Flow-adjustable wear-resistant gate valve with novel polyurethane wear-resistant layers

Abstract

The invention relates to the technical field of gate valves, in particular to a flow-adjustable wear-resistant gate valve with novel polyurethane wear-resistant layers. The flow-adjustable wear-resistant gate valve comprises a lower valve body, an upper valve body is mounted on the upper surface of the lower valve body, valve plate sliding grooves are formed inside the lower valve body and the upper valve body, valve plates are slidably mounted inside the valve plate sliding grooves, a valve rod is rotatably mounted on the upper surfaces of the valve plates, a valve seat is mounted on the upper surface of the upper valve body, sealing rings are mounted on the front portion and the rear portion of the lower valve body correspondingly, wear-resisting layers are arranged on the inner sides of the sealing rings, elastic pieces are mounted on the front outer surfaces and the rear outer surfaces of the valve plates correspondingly, rebound openings are formed in the positions of the rear surfaces of the elastic pieces inside the valve plates, and an inserting plate is welded to the lower surface of the upper valve body. According to the flow-adjustable wear-resistant gate valve with the novel polyurethane wear-resistant layers, the protruding elastic pieces are arranged on the gate plate, the wear-resistant layers made of vulcanized rubber are arranged on the inner side of a polyurethane ring, the rolling wheels are arranged on the two sides of the gate plate, and the upper end of the gate plate is sealed inside the valve body.

Description

technical field [0001] The invention relates to the technical field of gate valves, in particular to an adjustable flow wear-resistant gate valve with a novel polyurethane wear-resistant layer. Background technique [0002] The gate valve is an opening and closing gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The gate valve is sealed by the contact between the valve seat and the gate. Polyurethane, The full name is polyurethane, which is a kind of polymer compound. They can be made into polyurethane plastic, polyurethane fiber, polyurethane rubber and elastomer, and polyurethane aprons are used in gate valves for sealing. [0003] A Chinese patent discloses a gate valve with strong wear resistance (authorized notification number CN210034489U). This patented technology can effectively prevent the valve plate from being worn and cause th...

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Problems solved by technology

[0003] A Chinese patent discloses a gate valve with strong wear resistance (authorized notification number CN210034489U). This patented technology can effectively prevent the valve plate from being worn and cause the sealing performance to decrease and cause water leakage. However, the gate valve in the above device is innovative, but The poor thickness of the gate is not conducive to reducing the thickness of the gate valve. The above-mentioned middle gate slides directly inside the valve body, and the smoothness of sliding is low, which is not conducive to the smoothness of gate opening and closing. Generally, the gate and through hole The sealing effect of the seal is poor, which is not conducive to the tightness of the gate valve after it is closed. Although the above-mentioned device has an elastic layer, it cannot essentially provide a good seal, but it increases the opening and closing resistance of the gate. The gate of the above-mentioned device The upper end is exposed to the outside of the valve body, and there will be air leakage in the gap after opening

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