Flat gate valve with flow guide hole

Abstract

The utility model relates to the field of flat gate valves, in particular to a flat gate valve with a flow guide hole, which comprises a valve body, two sides of the valve body are respectively and fixedly communicated with a first through pipe and a second through pipe, and sealing mechanisms are arranged in the first through pipe and the second through pipe. The valve rod moves in the threaded sleeve, the valve rod moves to drive the valve plate to move, the valve plate makes contact with the sealing ring, the sealing ring is extruded to cause deformation of the spring, the spring reversely extrudes the sealing ring due to the deformation recovery capacity, and then the leakproofness of the sealing ring and the valve plate can be improved; the problems that when an existing flat gate valve with flow guide holes is used, when fluid pressure is low, a metal sealing face of the flat gate valve can not achieve a satisfactory sealing effect due to insufficient sealing force possibly, and when the fluid pressure is high, the metal sealing face can be abraded too much due to frequent opening and closing of a gate plate, and the sealing effect is poor are solved. And the sealing performance and the service life of the valve are influenced.

Description

Technical Field

[0001] The utility model relates to the field of flat gate valves, in particular to a flat gate valve with a guide hole. Background Art

[0002] The flat gate valve with guide hole is a special gate valve, which is characterized by the guide hole designed on the valve plate. This design enables the valve to adjust the flow rate during the closing process. It is widely used in many fields such as petroleum, chemical industry, metallurgy, and electric power.

[0003] The existing flat gate valve with guide holes also has some shortcomings when in use. When the fluid pressure is low, the metal sealing surface of the flat gate valve may be difficult to achieve a satisfactory sealing effect due to insufficient sealing force, which may cause fluid leakage and affect the normal operation of the system. When the fluid pressure is high, frequent opening and closing of the gate may cause excessive wear of the metal sealing surface, thereby affecting the sealing performance and service life of the valve. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a flat gate valve with a guide hole.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a flat gate valve with a guide hole, comprising a valve body, two sides of the valve body are respectively fixedly connected with a first through pipe and a second through pipe, the first through pipe and the second through pipe respectively penetrate into the interior of the valve body, the top of the valve body is movably connected with a valve cover, the bottom of the valve cover and the top of the valve body are both fixedly connected with a connecting plate, the two connecting plates are fixedly connected by bolts, the top of the valve cover is fixedly connected with a docking rod, the interior of the docking rod is fixedly connected with a screw sleeve, the interior of the screw sleeve is threadedly connected with a valve stem, one end of the valve stem penetrates into the interior of the valve cover, the bottom of the valve stem is rotatably connected with a valve plate, the interior of the valve plate is provided with a guide hole body, the interior of the valve body is respectively provided with a first cavity and a second cavity, and the interiors of the first through pipe and the second through pipe are both provided with a sealing mechanism;

[0006] The sealing mechanism includes a sealing ring, which is fixedly connected to one side of the inner cavity of the first through tube and the second through tube respectively. The inner cavities of the first through tube and the second through tube are both provided with sealing grooves. A spring is fixedly connected to one side of the inner wall of the sealing groove, and the other end of the spring is fixedly connected to one side of the sealing ring. A fixed rod and a movable rod are arranged inside the spring, one end of the fixed rod is fixedly connected to one side of the inner wall of the sealing groove, and the other end of the fixed rod is slidably connected to the movable rod, and the other end of the movable rod is fixedly connected to one side of the sealing ring.

[0007] Preferably, a hand wheel is fixedly connected to the top of the valve stem, a sealed bearing is fixedly connected to the top of the inner cavity of the docking rod, and the valve stem is rotatably connected to the inside of the sealed bearing.

[0008] Preferably, one end of the movable rod is fixedly connected to a limiting block, the diameter of the limiting block is larger than the diameter of the movable rod, and the limiting block is slidably connected to the inside of the fixed rod.

[0009] Preferably, both sides of the inner cavity of the valve cover are fixedly connected with fixed blocks, one side of the fixed block is fixedly connected with a connecting rod, the bottom of the connecting rod is fixedly connected with a scraper, and the surface of the scraper is in contact with the upper surface of the valve plate.

[0010] Preferably, a cleaning mechanism is provided inside the second cavity, and the cleaning mechanism includes a water outlet pipe, which is fixedly connected to the bottom of the inner cavity of the valve body, and one side of the bottom of the valve body surface is fixedly connected to a water inlet pipe, and one side of the water outlet pipe and the water inlet pipe are fixedly connected to a control valve, and cleaning brushes are fixedly connected to both sides of the top of the second cavity, and the surface of the cleaning brush fits with the lower surface of the valve plate.

