Safety valve in industrial gas filling process

Abstract

The utility model provides an industrial gas filling process safety valve which comprises a valve body, a gas inlet pipe is arranged at the bottom of the valve body, a pressure relief pipe is fixedly connected to one side of the valve body, a valve seat is fixedly connected in the valve body, a valve element is arranged in the valve body, a valve sleeve is arranged on the outer side of the valve element, and a valve core is arranged in the valve sleeve. The top of the valve element is fixedly connected with a spring bottom plate, and the top face of the spring bottom plate is fixedly connected with a first spring. The device has the advantage that the device is connected with an external structure through the air inlet pipe and the pressure relief pipe. When the air pressure is suddenly increased when the air is inflated, the valve element pushes the spring bottom plate to move upwards. The slopes of the locking blocks are pressed by the clamping grooves to move towards the containing grooves, the friction force of the slopes of the locking blocks is used for buffering air pressure impact, and adaptation time is bought for the first springs. And then the locking block is completely separated from the clamping groove, and the first spring normally contracts. The first spring is compressed slowly, and the problem that the service life of the spring assembly is affected due to instant compression is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to safety valves for industrial gas filling processes. Background Technology

[0002] Safety valves are used in pressurized equipment, containers, or pipelines as overpressure protection devices. When the pressure inside the equipment, container, or pipeline rises above the allowable value, the valve automatically opens and then releases the pressure completely to prevent the pressure inside the equipment, container, or pipeline from continuing to rise; when the pressure drops to the specified value, the valve should automatically and promptly close, thereby protecting the safe operation of the equipment, container, or pipeline.

[0003] Spring-loaded safety valves are widely used. They utilize the spring force to balance the pressure acting on the valve core. However, in practical applications, the gas pressure in the pipeline may increase instantaneously, causing the valve assembly in the valve body to move directly to its limit position and open the valve. The instantaneous compression of the spring assembly results in significant deformation, affecting the reliability and effective service life of the valve body assembly. Therefore, an improved safety valve for industrial gas filling processes is proposed. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a safety valve for industrial gas filling processes to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides a safety valve for industrial gas filling processes, including a valve body, an inlet pipe at the bottom of the valve body, a pressure relief pipe fixedly connected to one side of the valve body, a valve seat fixedly connected inside the valve body, a valve core inside the valve body, a valve sleeve outside the valve core, a spring base plate fixedly connected to the top of the valve core, a first spring fixedly connected to the top surface of the spring base plate, a spring top plate fixedly connected to the top of the first spring, a locking nut inside the valve body, an adjusting screw threadedly connected to the locking nut rotatably connected to the spring top plate, a slot on the inner wall of the valve body, a receiving groove on the side of the spring base plate, a locking block inserted into the receiving groove, a second spring between the locking block and the inner wall of the receiving groove, and inclined surfaces on the outer side of the locking block and the top wall of the slot.

[0007] Preferably, in any of the above embodiments, the bottom area, middle area, and top area of ​​the valve body, the air inlet pipe and the pressure relief pipe are all located in the bottom area of ​​the valve body, and the ends of the air inlet pipe and the pressure relief pipe are all provided with flanges.

[0008] Preferably, in any of the above embodiments, the bottom area and the middle area of ​​the valve body, and the middle area and the top area are fixedly connected by flanges and bolts and nuts, the valve seat has a groove with a V-shaped structure, and the bottom end of the valve core has a V-shaped structure.

[0009] The above technical solution employs the following: the valve body provides an installation platform for related components and a flow channel for gas. It is divided into a bottom section, a middle section, and a top section, connected sequentially by flanges, bolts, and nuts, facilitating disassembly and internal structural maintenance when needed. The inlet pipe allows industrial gas from external pipelines to enter the valve body, while the pressure relief pipe allows gas to escape after the valve body opens when the gas pressure is too high. Flanges are installed on the pressure relief pipe and the inlet pipe for easy connection to external pipelines. The valve seat, in conjunction with the valve core, seals the valve body, achieving gas isolation. A V-shaped groove is formed inside the valve seat, and the bottom of the valve core adopts a V-shaped structure; the combination of these two features ensures a good seal.

[0010] Preferably, in any of the above embodiments, the top surface of the spring base plate and the bottom surface of the spring top plate are both fixedly connected to a constraint post, and the first spring is sleeved on the outside of the constraint post.

