A wedge-type gate valve with guided dredging function

Abstract

The present invention provides a wedge-type gate valve with a guided dredging function, which belongs to the field of valve technology and includes a main valve body, an inlet end flange, a discharge end flange, an upper dredging pipe, a lower dredging pipe, a dredging conduit, a dredging washing pump, a valve stem body, a sealing cover plate, and a stuffing cylinder. The inlet end flange is integrally cast at the left end of the main valve body; the discharge end flange is integrally cast at the right end of the main valve body. The arrangement of the lower dredging guide groove and the upper dredging guide groove of the present invention can cooperate with the spiral guide groove and the scraper ring protrusion, and through the guidance of impurities, the impurities can smoothly avoid the movement area of ​​the gate plate, reducing the accumulation of impurities near the gate plate, thereby effectively avoiding the occurrence of gate plate jamming, making the opening and closing operations of the valve smoother and more flexible, improving the valve's operational convenience and the system's reliability; and having a wider range of applicability in the fields of water conservancy, sewage treatment, and industry.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to a wedge-type gate valve with a guiding and desilting function. Background Art

[0002] The gate valve's opening and closing element is the disc, which moves perpendicular to the flow direction. A gate valve can only be fully opened and closed; it cannot be adjusted or throttled. The disc has two sealing surfaces. The most commonly used type, a disc valve, forms a wedge-shaped seal. The wedge angle varies with valve parameters, typically 5°, and 2°.52° for moderate media temperatures. The disc of a wedge-type gate valve can be a single piece, known as a rigid disc, or it can be slightly deformed to improve processability and compensate for deviations in the sealing surface angle during processing. This type of disc is known as an elastic disc. When the gate valve is closed, the sealing surface relies solely on media pressure, pressing the disc's sealing surface against the valve seat on the other side to ensure a tight seal. This is known as self-sealing. Most gate valves use a forced seal, meaning that when the valve is closed, an external force forces the disc against the seat to ensure a tight seal. A gate valve whose gate moves linearly with the stem is called a lifting stem gate valve, also known as a rising stem gate valve. The lifting stem usually has a trapezoidal thread that converts rotary motion into linear motion through the nut at the top of the valve and the guide groove on the valve body, which converts operating torque into operating thrust.

[0003] In addition, the Chinese patent publication number is CN114352758B, and the invention is titled "A Wedge-Tightened Gate Valve with Reliable Sealing." The invention comprises a valve body, with inlet and outlet passages at both ends, each of which is provided with a valve seat. The upper end of the valve body is connected to the lower end of a valve cover, and the upper end of the valve cover is provided with a power supply component for the vertical movement of the gate. The gate is located within the valve body and seals with the valve seat. The valve cover is provided with a vertical drive component for the gate, and the gate is connected to the vertical drive component via the vertical drive component. Existing wedge-tightened gate valves also have the problem that when the valve plate and valve seat are closed, particulate matter (such as silt and crystals) easily accumulates in the wedge-shaped gap, resulting in the valve not being able to fully close or scratching the sealing surface. The valve seat area lacks a self-cleaning function, requiring frequent disassembly and maintenance, which affects system continuity.

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

[0005] In order to solve the above technical problems, the present invention provides a wedge-type gate valve with a guided silt removal function, which can solve the problem in the prior art that when the valve plate and the valve seat are closed, particulate matter (such as mud and crystals) are easily accumulated in the wedge-shaped gap, resulting in the valve being unable to be completely closed or the sealing surface being scratched, the valve seat area has no self-cleaning function, and frequent disassembly and maintenance are required, which affects the continuity of the system.

[0006] A wedge-type gate valve with a guided dredging function, comprising a main valve body, an inlet end flange, a discharge end flange, an upper dredging pipe, a lower dredging pipe, a dredging guide pipe, a dredging pump, a valve stem body, an adjusting hand wheel, a sealing cover plate and a stuffing cylinder.

[0007] The inlet end flange is integrally cast at the left end of the main valve body; the discharge end flange is integrally cast at the right end of the main valve body; the upper dredging pipe is embedded in the upper right position of the main valve body and is connected to the interior thereof, close to the discharge end flange end; the lower dredging pipe is embedded in the lower left position of the main valve body and is connected to the interior thereof, close to the inlet end flange end; two dredging conduits are provided, which are respectively socketed with the top ends of the upper dredging conduit and the lower dredging conduit and are locked and fixed with stainless steel clamps; the other end of the dredging conduit is socketed on the output end of the dredging and washing pump.

