Wedge gate valve with guiding and desilting functions

Abstract

The invention provides a wedge gate valve with guiding and desilting functions, and belongs to the technical field of valves, the wedge gate valve comprises a main valve body, an inlet end flange, a discharge end flange, an upper desilting connecting pipe, a lower desilting connecting pipe, a desilting guide pipe, a desilting washing pump, a valve rod main body, a sealing cover plate and a filler cylinder, the inlet end flange is integrally cast at the left end of the main valve body; and the discharge end flange is integrally cast at the right end of the main valve body. Through the arrangement of the lower desilting diversion trench and the upper desilting diversion trench, the lower desilting diversion trench and the upper desilting diversion trench can cooperate with the spiral diversion trench and the scraper ring protrusion, impurities can smoothly avoid the movement area of the flashboard through the guiding effect on the impurities, accumulation of the impurities near the flashboard is reduced, and therefore the phenomenon that the flashboard is blocked is effectively avoided, and the service life of the flashboard is prolonged. The opening and closing operation of the valve is smoother and more flexible, and the operation convenience of the valve and the reliability of the system are improved; and the method has wider applicability in the fields of water conservancy, sewage treatment, industry and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and particularly relates to a wedge gate valve with a guiding silt cleaning function. Background Art

[0002] The opening and closing member of a gate valve is a gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be used for regulation and throttling. The gate plate has two sealing surfaces. In the most common mode, the two sealing surfaces of the gate valve form a wedge shape, and the wedge angle varies with the valve parameters, usually being 5°. When the medium temperature is not high, it is 2°52'. The gate plate of the wedge gate valve can be made into an integral body, called a rigid gate plate; it can also be made into a gate plate that can produce a small amount of deformation to improve its manufacturability and make up for the deviation generated in the processing of the sealing surface angle. This kind of gate plate is called an elastic gate plate. When the gate valve is closed, the sealing surface can rely only on the medium pressure for sealing, that is, relying on the medium pressure to press the sealing surface of the gate plate against the valve seat on the other side to ensure the sealing of the sealing surface. This is self-sealing. Most gate valves use forced sealing, that is, when the valve is closed, external force is required to forcibly press the gate plate against the valve seat to ensure the sealing performance of the sealing surface. The gate plate of the gate valve moves linearly together with the valve stem, which is called a rising stem gate valve, also called a rising stem outside screw and yoke valve. Usually, there is a trapezoidal thread on the rising stem. Through the nut at the top of the valve and the guide groove on the valve body, the rotational motion is changed into a linear motion, that is, the operating torque is changed into an operating thrust.

[0003] In addition, the Chinese Patent Publication No. is CN114352758B, and the invention creation name is a wedge-tight gate valve with reliable sealing. The present invention includes a valve body. Inlet and outlet channels are provided at both ends of the valve body. Valve seats are arranged at the inlet and outlet channels. The upper end of the valve body is connected to the lower end of the valve cover. The upper end of the valve cover is provided with a power supply component for the up and down movement of the gate plate. The gate plate is located in the valve body and cooperates with the valve seat for sealing. A driving component for the up and down movement of the gate plate is arranged in the valve cover. The gate plate is connected to the power supply component for the up and down movement through the driving component for the up and down movement. In the existing wedge gate valve, when the valve plate and the valve seat are closed, particulate matters (such as sediment and crystals) are likely to accumulate in the wedge-shaped gap, resulting in the valve being unable to be fully closed or the sealing surface being scratched. The valve seat area has no self-cleaning function, and it needs to be disassembled and maintained frequently, affecting the continuity of the system.

[0004] In view of this, it is very necessary to invent a wedge gate valve with a guiding silt cleaning function. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a wedge gate valve with a guiding silt cleaning function, which can solve the problems that in the existing wedge gate valve, when the valve plate and the valve seat are closed, particulate matters (such as sediment and crystals) are likely to accumulate in the wedge-shaped gap, resulting in the valve being unable to be fully closed or the sealing surface being scratched. The valve seat area has no self-cleaning function, and it needs to be disassembled and maintained frequently, affecting the continuity of the system.

[0006] A wedge gate valve with a guiding dredging function, comprising a main valve body, an inlet flange, a discharge flange, an upper dredging connection pipe, a lower dredging connection pipe, a dredging conduit, a dredging pump, a valve stem body, an adjusting handwheel, a sealing cover plate and a stuffing box. The inlet flange is integrally cast at the left end of the main valve body; the discharge flange is integrally cast at the right end of the main valve body; the upper dredging connection pipe is embedded in the upper right position of the main valve body and is communicated with its interior, near the discharge flange end; the lower dredging connection pipe is embedded in the lower left position of the main valve body and is communicated with its interior, near the inlet flange end; there are two dredging conduits, which are respectively sleeved on the tops of the upper dredging connection pipe and the lower dredging connection pipe and are locked and fixed with stainless steel clamps; the other ends of the dredging conduits are sleeved on the output end of the dredging pump.

