Explosion-proof gate valve

Abstract

The utility model discloses an explosion -proof gate valve, both ends of valve body are equipped with valve pipe, and the middle position of valve pipe top near valve body one end is equipped with support block, all is equipped with recess in support block, and all is equipped with spring in recess middle position, and another end of spring all is equipped with extrusion block, and the middle position of extrusion block top all is equipped with press block, and all is equipped with pressure -relief port on the inner wall of valve pipe corresponding to extrusion block, the middle position of valve body top is connected with valve bonnet through flange, and the outside of valve bonnet top is equipped with annular support plate, and the middle position of valve bonnet top is connected with valve rod through bearing, and the top of valve rod is equipped with valve wheel, and the middle position of both sides of valve wheel bottom all is equipped with limit rod. The utility model discloses through the pressure overexposure pressure -relief port and carry out pressure -relief, can improve its security, and can carry out limit fixing to valve wheel, prevent false touch.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof gate valve technology, specifically an explosion-proof gate valve. Background Technology

[0002] Explosion-proof gate valves are mainly used for diversion and flow direction control of media in flammable and explosive working conditions. Their core structure is a gate valve, which can be opened and closed by manually driving the gate to move vertically. They also have explosion-proof function to meet the needs of special working conditions and are widely used in flammable and explosive places such as petrochemical, coal chemical, and pharmaceutical industries.

[0003] In the existing technology, general explosion-proof gate valves cannot automatically relieve pressure when the internal pressure increases during use, which reduces their safety. Furthermore, after rotation, accidental activation may occur, causing the valve wheel to rotate and thus affecting its performance. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof gate valve to solve the problems of inconvenience in pressure relief and prevention of accidental contact mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof gate valve, comprising a valve body and valve pipes, characterized in that: valve pipes are provided at both ends of the valve body, and a support block is provided at the middle position of the top of each valve pipe near one end of the valve body; each support block has a groove, and a spring is provided at the middle position of each groove; a pressing block is provided at the other end of each spring; a pressing block is provided at the middle position of the top of each pressing block; and a pressure relief port is provided on the inner wall of the valve pipe corresponding to each pressing block; a valve cover is connected to the middle position of the top of the valve body via a flange, and the outer surface of the top of the valve cover... The valve cover has an annular support plate on the side, and a valve stem is connected to the middle of the top of the valve cover via a bearing. A valve wheel is provided on the top of the valve stem, and a limit rod is provided at the middle of both sides of the bottom of the valve wheel. This allows excessive pressure to push the extrusion block into the groove and make the extrusion block touch the touch switch, which can promptly issue an alarm and allow some of the medium to be discharged through the pressure relief pipe. This can prevent excessive pressure from damaging the explosion-proof gate valve, thereby improving its safety and reliability. In use, the limit rod at the bottom of the valve wheel can be fixed to prevent the valve wheel from rotating accidentally due to external vibration or accidental contact.

[0006] As a further technical solution of this utility model, a pressure relief pipe is provided at the middle position of the bottom front of the support block, and a pipe groove is provided in the support block corresponding to one end of the pressure relief pipe, so that after the pressure relief port is exposed, the medium can flow out through the pressure relief pipe.

[0007] As a further technical solution of this utility model, the size of the extrusion block is consistent with that of the pressure relief port, and a filter screen is provided at the bottom of the pressure relief port so that the filter screen can allow the medium flowing in the pressure relief port to pass through, thereby preventing impurities from entering and affecting its normal use.

[0008] As a further technical solution of this utility model, a central block is provided at the middle position of the top of the groove, and a touch switch is provided at the middle position of the bottom of the central block, so that the touch switch on the central block can trigger an alarm and notify in time when it is touched.

