Safety valve

Abstract

The utility model discloses a safety valve which comprises a valve body, a valve element, a connector and a spring. The valve body and the connector are provided with an air inlet hole and an air outlet hole respectively, the valve body and the valve element are connected to form an internal circulation path and jointly define a closed cavity, and the valve element is arranged in the cavity. A spring mounting hole is formed in the valve element, and a vent hole is formed in the side wall of the valve element and directly communicated with the blind hole. One end of the spring inserted into the blind hole abuts against the valve element, and the other end of the spring abuts against the connector. In the initial state, the valve element is tightly attached to the valve body under the action of the spring force, the air inlet hole is effectively sealed, and the sealing performance of a system is ensured. However, when the air pressure value at the air inlet exceeds the preset safety range, the strong air pressure pushes the valve element to generate displacement, at the moment, air enters the blind hole through the vent hole along the tiny gap between the valve element and the valve body and is finally released through the air outlet, and the effective pressure adjustment and safety protection functions are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a safety valve. Background Art

[0002] In pneumatic transmission, if the pressure in the pipeline is too high, there will be safety hazards such as leakage. Therefore, in order to achieve safety protection, a device is usually installed in the pipeline. When the pressure in the pipeline exceeds the safety value, the pipeline will be automatically depressurized to achieve safety protection. For example, a Chinese patent with application number 202321963334X, entitled "A pressure relief valve for protecting the safe operation of an electrode induction atomization powder making device", states that in the technical solution, when the pressure in the pipeline exceeds the preset safety threshold, the gas will automatically exert force to push the force plate to slide upward in a predetermined direction. In this process, the gas cleverly uses the gap formed after the force plate slides to flow out smoothly, and is eventually effectively discharged through the exhaust holes on both sides of the valve body, thereby ensuring that the purpose of safe pressure relief is achieved.

[0003] In the aforementioned technical solution, gas pressure relief is achieved through vent holes on both sides of the valve body, meaning that the exhausted gas is released directly into the surrounding environment. However, in some cases, if the gas in the gas circuit is not suitable for direct discharge to the external environment and needs to be guided to the next processing step through a specific pipeline, the currently used pressure relief valve cannot meet the safety protection requirements. In view of this existing technical problem, a new safety valve needs to be designed. Utility Model Content

[0004] The primary objective of this utility model is to address a key issue in the current technology: conventional pressure relief valves release gas directly into the surrounding environment, which is unsuitable for certain working gas path environments due to their unsuitable nature. To address this, we have innovatively proposed a new safety valve design, the details of which will be discussed in detail later.

[0005] A safety valve comprises a valve body, a joint, a valve core and a spring, wherein the valve body is provided with an air inlet, and the joint is provided with an air outlet; the valve body is connected to the joint, a cavity is formed between the air inlet and the air outlet, and the valve core is arranged in the cavity; a spring mounting hole is provided on the valve core, and a vent hole is opened on the side wall of the valve core, and the vent hole is communicated with the spring mounting hole; the spring is inserted into the spring mounting hole, and one end of the spring abuts against the valve core and the other end abuts against the joint.

[0006] In the above technical implementation, the valve body is securely connected to the air flow system, while the connector is connected to the outlet air flow. When the air pressure in the air flow is below the safety valve's set opening pressure threshold (i.e., within the spring's elastic force), the valve core and valve body remain tightly closed, ensuring smooth operation of the entire air flow system. Conversely, if the air pressure in the air flow exceeds this safety threshold—specifically, if the air pressure exceeds the spring's elastic force—the gas in the air flow generates sufficient force to push the valve core along the inner wall of the cavity. During this process, the gas first passes through the small gap between the valve core and the valve body, then flows through the vent holes in the valve core and further into the spring mounting hole, ultimately being directed through the connector to the outlet air flow, achieving effective pressure relief. When the air flow pressure drops below the safety valve's permitted opening pressure, the spring returns to its original position, driving the valve core back toward the air inlet until the spring force tightly closes the air inlet, at which point the air flow system resumes normal operation.

[0007] Preferably, the valve core is constructed with a blind sealing hole at one end adjacent to the air inlet, within which a sealing gasket is carefully positioned to ensure sealing performance. Furthermore, the air inlet is designed as a stepped hole, with a boss structure positioned on the stepped surface of the stepped hole. When the safety valve is in the closed state, the sealing gasket precisely abuts the boss, achieving an efficient sealing effect.

[0008] Preferably, the sealing gasket is made of rubber or silicone. Compared to metal, rubber and silicone are softer, allowing them to elastically deform under external forces, thereby achieving a tighter fit with the boss and significantly improving the sealing effect. Furthermore, once the external force is removed, both materials can quickly return to their original shape, ensuring long-term and stable sealing performance.

