Flat gate valve with valve plate position indication function

Abstract

The present application belongs to the technical field of flat gate valve, and discloses a flat gate valve with valve plate position indicating function, which comprises a valve seat, a valve cavity is formed in the inside of the valve seat, an end cover is arranged on the top of the valve seat, an annular receiving groove is formed on the top of the end cover, a fixing sleeve is fixed on the top of the end cover, the bottom of the fixing sleeve penetrates to the bottom of the end cover, and an adjusting device is arranged in the inside of the fixing sleeve. The position of the valve plate in the inside of the valve seat can be obtained by changing the scale value corresponding to the top of the screw sleeve of the scale bar. When the pressure in the inside of the butt joint pipe connected with the drainage port at one end of the valve seat rises after the inside of the valve seat is closed, the feedback device can be triggered to control the movement of the mechanism in the inside of the adjusting device to press down the valve plate, so that the inside of the valve seat is conducted, the damage of the sealing part in the inside of the valve seat caused by the pressure rise in the inside of the butt joint pipe can be avoided, the pipe explosion phenomenon can be prevented, and the buzzer can alarm.

Description

Technical Field

[0001] This invention relates to the field of flat gate valve technology, and more particularly to a flat gate valve with a valve plate position indication function. Background Technology

[0002] Flat gate valves, as components used to control the on / off state and flow rate of pipeline systems, are widely used in many fields such as petroleum, natural gas, and water conservancy.

[0003] In actual use, the valve plate and valve seat of a flat gate valve are connected by a sealed sliding connection. The valve plate can control the opening and closing of the water flow channel in the valve seat. When the valve seat is in the cut-off state, when the pressure in the pipeline at one end of the valve seat rises to the maximum value, it is easy to damage the seal between the valve seat and the valve plate. In severe cases, pipe bursting may also occur. Furthermore, the valve plate position cannot be accurately determined when adjusting the valve plate, and it cannot raise an alarm when the pressure in the pipeline rises. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a flat gate valve with valve plate position indication function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flat gate valve with valve plate position indication function, including a valve seat, a valve cavity inside the valve seat, an end cover on the top of the valve seat, an annular receiving groove on the top of the end cover, a fixing sleeve fixed on the top of the end cover, the bottom of the fixing sleeve penetrating to the bottom of the end cover, an adjustment device inside the fixing sleeve, a feedback device inside the valve seat located on one side of the valve cavity, connecting pipes communicating with the inside of the valve cavity fixed on both sides of the valve seat, a valve plate slidingly sealing between the inner walls of the valve cavity, and a through-hole penetrating to the other side on one side of the valve plate;

[0006] A buzzer is provided on the front side of the valve seat, an annular cavity is provided inside the fixing sleeve, an annular stepped cavity is provided outside the annular cavity inside the fixing sleeve, and a cleaning component is provided on the bottom surface of the annular stepped cavity.

[0007] Preferably, multiple openings are equidistantly provided on one side of the inner wall of the annular cavity near the top edge, and each opening penetrates into the interior of the fixed sleeve. Multiple filter holes are equidistantly provided on one side of the inner wall of the annular trapezoidal cavity, and each filter hole penetrates into the interior of the annular cavity.

[0008] Preferably, the cleaning component includes an annular ring, which is rotatably mounted on the annular ladder cavity and located in the middle of the annular ladder cavity. Multiple inclined blades are fixed at equal intervals along the circumferential direction on the outer surface of the annular ring, and one end of each of the multiple inclined blades extends to the bottom of the annular ladder cavity.

[0009] Preferably, the top of the annular ring has a temporary storage port extending to the bottom, and a scraper is fixed to the top of the annular ring. One side of the scraper is in contact with the inner wall of one side of the annular ladder cavity and is located on one side of multiple filter holes. The inside of the fixed sleeve has a rectangular opening at the bottom of the annular ring, which is opposite to the temporary storage port. A discharge channel is provided at the bottom of the rectangular opening, and one end of the discharge channel extends to the outside of the fixed sleeve.

[0010] Preferably, the adjusting device includes a threaded sleeve, which is rotatably disposed between the inner walls of the fixed sleeve. The top of the threaded sleeve extends above the fixed sleeve. A handwheel is fixed to the outer surface of the threaded sleeve near the top. A threaded rod is threaded between the inner walls of the threaded sleeve. A scale bar is provided on the outer surface of the threaded rod near the top edge. The top of the threaded rod extends above the threaded sleeve.

