Bypass gate valve

Abstract

The utility model belongs to the field of gate valves, and particularly discloses a bypass gate valve which comprises a gate valve body, a block valve body and two connecting pipes, the water inlet end of the block valve body communicates with the water inlet end of the gate valve body through one connecting pipe, and the water outlet end of the block valve body communicates with the water outlet end of the gate valve body through the other connecting pipe. One end of the connecting pipe is detachably connected with the gate valve body, and the other end of the connecting pipe is connected with the block valve body in a socket and spigot joint mode. The connecting pipe and the block valve body are connected in the socket and spigot joint mode, flanges and bolts do not need to be adopted for connection, the material cost is saved, installation stress caused by welding deformation when the connecting pipe and the gate valve body are welded is eliminated, meanwhile, the other end of the connecting pipe is detachably connected with the gate valve body, and therefore the connecting pipe and the block valve body are not prone to deformation. And the block valve body can be assembled and disassembled, so that the block valve body is convenient to overhaul and maintain.

Description

Technical Field

[0001] This application belongs to the field of gate valves, and more specifically, relates to a bypass gate valve. Background Art

[0002] A gate valve is a valve with a gate plate as the opening and closing member. The movement of the gate plate is controlled to open and close the valve. The movement direction of the gate plate is perpendicular to the fluid direction, and it is relatively labor-saving to open and close and has a wide range of applications.

[0003] Traditional large-diameter gate valves include a valve body, a valve stem, and a gate plate. A flow channel is provided inside the valve body, and the valve stem drives the gate plate to rise and fall to cut off and allow the flow of the flow channel. The traditional valve body only has a single flow channel. After the large-diameter gate valve is closed, the gate plate is pressured on one side, making it difficult to open the large-diameter gate valve. Therefore, a bypass channel is provided outside the valve body and a cutoff valve is provided on the bypass channel. Currently, when installing the cutoff valve, elbows are usually flange-connected on both sides of the cutoff valve, and then the two elbows are welded to the gate valve, so that the elbows are communicated with the valve cavity of the gate valve. This installation method requires a welding process, the installation is relatively complex, resulting in a low installation efficiency, and welding deformation is likely to occur during the welding process, causing the cutoff valve to be subjected to installation stress and reducing the service life of the cutoff valve. Utility Model Content

[0004] Aiming at the defects of the prior art, this application provides a bypass gate valve, aiming to solve the problems that the existing cutoff valve has a low installation efficiency and the service life of the cutoff valve is reduced due to installation stress.

[0005] A bypass gate valve provided by this application specifically includes a gate valve body, a cutoff valve body, and two connecting pipes. The water inlet end of the cutoff valve body is communicated with the water inlet end of the gate valve body through one connecting pipe, and the water outlet end of the cutoff valve body is communicated with the water outlet end of the gate valve body through the other connecting pipe. One end of the connecting pipe is detachably connected to the gate valve body, and the other end is socket-connected to the cutoff valve body.

[0006] Through the above technical solution conceived by this application, compared with the prior art, since the connecting pipe and the cutoff valve body in this application are socket-connected, during installation, the connecting pipe can be directly inserted into the cutoff valve body, which is convenient for installation, without the need to use flanges and bolts for connection, saving material costs, and eliminating the installation stress caused by welding deformation during the welding between the connecting pipe and the gate valve body. At the same time, the other end of the connecting pipe in this application is detachably connected to the gate valve body, which can achieve the beneficial effect that the cutoff valve body can be installed and disassembled, facilitating its maintenance and repair.

[0007] As a further preference, an angle fixing member is provided on the connecting pipe, and positioning card slots adapted to be inserted with the angle fixing member are respectively provided at the water inlet opening and the water outlet opening of the main body of the cut-off valve. The angle fixing member is inserted into the positioning card slot to limit the rotation of the connecting pipe.