[0009] Preferably, the valve core includes a sliding end and an air inlet end, and the air inlet end is arranged in the cavity near the air inlet and slides in the cavity, and the air inlet end cannot slide with the cavity, that is, the diameter of the air inlet end is smaller than the sliding end; the spring mounting hole is a stepped hole, one end of the spring abuts against the stepped surface of the stepped hole, and the other end abuts against the joint; the vent hole is arranged on the air inlet end and is the same as the spring mounting hole.

[0010] Preferably, adjustment washers are provided at both ends of the spring. When the opening pressure of the safety valve needs to be adjusted, this can be achieved by increasing or decreasing the number of adjustment washers. Specifically, to increase the opening pressure, the number of adjustment washers should be increased; conversely, to decrease the opening pressure, the number of adjustment washers should be decreased.

[0011] Preferably, a first sealing ring is provided at the connection between the valve body and the joint to ensure sealing performance. In addition, in order to make the safety valve and the gas path more sealed, a second sealing ring specially used for sealing is provided on the valve.

[0012] Preferably, the valve body and the joint are rotationally connected.

[0013] Preferably, the valve body is sleeved onto the connector, a snap-fit ​​groove is defined on the valve body, and a snap-fit ​​groove is defined on the outer side of the connector; the snap-fit ​​groove and the snap-fit ​​groove are engaged by a retaining spring. During installation, the valve body and connector are sleeved together, with the snap-fit ​​groove and the snap-fit ​​groove at the same height; the retaining spring contracts inward under the influence of elastic force, locking the snap-fit ​​groove and the snap-fit ​​groove together, thereby preventing the snap-fit ​​groove and the snap-fit ​​groove from being separated axially.

[0014] Preferably, the card groove is an annular groove; the card connection groove includes an annular groove, a boss and a card interface, and the card interface and the boss are arranged inside the annular groove in an interval manner.

[0015] Preferably, three snap-in slots are provided.

[0016] Preferably, the clamping spring is recessed inwardly at the clamping interface, which can more effectively clamp a larger area of ​​the clamping slot. In this case, the clamping spring can better be clamped into the slots of the clamping slot and the clamping slot at the same time.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this utility model, the decompressed gas is first centrally transmitted through the valve body and then accurately and effectively guided into the connector, ensuring seamless connection to the subsequent piping system, thereby achieving complete and efficient gas transmission. This design strictly prevents the possibility of decompressed gas being directly released into the surrounding environment, effectively preventing any possible adverse effects on the surrounding environment.

[0019] In existing technologies, valve body air outlet designs generally adopt a fixed layout, which to some extent limits the diversity and wide range of its applications. However, in the utility model, the valve body and the joint are connected in a rotatable manner. This design gives the valve body the flexibility to adjust the air outlet angle, thereby significantly improving the valve body's adaptability and functional versatility. This improvement enables the valve body to more effectively handle a wider range of complex and changing working scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of Example 3;

[0022] Figure 3 yes Figure 2 AA sectional view;

[0023] Figure 4 yes Figure 3 Stereoscopic image.

[0024] The following are the descriptions of the reference numerals:

[0025] Valve body, 11. Air inlet, 12. Sealing platform, 13. First sealing ring, 14. Second sealing ring, 15. Card groove, 151. Ring groove, 152. Boss, 153 Card interface, 2. Connector, 21. Air outlet, 22. Card groove, 3. Valve core, 31. Spring mounting hole, 32. Vent hole, 33. Sealing blind hole, 34. Sealing gasket, 35. Sliding end, 36. Air inlet, 4. Spring, 41. Adjusting gasket, 5. Circlip. DETAILED DESCRIPTION

[0026] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] The technical solution of the present invention is further described below with reference to specific embodiments and accompanying drawings: Example 1

[0029] like Figure 1As shown, a safety valve comprises a valve body 1, a connector 2, a valve core 3, and a spring 4. The valve body 1 is provided with an air inlet 11, while the connector 2 is provided with an air outlet 21. The valve body 1 is connected to the connector 2, thereby forming a cavity between the air inlet 11 and the air outlet 21. The valve core 3 is placed inside the cavity. The valve core 3 is provided with a spring mounting hole 31, and a vent hole 32 is also provided on the side wall of the valve core 3. The vent hole 32 and the spring mounting hole 31 remain unobstructed. The spring 4 is inserted into the spring mounting hole 31, with one end of the spring 4 tightly abutting against the inside of the valve core 3, and the other end firmly abutting against the connector 2.

