CN223578975U - Safety valve - Google Patents

Abstract

This utility model relates to a safety valve. A safety valve includes a valve body with an inlet at the lower end and a pressure relief port at the right end. A hollow diaphragm is disposed within the valve body, a piston is disposed within the diaphragm, a spring is disposed within the piston, a spring support is disposed within the spring, and a valve cap is disposed at the upper end of the spring support. Through the action of the spring, the diaphragm can move up and down, thereby closing and opening the inlet. An annular boss is disposed at the bottom of the valve body, and the outer wall of the upper end of the annular boss is designed as an annular conical surface that is smaller at the top and larger at the bottom. This structure increases the gap between the annular boss and the diaphragm when the safety valve is open, significantly increasing the flow rate of water, thereby improving the pressure relief capacity of the safety valve and ensuring the safety of the pipeline. The purpose of this utility model is to provide a structurally optimized and reliable safety valve to solve the problems of insufficient pressure relief performance, inconvenient installation and adjustment, and poor sealing in existing technologies.

Description

Safety valve

Technical Field

The utility model relates to a safety valve, in particular to a safety valve of a pipeline system.

Background

The safety valve is a safety protection device of a closed system for heating, refrigerating and the like, and is widely applied to the fields of heating, refrigerating, domestic water and the like. The main function of the system is to protect the safety of the pipeline and the equipment by automatically opening and releasing pressure when the system pressure exceeds a set value, and automatically closing the system after the pressure is recovered to be normal. However, the safety valve in the prior art has the problems and disadvantages that the pressure release performance is limited, the internal structural design can lead to narrow flow channels when the traditional safety valve is opened for pressure release, the flow of the pressure release channel is limited, and the pressure release effect is influenced. Such designs may not be able to effectively reduce system pressure quickly in high pressure scenarios, thereby compromising system safety. The installation and adjustment are inconvenient, the existing safety valve is usually fixedly connected, and the pressure relief direction of the existing safety valve cannot be flexibly adjusted after the installation. This fixed structure has limitations in practical use due to the different requirements of different devices and scenarios for the pressure relief direction. In addition, traditional relief valve bonnet lacks convenient installation design, and easy slip influences operating efficiency when using the instrument to adjust. The tightness is insufficient, namely, when the part of safety valve is in use, the stability of the internal sealing assembly is poor, the medium can be leaked, and the use requirement of a high-requirement sealing environment can not be met. Therefore, in order to solve the above-mentioned problems, it is necessary to provide a novel safety valve, which has an optimized structure and better performance, can improve the pressure release efficiency, is convenient to install and adjust, and can enhance the sealing performance so as to adapt to a wider application scenario.

Disclosure of utility model

The utility model aims to provide a safety valve with optimized structure and reliable performance, which solves the problems of insufficient pressure release performance, inconvenient installation and adjustment, poor sealing performance and the like in the prior art. Through improvement of the internal structure and components of the safety valve, the pressure relief efficiency can be remarkably improved, the sealing effect is enhanced, and the installation and maintenance processes are simplified, so that the pressure relief valve is better suitable for the requirements of various application scenes.

The safety valve comprises a valve body, wherein the lower end of the valve body is provided with a water inlet, and the right end of the valve body is provided with a pressure relief opening. The valve body is internally provided with a hollow diaphragm, 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 cap is arranged at the upper end of the spring support. The diaphragm can move up and down under the action of the spring, so that the water inlet is turned off and turned on.

Further, an annular boss is arranged at the inner bottom of the valve body, and the outer wall of the upper end of the annular boss is designed into an annular conical surface with a small upper part and a large lower part. When the safety valve is opened, the gap between the annular boss and the diaphragm can be increased, the flow rate of water flowing through is obviously improved, the pressure release capacity of the safety valve is improved, and the safety of a pipeline is guaranteed.

Further, the diaphragm is a hollow diaphragm, the lower end of the diaphragm is propped against the annular boss, and the upper end of the diaphragm is reversely buckled inside the valve body. The sealing performance is further enhanced through the close contact between the lower end of the piston and the diaphragm and the vertical support of the spring support to the diaphragm, and the leakage of the medium in a non-pressure release state is effectively prevented.

Further, set up knurl structure on the valve cap, through increase frictional force, avoid the inconvenient operation that leads to because of sliding in installation or the use. The user can directly rotate the valve cap by hand without using tools, so that the operation convenience is further improved.

Further, a nut is arranged at the lower end of the valve body, and a clamp spring is arranged between the nut and the extending end of the valve body. The nut adopts a loose joint nut structure, so that the pressure relief direction of the safety valve can be flexibly adjusted according to actual requirements, the nut is suitable for various installation environments, and the use flexibility is enhanced.

Further, the upper end of the piston is provided with a rib, and the rib can be installed in a clamping groove of the spring support, so that the fixed connection between the piston and the spring support is ensured, and looseness is prevented.

Furthermore, the lower end of the spring support is abutted against the diaphragm, so that the transverse movement of the diaphragm is further limited, and the diaphragm is ensured to stably run in a working state.

Through the technical scheme, the safety valve not only remarkably improves the pressure release performance and the sealing performance, but also greatly simplifies the installation and maintenance operations, and can better meet the requirements in different application scenes.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.