[0011] The above technical solution employs a spring base plate and a spring top plate, which provide mounting platforms for the first spring and can retract under external force. Constraint posts are installed on the spring base plate and spring top plate to constrain the first spring sleeved on their outer sides, preventing displacement in other directions.

[0012] Preferably, in any of the above embodiments, a handle is provided on the outer side of the adjusting screw, and the locking nut is fixedly connected to the top area of ​​the valve body.

[0013] The above technical solution allows for adjustment of the position of the spring top plate using an adjusting screw and a locking nut, thereby adjusting the spring force of the first spring. A handle is provided on the outside of the adjusting screw for easy rotation by the operator.

[0014] Preferably, of any of the above solutions, there are several storage slots evenly arranged on the side of the spring base plate, a guide rod is fixedly connected inside the storage slot, and the locking block and the second spring are both sleeved on the outside of the guide rod.

[0015] The above technical solution employs a storage slot that provides storage space for the second spring and locking block. Several storage slots are evenly arranged, facilitating the installation of multiple sets of locking blocks. Supported by the elasticity of the second spring, the locking block, in conjunction with the slot, can buffer and absorb sudden increases in air pressure, utilizing the friction between their inclined surfaces to dissipate the air pressure. By installing guide rods within the storage slots, the guide rods can constrain the locking block and the second spring, preventing displacement in other directions.

[0016] Preferably, as described in any of the above embodiments, anti-slip pads are provided on the inclined surfaces of the slot and the locking block, and ball bearings are provided on the non-inclined outer surface of the locking block.

[0017] The above technical solution involves installing anti-slip pads on the inclined surfaces of the slot and locking block to further increase the friction between them, resulting in a more significant buffering effect. When the inclined surface of the locking block passes over the inclined surface of the slot, the friction disappears, allowing for normal compression of the first spring. Ball bearings are installed on the outer side of the locking block; these bearings reduce the friction between the locking block and the inner wall of the valve body, allowing the first spring to smoothly extend and retract.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0019] 1. This industrial gas filling process safety valve, through the installation of a spring base plate, a first spring, a spring top plate, as well as a retaining groove, a receiving groove, a locking block, and a second spring, is connected to an external structure via an inlet pipe and a pressure relief pipe. When the gas filling pressure suddenly increases, the valve core is pushed up, causing the spring base plate to move upward. During this process, the inclined surface of the locking block moves towards the receiving groove under the pressure of the retaining groove, and the friction between the inclined surfaces of the two surfaces buffers the pressure impact, giving the first spring time to adapt. Subsequently, the locking block completely disengages from the retaining groove, and the first spring retracts normally. The first spring is compressed slowly, effectively avoiding the problem of the spring assembly being compressed instantly, which would affect its lifespan.

[0020] 2. This industrial gas filling process safety valve features a V-shaped groove in the valve seat and a V-shaped structure at the bottom of the valve core; the combination of these two features helps ensure sealing performance. Constraint posts are installed on the spring base plate and spring top plate to constrain the first spring sleeved on its outer side, preventing displacement in other directions. A guide rod is installed in the receiving groove to constrain the locking block and the second spring, preventing displacement in other directions. Ball bearings are installed on the outside of the locking block to reduce friction between the locking block and the valve body wall, allowing the first spring to extend and retract smoothly.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a first-view structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 For the present utility model Figure 3 Schematic diagram of the structure at point A in the middle.

[0027] In the diagram: 1-valve body, 2-inlet pipe, 3-pressure relief pipe, 4-valve seat, 5-valve core, 6-valve sleeve, 7-spring base plate, 8-first spring, 9-spring top plate, 10-locking nut, 11-adjusting screw, 12-slot, 13-storage slot, 14-locking block, 15-second spring. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figures 1-4 As shown, this utility model includes a valve body 1, an air inlet pipe 2 at the bottom of the valve body 1, a pressure relief pipe 3 fixedly connected to one side of the valve body 1, a valve seat 4 fixedly connected inside the valve body 1, a valve core 5 inside the valve body 1, a valve sleeve 6 outside the valve core 5, a spring base plate 7 fixedly connected to the top of the valve core 5, a first spring 8 fixedly connected to the top surface of the spring base plate 7, a spring top plate 9 fixedly connected to the top of the first spring 8, a locking nut 10 inside the valve body 1, an adjusting screw 11 rotatably connected to the spring top plate 9 and threadedly connected to the locking nut 10, a slot 12 on the inner wall of the valve body 1, a storage groove 13 on the side of the spring base plate 7, a locking block 14 inserted into the storage groove 13, a second spring 15 between the locking block 14 and the inner wall of the storage groove 13, and inclined surfaces on the outer side of the locking block 14 and the top wall of the slot 12.