[0011] Preferably, a reciprocating cavity is provided inside the threaded rod near the bottom end. A limit ring is fixed between the inner walls of the reciprocating cavity near the top edge. A piston plate is slidably and sealingly arranged between the inner walls of the reciprocating cavity below the limit ring. A connecting rod is fixed to the bottom of the piston plate. The bottom of the connecting rod slides through to the bottom of the threaded rod and extends into the valve cavity to be rotatably connected to the top of the valve plate. A sealing ring is provided between the inner walls of the fixed sleeve near the bottom edge. The inner wall of the sealing ring is slidably and sealingly fitted with the outer surface of the connecting rod.

[0012] Preferably, a sealing sleeve is provided on the outer surface of the threaded rod near the bottom edge, and an annular groove is provided on the outer surface of the sealing sleeve near the bottom edge. Multiple throttling holes are provided at equal intervals on the inner walls of the reciprocating cavity near the top edge, and one end of each of the multiple throttling holes extends into the annular groove. Normally open buttons are fixed on the inner bottom surface of the reciprocating cavity near both sides.

[0013] Preferably, the feedback device includes a conical block, an adjustment chamber is provided on one side of the inner wall of the valve cavity, and a flow outlet is provided on the other side of the inner wall of the valve cavity. One end of the flow outlet extends into the valve seat and is connected to the interior of one of the connecting pipes. The flow outlet is opposite to the adjustment chamber. A side opening extending to the other side is provided on one side of the valve plate near the bottom edge.

[0014] Preferably, a conical ring is fixed between the inner walls of the adjustment cavity, a conical block is located inside the adjustment cavity, the conical surface of the conical block is sealed and fitted with one side of the conical surface of the conical ring, a spring is fixed to one end of the conical block, and one end of the spring is fixed to the inner wall of the adjustment cavity.

[0015] Preferably, the inner walls on both sides of the regulating cavity are provided with bent flow channels near one edge, one end of each bent flow channel extends to the top of the valve seat, and the bottom of the end cover is provided with bridging channels near both sides, the bottom of each bridging channel is connected to one end of the bent flow channel, and the other end of each bridging channel extends to the bottom of the annular trapezoidal cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, the position of the valve plate inside the valve seat can be determined by changing the scale value corresponding to the top of the scale bar and the threaded sleeve. The valve plate is pressed down by controlling the movement of the internal mechanism of the regulating device through the feedback device, so that the internal conduction of the valve seat is made open. This avoids damage to the internal sealing parts of the valve seat caused by the pressure rise inside the connecting pipe, and can also prevent pipe bursting. Before triggering the movement of the internal mechanism of the regulating device, the liquid supplied to the reciprocating chamber is filtered and cleaned by the cleaning component, and the dirt generated after cleaning is discharged, which can prevent contaminants from contaminating the internal mechanism of the regulating device.

[0018] 2. When the regulating device of the present invention is working, when the valve seat needs to be closed, the handwheel is turned to drive the threaded sleeve to rotate synchronously, so that the threaded rod slides upward. When the threaded rod slides upward, it will drive the valve plate to slide upward into the valve cavity. When it slides to the point where the port is misaligned with the inside of the two connecting pipes, the valve seat is in the cut-off state.

[0019] 3. When the feedback device in this invention is working, the pressure on one side of the valve seat increases and acts on one end of the conical block. When the pressure increases to the maximum clamping force of the spring on the conical block, the conical block can be pushed towards the conical ring. At this time, the liquid can enter the bending flow channel through the regulating chamber and finally flow into the reciprocating chamber through the throttling orifice, pushing the piston plate downward into the reciprocating chamber. At this time, the connecting rod and the valve plate will slide downward, so that the port on the valve plate is connected to the connecting pipe. At this time, the valve seat can be opened to conduct and prevent the pressure on one side of the valve seat from continuing to rise.

[0020] 4. When the cleaning component of the present invention is working, the rotating ring can drive the scraper to slide along the inner wall of the annular ladder cavity, scraping off the dirt generated by the filter holes. The scraped dirt will be deposited downwards above the ring. During the rotation of the ring, whenever the temporary storage port slides above the rectangular opening, the dirt can enter the rectangular opening from the temporary storage port and then be discharged from the drain channel. Attached Figure Description

[0021] Figure 1 This invention provides a front-view three-dimensional structural diagram of a flat gate valve with valve plate position indication function;

[0022] Figure 2 This invention provides a side sectional perspective view of a flat gate valve with valve plate position indication function.