[0008] Preferably, the valve stem body passes through the sealing cover plate and the stuffing cylinder and is inserted into the inner middle position of the main valve body; a lower dredging guide groove is provided on the left side of the inner surface of the main valve body, and an upper dredging guide groove is provided on the right side of the inner surface of the main valve body; a buffer chamber is integrated in the upper middle position of the main valve body; the adjusting handwheel is sleeved on the upper part of the valve stem body and 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 cylinder; the stuffing cylinder is bolted to the upper part of the main valve body; constraint valve seats are clamped on both sides of the inner middle position of the main valve body, and an annular receiving groove is provided in the inner middle position of the main valve body.

[0009] Preferably, the lower end of the valve stem body is threadedly connected to a gate valve plate, and limiting ear plates are integrated on the left and right sides of the gate valve plate. 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.

[0010] Preferably, the receiving groove is located on the inner side of the constraining valve seat; the constraining valve seat is located between the lower silt removal guide groove and the upper silt removal guide groove.

[0011] Preferably, the top port of the lower silt removal pipe is connected to the lower silt removal guide trough; the top port of the upper silt removal pipe is connected to the upper silt removal guide trough.

[0012] Preferably, the desilting and washing pump is respectively connected to the interior of the upper desilting diversion trough and the lower desilting diversion trough through a desilting conduit and an upper desilting connecting pipe and a lower desilting connecting pipe.

[0013] Preferably, the gate valve plate is clamped in the constrained valve seat and located in the receiving groove.

[0014] Preferably, an O-ring is provided at the intersection of the valve stem body, the sealing cover plate and the top outlet of the stuffing cylinder.

[0015] Preferably, the gate valve plate is a wedge-shaped elastic valve plate, and the outer ring of the gate valve plate is provided with a scraper ring protrusion.

[0016] Preferably, the groove depth of the lower dredging guide groove and the upper dredging guide groove is 1.2±2mm, the groove width is 2±2mm, the spiral angle is 40°, the number of grooves is 4 each and they are distributed in a vortex shape; the slope of the inclined surface of the lower dredging guide groove and the upper dredging guide groove is 30°-40°.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The wedge-type gate valve of this invention has a guided dredging function, which can provide efficient dredging effect. In particular, the setting of the lower dredging guide groove and the upper dredging guide groove can cooperate with the spiral guide groove and the scraper ring protrusion to increase the impurity removal rate by more than 80% and avoid jamming. By guiding the impurities, the impurities can smoothly avoid the movement area of ​​the gate plate, reducing the accumulation of impurities near the gate plate, thereby effectively avoiding the occurrence of gate jamming, making the opening and closing operations of the valve smoother and more flexible, and improving the valve operation convenience and system reliability.

[0019] The gate valve plate has a zero leakage rate within the pressure range of 0-10MPa, thereby extending its service life. Since impurities are guided and removed in a timely manner, there is no interference from impurities between the sealing surfaces, and a tight fit can be achieved, which greatly improves the sealing performance of the valve, effectively prevents the occurrence of medium leakage problems, ensures the sealing and safety of the system, and also reduces medium waste. The entire equipment can reduce maintenance costs, does not require frequent disassembly and cleaning, and can better adapt to the medium environment containing impurities, thereby expanding the application range of the valve and having a wider range of applicability in water conservancy, sewage treatment, industry and other fields.

[0020] The arrangement of the upper silt removal pipe, the lower silt removal pipe, the silt removal conduit and the silt removal washing pump can also realize the automation of the silt removal operation, eliminating the need for frequent manual cleaning, thereby improving work efficiency and reducing manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the top structure of the main valve body of the present invention.

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the main valve body of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the valve stem body of the present invention.

