Multi-drive integrated combined safety valve

Abstract

The invention relates to the field of safety valves, and provides a multi-drive integrated combined safety valve which comprises a valve body, an opening and closing assembly and a driving assembly. An inlet and an outlet for releasing fluid are formed in the valve main body; the opening and closing assembly is arranged in the valve body in a sliding mode and used for closing the inlet. The driving assembly comprises a sliding part and a medium conveying unit, the sliding part is slidably arranged in the valve body, the medium conveying unit communicates with the interior of the valve body, the medium conveying unit is used for conveying a medium into the valve body to drive the sliding part to move, and then the sliding part pushes the opening and closing assembly to move to open the inlet. According to the multi-drive integrated combined safety valve, the inlet can be driven to be opened through fluid; and the medium can also be actively conveyed into the valve main body through the medium conveying unit, and the medium is utilized to push the sliding part to move and drive the opening and closing assembly to move, so that the inlet is forcibly opened, and the problem that the opening driving mode of the safety valve is too single is solved.

Description

Technical Field

[0001] The present application relates to the field of safety valves, and in particular to a multi-drive integrated combination safety valve. Background Art

[0002] Safety valve is a safety device that plays a role in safety protection in the system. When the pressure in the system or equipment exceeds the preset safety value, the safety valve will automatically open and release some fluid or gas, thereby reducing the pressure in the system and preventing equipment damage or accidents caused by excessive pressure. When the pressure drops to the allowable value, the safety valve will automatically close to prevent the medium from continuing to flow out, so that the system pressure is always kept within the safe range.

[0003] At present, the safety valve is generally opened by the pressure of the medium itself, pushing the valve disc of the safety valve to open. When the medium pressure does not reach the set pressure, the safety valve cannot be opened. At this time, if there is a system failure, the safety valve needs to be forced to open and release the pressure. It cannot be achieved by only driving the valve to open by the medium pressure, and the protection effect of the safety valve will be invalid. And if the system stops running and the safety valve enters the maintenance stage, the valve needs to be kept open to meet maintenance needs. At this time, there is no system pressure and the safety valve cannot be self-driven. The driving method for the opening of the safety valve is too single. Summary of the invention

[0004] In order to solve the problem that the driving mode for opening the safety valve is too single, the present application provides a multi-drive integrated combination safety valve.

[0005] The multi-drive integrated combined safety valve provided in this application adopts the following technical solution: A multi-drive integrated combined safety valve comprises a valve body, an opening and closing component and a drive component.

[0006] The valve body is provided with an inlet.

[0007] The opening and closing component is slidably disposed in the valve body, and the opening and closing component is used to close the inlet.

[0008] The driving component includes a sliding member and a medium conveying unit. The sliding member is slidably disposed in the valve body. The medium conveying unit is connected to the interior of the valve body. The medium conveying unit is used to convey a medium to the interior of the valve body to drive the sliding member to move, thereby causing the sliding member to push the opening and closing component to move to open the inlet.

[0009] By adopting the above solution, the inlet can be opened by relying on the pressure of the fluid itself and / or the thrust of the sliding member, and the opening driving method is simple and diverse.

[0010] Optionally, the valve body is provided with a channel for the medium to enter.

[0011] The medium conveying unit includes a positioner, a valve, a conveying pipeline and a control module.

[0012] The positioner and the valve are both connected to the control module.

[0013] The positioner, the valve and the channel are communicated with each other through the delivery pipeline.

[0014] The positioner includes a position sensor, and the position sensor is used to detect the position of the opening and closing component.

[0015] By adopting the above solution, the opening and closing component can be accurately controlled to move to a preset position, thereby allowing the entrance to reach a preset opening degree.

[0016] Optionally, the multi-drive integrated combination safety valve also includes a pressure reducing valve.

[0017] The pressure reducing valve, the positioner, the valve and the channel are sequentially connected through the delivery pipeline.

[0018] By adopting the above solution, the pressure of the transported medium can be reduced and stabilized.

[0019] Optionally, the positioner further comprises a first position-limiting member, which at least partially penetrates into the valve body and is used to limit the opening and closing assembly, thereby limiting the maximum opening of the inlet.

