Hydraulic double-pipe explosion-proof valve

Abstract

The application provides a hydraulic double-pipeline explosion-proof valve, which comprises a valve body, a valve cavity arranged in the valve body shell, a first valve interface arranged at one end of the valve body, a second valve interface arranged at the other end of the valve body, a third valve interface arranged on the shell of the valve body, and an explosion-proof mechanism arranged in the valve body; the explosion-proof mechanism comprises first fixed valve discs arranged at both ends in the valve cavity, a valve column arranged between the two first fixed valve discs, and second fixed valve core discs arranged at the ends away from each other of the first fixed valve discs and arranged in the valve cavity; balance expansion rods are arranged at both ends in the valve column, and the balance expansion rods are connected with movable valve cores at the execution ends of the balance expansion rods; the movable valve cores are arranged between the first fixed valve discs and the second fixed valve core discs at the same end. The application can handle the explosion-proof treatment of different pipelines respectively, and further improves the safety of the pipelines connected with the explosion-proof valve.

Description

Technical Field

[0001] This invention relates to the technical field of explosion-proof valves, specifically to a hydraulic dual-line explosion-proof valve. Background Technology

[0002] In pipeline systems that transport liquids or gases, explosion-proof valves are often installed on the pipelines to facilitate maintenance after a pipeline burst.

[0003] According to the patent document with application number CN200610116931.3, the hydraulic dual-line explosion-proof valve includes a valve body and a valve cavity. The valve body is equipped with a first pipe interface, a second pipe interface, and a third pipe interface. The first pipe interface communicates with the valve cavity through a first channel, the second pipe interface communicates with the valve cavity through a second channel, and the third pipe interface is perpendicular to the valve cavity. A movable valve core is installed inside the valve cavity. The diameter of the movable valve core is larger than the diameters of the first and second channels, and compression springs are fitted at both ends of the movable valve core. The beneficial effects of the hydraulic dual-line explosion-proof valve of this invention are: it can be used as a one-inlet, two-outlet explosion-proof valve, automatically blocking the burst pipe after one hydraulic line bursts, while the unburst pipe remains unobstructed, ensuring the normal operation of the entire hydraulic system. It can also be used as a two-inlet, one-outlet or one-inlet, one-outlet explosion-proof valve.

[0004] The aforementioned explosion-proof valve can function as a one-inlet, two-outlet explosion-proof valve. After one of the hydraulic lines bursts, it can automatically block the bursting line. However, with traditional explosion-proof valves, when one bursting hydraulic line is blocked, the other hydraulic line must be opened, which cannot effectively handle the situation where two hydraulic lines burst simultaneously. Summary of the Invention

[0005] This invention provides a hydraulic dual-line explosion-proof valve to solve the technical problems mentioned in the background section.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A hydraulic dual-line explosion-proof valve includes a valve body, a valve cavity disposed within the valve body housing, a first valve interface at one end of the valve body, a second valve interface at the other end of the valve body, a third valve interface on the valve body housing, and an explosion-proof mechanism inside the valve body.

[0008] The explosion-proof mechanism includes a first fixed valve disc installed at both ends inside the valve cavity, a valve column installed between the two first fixed valve discs, and a second fixed valve core disc located at one end of the first fixed valve discs that is far apart from each other and installed inside the valve cavity.

[0009] The valve stem has a balance telescopic rod inserted at both ends inside. The actuating end of the balance telescopic rod is connected to a movable valve core. The movable valve core is located between the first fixed valve disc and the second fixed valve core disc at the same end.

[0010] Furthermore, the balance telescopic rod includes a section rod inserted into one end of the valve stem, and a piston rod inserted into the section rod housing. One end of the piston rod extends into the interior of the section rod and is slidably connected to the inner wall of the section rod. The other end of the piston rod passes through the first fixed valve disc and is connected to the movable valve core. In this invention, by sliding the piston rod on the section rod, the movable valve core on the piston rod can slide in a straight line, thereby improving the stability of the movable valve core sliding in the valve cavity.

