Pneumatic corrugated pipe regulating valve

Abstract

The utility model relates to the technical field of valves, in particular to a pneumatic corrugated pipe regulating valve, which achieves the effect of self-enhanced sealing of medium pressure through the sealing fit of an inverted conical cavity and a conical surface of a valve head and the auxiliary sealing synergistic effect of a sealing ring. The technical problem that the sealing performance of a traditional plane valve seat is reduced due to medium impact under the high-pressure working condition is solved. Through the conical surface sealing fit of the inverted conical cavity and the valve head and the auxiliary sealing synergistic effect of the sealing ring, the effect of medium pressure self-enhanced sealing is achieved, and the technical problem that the sealing performance of a traditional plane valve seat is reduced due to medium impact under the high-pressure working condition is solved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a pneumatic bellows regulating valve. Background Technology

[0002] In modern chemical production processes, control valves, as core components of fluid control systems, directly affect the stability and safety of the process. Especially under harsh conditions such as high temperature and pressure, highly corrosive media, or highly toxic fluids, traditional valves face significant challenges in terms of sealing reliability, response speed, and durability.

[0003] Currently, pneumatic control valves using bellows seals have significant shortcomings under high-pressure conditions. When the system pressure is too high, the traditional line contact sealing method between the flat valve seat and the valve core is prone to micro-vibration due to media impact, which affects the sealing performance. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic bellows regulating valve to solve the problems mentioned in the background art.

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

[0006] A pneumatic bellows regulating valve, comprising

[0007] The valve body has a vertical platform that can be detachably mounted on its top by bolts, and a pneumatic actuator is installed at the top of the platform.

[0008] The valve seat is integrally formed on the inner middle part of the valve body. The valve head is provided below the valve seat, and an opening and closing mechanism is provided between the valve head and the pneumatic actuator.

[0009] Preferably, the pneumatic actuator includes a lower cover fixedly connected to the top of the platform, and an upper cover fixedly connected to the top of the lower cover by bolts. A diaphragm is fixedly connected between the upper cover and the lower cover. An air inlet is fixedly connected to the right side of the upper cover, and an air inlet is fixedly connected to the right side of the lower cover.

[0010] Preferably, the pneumatic actuator further includes a pressure plate fixedly connected to the upper end of the diaphragm, and a pressure rod vertically fixed between the pressure plate and the middle of the diaphragm, with a plurality of springs elastically connected between the pressure plate and the upper cover;

[0011] Preferably, the opening and closing mechanism includes a valve stem vertically fixed to the top of the valve head, the upper end of the valve stem passing through the valve seat and the valve body in sequence and fixedly connected to the lower end of the pressure rod, and a sealing ring fixedly connected to the outer wall at the bottom end of the valve head;

[0012] Preferably, the valve seat has an inverted conical cavity in the middle, and the valve head matches the inverted conical cavity;

[0013] Preferably, a bellows body is fixedly connected to the bottom end of the pressure rod, and the bottom end of the bellows body is fixedly connected to the inner bottom wall of the platform.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This pneumatic bellows regulating valve achieves a self-reinforcing sealing effect under medium pressure through the sealing cooperation between the inverted conical cavity and the conical surface of the valve head, as well as the auxiliary sealing effect of the sealing ring. This solves the technical problem of the traditional flat valve seat's sealing performance deteriorating due to medium impact under high pressure conditions.

[0016] 2. This pneumatic bellows regulating valve achieves rapid response and stable operation by coordinating the dual air inlet drive of the pneumatic actuator with the energy release of the spring, thus solving the technical problems of valve sluggish operation and insufficient actuator thrust under high pressure differential conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0018] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 For the present utility model Figure 1 Enlarged diagram of point B in the middle.

[0020] In the diagram: 1. Valve body; 2. Platform; 3. Valve seat; 4. Valve head; 5. Lower cover; 6. Upper cover; 7. Diaphragm; 8. Inlet nozzle one; 9. Inlet nozzle two; 10. Pressure plate; 11. Pressure rod; 12. Spring; 13. Valve stem; 14. Sealing ring; 15. Inverted conical cavity; 16. Bellows body. 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.

