Corrosion-resistant double spring safety valve

Abstract

This utility model discloses a corrosion-resistant double-spring safety valve, relating to the field of spring safety valve technology. It includes a valve body with valve covers fixedly connected to both ends of the valve body's top. Two fixed rods are symmetrically fixedly connected to the top of each valve cover, with a top plate fixedly connected to the top of each rod. A valve stem is slidably connected to the middle of the valve cover, and a support block is fixedly connected to the top of the valve stem. This utility model allows adjustment of the rotation of the threaded rod to engage with a first pressing plate, causing the plate to move downwards in a predetermined direction, thereby applying longitudinal compressive force to the lifting plate. The screw structure of the threaded rod causes the first pressing plate to move vertically, generating a compressive force, thus achieving compression and pressing of the lifting plate. The core function is to adjust the distance between the support block and the lifting plate. By adjusting the relative position of the threaded rod and the first pressing plate, the distance between the lifting plate and the support block is precisely controlled, thereby adjusting the compressive force on the limiting spring and affecting the range of motion and pressure of the valve stem.

Description

Technical Field

[0001] This utility model relates to the field of spring safety valve technology, and in particular to a corrosion-resistant double spring safety valve. Background Technology

[0002] A spring-loaded safety valve is a device that limits the venting of a pressure cooker within a safe pressure range to ensure safe use. This valve can be classified into two types according to the ratio of valve disc opening height to flow channel diameter: spring-loaded low-pressure type and spring-loaded full-pressure type.

[0003] For example, CN222559344U discloses a double-spring safety valve, which includes a safety valve body and a connecting pipe. The upper surface of the safety valve body is provided with a lifter. The arc surface of the discharge pipe is provided with an adjustment device at the position corresponding to the connecting pipe. The adjustment device includes several fixed brackets. One end of each fixed bracket is fixedly connected to the arc surface of the discharge pipe. The inner wall of each fixed bracket is rotatably connected with a rotating rod. The arc surface of the rotating rod is threaded with a compression ring. The arc surface of the connecting pipe is fixedly connected with a connecting ring. The arc surface of the connecting ring is fixedly connected with a retaining frame at the position corresponding to the rotating rod. The cross-section of the retaining frame is "U". The inner wall of the retaining frame is engaged with the arc surface of the rotating rod. The ends of the connecting pipe and the discharge pipe that are close to each other are slidably connected to the same inner bushing.

[0004] However, in existing technologies, the elastic force of a single structure adjusting the spring or the movement of a valve stem are usually relied upon. Although these methods can accomplish basic control tasks, they often lack complex coordination and synergy between multiple components. Each component usually works independently and lacks dynamic feedback mechanisms or multi-level adjustment methods. Therefore, they cannot adapt to changing working environments or fine control requirements. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that usually relies on the elastic force of a single structure adjusting the spring or the action of a valve stem alone, and to propose a corrosion-resistant double spring safety valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a corrosion-resistant double spring safety valve, comprising a valve body, valve covers fixedly connected to both ends of the top of the valve body, two fixed rods symmetrically fixedly connected to the top of the valve covers, a top plate fixedly connected to the top of the fixed rods, a valve stem slidably connected to the middle of the valve cover, a support block fixedly connected to the top of the valve stem, a threaded rod threadedly connected to the middle of the top plate, a first pressing plate fixedly connected to the bottom of the threaded rod, a lifting plate abutting the bottom of the first pressing plate, and an adjustment mechanism installed between the two top plates;

[0007] The regulating mechanism includes a lead screw, the bottom end of which is rotatably connected to the top of the valve body, and a locking block is threaded onto the outer surface of the lead screw.

[0008] Preferably, a limit spring is provided between the support block and the lifting plate, and a protrusion is fixedly connected to both the support block and the lifting plate on opposite sides.

[0009] Preferably, guide blocks are fixedly connected to both sides of the lifting plate.

[0010] Preferably, the guide block is slidably connected to the fixed rod and is sleeved on the outer surface of the fixed rod.

[0011] Preferably, a second compression plate is fixedly connected to both sides of the card block.

[0012] Preferably, the second extrusion plate is sleeved on the outer surface of one of the fixed rods, and the second extrusion plate is located above one of the guide blocks.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by adjusting the rotation of the threaded rod, it can cooperate with the first extrusion plate, causing the plate to move downward in a predetermined direction, thereby applying longitudinal extrusion force to the lifting plate. The screw structure of the threaded rod causes the first extrusion plate to move in the vertical direction, generating extrusion force, thereby realizing the extrusion and compression of the lifting plate. The core function is to adjust the distance between the support block and the lifting plate. By adjusting the relative position of the threaded rod and the first extrusion plate, the distance between the lifting plate and the support block can be precisely controlled, thereby adjusting the extrusion force on the limit spring and affecting the range of motion and pressure of the valve stem.

