Gate valve capable of preventing medium from flowing back

Abstract

The utility model discloses a gate valve for preventing medium backflow, which comprises a gate valve component, a medium backflow prevention component and a desanding structure are embedded on the gate valve component, the desanding structure is positioned on the left side of the medium backflow prevention component, the gate valve component comprises a water inlet pipe, the right side of the water inlet pipe is communicated with a first gate valve base, and the right side of the first gate valve base is communicated with a drain pipe. The gate valve capable of preventing the medium from flowing back is provided with a medium backflow preventing assembly, a second handle is rotated to drive a second valve clack to rotate, the second valve clack seals a second valve seat, the first handle is fixed to the first valve clack, and the second handle is fixed to the second valve clack. Under the double-layer sealing effect of the second valve clack and the first valve clack, the sealing effect of the gate valve is ensured, medium backflow is prevented, impurity gravel is filtered through the arrangement of the two sets of sand removing nets, and the situation that the sealing effect of the first gate valve base and the first valve clack is affected due to the fact that impurities are deposited in the first gate valve base in the later period is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve for preventing medium backflow. Background Art

[0002] The gate valve is a gate disc of an opening and closing part. The movement direction of the gate disc is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate disc. Usually, the sealing surface is welded with metal materials to increase wear resistance. After the traditional gate valve is fully closed, the medium is prone to backflow and the sealing is poor. In addition, when the existing gate valve is working, the fluid medium contains a large amount of impurities, and the impurities are easily deposited in the slide groove on the gate valve base, affecting the sealing of the valve disc and the gate valve base. Utility Model Content

[0003] The purpose of the utility model is to provide a gate valve that prevents medium backflow to solve the problem proposed in the above background technology that the traditional gate valve is prone to medium backflow after being fully closed, has poor sealing performance, and when the existing gate valve is working, the fluid medium contains a large amount of impurities, which are easily deposited in the slide groove on the gate valve base, affecting the sealing performance of the valve disc and the gate valve base.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gate valve for preventing medium backflow, comprising a gate valve assembly, inlaid with a medium backflow prevention assembly and a sand removal structure on the gate valve assembly, the sand removal structure being located on the left side of the medium backflow prevention assembly, the gate valve assembly comprising a water inlet pipe, the right side of the water inlet pipe being connected to a first gate valve base, the right side of the first gate valve base being connected to a drain pipe, flanges being welded to both the drain pipe and the water inlet pipe, a first valve disc being slidingly sealed in the first gate valve base, and a first handle being fixed to the first valve disc.

[0005] Preferably, the medium backflow prevention component includes a second valve seat, a second valve flap is rotatably connected to the second valve seat, a second screw is fixed to the second valve flap, and a second handle is detachably mounted on the second screw.

[0006] By adopting the above technical solution, medium backflow is avoided by providing a medium backflow prevention component.

[0007] Preferably, the sand removal structure includes a sand removal net, a cleaning component is fixed on the sand removal net, and the impurity precipitation component is connected to the water inlet pipe.

[0008] Preferably, the cleaning assembly includes a motor box, a motor in the motor box drives the rotating rod to rotate, and the rotating rod rotates to drive the cleaning brush to rotate through the support plate, and a slider is fixed on the support plate.

[0009] By adopting the above technical solution, impurities are filtered by setting a cleaning component.

[0010] Preferably, the impurity precipitation component includes a precipitation tank, and a material receiving box is threadedly connected to the lower side of the precipitation tank.

[0011] By adopting the above technical solution, the impurities are precipitated by providing an impurity precipitation component.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the gate valve for preventing medium backflow

[0013] (1) A sand removal structure is provided to filter the impurities and gravel through the setting of two sets of sand removal nets to prevent the impurities from settling in the first gate valve base in the later stage, affecting the sealing effect between the first gate valve base and the first valve disc, thereby causing the medium to flow back. The filtered impurities are deposited in the material receiving box at the lower side of the sedimentation tank, which is convenient for unified treatment in the later stage;

[0014] (2) A medium backflow prevention component is provided. The operator rotates the second handle to drive the second valve disc to rotate, and the second valve disc seals the second valve seat. Under the double-layer sealing action of the second valve disc and the first valve disc, the gate valve sealing effect is ensured to prevent medium backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a rear view structural diagram of the utility model;

[0017] Figure 3 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the gate valve assembly of the present utility model.

[0019] In the figure: 1. Gate valve assembly; 11. Water inlet pipe; 12. First gate valve base; 13. Drain pipe; 14. First valve disc; 15. First screw; 16. First handle; 17. Flange; 2. Anti-medium backflow assembly; 21. Second valve seat; 22. Second valve disc; 23. Second screw; 24. Second handle; 3. Sand removal structure; 31. Sand removal net; 32. Cleaning assembly; 321. Motor box; 322. Rotating rod; 323. Support plate; 324. Cleaning brush; 325. Slider; 33. Impurity precipitation assembly; 331. Sedimentation tank; 332. Material receiving box. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 The utility model provides a technical solution: a gate valve to prevent medium backflow Figure 1 、 Figure 2 and Figure 4 As shown, the gate valve assembly 1 includes a water inlet pipe 11. The right side of the water inlet pipe 11 is connected to the first gate valve base 12. The right side of the first gate valve base 12 is connected to the drain pipe 13. Flanges 17 are welded to the drain pipe 13 and the water inlet pipe 11. A first valve disc 14 is slidingly and sealingly connected to the first gate valve base 12. A first handle 16 is fixed to the first valve disc 14.

