Welded sealing disc valve

Abstract

The utility model relates to the field of disc valves, in particular to a welding sealing disc valve. Comprising valve bodies which are detachably connected and arranged in pairs, and the pair of valve bodies are connected with the two ends of a cylinder respectively and are provided with flow channels penetrating through the pair of valve bodies; the adjacent ends of the pair of valve bodies are provided with valve seats corresponding to the flow channels. Wherein one valve body is provided with a valve rod assembly in a penetrating mode, the valve rod assembly comprises a control part and an execution part, and the execution part is arranged in a cavity formed by the pair of valve bodies and the cylinder, located between the pair of valve seats and used for controlling the opening degree of the flow channel. A sealing ring is arranged on the side, close to the valve body, of the valve seat, a valve seat pressing sleeve is arranged on the other side of the valve seat, a welding seam is formed in the outer edge face, adjacent to the flow channel, of the valve seat pressing sleeve, and the valve seat pressing sleeve is fixed to the valve body through welding. According to the disc valve, the valve seat pressing sleeve is arranged, and after the valve seat pressing sleeve and the valve seat are pressed tightly through an external tool, the valve seat pressing sleeve and the valve body are welded and fixed, so that the valve seat is firmly fixed, and the sealing performance of the disc valve is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of disc valves, in particular to a welding sealing disc valve. Background Art

[0002] The disc valve is a fast-opening and fast-closing valve that switches on and off by sliding a disc. It is designed specifically for materials with abrasive and erosive characteristics, and can work normally for a long time under harsh working conditions.

[0003] However, the disc valve in the prior art may have a problem that the valve seat and the connecting end of the valve body are not tightly matched under the impact of fluid for a long time, resulting in sealing failure. Utility Model Content

[0004] The utility model aims to provide a welding sealing disc valve to solve the problem that the valve seat seal of the disc valve in the prior art is easy to fail.

[0005] The technical scheme of the utility model is: a welded sealing disc valve, comprising valve bodies arranged in pairs that can be detachably connected, wherein the pair of valve bodies are respectively connected to the two ends of a cylinder and have a flow channel that penetrates the pair of valve bodies; valve seats are arranged at the corresponding flow channels at the adjacent ends of the pair of valve bodies; a valve stem assembly is penetrated through one of the valve bodies, the valve stem assembly comprises a control part and an actuator, the actuator is arranged in a chamber formed by the pair of valve bodies and the cylinder, and is located between the pair of valve seats, and is used to control the opening of the flow channel;

[0006] Among them, a sealing ring is arranged on one side of the valve seat close to the valve body, and a valve seat pressing sleeve is arranged on the other side. A weld is opened on the outer edge surface of the valve seat pressing sleeve adjacent to the flow channel, and the valve seat pressing sleeve is fixed to the valve body by welding.

[0007] Preferably, the cross section of the valve seat through the axis is set to an L-shaped structure, and forms a chamber for accommodating the valve seat compression sleeve, and the inner wall and outer wall of the valve seat compression sleeve are respectively in contact with the valve seat and the valve body.

[0008] Preferably, the valve stem assembly is configured as a zigzag structure, and the control part is fixed to the actuator via a connecting rod passing through the valve body; by driving the control part to rotate around the axis of the connecting rod, the degree of overlap between the projection of the actuator on a plane perpendicular to the axis of the flow channel and the projection of the flow channel on this plane is changed.

[0009] Preferably, a first chamfer is provided on a side of the outer edge of the valve seat sleeve close to the actuator, and a second chamfer is provided on the valve body corresponding to the first chamfer, and the first chamfer and the second chamfer cooperate to form a weld.

[0010] Preferably, the control unit includes a rocker arm, which is connected to a connecting rod by bolts, and the actuator is connected to a valve disc, which is arranged in pairs and has an end close to the corresponding flow channel that has a diameter not less than the flow channel, and the valve disc abuts against the valve seat to form a sealing surface; the control unit drives the connecting rod to drive the valve disc to rotate, thereby controlling the opening of the flow channel.

[0011] Preferably, the actuator is protruded in the horizontal direction as a circular shaft, and the valve disc is provided with a mounting hole corresponding to the circular shaft structure of the actuator, and is rotatably connected to the actuator through the mounting hole.