[0030] The valve body 1 is firmly installed in the air path system and is tightly connected to the connector 2 to achieve connection to the outlet air path. When the air pressure inside the air path does not reach the preset opening pressure threshold of the safety valve, that is, the pressure value required for the elastic deformation of the spring 4, the valve core 3 and the valve body 1 maintain a tight closure state to ensure the smooth operation of the air path system. On the contrary, if the air pressure in the air path rises to exceed this safety threshold, that is, the air pressure exceeds the elastic force limit of the spring 4, the gas in the air path will have sufficient thrust to drive the valve core 3 to slide along the inner wall of the cavity. In this process, the gas first penetrates the tiny gap between the valve core 3 and the valve body 1, and then flows into the spring mounting hole 31 through the carefully designed vent hole on the valve core 1, and is finally guided to the outlet air path through the connector 2, thereby realizing an effective pressure release mechanism. Once the pressure in the gas circuit drops below the safe opening pressure specified by the safety valve, the spring 4 will naturally return to its original state, pushing the valve core 3 back toward the air inlet until the valve core 3 tightly closes the air inlet under the action of the spring force, indicating that the gas circuit system has returned to normal operation.

[0031] The beneficial effects of this embodiment are: the depressurized gas is centrally transmitted through the valve body, effectively guided into the joint, and then directly transmitted to the subsequent pipeline, thereby ensuring that the gas is not directly released into the surrounding environment, and avoiding the impact of the depressurized gas on the surrounding environment. Example 2

[0032] like Figure 1 FIG. 1 shows another embodiment of a safety valve. This embodiment differs from the first embodiment in that a sealing blind hole 33 is provided at the end of the valve core 3 near the air inlet 11, into which a rubber sealing gasket 34 is embedded. A sealing platform 12 is mounted on the stepped surface of the stepped hole of the air inlet 11. When the safety valve is in the closed state, the sealing gasket 34 is in close contact with the sealing platform 12. Because rubber easily deforms under external forces, the sealing platform 12 can be embedded in the sealing gasket 33, thereby enhancing the airtightness between the valve core 3 and the valve body 1.

[0033] Furthermore, a first sealing ring 13 is disposed between the valve body 1 and the connector 4, and the valve body 1 itself is additionally equipped with a second sealing ring 14 designed specifically for air path sealing. Both the first sealing ring 13 and the second sealing ring 14 are made of rubber, thereby ensuring optimal airtightness between the safety valve and the air path, the valve body, and the connector.

[0034] The valve core 3 consists of a sliding end 35 and an air inlet end 36. The sliding end 35 is slidably connected to the cavity formed by the valve body 1 and the connector 2, and the air inlet end is located near the air inlet 11. The spring mounting hole 31 is provided on the side of the sliding end 35 and is designed as a stepped hole. The spring 4 is inserted into the spring mounting hole 31, with one end of the spring 4 resting firmly on the stepped surface of the stepped hole and the other end resting firmly on the connector 2. In addition, the air vent 21 is provided on the air inlet end 36 and communicates with the spring mounting hole 31.

[0035] Furthermore, adjustment washers 41 are provided at both ends of the spring 4 for adjusting the spring pressure. Adjusting the spring 4 pressure can be achieved by increasing or decreasing the number of adjustment washers 41. Specifically, to increase the force exerted by the spring 4, the number of adjustment washers 41 should be increased; conversely, to decrease the force exerted by the spring 4, the number of adjustment washers 41 should be decreased.

[0036] Furthermore, the air inlet 11 and the air outlet 21 are both stepped holes.

[0037] The remaining technical features and working principles are consistent with those of Example 1.

[0038] The beneficial effects of this embodiment are as follows: by providing a sealing blind hole at the air inlet, supplemented by a sealing gasket 34, which works in conjunction with the sealing platform 12, the sealing effect of the air inlet 11 is further enhanced to ensure that the sealing performance of the air inlet is more superior; in order to meet the different needs of the air circuit, the adjustment gaskets at both ends of the spring 4 can be increased or decreased to achieve adaptability to air circuits with different air pressures, thereby expanding its application range. Example 3

[0039] like Figure 2-4 As shown, a safety valve is provided, which is based on Example 1 and differs from Example 1 mainly in that the valve body 1 and the joint 2 are rotationally connected; more specifically, the valve body 1 is sleeved on the joint 2, and at this time the valve body 1 and the joint 2 are in a coaxial state and can rotate with each other, but in this state the valve body 1 and the joint 2 can be displaced with each other in the axial direction, so a clamping groove 15 is provided on the valve body 1, and a clamping groove 22 is provided on the outside of the joint 2; the clamping groove 15 and the clamping groove 22 are clamped by a retaining spring 5, and the clamping groove 15 and the clamping groove 22 are clamped at the same time by the retaining spring 5 to avoid axial displacement between the valve body 1 and the joint 2.