[0023] Figure 3 This invention provides a three-dimensional cross-sectional view of the other side of a flat gate valve with valve plate position indication function.

[0024] Figure 4This invention provides a cross-sectional perspective view of the end cap and fixing sleeve of a flat gate valve with valve plate position indication function.

[0025] Figure 5 This invention provides a partial cross-sectional three-dimensional structural diagram of the valve seat in a flat gate valve with valve plate position indication function;

[0026] Figure 6 This invention provides a sectional perspective view of the internal structure of the end cover and fixing sleeve of a flat gate valve with valve plate position indication function;

[0027] Figure 7 This invention provides a partial cross-sectional three-dimensional structural diagram of the threaded rod in a flat gate valve with valve plate position indication function;

[0028] Figure 8 For the present invention Figure 2 A magnified view of a portion of point A in the middle;

[0029] Figure 9 For the present invention Figure 2 A magnified view of a portion of point B in the middle;

[0030] Figure 10 For the present invention Figure 6 A magnified view of a portion of point C.

[0031] In the diagram: 1. Valve seat; 2. Connecting pipe; 3. End cap; 4. Fixing sleeve; 5. Annular receiving groove; 6. Handwheel; 7. Threaded rod; 8. Scale bar; 9. Buzzer; 10. Threaded sleeve; 11. Valve cavity; 12. Connecting rod; 13. Sealing ring; 14. Valve plate; 15. Through port; 16. Side port; 17. Bridging channel; 18. Bent flow channel; 19. Drain flow channel; 20. Adjusting chamber; 21. Reciprocating... 21. Cavity; 22. Piston plate; 23. Limiting ring; 24. Throttling orifice; 25. Sealing sleeve; 26. Annular groove; 27. Normally open button; 28. Annular cavity; 29. ​​Opening; 30. Annular trapezoidal cavity; 31. Filter hole; 32. Annular ring; 33. Inclined blade; 34. Scraper; 35. Temporary storage port; 36. Rectangular port; 37. Conical ring; 38. Conical block; 39. Spring; 40. Drainage port. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-10The present invention provides a technical solution: a flat gate valve with valve plate position indication function, including a valve seat 1, a valve cavity 11 is opened inside the valve seat 1, an end cover 3 is provided on the top of the valve seat 1, an annular receiving groove 5 is opened on the top of the end cover 3, a fixing sleeve 4 is fixed on the top of the end cover 3, the bottom of the fixing sleeve 4 extends to the bottom of the end cover 3, an adjustment device is provided inside the fixing sleeve 4, a feedback device is provided inside the valve seat 1 on one side of the valve cavity 11, a connecting pipe 2 communicating with the inside of the valve cavity 11 is fixed on both sides of the valve seat 1, a valve plate 14 is slidably sealed between the inner walls of the valve cavity 11, and a through port 15 extending to the other side is opened on one side of the valve plate 14;

[0034] A buzzer 9 is provided on the front side of the valve seat 1. An annular cavity 28 is provided inside the fixed sleeve 4. An annular trapezoidal cavity 30 is provided outside the annular cavity 28 inside the fixed sleeve 4. A cleaning component is provided on the bottom surface of the annular trapezoidal cavity 30. Multiple openings 29 are provided at equal intervals on one side of the inner wall of the annular cavity 28 near the top edge. All openings 29 penetrate into the interior of the fixed sleeve 4. Multiple filter holes 31 are provided at equal intervals on one side of the inner wall of the annular trapezoidal cavity 30. All filter holes 31 penetrate into the interior of the annular cavity 28.

