Valve core quick change structure

Abstract

The utility model discloses a valve core quick change structure belongs to pressure relief valve technical field, including valve body, valve core subassembly and installation subassembly, the top of valve body is equipped with the mounting groove, the bottom of mounting groove is provided with the sealed cavity, valve core subassembly includes valve seat, the valve seat sealed sliding installation is in sealed cavity, the inside sealed sliding installation of valve seat has the valve clack, the top fixed mounting of valve clack has the valve rod, the valve rod is connected with the adjusting screw sliding, the adjusting screw is connected with the mounting panel thread, the utility model through setting installation subassembly, simple structure, convenient and practical, can install valve core subassembly stably in valve body top, and through setting the joint and the carding seat, it is convenient to simple and quick to dismantle two groups of symmetrical installation snap ring, avoids the damage to valve body and external pipeline, improves the efficiency of the valve core, and improves the service life of valve body.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, specifically a quick-change valve core structure. Background Technology

[0002] A pressure relief valve is an automatic valve, mainly installed on pressurized equipment, pipelines, or containers. When the system pressure exceeds a preset safety value, it automatically opens to release excess pressure and automatically closes after the pressure drops to a specified range, thus preventing equipment damage or safety accidents due to overpressure. Based on its structure, it can be divided into spring-loaded, lever-operated, and pilot-operated types. Core performance parameters include opening pressure, discharge capacity, and reseating pressure. A pressure relief valve typically consists of main components such as a valve body, valve core, and valve seat. The valve body is the main body of the pressure relief valve, used to support other components and connect to pipelines or equipment. The valve core includes a valve disc and spring, etc. The valve disc is in sealing contact with the valve seat and is the core component of the pressure relief valve. It can withstand system pressure and opens or closes the flow passage under pressure. The valve seat surface must be smooth and wear-resistant to ensure the sealing performance when the pressure relief valve opens and closes. The spring is an important adjusting component used to control the opening pressure of the valve disc.

[0003] When a pressure relief valve exhibits abnormal performance, reaches its maintenance cycle, undergoes a change in operating conditions, or requires troubleshooting, the valve core needs to be disassembled for repair. If irreversible damage occurs to any components of the valve core, it must be replaced. In existing technologies, the pressure relief valve needs to be disassembled using specialized tools, which is quite difficult. Furthermore, turning the valve core may cause the valve body to rotate, potentially damaging the connection between the valve body and the pipeline and affecting its service life. Currently, there is no solution to this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-change valve core structure. By setting an installation component, the valve core assembly can be stably installed on the top of the valve body. By setting a snap-fit ​​connector and snap-fit ​​seat, it is easy and quick to disassemble the two sets of symmetrical installation snap rings, avoiding damage to the valve body and external pipelines, improving the efficiency of valve core replacement, and extending the service life of the valve body, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A quick-change valve core structure includes a valve body, a valve core assembly, and a mounting assembly; The top of the valve body is provided with a mounting groove, and the bottom of the mounting groove is provided with a sealing cavity; The valve core assembly includes a valve seat, which is slidably and sealingly mounted in a sealing cavity. A valve disc is slidably and sealingly mounted inside the valve seat. A valve stem is fixedly mounted on the top of the valve disc. The valve stem is slidably connected to an adjusting screw, and the adjusting screw is threadedly connected to a mounting plate. The mounting assembly includes two sets of symmetrically arranged mounting rings. The mounting rings are engaged with the outside of the mounting groove and the mounting plate. One end of the two sets of mounting rings is rotatably connected by a rotating shaft. The other end of the two sets of mounting rings is respectively fixedly mounted with a connector and a connector seat. The connector is engaged with the connector seat.

[0006] Preferably, the bottom of the valve body is provided with a medium inlet, and one side of the valve body is provided with a pressure relief port.

[0007] Preferably, a pressure relief hole is provided on one side of the valve seat, and the pressure relief hole faces the pressure relief port.

[0008] Preferably, an alignment block is fixedly installed on the other side of the valve seat, the alignment block is slidably engaged with the alignment groove, and the alignment groove is formed on one side of the inner wall of the sealing cavity.

[0009] Preferably, a spring is slidably sleeved on the surface of the valve stem, and the bottom of the spring abuts against the valve disc.

[0010] Preferably, the adjusting screw includes a screw body, which is threadedly connected to the mounting plate.