[0008] By adopting the above technical solution, after the connecting pipe is connected to the main body of the cut-off valve, the angle fixing member on the connecting pipe is inserted into the positioning card slot, which can prevent the relative rotation between the connecting pipe and the main body of the cut-off valve and improve the connection stability.

[0009] As a further preference, an installation adjustment gap is left between one end of the connecting pipe and the socket inner port of the main body of the cut-off valve.

[0010] By adopting the above technical solution, after the connecting pipe is connected to the main body of the cut-off valve, an installation adjustment gap is left at the connection, which can further eliminate the stress caused by machining errors and welding deformation.

[0011] As a further preference, the main body of the cut-off valve is any one of a gate valve, a ball valve, and a butterfly valve.

[0012] By adopting the above technical solution, the main body of the cut-off valve can be selected from a gate valve, a ball valve, and a butterfly valve according to the actual working conditions, improving the applicability of the gate valve in this application.

[0013] As a further preference, an annular seal is provided between the connecting pipe and the main body of the cut-off valve.

[0014] By adopting the above technical solution, the annular seal can improve the sealing performance between the connecting pipe and the main body of the cut-off valve and prevent water from leaking out through the gap between the connecting pipe and the main body of the cut-off valve.

[0015] As a further preference, an installation groove for fixedly installing the annular seal is provided on the main body of the cut-off valve.

[0016] By adopting the above technical solution, the annular seal is more stably installed in the installation groove, further ensuring the sealing performance between the connecting pipe and the main body of the cut-off valve.

[0017] As a further preference, the annular seal includes an installation portion and a sealing portion. The installation portion is attached to the inner wall of the installation groove, the sealing portion is disposed around the inner peripheral wall of the installation portion and is attached to the outer wall of the connecting pipe, and the thickness of the installation portion is greater than the thickness of the sealing portion.

[0018] By adopting the above technical solution, when the connecting pipe is inserted into the main body of the cut-off valve, it passes through the annular seal. The sealing portion can be deformed to allow the connecting pipe to pass through, and at the same time, the sealing effect is achieved by the sealing portion being attached to the outer wall of the connecting pipe. The thickness of the installation portion is greater than that of the sealing portion, enabling the annular seal to be stably installed in the installation groove as a whole.

[0019] As a further preference, the connecting pipe is a right-angle elbow pipe.

[0020] By adopting the above technical solution, after the stop valve body is connected to the gate valve body through the connecting pipe, the integrity is better, and the installation space can be saved.

[0021] As a further preference, the connecting pipe is fixedly connected to the gate valve body through a flange.

[0022] By adopting the above technical solution, the connecting pipe and the gate valve body are fixedly connected through a flange, so that the stop valve body and the connecting pipe can be disassembled and assembled, facilitating the overhaul and maintenance of the stop valve body.

[0023] Generally speaking, compared with the prior art by the above technical solutions conceived in the present application, the following technical advantages are mainly possessed:

[0024] 1. In the present application, by adopting a socket connection between the connecting pipe and the stop valve body, when installing, the two connecting pipes are respectively inserted into both sides of the stop valve body. The installation is convenient, there is no need to use flanges and bolts for connection, saving material costs. And when the other end of the connecting pipe is connected to the gate valve body, the socket connection can eliminate the installation stress caused by welding deformation during the welding of the connecting pipe and the gate valve body. At the same time, the other end of the connecting pipe in the present application is detachably connected to the gate valve body, enabling the stop valve body to be disassembled and assembled, facilitating its overhaul and maintenance.

[0025] 2. After the connecting pipe and the stop valve body are inserted in the present application, the angle fixing piece on the connecting pipe is inserted into the positioning slot, which can prevent the relative rotation between the connecting pipe and the stop valve body, improving the connection stability between the connecting pipe and the stop valve body.