[0035] The effect achieved is as follows: by rotating the handwheel 6, the threaded sleeve 10 is rotated, thereby driving the threaded rod 7 inside the threaded sleeve 10 to move up and down, which lifts and pulls the valve plate 14 up and down, controlling the opening and closing inside the valve seat 1. When the threaded rod 7 moves up and down, the position of the valve plate 14 inside the valve seat 1 can be determined by the change of the scale value corresponding to the horizontal scale value of the top of the threaded sleeve 10 on the scale bar 8. When the valve plate 14 seals the inside of the valve seat 1, when the pressure inside the connecting pipe 2, which is connected to the drain port 40 at one end of the valve seat 1, increases, the feedback device can be triggered to control the movement of the internal mechanism of the regulating device to press down the valve plate 14, so that the inside of the valve seat 1 is open, avoiding damage to the sealing part inside the valve seat 1 after the pressure inside the connecting pipe 2 increases, and preventing pipe bursting. Before triggering the movement of the internal mechanism of the regulating device, the liquid supplied to the reciprocating chamber 21 is filtered and cleaned by the cleaning component, and the dirt generated after cleaning is discharged, which can prevent contaminants from contaminating the internal mechanism of the regulating device and increasing the resistance during mechanical transmission.

[0036] like Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 8 and Figure 10As shown, the cleaning assembly includes an annular ring 32, which is rotatably mounted on the annular ladder cavity 30 and located in the middle of the annular ladder cavity 30. Multiple inclined blades 33 are fixed at equal intervals along the circumferential direction on the outer surface of the annular ring 32. One end of each of the multiple inclined blades 33 extends to the bottom of the annular ladder cavity 30. A temporary storage port 35 extending through to the bottom is opened at the top of the annular ring 32. A scraper 34 is fixed at the top of the annular ring 32. One side of the scraper 34 is in contact with the inner wall of one side of the annular ladder cavity 30 and is located on one side of multiple filter holes 31. A rectangular opening 36 is opened at the bottom of the annular ring 32 inside the fixing sleeve 4. The rectangular opening 36 is opposite to the temporary storage port 35. A drain channel 19 is opened at the bottom of the rectangular opening 36. One end of the drain channel 19 extends through to the outside of the fixing sleeve 4.

[0037] The effect is that after the liquid flows into the annular stepped cavity 30 from the bridging channel 17, it will impact the inclined blades 33 as it flows from bottom to top inside the annular stepped cavity 30, generating a lateral pushing force on the inclined blades 33, which in turn causes the annular ring 32 to rotate. When the annular ring 32 rotates, it can drive the scraper 34 to slide along the inner wall of the annular stepped cavity 30, scraping off the dirt produced by the filter holes 31. The scraped dirt will be deposited downwards above the annular ring 32. During the rotation of the annular ring 32, whenever the temporary storage port 35 slides above the rectangular port 36, the dirt can enter the rectangular port 36 from the temporary storage port 35 and then be discharged from the drain channel 19, completing the removal of dirt.

[0038] like Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, the adjusting device includes a threaded sleeve 10, which is rotatably disposed between the inner walls of the fixed sleeve 4. The top of the threaded sleeve 10 extends above the fixed sleeve 4. A handwheel 6 is fixed to the outer surface of the threaded sleeve 10 near the top. A threaded rod 7 is threaded between the inner walls of the threaded sleeve 10. A scale bar 8 is provided on the outer surface of the threaded rod 7 near the top edge. The top of the threaded rod 7 extends above the threaded sleeve 10. A reciprocating cavity 21 is opened inside the threaded rod 7 near the bottom end. A limit ring 23 is fixed between the inner walls of the reciprocating cavity 21 near the top edge. A piston plate 22 is slidably and sealingly disposed between the inner walls of the reciprocating cavity 21 below the limit ring 23. A connecting rod is fixed to the bottom of the piston plate 22. The bottom of the rod 12 slides through to the bottom of the threaded rod 7 and extends into the valve cavity 11, where it is rotatably connected to the top of the valve plate 14. A sealing ring 13 is provided between the inner walls of the fixed sleeve 4 near the bottom edge. The inner wall of the sealing ring 13 slides and seals against the outer surface of the connecting rod 12. A sealing sleeve 25 is provided on the outer surface of the threaded rod 7 near the bottom edge. An annular groove 26 is provided on the outer surface of the sealing sleeve 25 near the bottom edge. Multiple throttling holes 24 are provided at equal intervals between the inner walls of the reciprocating cavity 21 near the top edge. One end of each of the multiple throttling holes 24 extends into the annular groove 26. A normally open button 27 is fixed on the inner bottom surface of the reciprocating cavity 21 near both sides.