[0011] Preferably, a filter screen is fixedly connected to the interior of the guide hole body, and the filter screen is made of stainless steel.

[0012] Preferably, both sides of the second cavity are fixedly connected with a fixing seat, the interior of the fixing seat is fixedly connected with a rotating shaft, the surface of the rotating shaft is rotatably connected with a pulley, and the surface of the pulley is in contact with the surface of the valve plate.

[0013] The utility model is beneficial in that:

[0014] The utility model rotates a hand wheel, and the rotation of the hand wheel drives the valve stem to rotate, and at the same time the valve stem moves inside the screw sleeve, and the movement of the valve stem drives the valve plate to move. When the valve is in a fully closed state, the position of the valve plate is fixed, the valve plate is in contact with the sealing ring, the sealing ring is squeezed and causes the spring to deform. Due to the ability of the spring to recover the deformation, the sealing ring is reversely squeezed, thereby increasing the airtightness of the sealing ring and the valve plate, solving the problem that when the existing flat gate valve with a guide hole is in use and the fluid pressure is low, the metal sealing surface of the flat gate valve may be difficult to achieve a satisfactory sealing effect due to insufficient sealing force, and when the fluid pressure is high, frequent opening and closing of the gate plate may cause excessive wear of the metal sealing surface, thereby affecting the sealing performance and service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the valve body and valve stem of the utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged view of point B in the middle;

[0019] Figure 4 For this utility model Figure 2 A partial enlarged view of the middle A;

[0020] Figure 5 This is a schematic diagram of the structure of the valve plate of the utility model;

[0021] Figure 6 It is a cross-sectional view of the valve body of the utility model.

[0022] In the figure: 1. valve body; 2. sealing mechanism; 201. sealing ring; 202. sealing groove; 203. fixed rod; 204. movable rod; 205. spring; 206. limit block; 207. sealing bearing; 208. fixed block; 209. connecting rod; 210. scraper; 3. cleaning mechanism; 301. water outlet pipe; 302. water inlet pipe; 303. control valve; 304. cleaning brush; 4. first through pipe; 5. second through pipe; 6. valve cover; 7. connecting plate; 8. bolt; 9. hand wheel; 10. docking rod; 11. valve stem; 12. valve plate; 13. first cavity; 14. second cavity; 15. filter screen; 16. screw sleeve; 17. guide hole body; 18. fixing seat; 19. pulley; 20. rotating shaft. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The following is combined with Figure 1-6 To further explain this application in detail,

[0025] The present application discloses a flat gate valve with a guide hole, referring to Figure 1 and Figure 6 A flat gate valve with a guide hole comprises a valve body 1, a first through pipe 4 and a second through pipe 5 are fixedly connected on both sides of the valve body 1, the first through pipe 4 and the second through pipe 5 respectively penetrate into the interior of the valve body 1, a valve cover 6 is movably connected to the top of the valve body 1, a connecting plate 7 is fixedly connected to the bottom of the valve cover 6 and the top of the valve body 1, the two connecting plates 7 are fixedly connected by bolts 8, a docking rod 10 is fixedly connected to the top of the valve cover 6, a screw sleeve 16 is fixedly connected to the interior of the docking rod 10, a valve stem 11 is threadedly connected to the interior of the screw sleeve 16, one end of the valve stem 11 penetrates into the interior of the valve cover 6, a valve plate 12 is rotatably connected to the bottom of the valve stem 11, a guide hole body 17 is provided in the interior of the valve plate 12, a first cavity 13 and a second cavity 14 are respectively provided in the interior of the valve body 1, and a sealing mechanism 2 is provided in the interior of the first through pipe 4 and the second through pipe 5;

[0026] The sealing mechanism 2 includes a sealing ring 201, which is fixedly connected to one side of the inner cavity of the first through tube 4 and the second through tube 5 respectively. The inner cavities of the first through tube 4 and the second through tube 5 are both provided with sealing grooves 202. A spring 205 is fixedly connected to one side of the inner wall of the sealing groove 202, and the other end of the spring 205 is fixedly connected to one side of the sealing ring 201. A fixed rod 203 and a movable rod 204 are arranged inside the spring 205. One end of the fixed rod 203 is fixedly connected to one side of the inner wall of the sealing groove 202, and the other end of the fixed rod 203 is slidably connected to the movable rod 204, and the other end of the movable rod 204 is fixedly connected to one side of the sealing ring 201.