[0007] Preferably, the valve stem body penetrates through the sealing cover plate and the stuffing box and is inserted into the middle position inside the main valve body; a lower dredging diversion groove is provided on the left inner surface of the main valve body, and an upper dredging diversion groove is provided on the right inner surface of the main valve body; a buffer chamber is integrally provided at the upper middle position of the main valve body; the adjusting handwheel is sleeved on the upper part of the valve stem body and is locked and fixed with a handwheel bolt; the handwheel bolt is threadedly connected to the upper middle position of the adjusting handwheel; the sealing cover plate is bolted to the upper part of the stuffing box; the stuffing box is bolted to the upper part of the main valve body; constraint valve seats are clamped on both sides of the middle position inside the main valve body, and an annular storage groove is provided at the middle position inside the main valve body.

[0008] Preferably, a gate valve plate is threadedly connected to the lower end of the valve stem body, limiting ear plates are integrally provided on the left and right sides of the gate valve plate, and a valve stem nut is embedded in the upper middle position of the gate valve plate; the valve stem nut is threadedly connected to the lower end of the valve stem body.

[0009] Preferably, the storage groove is located inside the constraint valve seat; the constraint valve seat is located between the lower dredging diversion groove and the upper dredging diversion groove.

[0010] Preferably, the top port of the lower dredging connection pipe is communicated with the lower dredging diversion groove; the top port of the upper dredging connection pipe is communicated with the upper dredging diversion groove.

[0011] Preferably, the dredging pump is communicated with the interiors of the upper dredging diversion groove and the lower dredging diversion groove respectively through the dredging conduit, the upper dredging connection pipe and the lower dredging connection pipe.

[0012] Preferably, the gate valve plate is clamped in the constraint valve seat and is located in the storage groove.

[0013] Preferably, an "O" - shaped sealing ring is provided at the intersection of the valve stem body with the top outlet of the sealing cover plate and the stuffing box.

[0014] Preferably, the gate valve plate is a wedge - shaped elastic valve plate, and a scraping ring protrusion is provided on the outer circle of the gate valve plate.

[0015] Preferably, the groove depth of the lower dredging diversion groove and the upper dredging diversion groove is 1.2 ± 2 mm, the groove width is 2 ± 2 mm, the spiral angle is 40°, and the number of grooves is 4 each, distributed in a vortex shape; the inclination slope of the inclined surface of the lower dredging diversion groove and the upper dredging diversion groove is 30° - 40°.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The wedge - type gate valve with a guiding dredging function of the present invention can provide an efficient dredging effect. Especially the setting of the lower dredging diversion groove and the upper dredging diversion groove can cooperate with the spiral diversion groove and the scraping ring protrusion, and the impurity removal rate is increased by more than 80%, avoiding jamming; through the guiding effect on impurities, the impurities can smoothly avoid the movement area of the gate plate, reducing the accumulation of impurities near the gate plate, thus effectively avoiding the occurrence of gate plate jamming phenomenon, making the opening and closing operations of the valve smoother and more flexible, improving the operation convenience of the valve and the reliability of the system.

[0017] The leakage rate of the gate valve plate is zero within the pressure range of 0 - 10 MPa, extending the service life; since the impurities are timely guided and removed, there is no longer interference from impurities between the sealing surfaces, enabling close fitting, greatly improving the sealing performance of the valve, effectively preventing the occurrence of medium leakage problems, ensuring the sealing and safety of the system, and at the same time reducing medium waste; the entire device can reduce the maintenance cost, does not require frequent disassembly and cleaning, can better adapt to the medium environment containing impurities, expands the application range of the valve, and has a wider applicability in the fields of water conservancy, sewage treatment, industry, etc.

[0018] The setting of the upper dredging connection pipe, the lower dredging connection pipe, the dredging conduit, and the dredging wash pump can also realize the automation of the dredging operation, without the need for frequent manual cleaning, improving the work efficiency and reducing the labor intensity of workers. Brief Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the present invention.

[0020] Figure 2 is the top - view structural schematic diagram of the main valve body of the present invention.

[0021] Figure 3 is the cross - sectional structural schematic diagram of the main valve body of the present invention.

[0022] Figure 4 This is a schematic structural view of the valve stem body of the present invention.

