Gate valve adopting soft seal

Abstract

The utility model relates to the technical field of gate valves, in particular to a gate valve adopting soft sealing, which comprises a valve seat and a valve plate, a rubber ring A for improving sealing performance is fixed on the outer side of the valve plate through screws, a support block connected with a rubber ring B is fixed on one side of the rubber ring A through screws, and fixing rods for supporting the rubber ring A and the rubber ring B are respectively fixed on the outer side of the valve plate through screws. A filter screen for filtering liquid is fixed on the inner side of the valve seat through a screw; through the arrangement of the rubber ring A, the rubber ring B, the supporting block and the fixing rod, the problem that when an existing gate valve is used, the sealing performance between the valve plate and the inner wall of the valve seat cannot be improved is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, and particularly relates to a gate valve adopting soft sealing. Background Art

[0002] A gate valve is a closing member, a gate plate. The moving direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed. It varies according to the valve parameters, usually 5°, and 2°52' when the medium temperature is not high. To improve its processability and make up for the deviation generated during the machining of the sealing surface angle, this kind of gate plate is called an elastic gate plate.

[0003] The patent number 98250963.4 discloses a gate valve, which has the advantages of simple structure, light weight, long service life and low cost, thus ensuring the reliable and effective operation of the gate valve.

[0004] However, when the existing gate valve is in use, it usually realizes sealing by the contact between the valve plate and the valve seat. However, due to the long-term contact between the valve plate and the valve seat, the valve plate and the valve seat will be worn, and gaps will be generated between the valve plate and the valve seat. The liquid will flow through the gaps between the valve plate and the valve seat, which will have a certain impact on the sealing performance of the gate valve. Therefore, a gate valve adopting soft sealing is provided. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a gate valve adopting soft sealing. By setting rubber ring A, rubber ring B, support blocks and fixing rods, the utility model solves the problem that the existing gate valve cannot improve the sealing performance between the valve plate and the inner wall of the valve seat when in use.

[0006] The technical solution adopted by the utility model to solve its technical problems is a gate valve adopting soft sealing, including a valve seat and a valve plate. A rubber ring A for improving sealing performance is fixed on the outside of the valve plate by screws. A support block connecting the rubber ring B is fixed on one side of the rubber ring A by screws. Fixing rods for supporting the rubber ring A and the rubber ring B are respectively fixed on the outside of the valve plate by screws. A filter screen for filtering liquid is fixed on the inner side of the valve seat by screws.

[0007] By adopting the above technical solution, when the gate valve is closed, the valve plate rotates in the valve seat, and then the rubber ring A outside the valve plate contacts the inner wall of the valve seat, so that the valve plate and the valve seat are sealed. Subsequently, the rubber ring B on the support block outside the rubber ring A further improves the sealing performance between the valve plate and the valve seat. At the same time, the fixing rods welded outside the valve plate support the rubber ring A and the rubber ring B, preventing the rubber ring A and the rubber ring B from deforming, thereby improving the sealing performance between the valve plate and the inner wall of the valve seat;

[0008] When the liquid enters the valve seat inside the gate valve, the filter screen in the valve seat filters the foreign matters in the liquid, preventing the foreign matters in the liquid from adhering to the valve plate, preventing the valve plate from being corroded, and improving the service life of the valve plate.

[0009] Specifically, a drive rod for driving the support rod to rotate is rotatably connected inside the valve seat, and a fixing plate for flapping the filter screen is welded to the outside of the support rod.

[0010] By adopting the above technical solution, when the liquid flows through the valve seat, the liquid drives the support rod on the fixed rod to rotate, and then the support rod drives the fixing plate to contact the filter screen. Subsequently, after the filter screen is flapped by the fixing plate, the foreign matters on the filter screen will fall off, thereby avoiding the blockage of the filter screen.

[0011] Specifically, a fixing box for collecting foreign matters on the filter screen is fixed to the outside of the valve seat by screws.

[0012] By adopting the above technical solution, when the foreign matters on the filter screen fall off, the fixing box outside the valve seat collects the foreign matters falling on the filter screen, and the inside of the fixing box is cleaned regularly to avoid excessive foreign matters remaining in the valve seat.

[0013] Specifically, a groove for allowing the foreign matters on the filter screen to enter the fixing box is formed on the inner wall of the valve seat.

[0014] By adopting the above technical solution, when the foreign matters on the filter screen fall on the bottom end inside the valve seat, the foreign matters enter the inside of the fixing box through the groove, thereby facilitating the transportation of the foreign matters falling on the filter screen into the fixing box.

[0015] Specifically, a rubber pad for improving the sealing performance between the valve seat and the pipeline is glued to one side of the valve seat.