[0009] As a further technical solution of this utility model, an L-shaped slider facing the inner wall of the groove is provided at the middle position on both sides of the top of the extrusion block, and a second sliding groove is provided on the inner wall of the groove corresponding to the L-shaped slider. The L-shaped slider is slidably connected to the corresponding second sliding groove, so that when the extrusion block moves, it can drive the L-shaped slider to move in the second sliding groove, which can limit and guide the movement of the extrusion block.

[0010] As a further technical solution of this utility model, the top of the annular support plate corresponding to the limiting rod is provided with an annular groove, and the bottom of the limiting rod is slidably connected to the groove, so that when the limiting rod rotates, it can drive the bottom to rotate in the groove, making its rotation more stable.

[0011] As a further technical solution of this utility model, an annular block is provided on the annular support plate on the inner side of the limiting rod, and threaded holes are uniformly provided in the middle position of the annular block, so that the threaded holes on the annular block are the same size as the screw, and can be used for connection and limiting.

[0012] As a further technical solution of this utility model, each of the corresponding threaded holes on the limiting rod is connected to a screw rod by a thread, and the other end of each screw rod is connected to the annular support plate by a threaded hole. Each screw rod on the inner side of the annular support plate is connected to a nut by a thread, so that the screw rod is screwed into the threaded hole of the corresponding annular block, and the nut is screwed onto the screw rod on the inner side of the annular support plate, which can limit and fix it.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When the pressure rises abnormally during the flow of the medium, the excessive pressure will push the squeezing block into the groove and squeeze the spring, which will make the squeezing block gradually approach the center block until the squeezing block touches the touch switch, which can promptly issue an alarm and allow some of the medium to be discharged through the pressure relief pipe. This can prevent excessive pressure from damaging the explosion-proof gate valve and improve its safety and reliability.

[0015] After the valve wheel finishes rotating, the screw can be rotated to screw it into the threaded hole of the annular block and fixed with a nut. This can fix the limiting rod, thereby restricting the rotation of the valve wheel and preventing accidental rotation of the valve wheel due to external vibration or accidental contact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main sectional view of the valve cover and annular support plate of this utility model.

[0018] Figure 3 This is a schematic diagram of the main sectional view of the valve pipe and support block of this utility model;

[0019] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0020] In the diagram: 1. Valve body; 2. Valve pipe; 3. Support block; 4. Pressure relief pipe; 5. Valve cover; 6. Annular support plate; 7. Limiting rod; 8. Valve stem; 9. Valve wheel; 10. Annular block; 11. Slide groove one; 12. Screw; 13. Center block; 14. Touch switch; 15. Slide groove two; 16. Groove; 17. Spring; 18. Filter screen; 19. Pressing block; 20. L-shaped slider; 21. Pressure relief port; 22. Pressing block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 An embodiment of this utility model is provided: an explosion-proof gate valve, including a valve body 1 and a valve pipe 2. Both ends of the valve body 1 are provided with valve pipes 2, and a support block 3 is provided at the middle position of the top of the valve pipe 2 near the end of the valve body 1. A pressure relief pipe 4 is provided at the middle position of the bottom front of the support block 3, and a pipe groove is provided in the support block 3 corresponding to one end of the pressure relief pipe 4. A groove 16 is provided in the support block 3, and a spring 17 is provided at the middle position of the groove 16. A pressing block 19 is provided at the other end of the spring 17. A pressing block 22 is provided at the middle position of the top of the pressing block 19, and a pressure relief port 21 is provided on the inner wall of the valve pipe 2 corresponding to the pressing block 19. A center block 13 is provided at the middle position of the top of the groove 16, and a touch switch 14 is provided at the middle position of the bottom of the center block 13.