[0023] In the figure: 1. Main valve body; 2. Inlet flange; 3. Discharge flange; 4. Upper dredging connection pipe; 5. Lower dredging connection pipe; 6. Dredging conduit; 7. Dredging pump; 8. Valve stem body; 9. Adjusting handwheel; 10. Sealing cover plate; 11. Handwheel bolt; 12. Packing gland; 13. Lower dredging diversion groove; 14. Buffer chamber; 15. Upper dredging diversion groove; 16. Restraint valve seat; 17. Receiving groove; 18. Gate valve plate; 19. Limit ear plate; 20. Valve stem nut. Specific embodiments

[0024] The present invention will be further described below with reference to the accompanying drawings: Embodiment

[0025] As shown in the attached Figure 1 to the attached Figure 4 The present invention provides a wedge gate valve with a guiding dredging function, including a main valve body 1, an inlet flange 2, a discharge flange 3, an upper dredging connection pipe 4, a lower dredging connection pipe 5, a dredging conduit 6, a dredging pump 7, a valve stem body 8, an adjusting handwheel 9, a sealing cover plate 10 and a packing gland 12. The inlet flange 2 is integrally cast at the left end of the main valve body 1; the discharge flange 3 is integrally cast at the right end of the main valve body 1; the upper dredging connection pipe 4 is embedded in the upper right position of the main valve body 1 and is connected to its interior, near the discharge flange 3; the lower dredging connection pipe 5 is embedded in the lower left position of the main valve body 1 and is connected to its interior, near the inlet flange 2; there are two dredging conduits 6, which are respectively sleeved at the top ends of the upper dredging connection pipe 4 and the lower dredging connection pipe 5 and are locked and fixed with stainless steel clamps; the other end of the dredging conduit 6 is sleeved at the output end of the dredging pump 7.

[0026] In the above embodiments, specifically, the valve stem body 8 penetrates through the sealing cover plate 10 and the stuffing box 12 and is inserted into the middle position inside the main valve body 1; a lower dredging diversion groove 13 is provided on the left side of the inner surface of the main valve body 1, and an upper dredging diversion groove 15 is provided on the right side of the inner surface of the main valve body 1; the groove depth of the lower dredging diversion groove 13 and the upper dredging diversion groove 15 is 1.2 ± 2 mm, the groove width is 2 ± 2 mm, the spiral angle is 40°, and the number of grooves is 4 each, distributed in a vortex shape; the inclination slope of the inclined surfaces of the lower dredging diversion groove 13 and the upper dredging diversion groove 15 is 30° - 40°; a buffer chamber 14 is integrally provided at the middle position of the upper part of the main valve body 1; the adjusting handwheel 9 is sleeved on the upper part of the valve stem body 8 and is locked and fixed with a handwheel bolt 11; the handwheel bolt 11 is threadedly connected to the middle position of the upper part of the adjusting handwheel 9; the sealing cover plate 10 is bolted to the upper part of the stuffing box 12; the stuffing box 12 is bolted to the upper part of the main valve body 1; constraint valve seats 16 are clamped on both sides of the middle position inside the main valve body 1, and an annular storage groove 17 is provided at the middle position inside the main valve body 1.

[0027] In the above embodiments, specifically, a gate valve plate 18 is threadedly connected to the lower end of the valve stem body 8, limiting ear plates 19 are integrally provided on the left and right sides of the gate valve plate 18, and a valve stem nut 20 is embedded at the middle position of the upper part of the gate valve plate 18; the valve stem nut 20 is threadedly connected to the lower end of the valve stem body 8.

[0028] In the above embodiments, specifically, the storage groove 17 is located inside the constraint valve seat 16; the constraint valve seat 16 is located between the lower dredging diversion groove 13 and the upper dredging diversion groove 15.

[0029] In the above embodiments, specifically, the top port of the lower dredging connecting pipe 5 is communicated with the lower dredging diversion groove 13; the top port of the upper dredging connecting pipe 4 is communicated with the upper dredging diversion groove 15.

[0030] In the above embodiments, specifically, the dredging and washing pump 7 is communicated with the inside of the upper dredging diversion groove 15 and the lower dredging diversion groove 13 respectively through a dredging conduit 6, the upper dredging connecting pipe 4, and the lower dredging connecting pipe 5.

[0031] In the above embodiments, specifically, the gate valve plate 18 is clamped inside the constraint valve seat 16 and is located inside the storage groove 17.

[0032] In the above embodiments, specifically, an "O" - shaped sealing ring is provided at the intersection of the valve stem body 8 and the top outlets of the sealing cover plate 10 and the stuffing box 12.

[0033] In the above embodiments, specifically, the gate valve plate 18 is a wedge-shaped elastic valve plate, and a scraper ring protrusion is arranged on the outer circle of the gate valve plate 18.