[0011] Preferably, a limiting plate is fixedly installed at the bottom of the screw body, and the limiting plate is disposed on the inner wall of the sealing cavity and can rotate within the sealing cavity.

[0012] Preferably, the bottom of the limiting plate abuts against the top of the spring, and a screw nut is fixedly installed on the top of the screw body.

[0013] Preferably, the mounting plate is slidably installed in the mounting groove, and a connecting seat is fixedly installed on the top of the mounting ring.

[0014] Preferably, the connecting seat is snapped into the sealing sleeve, and the bottom of the sealing sleeve is integrally formed with a limit ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a simple and convenient installation component that allows for stable mounting of the valve core assembly on top of the valve body. The inclusion of snap-fit ​​connectors and seats facilitates quick and easy disassembly of the two symmetrical mounting rings, preventing damage to the valve body and external piping. This improves the efficiency of valve core replacement and extends the valve body's lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body; Figure 3 A schematic diagram of the clasp structure; Figure 4 This is a schematic diagram of the valve core assembly structure; Figure 5 This is a schematic diagram of the adjusting screw structure.

[0017] In the diagram: 1. Valve body; 2. Mounting groove; 3. Sealing cavity; 4. Valve seat; 5. Valve disc; 6. Valve stem; 7. Adjusting screw; 701. Screw body; 702. Limiting plate; 703. Tightening nut; 8. Mounting plate; 9. Mounting retaining ring; 10. Rotating shaft; 11. Snap-fit ​​connector; 12. Snap-fit ​​seat; 13. Medium inlet; 14. Pressure relief port; 15. Pressure relief hole; 16. Alignment block; 17. Alignment groove; 18. Spring; 19. Connecting seat; 20. Sealing sleeve; 21. Limiting ring. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-5 This utility model provides a technical solution: A quick-change valve core structure includes a valve body 1, a medium inlet 13 at the bottom of the valve body 1, a pressure relief port 14 on one side of the valve body 1, an installation groove 2 at the top of the valve body 1, and a sealing cavity 3 at the bottom of the installation groove 2.

[0020] The valve body 1 serves primarily to support other components. The medium inlet 13 at the bottom of the valve body 1 is used to connect the medium (such as liquid or gas) to the pressure to be controlled, while the pressure relief port 14 on one side safely discharges excess medium when the system is overpressured. The mounting groove 2 at the top provides assembly space for the mounting components and valve core assembly, while the sealing cavity 3 at the bottom provides a sealing environment for the valve seat 4. The inner wall of the valve seat 4 is smooth and tightly connected to the sealing cavity 3, preventing it from moving up and down under fluid impact. During disassembly, it can be hooked and pulled upwards using a tool. Simultaneously, the alignment groove 17 on the inner wall cooperates with the alignment block 16 of the valve seat 4 to ensure the accurate positioning of the valve seat 4 during installation, preventing misalignment between the pressure relief hole 15 and the pressure relief port 14, ensuring unobstructed pressure relief channels, and providing structural support and a medium flow path for the stable operation of the valve core assembly.

[0021] It also includes a valve core assembly, which includes a valve seat 4. The valve seat 4 is slidably and sealingly mounted in a sealing cavity 3. A valve disc 5 is slidably and sealingly mounted inside the valve seat 4. A valve stem 6 is fixedly mounted on the top of the valve disc 5. The valve stem 6 is slidably connected to an adjusting screw 7. The adjusting screw 7 is threadedly connected to a mounting plate 8. A pressure relief hole 15 is provided on one side of the valve seat 4, facing a pressure relief port 14. An alignment block 16 is fixedly mounted on the other side of the valve seat 4. The alignment block 16 is slidably engaged with an alignment groove 17. The alignment groove 17 is... On one side of the inner wall of the sealing cavity 3, a spring 18 is slidably sleeved on the surface of the valve stem 6. The bottom of the spring 18 abuts against the valve disc 5. The adjusting screw 7 includes a screw body 701, which is threadedly connected to the mounting plate 8. A limiting plate 702 is fixedly installed at the bottom of the screw body 701. The limiting plate 702 is set on the inner wall of the sealing cavity 3 and can rotate within the sealing cavity 3. The bottom of the limiting plate 702 abuts against the top of the spring 18. A tightening nut 703 is fixedly installed at the top of the screw body 701.