[0023] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the valve pipes 2 at both ends of the valve body 1 are connected to the external medium flow pipes, allowing the medium to flow through the valve body 1 and valve pipes 2. When the medium flows normally in the valve pipe 2, the spring 17 is in its natural state, and the squeezing block 19 will not trigger the touch switch 14. However, when the pressure in the valve pipe 2 rises abnormally, the excessive pressure will push the squeezing block 19 into the groove 16, squeezing the spring 17. As the squeezing block 19 moves, the pressing block 22 gradually approaches the center block 13 until the squeezing block 19 touches the touch switch 14. After the touch switch 14 is triggered, it can be connected to an external alarm device or control system to issue an alarm in time, reminding the staff to pay attention to the abnormal pressure in the valve pipe 2. At the same time, when the pressure rises, some medium will enter the pipe groove through the pressure relief port 21 and then be discharged through the pressure relief pipe 4, thereby reducing the pressure in the valve pipe 2 and preventing excessive pressure from damaging the explosion-proof gate valve, thus improving its safety and reliability.

[0024] A valve cover 5 is connected to the middle position of the top of the valve body 1 via a flange. An annular support plate 6 is provided on the outer side of the top of the valve cover 5. A valve stem 8 is connected to the middle position of the top of the valve cover 5 via a bearing. A valve wheel 9 is provided on the top of the valve stem 8. A limit rod 7 is provided at the middle position of both sides of the bottom of the valve wheel 9. An annular groove 11 is provided on the top of the annular support plate 6 corresponding to the limit rod 7. The bottom of the limit rod 7 is slidably connected to the groove 11. An annular block 10 is provided on the annular support plate 6 inside the limit rod 7. Threaded holes are evenly provided in the middle position of the annular block 10. A screw 12 is threadedly connected to the corresponding threaded hole on the limit rod 7. The other end of the screw 12 is threadedly connected to the annular support plate 6 through the threaded hole. A nut is threadedly connected to the screw 12 inside the annular support plate 6.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the operator can rotate the valve wheel 9 to drive the valve stem 8 to rotate, allowing the medium to flow in the valve body 1 and valve pipe 2. When the valve wheel 9 rotates, it can drive the limit rod 7 to rotate together in the slide groove 11. After the rotation is finished, the operator can rotate the screw 12 to screw it into the threaded hole of the annular block 10 and fix it with a nut to limit the rotation of the limit rod 7, thereby restricting the rotation of the valve wheel 9 and preventing the valve wheel 9 from rotating accidentally due to external vibration or accidental contact.

[0026] The size of the compression block 19 is the same as that of the pressure relief port 21, and the bottom of the pressure relief port 21 is provided with a filter screen 18.

[0027] Specifically, such as Figure 3 and Figure 4As shown, when the extrusion block 19 is extruded, the medium can be filtered through the filter screen 18, which can effectively remove impurities in the medium and prevent impurities from causing blockage or damage to subsequent pipelines or equipment.

[0028] The middle positions on both sides of the top of the extrusion block 19 are provided with L-shaped sliders 20 facing the inner wall of the groove 16, and the inner wall of the groove 16 corresponding to the L-shaped sliders 20 is provided with a second groove 15, and the L-shaped sliders 20 are slidably connected to the corresponding second groove 15.

[0029] Specifically, such as Figure 3 and Figure 4 As shown, when the extrusion block 19 moves, it can drive the L-shaped slider 20 to slide in the second groove 15, which can guide the movement direction of the extrusion block 19 and prevent the extrusion block 19 from deviating or shaking during the movement.

