High-pressure and high-temperature corrosion-resistant composite structure ball valve

Abstract

The utility model relates to ball valve technical field, and disclose a kind of high-pressure high-temperature corrosion composite structure ball valve, including valve body assembly, the top middle part of valve body assembly is provided with stem pipeline, the upper end outside of stem pipeline is sleeved with panel nut, the top outside of stem pipeline is sleeved with manual assembly, the inside of valve body assembly, the stem pipeline and the inside of manual assembly are penetrated and are provided with rotating assembly, the upper end inside of stem pipeline and the outside wall between rotating assembly are provided with packing bolt. By rotating assembly, stem and hollow ball body integral type fixed connection are used, cooperate wear-resistant support ring, the structure rigidity and deformation resistance ability are greatly improved, can stably bear high pressure and wide temperature environment, effectively resist high temperature corrosion;Through the synergistic effect of live load type inner ring component and self-compensating packing seat, the sealing gap can be automatically compensated with the slight wear of valve stem, combined with the pre-tightening force of packing bolt, the sealing reliability between stem pipeline and rotating assembly is significantly enhanced.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a high-pressure, high-temperature, and corrosion-resistant composite structure ball valve. Background Technology

[0002] In the field of fluid control under high pressure, high temperature and corrosive conditions, the existing ball valve stem and ball are mostly connected by a separate structure, which has insufficient joint strength. Under high pressure and drastic temperature changes, it is prone to deformation or loosening. In addition, the poor wear resistance of the support ring leads to misalignment of the sealing surface inside the valve body. This not only reduces the structural rigidity, but also aggravates the corrosion of the connection parts by the high temperature medium and shortens the service life.

[0003] Traditional packing structures lack wear compensation capabilities. After long-term rotation of the valve stem, the sealing gap increases, and under thermal cycling, the packing is prone to aging and hardening, leading to seal failure between the stem pipe and the valve stem, causing media leakage. There is generally a flow dead zone between the valve body and the ball, where the medium is prone to stagnation. In particular, corrosive media can cause localized erosion corrosion inside the valve body, affecting the medium flow efficiency and further weakening the structural strength of the valve body, making it difficult to meet the requirements for long-term stable operation under high pressure, high temperature and corrosive environments. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the field of fluid control under high pressure, high temperature and corrosion conditions, such as insufficient joint strength between the valve stem and the ball, poor wear resistance of the support ring leading to misalignment and corrosion of the sealing surface, lack of wear compensation of traditional packing and easy aging under thermal cycling causing leakage, and dead zone between the valve body and the ball leading to medium retention and corrosion. This utility model provides a high pressure, high temperature and corrosion resistant composite structure ball valve.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A high-pressure, high-temperature, and corrosion-resistant composite ball valve includes a valve body assembly. A rod pipe is located at the top center of the valve body assembly. A panel nut is fitted onto the outer side of the upper end of the rod pipe. A manual assembly is fitted onto the outer side of the top end of the rod pipe. A rotating assembly extends through the inner sides of the valve body assembly, the rod pipe, and the manual assembly. A packing bolt is located between the inner side of the upper end of the rod pipe and the outer side of the rotating assembly. An inner ring assembly is located between the inner side of the rod pipe and the outer side of the rotating assembly, and at the bottom side of the packing bolt. A packing seat is fitted onto the outer side of the rotating assembly at the bottom side of the inner ring assembly. Support rings are located at both ends of the inner center of the valve body assembly.

[0007] Furthermore, the valve body assembly includes a pipe shell, a valve body position, and a pipe channel. The rod pipe is located at the top of the valve body position, the outer side of the rotating assembly passes through the valve body position, the support rings are located at both ends of the valve body position, and the outer wall of the hollow ball is tightly fitted with the inner wall of the valve body position. Together with the support rings at both ends, a reliable seal is achieved under high pressure.

[0008] Furthermore, the valve body position and the pipe channel are located inside the pipe shell, and the pipe channel is located at both ends of the valve body position. The valve body position inside the pipe shell provides installation space for the hollow sphere.

