A gate valve with sand prevention mechanism

Abstract

The utility model discloses a gate valve with a sand prevention mechanism, comprising a valve body and a valve cover, wherein the valve cover is arranged at the upper end of the valve cover, a valve disc is arranged between two water pipes of the valve body, a valve stem rotatably connected to the valve disc is arranged in the valve cover, and a hand wheel fixedly connected to the top end of the valve stem is arranged at the upper end of the valve cover; a cleaning bin is arranged at the lower end of the valve body, a liftable water baffle is arranged in the cleaning bin, the water baffle is arranged just below the valve disc, the bottom surface of the water baffle is rotatably connected to the top end of the top screw through a connecting head, and a hexagonal screw head is arranged after the top screw passes downward through the bottom plate of the cleaning bin; the top screw is threadedly matched with the bottom plate. The utility model has a gate valve with a sand prevention mechanism, which has a simple structure and ingenious design, and effectively solves the problem that the valve body of the existing gate valve with sand prevention function is an integrated structure, which is not conducive to the cleaning of the valve body in the later stage and brings certain inconveniences to the use process.

Description

Technical Field

[0001] The utility model relates to the field of gate valves, in particular to a gate valve with a sand prevention mechanism. Background Art

[0002] Sand entering the valve cavity is the main factor leading to the failure of the gate valve to close. It mainly occurs when the gate valve is in the closed state. Sand enters the valve cavity through the gap between the gate and the valve seat and accumulates at the bottom of the valve cavity. When it is closed again, the valve plate cannot completely reach the bottom, causing the valve plate hole to be unable to align with the valve seat hole, leaving a small gap. When high-pressure, high-speed, and highly erosive fluid passes through, an aperture throttling effect is formed, which is bound to cause rapid erosion and wear of the valve seat and valve plate. The patent document with application number 202111465351.6 discloses a reliable flat gate valve with sand prevention function, which reduces the accumulation of sand and gravel, reduces the torque during valve plate position adjustment, reduces the friction loss of the device, and increases the service life of the device. However, the valve body of the device is an integrated structure, which is not conducive to the cleaning of the valve body in the later stage, and brings certain inconveniences to the use process. Therefore, how to develop a gate valve with a sand prevention mechanism has become a problem that needs to be solved urgently by technicians in this field. Utility Model Content

[0003] The utility model aims to provide a gate valve with a sand prevention mechanism, which solves the problem that the valve body of the existing gate valve with sand prevention function is an integrated structure, which is not conducive to the cleaning of the valve body at a later stage and brings certain inconveniences during use.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a gate valve with a sand prevention mechanism, comprising a valve body and a valve cover, wherein the valve cover is arranged at the upper end of the valve cover, a valve disc is arranged between two water pipes of the valve body, a valve stem rotatably connected to the valve disc is arranged in the valve cover, and a hand wheel fixedly connected to the top end of the valve stem is arranged at the upper end of the valve cover; a cleaning chamber is arranged at the lower end of the valve body, a liftable water retaining plate is arranged in the cleaning chamber, and the water retaining plate is arranged directly below the valve disc.

[0006] Furthermore, the flange at the lower end of the valve cover and the flange at the upper end of the valve body are matched by connecting bolts.

[0007] Furthermore, the valve stem is threadedly matched with the inner wall of the valve cover.

[0008] Furthermore, the bottom surface of the water baffle is rotatably connected to the top of the top screw through a connecting head, and the top screw is provided with a hexagonal screw head after passing downward through the bottom plate of the cleaning bin; the top screw is threadedly matched with the bottom plate.

[0009] Furthermore, the bottom plate is fixedly arranged at the bottom end of the cleaning bin.

[0010] Furthermore, a step cooperating with the water baffle is provided between the cleaning chamber and the valve body.

[0011] Furthermore, a gasket cooperating with the step is provided on the upper surface of the water baffle.

[0012] Furthermore, sealing gaskets matching the left and right end surfaces of the valve disc are arranged in the two water pipes of the valve body.

[0013] Furthermore, water pipes are provided at the left and right ends of the cleaning bin, and detachable plugs are provided on the water pipes.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are:

[0015] The gate valve with a sand prevention mechanism of the utility model deposits gravel on the water retaining plate by setting a cleaning chamber at the bottom of the valve body, thereby preventing the gravel from affecting the closure of the valve flap; the gate valve with a sand prevention mechanism of the utility model can open and close the water retaining plate through the top screw to store the gravel in the cleaning chamber, thereby preventing the excessive accumulation of gravel from affecting the operation of the valve flap; the gate valve with a sand prevention mechanism of the utility model can clean the cleaning chamber after opening the plug of the water pipe of the cleaning chamber and connecting the water pipe, thereby preventing the excessive accumulation of gravel. In general, the gate valve with a sand prevention mechanism of the utility model has a simple structure and a clever design, which effectively solves the problem that the valve body of the existing gate valve with a sand prevention function is an integrated structure, which is not conducive to the cleaning of the valve body in the later stage and brings certain inconveniences to the use process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 This is a front view of the gate valve with a sand prevention mechanism of the utility model;

[0018] Figure 2 This is a cross-sectional view of a gate valve with a sand prevention mechanism according to the utility model;

[0019] Figure 3 This is a schematic diagram of the cleaning principle of the gate valve with a sand prevention mechanism of the utility model (state one);

[0020] Figure 4 This is a schematic diagram of the cleaning principle of the gate valve with a sand prevention mechanism of the utility model (state two).