[0015] 2. In this utility model, a feedback control mechanism is formed by the interaction between the valve stem and the limiting spring. The spring force is controlled by adjusting the gap between the support block and the lifting plate, which in turn affects the opening and closing of the valve. When the fluid pressure is greater than the squeezing force on the valve stem, the valve automatically opens to allow fluid flow, and vice versa to prevent leakage. The lifting plate plays a key role in the valve adjustment process. It is restricted by the first squeezing plate to ensure controlled movement in the vertical direction. At the same time, the guide block is controlled by the second squeezing plate to ensure accurate horizontal guidance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an anti-corrosion double spring safety valve proposed in this utility model;

[0017] Figure 2 This is a front view schematic diagram of the anti-corrosion double spring safety valve proposed in this utility model;

[0018] Figure 3 This is a partial three-dimensional structural diagram of an anti-corrosion double spring safety valve proposed in this utility model;

[0019] Figure 4This is a three-dimensional structural diagram of a corrosion-resistant double-spring safety valve proposed in this utility model.

[0020] Legend: 1. Valve body; 2. Valve cover; 21. Valve stem; 22. Fixing rod; 23. Support block; 24. Limiting spring; 25. Top plate; 26. Threaded rod; 261. First extrusion plate; 27. Lifting plate; 28. Guide block; 3. Adjustment mechanism; 31. Lead screw; 32. Locking block; 33. Second extrusion plate. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a corrosion-resistant double spring safety valve, including a valve body 1. Valve covers 2 are fixedly connected to both ends of the top of the valve body 1. Two fixing rods 22 are symmetrically fixedly connected to the top of the valve cover 2. A top plate 25 is fixedly connected to the top of the fixing rods 22. A valve stem 21 is slidably connected to the middle of the valve cover 2. A support block 23 is fixedly connected to the top of the valve stem 21. A threaded rod 26 is threadedly connected to the middle of the top plate 25. A first pressing plate 261 is fixedly connected to the bottom of the threaded rod 26. A lifting plate 27 is abutted against the bottom of the first pressing plate 261. An adjustment mechanism 3 is installed between the two top plates 25.

[0024] The regulating mechanism 3 includes a lead screw 31, the bottom end of which is rotatably connected to the top of the valve body 1, and a locking block 32 is threaded onto the outer surface of the lead screw 31.

[0025] The specific settings and functions of this embodiment are described below. By adjusting the rotation of the threaded rod 26, it can cooperate with the first pressing plate 261, causing the plate to move downwards in a predetermined direction, thereby achieving the effect of applying longitudinal pressing force to the lifting plate 27. Specifically, by rotating the threaded rod 26, its screw structure can move the first pressing plate 261 in the vertical direction. When the first pressing plate 261 moves downwards, it generates a certain pressing force, which then acts on the lifting plate 27, achieving the squeezing and compression of the lifting plate 27.

[0026] The core function of this process is to adjust the distance between the support block 23 and the lifting plate 27. By adjusting the relative position of the threaded rod 26 and the first pressing plate 261, the distance between the lifting plate 27 and the support block 23 can be precisely controlled, thereby further adjusting the pressing force on the limiting spring 24. The force state of the limiting spring 24 directly affects the range of motion and starting pressure of the valve stem 21, so this adjustment process is crucial for the precise control of the entire system. In this way, the support block 23 can drive the valve stem 21 to move when it moves, thereby adjusting the pressure applied to the valve stem 21 according to specific needs.

[0027] During this process, the rotation of the threaded rod 26 not only affects the position of the lifting plate 27, but also precisely controls the position of the locking block 32 through the lead screw 31. The rotation of the lead screw 31 allows the locking block 32 to adjust its position synchronously during the lifting process. The locking block 32 connects with the second pressing plate 33 during the lifting process, allowing the second pressing plate 33 to move together with the locking block 32.

[0028] The movement of the second pressing plate 33 is not only affected by the locking block 32, but also exerts a force on the guide block 28. The guide block 28, through its connection with the lifting plate 27, transmits the force to the lifting plate 27, thereby achieving precise control of the two lifting plates 27. This results in two adjustment methods, improving convenience.

[0029] Example 2: Figure 3 and Figure 4 As shown, a limit spring 24 is provided between the support block 23 and the lifting plate 27. Both the support block 23 and the lifting plate 27 have protrusions fixedly connected to their respective sides. Guide blocks 28 are fixedly connected to both sides of the lifting plate 27. The guide blocks 28 are slidably connected to the fixing rod 22 and are sleeved on the outer surface of the fixing rod 22. Second pressing plates 33 are fixedly connected to both sides of the locking block 32. The second pressing plates 33 are sleeved on the outer surface of one of the fixing rods 22 and are located above one of the guide blocks 28.