FIG. 2 is an enlarged schematic view of an embodiment A of the present utility model

FIG. 3 is a schematic view showing an exception structure according to an embodiment of the present utility model

The reference numerals indicate 1, a valve cap, 2, a piston, 3, a spring support, 4, a spring, 5, a diaphragm, 6, a valve body, 7, a clamp spring, 8, a loose joint nut, 9, a water inlet, 10, a pressure relief port, 11, an annular boss, 12 and an annular conical surface.

Detailed Description

The technical scheme of the utility model is further explained below by combining specific embodiments.

The utility model provides a relief valve, includes valve body 6, the lower extreme of valve body 6 is equipped with water inlet 9, the right-hand member of valve body 6 is equipped with pressure release mouth 10, be equipped with in the valve body 6 and be hollow diaphragm 5, be equipped with piston 2 in the diaphragm 5, be equipped with spring 4 in the piston 2, be equipped with spring support 3 in the spring 4, spring support 3 on be equipped with valve cap 1. The diaphragm 5 can move up and down through the spring 4 to turn off and turn on the water inlet 9 of the valve body 6. An annular boss 11 for propping against the lower end of the diaphragm 5 is arranged on the inner bottom of the valve body 6, and an annular conical surface 12 with a small upper part and a large lower part is arranged on the outer wall of the upper end of the annular boss 11. The lower extreme of valve body 6 is equipped with nut 8, be provided with jump ring 7 between the end that stretches out of nut 8 and valve body 6, nut 8 is the loose joint nut, can conveniently adjust relief valve pressure release direction.

The valve cap 1 is provided with knurling to prevent slipping in the installation and use process, the rotary valve cap 1 can be used for checking whether a safety valve is normally opened, the valve cap 1 is manually rotated to enable the pressure relief opening 10 to be in an opened state to discharge media, and no media is discharged from the pressure relief opening 10 after the valve cap 1 is loosened.

An annular boss 11 for propping against the lower end of the diaphragm 5 is arranged on the inner bottom of the valve body 6, and an annular conical surface 12 with a small upper part and a large lower part is arranged on the outer wall of the upper end of the annular boss 11. This structure can be when the relief valve is opened, can increase the clearance between annular boss 11 and the diaphragm 5, can increase the flow when rivers flow through the clearance between diaphragm 5 and the annular boss 11 promptly, and then can improve the pressure release ability of relief valve, can improve the protection effect of relief valve to the pipeline promptly.

The diaphragm 5 is a hollow diaphragm, the lower end of the diaphragm 5 props against the annular boss 11, an annular conical surface 12 with a small upper part and a large lower part is arranged on the outer wall of the upper end of the annular boss 11, and the upper end of the diaphragm 5 is reversely buckled inside the valve body 6.

The lower end of the piston 2 is abutted in 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 which is arranged on the clamping groove of the spring support 3.

The lower end of the spring support 3 is abutted against the diaphragm 5, so that the diaphragm 5 cannot move transversely. The upper end of the spring support 3 is provided with a clamping groove which is well fixed with the upper end rib position of the piston 2, thus preventing looseness.

The lower end of the valve body 6 is provided with a nut 8, and a clamp spring 7 is arranged between the nut 8 and the extending end of the valve body 6.

The nut 8 is a loose joint nut, so that the pressure relief direction of the safety valve can be conveniently adjusted.

In summary, the utility model optimizes the flow channel design by arranging the annular boss and the annular conical surface with the small upper part and the large lower part, increases the gap of the pressure relief channel when the safety valve is opened, improves the pressure relief flow and efficiency, introduces the loose joint nut structure, enables the pressure relief direction of the safety valve to be flexibly adjusted according to the requirements, adapts to diversified installation environments, adds the knurling design on the valve cap, avoids the sliding problem, enables a user to directly and manually operate without additional tools, improves the use convenience, optimizes the matching structure of the piston, the spring support and the diaphragm, enhances the sealing performance, and ensures that the medium cannot leak in a non-pressure relief state.

Claims (7)

1. A safety valve, comprising a valve body, characterized 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 provided inside the valve body, a piston is provided inside the diaphragm, a spring is provided inside the piston, a spring support is provided inside the spring, and a valve cap is provided at the upper end of the spring support. By the action of the spring, the diaphragm can move up and down, thereby closing and opening the water inlet. An annular boss is provided at the bottom of the valve body, and the outer wall of the upper end of the annular boss is designed as an annular conical surface that is smaller at the top and larger at the bottom. 2. A safety valve as described in claim 1, characterized in that: the diaphragm is a hollow diaphragm, the lower end of the diaphragm abuts against an annular protrusion, and the upper end of the diaphragm is inverted inside the valve body. 3. A safety valve as described in claim 1, characterized in that: the valve cap is provided with a knurled structure to increase friction. 4. A safety valve as described in claim 1, characterized in that: a nut is provided at the lower end of the valve body, and a retaining ring is provided between the nut and the extended end of the valve body. 5. A safety valve as described in claim 4, characterized in that: the nut adopts a swivel nut structure, which can flexibly adjust the pressure relief direction of the safety valve according to actual needs. 6. A safety valve as described in claim 5, characterized in that: a rib is provided at the upper end of the piston, which can be installed into the slot of the spring support to ensure a fixed connection between the piston and the spring support and prevent loosening. 7. A safety valve as described in claim 6, characterized in that: the lower end of the spring support abuts against the diaphragm.