[0027] Reference Figure 1 and Figure 2 The top of the valve stem 11 is fixedly connected with a hand wheel 9, and the top of the inner cavity of the docking rod 10 is fixedly connected with a sealed bearing 207. The valve stem 11 is rotatably connected to the inside of the sealed bearing 207. By setting the hand wheel 9, it is convenient for the user to rotate the valve stem 11, saving time and effort. By setting the sealed bearing 207, the valve stem 11 can be rotated more smoothly, preventing the valve stem 11 from getting stuck during the rotation process, and at the same time, the sealing between the docking rod 10 and the valve stem 11 can be increased.

[0028] Reference Figure 3 One end of the movable rod 204 is fixedly connected to a limiting block 206, the diameter of the limiting block 206 is larger than the diameter of the movable rod 204, and the limiting block 206 is slidably connected to the inside of the fixed rod 203. By setting the limiting block 206, the movement of the movable rod 204 can be limited to prevent the movable rod 204 from being separated from the inside of the fixed rod 203;

[0029] Reference Figure 4, both sides of the inner cavity of the valve cover 6 are fixedly connected with a fixing block 208, one side of the fixing block 208 is fixedly connected with a connecting rod 209, and the bottom of the connecting rod 209 is fixedly connected with a scraper 210, and the surface of the scraper 210 is in contact with the upper surface of the valve plate 12. By setting the scraper 210, the valve plate 12 can be in contact with the surface of the valve plate 12 during the up and down movement, and then the impurities on the upper surface of the valve plate 12 can be scraped off, thereby improving the cleanliness and smoothness of the surface of the valve plate 12, thereby improving the sealing performance and operation efficiency of the valve plate 12;

[0030] Reference Figure 1 and Figure 2 A cleaning mechanism 3 is provided inside the second cavity 14. The cleaning mechanism 3 includes a water outlet pipe 301. The water outlet pipe 301 is fixedly connected to the bottom of the inner cavity of the valve body 1. One side of the bottom of the surface of the valve body 1 is fixedly connected to a water inlet pipe 302. One side of the water outlet pipe 301 and the water inlet pipe 302 are fixedly connected to a control valve 303. Cleaning brushes 304 are fixedly connected to both sides of the top of the second cavity 14. The surface of the cleaning brush 304 is in contact with the lower surface of the valve plate 12. By providing the cleaning mechanism 3, water is poured from the water inlet pipe 302 into the interior of the valve body 1. When the valve plate 12 moves, the impurities on the lower surface of the valve plate 12 can be scraped off by the cleaning brush 304, thereby ensuring the cleanliness of the valve plate 12. By providing the water outlet pipe 301, sewage can be discharged from the water outlet pipe 301.

[0031] Reference Figure 2 and Figure 5 The inside of the guide hole body 17 is fixedly connected with a filter screen 15, and the filter screen 15 is made of stainless steel. By setting the filter screen 15, the circulating fluid can be filtered to ensure the cleanliness of the inside of the first through pipe 4 and prevent the circulation of impurities from affecting the overall airtightness;

[0032] Reference Figure 6 Both sides of the second cavity 14 are fixedly connected with a fixing seat 18, and the interior of the fixing seat 18 is fixedly connected with a rotating shaft 20. The surface of the rotating shaft 20 is rotatably connected with a pulley 19, and the surface of the pulley 19 is in contact with the surface of the valve plate 12. By setting the pulley 19, the friction force during the movement of the valve plate 12 can be reduced, so that the movement of the valve plate 12 is more stable, and the valve plate 12 can be prevented from getting stuck during the movement.

