Valve seat assembly and low-temperature split type fixed ball valve adopting same

Abstract

The utility model relates to the technical field of valve seats, in particular to a valve seat assembly and a low-temperature split type fixed ball valve with the valve seat assembly, the valve seat assembly comprises a valve seat body and a valve seat support, one end of the valve seat body is connected with the valve seat support, and the other end of the valve seat body abuts against a ball body. The valve seat body is used for relieving the acting force transmitted to the valve seat support by the ball body, the valve seat support is used for connecting the valve seat body and the valve body, the valve seat support is provided with a first groove facing the valve body, and the valve seat support and the valve body are kept spaced through the first groove. The valve seat assembly is connected and matched with the spring piece, the acting force on the valve body when the valve seat assembly impacts towards the valve body is reduced, and the service life of the valve seat assembly and the service life of the valve body are prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seats, in particular to a valve seat component and a low-temperature split fixed ball valve using the component. Background Art

[0002] The trunnion-mounted ball valve is a new generation of high-performance ball valve, suitable for long-distance pipelines and general industrial pipelines. Its strength, safety, and resistance to harsh environments are specially considered during design, and it is suitable for various corrosive and non-corrosive media.

[0003] Among them, the cryogenic split-type trunnion-mounted ball valve is a valve specially designed for ultra-low temperature media (such as liquefied natural gas LNG, liquid nitrogen, liquid oxygen, etc.). It combines the technical features of the split valve body structure and the trunnion-mounted ball valve, and is suitable for harsh working conditions from -46°C to -196°C.

[0004] At present, when the low-temperature split ball valve releases pressure, the ball body and the valve body use spring parts and valve seats to reduce the transmission of the force of the ball body toward the valve body.

[0005] During the process of releasing the pressure from the ball body, the valve seat and the valve body collide more frequently, which reduces the service life of the valve seat and the valve body.

[0006] Therefore, how to reduce the number of collisions between the valve seat and the valve body and thus extend the service life of the valve seat and the valve body is a technical problem that needs to be urgently solved in the prior art. Utility Model Content

[0007] The utility model aims to solve the problem of how to reduce the number of collisions between a valve seat and a valve body in the prior art, and to provide a valve seat assembly and a low-temperature split fixed ball valve using the assembly.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A valve seat assembly includes a valve seat body and a valve seat support, wherein one end of the valve seat body is connected to the valve seat support, and the other end of the valve seat body abuts against a ball body, the valve seat body is used to reduce the force transmitted from the ball body to the valve seat support, and the valve seat support is used to connect the valve seat body and the valve body, and the valve seat support is provided with a first groove toward the valve body, and the first groove keeps the valve seat support and the valve body spaced apart.

[0010] Preferably, the valve seat support is provided with a second groove facing the valve body, and the spring member is arranged in the second groove and connected to the valve seat support.

[0011] Preferably, a pressure reducing component is provided in the first groove. The pressure reducing component includes a sliding member and a winding member. One side of the winding member is connected to the sliding member, and the other side of the winding member keeps a gap from the valve body. One side of the sliding member is connected to the valve seat support. The winding member is used to reduce the acting force of the valve seat support towards the valve body, and the sliding member drives the winding member to move synchronously with the valve seat support.

[0012] Preferably, there is a gap at the connection between the winding member and the sliding member, and the gap is used to reduce the acting force between the winding member and the sliding member.

[0013] Preferably, a fixing bracket is provided on the valve seat body towards the sphere body. One end of the fixing bracket is connected to the sphere body, and the other end of the fixing bracket is connected to the valve seat assembly. The fixing bracket is used to keep a gap between the valve seat support and the sphere body.

[0014] Preferably, the valve seat support is provided with a fixing pin, and the fixing pin is used to keep the valve seat support stable.

[0015] A cryogenic split fixed ball valve using a valve seat assembly includes the above-mentioned valve seat assembly, and further includes a sphere body and a valve body. The sphere body is used to control the valve to allow high-pressure media to flow through, and the valve body is used to maintain the stable state of the ball valve. A valve seat assembly and a spring member are provided between the sphere body and the valve body. The valve seat assembly is used to connect the sphere body and the valve body. One side of the valve seat assembly abuts against the surface of the sphere body, and a gap is kept between the other side of the valve seat assembly and the valve body. The spring member is arranged at the gap between the valve seat assembly and the valve body. One side of the spring member is connected to the valve seat assembly, and a gap is kept between the other side of the spring member and the valve body. The spring member is used to reduce the acting force of the valve seat assembly hitting the valve body.