[0020] By adopting the above solution, the movement stroke of the opening and closing component can be limited, thereby limiting the maximum opening degree of the entrance.

[0021] Optionally, the position of the first limiting member penetrating into the valve body is adjustable compared to the position of the valve body.

[0022] By adopting the above solution, the moving stroke of the opening and closing component can be adjusted.

[0023] Optionally, the first limiting member acts on a side of the opening and closing component away from the entrance to prevent the opening and closing component from moving away from the entrance.

[0024] The opening and closing component has a limiting portion.

[0025] The positioner further comprises a second limiting member, which cooperates with the limiting portion to lock the opening and closing assembly, thereby locking the opening of the inlet (111).

[0026] By adopting the above solution, the opening and closing component can be locked within the moving stroke, thereby keeping the opening degree of the entrance constant.

[0027] Optionally, the multi-drive integrated combination safety valve further comprises a reset component, and the reset component is used to drive the opening and closing component and the sliding member to reset when the inlet is opened, so as to close the inlet.

[0028] Optionally, the reset component includes: a first elastic member, the valve body and the opening and closing assembly are both connected to the first elastic member, and when the opening and closing assembly moves to open the inlet, the first elastic member is in a compressed state; The second elastic member is connected to the valve body and the sliding member. When the sliding member pushes the opening and closing assembly to open the inlet, the second elastic member is in a compressed state.

[0029] By adopting the above solution, the opening and closing components and the sliding parts can be reset after the multi-drive integrated combination safety valve completes the pressure relief.

[0030] Optionally, the passage has a plurality of openings communicating with the interior of the valve body, and the openings are directed toward a side of the sliding member facing away from the inlet.

[0031] By adopting the above solution, it is possible to achieve a rapid and uniform change in the medium pressure in the valve body and a rapid response of the sliding member.

[0032] The multi-drive integrated combination safety valve provided in the present application can drive the opening and closing components to move through the pressure of the fluid itself, thereby opening the inlet and completing self-driven opening; it can also actively deliver medium into the valve body through the medium delivery unit, use the medium to push the sliding part to move, and then drive the opening and closing components to move through the sliding part, thereby forcing the inlet to open under conditions of low fluid pressure or no fluid, thereby solving the problem of too single driving method for opening the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the multi-drive integrated combination safety valve provided in this application.

[0034] Figure 2 It is a three-dimensional structural schematic diagram of the multi-drive integrated combination safety valve provided in this application.

[0035] Figure 3 It is a side view of the multi-drive integrated combination safety valve provided in the present application.

[0036] Description of reference numerals: 1. Valve body; 11. Valve body; 111. Inlet; 112. Outlet; 12. Valve cover; 121. Channel; 2. Opening and closing assembly; 21. Valve stem; 22. Valve flap; 23. Guide member; 3. Driving assembly; 31. Sliding member; 32. Medium conveying unit; 321. Pressure reducing valve; 322. Positioner; 3221. Position sensor; 323. Valve; 324. Conveying pipeline; 4. Reset assembly; 41. First elastic member; 42. Second elastic member. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 —3 Provide further details of this application.

[0038] like Figure 1 to Figure 2 As shown, an embodiment of the present application discloses a multi-drive integrated combination safety valve, including a valve body 1, an opening and closing component 2 and a drive component 3.

[0039] The valve body 1 is provided with an inlet 111 and an outlet 112 for releasing fluid. Figure 1 In the figure, the arrow directions at the inlet 111 and the outlet 112 are the flow directions of the fluid.

[0040] The opening and closing assembly 2 is slidably disposed in the valve body 1 , and the opening and closing assembly 2 is used to close the inlet 111 .

[0041] The driving assembly 3 includes a sliding member 31 and a medium conveying unit 32. The sliding member 31 is slidably disposed in the valve body 1. The medium conveying unit 32 is connected to the inside of the valve body 1. The medium conveying unit 32 is used to convey the medium to the inside of the valve body 1 to drive the sliding member 31 to move, thereby causing the sliding member 31 to push the opening and closing assembly 2 to move to the open inlet 111.

