Gas pressure control valve group for gas cylinder

Abstract

The utility model discloses a gas pressure control valve group for a gas cylinder, which comprises a one-way valve assembly, a shell, a pressure reducing valve assembly and a pressure release valve assembly, a gas cylinder connector is arranged at the lower end of the shell, a second filter element is arranged in the gas cylinder connector, and the pressure release valve assembly and the one-way valve assembly are installed on one side face of the shell in parallel. An outer port of the one-way valve assembly is arranged to be an inlet, the pressure reducing valve assembly is installed on the other side face of the shell and comprises a pressure reducing valve shell, a locking nut, a third spring, a piston, a sealing block, a pressure reducing valve and a pre-tightening spring, and the pressure reducing valve shell is in threaded connection with the valve set shell. The pre-tightening spring, the pressure reducing valve, the sealing block, the piston and the third spring are sequentially arranged in the pressure reducing valve shell, and the right end of the pressure reducing valve shell is connected with the locking nut; the control valve set is compact in structure, high in reliability, good in manufacturability, simple in installation mode, capable of achieving stepless adjustment of output pressure according to user requirements and wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control valves, in particular to a gas pressure control valve group for a gas cylinder. Background Art

[0002] Pressure control valve is the general term for valves that control pressure. In normal times, we all refer to valves that control pressure as pressure control valves. Pressure control valves are sometimes also referred to as pressure valves, which are mainly used to meet the force or torque requirements of the actuator.

[0003] The gas pressure control valve group is installed in the gas circuit system with long-term pressure. The interfaces between the components are prone to loosening and leaking in mechanical environments such as vibration, impact, acceleration, etc., causing pressure loss outside the mission, making fault troubleshooting difficult and maintenance time long. The existing gas circuit system is controlled by multiple valves, and the valves are connected by pipelines, which are prone to loosening and leaking. It is inconvenient to disassemble and repair each time, and it is also inconvenient to adjust the output pressure. In view of the above problems, a gas pressure control valve group for gas cylinders is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a gas pressure control valve group for gas cylinders. The control valve group has a compact structure, high reliability, good processability, simple installation method, and the output pressure can be steplessly adjusted according to user needs. It has a wide range of applications, and can filter high-pressure gas impurities in both inlet and outlet directions. It has a pressure gauge and a temperature and pressure sensor interface, monitors the gas cylinder pressure in real time, and has a manual high-pressure deflation function to meet maintenance needs, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas pressure control valve group for a gas cylinder, comprising a one-way valve assembly, a shell, a pressure reducing valve assembly and a pressure relief valve assembly, a gas cylinder interface is provided at the lower end of the shell, a filter element 2 is provided in the gas cylinder interface, the pressure relief valve assembly and the one-way valve assembly are parallelly mounted on one side surface of the shell, an outer port of the one-way valve assembly is arranged as an inlet, and the pressure reducing valve assembly is mounted on the other side surface of the shell, the pressure reducing valve assembly comprises a pressure reducing valve shell, a locking nut, a spring 3, a piston, a sealing block, a pressure reducing valve valve and a preload spring, the pressure reducing valve shell is threadedly connected to the valve group shell, the preload spring, the pressure reducing valve valve, the sealing block, the piston and the spring 3 are sequentially installed in the pressure reducing valve shell, the right end of the pressure reducing valve shell is threadedly connected to the locking nut, and an adjusting rod is threadedly connected to the center of the locking nut, the inner end of the adjusting rod is in conflict with the spring seat of the spring 3, and an outlet is provided on the pressure reducing valve shell.

[0006] Furthermore, the one-way valve assembly includes a one-way valve valve, a one-way valve housing and a spring 1. The left end of the one-way valve housing is threadedly connected to the valve group housing, the spring 1 and the one-way valve valve are arranged in the one-way valve housing, the right end of the one-way valve housing is threadedly connected to the inlet housing, a filter element 1 is arranged in the inlet housing, and the inlet is arranged at the outer end of the inlet housing.

[0007] Furthermore, the pressure relief valve assembly includes a shaft, a pressure relief valve housing, a pressure relief valve valve and spring 2. The pressure relief valve housing is threadedly connected to the valve group housing, and the air port at the right end of the pressure relief valve housing is connected to the interior of the valve group housing. The pressure relief valve valve and spring 2 are arranged inside the pressure relief valve housing. The shaft is threadedly connected to the left end of the pressure relief valve housing, and the right end of the shaft corresponds to the pressure relief valve valve. The pressure relief valve housing is provided with exhaust holes in the circumferential direction, and a nut is threadedly connected to the left end of the pressure relief valve housing.