[0011] Furthermore, the balance telescopic rod also includes a first pipe installed at one end of the housing of the rod section. The end of the first pipe away from the rod section extends between the two first fixed valve discs. In this invention, the medium enters the rod section through the first pipe and pushes the piston rod, so that the piston rod extends in conjunction with the medium conveyed near the second valve interface and the third valve interface, thereby pushing the movable valve core to press on the second fixed valve core disc, blocking the through hole on the second fixed valve core disc, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0012] Furthermore, the balance telescopic rod also includes a second pipe installed at the end of the rod away from the first pipe. The second pipe passes through the first fixed valve disc and the second fixed valve core disc. In this invention, the piston rod shortens due to the push of the medium conveyed near the second valve interface and the third valve interface, so as to push the movable valve core to press on the first fixed valve disc, block the through hole on the first fixed valve disc, reduce the leakage of the medium, and achieve the purpose of explosion prevention.

[0013] Furthermore, a recess is provided between the first fixed valve disc and the second fixed valve core disc at the same end. The recess is located on the cavity of the valve chamber. In this invention, by setting the recess, the medium inside the valve chamber can flow through the gap between the recess and the movable valve core when the movable valve core moves into the cavity.

[0014] Furthermore, the concave cavity is provided with threaded sections at both ends. The threaded sections are provided on the surface of the valve cavity. The valve cavity is connected to the first fixed valve disc and the second fixed valve core disc through the threaded sections. In this invention, the threaded sections enable the worker to adjust the position of the first fixed valve disc and the second fixed valve core disc, ensuring that the movable valve core can contact the first fixed valve disc or the second fixed valve core disc when the piston rod extends or retracts, thereby improving the stability of the explosion-proof effect of the explosion-proof valve.

[0015] Furthermore, both sides of the first fixed valve disc and the second fixed valve core disc are provided with convex discs, and a sealing ring is fitted around the outside of the convex discs. In this invention, the convex discs provide support for the installation of the sealing rings, and the sealing rings reduce the gap between the first fixed valve disc and the second fixed valve core disc and the valve cavity, thereby improving the sealing performance, so as to seal the first fixed valve disc and the second fixed valve core disc, reduce the leakage of the medium, and improve the explosion-proof effect.

[0016] Furthermore, both the first fixed valve disc and the second fixed valve core disc have through holes on their housings. The through holes are arranged in a circular array around the axis of the disc body. In this invention, the first fixed valve disc and the second fixed valve core disc supply the flow of the medium through the array of through holes on them.

[0017] Furthermore, the radius of the movable valve core is equal to the radius of the cross-section of the valve cavity. In this invention, the radius of the movable valve core is the same as the radius of the cross-section of the valve cavity, so that the movable valve core can slide on the surface of the valve cavity, so as to guide the movable valve core to slide in a straight line through the cavity, and the medium in the cavity can effectively promote the movement of the movable valve core, reducing the impact of the gap between the movable valve core and the cavity on the movement of the movable valve core.

[0018] Furthermore, both the first fixed valve disc and the second fixed valve core disc have cross grooves on their housings. The cross grooves are located at the axis of the first fixed valve disc and the second fixed valve core disc. In this invention, the first fixed valve disc and the second fixed valve core disc are connected by cross grooves, which facilitates workers to adjust the position of the first fixed valve disc and the second fixed valve core disc on the threaded section.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] Firstly, this invention can handle explosion-proof treatment when different pipelines burst, further improving the safety of pipelines connected to explosion-proof valves. Specifically, when a pipeline near the first valve interface or the second valve interface bursts, but the third valve interface can flow normally, the medium transported near the third valve interface flows into the first pipeline. The medium enters the section rod through the first pipeline and pushes the piston rod, thereby pushing the movable valve core to press on the second fixed valve core disc, blocking the through hole on the second fixed valve core disc, reducing the leakage of the medium, and achieving the purpose of explosion-proof.