[0009] Furthermore, the manual assembly includes a handle, a fixing screw, and a sleeve. The top end of the sleeve is fixedly connected to the bottom side of the handle, and the inner side of the sleeve is fitted onto the outer side of the top end of the rotating assembly. The fixing screw passes through the sleeve and the top sidewall of the rotating assembly. Driven by the manual assembly or an external pneumatic / electric actuator: In manual operation, the handle rotates the valve stem via the sleeve.

[0010] Furthermore, the rotating assembly includes a valve stem and a hollow ball. The upper outer side of the valve stem penetrates the packing seat and the inner side of the packing bolt. The top of the valve stem penetrates the bottom interior of the manual assembly. The hollow ball penetrates the inner middle of the valve body assembly. During rotation, the hollow ball rotates within the valve body position. When its internal channel is aligned with the pipe channel (open state), the medium can flow smoothly through the pipe channel and the hollow ball channel.

[0011] Furthermore, the bottom end of the valve stem is fixedly connected to the top end of the hollow sphere, and the one-piece design of the valve stem and the hollow sphere ensures structural rigidity.

[0012] Furthermore, the inner ring assembly includes an annular gasket and a packing area. The annular gasket and the packing area penetrate the inner side of the rod pipe. The packing area is located inside the annular gasket, and the packing seat is located on the bottom side of the annular gasket. The live load design allows the packing area to automatically compensate for minor wear of the valve stem, thereby improving thermal cycling performance.

[0013] Compared with the prior art, this utility model provides a high-pressure, high-temperature, and corrosion-resistant composite structure ball valve, which has the following beneficial effects:

[0014] This high-pressure, high-temperature, and corrosion-resistant composite ball valve features an integrated fixed connection between the valve stem and hollow ball via a rotating assembly. Combined with a wear-resistant support ring, this significantly enhances structural rigidity and deformation resistance, enabling it to stably withstand high pressure and wide temperature environments while effectively resisting high-temperature corrosion. The live-load-type inner ring assembly, working in tandem with the self-compensating packing seat, automatically compensates for minor wear of the valve stem, compensating for sealing gaps. Combined with the pre-tightening force of the packing bolts, this significantly improves the sealing reliability between the stem pipe and the rotating assembly, preventing leakage caused by thermal cycling. The jacking-in pressure relief design creates a dead-zone-free flow path between the valve body and the hollow ball, preventing localized corrosion caused by media stagnation and ensuring smooth media flow. The overall structure balances extreme operating conditions with ease of operation, significantly extending the valve's service life. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the outer side of the overall structure of this utility model;

[0016] Figure 2 The bottom three-dimensional view shows the manual components and related structures of this utility model;

[0017] Figure 3 A three-dimensional diagram showing the positional relationship between the rotating component and the seasoning bolt in this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional view showing the structural relationship between the valve body assembly, valve stem, and inner ring assembly of this utility model.

[0019] Figure 5 A three-dimensional diagram showing the positional relationship of the support ring inside the valve body assembly.

[0020] In the diagram: 1. Valve body assembly; 11. Pipe housing; 12. Valve body position; 13. Pipe passage; 2. Stem pipe; 3. Panel nut; 4. Manual assembly; 41. Handle; 42. Fixing screw; 43. Sleeve; 5. Rotary assembly; 51. Valve stem; 52. Hollow ball; 6. Packing bolt; 7. Inner ring assembly; 71. Annular gasket; 72. Packing area; 8. Packing seat; 9. Support ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0022] like Figure 4As shown, a high-pressure, high-temperature and corrosion-resistant composite structure ball valve includes a valve body assembly 1. The valve body assembly 1 includes a pipe shell 11, a valve body position 12 and a pipe channel 13. The valve body position 12 and the pipe channel 13 are located inside the pipe shell 11, and the pipe channel 13 is located at both ends of the valve body position 12. The entire device takes the valve body assembly 1 as the core carrier. The valve body position 12 inside the pipe shell 11 provides installation space for the hollow ball 52, and the pipe channels 13 at both ends serve as the medium flow path.