[0033] Working principle: when fluid needs to pass through, turn the handwheel 9 counterclockwise, and the rotation of the handwheel 9 drives the valve stem 11 to rotate, and at the same time, the valve stem 11 moves upward inside the screw sleeve 16, and the upward movement of the valve stem 11 drives the valve plate 12 to move, and the movement of the valve plate 12 drives the guide hole body 17 to gradually intersect with the first through pipe 4 and the second through pipe 5 until they completely overlap. At this time, the fluid can smoothly pass through the guide hole body 17, the first through pipe 4 and the second through pipe 5, and the valve is in a fully open state. When fluid circulation is not required, turn the handwheel 9 clockwise, and the rotation of the handwheel 9 drives the valve plate 12 to move downward through the valve stem 11. As the valve plate 12 descends, the guide hole body 17 gradually staggers with the first through pipe 4 and the second through pipe 5 until To fully closed, when the valve is in a fully closed state, the position of the valve plate 12 is fixed, the valve plate 12 contacts the sealing ring 201, and the sealing ring 201 is squeezed to cause the spring 205 to deform. Due to the ability to restore deformation, the spring 205 reversely squeezes the sealing ring 201, thereby increasing the airtightness of the sealing ring 201 and the valve plate 12. During the movement of the valve plate 12, the surface of the scraper 210 contacts the surface of the valve plate 12 to scrape off impurities on the surface of the valve plate 12, and by adding water to the inside of the second cavity 14, the movement of the valve plate 12 can make the cleaning brush 304 rub against the surface of the valve plate 12, remove impurities on the lower surface of the valve plate 12, and discharge sewage through the outlet pipe 301.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A flat gate valve with a guide hole, characterized in that: The invention comprises a valve body (1), wherein two sides of the valve body (1) are respectively fixedly connected with a first through pipe (4) and a second through pipe (5), wherein the first through pipe (4) and the second through pipe (5) respectively penetrate into the interior of the valve body (1), the top of the valve body (1) is movably connected with a valve cover (6), the bottom of the valve cover (6) and the top of the valve body (1) are both fixedly connected with a connecting plate (7), the two connecting plates (7) are fixedly connected by bolts (8), the top of the valve cover (6) is fixedly connected with a docking rod (10), and the docking rod ( A threaded sleeve (16) is fixedly connected to the interior of the threaded sleeve (16), a valve stem (11) is threadedly connected to the interior of the valve cover (6), one end of the valve stem (11) penetrates into the interior of the valve cover (6), the bottom of the valve stem (11) is rotatably connected to a valve plate (12), a guide hole body (17) is provided inside the valve plate (12), a first cavity (13) and a second cavity (14) are respectively provided inside the valve body (1), and a sealing mechanism (2) is provided inside the first through pipe (4) and the second through pipe (5); The sealing mechanism (2) comprises a sealing ring (201), wherein the sealing ring (201) is fixedly connected to one side of the inner cavity of the first through tube (4) and the second through tube (5), respectively; the inner cavities of the first through tube (4) and the second through tube (5) are both provided with sealing grooves (202); a spring (205) is fixedly connected to one side of the inner wall of the sealing groove (202); the other end of the spring (205) is fixedly connected to one side of the sealing ring (201); a fixed rod (203) and a movable rod (204) are arranged inside the spring (205); one end of the fixed rod (203) is fixedly connected to one side of the inner wall of the sealing groove (202); the other end of the fixed rod (203) is slidably connected to the movable rod (204); the other end of the movable rod (204) is fixedly connected to one side of the sealing ring (201).

2. A flat gate valve with a guide hole according to claim 1, characterized in that: The top of the valve stem (11) is fixedly connected to a hand wheel (9), the top of the inner cavity of the docking rod (10) is fixedly connected to a sealing bearing (207), and the valve stem (11) is rotatably connected to the inside of the sealing bearing (207).

3. A flat gate valve with a guide hole according to claim 1, characterized in that: One end of the movable rod (204) is fixedly connected to a limiting block (206); the diameter of the limiting block (206) is larger than the diameter of the movable rod (204); and the limiting block (206) is slidably connected to the inside of the fixed rod (203).

4. A flat gate valve with a guide hole according to claim 1, characterized in that: Both sides of the inner cavity of the valve cover (6) are fixedly connected with fixed blocks (208), one side of the fixed block (208) is fixedly connected with a connecting rod (209), the bottom of the connecting rod (209) is fixedly connected with a scraper (210), and the surface of the scraper (210) is in contact with the upper surface of the valve plate (12).

5. The flat gate valve with diversion holes according to claim 1 is characterized in that: A cleaning mechanism (3) is arranged inside the second cavity (14), and the cleaning mechanism (3) comprises a water outlet pipe (301), the water outlet pipe (301) is fixedly connected to the bottom of the inner cavity of the valve body (1), one side of the bottom of the surface of the valve body (1) is fixedly connected to a water inlet pipe (302), one side of the water outlet pipe (301) and the water inlet pipe (302) are both fixedly connected to a control valve (303), and cleaning brushes (304) are fixedly connected to both sides of the top of the second cavity (14), and the surface of the cleaning brush (304) is in contact with the lower surface of the valve plate (12).

6. A flat gate valve with a guide hole according to claim 1, characterized in that: A filter screen (15) is fixedly connected to the interior of the guide hole body (17), and the filter screen (15) is made of stainless steel.

7. The flat gate valve with guide holes according to claim 1, characterized in that: Both sides of the second cavity (14) are fixedly connected to a fixing seat (18), the interior of the fixing seat (18) is fixedly connected to a rotating shaft (20), the surface of the rotating shaft (20) is rotatably connected to a pulley (19), and the surface of the pulley (19) is in contact with the surface of the valve plate (12).

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