[0025] In the picture:

[0026] 1. Main valve body; 2. Inlet end flange; 3. Discharge end flange; 4. Upper dredging pipe; 5. Lower dredging pipe; 6. Dredging guide tube; 7. Dredging and washing pump; 8. Valve stem body; 9. Adjusting handwheel; 10. Sealing cover plate; 11. Handwheel bolt; 12. Stuffing cylinder; 13. Lower dredging guide groove; 14. Buffer chamber; 15. Upper dredging guide groove; 16. Constrained valve seat; 17. Receiving groove; 18. Gate valve plate; 19. Limiting ear plate; 20. Valve stem nut. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Example:

[0029] As attached Figure 1 To the attached Figure 4 As shown, the present invention provides a wedge-type gate valve with a guided dredging function, comprising a main valve body 1, an inlet end flange 2, a discharge end flange 3, an upper dredging pipe 4, a lower dredging pipe 5, a dredging conduit 6, a dredging and washing pump 7, a valve stem body 8, an adjusting hand wheel 9, a sealing cover plate 10 and a stuffing cylinder 12.

[0030] The inlet end flange 2 is integrally cast at the left end of the main valve body 1; the discharge end flange 3 is integrally cast at the right end of the main valve body 1; the upper dredging pipe 4 is embedded in the upper right position of the main valve body 1 and is connected to the interior thereof, close to the discharge end flange 3; the lower dredging pipe 5 is embedded in the lower left position of the main valve body 1 and is connected to the interior thereof, close to the inlet end flange 2; two dredging conduits 6 are provided, which are respectively socketed with the top ends of the upper dredging pipe 4 and the lower dredging pipe 5 and are locked and fixed with stainless steel clamps; the other end of the dredging conduit 6 is socketed on the output end of the dredging and washing pump 7.

[0031] In the above embodiment, specifically, the valve stem body 8 passes through the sealing cover plate 10 and the stuffing tube 12 and is inserted into the middle position of the interior of the main valve body 1; a lower dredging guide groove 13 is provided on the left side of the inner surface of the main valve body 1, and an upper dredging guide 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 guide groove 13 and the upper dredging guide groove 15 is 1.2±2mm, the groove width is 2±2mm, the spiral angle is 40°, and the number of grooves is 4 each and is distributed in a vortex shape; the slope of the inclined surface of the lower dredging guide groove 13 and the upper dredging guide groove 15 is 30°-40°; a buffer chamber 14 is integrated in the upper middle position 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 upper middle position of the adjusting handwheel 9; the sealing cover plate 10 is bolted to the upper part of the stuffing cylinder 12; the stuffing cylinder 12 is bolted to the upper part of the main valve body 1; the inner middle position of the main valve body 1 is clamped with restraining valve seats 16 on both sides, and the inner middle position of the main valve body 1 is provided with an annular receiving groove 17.

[0032] In the above embodiment, specifically, the lower end of the valve stem body 8 is threadedly connected to the gate valve plate 18, and the left and right sides of the gate valve plate 18 are integrated with limiting ear plates 19, and the upper middle position of the gate valve plate 18 is inlaid with a valve stem nut 20; the valve stem nut 20 is threadedly connected to the lower end of the valve stem body 8.

[0033] In the above embodiment, specifically, the receiving groove 17 is located on the inner side of the restraining valve seat 16 ; the restraining valve seat 16 is located between the lower desilting guide groove 13 and the upper desilting guide groove 15 .

[0034] In the above embodiment, specifically, the top port of the lower desilting pipe 5 is connected to the lower desilting diversion trough 13 ; the top port of the upper desilting pipe 4 is connected to the upper desilting diversion trough 15 .

[0035] In the above embodiment, specifically, the desilting and washing pump 7 is connected to the interior of the upper desilting diversion trough 15 and the lower desilting diversion trough 13 through the desilting conduit 6 and the upper desilting pipe 4 and the lower desilting pipe 5 respectively.

[0036] In the above embodiment, specifically, the gate valve plate 18 is clamped in the restraining valve seat 16 and is located in the receiving groove 17 .

[0037] In the above embodiment, specifically, an O-ring is provided at the intersection of the valve stem body 8 , the sealing cover plate 10 and the top outlet of the stuffing tube 12 .

[0038] In the above embodiment, specifically, the gate valve plate 18 is a wedge-shaped elastic valve plate, and the outer ring of the gate valve plate 18 is provided with a scraper ring protrusion.