[0012] Preferably, one end of the valve disc close to the actuator is connected to the actuator via an elastic member, so that the valve disc can move in a vertical direction relative to the sealing surface under the action of the elastic member.

[0013] Compared with the prior art, the advantages of the utility model are: the application is provided with a valve seat pressing sleeve, and after the valve seat pressing sleeve is pressed against the valve seat by external tooling, the valve seat pressing sleeve is welded and fixed to the valve body, thereby firmly fixing the valve seat and enhancing the sealing of the disc valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 This is a structural diagram of a welded sealing disc valve described in the utility model;

[0016] Figure 2 This is a cross-sectional view of a welded sealing disc valve described in the utility model;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a structural diagram of the valve stem assembly of the utility model;

[0019] Figure 5 for Figure 2 Enlarged view of point B in the middle;

[0020] Among them: 11. first valve body, 12. second valve body, 13. cylinder, 2. weld, 3. seal, 4. valve seat sleeve, 5. flow channel, 6. valve seat, 7. valve disc, 8. valve stem assembly, 81. control part, 82. connecting rod, 821. first part, 822. second part, 83. actuator, 9. elastic part, 91. spring, 92. push head. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0022] like Figure 1 and Figure 2 As shown, a welded sealing disc valve comprises a first valve body 11, a second valve body 12 and a hollow cylinder 13, wherein the first valve body 11 and the second valve body 12 are respectively connected to the two ends of the cylinder 13 by long bolts. A flow channel 5 for fluid circulation with the axis coinciding is provided through the first valve body 11 and the second valve body 12, and two valve seats 6 are provided at the adjacent ends of the first valve body 11 and the second valve body 12 corresponding to the flow channel 5, and the two valve seats 6 are embedded with the corresponding first valve body 11 or second valve body 12, and a valve disc 7 for controlling the opening of the flow channel 5 is provided in a chamber formed by the first valve body 11, the second valve body 12 and the cylinder 13 and between a pair of valve seats 6, and the end of the valve disc 7 close to the flow channel 5 has a diameter not less than that of the flow channel 5.

[0023] The first valve body 11 is provided with a valve stem assembly 8. Figure 4 As shown, the valve stem assembly 8 is configured as a zigzag structure, including a control part 81, and the control part 81 is connected to the actuator 83 through a connecting rod 82. In this embodiment, the connecting rod 82 includes a first part 821 and a second part 822 connected vertically to the first part 821. The control part 81 has a rocker, and the rocker is fixed to one end of the first part 821 by bolts, and the other end of the first part 821 is rotatably connected to the second valve body 12 through a press table. The end of the second part 822 away from the first part 821 is connected to the actuator 83, and the actuator 83 is configured as a T-shaped structure, having a circular axis extending in the horizontal direction and on both sides, and the valve disc 7 is provided with a mounting hole corresponding to the circular axis structure of the actuator 83, and a pair of valve discs 7 are rotatably connected to the circular axis on both sides through the mounting holes. The end of the valve disc 7 away from the actuator 83 is tightly fitted with the valve seat 6, and the fitting surface is used as a sealing surface. By moving the rocker to rotate around the axis of the first part 821, the valve disc 7 can be controlled to move relative to the flow channel 5, and the overlap between the projection of the valve disc 7 on the sealing surface and the projection of the flow channel 5 on the sealing surface can be changed, thereby controlling the opening of the flow channel 5. Because the valve disc 7 and the actuator 83 are connected by rotation, when the rocker controls the valve disc 7 to swing, the valve disc 7 can rotate around its own axis to achieve a self-grinding function.

[0024] Combination Figure 2 and 3 As shown, a seal 3 is provided between the first valve body 11, the second valve body 12 and the valve seat 6, including a sealing groove and a matching sealing ring. The cross section of the valve seat 6 along the axis is provided as an L-shaped structure, and a valve seat pressing sleeve 4 is accommodated on the side away from the sealing groove, and the inner wall and outer wall of the valve seat pressing sleeve 4 are respectively in contact with the valve seat 6 and the valve body.

