Gate valve with good sealing effect

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a gate valve with a good sealing effect, which comprises a valve seat, valve bodies communicated with the valve seat are arranged on two sides of the lower portion of the valve seat, and valve body sealing devices are arranged in the valve bodies in a sliding mode. Sealing valve rings in sealing fit with the sealing valve body device are fixedly arranged on the left inner wall and the right inner wall of the lower portion of the valve seat, a threaded valve rod is rotationally arranged at the top of the sealing valve body device, and the top of the threaded valve rod penetrates through the top of the valve seat and is rotationally connected with the valve seat. When the valve plate body descends, the wedge-shaped block is inserted into the tensioning seam, the valve plate body deforms, the left side face and the right side face of the valve plate body make close contact with the sealing valve rings and extrude the sealing valve rings, the sealing performance of the gate valve in the using process is ensured, and the problems that the valve plate is abraded or deformed due to long-term use, and the sealing performance becomes poor are completely eradicated.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a gate valve with good sealing effect. Background Art

[0002] A gate valve is a gate-shaped valve used to cut off and regulate flow. It features low fluid resistance and a small opening and closing torque. The gate valve's opening and closing member is the gate disc, which moves perpendicular to the direction of the fluid. A gate valve can only be fully opened or fully closed and cannot be regulated or throttled. The gate disc has two sealing surfaces, and the most commonly used type is a gate valve in which the two sealing surfaces form a wedge shape. When the gate valve is closed, the sealing surface can be sealed solely by medium pressure, which presses the gate disc's sealing surface against the valve seat on the other side to ensure the sealing surface is sealed. This is known as self-sealing. Most gate valves use forced sealing, meaning that when the valve is closed, an external force is used to forcibly press the gate disc against the valve seat to ensure the sealing surface is sealed.

[0003] There is relative friction between the sealing surfaces of the existing gate valve, which will cause the valve plate to wear or deform after long-term use, resulting in poor sealing performance of the two sealing surfaces and affecting the sealing effect. Utility Model Content

[0004] The purpose of the utility model is to provide a gate valve with good sealing effect.

[0005] A gate valve with good sealing effect includes a valve seat, and a valve body connected to the valve seat is provided on both sides of the lower part of the valve seat, a sealing valve body device is slidably provided in the valve body, and sealing valve rings that seal with the sealing valve body device are fixedly provided on the left and right inner walls of the lower part of the valve seat, and a threaded valve stem is rotatably provided on the top of the sealing valve body device. The top of the threaded valve stem passes through the top of the valve seat and is rotatably connected to it.

[0006] Furthermore, the sealing valve body device includes a valve plate body, the left and right side surfaces of the valve plate body are in contact with the sealing valve ring, the top of the valve plate body is rotatably connected to the threaded valve stem, a tightening gap is opened at the center of the lower part of the valve plate body, and a wedge block that cooperates with the tightening gap is fixedly provided at the bottom center of the valve seat.

[0007] Furthermore, sealing rings are fixedly provided on the side walls of the valve plate body on both sides of the expansion gap.

[0008] Furthermore, a handle is fixedly provided on the top of the threaded valve stem.

[0009] Furthermore, a flange is fixedly provided on the outer side of the valve body.

[0010] In summary, the present invention has the following beneficial effects:

[0011] When the valve plate body of the utility model descends, the wedge block is inserted into the tightening gap, causing the valve plate body to deform. The left and right sides of the valve plate body are in close contact with the sealing valve ring and squeeze the sealing valve ring, thereby ensuring the sealing of the gate valve during use and eliminating the problem of poor sealing due to wear or deformation of the valve plate caused by long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 This is a main cross-sectional view of a gate valve with good sealing effect according to the utility model. Figure 1 ;

[0014] Figure 2 This is a main cross-sectional view of a gate valve with good sealing effect according to the utility model. Figure 2 ;

[0015] Figure 3 for Figure 1 AA cross-sectional view in.