[0030] Working principle: In use, the valve pipes 2 at both ends of the valve body 1 are connected to the external medium flow pipeline. Then, the operator rotates the valve wheel 9 to drive the valve stem 8 to rotate, allowing the medium to flow in the valve body 1 and valve pipe 2. When the valve wheel 9 rotates, it drives the limit rod 7 to rotate together in the slide groove 11. After rotation, the operator can rotate the screw 12 to screw it into the threaded hole of the annular block 10 and fix it with a nut to limit the rotation of the limit rod 7, thereby restricting the rotation of the valve wheel 9 and preventing accidental rotation of the valve wheel 9 due to external vibration or accidental contact. When the medium flows normally, the spring 17 is in its natural state, and the squeezing block 19 will not trigger the touch switch 14. However, when the pressure in the valve pipe 2 rises abnormally, the excessive pressure will push the squeezing block 19 to move into the groove 16. When the squeezing block 19 moves, it can drive the L-shaped slider 20 in the slide groove 15. The internal sliding mechanism guides the movement of the compression block 19, preventing it from shifting or wobbling during movement. Then, the compression spring 17 is compressed. As the compression block 19 moves, the pressing block 22 gradually approaches the center block 13 until the compression block 19 touches the touch switch 14. Once the touch switch 14 is triggered, it can be connected to an external alarm device or control system to issue an alarm, alerting staff to any abnormal pressure in the valve pipe 2. Simultaneously, when the pressure increases, some of the medium will enter the pipe groove through the pressure relief port 21 and then be discharged through the pressure relief pipe 4, thereby reducing the pressure in the valve pipe 2 and preventing damage to the explosion-proof gate valve due to excessive pressure. This improves the safety and reliability of its use. During compression by the compression block 19, the medium can be filtered through the filter screen 18, effectively removing impurities and preventing them from clogging or damaging subsequent pipelines or equipment.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An explosion-proof gate valve, comprising a valve body (1) and a valve pipe (2), characterized in that: The valve body (1) has valve tubes (2) at both ends, and a support block (3) is provided at the middle position of the top of the valve tube (2) near the valve body (1). The support block (3) has a groove (16) in the middle position of the groove (16), and a spring (17) is provided at the middle position of the groove (16). The other end of the spring (17) has a pressing block (19). The middle position of the top of the pressing block (19) has a pressing block (22). The inner wall of the valve tube (2) corresponding to the pressing block (19) has a pressure relief port (21). The valve cover (5) is connected to the middle position of the top of the valve body (1) through a flange. The outer side of the top of the valve cover (5) has an annular support plate (6). The middle position of the top of the valve cover (5) is connected to the valve stem (8) through a bearing. The top of the valve stem (8) has a valve wheel (9). The middle positions of the bottom sides of the valve wheel (9) have a limiting rod (7).

2. The explosion-proof gate valve according to claim 1, characterized in that: Each of the support blocks (3) has a pressure relief pipe (4) at the middle of the bottom front end, and each of the support blocks (3) has a pipe groove at one end of the pressure relief pipe (4).

3. The explosion-proof gate valve according to claim 1, characterized in that: The size of the compression block (19) is the same as that of the pressure relief port (21), and the bottom of the pressure relief port (21) is provided with a filter screen (18).

4. The explosion-proof gate valve according to claim 1, characterized in that: A center block (13) is provided at the middle position of the top of each groove (16), and a touch switch (14) is provided at the middle position of the bottom of the center block (13).

5. The explosion-proof gate valve according to claim 1, characterized in that: The top two sides of the extrusion block (19) are provided with L-shaped sliders (20) facing the inner wall of the groove (16), and the inner wall of the groove (16) corresponding to the L-shaped sliders (20) is provided with a second groove (15), and the L-shaped sliders (20) are slidably connected to the corresponding second groove (15).

6. The explosion-proof gate valve according to claim 1, characterized in that: The top of the annular support plate (6) corresponding to the limiting rod (7) is provided with an annular groove (11), and the bottom of the limiting rod (7) is slidably connected to the groove (11).

7. The explosion-proof gate valve according to claim 1, characterized in that: The annular support plate (6) inside the limiting rod (7) is provided with an annular block (10), and the annular block (10) is provided with threaded holes evenly in the middle position.

8. The explosion-proof gate valve according to claim 1, characterized in that: The corresponding threaded holes on the limiting rod (7) are all connected to screw rods (12) by threads, and the other end of each screw rod (12) is connected to the annular support plate (6) by threads through threaded holes. Nuts are connected to the screw rods (12) on the inner side of the annular support plate (6) by threads.

Images