[0016] Preferably, the valve body includes a left body and a valve body base. The left body and the sphere body cooperate to form a conveying channel. The valve body base is used to keep the sphere body stable. The left body is connected to the valve seat assembly. One side of the valve body base is connected to the left body, and the other side of the valve body base is connected to the sphere body. The central axis of the left body is parallel to the central axis of the sphere body, and the central axis of the valve body base coincides with the central axis of the sphere body. Taking the ground as the projection plane, the edge of the projection of the valve body coincides with the edge of the sphere body.

[0017] Preferably, the left body and the valve body base are provided with hex nuts, and the hex nuts are used to connect the left body and the valve body base.

[0018] Preferably, the valve body is provided with a footrest facing the ground, and the footrest is used to maintain the stable state of the valve body.

[0019] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] 1. For a valve seat assembly of the present utility model, the provided valve seat assembly is connected and cooperated with the spring member, the acting force of the valve seat assembly towards the valve body during impact is reduced, and the service lives of the valve seat assembly and the valve body are improved.

[0021] 2. For a valve seat assembly of the present utility model, the provided valve seat body is connected and cooperated with the valve seat support, the sliding member and the winding member can further slow down the acting force of the valve seat assembly towards the valve body, the first groove and the second groove cooperate with the decompression assembly to further improve the service life of the valve seat assembly, and the fixed bracket and the fixed pin can effectively maintain the stability among the valve seat assembly, the valve body and the sphere body.

[0022] 3. For a cryogenic split fixed ball valve adopting a valve seat assembly of the present utility model, the provided hexagonal nut and the footrest further improve the stability between the sphere body and the valve body, the valve seat assembly is connected and cooperated with the spring and between the sphere body and the valve body, further improving the service lives of the valve body and the valve seat assembly, and thus improving the practicability of the present utility model during actual use. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a cryogenic split fixed ball valve adopting a valve seat assembly;

[0024] Figure 2 is a schematic cross-sectional structure diagram of a valve seat assembly;

[0025] Figure 3 is Figure 1 the schematic cross-sectional structure diagram of B in

[0026] Figure 4 is Figure 2 the schematic cross-sectional structure diagram of C in

[0027] Markings in the figure: 1 - sphere body, 2 - valve body, 3 - valve seat assembly, 4 - spring member, 5 - valve seat body, 6 - valve seat support. 7 - first groove, 8 - second groove, 9 - decompression assembly, 10 - sliding member, 11 - winding member, 12 - fixed bracket, 13 - fixed pin, 14 - left body, 15 - valve body base, 16 - hexagonal nut, 17 - footrest. Detailed Embodiments

[0028] The present utility model will be described in detail below with reference to the accompanying drawings.

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model.

[0030] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the claimed present utility model, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are 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 should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0034] In Embodiment 1: As Figures 1 to 3 shown, a valve seat assembly described in the present utility model includes a valve seat body 5 and a valve seat support 6. One end of the valve seat body 5 is connected to the valve seat support 6, and the other end of the valve seat body 5 abuts against a sphere body 1. The valve seat body 5 is used to slow down the acting force transmitted from the sphere body 1 to the valve seat support 6. The valve seat support 6 is used to connect the valve seat body 5 and a valve body 2. The valve seat support 6 is provided with a first groove 7 facing the valve body 2, and the first groove 7 keeps the valve seat support 6 spaced from the valve body 2.

[0035] In this embodiment, the valve seat body 5 further reduces the acting force of the sphere body 1 towards the valve body 2. At the same time, the contact between the valve seat body 5 and the sphere body 1 can effectively maintain the stability of the valve seat assembly 3 and the sphere body 1. The first groove 7 can effectively provide a displacement amount between the valve seat support 6 and the valve body 2. When the valve seat support 6 moves towards the valve body 2, it moves through the first groove 7, further reducing the acting force of the valve seat assembly 3 towards the valve body 2, and thus improving the service life of the valve body 2 and the valve seat support 6.

[0036] As a preferred implementation, on the basis of the above method, further, the valve seat support 6 is provided with a second groove 8 facing the valve body 2, and the spring member 4 is arranged in the second groove 8 and connected to the valve seat support 6. With this structural arrangement, the cooperation between the second groove 8 and the first groove 7 can further reduce the acting force of the valve seat support 6 towards the valve body 2, and further improve the service life of the valve seat support 6 and the valve body 2.