[0008] Furthermore, a pressure gauge interface and a pressure sensor interface are installed on the outer surface of the valve group housing.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The control valve group has a compact structure, high reliability, good processability, simple installation, and the output pressure can be adjusted steplessly according to user needs. It has a wide range of applications, can filter high-pressure gas impurities in both inlet and outlet directions, has a pressure gauge and temperature and pressure sensor interface, monitors the cylinder pressure in real time, and has a manual high-pressure deflation function to meet maintenance needs.

[0011] 2. It has high integration and has the functions of filtering, decompression, deflation, inflation, and pressure feedback, which reduces the system's demand for different components, and correspondingly reduces the cost of the host system and the weight of the system. The components can be replaced as needed, and the filter can be replaced, which shortens the practical maintenance cycle and extends the practical life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is the principle diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the one-way valve assembly of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the pressure relief valve assembly of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the pressure reducing valve assembly of the utility model.

[0017] In the figure: 1 filter element 1, 2 one-way valve valve, 3 one-way valve housing, 4 spring 1, 5 exhaust hole, 6 shaft, 7 pressure relief valve housing, 8 pressure relief valve valve, 9 spring 2, 10 pressure reducing valve valve, 11 sealing block, 12 piston, 13 spring 3, 14 preload spring, 15 pressure reducing valve housing, 16 inlet housing, 17 nut, 101 inlet, 102 one-way valve assembly, 103 filter element 2, 104 gas cylinder interface, 105 valve group housing, 106 pressure reducing valve assembly, 107 locking nut, 108 adjusting rod, 109 pressure sensor interface, 1010 outlet, 1011 pressure gauge interface, 1012 pressure relief valve assembly, 1013 knob. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] See also Figure 1-5The utility model provides a technical solution: a gas pressure control valve group for a gas cylinder, comprising a one-way valve assembly 102, a housing 105, a pressure reducing valve assembly 106 and a pressure relief valve assembly 1012, a gas cylinder interface 104 is provided at the lower end of the housing 105, a filter element 103 is provided in the gas cylinder interface 104, the pressure relief valve assembly 1012 and the one-way valve assembly 102 are parallelly installed on one side of the housing 105, the outer port of the one-way valve assembly 102 is set as an inlet 101, and the pressure reducing valve assembly 1012 is provided with a filter element 103. 06 is installed on the other side of the housing 105. The pressure reducing valve assembly 106 includes a pressure reducing valve housing 15, a locking nut 107, a spring 3 13, a piston 12, a sealing block 11, a pressure reducing valve valve 10 and a preload spring 14. The pressure reducing valve housing 15 is threadedly connected to the valve group housing 105. The preload spring 14, the pressure reducing valve valve 10, the sealing block 11, the piston 12 and the spring 3 13 are sequentially installed in the pressure reducing valve housing 15. The preload spring 14 and the high-pressure air push the pressure reducing valve valve 10 and the sealing block 1 1 contacts and isolates the high-pressure air of the gas cylinder, thereby ensuring that the output pressure of the valve group is at a set stable value. The right end of the pressure reducing valve housing 15 is connected to the locking nut 107. The center of the locking nut 107 is threadedly connected with an adjusting rod 108. The inner end of the adjusting rod 108 contacts the spring seat of the spring three 13. Unlocking the locking nut 107 and rotating the adjusting rod 108 can adjust the pressure value after the pressure reducing valve assembly 106. The operation is simple, safe and reliable. The pressure reducing valve housing 15 is provided with an outlet 1010. When the outlet When the pressure of 1010 is lower than the set pressure, the piston 12 pushes the valve 10 to separate from the sealing block 11, so that the pressure reducing valve assembly 106 remains in the open state, and the high-pressure gas in the valve group housing 105 passes through the flow channel between the valve 10 and the sealing block 11 to replenish the product outlet; when the pressure of the outlet 1010 rises to the pressure set by the pressure reducing valve assembly 106, the piston 12 overcomes the elastic force of the spring three 13 under the action of the high-pressure air and moves toward the low-pressure chamber, and the piston 12 separates from the valve 10 to isolate the high-pressure air.

[0020] The one-way valve assembly 102 includes a one-way valve valve 2, a one-way valve housing 3 and a spring 4. The left end of the one-way valve housing 3 is threadedly connected to the valve group housing 105. The spring 4 and the one-way valve valve 2 are arranged in the one-way valve housing 3. The right end of the one-way valve housing 3 is threadedly connected to the inlet housing 16. The filter element 1 is arranged in the inlet housing 16. The inlet 101 is arranged at the outer end of the inlet housing 16. When the high-pressure gas cylinder needs to be inflated, the inlet 101 is connected to the gas source. When the pressure of the inlet 101 is higher than a certain value of the gas cylinder pressure, the high-pressure gas enters the product after being filtered by the filter element 1, and pushes the one-way valve valve 2 to overcome the gas pressure of the gas cylinder and the force of the spring 4 to separate from the sealing surface of the one-way valve housing 3, and open the gas path; when the pressure of the inlet 101 is lower than the gas cylinder pressure, the one-way valve valve 2 fits with the sealing surface of the one-way valve housing 3 under the combined force of the gas pressure of the gas cylinder and the spring 4, realizing the reverse cut-off function, and the gas cylinder can be ensured to be reliably sealed for a long time after the gas source is disconnected.

