Anti-jamming gate valve

Abstract

The utility model provides an anti -blocking knife gate valve, including the valve body, the flashboard, threaded rod and hand wheel, one side of valve body is equipped with the water inlet valve, the other side is equipped with the water outlet valve, the flashboard is located in the valve body and slides, the bottom end of threaded rod is connected with the flashboard, and the top is connected with hand wheel through support frame, the bottom of valve body is installed with the collection of dirt box, the bottom of valve body is equipped with the slot of inverted bucket shape, and through the slot, the valve body is communicated with the inside of collection of dirt box, one side of collection of dirt box is equipped with the water inlet, one side is equipped with the sewage outlet, the upper portion of collection of dirt box is fixed with a support plate, three guide rods are located in the support plate and slide at equal intervals, and the top of guide rod is fixed with a blocking slot trapezoidal block, the spring is located in the guide rod and is located between trapezoidal block and support plate, the connecting place of valve body and water outlet valve is fixed with a annular seat, and the annular seat is installed with filter screen. The utility model has the advantages of simple structure, good anti -blocking effect, convenient maintenance etc.

Description

Technical Field

[0001] This utility model relates to the field of knife gate valve technology, and in particular to an anti-clogging knife gate valve. Background Technology

[0002] Manual knife gate valves have advantages such as simple and compact structure, reasonable design, lightweight and material-saving, reliable sealing, easy and flexible operation, small size, smooth flow channel, low flow resistance, light weight, easy installation, and easy disassembly. They are widely used in mining, steel, wastewater purification, papermaking, and power plant ash removal. Knife gate valves, also known as knife gate valves or knife-type slurry valves, have a gate as their opening and closing element. The gate's movement direction is perpendicular to the fluid direction. The gate of the knife gate valve has a shearing function, which can scrape off adhering substances on the sealing surface, automatically removing debris. The stainless steel gate prevents seal leakage caused by corrosion. The working principle of the knife gate valve is as follows: Manually rotating the handwheel causes the valve stem to rise and fall, thereby moving the gate up and down to open and close the valve. Rotating clockwise lowers the gate and closes the valve; rotating counterclockwise raises the gate and opens the valve.

[0003] When existing knife gate valves are in use, particles or impurities gradually accumulate on the inlet valve seat, reducing the valve's sealing performance and affecting fluid flow. In addition, their complex structure makes maintenance difficult. Utility Model Content

[0004] This invention provides an anti-clogging knife gate valve to solve the problems mentioned in the background art.

[0005] To address the aforementioned problems, this utility model provides an anti-clogging gate valve, comprising a valve body, a gate, a threaded rod, and a handwheel. The valve body has an inlet valve on one side and an outlet valve on the other. The gate is slidably mounted within the valve body. The bottom end of the threaded rod is connected to the gate, and its top end is threadedly connected to the handwheel via a support frame. A sludge collection box is installed at the bottom of the valve body, and the bottom of the valve body has an inverted bucket-shaped slot, through which the valve body communicates with the interior of the sludge collection box. The sludge collection box has an inlet on one side and a outlet on the other. A support plate is fixedly mounted on the upper part of the sludge collection box. Three guide rods are slidably mounted at equal intervals on the support plate, and a trapezoidal block for sealing the slot is fixedly mounted on the top of each guide rod. A spring is sleeved within each guide rod, and the spring is located between the trapezoidal block and the support plate. An annular seat is fixedly mounted at the connection between the valve body and the outlet valve, and a filter screen is installed in the annular seat.

[0006] Preferably, the bottom end of the guide rod is provided with a limiting ring.

[0007] Preferably, the trapezoidal block is provided with a protective plate on its outer side, and the protective plate is located on both sides of the support plate.

[0008] Preferably, the trapezoidal block has two symmetrical top columns at its top.

[0009] The beneficial effects of adopting the above technical solutions are: The filter screen filters out solid impurities from the liquid being transported. The filtered impurities accumulate on top of the trapezoidal block at the trough opening, thus completing the filtration process.

[0010] When the valve body is closed, the handwheel drives the threaded rod to rotate in the support frame, thereby driving the gate to slide in the valve body, thus closing the inlet and outlet valves. At the same time, the gate presses down on the two top pillars, causing the trapezoidal slider to disengage from the slot, allowing the filtered debris to be guided along the side of the trapezoidal block into the sludge collection box, thus preventing blockage at the inlet valve. When the inlet and outlet valves are opened, the handwheel drives the threaded rod to rotate, causing the gate to move upward. The trapezoidal block rebounds under the action of the spring and guide rod, causing the trapezoidal block to press against the slot, thus ensuring the sealing of the valve body and the stability of the knife gate valve operation.

[0011] By setting up water inlet and drain outlet, water is supplied through the water inlet to impact the inside of the sludge collection box, and the collected debris is discharged from the drain outlet, ensuring the stability of the equipment. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention from a frontal perspective.

[0013] Figure 2 This is a three-dimensional structural diagram of the present invention from a rear view.

[0014] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 4 This utility model Figure 3 A magnified structural diagram of part A in the diagram.

[0016] Figure 5 This is a three-dimensional structural diagram of the internal structure of the sludge collection box of this utility model.