[0037] As a preferred implementation, on the basis of the above method, further, the first groove 7 is provided with a pressure reducing component 9. The pressure reducing component 9 includes a sliding member 10 and a winding member 11. One side of the winding member 11 is connected to the sliding member 10, and the other side of the winding member 11 maintains a gap with the valve body 2. One side of the sliding member 10 is connected to the valve seat support 6. The winding member 11 is used to reduce the acting force of the valve seat support 6 towards the valve body 2, and the sliding member 10 drives the winding member 11 to move synchronously with the valve seat support 6. With this structural arrangement, when the valve seat support 6 impacts the valve body 2, the sliding member 10 can effectively reduce the kinetic energy when the valve seat support 6 moves by moving synchronously through the valve seat support 6. The winding member 11 effectively reduces the acting force when the valve seat support 6 impacts the valve body 2. At the same time, the winding member 11 can effectively reduce the deformation amount when the valve seat support 6 impacts the valve body 2, and further improve the service life of the valve seat support 6 and the valve body 2.

[0038] Specifically, the sliding member 10 can be made of materials resistant to low temperature such as metal, and the winding member 11 can be made of materials with resilience.

[0039] In Embodiment 2: As Figures 1 to 4As shown in the figure, a valve seat assembly described in the present utility model has a gap at the connection between the winding member 11 and the sliding member 10, and this gap is used to reduce the acting force between the winding member 11 and the sliding member 10. With this structural arrangement, the gap between the winding member 11 and the sliding member 10 can effectively reduce the acting force of the sliding member 10 towards the winding member 11, and further improve the service life of the winding member 11 and the sliding member 10.

[0040] As a preferred embodiment, on the basis of the above method, further, a fixed bracket 12 is provided on the valve seat body 5 facing the sphere body 1. One end of the fixed bracket 12 is connected to the sphere body 1, and the other end of the fixed bracket 12 is connected to the valve seat assembly 3. The fixed bracket 12 is used to keep a gap between the valve seat support 6 and the sphere body 1. With this structural arrangement, the fixed bracket 12 can effectively maintain the stability between the sphere body 1 and the valve seat assembly 3. Further, when the valve seat support 6 moves towards the valve body 2, the relative stability between the sphere body 1 and the valve seat assembly 3 is maintained.

[0041] As a preferred embodiment, on the basis of the above method, further, the valve seat support 6 is provided with a fixed pin 13, and the fixed pin 13 is used to keep the valve seat support 6 stable. With this structural arrangement, the fixed pin 13 can effectively maintain the stability between the valve seat assembly 3 and the valve body 2. Further, when the valve seat support 6 moves towards the valve body 2, the relative stability between the valve body 2 and the valve seat assembly 3 is maintained.

[0042] In Embodiment 3: As Figures 1 to 4 shown, a low-temperature split fixed ball valve using a valve seat assembly described in the present utility model includes a sphere body 1 and a valve body 2. The sphere body 1 is used to control the valve to allow high-pressure media to flow, and the valve body 2 is used to maintain the stable state of the ball valve. A valve seat assembly 3 and a spring member 4 are provided between the sphere body 1 and the valve body 2. The valve seat assembly 3 is used to connect the sphere body 1 and the valve body 2. One side of the valve seat assembly 3 abuts against the surface of the sphere body 1, and there is a gap between the other side of the valve seat assembly 3 and the valve body 2. The spring member 4 is arranged at the gap between the valve seat assembly 3 and the valve body 2. One side of the spring member 4 is connected to the valve seat assembly 3, and there is a gap between the other side of the spring member 4 and the valve body 2. The spring member 4 is used to reduce the acting force of the valve seat assembly 3 hitting the valve body 2.

[0043] In this embodiment, the cooperation between the valve seat assembly 3 and the spring member 4 can effectively reduce the acting force of the spherical body 1 towards the valve body 2. When the spherical body 1 transmits the acting force towards the valve seat assembly 3, the valve seat assembly 3 moves towards the valve body 2. The gap between the valve seat assembly 3 and the valve body 2 can effectively reduce the impact frequency between the valve seat assembly 3 and the valve body 2. The spring member 4 can effectively reduce the acting force of the valve seat assembly 3 towards the valve body 2, further improving the service life of the valve body 2, the spherical body 1 and the valve seat assembly 3.

[0044] As a preferred embodiment, on the basis of the above method, further, the valve body 2 includes a left body 14 and a valve body base 15. The left body 14 cooperates with the spherical body 1 to form a conveying channel. The valve body base 15 is used to keep the spherical body 1 stable. The left body 14 is connected to the valve seat assembly 3. One side of the valve body base 15 is connected to the left body 14, and the other side of the valve body base 15 is connected to the spherical body 1. The central axis of the left body 14 is parallel to the central axis of the spherical body 1, and the central axis of the valve body base 15 coincides with the central axis of the spherical body 1. Taking the ground as the projection plane, the edge of the projection of the valve body 2 coincides with the edge of the spherical body 1.