[0026] 3. After the connecting pipe and the stop valve body are connected in the present application, an installation adjustment gap is left at the connection, which can further eliminate the stress caused by processing errors and welding deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the bypass gate valve provided by the embodiment of the present application;

[0028] Figure 2 is a schematic cross-sectional structure diagram of the stop valve body provided by the embodiment of the present application;

[0029] Figure 3 is Figure 2 the enlarged structure diagram of part A in

[0030] In all the drawings, the same reference numerals are used to represent the same elements or structures, where:

[0031] 1. Gate valve body; 2. Shut-off valve body; 21. Positioning card slot; 22. Installation groove; 3. Connecting pipe; 4. Angle fixing piece; 5. Annular seal; 51. Installation part; 52. Sealing part; 6. Flange. Detailed implementation manner

[0032] In order to make the purpose, technical solution and advantages of the present application clearer, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] Refer to Figures 1-3 As shown in the figure, a bypass gate valve disclosed in the present application includes a gate valve body 1, a shut-off valve body 2 and two connecting pipes 3. A valve stem and a gate plate are provided on the gate valve body 1. A flow channel is provided inside the gate valve body 1. The valve stem drives the gate plate to lift to form the cut-off and circulation of the flow channel. The flow channel extends to both ends of the gate valve body 1 to form a water inlet end and a water outlet end. Similarly, a flow channel is also provided inside the shut-off valve body 2. The flow channel extends to both ends of the shut-off valve body 2 to form a water inlet end and a water outlet end. The water inlet end of the shut-off valve body 2 is communicated with the water inlet end of the gate valve body 1 through a connecting pipe 3, and the water outlet end of the shut-off valve body 2 is communicated with the water outlet end of the gate valve body 1 through another connecting pipe 3; the shut-off valve body 2 is any one of a gate valve, a ball valve, and a butterfly valve. In actual working conditions, it can be selected according to needs.

[0034] In this embodiment, the connecting pipe 3 is a right-angle elbow. One end of the connecting pipe 3 is connected to the shut-off valve body 2 in a socket connection. During installation, the two connecting pipes 3 are respectively inserted into the water inlet end opening and the water outlet end opening of the shut-off valve body 2, and there is no need to use flanges and bolts for connection, which can eliminate the installation stress caused by welding deformation when welding the other end of the connecting pipe 3 to the gate valve body 1.

[0035] Specifically, angle fixing pieces 4 are fixedly provided on the outer walls of the two connecting pipes 3. At the same time, positioning card slots 21 adapted to the insertion of the angle fixing pieces 4 are opened at the water inlet end opening and the water outlet end opening of the shut-off valve body 2. After the connecting pipe 3 is inserted into the shut-off valve, the angle fixing piece 4 on the connecting pipe 3 is inserted into the positioning card slot 21 to limit the rotation of the connecting pipe 3 and improve the connection stability between the connecting pipe 3 and the shut-off valve body 2. After the connecting pipe 3 is connected to the shut-off valve body 2, an installation adjustment gap is left between the end of the connecting pipe 3 and the socket inner port of the shut-off valve body 2, and a chamfer is provided on the outer peripheral side of the end of the connecting pipe 3 located inside the shut-off valve body 2. By leaving an installation adjustment gap at the connection, the stress caused by machining errors and welding deformation can be further eliminated.

[0036] To improve the connection tightness between the connecting pipe 3 and the cut-off valve body 2, an annular seal 5 is provided between the two connecting pipes 3 and the cut-off valve body 2. The annular seal 5 is located in the gap between the connecting pipe 3 and the cut-off valve body 2 to improve the connection tightness. An installation groove 22 for fixedly installing the annular seal 5 is formed on the cut-off valve body 2 to improve the installation stability of the annular seal 5 and prevent the position of the annular seal 5 from moving after the connecting pipe 3 is inserted, which may affect the sealing effect.