[0042] Specifically, the valve body 1 can be made of stainless steel. The valve body 1 has a cavity inside, and the opening and closing assembly 2 and the sliding member 31 are both located in the cavity. Specifically, the valve body 1 includes a valve body 11 and a valve cover 12, and the valve cover 12 is covered on the valve body 11 and is threadedly connected to the valve body 11. The inlet 111 and the outlet 112 are both provided on the valve body 11.

[0043] The sliding member 31 can be a piston made of stainless steel. The sliding member 31 is in sliding contact with the inside of the valve body 1 , and the valve body 1 can limit the sliding member 31 . The sliding member 31 is specifically located in the valve cover 12 of the valve body 1 .

[0044] The opening and closing assembly 2 includes a valve stem 21, a valve flap 22 and a guide 23. A portion of the valve stem 21 is located in the valve cover 12 of the valve body 1, and the other portion is located in the valve body 11 of the valve body 1. The guide 23 is arranged in the valve cover 12 of the valve body 1. The valve stem 21 is connected to the guide 23, and the guide 23 is slidably connected to the valve body 1. The valve stem 21 passes through the sliding member 31, so that the sliding member 31 can limit the valve stem 21 and reduce the swing amplitude of the valve stem 21. The valve flap 22 is arranged at one end of the valve stem 21 close to the inlet 111. The valve stem 21 can slide along its own axial direction, thereby driving the valve flap 22 to block or open the inlet 111.

[0045] First, the multi-drive integrated combined safety valve provided in the embodiment of the present application can drive the inlet 111 to open by the pressure of the fluid itself. Specifically, when the pressure of the fluid is large enough, the fluid can push the valve flap 22 away from the inlet 111, so that the fluid can enter the valve body 1 from the inlet 111 and then be discharged from the outlet 112, thus completing the release of the fluid.

[0046] Secondly, the multi-drive integrated combined safety valve provided in the embodiment of the present application can also drive the opening and closing assembly 2 to move by means of the drive assembly 3, thereby forcing the inlet 111 to open. Specifically, the medium delivery unit 32 is arranged on the outside of the valve cover 12 of the valve body 1. The medium is introduced into the valve body 1 through the medium delivery unit 32, and the pressure of the medium is used to push the sliding member 31 away from the inlet 111. The sliding member 31 can contact the guide member 23 of the opening and closing assembly 2 during the movement, and drive the opening and closing assembly 2 to move together, so that the valve flap 22 is away from the inlet 111, and the inlet 111 is opened.

[0047] The multi-drive integrated combination safety valve provided in the embodiment of the present application can drive the opening and closing component 2 to move through the pressure of the fluid itself, thereby opening the inlet 111 and completing self-driven opening; it can also actively convey the medium into the valve body 1 through the medium conveying unit 32, use the medium to push the sliding member 31 to move, and then drive the opening and closing component 2 to move through the sliding member 31, thereby forcing the inlet 111 to open when the fluid pressure is small or there is no fluid, thereby solving the problem of too single driving method for opening the safety valve.

[0048] like Figure 1 to Figure 2 As shown, in some embodiments, a channel 121 for medium to enter is provided on the valve cover 12 of the valve body 1, and the medium conveying unit 32 includes a pressure reducing valve 321, a positioner 322, a valve 323, a conveying pipeline 324 and a control module, and the pressure reducing valve 321, the positioner 322, the valve 323 and the channel 121 are connected in sequence through the conveying pipeline 324.

[0049] Specifically, the medium conveyed by the medium conveying unit 32 may be air, thereby avoiding contamination of the valve body 1 .

[0050] The valve 323 may be a solenoid valve, and both the valve 323 and the positioner 322 are connected to the control module signal.

[0051] The pressure reducing valve 321 is used to reduce and stabilize the delivered air so that the delivered air pressure is within a reasonable range. The pressure reducing valve 321 can be a mechanical manually regulated valve or a valve regulated by an electrical signal. When the pressure reducing valve 321 is a valve regulated by an electrical signal, the pressure reducing valve 321 can be connected to the control module signal.

[0052] The positioner 322 includes a position sensor 3221 and a control unit. The control unit is connected to the control module by signal. A person can exchange information with the positioner 322 through the control module, for example, to set the position parameters of the opening and closing component 2 .