[0039] The effect achieved is that when the valve plate 14 is located below the inside of the valve cavity 11, the port 15 is connected to the connecting pipes 2 on both sides of the valve seat 1. At this time, the annular groove 26 is located below the opening 29, and the opening 29 is closed by the sealing sleeve 25. The top of the piston plate 22 and the bottom of the limiting ring 23 are in contact with each other. At this time, the valve seat 1 is in the open state. When the valve seat 1 needs to be closed, the handwheel 6 is turned to drive the threaded sleeve 10 to rotate synchronously, so that the threaded rod 7 slides upward. When the threaded rod 7 slides upward, it will drive the valve plate 14 to slide upward inside the valve cavity 11. When it slides to the point where the port 15 is misaligned with the inside of the two connecting pipes 2, the valve seat 1 is in the cut-off state. At this time, the annular groove 26 slides to the side opposite to the opening 29, and the side port 16 slides to one end of the drain port 40.

[0040] like Figure 2 , Figure 3 , Figure 5 and Figure 9As shown, the feedback device includes a conical block 38. An adjustment chamber 20 is formed on one inner wall of the valve chamber 11, and a drain port 40 is formed on the other inner wall of the valve chamber 11. One end of the drain port 40 extends into the valve seat 1 and communicates with the interior of one of the connecting pipes 2. The drain port 40 is opposite to the adjustment chamber 20. A side opening 16 extending to the other side is formed near the bottom edge of one side of the valve plate 14. A conical ring 37 is fixed between the inner walls of the adjustment chamber 20. The conical block 38 is located inside the adjustment chamber 20, and the conical surface of the conical block 38 is aligned with the conical ring. One side of the cone surface of 37 is sealed and fitted. One end of the cone block 38 is fixed with a spring 39. One end of the spring 39 is fixed on the inner wall of the regulating cavity 20. Both sides of the inner wall of the regulating cavity 20 are provided with bent flow channels 18 near one edge. One end of each of the two bent flow channels 18 extends to the top of the valve seat 1. The bottom of the end cover 3 is provided with bridging channels 17 near both sides. The bottom of each of the two bridging channels 17 is connected to one end of the bent flow channel 18. The other end of each of the two bridging channels 17 extends to the bottom of the annular ladder cavity 30.

[0041] The effect achieved is as follows: since the connecting pipes 2 on both sides of the valve seat 1 are connected to the delivery pipe and output pipe of the external pipeline respectively during use, after the valve seat 1 is closed, the connecting pipe 2 connected to the external delivery pipe will still have pressure inside, while the connecting pipe 2 connected to the external output pipe will have zero pressure inside. When the pressure inside the external delivery pipe rises, it will cause the pressure inside the connecting pipe 2 connected to it to rise. At this time, the pressure on one side of the valve seat 1 increases, and the increased pressure will act on one end of the conical block 38. When the pressure rises to the maximum clamping force of the spring 39 on the conical block 38, the conical block 38 can be pushed towards the conical ring 37. At this time, the liquid can enter the bent flow channel 18 through the regulating chamber 20, and then flow out from the bend. The flow channel 18 enters the bottom of the annular stepped cavity 30 through the bridging channel 17. Inside the annular stepped cavity 30, the liquid enters the annular cavity 28 through the filter hole 31, and then flows into the annular groove 26 through the opening 29. Inside the annular groove 26, it flows into the reciprocating cavity 21 through the throttling hole 24, pushing the piston plate 22 downward into the reciprocating cavity 21. At this time, it will drive the connecting rod 12 and the valve plate 14 to slide downward, so that the through port 15 on the valve plate 14 is connected to the connecting pipe 2. At this time, the valve seat 1 can be opened to conduct, preventing the pressure on the side of the valve seat 1 from continuing to rise. When the piston plate 22 slides to the bottom surface inside the reciprocating cavity 21, it will press the normally open button 27 to make the buzzer 9 sound an alarm, reminding the operator to check the equipment operation.