[0016] By adopting the above technical solution, when the valve seat is connected to the pipeline, the rubber pad outside the valve seat contacts the pipeline, improving the sealing performance between the valve seat and the pipeline.

[0017] The beneficial effects of the present utility model:

[0018] (1) For the gate valve with soft seal described in the present utility model, when the gate valve is closed, the valve plate inside the valve seat rotates, and then the rubber ring A outside the valve plate contacts the inner wall of the valve seat to seal the valve plate and the valve seat. Subsequently, the rubber ring B on the support block outside the rubber ring A further improves the sealing performance between the valve plate and the valve seat. At the same time, the fixing rod welded to the outside of the valve plate supports the rubber ring A and the rubber ring B to prevent the rubber ring A and the rubber ring B from deforming, thereby improving the sealing performance between the valve plate and the inner wall of the valve seat; when the liquid enters the valve seat inside the gate valve, the filter screen inside the valve seat filters the foreign matters in the liquid, avoiding the adhesion of the foreign matters in the liquid on the valve plate, preventing the valve plate from being corroded, and prolonging the service life of the valve plate.

[0019] (2) For the gate valve with soft seal of the present utility model, when the liquid flows through the valve seat, the liquid drives the support rod on the fixed rod to rotate. Subsequently, the support rod drives the fixed plate to contact the filter screen. After the filter screen is slapped by the fixed plate, the foreign objects on the filter screen will fall off, thus avoiding blockage of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 is a schematic diagram of the overall structure of the gate valve with soft seal of the present utility model;

[0022] Figure 2 is a schematic diagram of the internal structure of the valve seat of the gate valve with soft seal of the present utility model;

[0023] In the figure: 1, valve seat; 2, rubber gasket; 3, filter screen; 4, support rod; 5, fixed plate; 6, drive rod; 7, rubber ring A; 8, fixed rod; 9, valve plate; 10, support block; 11, rubber ring B; 12, fixed box; 13, groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In order to improve the sealing performance between the valve plate 9 and the inner wall of the valve seat 1, as an embodiment of the present utility model, as Figure 1 , Figure 2 shown, the gate valve with soft seal of the present utility model includes a valve seat 1 and a valve plate 9. A rubber ring A 7 for improving the sealing performance is fixed to the outside of the valve plate 9 by screws. A support block 10 connecting the rubber ring B 11 is fixed to one side of the rubber ring A 7 by screws. Fixed rods 8 for supporting the rubber ring A 7 and the rubber ring B 11 are respectively fixed to the outside of the valve plate 9 by screws. A filter screen 3 for filtering the liquid is fixed to the inside of the valve seat 1 by screws.

[0026] During use, when the gate valve is closed, the valve plate 9 in the valve seat 1 rotates. Then, the rubber ring A 7 outside the valve plate 9 contacts the inner wall of the valve seat 1, so that the valve plate 9 and the valve seat 1 are sealed. Subsequently, the rubber ring B 11 on the support block 10 outside the rubber ring A 7 further improves the sealing performance between the valve plate 9 and the valve seat 1. At the same time, the fixed rods 8 welded to the outside of the valve plate 9 support the rubber ring A 7 and the rubber ring B 11, avoiding deformation of the rubber ring A 7 and the rubber ring B 11, thereby improving the sealing performance between the valve plate 9 and the inner wall of the valve seat 1;

[0027] When liquid enters the inside of the valve seat 1 of the gate valve, the filter screen 3 inside the valve seat 1 filters foreign matters in the liquid, preventing foreign matters in the liquid from adhering to the valve plate 9, preventing corrosion of the valve plate 9, and extending the service life of the valve plate 9.

[0028] To avoid clogging of the filter screen 3, for example, as Figure 2 shown, the present utility model further includes a drive rod 6 rotatably connected inside the valve seat 1 to drive the support rod 4 to rotate, and a fixing plate 5 for flapping the filter screen 3 is welded to the outside of the support rod 4.

[0029] During use, when the liquid flows through the valve seat 1, the liquid drives the support rod 4 on the fixing rod 8 to rotate. Subsequently, the support rod 4 drives the fixing plate 5 to contact the filter screen 3. After the filter screen 3 is flapped by the fixing plate 5, the foreign matters on the filter screen 3 will fall off, thus avoiding clogging of the filter screen 3.

[0030] To collect the foreign matters that fall off the filter screen 3, for example, as Figure 1 shown, the present utility model further includes a fixing box 12 screwed to the outside of the valve seat 1 to collect foreign matters on the filter screen 3.

