Safety valve

Abstract

The utility model relates to a safety valve. A safety valve comprises a valve body, a water inlet is formed in the lower end of the valve body, and a pressure relief opening is formed in the right end of the valve body. A hollow diaphragm is arranged in the valve body, a piston is arranged in the diaphragm, a spring is arranged in the piston, a spring support is arranged in the spring, and a valve bonnet is arranged at the upper end of the spring support. Under the action of the spring, the diaphragm can move up and down, so that the water inlet is closed and opened. An annular boss is arranged at the bottom in the valve body, and the outer wall of the upper end of the annular boss is designed to be an annular conical face with the small upper portion and the large lower portion. According to the structure, when the safety valve is opened, the gap between the annular boss and the diaphragm can be increased, and the flow of water flowing through is remarkably increased, so that the pressure relief capacity of the safety valve is improved, and the safety of a pipeline is guaranteed. The safety valve is optimized in structure and reliable in performance, and solves the problems that in the prior art, pressure relief performance is insufficient, installation and adjustment are inconvenient, and sealing performance is poor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety valve, in particular to a safety valve of pipeline system. BACKGROUND

[0002] Safety valve is the safety protection device of closed system such as heating, heating, refrigeration, is widely used in heating, refrigeration and domestic water etc. Field. Its main function is when system pressure exceeds the set value, through the automatic opening pressure relief mode, protects the safety of pipeline and equipment, and then automatically closes when pressure restores normal. However, the safety valve in prior art has the following problems and deficiencies: limited pressure relief performance: when the conventional safety valve opens pressure relief, the internal structure design can cause the flow passage to be narrow, the flow of pressure relief passage is limited, and the pressure relief effect is affected. This design can not quickly and effectively reduce the system pressure in the high pressure scene, thereby threatening the system safety. Installation and adjustment are inconvenient: the existing safety valve usually adopts fixed connection, and the pressure relief direction thereof cannot be flexibly adjusted after installation. Because different equipment and scenes have different requirements for the pressure relief direction, this fixed structure brings limitations in actual use. In addition, the bonnet of the conventional safety valve lacks convenient installation design, and is easy to slide when adjusted using tools, affecting the operation efficiency. Insufficient sealing: the stability of the internal sealing assembly of part of the safety valve in use is poor, which can cause medium leakage and cannot meet the use demand of high requirement sealing environment. Therefore, in order to solve the above problems, it is necessary to provide a new type of safety valve, which has optimized structure and better performance, can improve the pressure relief efficiency, is convenient to install and adjust, and enhances the sealing property to adapt to more extensive application scenarios. SUMMARY

[0003] The utility model aims at providing a safety valve with optimized structure and reliable performance to solve the problems of insufficient pressure relief performance, inconvenient installation and adjustment and poor sealing in prior art. Through the improvement of the internal structure and components of the safety valve, the utility model can significantly improve the pressure relief efficiency, enhance the sealing effect and simplify the installation and maintenance process, thereby better adapting to the demand of various application scenarios.

[0004] The specific technical scheme of the utility model is as follows: a safety valve, comprising a valve body, the lower end of the valve body is provided with a water inlet, and the right end is provided with a pressure relief port. A hollow diaphragm is arranged in the valve body, a piston is arranged in the diaphragm, a spring is arranged in the piston, a spring support is arranged in the spring, and a bonnet is arranged at the upper end of the spring support. Through the action of the spring, the diaphragm can move up and down, thereby realizing the closing and opening of the water inlet.

[0005] Further, the inner bottom of the valve body is provided with an annular boss, and the outer wall of the upper end of the annular boss is designed as an annular taper surface which is small at the upper end and large at the lower end. When the safety valve is opened, the gap between the annular boss and the diaphragm can be increased, the flow rate of water flow can be significantly improved, the pressure relief capacity of the safety valve can be improved, and the safety of the pipeline can be ensured.

[0006] Further, the diaphragm is a hollow diaphragm, the lower end of the diaphragm abuts against the annular boss, and the upper end of the diaphragm is inverted in the inner part of the valve body. Through close contact between the lower end of the piston and the diaphragm and vertical support of the diaphragm by the spring support, the sealing performance is further enhanced, and leakage of the medium in a non-pressure relief state is effectively prevented.

[0007] Further, the valve cap is provided with a knurled structure, the friction is increased, and inconvenience caused by sliding during installation or use is avoided. The user can directly rotate the valve cap by hand without the aid of tools, and the operation convenience is further improved.

[0008] Further, the lower end of the valve body is provided with a nut, and the nut and the protruding end of the valve body are provided with a snap spring. The nut adopts a loose nut structure, the pressure relief direction of the safety valve can be flexibly adjusted according to actual needs, various installation environments can be adapted, and the use flexibility is enhanced.

[0009] Further, the upper end of the piston is provided with a rib position which can be installed into the clamping groove of the spring support, so that the fixed connection between the piston and the spring support is ensured, and loosening is prevented.

[0010] Further, the lower end of the spring support abuts against the diaphragm, the transverse movement of the diaphragm is further limited, and stable operation of the diaphragm in a working state is ensured.

[0011] Through the above technical scheme, the safety valve of the utility model not only significantly improves the pressure relief performance and the sealing performance, but also greatly simplifies the installation and maintenance operation, and can better meet the needs in different application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a cross-sectional structure schematic view of a specific embodiment of the utility model.