[0042] Working principle: When using this device, rotating the handwheel 6 drives the threaded sleeve 10 to rotate, thereby driving the threaded rod 7 inside the threaded sleeve 10 to move up and down, causing it to lift the valve plate 14 up and down, controlling the opening and closing inside the valve seat 1. As the threaded rod 7 moves up and down, the position of the valve plate 14 inside the valve seat 1 can be determined by the change in the scale value corresponding to the horizontal position of the top of the threaded sleeve 10 on the scale bar 8. When the valve plate 14 is located below the valve cavity 11, the through port 15 is connected to the connecting pipes 2 on both sides of the valve seat 1. At this time, the annular groove 26 is located below the opening 29, which is closed by the sealing sleeve 25. The top of the piston plate 22 is in contact with the bottom of the limiting ring 23, and the valve seat 1 is in the open state. To close the valve seat 1, rotating the handwheel 6 drives the threaded rod 7 to rotate. The threaded sleeve 10 rotates synchronously, causing the threaded rod 7 to slide upwards. As the threaded rod 7 slides upwards, it drives the valve plate 14 to slide upwards into the valve cavity 11. When the through-hole 15 is misaligned with the two connecting pipes 2, the valve seat 1 is in a cut-off state. At this time, the annular groove 26 slides to the side opposite to the opening 29, and the side opening 16 slides to one end of the drain port 40. Since the connecting pipes 2 on both sides of the valve seat 1 are connected to the external pipeline's delivery and output pipes respectively during use, after the valve seat 1 is closed, the connecting pipe 2 connected to the external delivery pipe will still have pressure, while the connecting pipe 2 connected to the external output pipe will have zero pressure. When the pressure inside the external delivery pipe rises, it will increase the pressure inside the connecting pipe 2 connected to it. At this time, the pressure on one side of the valve seat 1 increases. When the pressure increases, it acts on one end of the conical block 38. When the pressure rises to the maximum clamping force of the spring 39 on the conical block 38, the conical block 38 can be pushed towards the conical ring 37. At this time, the liquid can enter the bent flow channel 18 through the regulating cavity 20, and then enter the bottom of the annular stepped cavity 30 through the bridging channel 17 from the bent flow channel 18. Inside the annular stepped cavity 30, the liquid enters the annular cavity 28 through the filter hole 31, and then flows into the annular groove 26 from the opening 29. Inside the annular groove 26, it flows into the reciprocating cavity 21 through the throttling hole 24, pushing the piston plate 22 downward into the reciprocating cavity 21. At this time, it will drive the connecting rod 12 and the valve plate 14 to slide downward, so that the through port 15 on the valve plate 14 is connected to the connecting pipe 2. At this time, the valve seat 1 can be opened to conduct the flow and avoid the flow. As the pressure on the valve-free seat 1 side continues to rise, and the piston plate 22 slides to the bottom surface inside the reciprocating chamber 21, it presses the normally open button 27, causing the buzzer 9 to sound an alarm, reminding the operator to check the equipment operation. After the liquid flows into the annular ladder chamber 30 from the bridging channel 17, it impacts the inclined blades 33 as it flows upward from the bottom inside the annular ladder chamber 30, generating a lateral pushing force on the inclined blades 33, which in turn causes the annular ring 32 to rotate. When the annular ring 32 rotates, it can drive the scraper 34 to slide along the inner wall of the annular ladder chamber 30, scraping away the dirt produced by the filter holes 31. The scraped dirt will be deposited downward above the annular ring 32. During the rotation of the annular ring 32, whenever the temporary storage port 35 slides above the rectangular port 36...The stains can then enter the rectangular opening 36 through the temporary storage opening 35, and then be discharged through the drain channel 19, completing the removal of the stains.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flat gate valve with valve plate position indication function, characterized in that, The valve includes a valve seat (1), which has a valve cavity (11) inside. The valve seat (1) has an end cap (3) on top. The end cap (3) has an annular storage groove (5) on top. The end cap (3) has a fixed sleeve (4) on top. The bottom of the fixed sleeve (4) extends to the bottom of the end cap (3). The fixed sleeve (4) has an adjustment device inside. The valve seat (1) has a feedback device on one side of the valve cavity (11). Both sides of the valve seat (1) have connecting pipes (2) that connect to the inside of the valve cavity (11). The valve plate (14) is slidably sealed between the inner walls of the valve cavity (11). The valve plate (14) has a through-hole (15) on one side that extends to the other side. A buzzer (9) is provided on the front side of the valve seat (1), an annular cavity (28) is provided inside the fixed sleeve (4), an annular stepped cavity (30) is provided inside the fixed sleeve (4) on the outside of the annular cavity (28), and a cleaning component is provided on the bottom surface of the annular stepped cavity (30). The feedback device includes a conical block (38). An adjustment cavity (20) is formed on one side of the inner wall of the valve cavity (11), and a drain port (40) is formed on the other side of the inner wall of the valve cavity (11). One end of the drain port (40) extends into the valve seat (1) and communicates with the interior of one of the connecting pipes (2). The drain port (40) is opposite to the adjustment cavity (20). A side opening (16) extending to the other side is formed near the bottom edge of one side of the valve plate (14). A conical ring (37) is fixed between the inner walls of the adjustment cavity (20). The conical block (38) is located inside the adjustment cavity (20). The conical surface of the conical block (38)... The conical block (38) is sealed to one side of the conical ring (37). One end of the conical block (38) is fixed with a spring (39). One end of the spring (39) is fixed to the inner wall of the regulating cavity (20). The inner walls of both sides of the regulating cavity (20) are provided with bent flow channels (18) near one edge. One end of each of the two bent flow channels (18) extends to the top of the valve seat (1). The bottom of the end cover (3) is provided with bridging channels (17) near both sides. The bottom of each of the two bridging channels (17) is connected to one end of the bent flow channel (18). The other end of each of the two bridging channels (17) extends to the bottom of the annular ladder cavity (30).