[0022] Among them, the flange 17 is provided with six groups of threaded holes of the same inner diameter, and the six groups of threaded holes are used to disassemble and install other flanges 17 through bolts;

[0023] In the above scheme, the operator rotates the first handle 16 counterclockwise, and the rotation of the first handle 16 drives the first screw 15 to rotate, and the rotation of the first screw 15 drives the first valve disc 14 to move upward. The first valve disc 14 moves upward to the required position, and the medium enters the first gate valve base 12 through the water inlet pipe 11, and the medium flows into the drain pipe 13 through the first gate valve base 12 and is discharged. Similarly, when the first handle 16 is rotated clockwise, the first valve disc 14 closes the water inlet of the first gate valve base 12.

[0024] like Figure 1 Figure 2 As shown, the gate valve assembly 1 is inlaid with a medium backflow prevention assembly 2 and a sand removal structure 3. The medium backflow prevention assembly 2 includes a second valve seat 21, a second valve disc 22 is rotatably connected to the second valve seat 21, a second screw 23 is fixed to the second valve disc 22, and a second handle 24 is detachably mounted on the second screw 23;

[0025] The second valve disc 22 is a ball valve disc.

[0026] In the above solution, the staff rotates the second handle 24, which drives the second screw 23 to rotate, and the second valve flap 22 to rotate. The second valve flap 22 seals the second valve seat 21 to prevent the medium from flowing back.

[0027] like Figure 1 、 Figure 2 and Figure 3 As shown, the sand removal structure 3 is located on the left side of the anti-medium backflow component 2. The sand removal structure 3 includes a sand removal net 31. A cleaning component 32 is fixed on the sand removal net 31. The impurity precipitation component 33 is connected to the water inlet pipe 11. The cleaning component 32 includes a motor box 321. The motor in the motor box 321 drives the rotating rod 322 to rotate. The rotating rod 322 rotates through the support plate 323 to drive the cleaning brush 324 to rotate. A slider 325 is fixed on the support plate 323. The impurity precipitation component 33 includes a precipitation tank 331. The lower side of the precipitation tank 331 is threadedly connected to a material receiving box 332.

[0028] There are two groups of sand removal nets 31, and the mesh density of the two groups of sand removal nets 31 is different. A chute is opened on the sand removal net 31, and a slider 325 is slidably connected in the chute.

[0029] Specifically, the motor in the motor box 321 is a double-headed motor, and two sets of support plates 323 and cleaning brushes 324 are provided. The two sets of support plates 323 and cleaning brushes 324 are symmetrically arranged about the central axis of the sand removal net 31;

[0030] Furthermore, three groups of sedimentation tanks 331 are provided. The lower sides of the three groups of sedimentation tanks 331 are all arranged in an annular shape. A sealing ring is provided between the sedimentation tank 331 and the material receiving box 332 to prevent water leakage. A transparent observation hole is provided on the material receiving box 332 to facilitate the operator to observe the amount of impurities in real time.

[0031] In the above solution, impurities in the medium are filtered with the assistance of the sand removal net 31. The impurities that pass through the filter are deposited in the material receiving box 332 through the sedimentation tank 331. The material receiving box 332 is rotated to separate the material receiving box 332 from the sedimentation tank 331, thereby facilitating the subsequent processing of the impurities. With the assistance of the double-headed motor in the motor box 321, the rotating rod 322 is driven to rotate. The rotation of the rotating rod 322 drives the cleaning brush 324 on the support plate 323 to clean the left and right sides of the sand removal net 31 simultaneously, thereby ensuring the cleaning effect. The slider 325 slides in the slide groove provided on the sand removal net 31, thereby limiting the cleaning brush 324.

[0032] Working principle: When using the gate valve to prevent medium backflow, the valve is opened or closed with the assistance of the gate valve assembly 1, the drain pipe 13 is assisted in sealing with the assistance of the anti-medium backflow assembly 2, and the impurities entering the first gate valve base 12 are filtered with the assistance of the sand removal structure 3.

[0033] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gate valve for preventing medium backflow, comprising a gate valve assembly (1), wherein the gate valve assembly (1) is inlaid with a medium backflow prevention assembly (2) and a sand removal structure (3), wherein the sand removal structure (3) is located on the left side of the medium backflow prevention assembly (2), and is characterized in that: The gate valve assembly (1) comprises a water inlet pipe (11), the right side of the water inlet pipe (11) is connected to a first gate valve base (12), the right side of the first gate valve base (12) is connected to a drain pipe (13), a flange (17) is welded to the drain pipe (13) and the water inlet pipe (11), a first valve disc (14) is connected in a sliding sealing manner in the first gate valve base (12), and a first handle (16) is fixed to the first valve disc (14).

2. A gate valve for preventing medium backflow according to claim 1, characterized in that: The medium backflow prevention assembly (2) comprises a second valve seat (21), a second valve flap (22) is rotatably connected to the second valve seat (21), a second screw rod (23) is fixed to the second valve flap (22), and a second handle (24) is detachably mounted on the second screw rod (23).

3. A gate valve for preventing medium backflow according to claim 1, characterized in that: The sand removal structure (3) comprises a sand removal net (31), a cleaning component (32) is fixed on the sand removal net (31), and an impurity precipitation component (33) is communicated with the water inlet pipe (11).

4. A gate valve for preventing medium backflow according to claim 3, characterized in that: The cleaning assembly (32) includes a motor box (321). A motor in the motor box (321) drives a rotating rod (322) to rotate. The rotating rod (322) rotates to drive a cleaning brush (324) to rotate via a support plate (323). A slider (325) is fixed on the support plate (323).

5. The gate valve for preventing medium backflow according to claim 3, characterized in that: The impurity precipitation assembly (33) comprises a precipitation tank (331), and a material receiving box (332) is threadedly connected to the lower side of the precipitation tank (331).

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