[0021] Secondly, in this invention, the pipeline near the first valve interface or the second valve interface can flow normally, while when the pipeline near the third valve interface bursts, the medium enters the section rod through the second pipeline and pushes the piston rod. The piston rod shortens in conjunction with the medium being transported near the second and third valve interfaces, thereby pushing the movable valve core to press on the first fixed valve disc, blocking the through hole on the first fixed valve disc, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a cutaway view of the valve stem of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the valve cavity of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the first fixed valve disc of the present invention;

[0028] Figure 6 This is a right view of the present invention;

[0029] Figure 7 This is a front view of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the movable valve core of the present invention.

[0031] In the diagram: 10, valve body; 20, valve chamber; 21, concave cavity; 22, threaded section; 30, first valve interface; 40, second valve interface; 50, third valve interface; 60, explosion-proof mechanism; 61, first fixed valve disc; 611, convex disc; 612, sealing ring; 613, through hole; 614, cross groove; 62, valve stem; 621, balance telescopic rod; 6211, section rod; 6212, piston rod; 6213, second pipe; 6214, first pipe; 622, movable valve core; 63, second fixed valve core disc. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] For the implementation examples, please refer to the appendix. Figure 1-8 A hydraulic dual-line explosion-proof valve includes a valve body 10, a valve cavity 20 disposed within the housing of the valve body 10, a first valve interface 30 provided at one end of the valve body 10, a second valve interface 40 provided at the other end of the valve body 10, a third valve interface 50 provided on the housing of the valve body 10, and an explosion-proof mechanism 60 provided inside the valve body 10.

[0036] The explosion-proof mechanism 60 includes a first fixed valve disc 61 installed at both ends inside the valve cavity 20, a valve column 62 installed between the two first fixed valve discs 61, and a second fixed valve core disc 63 located at one end of the first fixed valve discs 61 that is far apart from each other and installed inside the valve cavity 20.

[0037] The valve stem 62 has a balance telescopic rod 621 inserted at both ends inside. The actuating end of the balance telescopic rod 621 is connected to a movable valve core 622. The movable valve core 622 is located between the first fixed valve disc 61 and the second fixed valve core disc 63 at the same end.

[0038] For details, please refer to the appendix. Figure 2 and 3 The balance telescopic rod 621 includes a section rod 6211 inserted into one end of the valve column 62, and a piston rod 6212 inserted into the housing of the section rod 6211. One end of the piston rod 6212 extends into the interior of the section rod 6211 and is slidably connected to the inner wall of the section rod 6211. The other end of the piston rod 6212 passes through the first fixed valve disc 61 and is connected to the movable valve core 622.

[0039] The balance telescopic rod 621 also includes a first pipe 6214 provided at one end of the housing installed on the section rod 6211, and the end of the first pipe 6214 away from the section rod 6211 extends to the space between the two first fixed valve discs 61.

[0040] The balance telescopic rod 621 also includes a second pipe 6213 installed at the end of the rod 6211 away from the first pipe 6214, and the second pipe 6213 passes through the first fixed valve disc 61 and the second fixed valve core disc 63.

[0041] It should be noted that, in this embodiment, by sliding the piston rod 6212 on the section rod 6211, the movable valve core 622 on the piston rod 6212 can slide in a straight line, thereby improving the stability of the movable valve core 622 sliding in the valve cavity 20 and facilitating the movable valve core 622 to block the first fixed valve disc 61 or the second fixed valve core disc 63.

[0042] Furthermore, when a pipeline near the first valve port 30 or the second valve port 40 bursts, but the third valve port 50 can flow normally, the medium transported near the third valve port 50 flows into the first pipeline 6214. The medium enters the section rod 6211 through the first pipeline 6214 and pushes the piston rod 6212. The piston rod 6212 extends in coordination with the medium transported near the second valve port 40 and the third valve port 50, thereby pushing the movable valve core 622 to press on the second fixed valve core disc 63, blocking the through hole 613 on the second fixed valve core disc 63, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0043] Furthermore, when the pipeline near the first valve port 30 or the second valve port 40 can flow normally, but the pipeline near the third valve port 50 bursts, the medium enters the section rod 6211 through the second pipeline 6213 and pushes the piston rod 6212. The piston rod 6212 shortens in conjunction with the medium being transported near the second valve port 40 and the third valve port 50, thereby pushing the movable valve core 622 to press against the first fixed valve disc 61, blocking the through hole 613 on the first fixed valve disc 61, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0044] For details, please refer to the appendix. Figure 2 and 4 A recess 21 is provided between the first fixed valve disc 61 and the second fixed valve core disc 63 at the same end, and the recess 21 is provided on the cavity of the valve cavity 20;