[0053] The position sensor 3221 is used to detect the position of the opening and closing component 2 , and the position of the opening and closing component 2 can reflect the opening degree of the inlet 111 .

[0054] The valve 323 is connected to the control unit or control module signal, so as to realize the regulation of the opening and closing degree of the valve 323, and then by adjusting the opening and closing degree of the valve 323, the operation of discharging the medium in the valve body 1 is realized.

[0055] The following is an introduction to the working process of the medium transport unit 32: First, the medium is driven into the delivery pipe 324 by components such as an air pump. After being decompressed by the pressure reducing valve 321, the medium flows through the positioner 322 and the valve 323 in sequence, and then enters the valve body 1 through the channel 121 on the valve body 1 and pushes the sliding member 31 to move, thereby opening the inlet 111.

[0056] The control unit can obtain the position information of the opening and closing component 2 detected by the position sensor 3221, and compare the information with the position parameters of the opening and closing component 2 set by the personnel through the control module, so as to determine whether the opening degree of the entrance 111 reaches the preset value.

[0057] When the preset value is not reached, the control unit or control module can further adjust the position of the opening and closing component 2 by controlling the air pump to continue to introduce the medium into the valve body 1 to increase the opening of the inlet 111; or by controlling the valve 323 to discharge the medium in the valve body 1, thereby reducing the opening of the inlet 111.

[0058] In some embodiments, the channel 121 has a plurality of openings communicating with the interior of the valve body 1 , so that the medium pressure inside the valve body 1 can change quickly and evenly.

[0059] The opening is located on the side of the sliding member 31 close to the inlet 111 . When the medium enters the valve body 1 , the air pressure on the side of the sliding member 31 close to the inlet 111 is greater than the air pressure on the side of the sliding member 31 away from the inlet 111 , thereby moving the sliding member 31 away from the inlet 111 .

[0060] Among them, Figure 1 As shown, the opening points to the side of the sliding member 31 away from the inlet 111, so that the medium flows in the direction away from the inlet 111 when entering the interior of the valve body 1. The medium can directly generate an impact force on the sliding member 31 and push the sliding member 31 to move without waiting for the air pressure on the side of the sliding member 31 close to the inlet 111 to gradually change, and the response speed is faster.

[0061] In some embodiments, the positioner 322 further includes a first limiting member, which at least partially penetrates into the valve body 1 and is used to limit the opening and closing assembly 2 .

[0062] Specifically, a through hole for the first stopper to penetrate is provided on the valve cover 12 of the valve body 1. The first stopper is at least partially located on the side of the valve stem 21 of the opening and closing component 2 away from the inlet 111, thereby limiting the movement stroke of the opening and closing component 2, preventing the opening and closing component 2 from being too far away from the inlet 111, and further limiting the maximum opening of the inlet 111, thereby preventing the fluid from being released too quickly and thus affecting the pressure relief accuracy of the multi-drive integrated combination safety valve.

[0063] Furthermore, the position of the first stopper inserted into the valve body 1 is adjustable relative to the position of the valve body 1. For example, the first stopper can be driven to translate or rotate by a first drive such as a cylinder or a motor, so that the part of the first stopper located on the side of the valve stem 21 away from the inlet 111 is displaced in the moving direction of the valve stem 21, thereby changing the moving stroke of the opening and closing component 2. The first drive such as a cylinder or a motor can be connected to a control module, so that a person can set or adjust the moving stroke of the opening and closing component 2 through the control module.

[0064] In some embodiments, the opening and closing assembly 2 has a limiting portion. The positioner 322 also includes a second limiting member.

[0065] Since the first position-limiting member acts on the side of the opening and closing component 2 away from the entrance 111 , although the first position-limiting member can limit the moving stroke of the opening and closing component 2 , the opening and closing component 2 can still move within the moving stroke range.

[0066] When the fluid drives the inlet 111 to open due to its own pressure, the fluid pressure will constantly change, causing the thrust of the fluid on the valve flap 22 to fluctuate, which will eventually cause the opening and closing component 2 to swing continuously, and the opening of the inlet 111 to change continuously, affecting the pressure relief effect.