[0016] In the figure: 1 valve seat, 2 valve body, 3 sealing valve ring, 4 sealing valve body device, 41 valve plate body, 42 expansion joint, 43 wedge block, 44 sealing ring, 5 threaded valve stem, 6 handle, 7 flange. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are 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.

[0018] The following is combined with Figure 1-3 The utility model is further described as follows:

[0019] A gate valve with good sealing effect includes a valve seat 1, and a valve body 2 connected to the valve seat 1 is provided on both sides of the lower part thereof, a flange 7 is fixedly provided on the outer side of the valve body 2, and a sealing valve body device 4 is slidingly provided in the valve body 2, and a sealing valve ring 3 that seals with the sealing valve body device 4 is fixedly provided on the left and right inner walls of the lower part of the valve seat 1, and a threaded valve stem 5 is rotatably provided on the top of the sealing valve body device 4, and the top of the threaded valve stem 5 passes through the top of the valve seat 1 and is rotatably connected thereto, and a handle 6 is fixedly provided on the top of the threaded valve stem 5.

[0020] In this embodiment, the valve body 2 is connected to the delivery pipe via a flange 7. By turning the handle 6, the threaded valve stem 5 drives the sealing valve body device 4 to rise and fall, opening the valve seat 1, or making the sealing valve body device 4 cooperate with the sealing valve ring 3 to seal the valve seat 1.

[0021] The sealing valve body device 4 includes a valve plate body 41, the left and right side surfaces of the valve plate body 41 are in contact with the sealing valve ring 3, the top of the valve plate body 41 is rotatably connected to the threaded valve stem 5, and a tightening gap 42 is opened at the center of the lower part of the valve plate body 41. A wedge block 43 that cooperates with the tightening gap 42 is fixedly provided at the bottom center of the valve seat 1.

[0022] In this embodiment, when the threaded valve stem 5 drives the valve plate body 41 to descend, the wedge block 43 is inserted into the tightening gap 42, causing the valve plate body 41 to deform. The left and right side surfaces of the valve plate body 41 are in close contact with the sealing valve ring 3 and squeeze the sealing valve ring 3 to ensure the sealing of the gate valve during use.

[0023] Sealing rings 44 are fixedly provided on the side walls of the valve plate body 41 on both sides of the expansion gap 42 .

[0024] In this embodiment, the sealing ring 44 is in sealing contact with the inner wall of the valve seat 1, further improving the sealing performance of the gate valve during use.

[0025] In summary, the present invention is not limited to the above-described specific embodiments. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be based on the claims of the present invention.

[0026] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0027] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

Claims

1. A gate valve with good sealing effect, characterized in that: The invention comprises a valve seat (1), wherein both sides of the lower part of the valve seat (1) are provided with a valve body (2) connected thereto, a sealing valve body device (4) is slidably provided in the valve body (2), and a sealing valve ring (3) which is sealed with the sealing valve body device (4) is fixedly provided on the left and right inner walls of the lower part of the valve seat (1), and a threaded valve stem (5) is rotatably provided on the top of the sealing valve body device (4), and the top of the threaded valve stem (5) passes through the top of the valve seat (1) and is rotatably connected thereto.

2. A gate valve with good sealing effect as claimed in claim 1, characterized in that: The sealing valve body device (4) includes a valve plate body (41), the left and right side surfaces of the valve plate body (41) are in contact with the sealing valve ring (3), the top of the valve plate body (41) is rotatably connected to the threaded valve stem (5), a tightening slit (42) is provided at the center of the lower part of the valve plate body (41), and a wedge block (43) that cooperates with the tightening slit (42) is fixedly provided at the bottom center of the valve seat (1).

3. A gate valve with good sealing effect as claimed in claim 2, characterized in that: Sealing rings (44) are fixedly provided on the side walls of the valve plate body (41) on both sides of the expansion gap (42).

4. A gate valve with good sealing effect as claimed in claim 1, characterized in that: A handle (6) is fixedly provided on the top of the threaded valve stem (5).

5. A gate valve with good sealing effect as claimed in claim 1, characterized in that: A flange (7) is fixedly provided on the outer side of the valve body (2).

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