Overflow valve capable of safely and conveniently replacing pressure regulating spring
By designing a limit spring and a limit sleeve in the relief valve, combined with a ventilation hole, the risk of leakage and injury when replacing the pressure regulating spring in the prior art is solved, and a safe and convenient replacement process and normal operation of the relief valve are achieved.
Patent Information
- Application Number
- CN202422336416.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-25
AI Technical Summary
When replacing the pressure regulating spring, existing relief valves need to emptiate the entire fluid system, which poses a risk of leakage and a risk of injuring people when the valve core ejects.
An overflow valve including a valve core, a pressure regulating spring, a limiting spring, a limit sleeve, a adjusting rod and a valve body assembly is designed. Through the coordination of the limit spring and a limit sleeve, the valve core is prevented from leaking due to movement, and the sealing chamber pressure is prevented through the ventilation hole.
It realizes safety and convenience when replacing the pressure regulating spring, prevents leakage and injury risks caused by valve core movement, and ensures the normal operation of the overflow valve.
Smart Images
Figure CN222977506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of overflow valves, and particularly relates to an overflow valve for safely and conveniently replacing a pressure regulating spring. Background Technique
[0002] An overflow valve is a fluid pressure control valve, which mainly plays the roles of constant pressure overflow, voltage stabilization, system unloading and safety protection in fluid equipment. The overflow valve usually consists of components such as a valve body, a valve seat, a valve core and a spring. The spring provides a pre-tightening force for the valve core to press the valve core against the valve seat for sealing. When the thrust generated by the pressure in the "pressure chamber" on the valve core is greater than the pre-tightening force that the spring can provide, the valve core starts to move towards the spring direction, the seal fails, and the pressure is released. After long-term use, the spring will have a phenomenon of elastic decline. As the use time prolongs, when the spring elastic decline reaches the point where it cannot be adjusted, the pressure regulating spring needs to be replaced. When replacing the spring under the existing structure, the entire fluid system must be depressurized and emptied before the replacement operation can be carried out. As Figure 1 shown, after the system is emptied, the adjusting rod is disassembled, and the spring can be replaced after the adjusting rod is removed; if the fluid system is not completely emptied during the replacement operation, most of the residual medium in the system will be discharged from the discharge port to the waste gas system; and the fluid medium may push out the valve core to connect the fluid system with the air, which means there is a risk of leakage of the fluid medium in the system; at the same time, if the system pressure is too high, there is also a risk of the valve core popping out and hurting people after the fluid medium pushes out the valve core. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an overflow valve for safely and conveniently replacing a pressure regulating spring.
[0004] The purpose of the utility model is realized by the following technical solutions:
[0005] An overflow valve for safely and conveniently replacing a pressure regulating spring, comprising a valve core, a pressure regulating spring, a limiting spring, a limiting sleeve, an adjusting rod and a valve body assembly. The valve core is slidably arranged in the valve body assembly, and one end of the valve core is respectively matched with one ends of the pressure regulating spring and the limiting spring. One end of the limiting spring is matched with the limiting sleeve. The pressure regulating spring is arranged in the limiting spring and the other end is matched with the adjusting rod. The outer wall of the adjusting rod is in threaded cooperation with the inner wall of one end of the limiting sleeve, and the other end of the limiting sleeve is fixedly connected with the valve body assembly.
[0006] Furthermore, a stepped ring is arranged at the end of the valve core, and the ends of the pressure regulating spring and the limiting spring are both matched with the stepped ring.
[0007] Furthermore, a first limiting hole is arranged in the end of the limiting sleeve, and the end of the limiting spring is arranged in the first limiting hole and is matched with the first limiting hole.
[0008] Further, a second limiting hole is provided at the end of the adjusting rod, and the end of the pressure regulating spring is arranged in the second limiting hole and cooperates with the second limiting hole.
[0009] Further, the valve core, the pressure regulating spring and the limiting spring are coaxially arranged.
[0010] Further, the length of the pressure regulating spring is greater than the length of the limiting spring.
[0011] Further, the valve body assembly includes a valve body and a valve seat. The valve seat is fixedly arranged on the valve body in a sealed manner. An input channel cooperating with the valve core is arranged on the valve seat, an output channel cooperating with the valve core is arranged on the valve body, the valve core is slidably arranged in the valve body in a sealed manner, and the limiting sleeve is fixedly arranged on the valve body.
[0012] Further, the outer wall of the limiting sleeve and the inner wall of the valve body are connected by threads, and a locking ring is arranged on the outer wall of the limiting sleeve.
[0013] Further, a through ventilation hole is arranged on the adjusting rod.
[0014] Further, the end of the limiting spring and the bottom of the first limiting hole are in clearance fit.
[0015] The beneficial effects of the present utility model are as follows:
[0016] 1) In the present technology, after adding the limiting spring and the limiting sleeve, during the process of replacing the pressure regulating spring, the risk of leakage caused by the movement of the valve core is prevented. If the system pressure is too high, under the action of the limiting spring, the fluid medium will not eject the valve core, and there will be no risk of injury.