[0067] In this embodiment, the limiting portion is located on the valve stem 21, and the limiting portion can be a limiting groove. The second limiting member is limitedly matched with the limiting portion, thereby locking the opening and closing assembly 2, so that the opening of the inlet 111 is locked.

[0068] Specifically, the second limiting member can be driven to move by a second driving member such as a cylinder, so that the second limiting member at least partially extends into the limiting portion, thereby locking the opening and closing assembly 2, thereby keeping the opening of the inlet 111 unchanged.

[0069] In some embodiments, there are multiple limiting parts, and the multiple limiting parts are arranged at intervals along the moving direction of the valve stem 21. The valve stem 21 can move under the driving action of the driving component 3, so that one of the limiting parts is limitedly matched with the second limiting member, so that the opening and closing component 2 can be locked at different openings of the inlet 111.

[0070] In other embodiments, the first limit member changes the moving stroke of the opening and closing component 2 by moving along the moving direction of the opening and closing component 2, and when the first limit member moves, the second limit member can move with the first limit member, so that the distance between the first limit member and the second limit member along the moving direction of the opening and closing component 2 remains unchanged.

[0071] Specifically, the positioner 322 also includes a mounting seat, on which a first stopper and a second drive member are disposed, and the second stopper is slidably disposed on the mounting seat. The first drive member drives the mounting seat to move along the moving direction of the opening and closing assembly 2, thereby changing the position of the first stopper.

[0072] There is at least one limiting portion in a position that satisfies the following conditions: when the opening and closing assembly 2 (the valve stem 21 thereof) abuts against the first limiting member, the second driving member can drive the second limiting member to move to a position-limiting fit with the limiting portion.

[0073] Since the opening of the entrance 111 depends on the distance between the opening and closing component 2 and the entrance 111 within the current moving stroke of the opening and closing component 2, when the opening and closing component 2 abuts against the first stopper, the distance between the opening and closing component 2 and the entrance 111 reaches the maximum. Therefore, through the above arrangement, when the entrance 111 reaches the maximum opening within the current moving stroke of the opening and closing component 2, the second stopper can lock the opening and closing component 2, thereby making the entrance 111 stable at the maximum opening under the current situation.

[0074] In addition, when the movement stroke of the opening and closing component 2 is adjustable, the maximum value of the distance between the opening and closing component 2 and the entrance 111 can also be changed, so that the opening and closing component 2 can be locked by the second limiter at the set position. The specific setting method can be: the control module controls the first driving member to drive the first limiter to move to the set position, and then the driving component 3 drives the opening and closing component 2 to move to abut against the first limiter. At this time, the opening and closing component 2 abutting against the first limiter is just in the preset position, and then the second driving member drives the second limiter to lock the opening and closing component 2, so that the entrance 111 can be kept at a constant opening.

[0075] like Figure 1 and Figure 3 As shown, in some embodiments, the multi-drive integrated combination safety valve further includes a reset component 4, which is used to drive the opening and closing component 2 and the sliding member 31 to reset when the inlet 111 is opened, so as to close the inlet 111.

[0076] Specifically, the reset component 4 includes a first elastic member 41, and the valve body 1 and the opening and closing component 2 are both connected to the first elastic member 41. When the pressure of the fluid itself or the pressure of the medium delivered by the medium delivery unit 32 drives the opening and closing component 2 to move to the open inlet 111, the first elastic member 41 is in a compressed state, and the fluid can be released and depressurized at this time. After the pressure is released, under the action of the restoring force of the first elastic member 41, the opening and closing component 2 can gradually reset and finally close the inlet 111.

[0077] It should be noted that when the opening and closing assembly 2 is driven to move only by the pressure of the fluid itself, since the sliding member 31 does not move, the first elastic member 41 is only used to reset the opening and closing assembly 2.

[0078] When the sliding member 31 is required to slide and drive the opening and closing assembly 2 to move, the first elastic member 41 is driving the opening and closing assembly 2 to return to its original position, and the opening and closing assembly 2 can also push the sliding member 31 to return to its original position.