[0045] The concave cavity 21 is provided with threaded sections 22 at both ends. The threaded sections 22 are provided on the cavity surface of the valve cavity 20. The valve cavity 20 is connected to the first fixed valve disc 61 and the second fixed valve core disc 63 through the threaded sections 22.

[0046] It should be noted that in this embodiment, when no burst occurs in the pipelines near the first valve port 30, the second valve port 40 and the third valve port 50, the medium pressure on both sides of the movable valve core 622 can be balanced. Through the setting of the cavity 21, the medium inside the valve cavity 20 can flow through the gap between the cavity 21 and the movable valve core 622 when the movable valve core 622 moves into the cavity 21.

[0047] Furthermore, the threaded section 22 allows workers to adjust the positions of the first fixed valve disc 61 and the second fixed valve core disc 63, ensuring that the movable valve core 622 can contact the first fixed valve disc 61 or the second fixed valve core disc 63 when the piston rod 6212 extends or retracts, thereby improving the stability of the explosion-proof effect of the explosion-proof valve.

[0048] For details, please refer to the appendix. Figure 2 and 5 Both sides of the first fixed valve disc 61 and the second fixed valve core disc 63 are provided with convex discs 611, and a sealing ring 612 is sleeved on the outside of the convex discs 611.

[0049] Both the first fixed valve disc 61 and the second fixed valve core disc 63 are provided with through holes 613, and the through holes 613 are arranged in a circular array around the axis of the disc body;

[0050] The radius of the movable valve core 622 is equal to the radius of the cross-section of the valve cavity 20;

[0051] Both the first fixed valve disc 61 and the second fixed valve core disc 63 are provided with cross grooves 614 on their housings. The cross grooves 614 are located at the axis of the first fixed valve disc 61 and the second fixed valve core disc 63.

[0052] It should be noted that, in this embodiment, the convex plate 611 provides support for the installation of the sealing ring 612. The sealing ring 612 reduces the gap between the first fixed valve disc 61 and the second fixed valve core disc 63 and the valve cavity 20, thereby improving the sealing performance. This facilitates the sealing of the first fixed valve disc 61 and the second fixed valve core disc 63, reduces the leakage of the medium, and improves the explosion-proof effect.

[0053] Furthermore, the first fixed valve disc 61 and the second fixed valve core disc 63 are supplied with the flow of the medium through the through holes 613 arranged in an array thereon;

[0054] Furthermore, the radius of the movable valve core 622 is the same as the radius of the cross-section of the valve cavity 20, so that the movable valve core 622 can slide on the cavity surface of the valve cavity 20, so that the movable valve core 622 can be guided to slide in a straight line through the cavity, and the medium in the cavity can effectively promote the movement of the movable valve core 622, reducing the impact of the gap between the movable valve core 622 and the cavity on the pushing of the movable valve core 622;

[0055] Furthermore, the first fixed valve disc 61 and the second fixed valve core disc 63 are connected by a cross groove 614 on their surfaces, which facilitates the worker to adjust the position of the first fixed valve disc 61 and the second fixed valve core disc 63 on the threaded section 22.

[0056] The specific operation method of this invention is as follows:

[0057] In order to use explosion-proof valves to transport media and to maintain safety in the event of pipeline rupture, the first valve port 30, the second valve port 40 and the third valve port 50 are connected to the pipeline. The medium enters the valve chamber 20 through the third valve port 50, and flows out of the pipeline through the first valve port 30 and the second valve port 40 respectively through the valve chamber 20.