[0017] 2) In the present technology, the first limiting hole is provided to facilitate the limitation of the limiting spring, and the second limiting hole is provided to facilitate the limitation of the pressure regulating spring, preventing interference between the limiting spring and the pressure regulating spring.
[0018] 3) In the present technology, the ventilation hole is provided to facilitate the adjustment of the valve core, preventing the valve core from being unable to move due to the sealing between the limiting sleeve, the adjusting rod and the valve body. Description of the Drawings
[0019] Figure 1 is the internal connection structure diagram of the overflow valve in the prior art;
[0020] Figure 2 is the internal connection structure diagram of the present overflow valve;
[0021] Figure 3This is the internal connection structure diagram when replacing the pressure regulating spring of this overflow valve;
[0022] In the figure, 1 - spool, 2 - pressure regulating spring, 3 - limit spring, 4 - limit sleeve, 5 - adjusting rod, 6 - stepped ring, 7 - first limit hole, 8 - second limit hole, 9 - valve body, 10 - valve seat, 11 - input channel, 12 - output channel, 13 - locking ring, 14 - vent hole channel. Specific implementation mode
[0023] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.
[0024] Refer to Figures 2 - 3 , the present utility model provides a technical solution:
[0025] An overflow valve for safely and conveniently replacing the pressure regulating spring, including a spool 1, a pressure regulating spring 2, a limit spring 3, a limit sleeve 4, an adjusting rod 5 and a valve body assembly. The spool 1 is slidably arranged in the valve body assembly and one end thereof is respectively matched with one end of the pressure regulating spring 2 and the limit spring 3. One end of the limit spring 3 is matched with the limit sleeve 4. The pressure regulating spring 2 is arranged inside the limit spring 3 and the other end thereof is matched with the adjusting rod 5. The outer wall of the adjusting rod 5 is in threaded fit with the inner wall of one end of the limit sleeve 4. The other end of the limit sleeve 4 is fixedly connected to the valve body assembly. The spool 1, the pressure regulating spring 2 and the limit spring 3 are coaxially arranged. Among them, the valve body assembly is used to install the spool 1, the pressure regulating spring 2, the limit spring 3, the limit sleeve 4 and the adjusting rod 5. The limit sleeve 4 is fixedly installed on the valve body assembly. The adjusting rod 5 is installed on the limit sleeve 4. The spool 1 is installed in the valve body assembly. The limit spring 3 is installed between the limit sleeve 4 and the spool 1. The pressure regulating spring 2 is installed between the spool 1 and the adjusting rod 5. After installation, the pressure regulating spring 2 is in a compressed state. There is a clearance fit between the end of the limit spring 3 and the limit sleeve 4. The outer diameter of the pressure regulating spring 2 is smaller than the inner diameter of the limit spring 3, and the pressure regulating spring 2 and the limit spring 3 never contact each other.
[0026] In some embodiments, a stepped ring 6 is arranged at the end of the spool 1. The ends of the pressure regulating spring 2 and the limit spring 3 are both matched with the stepped ring 6. Among them, the stepped ring 6 is arranged to install the pressure regulating spring 2 and the limit spring 3, play a role in fixing the pressure regulating spring 2 and the limit spring 3, and at the same time will not damage the spool 1.
[0027] In some embodiments, a first limiting hole 7 is provided inside the end of the limiting sleeve 4, and the end of the limiting spring 3 is arranged inside the first limiting hole 7 and is matched with the first limiting hole 7. A second limiting hole 8 is provided on the end of the adjusting rod 5, and the end of the pressure regulating spring 2 is arranged inside the second limiting hole 8 and is matched with the second limiting hole 8. Among them, the first limiting hole 7 is provided for installing the end of the limiting spring 3, and the second limiting hole 8 is provided for installing the end of the pressure regulating spring 2, so as to prevent the unstable situation of the ends of the limiting spring 3 and the pressure regulating spring 2, and prevent the interference between the limiting spring 3 and the pressure regulating spring 2 during operation.
[0028] In some embodiments, the length of the pressure regulating spring 2 is greater than the length of the limiting spring 3. Among them, setting the length of the pressure regulating spring 2 longer facilitates the adjustment of the adjusting rod 5. If the pressure regulating spring 2 is set shorter, the end of the adjusting rod 5 will extend into the limiting spring 3, which is likely to cause interference between the limiting spring 3 and the adjusting rod 5.