[0079] Furthermore, since there may be a gap between the sliding member 31 and the opening and closing assembly 2 (the guide member 23), the sliding member 31 may not be completely reset after the opening and closing assembly 2 is reset. Therefore, in this embodiment, the reset assembly 4 also includes a second elastic member 42, and the valve body 1 and the sliding member 31 are both connected to the second elastic member 42. When the sliding member 31 pushes the opening and closing assembly 2 to move to the open inlet 111, the second elastic member 42 is gradually compressed. After the pressure relief is completed and the medium in the valve body 1 is released, the second elastic member 42 can drive the sliding member 31 to reset.

[0080] In this embodiment, both the first elastic member 41 and the second elastic member 42 can be springs.

Claims

1. A multi-drive integrated combined safety valve, characterized in that: include: The valve body (1) is provided with an inlet (111); An opening and closing component (2) is slidably disposed in the valve body (1), and the opening and closing component (2) is used to close the inlet (111); The driving assembly (3) comprises a sliding member (31) and a medium conveying unit (32), wherein the sliding member (31) is slidably disposed in the valve body (1), the medium conveying unit (32) is communicated with the interior of the valve body (1), and the medium conveying unit (32) is used to convey a medium into the interior of the valve body (1) to drive the sliding member (31) to move, thereby causing the sliding member (31) to push the opening and closing assembly (2) to move to open the inlet (111).

2. The multi-drive integrated combined safety valve according to claim 1, characterized in that: The valve body (1) is provided with a channel (121) for the medium to enter; The medium conveying unit (32) comprises a positioner (322), a valve (323), a conveying pipeline (324) and a control module; The positioner (322) and the valve (323) are both connected to the control module; The positioner (322), the valve (323) and the channel (121) are connected via the delivery pipeline (324); The positioner (322) comprises a position sensor (3221), and the position sensor (3221) is used to detect the position of the opening and closing component (2).

3. The multi-drive integrated combined safety valve according to claim 2 is characterized in that: The multi-drive integrated combined safety valve also includes a pressure reducing valve (321); The pressure reducing valve (321), the positioner (322), the valve (323), and the channel (121) are connected in sequence via the delivery pipeline (324).

4. The multi-drive integrated combined safety valve according to claim 2, characterized in that: The positioner (322) further comprises a first position-limiting member, the first position-limiting member at least partially penetrates into the valve body (1) and is used to limit the position of the opening and closing assembly (2), thereby limiting the maximum opening of the inlet (111).

5. The multi-drive integrated combined safety valve according to claim 4 is characterized in that: The position of the portion where the first limiting member penetrates into the valve body (1) is adjustable relative to the position of the valve body (1).

6. The multi-drive integrated combined safety valve according to claim 4, characterized in that: The first limiting member acts on a side of the opening and closing component (2) away from the entrance (111) to prevent the opening and closing component (2) from moving away from the entrance (111); The opening and closing component (2) has a limiting portion; The positioner (322) further comprises a second limiting member, the second limiting member being in limiting cooperation with the limiting portion, thereby locking the opening and closing assembly (2) so that the opening of the inlet (111) is locked.

7. The multi-drive integrated combined safety valve according to claim 1, characterized in that: The multi-drive integrated combined safety valve further comprises a reset component (4), wherein the reset component (4) is used to drive the opening and closing component (2) and the sliding member (31) to reset when the inlet (111) is opened, so as to close the inlet (111).

8. The multi-drive integrated combined safety valve according to claim 7, characterized in that: The reset component (4) comprises: a first elastic member (41), the valve body (1) and the opening and closing assembly (2) being both connected to the first elastic member (41), and when the opening and closing assembly (2) moves to open the inlet (111), the first elastic member (41) is in a compressed state; A second elastic member (42), the valve body (1) and the sliding member (31) are both connected to the second elastic member (42), and when the sliding member (31) pushes the opening and closing assembly (2) to move to open the inlet (111), the second elastic member (42) is in a compressed state.

9. The multi-drive integrated combined safety valve according to claim 2, characterized in that: The passage (121) has a plurality of openings communicating with the interior of the valve body (1), wherein the openings are directed toward a side of the sliding member (31) facing away from the inlet (111).

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