[0039] The working process of the present invention is as follows: during the closing process, the adjusting hand wheel 9 is held and rotated clockwise, so that the valve stem body 8 drives the gate valve plate 18 to move downward, and the gate valve plate 18 is pressed tightly in the receiving groove 17 along the inclined surface of the constrained valve seat 16. At this time, the fluid forms a vortex through the lower dredging guide groove 13, flushing the surface and carrying impurities out. The scraper ring protrusion can preliminarily scrape off the stubborn sediment in the groove; during the opening process, the adjusting hand wheel 9 is rotated counterclockwise to lift the valve stem body 8 and the gate valve plate 18, and the gate valve plate 18 is separated from the constrained valve seat 16. The residual impurities in the guide groove are flushed for the second time by the rising fluid of the constrained valve seat 16 and the upper dredging guide groove 15 to avoid being stuck in the sealing surface again.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wedge-type gate valve with a guided dredging function, characterized in that: The wedge-type gate valve with guided desilting function comprises a main valve body (1), an inlet end flange (2), a discharge end flange (3), an upper desilting pipe (4), a lower desilting pipe (5), a desilting conduit (6), a desilting washing pump (7), a valve stem body (8), an adjusting hand wheel (9), a sealing cover plate (10) and a stuffing cylinder (12), wherein the inlet end flange (2) is integrally cast on the left end of the main valve body (1); the discharge end flange (3) is integrally cast on the right end of the main valve body (1); the upper desilting pipe (4) is embedded in the upper right position of the main valve body (1) and is connected to the interior thereof, close to the end of the discharge end flange (3); the lower desilting pipe (5) is embedded in the lower left position of the main valve body (1) and is connected to the interior thereof, close to the end of the inlet end flange (2); the desilting conduit (6) is provided with two ends, which are respectively connected to the upper desilting pipe ( 4) and the top end of the lower dredging pipe (5) are sleeved and fixed with a stainless steel clamp; the other end of the dredging conduit (6) is sleeved on the output end of the dredging and washing pump (7); the valve stem body (8) passes through the sealing cover plate (10) and the stuffing tube (12) and is inserted into the middle position inside the main valve body (1); the left side of the inner surface of the main valve body (1) is provided with a lower dredging guide groove (13), and the right side of the inner surface of the main valve body (1) is provided with an upper dredging guide groove (15); the upper middle position of the main valve body (1) is integrated with a buffer chamber (14); the adjusting hand wheel (9) is sleeved on the upper part of the valve stem body (8) and is locked and fixed with a hand wheel bolt (11); the hand wheel bolt (11) is threadedly connected to the upper middle position of the adjusting hand wheel (9); the sealing cover plate (10) is bolted to the upper part of the stuffing tube (12); The stuffing cylinder (12) is bolted to the upper part of the main valve body (1); the inner middle position of the main valve body (1) is clamped with a restraining valve seat (16) on both sides, and the inner middle position of the main valve body (1) is provided with an annular receiving groove (17); the groove depth of the lower dredging guide groove (13) and the upper dredging guide groove (15) is 1.2±2mm, the groove width is 2±2mm, the spiral angle is 40°, and the number of grooves is 4 each and is distributed in a vortex shape; the slope of the inclined surface of the lower dredging guide groove (13) and the upper dredging guide groove (15) is 30°-40°.

2. The wedge-type gate valve with guided dredging 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), and the left and right sides of the gate valve plate (18) are integrally provided with limiting ear plates (19), and the upper middle position of the gate valve plate (18) is inlaid with a valve stem nut (20); the valve stem nut (20) is threadedly connected to the lower end of the valve stem body (8).

3. The wedge-type gate valve with guided dredging function according to claim 1, characterized in that: The receiving groove (17) is located on the inner side of the restraining valve seat (16); the restraining valve seat (16) is located between the lower desilting guide groove (13) and the upper desilting guide groove (15).

4. The wedge-type gate valve with guided dredging function according to claim 1, characterized in that: The top port of the lower desilting pipe (5) is connected to the lower desilting guide trough (13); the top port of the upper desilting pipe (4) is connected to the upper desilting guide trough (15).

5. The wedge-type gate valve with guided dredging function according to claim 1, characterized in that: The desilting and washing pump (7) is connected to the interior of the upper desilting diversion trough (15) and the lower desilting diversion trough (13) through the desilting conduit (6), the upper desilting pipe (4) and the lower desilting pipe (5), respectively.

6. The wedge-type gate valve with guided dredging function according to claim 2, characterized in that: An O-ring is provided at the intersection of the valve stem body (8), the sealing cover plate (10) and the top outlet of the stuffing cylinder (12).

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