[0025] Furthermore, in this embodiment, combined with Figure 2 and Figure 5As shown, the actuator 83 is provided with an elastic member corresponding to the valve disc 7, and the elastic member 9 includes a spring 91 and a push head 92. The push head 92 is provided with a T-shaped structure, and the two ends of the spring 91 are respectively in contact with the actuator 83 and the push head 92. After the end of the valve disc 7 abutting against the valve seat 6 is worn, the spring 91 drives the push head 92 to drive the valve disc 7 to move toward the valve seat 6, thereby maintaining the sealing of the sealing surface.

[0026] In order to further improve the sealing performance of the valve seat 6, a pair of valve seat pressing sleeves 4 are provided with a first chamfer on one side close to the actuator 83, and the first valve body 11 and the second valve body 12 are provided with a second chamfer corresponding to the first chamfer. The first chamfer cooperates with the second chamfer to form a region with a triangular cross section, which serves as a weld 2. After the valve seat pressing sleeve 4 is axially pressed against the corresponding first valve body 11 or second valve body 12 by an external tool, solder is filled in the weld 2 to fix the valve seat pressing sleeve 4.

[0027] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A welded sealing disc valve, characterized in that: It comprises a pair of valve bodies which are detachably connected, wherein the pair of valve bodies are respectively connected to the two ends of a cylinder (13) and have a flow channel (5) penetrating the pair of valve bodies; valve seats (6) are arranged at the adjacent ends of the pair of valve bodies corresponding to the flow channel (5); a valve stem assembly (8) is arranged penetrating one of the valve bodies, the valve stem assembly (8) comprises a control part (81) and an actuator (83), the actuator (83) is arranged in a chamber formed by the pair of valve bodies and the cylinder (13), and is located between the pair of valve seats (6), and is used to control the opening of the flow channel (5); A sealing ring is arranged on one side of the valve seat (6) close to the valve body, and a valve seat pressing sleeve (4) is arranged on the other side. A welding seam (2) is provided on the outer edge surface of the valve seat pressing sleeve (4) adjacent to the flow channel (5), and the valve seat pressing sleeve (4) is fixed to the valve body by welding.

2. A welded sealing disc valve according to claim 1, characterized in that: The cross section of the valve seat (6) passing through the axis is arranged as an L-shaped structure and contains a valve seat pressing sleeve (4), wherein the inner wall and the outer wall of the valve seat pressing sleeve (4) are respectively in contact with the valve seat (6) and the valve body.

3. A welded sealing disc valve according to claim 1, characterized in that: The valve stem assembly (8) is configured as a zigzag structure, and the control part (81) is fixed to the actuator (83) via a connecting rod (82) that penetrates the valve body; by driving the control part (81) to rotate around the axis of the connecting rod (82), the overlap between the projection of the actuator (83) on a plane perpendicular to the axis of the flow channel (5) and the projection of the flow channel (5) on the plane is changed.

4. A welded sealing disc valve according to claim 2, characterized in that: The outer edge surface of the valve seat pressing sleeve (4) is provided with a first chamfer on one side close to the actuator (83), and the valve body is provided with a second chamfer corresponding to the first chamfer. The first chamfer and the second chamfer cooperate to form a weld (2).

5. A welded sealing disc valve according to claim 1, characterized in that: The control unit (81) comprises a rocker arm, which is connected to a connecting rod (82) via a bolt. The actuator (83) is connected to a valve disc (7). The valve discs (7) are arranged in pairs, and one end close to the corresponding flow channel (5) has a diameter not less than that of the flow channel (5). The valve disc (7) abuts against the valve seat (6) to form a sealing surface. The control unit (81) drives the connecting rod (82) to drive the valve disc (7) to rotate, thereby controlling the opening of the flow channel (5).

6. A welded sealing disc valve according to claim 5, characterized in that: The actuator (83) is protruding in the horizontal direction and is arranged as a circular shaft. The valve disc (7) is provided with a mounting hole corresponding to the circular shaft structure of the actuator (83) and is rotatably connected to the actuator (83) through the mounting hole.

7. A welded sealing disc valve according to claim 6, characterized in that: One end of the valve disc (7) close to the actuator (83) is connected to the actuator (83) via an elastic member (9), so that the valve disc (7) can move in a vertical direction relative to the sealing surface under the action of the elastic member.

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