[0022] The valve core assembly is designed to provide pressure relief. The valve seat 4 is sealed within the sealing cavity 3, and its pressure relief hole 15 connects with the pressure relief port 14 of the valve body 1 when the valve disc 5 is open, forming a pressure relief channel. The valve disc 5 and valve seat 4 are sealed together; under normal conditions, the valve disc 5 is tightly pressed against the valve seat 4 by the pressure of the spring 18, blocking the flow of media. When there is overpressure, the valve disc 5 is pushed upwards by the media, overcoming the force of the spring 18, thus opening the pressure relief channel. The valve stem 6 connects the valve disc 5 and the spring 18, acting as a guide to ensure the valve disc 5 moves vertically. The bottom of the spring 18 abuts against the valve disc 5, and its top is compressed by the limiting plate 702 of the adjusting screw 7. Its preload determines the opening pressure of the valve disc 5. Tightening the adjusting screw 7's tightening nut 703 changes the compression of the spring 18, thereby adjusting the preset pressure relief pressure. The mounting plate 8 provides a threaded mounting base for the adjusting screw 7 and, together with the mounting components, fixes the overall position of the valve core assembly.

[0023] It also includes an installation component, which includes two sets of symmetrically arranged installation rings 9. The installation rings 9 are engaged with the outside of the installation groove 2 and the installation plate 8. One end of the two sets of installation rings 9 is rotatably connected by a rotating shaft 10. The other end of the two sets of installation rings 9 is respectively fixedly installed with a connector 11 and a connector seat 12. The connector 11 is engaged with the connector seat 12. The installation plate 8 is slidably installed in the installation groove 2. A limiting block is fixedly installed on one side of the installation plate 8. A limiting groove is opened in the installation groove 2 to cooperate with the limiting block. The limiting block and the limiting groove are slidably engaged. A connecting seat 19 is fixedly installed on the top of the installation rings 9. A sealing sleeve 20 is engaged in the connecting seat 19. A limiting ring 21 is integrally formed at the bottom of the sealing sleeve 20.

[0024] By setting up the installation components, the core function is to achieve quick disassembly and stable fixation of the valve core assembly. Two sets of symmetrical installation rings 9 are rotatably connected by a rotating shaft 10 at one end and a snap-fit ​​connector 11 at the other end engages with a snap-fit ​​seat 12. This allows them to quickly grip the outside of the installation groove 2 and the installation plate 8, firmly locking the installation plate 8 to the top of the valve body 1. The sealing sleeve 20 is snapped into the connecting seat 19 at the top of the installation ring 9, which, together with the limiting ring 21 at the bottom, not only forms a sealing protection for the top of the installation plate 8 but also prevents external impurities from contacting the adjusting screw 7 and other structures. By replacing the traditional threaded connection with the snap-fit ​​structure, no tools are needed to tighten it during disassembly, avoiding damage to the connection between the valve body 1 and the external pipeline caused by the rotation of the valve core assembly. This significantly improves the replacement efficiency of the valve core assembly and extends the service life of the valve body 1. The setting of the limiting block and the limiting groove can prevent the installation plate 8 from rotating when the adjusting screw 7 is rotated to adjust the pressure relief of the valve core assembly, thereby improving the adjustment efficiency and ensuring smooth adjustment.

[0025] Among them, the sealing sleeve 20 uses fluororubber as the core material. This material has excellent high and low temperature resistance (applicable temperature range -20℃-200℃), corrosion resistance (resistant to oil, acid and alkali media and most industrial fluids) and sealing stability. It can maintain elasticity for a long time, effectively blocking external impurities from entering the sealing cavity. At the same time, it is suitable for the pressure fluctuation environment when the pressure relief valve is working, and avoids sealing failure due to material aging and deformation. The valve seat 4 and valve disc 5 are made of stainless steel as the base material, and are treated by sandblasting and hard anodizing (film thickness ≥15μm) to improve wear and corrosion resistance. The valve stem 6 is made of 304 stainless steel base with chemical nickel-phosphorus plating (plating layer 8-12μm) to ensure smooth sliding. The adjusting screw 7 is made of carbon steel as the base material, and is treated by hot-dip galvanizing (≥65μm) and passivation for double protection to prevent rust from affecting adjustment. The spring 18 is made of SUS304 stainless steel in one piece, and is treated by low temperature tempering and electrolytic polishing to enhance corrosion resistance and elastic stability.