[0040] Furthermore, the clamping groove 22 is designed as an annular groove; the connecting groove 15 comprises an annular groove 151, a boss 152, and a clamping interface 153, wherein the clamping interface 153 and the boss 152 are arranged in an alternating pattern within the annular groove 151. Specifically, the number of clamping interfaces 153 is precisely set to three, while there are two bosses 152. This layout design ensures that, except for the opening area directly corresponding to the retaining spring 5, the rest of the connecting groove 15 can seamlessly connect with the connecting groove 22, thereby maximizing the contact area between the retaining spring 5 and the connecting groove, thereby making the connection between the valve body 1 and the connector 2 more stable and reliable. The boss 152 prevents the retaining spring 5 from being affected by the spring force and completely retracting into the connecting groove 22, thereby locking the connecting groove 15 while also providing support for the connecting groove 22.

[0041] Furthermore, the retaining spring 5 is designed to be recessed inward at the card interface 153. This design enables the retaining spring 5 to more effectively clamp a larger area of ​​the card slot 22 while being located at the card interface 153, thereby significantly enhancing the stability between the valve body 1 and the connector 2 in the axial direction.

[0042] The remaining technical features and working principles are consistent with those of Example 1.

[0043] Beneficial effects of this embodiment: In this embodiment, the rotatable connection between the valve body and the joint gives the valve body the flexibility to adjust the angle of the air outlet, thereby greatly improving the adaptability and functional diversity of the valve body, allowing the valve body to more effectively cope with a wider range of complex and changeable working scenarios.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A safety valve, characterized in that: The invention comprises a valve body (1), a connector (2), a valve core (3) and a spring (4), wherein the valve body (1) is provided with an air inlet (11), and the connector (2) is provided with an air outlet (21); the valve body (1) is connected to the connector (2), the air inlet (11) and the air outlet (21) form a cavity, and the valve core (3) is arranged in the cavity and slides; the valve core (3) is provided with a spring mounting hole (31), and a vent hole (32) is opened on the side wall of the valve core (3), and the vent hole (32) is communicated with the spring mounting hole (31); the spring (4) is inserted into the spring mounting hole (31), and one end of the spring (4) abuts against the valve core (3) and the other end abuts against the connector (2).

2. A safety valve according to claim 1, characterized in that: A sealing blind hole (33) is provided at one end of the valve core (3) close to the air inlet (11), and a sealing gasket (34) is provided in the sealing blind hole (33); the air inlet (11) is a stepped hole, and a sealing platform (12) is provided on the stepped surface of the stepped hole; the sealing gasket (34) abuts against the sealing platform (12) when the safety valve is in a closed state.

3. A safety valve according to claim 1, characterized in that: The valve core (3) includes a sliding end (35) and an air inlet end (36), and the air inlet end (36) is arranged in the cavity at a position close to the air inlet (11); the spring mounting hole (31) is a stepped hole, one end of the spring (4) abuts against the stepped surface of the stepped hole, and the other end abuts against the joint (2); the vent hole (32) is arranged on the air inlet end (36) and communicates with the spring mounting hole (31).

4. A safety valve according to claim 3, characterized in that: Adjustment washers (41) are provided at both ends of the spring (4).

5. A safety valve according to claim 1, characterized in that: A first sealing ring (13) is provided between the valve body (1) and the joint (2), and a second sealing ring (14) for sealing the valve body (1) is also provided on the valve body (1).

6. A safety valve according to claim 1, characterized in that: The air inlet (11) and the air outlet (21) are both stepped holes.

7. A safety valve according to claim 1, characterized in that: The valve body (1) and the joint (2) are rotationally connected.

8. A safety valve according to claim 7, characterized in that: The connector (2) is sleeved on the valve body (1); a clamping groove (15) is provided on the valve body (1); a clamping groove (22) is provided on the outer side of the connector (2); the clamping groove (15) and the clamping groove (22) are clamped together by a clamping spring (5).

9. A safety valve according to claim 8, characterized in that: The card slot (22) is an annular slot; the card connection slot (15) comprises an annular slot (151), a boss (152) and a card interface (153); the card interface (153) and the boss (152) are arranged inside the annular slot (151) in an interval arrangement.

10. A safety valve according to claim 8, characterized in that: The clamping spring (5) is recessed inwardly at the clamping interface (153).

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