[0045] In this embodiment, the left body 14 can effectively connect and cooperate with the valve seat assembly 3 to keep the valve body 2 stable. The valve body base 15 is connected and cooperated with the spherical body 1, further making the valve body 2, the valve seat assembly 3 and the spherical body 1 in a stable state, and further improving the practicality of the present invention in the actual use process.

[0046] Hexagonal nuts 16 are provided on the left body 14 and the valve body base 15, and the hexagonal nuts 16 are used to connect the left body 14 and the valve body base 15. With this structural arrangement, the hexagonal nuts 16 can effectively maintain the stable structure of the left body 14 and the valve body base 15, thereby maintaining the stability of the valve body 2 and further improving the service life of the valve body 2.

[0047] As a preferred embodiment, on the basis of the above method, further, the valve body 2 is provided with a footrest 17 facing the ground, and the footrest 17 is used to keep the valve body 2 in a stable state. With this structural arrangement, the footrest 17 can effectively reduce the kinetic energy when the spherical body 1 and the valve seat assembly 3 move. At the same time, the footrest 17 can keep the present invention stable in the actual use process, and further improve the practicality of the present invention in the actual use process.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A valve seat assembly, characterized in that, It includes a valve seat body and a valve seat support. One end of the valve seat body is connected to the valve seat support, and the other end of the valve seat body abuts against the sphere body. The valve seat body is used to slow down the acting force transmitted from the sphere body to the valve seat support. The valve seat support is used to connect the valve seat body and the valve body. The valve seat support is provided with a first groove facing the valve body, and the first groove keeps the valve seat support spaced from the valve body.

2. The valve seat assembly according to claim 1, characterized in that, The valve seat support is provided with a second groove facing the valve body, and a spring member is arranged in the second groove and connected to the valve seat support.

3. The valve seat assembly according to claim 2, characterized in that, The first groove is provided with a pressure reducing component, and the pressure reducing component includes a sliding member and a winding member. One side of the winding member is connected to the sliding member, and the other side of the winding member has a gap with the valve body. One side of the sliding member is connected to the valve seat support. The winding member is used to reduce the acting force of the valve seat support towards the valve body, and the sliding member drives the winding member to move synchronously with the valve seat support.

4. The valve seat assembly according to claim 3, wherein, There is a gap at the connection between the winding member and the sliding member, and the gap is used to reduce the acting force between the winding member and the sliding member.

5. A valve seat assembly according to claim 4, characterized in that, The valve seat body is provided with a fixed bracket facing the sphere body. One end of the fixed bracket is connected to the sphere body, and the other end of the fixed bracket is connected to the valve seat assembly. The fixed bracket is used to keep a gap between the valve seat support and the sphere body.

6. A valve seat assembly according to claim 5, characterized in that, The valve seat support is provided with a fixed pin, and the fixed pin is used to keep the valve seat support stable.

7. A cryogenic split fixed ball valve employing a valve seat assembly, characterized in that, It includes the valve seat assembly according to any one of claims 1-6, and also includes a sphere body and a valve body. The sphere body is used to control the valve to allow high-pressure medium to flow through. The valve body is used to keep the ball valve in a stable state. A valve seat assembly and a spring member are arranged between the sphere body and the valve body. The valve seat assembly is used to connect the sphere body and the valve body. One side of the valve seat assembly abuts against the surface of the sphere body, and there is a gap between the other side of the valve seat assembly and the valve body. The spring member is arranged at the gap between the valve seat assembly and the valve body. One side of the spring member is connected to the valve seat assembly, and there is a gap between the other side of the spring member and the valve body. The spring member is used to reduce the acting force of the valve seat assembly towards the valve body when it impacts.

8. The cryogenic split fixed ball valve adopting a valve seat assembly according to claim 7, characterized in that The valve body includes a left body and a valve body base. The left body cooperates with the sphere body to form a conveying channel. The valve body base is used to keep the sphere body stable. The left body is connected to the valve seat assembly. One side of the valve body base is connected to the left body, and the other side of the valve body base is connected to the sphere body. The central axis of the left body is parallel to the central axis of the sphere body, and the central axis of the valve body base coincides with the central axis of the sphere body. Taking the ground as the projection plane, the edge of the projection of the valve body coincides with the edge of the sphere body.

9. The cryogenic split fixed ball valve using a valve seat assembly according to claim 8, wherein, The left body and the valve body base are provided with hex nuts, and the hex nuts are used to connect the left body and the valve body base.

10. A cryogenic split fixed ball valve using a valve seat assembly according to claim 9, characterized in that, The valve body is provided with a footrest facing the ground, and the footrest is used to keep the valve body in a stable state.

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