[0058] When a pipeline near the first valve port 30 or the second valve port 40 bursts, but the third valve port 50 can still flow normally, the medium transported near the third valve port 50 flows into the first pipeline 6214. The medium enters the section rod 6211 through the first pipeline 6214 and pushes the piston rod 6212. The piston rod 6212 extends in coordination with the medium transported near the second valve port 40 and the third valve port 50, thereby pushing the movable valve core 622 to press on the second fixed valve core disc 63, sealing the through hole 613 on the second fixed valve core disc 63, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0059] When the pipeline near the first valve port 30 or the second valve port 40 can flow normally, but the pipeline near the third valve port 50 bursts, the medium enters the section rod 6211 through the second pipeline 6213 and pushes the piston rod 6212. The piston rod 6212 shortens in conjunction with the medium being transported near the second valve port 40 and the third valve port 50, thereby pushing the movable valve core 622 to press on the first fixed valve disc 61, blocking the through hole 613 on the first fixed valve disc 61, reducing the leakage of the medium, and achieving the purpose of explosion prevention.

[0060] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A hydraulic dual-line explosion-proof valve, comprising a valve body (10) and a valve cavity (20) disposed within the housing of the valve body (10), characterized in that, The valve body (10) has a first valve interface (30) at one end, a second valve interface (40) at the other end, a third valve interface (50) on the housing of the valve body (10), and an explosion-proof mechanism (60) inside the valve body (10). The explosion-proof mechanism (60) includes a first fixed valve disc (61) installed at both ends inside the valve cavity (20), a valve column (62) installed between the two first fixed valve discs (61), and a second fixed valve core disc (63) located at one end of the first fixed valve discs (61) that is far apart from each other and installed inside the valve cavity (20). The valve stem (62) has a balance telescopic rod (621) inserted at both ends inside. The actuating end of the balance telescopic rod (621) is connected to a movable valve core (622). The movable valve core (622) is located between the first fixed valve disc (61) and the second fixed valve core disc (63) at the same end.

2. The hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, The balance telescopic rod (621) includes a section rod (6211) inserted into one end of the valve column (62) and a piston rod (6212) inserted into the housing of the section rod (6211). One end of the piston rod (6212) extends into the interior of the section rod (6211) and is slidably connected to the inner wall of the section rod (6211). The other end of the piston rod (6212) passes through the first fixed valve disc (61) and is connected to the movable valve core (622).

3. The hydraulic dual-line explosion-proof valve according to claim 2, characterized in that, The balance telescopic rod (621) also includes a first pipe (6214) installed at one end of the housing of the section rod (6211), and the end of the first pipe (6214) away from the section rod (6211) extends to the outside of the valve column (62) between the two first fixed valve discs (61).

4. A hydraulic dual-line explosion-proof valve according to claim 3, characterized in that, The balance telescopic rod (621) also includes a second pipe (6213) installed at the end of the rod (6211) away from the first pipe (6214), the second pipe (6213) passing through the first fixed valve disc (61) and the second fixed valve core disc (63).

5. A hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, A cavity (21) is provided between the first fixed valve disc (61) and the second fixed valve core disc (63) at the same end, and the cavity (21) is located on the cavity of the valve cavity (20).

6. A hydraulic dual-line explosion-proof valve according to claim 5, characterized in that, The concave cavity (21) has threaded sections (22) at both ends. The threaded sections (22) are located on the surface of the valve cavity (20). The valve cavity (20) is connected to the first fixed valve disc (61) and the second fixed valve core disc (63) through the threaded sections (22).

7. A hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, Both sides of the first fixed valve disc (61) and the second fixed valve core disc (63) are provided with a convex disc (611), and a sealing ring (612) is sleeved on the outside of the convex disc (611).

8. A hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, Both the first fixed valve disc (61) and the second fixed valve core disc (63) have through holes (613) on their housings, and the through holes (613) are arranged in a circular array around the axis of the disc.

9. A hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, The radius of the movable valve core (622) is equal to the radius of the cross-section of the valve cavity (20).

10. A hydraulic dual-line explosion-proof valve according to claim 1, characterized in that, The first fixed valve disc (61) and the second fixed valve core disc (63) are both provided with cross grooves (614), which are located at the axis of the first fixed valve disc (61) and the second fixed valve core disc (63).

Images