[0023] like Figure 2 As shown, a rod pipe 2 is provided at the top center of the valve body assembly 1. The rod pipe 2 is located at the top of the valve body position 12. A panel nut 3 is sleeved on the outer side of the upper end of the rod pipe 2. A manual assembly 4 is sleeved on the outer side of the top end of the rod pipe 2. The manual assembly 4 includes a handle 41, a fixing screw 42, and a sleeve 43. The top end of the sleeve 43 is fixedly connected to the bottom side of the handle 41. During operation, it can be driven by the manual assembly 4 or an external pneumatic / electric actuator: During manual operation, the handle 41 drives the valve stem 51 to rotate through the sleeve 43. The fixing screw 42 ensures that the sleeve 43 and the valve stem 51 are synchronously transmitted.

[0024] like Figure 2 and Figure 4 As shown, a rotating assembly 5 is installed inside the valve body assembly 1, the rod pipe 2, and the manual assembly 4. The inner side of the sleeve 43 is sleeved on the outer side of the top of the rotating assembly 5. The fixing screw 42 passes through the sleeve 43 and the top side wall of the rotating assembly 5. The rotating assembly 5 includes a valve stem 51 and a hollow ball 52. The bottom end of the valve stem 51 is fixedly connected to the top end of the hollow ball 52. The top end of the valve stem 51 passes through the bottom end of the manual assembly 4. The hollow ball 52 passes through the middle of the inner side of the valve body assembly 1. The outer side of the rotating assembly 5 passes through the valve body position 12. During rotation, the hollow ball 52 rotates inside the valve body position 12. When its internal channel is aligned with the pipe channel 13 (open state), the medium can flow smoothly through the pipe channel 13 and the hollow ball channel. Example 2:

[0025] like Figure 4 As shown, a packing bolt 6 is provided between the inner side of the upper end of the rod pipe 2 and the outer side wall of the rotating assembly 5. An inner ring assembly 7 is provided between the inner side of the rod pipe 2 and the outer side of the rotating assembly 5 and located at the bottom side of the packing bolt 6. The inner ring assembly 7 includes an annular gasket 71 and a packing area 72. The annular gasket 71 and the packing area 72 penetrate the inner side of the rod pipe 2. The packing area 72 is located inside the annular gasket 71. The inner ring assembly 7 (annular gasket 71 and packing area 72) between the rod pipe 2 and the valve stem 51 forms the main seal. The live load design allows the packing area 72 to automatically compensate for the slight wear of the valve stem 51, improving the thermal cycle performance.

[0026] like Figure 5As shown, a packing seat 8 is sleeved on the outer side of the rotating assembly 5 and the bottom side of the inner ring assembly 7. The packing seat 8 is located on the bottom side of the annular gasket 71. The upper outer side of the valve stem 51 passes through the packing seat 8 and the inner side of the packing bolt 6. Support rings 9 are provided at both ends of the inner middle part of the valve body assembly 1. The support rings 9 are located at both ends of the valve body position 12. The packing seat 8 and the packing bolt 6 further enhance the sealing effect.

[0027] Working principle: such as Figures 1-5 As shown, the entire device is based on the valve body assembly 1 as the core carrier. The valve body position 12 inside the pipe shell 11 provides installation space for the hollow ball 52. The pipe channels 13 at both ends serve as the medium flow path. The rotating assembly 5 is the core of the function execution. The integrated design of the valve stem 51 and the hollow ball 52 ensures structural rigidity, adapts to a maximum working pressure of 3000 psig (207 bar) and a wide temperature range (-65F to 300F), and effectively resists deformation and high temperature corrosion under high pressure.