[0022] like Figure 1-3 As shown, this utility model provides a technical solution:

[0023] A pneumatic bellows regulating valve includes a valve body 1, the top of which is detachably mounted with a vertical platform 2 via bolts. A pneumatic actuator is disposed at the upper end of the platform 2. The pneumatic actuator includes a lower cover 5 fixedly connected to the top of the platform 2, and an upper cover 6 fixedly connected to the top of the lower cover 5 via bolts. A diaphragm 7 is fixedly connected between the upper cover 6 and the lower cover 5. An air inlet 8 is fixedly connected to the right side of the upper cover 6, and an air inlet 9 is fixedly connected to the right side of the lower cover 5. The pneumatic actuator also includes a pressure plate 10 fixedly connected to the upper end of the diaphragm 7, and a pressure rod 11 vertically fixed between the pressure plate 10 and the middle of the diaphragm 7, which is elastic between the pressure plate 10 and the upper cover 6. A number of springs 12 are connected; a valve seat 3 is integrally formed in the middle of the inner side of the valve body 1, a valve head 4 is provided below the valve seat 3, and an opening and closing mechanism is provided between the valve head 4 and the pneumatic actuator. The opening and closing mechanism includes a valve stem 13 vertically fixed to the top of the valve head 4. The upper end of the valve stem 13 passes through the valve seat 3 and the valve body 1 in sequence and is fixedly connected to the lower end of the pressure rod 11. A sealing ring 14 is fixedly connected to the outer wall of the bottom end of the valve head 4. An inverted conical cavity 15 is opened in the middle of the valve seat 3. The valve head 4 matches the inverted conical cavity 15. A bellows body 16 is fixedly connected to the bottom end of the pressure rod 11. The bottom end of the bellows body 16 is fixedly connected to the inner bottom wall of the platform 2.

[0024] In this embodiment, the conical sealing cooperation between the inverted conical cavity 15 and the valve head 4, as well as the auxiliary sealing synergy of the sealing ring 14, achieves the effect of self-reinforcing sealing under medium pressure, thus solving the technical problem of the traditional planar valve seat's sealing performance deteriorating due to medium impact under high pressure conditions.

[0025] Furthermore, by combining the dual air inlet drive of the pneumatic actuator with the energy release of the spring 12, a rapid response and stable operation are achieved, solving the technical problems of valve sluggishness and insufficient actuator thrust under high pressure differential conditions.

[0026] Working Principle: The pneumatic actuator at the top of the platform 2 is supplied with compressed air through inlet 8 and inlet 9 respectively. When compressed air enters through inlet 9 of the lower cover 5, it pushes the diaphragm 7 to deform upward, causing the pressure plate 10 to move upward and compressing the spring 12 located between the pressure plate 10 and the upper cover 6, storing its energy. The pressure rod 11 moves upward synchronously, pulling the valve head 4 upward through the valve stem 13, so that the conical sealing surface of the valve head 4 and the inverted conical cavity 15 of the valve seat 3 form a precise fit to achieve the main seal. At this time, the sealing ring 14 acts as an auxiliary sealing element, further enhancing the sealing effect at the connection between the valve head 4 and the inverted conical cavity 15. The pressure of the medium acts on the conical surface of the valve head 4, generating a radial component force, which increases the contact pressure of the sealing surface as the system pressure increases, forming a self-reinforcing sealing effect. When compressed air enters through inlet 8 of the upper cover 6, the diaphragm 7 returns to its original position downward, and the compressed spring 12 releases its elastic force to assist the mechanism in moving downward, causing the valve head 4 to disengage from the valve seat 3 and open. The bellows body 16 maintains a dynamic seal throughout the entire stroke, ensuring reliable isolation between the actuator and the valve body 1.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic bellows regulating valve, characterized in that: include The valve body (1) has a vertical platform (2) that can be detachably installed on its top end by bolts, and a pneumatic actuator is installed on the upper end of the platform (2); The valve seat (3) is integrally formed in the middle of the inner side of the valve body (1). A valve head (4) is provided below the valve seat (3). An opening and closing mechanism is provided between the valve head (4) and the pneumatic actuator. The pneumatic actuator includes a lower cover (5) fixedly connected to the top of the platform (2), and an upper cover (6) fixedly connected to the top of the lower cover (5) by bolts. A diaphragm (7) is fixedly connected between the upper cover (6) and the lower cover (5). An air inlet (8) is fixedly connected to the right side of the upper cover (6), and an air inlet (9) is fixedly connected to the right side of the lower cover (5). The pneumatic actuator also includes a pressure plate (10) fixedly connected to the upper end of the diaphragm (7), and a pressure rod (11) vertically fixed between the pressure plate (10) and the middle of the diaphragm (7). Several springs (12) are elastically connected between the pressure plate (10) and the upper cover (6). The opening and closing mechanism includes a valve stem (13) vertically fixed to the top of the valve head (4). The upper end of the valve stem (13) passes through the valve seat (3) and the valve body (1) in sequence and is fixedly connected to the lower end of the pressure rod (11). A sealing ring (14) is fixedly connected to the outer wall of the bottom end of the valve head (4). The valve seat (3) has an inverted conical cavity (15) in the middle, and the valve head (4) matches the inverted conical cavity (15); A bellows body (16) is fixedly connected to the bottom end of the pressure rod (11), and the bottom end of the bellows body (16) is fixedly connected to the inner bottom wall of the platform (2).

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