlled.

As a first embodiment of the communication channel, the axis of the balancing hole 323 does not coincide with the axes of the first liquid inlet hole 310 and the second liquid inlet hole 311, so that when the inner valve core moves to the lower part or the upper part of the inner cavity of the valve core, the communication channel is blocked, the inner valve core is closed, and when the inner valve core is in a suspended state, the communication channel is opened.

As a second embodiment of the communication passage, the axis of the balance hole 323 coincides with the axis of the first fluid inlet hole 310 and does not coincide with the axis of the second fluid inlet hole 311, so that when the inner core moves to the upper portion of the core cavity, the communication passage is blocked, the inner core is closed, and when the inner core moves to the lower portion of the core cavity or floats, the communication passage is opened.

As a third embodiment of the communication channel, the axis of the balancing 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, so that when the inner valve core moves to the lower part of the inner cavity of the valve core, the communication channel is blocked, the inner valve core is closed, and when the inner valve core moves to the upper part of the inner cavity of the valve core or floats, the communication channel is opened.

In all three embodiments of the communication channel, the position of the inner spool can be controlled by pneumatic means, so that the position of the main spool can be controlled to be kept at a preset position.

A piston 6 is arranged on the upper side inside the sleeve 2 in a sliding mode, an adjusting rod 7 is connected to the cover plate 5 in a threaded mode, 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 provided with a first cavity 104, the upper side of the piston 6 is provided with a second cavity 105, the other end of the spring 4 abuts against the lower part of the piston 6, the piston 6 is provided with a through hole, and the first air port 401 is hermetically arranged in the through hole in a penetrating manner. The size of the first cavity can be adjusted through the piston and the adjusting rod, and the spring pre-tightening force of the spring tube can also be adjusted, so that the opening pressure of the explosion-proof valve is adjusted.

A gas pipe connecting port 103 is arranged on the side wall of the upper part of the valve body 1, and the first gas port 401 extends into the second cavity 105 and is connected with the gas pipe connecting port 103 through a metal hose; the air pipe connecting port 103 is connected with the pneumatic device, and the pneumatic device can provide positive pressure or negative pressure. The second cavity is isolated from the first cavity by the piston, and the pressure of the second cavity is far smaller than that of the first cavity, so that the pressure condition that the metal hose is normally used for conveying gas is provided in the second cavity, and the pneumatic device is connected with the spring.

And the liquid inlet 101 and the liquid outlet 102 are respectively provided with a pressure sensor and a flowmeter, and the pressure sensor, the flowmeter and the pneumatic device are respectively connected with a valve controller. The pressure sensor and the flowmeter are arranged to collect pressure and flow data of an inlet and an outlet of the valve, the pressure and flow data are transmitted to the valve controller, the valve controller transmits the pressure and flow data to the remote server through wireless signals, the pressure and flow data are displayed on the display and used for monitoring the running state of the valve, the remote server sends an operation instruction to the valve controller according to the change of the data, and then the valve controller controls the pneumatic device to supply pressure or pump pressure.

The second air port 402 is connected to the second guide groove 314 through a joint 33. Adopt to connect can be more convenient connecting spring and main valve core.

The first guide groove 313 is in communication with the liquid inlet 101. In this case, the first guide groove is opened to the outside so that the first guide rod 321 receives the pressure at the liquid inlet, and at this time, the pressure needs to be supplied to the second guide groove by a pneumatic device, and the pressure difference applied to the inner spool is adjusted by adjusting the pressure difference between the second guide groove and the first guide groove, thereby controlling the movement of the inner spool and the movement of the main spool.

While the preferred embodiments herein have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of this disclosure.

It will be apparent to those skilled in the art that various changes and modifications may be made herein without departing from the spirit and scope thereof. Thus, it is intended that such changes and modifications be included herein, provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. A high-pressure explosion-proof valve comprises a valve body (1), a valve core assembly (3), a spring (4) and a cover plate (5), wherein a liquid inlet (101) and a liquid outlet (102) which are perpendicular to each other are arranged on the valve body (1), the valve core assembly (3) is arranged in a mounting cavity of the valve body (1) in a sliding mode, the mounting cavity in the upper portion 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 enable the valve core assembly (3) to move downwards to seal the liquid inlet (101), the first cavity (104) is not communicated with the liquid outlet (102), the cover plate (5) is fixed to the top of the valve body (1) in a sealing mode, the high-pressure explosion-proof valve is characterized in that the valve core assembly (3) comprises a main valve core (31) and an inner valve core (32) which is arranged in a valve core inner cavity (312) of the main valve core (31) in a sliding mode, a first guide rod (321) is arranged at the lower portion of the inner core (32), a second guide rod (322) is arranged at the upper portion of the inner cavity (312), a second guide rod (322) is arranged at the lower portion of the valve core (312), and a second guide rod (322) is arranged at the upper portion (313) matched with a second guide groove (322) at the upper portion of the inner cavity (322), the inner valve core (32) moves in the valve core inner cavity (312) to enable the first cavity (104) to be communicated with or disconnected 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) is communicated with an external pneumatic device, and a second air port (402) at the lower part of the spring (4) is communicated with the second guide groove (314).

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

3. The high-pressure explosion-proof valve according to claim 1, wherein a first liquid inlet hole (310) and a second liquid inlet hole (311) are arranged on the main valve core (31), the valve core inner cavity (312) is communicated with the liquid inlet (101) through the first liquid inlet hole (310), the valve core inner cavity (312) is communicated with the first cavity (104) through the second liquid inlet hole (311), and a balance hole (323) is arranged on the inner valve core (32); when the balance hole (323) is communicated with the first liquid inlet hole (310) and the second liquid inlet hole (311), the first cavity (104) can be communicated with the liquid inlet (101).

4. A high-pressure explosion-proof valve according to claim 3, characterized in that the axes of the balance hole (323) and the axes of the first liquid inlet hole (310) and the second liquid inlet hole (311) are not coincident; or the axis of the balancing 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 balancing 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. The high-pressure explosion-proof valve according to claim 2 is characterized in that a piston (6) is slidably arranged on the upper side inside the sleeve (2), an adjusting rod (7) is connected to the cover plate (5) in a threaded manner, 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 out of the cover plate (5); the lower side of the piston (6) is provided with a first cavity (104), the upper side of the piston (6) is provided with a second cavity (105), the other end of the spring (4) abuts against the lower part of the piston (6), the piston (6) is provided with a through hole, and the first air port (401) is arranged in the through hole in a sealing and penetrating manner.

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

7. A high pressure explosion proof valve according to claim 6 wherein the air pipe connection port (103) is connected to the pneumatic means which can provide positive or negative pressure.

8. A high pressure explosion proof valve according to claim 7 wherein a pressure sensor and a flow meter are provided at the liquid inlet (101) and the liquid outlet (102), and the pressure sensor, the flow meter and a pneumatic device are connected to a valve controller.

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

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

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