[0030] The overall effect of this embodiment is that the fluid pressure inside the valve body 1 acts on the valve stem 21. When the pressure inside the valve body 1 rises, the valve stem 21 moves upward accordingly. In this process, the interaction between the valve stem 21 and the limiting spring 24 plays a crucial role. Specifically, the limiting spring 24 applies pressure to the support block 23 through its own elastic force, forming a feedback control mechanism. The position of the support block 23 can be precisely adjusted through the gap between the lifting plate 27 and the support block 23, thereby changing the force applied by the limiting spring 24 to the support block 23. This adjustment directly affects the pressure on the valve stem 21, thus determining whether the valve opens or closes.

[0031] When the fluid pressure inside valve body 1 is greater than the squeezing force above valve stem 21, the valve will automatically open. This is because, under the action of the pressure difference, valve stem 21 overcomes the elastic force of limit spring 24, causing the valve to open and allowing fluid to flow through it. Conversely, when the fluid pressure inside valve body 1 is insufficient, the valve remains closed to prevent fluid leakage.

[0032] During valve adjustment, the lifting plate 27 plays a crucial role. The lifting plate 27 is not only restricted by the first pressing plate 261, maintaining controlled vertical movement, but also by the guide blocks 28 on both sides of the lifting plate 27, which are restricted by the second pressing plate 33, ensuring precise horizontal guidance. Specifically, the cooperation between the second pressing plate 33 and the guide blocks 28 ensures that the lifting plate 27 will not deviate or become unstable during adjustment. During adjustment, the second pressing plate 33 and the guide blocks 28 slide along the surface of the fixed rod 22. This sliding mechanism greatly improves the stability and accuracy of the entire adjustment system, ensuring precise valve control under different operating conditions.

[0033] The device's operation and working principle are as follows: During adjustment, rotating the threaded rod 26 moves the first pressing plate 261 downwards, applying pressure to the lifting plate 27. This adjusts the distance between the support block 23 and the lifting plate 27, thereby changing the pressure on the limit spring 24 and regulating the pressure when the support block 23 moves the valve stem 21. Simultaneously, rotating the lead screw 31 controls the position of the locking block 32, causing it to move the second pressing plate 33 during lifting. The second pressing plate 33 applies force to the guide block 28, which is transmitted to the lifting plate 27, thus simultaneously controlling the positions of both lifting plates 27. Alternatively, both lifting plates 27 can be controlled independently.

[0034] When pressure is applied inside the valve body 1, the valve stem 21 moves upward. At this time, the pressure of the limit spring 24 is transmitted to the support block 23. By adjusting the distance between the lifting plate 27 and the support block 23, the pressure of the limit spring 24 on the support block 23 can be changed, thereby changing the pressure on the valve stem 21. When the fluid pressure inside the valve body 1 is greater than the squeezing force above the valve stem 21, the valve will open.

[0035] During the adjustment process, the lifting plate 27 is restricted by the first pressing plate 261, and the guide blocks 28 on both sides are also restricted by the second pressing plate 33. Both the second pressing plate 33 and the guide blocks 28 can slide on the surface of the fixed rod 22, ensuring stability during adjustment.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A corrosion-resistant double-spring safety valve, comprising a valve body (1), wherein valve covers (2) are fixedly connected to both ends of the top of the valve body (1), characterized in that: The valve cover (2) has two fixed rods (22) symmetrically fixedly connected to the top. The top of the fixed rods (22) is fixedly connected to a top plate (25). The valve cover (2) has a valve stem (21) slidably connected to the middle. The valve stem (21) has a support block (23) fixedly connected to the top. The top plate (25) has a threaded rod (26) threadedly connected to the middle. The bottom of the threaded rod (26) is fixedly connected to a first extrusion plate (261). The bottom of the first extrusion plate (261) abuts against a lifting plate (27). An adjustment mechanism (3) is installed between the two top plates (25). The adjusting mechanism (3) includes a lead screw (31), the bottom end of which is rotatably connected to the top of the valve body (1), and a locking block (32) is threaded onto the outer surface of the lead screw (31).

2. The corrosion-resistant double spring safety valve according to claim 1, characterized in that: A limit spring (24) is provided between the support block (23) and the lifting plate (27), and a protrusion is fixedly connected to the support block (23) and the lifting plate (27) on opposite sides.

3. The corrosion-resistant double spring safety valve according to claim 1, characterized in that: Guide blocks (28) are fixedly connected to both sides of the lifting plate (27).

4. The corrosion-resistant double spring safety valve according to claim 3, characterized in that: The guide block (28) is slidably connected to the fixing rod (22) and is sleeved on the outer surface of the fixing rod (22).

5. The corrosion-resistant double spring safety valve according to claim 1, characterized in that: The card block (32) is fixedly connected to a second compression plate (33) on both sides.

6. The corrosion-resistant double spring safety valve according to claim 5, characterized in that: The second extrusion plate (33) is sleeved on the outer surface of one of the fixed rods (22), and the second extrusion plate (33) is located above one of the guide blocks (28).

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