[0029] In some embodiments, the valve body assembly includes a valve body 9 and a valve seat 10. The valve seat 10 is hermetically and fixedly arranged on the valve body 9. An input channel 11 matched with the valve core 1 is provided on the valve seat 10, an output channel 12 matched with the valve core 1 is provided on the valve body 9, the valve core 1 is hermetically and slidably arranged inside the valve body 9, and the limiting sleeve 4 is fixedly arranged on the valve body 9. Among them, the valve body 9 and the valve seat 10 are prior arts. A sealing ring is provided between the valve body 9 and the valve seat 10, and a sealing ring is provided between the outer wall of the valve core 1 and the inner wall of the valve body 9. The input channel 11 is coaxially arranged with the valve core 1. The medium enters from the input channel 11, then pushes the valve core 1 to compress the pressure regulating spring 2. After there is a gap between the valve core 1 and the valve seat 10, the medium is discharged from the output channel 12.
[0030] In some embodiments, the outer wall of the limiting sleeve 4 and the inner wall of the valve body 9 are connected by threads, and a locking ring 13 is provided on the outer wall of the limiting sleeve 4. Among them, the limiting sleeve 4 and the valve body 9 are connected together by threads. When connected by threads, the limiting sleeve 4 is fixed on the valve body 9 through the action of the locking ring 13 to prevent the limiting sleeve 4 from falling off the valve body 9.
[0031] In some embodiments, a through ventilation hole 14 is provided on the adjusting rod 5. Among them, the ventilation hole 14 is provided to make the valve core 1 communicate with the outside world, preventing the formation of a sealed cavity between the valve body 9, the valve core 1, the limiting sleeve 4 and the adjusting rod 5. In this way, when the valve core 1 works, there is not only the elastic force of the pressure regulating spring 2, but also the pressure of the sealed cavity, which increases the pressure when the valve core 1 moves and even fails to play the role of overflow.
[0032] In some embodiments, there is a clearance fit between the end of the limit spring 3 and the bottom of the first limit hole 7. Among them, only after the pressure regulating spring 2 is removed, when the spool 1 moves backward and acts on the limit spring 3, the limit spring 3 will contact the bottom of the first limit hole 7. After the pressure regulating spring 2 is installed, the limit spring 3 will not be compressed, there is no elastic force, and it will not affect the operation of the overflow valve. Therefore, after the pressure regulating spring 2 is installed, there is a clearance fit between the end of the limit spring 3 and the bottom of the first limit hole 7.
[0033] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0034] In the present invention, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "fixed", "hinged", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0035] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in related fields. And the changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.
Claims
1. A relief valve for safely and conveniently replacing a pressure regulating spring, characterized in that: The valve body assembly comprises a valve core (1), a pressure regulating spring (2), a limit spring (3), a limit sleeve (4), an adjusting rod (5) and a valve body assembly, wherein the valve core (1) is slidably arranged in the valve body assembly and one end thereof is respectively matched with one end of the pressure regulating spring (2) and the limit spring (3), one end of the limit spring (3) is matched with the limit sleeve (4), the pressure regulating spring (2) is arranged in the limit spring (3) and the other end thereof is matched with the adjusting rod (5), the outer wall of the adjusting rod (5) is threadedly matched with the inner wall of one end of the limit sleeve (4), and the other end of the limit sleeve (4) is fixedly connected to the valve body assembly.
2. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1, characterized in that: A step ring (6) is provided on the end of the valve core (1), and the ends of the pressure regulating spring (2) and the limit spring (3) are both matched with the step ring (6).
3. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: A first limiting hole (7) is arranged in the end of the limiting sleeve (4), and the end of the limiting spring (3) is arranged in the first limiting hole (7) and cooperates with the first limiting hole (7).
4. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: A second limiting hole (8) is provided on the end of the adjusting rod (5), and the end of the pressure regulating spring (2) is arranged in the second limiting hole (8) and cooperates with the second limiting hole (8).
5. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: The valve core (1), the pressure regulating spring (2) and the limit spring (3) are coaxially arranged.
6. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: The length of the pressure regulating spring (2) is greater than the length of the limit spring (3).
7. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: The valve body assembly comprises a valve body (9) and a valve seat (10); the valve seat (10) is sealingly fixedly arranged on the valve body (9); the valve seat (10) is provided with an input channel (11) cooperating with the valve core (1); the valve body (9) is provided with an output channel (12) cooperating with the valve core (1); the valve core (1) is sealingly slidably arranged in the valve body (9); and the limit sleeve (4) is fixedly arranged on the valve body (9).
8. The overflow valve for safely and conveniently replacing a pressure regulating spring according to claim 7, characterized in that: The outer wall of the limiting sleeve (4) is connected to the inner wall of the valve body (9) by means of threads, and a locking ring (13) is provided on the outer wall of the limiting sleeve (4).
9. A relief valve for safely and conveniently replacing a pressure regulating spring according to claim 1 or 2, characterized in that: The adjusting rod (5) is provided with a penetrating ventilation channel (14).
10. The overflow valve for safely and conveniently replacing a pressure regulating spring according to claim 3, characterized in that: There is a clearance fit between the end of the limit spring (3) and the bottom of the first limit hole (7).