[0031] During use, when the foreign matters on the filter screen 3 fall off, the fixing box 12 outside the valve seat 1 collects the foreign matters that fall off the filter screen 3, and the inside of the fixing box 12 is cleaned regularly to avoid excessive foreign matters remaining in the valve seat 1.

[0032] To convey the foreign matters that fall off the filter screen 3 into the fixing box 12, for example, as Figure 1 shown, the present utility model further includes a groove 13 formed on the inner wall of the valve seat 1 to allow foreign matters on the filter screen 3 to enter the fixing box 12.

[0033] During use, when the foreign matters on the filter screen 3 fall to the bottom end inside the valve seat 1, the foreign matters enter the inside of the fixing box 12 through the groove 13, thus facilitating the conveyance of the foreign matters that fall off the filter screen 3 into the fixing box 12.

[0034] To improve the sealing performance between the valve seat 1 and the pipeline, for example, as Figure 1 shown, the present utility model further includes a rubber pad 2 adhered to one side of the valve seat 1 to improve the sealing performance between the valve seat 1 and the pipeline.

[0035] During use, when the valve seat 1 is connected to the pipeline, the rubber pad 2 outside the valve seat 1 contacts the pipeline, improving the sealing performance between the valve seat 1 and the pipeline.

[0036] When the utility model is in use, when the gate valve is closed, the valve plate 9 in the valve seat 1 rotates, and then the rubber ring A7 outside the valve plate 9 contacts the inner wall of the valve seat 1, so that the valve plate 9 and the valve seat 1 are sealed. Subsequently, the rubber ring B11 on the support block 10 outside the rubber ring A7 further improves the sealing performance between the valve plate 9 and the valve seat 1. At the same time, the fixing rod 8 welded outside the valve plate 9 supports the rubber ring A7 and the rubber ring B11, avoiding deformation of the rubber ring A7 and the rubber ring B11, thereby improving the sealing performance between the valve plate 9 and the inner wall of the valve seat 1;

[0037] When liquid enters the inside of the valve seat 1 of the gate valve, the filter screen 3 in the valve seat 1 filters foreign matters in the liquid, avoiding the adhesion of foreign matters in the liquid on the valve plate 9, preventing corrosion of the valve plate 9, and improving the service life of the valve plate 9;

[0038] When the liquid flows through the valve seat 1, the liquid drives the support rod 4 on the fixing rod 8 to rotate. Subsequently, the support rod 4 drives the fixing plate 5 to contact the filter screen 3. After the filter screen 3 is slapped by the fixing plate 5, the foreign matters on the filter screen 3 will fall off, thus avoiding blockage of the filter screen 3;

[0039] When the foreign matters on the filter screen 3 fall off, the fixing box 12 outside the valve seat 1 collects the foreign matters falling on the filter screen 3, and regularly cleans the inside of the fixing box 12 to avoid excessive foreign matters remaining in the valve seat 1;

[0040] When the foreign matters on the filter screen 3 fall to the bottom end inside the valve seat 1, the foreign matters enter the inside of the fixing box 12 through the groove 13, so as to facilitate the transportation of the foreign matters falling on the filter screen 3 into the fixing box 12;

[0041] When the valve seat 1 is connected to the pipeline, the rubber pad 2 outside the valve seat 1 contacts the pipeline, improving the sealing performance between the valve seat 1 and the pipeline.

[0042] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A gate valve using soft seal, characterized in that, It includes a valve seat (1) and a valve plate (9). A rubber ring A (7) for improving the sealing performance is fixed to the outside of the valve plate (9) by screws. A support block (10) connecting the rubber ring B (11) is fixed to one side of the rubber ring A (7) by screws. Fixing rods (8) for supporting the rubber ring A (7) and the rubber ring B (11) are respectively fixed to the outside of the valve plate (9) by screws. A filter screen (3) for filtering liquid is fixed to the inside of the valve seat (1) by screws.

2. The gate valve with soft seal according to claim 1, characterized in that, A drive rod (6) that drives a support rod (4) to rotate is rotatably connected inside the valve seat (1). A fixing plate (5) for flapping the filter screen (3) is welded to the outside of the support rod (4).

3. The gate valve with soft seal according to claim 1, characterized in that, A fixing box (12) for collecting foreign matters on the filter screen (3) is fixed to the outside of the valve seat (1) by screws.

4. The gate valve using soft seal according to claim 1, characterized in that, A groove (13) through which foreign matters on the filter screen (3) enter the fixing box (12) is formed in the inner wall of the valve seat (1).

5. A gate valve with soft seal according to claim 1, characterized in that, A rubber pad (2) for improving the sealing performance between the valve seat (1) and the pipeline is adhered to one side of the valve seat (1).

Images