[0037] Furthermore, the annular seal 5 includes an integrally formed installation portion 51 and a sealing portion 52. The installation portion 51 is in contact with the inner wall of the installation groove 22, enabling the overall stable installation of the annular seal 5. The sealing portion 52 is disposed around the inner peripheral wall of the installation portion 51. When the connecting pipe 3 is connected to the cut-off valve body 2, the sealing portion 52 is in contact with the outer wall of the connecting pipe 3. The thickness of the installation portion 51 is greater than that of the sealing portion 52. When the connecting pipe 3 is inserted into the cut-off valve body 2, it passes through the annular seal 5. The sealing portion 52 can deform to allow the connecting pipe 3 to pass through, and at the same time, the sealing effect is achieved by the contact between the sealing portion 52 and the outer wall of the connecting pipe 3. The greater thickness of the installation portion 51 than that of the sealing portion 52 enables the overall stable installation of the annular seal 5 in the installation groove 22.

[0038] In this embodiment, the other ends of the two connecting pipes 3 are detachably connected to the gate valve body 1. Specifically, the connecting pipe 3 is fixedly connected to the gate valve body 1 through a flange 6 and fixing bolts. Compared with the existing welding method, this installation method enables the cut-off valve body 2 and the connecting pipe 3 to be assembled and disassembled, facilitating the maintenance and repair of the cut-off valve body 2.

[0039] It should be understood that expressions such as "including" and "may include" used in this application indicate the existence of the disclosed functions, operations, or components, and do not limit the existence of one or more additional functions, operations, and components. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, component, assembly, or a combination thereof, but cannot be interpreted as excluding the existence or possibility of addition of one or more other characteristics, numbers, operations, components, assemblies, or combinations thereof.

[0040] It should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0042] In the present application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] It is easy for those skilled in the art to understand that the above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A bypass gate valve, characterized in that, It includes a gate valve body (1), a shut-off valve body (2) and two connecting pipes (3). The water inlet end of the shut-off valve body (2) is communicated with the water inlet end of the gate valve body (1) through a connecting pipe (3), and the water outlet end of the shut-off valve body (2) is communicated with the water outlet end of the gate valve body (1) through another connecting pipe (3). One end of the connecting pipe (3) is detachably connected to the gate valve body (1), and the other end is socket-connected to the shut-off valve body (2).

2. The bypass gate valve according to claim 1, characterized in that, An angle fixing member (4) is provided on the connecting pipe (3). Positioning card slots (21) adapted to be inserted with the angle fixing member (4) are provided at the openings of the water inlet end and the water outlet end of the shut-off valve body (2). The angle fixing member (4) is inserted into the positioning card slot (21) to limit the rotation of the connecting pipe (3).

3. A bypass gate valve as claimed in claim 1, wherein, An installation adjustment gap is left between one end of the connecting pipe (3) and the socket inner port of the shut-off valve body (2).

4. A bypass gate valve as claimed in claim 1, wherein, The shut-off valve body (2) is any one of a gate valve, a ball valve and a butterfly valve.

5. A bypass gate valve according to any one of claims 1-4, characterized in that, A ring-shaped seal (5) is provided between the connecting pipe (3) and the shut-off valve body (2).

6. The bypass gate valve according to claim 5, wherein An installation groove (22) for fixedly installing the ring-shaped seal (5) is provided on the shut-off valve body (2).

7. The bypass gate valve according to claim 6, wherein, The ring-shaped seal (5) includes an installation portion (51) and a sealing portion (52). The installation portion (51) fits against the inner wall of the installation groove (22), and the sealing portion (52) is disposed around the inner peripheral wall of the installation portion (51) and fits against the outer wall of the connecting pipe (3). The thickness of the installation portion (51) is greater than the thickness of the sealing portion (52).

8. A bypass gate valve according to any one of claims 1-4, characterized in that, The connecting pipe (3) is a right-angle elbow pipe.

9. A bypass gate valve according to any one of claims 1-4, characterized in that, The connecting pipe (3) is fixedly connected to the gate valve body (1) through a flange (6).

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