2. A flat gate valve with valve plate position indication function according to claim 1, characterized in that: The inner wall of one side of the annular cavity (28) is provided with multiple openings (29) at equal intervals near the top edge, and the multiple openings (29) all penetrate into the interior of the fixed sleeve (4). The inner wall of one side of the annular trapezoidal cavity (30) is provided with multiple filter holes (31) at equal intervals, and the multiple filter holes (31) all penetrate into the interior of the annular cavity (28).

3. A flat gate valve with valve plate position indication function according to claim 2, characterized in that: The cleaning component includes an annular ring (32), which is rotatably disposed on the annular ladder cavity (30) and located in the middle part of the annular ladder cavity (30). Multiple inclined blades (33) are fixed at equal intervals along the circumferential direction on the outer surface of the annular ring (32), and one end of each of the multiple inclined blades (33) extends to the bottom of the annular ladder cavity (30).

4. A flat gate valve with valve plate position indication function according to claim 3, characterized in that: The top of the annular ring (32) is provided with a temporary storage port (35) extending to the bottom. A scraper (34) is fixed on the top of the annular ring (32). One side of the scraper (34) is in contact with the inner wall of one side of the annular ladder cavity (30) and is located on one side of multiple filter holes (31). The inside of the fixed sleeve (4) is provided with a rectangular opening (36) at the bottom of the annular ring (32). The rectangular opening (36) is opposite to the temporary storage port (35). A drain channel (19) is provided at the bottom of the rectangular opening (36). One end of the drain channel (19) extends to the outside of the fixed sleeve (4).

5. A flat gate valve with valve plate position indication function according to claim 4, characterized in that: The adjusting device includes a threaded sleeve (10), which is rotatably disposed between the inner walls of the fixed sleeve (4). The top of the threaded sleeve (10) extends above the fixed sleeve (4). A handwheel (6) is fixed to the outer surface of the threaded sleeve (10) near the top. A threaded rod (7) is threaded between the inner walls of the threaded sleeve (10). A scale bar (8) is provided on the outer surface of the threaded rod (7) near the top edge. The top of the threaded rod (7) extends above the threaded sleeve (10).

6. A flat gate valve with valve plate position indication function according to claim 5, characterized in that: The threaded rod (7) has a reciprocating cavity (21) near the bottom. A limit ring (23) is fixed between the inner walls of the reciprocating cavity (21) near the top edge. A piston plate (22) is slidably sealed between the inner walls of the reciprocating cavity (21) below the limit ring (23). A connecting rod (12) is fixed at the bottom of the piston plate (22). The bottom of the connecting rod (12) slides through to the bottom of the threaded rod (7) and extends into the valve cavity (11) and is rotatably connected to the top of the valve plate (14). A sealing ring (13) is provided between the inner walls of the fixed sleeve (4) near the bottom edge. The inner wall of the sealing ring (13) slides and seals against the outer surface of the connecting rod (12).

7. A flat gate valve with valve plate position indication function according to claim 6, characterized in that: A sealing sleeve (25) is provided on the outer surface of the threaded rod (7) near the bottom edge. An annular groove (26) is provided on the outer surface of the sealing sleeve (25) near the bottom edge. Multiple throttling holes (24) are provided at equal intervals on the inner wall of the reciprocating cavity (21) near the top edge. One end of each of the multiple throttling holes (24) penetrates into the annular groove (26). A normally open button (27) is fixed on the inner bottom surface of the reciprocating cavity (21) near both sides.

Images