[0021] Explanation of the reference numerals: 1. valve body; 101. sealing gasket; 102. cleaning chamber; 103. water pipe; 104. plug; 105. step; 2. valve disc; 3. valve stem; 4. hand wheel; 5. valve cover; 501. connecting bolt; 6. water baffle; 601. gasket; 602. connecting head; 603. top screw; 604. bottom plate. DETAILED DESCRIPTION

[0022] like Figures 1 to 4 As shown, a gate valve with a sand prevention mechanism includes a valve body 1 and a valve cover 5, wherein the valve cover 5 is arranged at the upper end of the valve cover 5. Specifically, a flange at the lower end of the valve cover 5 is matched with a flange at the upper end of the valve body 1 through connecting bolts 501.

[0023] A valve flap 2 is arranged between the two water pipes of the valve body 1, and sealing gaskets 101 are arranged in the two water pipes of the valve body 1 to match the left and right end surfaces of the valve flap 2. A valve stem 3 rotatably connected to the valve flap 2 is arranged in the valve cover 5, and the valve stem 3 is threadedly matched with the inner wall of the valve cover 5. A hand wheel 4 fixedly connected to the top of the valve stem 3 is arranged at the upper end of the valve cover 5. By rotating the hand wheel 4, the valve stem 3 can drive the valve flap 2 to rise and fall.

[0024] A cleaning chamber 102 is disposed at the lower end of the valve body 1 , and a liftable water baffle plate 6 is disposed in the cleaning chamber 102 . The water baffle plate 6 is disposed just below the valve flap 2 .

[0025] The bottom surface of the water retaining plate 6 is rotatably connected to the top of the top screw 603 through a connector 602 . The top screw 603 passes downward through the bottom plate 604 of the cleaning bin 102 and is provided with a hexagonal screw head. The top screw 603 is threadedly matched with the bottom plate 604 .

[0026] The bottom plate 604 is fixedly disposed at the bottom end of the cleaning chamber 102 .

[0027] A step 105 is provided between the cleaning chamber 102 and the valve body 1 to cooperate with the water baffle 6.

[0028] A gasket 601 that cooperates with the step 105 is provided on the upper surface of the water retaining plate 6 .

[0029] Water pipes 103 are provided at the left and right ends of the cleaning chamber 102 , and detachable plugs 104 are provided on the water pipes 103 .

[0030] The gate valve with the sand prevention mechanism of the utility model can store gravel in the cleaning bin 102 by regularly opening and closing the water retaining plate 6 through the top screw 603, so as to prevent the gravel from being excessively accumulated and affecting the operation of the valve flap 2.

[0031] The gate valve with the sand prevention mechanism of the utility model can clean the cleaning chamber 102 by opening the plug 104 of the water pipe 103 of the cleaning chamber 102 and connecting the water pipe to avoid excessive accumulation of sand and gravel.

[0032] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A gate valve with a sand prevention mechanism, characterized in that: The invention comprises a valve body (1) and a valve cover (5), wherein the valve cover (5) is arranged at the upper end of the valve cover (5), a valve flap (2) is arranged between two water pipes of the valve body (1), a valve stem (3) rotatably connected to the valve flap (2) is arranged inside the valve cover (5), and a hand wheel (4) fixedly connected to the top end of the valve stem (3) is arranged at the upper end of the valve cover (5); a cleaning chamber (102) is arranged at the lower end of the valve body (1), a water baffle (6) which can be raised and lowered is arranged inside the cleaning chamber (102), and the water baffle (6) is arranged directly below the valve flap (2).

2. The gate valve with sand prevention mechanism according to claim 1, characterized in that: The flange at the lower end of the valve cover (5) is matched with the flange at the upper end of the valve body (1) via connecting bolts (501).

3. The gate valve with sand prevention mechanism according to claim 1, characterized in that: The valve stem (3) is threadably matched with the inner wall of the valve cover (5).

4. The gate valve with sand prevention mechanism according to claim 1, characterized in that: The bottom surface of the water baffle (6) is rotatably connected to the top of a top screw (603) via a connector (602); the top screw (603) is provided with a hexagonal screw head after passing downward through the bottom plate (604) of the cleaning bin (102); the top screw (603) is threadedly matched with the bottom plate (604).

5. The gate valve with sand prevention mechanism according to claim 4, characterized in that: The bottom plate (604) is fixedly arranged at the bottom end of the cleaning chamber (102).

6. The gate valve with sand prevention mechanism according to claim 1, characterized in that: A step (105) that cooperates with the water baffle (6) is provided between the cleaning chamber (102) and the valve body (1).

7. The gate valve with sand prevention mechanism according to claim 6, characterized in that: The upper surface of the water retaining plate (6) is provided with a gasket (601) that cooperates with the step (105).

8. The gate valve with sand prevention mechanism according to claim 1, characterized in that: Sealing gaskets (101) matching the left and right end surfaces of the valve flap (2) are arranged in the two water pipes of the valve body (1).

9. The gate valve with sand prevention mechanism according to claim 1, characterized in that: Water pipes (103) are provided at the left and right ends of the cleaning chamber (102), and detachable plugs (104) are provided on the water pipes (103).

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