[0026] In practical use, install the device in the designated position. First, connect and fix it to the system pipeline through the medium inlet 13 at the bottom of the valve body 1, ensuring that the pressure relief port 14 on one side of the valve body 1 leads to the safe discharge channel. During installation, the alignment block 16 of the valve seat 4 must be precisely matched with the alignment groove 17 on the inner wall of the sealing cavity 3, ensuring that the pressure relief hole 15 of the valve seat 4 faces the pressure relief port 14. Then, put the entire valve core assembly into the sealing cavity 3, and embed the mounting plate 8 into the mounting groove 2 at the top of the valve body 1, so that the limiting block engages with the limiting groove. Move the two sets of mounting rings 9 to align them with the outside of the mounting groove 2, and then close the two sets of symmetrical mounting rings 9 to make them hug the outside of the mounting groove 2 and the mounting plate 8. Fix it by engaging the snap-fit ​​connector 11 with the snap-fit ​​seat 12. Finally, snap the sealing sleeve 20 into the connecting seat. 19. The sealing is limited and sealed by the limiting ring 21. Before use, the sealing sleeve 20 can be pulled out upwards. By turning the turning nut 703 of the adjusting screw 7, the preload of the spring 18 can be adjusted to set the required pressure relief. After adjustment, the sealing sleeve 20 can be reinstalled. When the system pressure is normal, the valve disc 5 is sealed with the valve seat 4 under the action of the spring 18. When there is overpressure, the valve disc 5 is pressed upwards and the medium is discharged through the pressure relief hole 15 and the pressure relief port 14. When maintaining or replacing the valve core, simply press the clamping head 11 in the clamping seat 12, then use an external tool to insert into the gap between the mounting rings 9, and then pry the two to both sides. Then separate the clamping head 11 and the clamping seat 12, rotate and flip the mounting rings 9, and pull the valve core assembly upwards to remove it. There is no need to disassemble the valve body 1 and the pipeline.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change valve core structure, characterized in that, This includes the valve body, valve core assembly, and mounting components; The top of the valve body is provided with a mounting groove, and the bottom of the mounting groove is provided with a sealing cavity; The valve core assembly includes a valve seat, which is slidably and sealingly mounted in a sealing cavity. A valve disc is slidably and sealingly mounted inside the valve seat. A valve stem is fixedly mounted on the top of the valve disc. The valve stem is slidably connected to an adjusting screw, and the adjusting screw is threadedly connected to a mounting plate. The mounting assembly includes two sets of symmetrically arranged mounting rings. The mounting rings are engaged with the outside of the mounting groove and the mounting plate. One end of the two sets of mounting rings is rotatably connected by a rotating shaft. The other end of the two sets of mounting rings is respectively fixedly mounted with a connector and a connector seat. The connector is engaged with the connector seat.

2. The valve core quick-change structure according to claim 1, characterized in that: The valve body has a medium inlet at the bottom and a pressure relief port on one side.

3. The quick-change valve core structure according to claim 1, characterized in that: A pressure relief hole is provided on one side of the valve seat, and the pressure relief hole faces the pressure relief port.

4. The valve core quick-change structure according to claim 3, characterized in that: An alignment block is fixedly installed on the other side of the valve seat. The alignment block slides in conjunction with the alignment groove, which is located on one inner wall of the sealing cavity.

5. The valve core quick-change structure according to claim 1, characterized in that: A spring is slidably sleeved on the surface of the valve stem, and the bottom of the spring abuts against the valve disc.

6. The valve core quick-change structure according to claim 1, characterized in that: The adjusting screw includes a screw body, which is threadedly connected to the mounting plate.

7. The quick-change valve core structure according to claim 6, characterized in that: A limiting plate is fixedly installed at the bottom of the screw body. The limiting plate is located on the inner wall of the sealing cavity and can rotate within the sealing cavity.

8. The valve core quick-change structure according to claim 7, characterized in that: The bottom of the limiting plate abuts against the top of the spring, and a screw nut is fixedly installed on the top of the screw body.

9. The quick-change valve core structure according to claim 1, characterized in that: The mounting plate is slidably installed in the mounting groove, and a connecting seat is fixedly installed on the top of the mounting ring.

10. The valve core quick-change structure according to claim 9, characterized in that: The connector is snapped into the sealing sleeve, and the bottom of the sealing sleeve is integrally formed with a limit ring.

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