[0031] Example 1: The valve body 1 has a bottom, middle, and top section. The inlet pipe 2 and pressure relief pipe 3 are located in the bottom section of the valve body 1, and flanges are installed at the ends of both. The bottom and middle sections, and the middle and top sections of the valve body 1 are fixedly connected by flanges, bolts, and nuts. The valve seat 4 has a V-shaped groove, and the bottom of the valve core 5 also has a V-shaped structure. The valve body 1 provides an installation platform for related components and a flow channel for gas. Its bottom, middle, and top sections are connected sequentially by flanges, bolts, and nuts, facilitating disassembly and internal structure maintenance when needed. The inlet pipe 2 allows industrial gas from external pipelines to enter the valve body 1, while the pressure relief pipe 3 allows gas to escape when the valve body opens due to excessive pressure. Flanges are installed on the pressure relief pipe 3 and the inlet pipe 2 for easy connection to external pipelines. The valve seat 4, in conjunction with the valve core 5, can seal the valve body 1, achieving gas isolation. A V-shaped groove is provided inside the valve seat 4, and the bottom of the valve core 5 adopts a V-shaped structure. The combination of the two helps to ensure sealing performance.

[0032] Example 2: A constraint post is fixedly connected to the top surface of the spring base plate 7 and the bottom surface of the spring top plate 9. The first spring 8 is sleeved on the outside of this constraint post. The spring base plate 7 and the spring top plate 9 provide mounting platforms for the first spring 8 and can retract under external force. The constraint posts on the spring base plate 7 and the spring top plate 9 constrain the first spring 8 sleeved on their outside, preventing displacement in other directions. A handle is provided on the outside of the adjusting screw 11, and a locking nut 10 is fixedly connected to the top area of ​​the valve body 1. The adjusting screw 11, in conjunction with the locking nut 10, can adjust the position of the spring top plate 9, thereby adjusting the elastic force of the first spring 8. The handle on the outside of the adjusting screw 11 facilitates rotation by the operator.

[0033] Example 3: Several storage slots 13 are evenly arranged on the side of the spring base plate 7. A guide rod is fixedly connected inside the storage slot 13, and the locking block 14 and the second spring 15 are both sleeved on the outside of the guide rod. The storage slots 13 provide storage space for the second spring 15 and the locking block 14. The evenly arranged storage slots 13 provide conditions for the installation of multiple sets of locking blocks 14. Under the elastic support of the second spring 15, the locking block 14 can cooperate with the slot 12 to buffer and absorb sudden air pressure, that is, to consume air pressure by using the friction of the inclined surfaces of the two. By setting the guide rod inside the storage slot 13, the guide rod can constrain the locking block 14 and the second spring 15 to prevent them from displacing in other directions.

[0034] Anti-slip pads are provided on the inclined surfaces of both the slot 12 and the locking block 14, while ball bearings are provided on the non-inclined outer surface of the locking block 14. The anti-slip pads on the inclined surfaces of the slot 12 and the locking block 14 further increase the friction between them, making the cushioning effect more pronounced. When the inclined surface of the locking block 14 passes over the inclined surface of the slot 12, the friction disappears, achieving normal compression of the first spring 8. The ball bearings on the outer surface of the locking block 14 reduce the friction between the locking block 14 and the inner wall of the valve body 1, allowing the first spring 8 to smoothly extend and retract.

[0035] The working principle of this utility model is as follows:

[0036] S1. Connected to the external structure via the intake pipe 2 and the pressure relief pipe 3. When the gas pressure suddenly increases, the valve core 5 is lifted, pushing the spring base plate 7 upward;

[0037] S2. During the above process, the inclined surface of the locking block 14 moves towards the receiving groove 13 under the pressure of the slot 12, and uses the friction between the inclined surfaces to buffer the air pressure impact, giving the first spring 8 time to adapt.