[0013] Figure 2 It is a structure schematic view of a specific embodiment A of the utility model after amplification

[0014] Figure 3 It is a shape structure schematic view of a specific embodiment of the utility model

[0015] BRIEF DESCRIPTION OF DRAWINGS 1, valve cap, 2, piston, 3, spring support, 4, spring, 5, diaphragm, 6, valve body, 7, snap spring, 8, loose nut, 9, water inlet, 10, pressure relief port, 11, annular boss, 12, annular taper surface. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be further explained and described in combination with specific embodiments.

[0017] A safety valve, comprising a valve body 6, a water inlet 9 is arranged at the lower end of the valve body 6, a pressure relief port 10 is arranged at the right end of the valve body 6, a hollow diaphragm 5 is arranged in the valve body 6, a piston 2 is arranged in the diaphragm 5, a spring 4 is arranged in the piston 2, a spring support 3 is arranged in the spring 4, and a valve cap 1 is arranged on the spring support 3. The diaphragm 5 can move up and down by the spring 4 to close and open the water inlet 9 of the valve body 6. An annular boss 11 for abutting the lower end of the diaphragm 5 is arranged on the inner bottom of the valve body 6, and an annular taper surface 12 with a small upper end and a large lower end is arranged on the outer wall of the upper end of the annular boss 11. A nut 8 is arranged at the lower end of the valve body 6, a snap spring 7 is arranged between the nut 8 and the protruding end of the valve body 6, and the nut 8 is a loose nut, which can conveniently adjust the pressure relief direction of the safety valve.

[0018] The valve cap 1 is provided with knurling to prevent slipping during installation and use, the safety valve can be checked for normal opening by rotating the valve cap 1, the pressure relief port 10 is in an open state by manually rotating the valve cap 1 to discharge the medium, and no medium should be discharged from the pressure relief port 10 after the valve cap 1 is loosened.

[0019] The annular boss 11 for abutting the lower end of the diaphragm 5 is arranged on the inner bottom of the valve body 6, and the annular taper surface 12 with a small upper end and a large lower end is arranged on the outer wall of the upper end of the annular boss 11. This structure can increase the gap between the annular boss 11 and the diaphragm 5 when the safety valve is opened, that is, the flow rate when the water flows through the gap between the diaphragm 5 and the annular boss 11 can be increased, and the pressure relief capacity of the safety valve can be improved, that is, the protection effect of the safety valve on the pipeline can be improved.

[0020] The diaphragm 5 is a hollow diaphragm, the lower end of the diaphragm 5 abuts against the annular boss 11, the annular taper surface 12 with a small upper end and a large lower end is arranged on the outer wall of the upper end of the annular boss 11, and the upper end of the diaphragm 5 is inverted and buckled in the valve body 6.

[0021] The lower end of the piston 2 abuts against the diaphragm 5, so that the diaphragm 5 has good sealing performance. The upper end of the piston 2 is provided with a rib position and is installed on the clamping groove of the spring support 3.

[0022] The lower end of the spring support 3 abuts against the diaphragm 5, so that the diaphragm 5 cannot move transversely. The upper end of the spring support 3 has a clamping groove, and the rib position at the upper end of the piston 2 is fixed together, so as to prevent loosening.

[0023] The lower end of the valve body 6 is provided with the nut 8, and the snap spring 7 is arranged between the nut 8 and the protruding end of the valve body 6.

[0024] The nut 8 is a loose nut, which can conveniently adjust the relief direction of the safety valve.

[0025] To sum up, the utility model discloses a ring boss and the ring taper of big on the small, optimize the flow passage design, increase the clearance of the pressure relief passage when the safety valve opens, improve the discharge flow and efficiency, introduce the loose nut structure, make the relief direction of the safety valve can be flexibly adjusted according to the demand, adapt to the diversified installation environment, increase the knurl design on the bonnet, avoid the sliding problem, and the user can directly manually operate, need not extra tool, improve the use convenience, optimize the cooperation structure of the piston, spring support and diaphragm, enhance the sealing performance, ensure that medium does not leak in the non relief state.

Claims

1. A relief valve comprising a valve body, characterised in that: The lower end of the valve body is provided with a water inlet, the right end is provided with a pressure relief port, a hollow diaphragm is arranged in the valve body, a piston is arranged in the diaphragm, a spring is arranged in the piston, a spring support is arranged in the spring, a valve cap is arranged at the upper end of the spring support, the diaphragm can move up and down through the action of the spring, so as to realize the closing and opening of the water inlet, and the inner bottom of the valve body is provided with an annular boss, and the outer wall of the upper end of the annular boss is designed as an annular taper surface which is small at the upper end and large at the lower end.

2. A relief valve as claimed in claim 1, characterised in that: The diaphragm is a hollow diaphragm, the lower end of the diaphragm abuts against the annular boss, and the upper end of the diaphragm is invertedly buckled in the valve body.

3. A relief valve as claimed in claim 1, wherein: A knurled structure is arranged on the valve cap, so as to increase the friction.

4. A relief valve as claimed in claim 1, wherein: The lower end of the valve body is provided with a nut, and a snap spring is arranged between the nut and the protruding end of the valve body.

5. A relief valve as claimed in claim 4, wherein: The nut adopts a loose nut structure, and the pressure relief direction of the safety valve can be flexibly adjusted according to actual needs.

6. A relief valve as claimed in claim 5, characterised in that: The upper end of the piston is provided with a rib position which can be installed into the clamping groove of the spring support, so as to ensure the fixed connection between the piston and the spring support and prevent loosening.

7. A relief valve as claimed in claim 6 wherein: The lower end of the spring support abuts against the diaphragm.

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