[0017] Wherein: 1-valve body; 11-inlet valve; 12-outlet valve; 13-support frame; 14-slot; 15-ring seat; 16-filter screen; 2-gate; 3-threaded rod; 4-handwheel; 5-sludge collection box; 51-inlet; 52-drain outlet; 53-support plate; 54-guide rod; 541-limiting ring; 55-trapezoidal block; 551-top column; 552-protective plate; 56-spring. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-5 In this embodiment, an anti-clogging knife gate valve includes a valve body 1, a gate 2, a threaded rod 3, and a handwheel 4. An inlet valve 11 is provided on one side of the valve body 1, and an outlet valve 13 is provided on the other side. The gate 2 is slidably disposed within the valve body 1. The bottom end of the threaded rod 3 is connected to the gate 2, and its top end is threadedly connected to the handwheel 4 via a support frame 13. A sludge collection box 5 is installed at the bottom of the valve body 1. The bottom of the valve body 1 has an inverted bucket-shaped slot 14, through which the valve body 1 communicates with the interior of the sludge collection box 5. The sludge box 5 has an inlet 51 on one side and a drain 52 on the other side. A support plate 53 is fixedly installed in the upper part of the sludge box 5. Three guide rods 54 are slidably arranged at equal intervals on the support plate 53. A trapezoidal block 55 for sealing the slot 14 is fixedly installed on the top of the guide rods 54. A spring 56 is sleeved in the guide rods 54 and the spring 56 is located between the trapezoidal block 55 and the support plate 53. An annular seat 15 is fixedly installed in the valve body 1 at the connection with the outlet valve 11. A filter screen 16 is installed in the annular seat 15.

[0022] Through the above technical solution, in use, the valve body 1 is connected between two pipes via the inlet valve 11 and the outlet valve 12. The filter screen 16 filters impurities in the conveyed liquid, so that the filtered impurities are located at the slot 14 inside the valve body 1, above the trapezoidal block 55. When the valve body 1 is closed, the handwheel 4 drives the threaded rod 3 to rotate in the support frame 13, thereby driving the gate 2 to slide inside the valve body 1 to open and close the valve body 1. When the gate 2 moves downward, its bottom end abuts against the upper part of the trapezoidal block 55, thereby causing the trapezoidal block 55 to disengage from the slot 14. At this time, the filtered impurities slide down along the side of the trapezoidal block 55 and enter the collection box 5, thereby collecting the impurities. When the gate 2... After moving upwards and disengaging from the trapezoidal block 55, the trapezoidal block 55 moves upwards under the cooperation of the guide rod 54 and the spring 56, thereby pressing against the slot 14 to form a seal on the valve body 1, ensuring the stability of the knife gate valve. The annular seat 15 facilitates the installation and removal of the filter screen 16, and the filter screen 16 is located between the outlet valve 11 and the valve body 1, and thus the filter screen 16 is located on the rear side of the gate plate 2. Therefore, after the valve body 1 is closed, the filter screen 16 can be replaced and maintained simply by disassembling the outlet end 12 pipe, improving the convenience of the work. Through the setting of the inlet 51 and the outlet 52 at one end of the sludge collection box 5, external high-pressure water is flushed into the sludge collection box 5, and then the collected debris is flushed out from the outlet 52, thereby ensuring the stability of the sludge collection box 5.

[0023] Preferably, the bottom end of the guide rod 54 is provided with a limiting ring 541.

[0024] Through the above technical solution, the setting of the bottom limiting ring 541 of the guide rod 54 can prevent the guide rod 54 from detaching from the support plate 53, thereby ensuring the stability of the trapezoidal block 55.

[0025] Preferably, the trapezoidal block 55 is provided with a protective plate 551 on the outside, and the protective plate 551 is located on both sides of the support plate 53.

[0026] Through the above technical solution, the protective plate 551 can prevent debris from falling into the spring 56 when the trapezoidal block 55 moves, thus affecting the use of the spring 56.

[0027] Preferably, the top of the trapezoidal block 55 is symmetrically provided with two top pillars 552.

[0028] Through the above technical solution, the setting of the two top columns 552 at the top of the trapezoidal block 55 makes the bottom end of the gate plate 2 and the top of the trapezoidal block 55 form a cavity, which facilitates the discharge of accumulated debris from the slot 14 into the sludge collection box 5.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit the technical solutions described in this utility model. Therefore, although this specification has described this utility model in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model, and all technical solutions and improvements that do not depart from the spirit and scope of this utility model should be covered within the scope of the claims of this utility model; technologies not described in detail in this utility model are implemented using existing technologies.

Claims

1. A clog-resistant knife gate valve, comprising a valve body, a gate, a threaded rod, and a handwheel, characterized in that: The valve body has an inlet valve on one side and an outlet valve on the other side. The gate is slidably mounted in the valve body. The bottom end of the threaded rod is connected to the gate, and the top end is threadedly connected to the handwheel via a support frame. A sludge collection box is installed at the bottom of the valve body. The bottom of the valve body has an inverted bucket-shaped slot, and the valve body communicates with the inside of the sludge collection box through the slot. The sludge collection box has an inlet on one side and a drain on the other side. A support plate is fixedly mounted on the upper part of the sludge collection box. Three guide rods are slidably mounted at equal intervals on the support plate, and a trapezoidal block is fixedly mounted on the top of the guide rod to block the slot. A spring is sleeved in the guide rod, and the spring is located between the trapezoidal block and the support plate. An annular seat is fixedly mounted at the connection between the valve body and the outlet valve, and a filter screen is installed in the annular seat.

2. The anti-clogging knife gate valve according to claim 1, characterized in that: The bottom end of the guide rod is provided with a limiting ring.

3. The anti-clogging knife gate valve according to claim 1, characterized in that: The trapezoidal block is provided with a protective plate on its outer side, and the protective plate is located on both sides of the support plate.

4. The anti-clogging knife gate valve according to claim 1, characterized in that: The trapezoidal block has two symmetrical top pillars.

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