[0038] S3. Subsequently, the locking block 14 completely disengages from the slot 12, and the first spring 8 retracts normally.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. This industrial gas filling process safety valve, through the arrangement of a spring base plate 7, a first spring 8, a spring top plate 9, a slot 12, a receiving slot 13, a locking block 14, and a second spring 15, is connected to an external structure via an inlet pipe 2 and a pressure relief pipe 3. When the gas filling pressure suddenly increases, the valve core 5 is lifted, pushing the spring base plate 7 upward. During this process, the inclined surface of the locking block 14 moves towards the receiving slot 13 under the pressure of the slot 12, and the friction between the inclined surfaces of the two surfaces buffers the pressure impact, giving the first spring 8 time to adapt. Subsequently, the locking block 14 completely disengages from the slot 12, and the first spring 8 retracts normally. The first spring 8 is compressed slowly, effectively avoiding the problem of the spring assembly being compressed instantly, thus affecting its lifespan.

[0041] 2. This industrial gas filling process safety valve features a V-shaped groove in the valve seat 4 and a V-shaped structure at the bottom of the valve core 5. The combination of these two elements helps ensure sealing performance. Constraint posts are installed on the spring base plate 7 and spring top plate 9 to constrain the first spring 8, which is sleeved on its outer side, preventing displacement in other directions. A guide rod is installed in the receiving groove 13 to constrain the locking block 14 and the second spring 15, preventing displacement in other directions. Ball bearings are installed on the outer side of the locking block 14 to reduce friction between the locking block 14 and the inner wall of the valve body 1, allowing the first spring 8 to extend and retract smoothly.

Claims

1. A safety valve for industrial gas filling process, comprising a valve body (1), an inlet pipe (2) provided at the bottom of the valve body (1), a pressure relief pipe (3) fixedly connected to one side of the valve body (1), a valve seat (4) fixedly connected inside the valve body (1), a valve core (5) provided inside the valve body (1), a valve sleeve (6) provided outside the valve core (5), a spring base plate (7) fixedly connected to the top of the valve core (5), a first spring (8) fixedly connected to the top surface of the spring base plate (7), a spring top plate (9) fixedly connected to the top of the first spring (8), a locking nut (10) provided inside the valve body (1), and an adjusting screw (11) rotatably connected to the spring top plate (9) and threadedly connected to the locking nut (10); characterized in that, The valve body (1) has a slot (12) on its inner wall and a storage slot (13) on its side. A locking block (14) is inserted into the storage slot (13). A second spring (15) is provided between the locking block (14) and the inner wall of the storage slot (13). The outer side of the locking block (14) and the top wall of the slot (12) are both provided with inclined surfaces.

2. The safety valve for industrial gas filling process as described in claim 1, characterized in that: The valve body (1) has a bottom area, a middle area and a top area. The air inlet pipe (2) and the pressure relief pipe (3) are both located in the bottom area of ​​the valve body (1). The ends of the air inlet pipe (2) and the pressure relief pipe (3) are both provided with flanges.

3. The safety valve for industrial gas filling process as described in claim 2, characterized in that: The bottom and middle sections of the valve body (1) and the top section are fixedly connected by flanges, bolts, and nuts. The valve seat (4) has a groove with a V-shaped structure, and the bottom end of the valve core (5) has a V-shaped structure.

4. The safety valve for industrial gas filling process as described in claim 3, characterized in that: The top surface of the spring base plate (7) and the bottom surface of the spring top plate (9) are both fixedly connected to constraint columns, and the first spring (8) is sleeved on the outside of the constraint column.

5. The safety valve for industrial gas filling process as described in claim 4, characterized in that: The adjusting screw (11) has a rotating handle on its outer side, and the locking nut (10) is fixedly connected to the top area of ​​the valve body (1).

6. The safety valve for industrial gas filling process as described in claim 5, characterized in that: There are several storage slots (13) and they are evenly arranged on the side of the spring base plate (7). A guide rod is fixedly connected inside the storage slot (13), and the locking block (14) and the second spring (15) are both sleeved on the outside of the guide rod.

7. The safety valve for industrial gas filling process as described in claim 6, characterized in that: Anti-slip pads are provided on the inclined surfaces of the slot (12) and the locking block (14), and ball bearings are provided on the non-inclined surface of the outer side of the locking block (14).

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