[0028] During operation, it can be driven by manual component 4 or an external pneumatic / electric actuator: In manual operation, handle 41 drives valve stem 51 to rotate through sleeve 43, and fixing screw 42 ensures that sleeve 43 and valve stem 51 are synchronously transmitted; during rotation, hollow ball 52 rotates in valve body position 12. When its internal channel is aligned with pipe channel 13 (open state), the medium can flow smoothly through pipe channel 13 and hollow ball channel. Due to the top-in pressure relief design, there is no dead zone between the ball valve and valve chamber, avoiding medium stagnation; when the channels are misaligned (closed state), the outer wall of hollow ball 52 is tightly fitted with the inner wall of valve body position 12, and with the support rings 9 at both ends, a reliable seal under high pressure is achieved;

[0029] The sealing performance is ensured through a multi-layer structure: the inner ring assembly 7 (annular gasket 71 and packing area 72) between the stem pipe 2 and the valve stem 51 forms the main seal, the packing seat 8 and the packing bolt 6 further enhance the sealing effect, and the live load design allows the packing area 72 to automatically compensate for the slight wear of the valve stem 51, improve the thermal cycle performance, and avoid sealing failure caused by temperature changes.

[0030] In addition, the panel nut 3 reinforces the connection between the rod pipe 2 and the valve body assembly 1, improving the overall structural stability and adapting to a size range of 1 / 16 to 3 / 4 inch (3mm to 18mm) to meet different pipeline installation requirements.

Claims

1. A high-pressure, high-temperature, and corrosion-resistant composite ball valve, comprising a valve body assembly (1), characterized in that: The valve body assembly (1) includes a valve body position (12). A rod pipe (2) is provided at the top center of the valve body assembly (1). A panel nut (3) is sleeved on the outer side of the upper end of the rod pipe (2). A manual component (4) is sleeved on the outer side of the top end of the rod pipe (2). A rotating component (5) is provided through the inner side of the valve body assembly (1), the rod pipe (2) and the manual component (4). The rotating assembly (5) includes a valve stem (51) and a hollow ball (52), with the bottom end of the valve stem (51) fixedly connected to the top end of the hollow ball (52); A packing bolt (6) is provided between the inner side of the upper end of the rod pipe (2) and the outer side of the rotating assembly (5). A live-load inner ring assembly (7) is provided between the inner side of the rod pipe (2) and the outer side of the rotating assembly (5) and located at the bottom side of the packing bolt (6). A self-compensating packing seat (8) is sleeved on the outer side of the rotating assembly (5) at the bottom side of the inner ring assembly (7). Wear-resistant support rings (9) are provided at both ends of the inner middle part of the valve body assembly (1). The jacking pressure relief design makes a dead zone-free flow path formed between the valve body position (12) and the hollow ball (52).

2. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 1, characterized in that: The valve body assembly (1) further includes a pipe shell (11) and a pipe channel (13). The rod pipe (2) is located at the top of the valve body position (12). The outer side of the rotating assembly (5) passes through the valve body position (12). The support ring (9) is located at both ends of the valve body position (12).

3. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 2, characterized in that: The valve body position (12) and the pipe channel (13) are located inside the pipe shell (11), and the pipe channel (13) is located at both ends of the valve body position (12).

4. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 1, characterized in that: The manual component (4) includes a handle (41), a fixing screw (42), and a sleeve (43). The top end of the sleeve (43) is fixedly connected to the bottom side of the handle (41), and the inner side of the sleeve (43) is sleeved on the outer side of the top end of the rotating component (5). The fixing screw (42) passes through the sleeve (43) and the top side wall of the rotating component (5).

5. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 1, characterized in that: The upper outer side of the valve stem (51) penetrates the packing seat (8) and the inner side of the packing bolt (6), the top of the valve stem (51) penetrates the bottom interior of the manual assembly (4), and the hollow ball (52) penetrates the inner middle of the valve body assembly (1).

6. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 1, characterized in that: The inner ring assembly (7) includes an annular gasket (71) and a packing area (72). The annular gasket (71) and the packing area (72) penetrate the inner side of the rod pipe (2). The packing seat (8) is disposed on the bottom side of the annular gasket (71).

7. The high-pressure, high-temperature, and corrosion-resistant composite ball valve according to claim 6, characterized in that: The filler area (72) is located inside the annular gasket (71).

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