[0034] The working process of the present invention is as follows: During the closing process, hold the adjusting handwheel 9 and rotate it clockwise, so that the valve stem body 8 drives the gate valve plate 18 to move downward. The gate valve plate 18 is pressed against the receiving groove 17 along the inclined surface of the constraint valve seat 16. At this time, the fluid forms a swirling flow through the lower dredging diversion groove 13, flushes the surface and carries impurities out. The scraper ring protrusion can initially scrape off stubborn deposits in the groove; During the opening process, rotate the adjusting handwheel 9 counterclockwise to lift the valve stem body 8 and the gate valve plate 18. The gate valve plate 18 is separated from the constraint valve seat 16, and the residual impurities in the diversion groove are secondarily flushed by the rising fluid of the constraint valve seat 16 and the upper dredging diversion groove 15 to prevent them from being re-caught in the sealing surface.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wedge gate valve with a guiding silt removal function, characterized in that, The wedge gate valve with a guiding silt cleaning function includes a main valve body (1), an inlet flange (2), a discharge flange (3), an upper silt cleaning connecting pipe (4), a lower silt cleaning connecting pipe (5), a silt cleaning conduit (6), a silt cleaning pump (7), a valve stem body (8), an adjusting handwheel (9), a sealing cover plate (10) and a stuffing box (12). The inlet flange (2) is integrally cast at the left end of the main valve body (1); the discharge flange (3) is integrally cast at the right end of the main valve body (1); the upper silt cleaning connecting pipe (4) is embedded in the upper right position of the main valve body (1) and is connected to its interior, near the discharge flange (3); the lower silt cleaning connecting pipe (5) is embedded in the lower left position of the main valve body (1) and is connected to its interior, near the inlet flange (2); two silt cleaning conduits (6) are provided, which are respectively sleeved on the tops of the upper silt cleaning connecting pipe (4) and the lower silt cleaning connecting pipe (5) and are locked and fixed with stainless steel clamps; the other ends of the silt cleaning conduits (6) are sleeved on the output end of the silt cleaning pump (7).

2. The wedge gate valve with a guiding silt removal function according to claim 1, characterized in that, The valve stem body (8) passes through the sealing cover plate (10) and the stuffing box (12) and is inserted into the middle position inside the main valve body (1); a lower silt cleaning diversion groove (13) is formed on the left inner surface of the main valve body (1), and an upper silt cleaning diversion groove (15) is formed on the right inner surface of the main valve body (1); a buffer chamber (14) is integrally provided at the upper middle position of the main valve body (1).

3. The wedge gate valve with a guiding silt removal function according to claim 1, wherein, The adjusting handwheel (9) is sleeved on the upper part of the valve stem body (8) and is locked and fixed with a handwheel bolt (11); the handwheel bolt (11) is threadedly connected to the upper middle position of the adjusting handwheel (9); the sealing cover plate (10) is bolted to the upper part of the stuffing box (12); the stuffing box (12) is bolted to the upper part of the main valve body (1); restraint valve seats (16) are clamped on both sides of the middle position inside the main valve body (1), and an annular receiving groove (17) is formed at the middle position inside the main valve body (1).

4. The wedge gate valve with a guiding silt removal function according to claim 1, characterized in that, The lower end of the valve stem body (8) is threadedly connected to a gate valve plate (18), the left and right sides of the gate valve plate (18) are integrally provided with limit ear plates (19), and a valve stem nut (20) is embedded in the upper middle position of the gate valve plate (18); the valve stem nut (20) is threadedly connected to the lower end of the valve stem body (8).

5. The wedge gate valve with a guiding silt removal function according to claim 3, characterized in that, The receiving groove (17) is located inside the restraint valve seat (16); the restraint valve seat (16) is located between the lower silt cleaning diversion groove (13) and the upper silt cleaning diversion groove (15).

6. The wedge gate valve with a guiding dredging function according to claim 2, characterized in that, The top port of the lower silt cleaning connecting pipe (5) is communicated with the lower silt cleaning diversion groove (13); the top port of the upper silt cleaning connecting pipe (4) is communicated with the upper silt cleaning diversion groove (15).

7. The wedge gate valve with a guiding silt cleaning function according to claim 2, characterized in that, The silt cleaning pump (7) is communicated with the interiors of the upper silt cleaning diversion groove (15) and the lower silt cleaning diversion groove (13) respectively through the silt cleaning conduit (6), the upper silt cleaning connecting pipe (4) and the lower silt cleaning connecting pipe (5).

8. The wedge gate valve with a guiding silt cleaning function according to claim 2, characterized in that An "O"-shaped sealing ring is provided at the intersection of the valve stem body (8) with the top outlet of the sealing cover plate (10) and the stuffing box (12).

9. The wedge gate valve with a guiding silt cleaning function as described in claim 2, wherein The groove depth of the lower dredging diversion groove (13) and the upper dredging diversion groove (15) is 1.2 ± 2 mm, the groove width is 2 ± 2 mm, the spiral angle is 40°, and the number of grooves is 4 each, distributed in a vortex shape; the inclination slope of the lower dredging diversion groove (13) and the upper dredging diversion groove (15) is 30° - 40°.

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