Top-mounted semi-ball valve

Abstract

The utility model discloses a top-mounted semi-ball valve which comprises a valve body, a valve clack is arranged in the valve body, a valve rod which is connected with the valve clack and drives the valve clack to rotate is arranged on the valve body, an actuator which is connected with the valve rod is arranged on the valve body, a sealing valve seat is arranged in the valve body, the sealing valve seat comprises a fixing portion and a sealing portion, and the fixing portion is connected with the sealing portion. The fixing part is detachably fixed to the sealing part, a sealing face matched with the valve clack is formed at one end of the sealing part, a fixing groove is formed in the fixing part in a sunken mode, a fixing hole matched with the fixing groove is formed in the valve body in a sunken mode, and a bolt penetrates through the fixing groove and the fixing hole to fix the sealing valve seat to the valve body. The utility model has the following advantages and effects: the sealing valve seat is detachably arranged on one side of the flow channel and is convenient to disassemble, assemble and replace.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more specifically, to a top-mounted semi-spherical valve. Background Art

[0002] As a typical cut-off valve, the semi-spherical valve is widely used in the cut-off control of media in fields such as petrochemical industry and long-distance pipelines due to its streamlined flow channel design and low flow resistance characteristics. Among them, the top-mounted semi-spherical valve adopts a valve stem top-mounted structure, and the valve core assembly can be integrally hoisted during maintenance, significantly improving the maintenance convenience of key components, and has become an important development direction in the field of industrial valves.

[0003] Traditional top-mounted semi-spherical valves usually adopt an integral valve seat structure design, and the valve seat is fixedly connected to the valve body by interference fit or welding. This integrated design has obvious defects in practical applications: First, when the sealing surface of the valve seat is worn due to long-term erosion by the medium, particle abrasion or corrosion, the valve must be completely disassembled to replace the valve seat, resulting in an extended maintenance period and increased maintenance costs. Especially after long-term use, the wear of the valve seat causes the sealing of the valve to fail, and the existing structure cannot achieve rapid replacement, seriously affecting the operation efficiency of the device. Summary of the Utility Model

[0004] The utility model provides a top-mounted semi-spherical valve, aiming to solve the problem of inconvenient replacement of the semi-spherical valve in the prior art.

[0005] To achieve the above object, the utility model provides the following technical solution: A top-mounted semi-spherical valve, including a valve body, a valve flap is arranged inside the valve, a valve stem for connecting the valve flap and driving the valve flap to rotate is arranged on the valve body, and an actuator for connecting the valve stem is arranged on the valve body. The feature is that a sealed valve seat is arranged inside the valve body, the sealed valve seat includes a fixing part and a sealing part, the fixing part is detachably fixed to the sealing part, one end of the sealing part forms a sealing surface for cooperating with the valve flap, a fixing groove is recessed on the fixing part, a fixing hole for cooperating with it is recessed on the valve body, and a bolt passes through the fixing groove and the fixing hole to fix the sealed valve seat to the valve body.

[0006] The utility model is further arranged as follows: An elastic member is arranged on the fixing part, a connecting groove for cooperating with it is arranged on the sealing part, the elastic member includes an elastic rod fixed on the sealing part, a plugging groove is formed on the fixing part, the elastic rod slides in the plugging groove, a limiting protrusion is arranged on the valve body on one side of the fixing hole, a limiting recess for cooperating with it is formed on the sealing part, and a limiting gap is formed between the limiting recess and the limiting protrusion.

[0007] The present utility model is further configured as follows: Sealing grooves are recessed in both the sealing portion and the fixing portion, a sealing member is disposed in the sealing groove, and the sealing member is disposed in the sealing groove and closely adheres to the valve body.

[0008] The present utility model is further configured as follows: A first spring is disposed in the insertion groove.

[0009] The present utility model is further configured as follows: A valve seat portion is detachably disposed on the sealing portion. One end of the valve seat portion protrudes to form a locking portion. A first insertion hole for inserting the elastic rod is formed in the locking portion. A locking sleeve is fixedly disposed on the elastic rod, and the locking sleeve slides in the insertion groove.

[0010] The present utility model is further configured as follows: The locking sleeve is detachably connected to the elastic rod.

[0011] The present utility model has the following effects: By providing the sealing valve seat and making it detachably connected, during maintenance, components can be better disassembled and replaced, reducing the maintenance cost. At the same time, an elastic member is provided, and in cooperation with the limit of the valve body, the sealing portion has elasticity, enhancing its service life. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is a schematic structural diagram of the elastic member of an embodiment of the present utility model;

[0014] Figure 3 is an enlarged view of part A.

[0015] In the figure: 1, valve body; 12, valve flap; 2, sealing valve seat; 21, fixing portion; 22, sealing portion; 23, sealing surface; 3, fixing hole; 31, elastic rod; 4, insertion groove; 41, limiting protrusion; 5, sealing groove; 51, sealing member; 42, first spring; 24, valve seat portion; 25, locking portion; 26, first insertion hole; 27, locking sleeve. Detailed Embodiments

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] Refer to Figures 1 to 3 To further illustrate the embodiments of the present utility model.

[0019] An upper-mounted hemispherical valve includes a valve body 1. A valve flap 12 is arranged inside the valve. A valve stem is arranged on the valve body 1 to connect the valve flap 12 and drive the valve flap 12 to rotate. An actuator is arranged on the valve body 1 to connect the valve stem. A sealing valve seat 2 is arranged inside the valve body 1. The sealing valve seat 2 includes a fixing part 21 and a sealing part 22. The fixing part 21 is detachably fixed to the sealing part 22. One end of the sealing part 22 forms a sealing surface 23 that cooperates with the valve flap 12. A fixing groove is recessed on the fixing part 21, and a fixing hole 3 that cooperates with it is recessed on the valve body 1. A bolt passes through the fixing groove and the fixing hole 3 to fix the sealing valve seat 2 to the valve body 1, and it is fixed by bolts.

[0020] During assembly, first, the assembly of the sealing part 22 and the fixing part 21 is snapped together to form a complete sealing valve seat 2. Subsequently, the assembled body is placed into the installation cavity of the valve body 1, the positions of the fixing groove and the fixing hole 3 are adjusted to be aligned, and bolts are screwed in to complete the fastening. Finally, the valve flap 12 is installed and the valve stem and the actuator are connected. It should be noted that when the sealing surface 23 is worn, only the bolts need to be disassembled to remove the entire sealing valve seat 2. After separating the fixing part 21 and the sealing part 22, the sealing part 22 can be replaced separately without replacing the entire valve body 1. Practical applications show that this design can significantly reduce the maintenance cost. This embodiment realizes the low-cost replacement of vulnerable parts through a split valve seat structure.

[0021] An elastic member is arranged on the fixing part 21, and a connecting groove that cooperates with it is arranged on the sealing part 22. The elastic member includes an elastic rod 31 fixed to the sealing part 22. A plugging groove 4 is formed on the fixing part 21. The elastic rod 31 slides in the plugging groove 4. A limiting protrusion 41 is arranged inside the valve body 1 on one side of the fixing hole 3. A limiting depression that cooperates with it is formed on the sealing part 22. There is also a limiting gap between the limiting protrusion 41 and the limiting depression, which serves as the moving amount of the sealing part 22.

[0022] During assembly, align the vertical section of the elastic rod 31 of the sealing part 22 with the insertion slot 4 of the fixing part 21 until the vertical section slides into the insertion slot 4. Then, install the sealing valve seat 2. Since the limit protrusion 41 cooperates with the limit depression, when the sealing valve seat 2 is installed in place, the limit protrusion 41 snaps into the limit depression, causing the elastic rod 31 to undergo elastic deformation, thereby achieving elastic locking between the sealing part 22 and the fixing part 21. During use, the elastic rod 31 enhances the sealing performance of the sealing part 22.

[0023] Sealing grooves 5 are recessed in both the sealing part 22 and the fixing part 21. Sealing elements 51 are arranged in the sealing grooves 5. The sealing elements 51 are disposed in the sealing grooves 5 and closely adhere to the valve body 1. The sealing elements 51 include sealing rings and the like, which can effectively enhance the sealing performance of the sealing valve seat 2.

[0024] A first spring 42 is arranged in the insertion slot 4 to enhance elasticity by setting the spring.

[0025] A valve seat part 24 is detachably arranged on the sealing part 22. One end of the valve seat part 24 protrudes to form a locking part 25. A first insertion hole 26 for inserting the elastic rod 31 is formed in the locking part 25. A locking sleeve 27 is also fixedly arranged on the elastic rod 31. The locking sleeve 27 slides in the insertion slot 4. By setting the above structure, the sealing valve seat 2 is divided into three parts. During installation, the locking part 25 is inserted and matched with the elastic rod 31, and then the locking sleeve 27 is fixed to the elastic rod 31. The locking sleeve 27 can be fixedly connected by means of threaded connection or the locking sleeve 27 can be detachably connected to the elastic rod 31 by means of bolts or the like. This structure realizes low-cost replacement of vulnerable parts and ensures the sealing performance by making the valve seat part 24 closely adhere to the valve flap 12 under the action of the first spring 42.

[0026] This specific embodiment is only an explanation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A top-entry hemispherical valve, comprising a valve body, a valve disc disposed in the valve body, a valve stem connected to the valve disc and driving the valve disc to rotate disposed on the valve body, and an actuator connected to the valve stem disposed on the valve body, wherein: A sealing valve seat is arranged in the valve body, and the sealing valve seat comprises a fixing part and a sealing part. The fixing part is detachably fixed to the sealing part, and a sealing surface cooperating with the valve disc is formed at one end of the sealing part. A fixing groove is recessed on the fixing part, and a fixing hole cooperating with the valve disc is recessed on the valve body. Bolts pass through the fixing groove and the fixing hole to fix the sealing valve seat to the valve body.

2. A top entry hemispherical valve according to claim 1, characterized in that: An elastic part is provided on the fixing part, and a connecting groove matching therewith is provided on the sealing part. The elastic part includes an elastic rod fixed on the sealing part, and an inserting groove is formed on the fixing part. The elastic rod slides in the inserting groove. A limiting protrusion located on one side of the fixing hole is provided in the valve body, and a limiting recess matching therewith is formed on the sealing part, and a limiting gap is formed between the limiting recess and the limiting protrusion.

3. A top entry hemispherical valve according to claim 1, characterized in that: The sealing portion and the fixing portion are both recessed with sealing grooves, a sealing member is arranged in the sealing groove, and the sealing member is arranged in the sealing groove and is tightly attached to the valve body.

4. A top entry hemispherical valve according to claim 2, characterized in that: A first spring is arranged in the plug-in slot.

5. A top entry hemispherical valve according to claim 2, characterized in that: The sealing portion is detachably provided with a valve seat portion, one end of which is protruding to form a locking portion, the locking portion is provided with a first plug hole connected to the elastic rod, the elastic rod is also fixedly provided with a locking sleeve, and the locking sleeve slides in the plug-in groove.

6. A top entry hemispherical valve according to claim 5, characterized in that: The locking sleeve is detachably connected to the elastic rod.

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