[0021] The pressure relief valve assembly 1012 includes a shaft 6, a pressure relief valve housing 7, a pressure relief valve valve 8 and a spring 9. The pressure relief valve housing 7 is threadedly connected to the valve group housing 105, and the air port at the right end of the pressure relief valve housing 7 is connected to the inside of the valve group housing 105. The pressure relief valve valve 8 and the spring 9 are arranged inside the pressure relief valve housing 7. The shaft 6 is threadedly connected to the left end of the pressure relief valve housing 7, and the right end of the shaft 6 corresponds to the pressure relief valve valve 8. The pressure relief valve housing 7 is provided with an exhaust hole 5 in the circumferential direction. The left end of the pressure relief valve housing 7 is threadedly connected with a nut 17. The pressure relief valve assembly 1012 is as shown in the attached Figure 4 As shown, when the system needs to relieve pressure, turning the knob 1013 can drive the shaft 6 to approach the pressure relief valve valve 8, and finally push the pressure relief valve valve 8 to separate from the pressure relief valve housing 7, opening the gas path; when the system does not need to relieve pressure, turning the knob 1013 can drive the shaft 6 away from the pressure relief valve valve 8, and the pressure relief valve valve 8 fits with the sealing surface of the pressure relief valve housing 7 under the combined force of the high-pressure gas and the spring 4, realizing the reverse cut-off function, with reliable sealing, no need for any tools, and easy operation.

[0022] The outer surface of the valve group housing 105 is installed with a pressure gauge interface 1011 and a pressure sensor interface 109. By connecting the pressure gauge and the pressure sensor, the gas cylinder pressure can be monitored in real time. The sealing structure of the valve group adopts two methods: rubber ring radial sealing and non-metallic material sealing, which can ensure that the product has good sealing performance in both low-pressure and high-pressure working environments. The product has strong versatility and can be applied to different working conditions.

[0023] When the system pressure is insufficient and needs to be inflated, the high-pressure gas enters from the inlet 101 of the one-way valve assembly 102, and is divided into two paths after being filtered by the one-way valve assembly 102. One path is to inflate the high-pressure gas cylinder through the filter element 103 as a reserve gas source; the other path is regulated by the pressure reducing valve assembly 106 to convert the high-pressure gas into low-pressure gas and output from the outlet 1010 to inflate the lower-level gas circuit; when the system needs to release the pressure of the gas cylinder for regular maintenance, the knob 1013 can be turned to deflate the high-pressure gas cylinder and the lower-level gas circuit at the same time.

[0024] The inflation ports of the valve group are facing the same direction, which allows the operator to intuitively read the residual pressure value inside the gas cylinder when inflating or deflation. The pressure sensor can monitor the pressure changes inside the gas cylinder for a long time, and any abnormalities can be discovered and maintained in time.

[0025] An air filter with a filtration accuracy of 15μm is installed at the gas cylinder interface 104 and the inlet 101, respectively, which can filter impurities in the filling port and the gas cylinder in a high-pressure environment. If the filter is blocked during subsequent use, there is no need to disassemble the valve group and no special tools are required to quickly disassemble and replace the filter element of the gas cylinder interface 104 or the inlet 101.

[0026] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A gas pressure control valve assembly for a gas cylinder, comprising a one-way valve assembly (102), a housing (105), a pressure reducing valve assembly (106) and a pressure relief valve assembly (1012), characterized in that: A gas cylinder interface (104) is provided at the lower end of the housing (105), a filter element 2 (103) is provided in the gas cylinder interface (104), a pressure relief valve assembly (1012) and a one-way valve assembly (102) are installed in parallel on one side of the housing (105), an outer port of the one-way valve assembly (102) is arranged as an inlet (101), a pressure reducing valve assembly (106) is installed on the other side of the housing (105), and the pressure reducing valve assembly (106) comprises a pressure reducing valve housing (15), a locking nut (107), a spring 3 (13), a piston (12), a sealing block (11), a pressure reducing valve ... The pressure reducing valve valve (10) and the preload spring (14), the pressure reducing valve housing (15) and the valve group housing (105) are threadedly connected, the preload spring (14), the pressure reducing valve valve (10), the sealing block (11), the piston (12) and the spring three (13) are sequentially installed in the pressure reducing valve housing (15), the right end of the pressure reducing valve housing (15) is connected to the locking nut (107), the center of the locking nut (107) is threadedly connected with an adjusting rod (108), the inner end of the adjusting rod (108) is in conflict with the spring seat of the spring three (13), and the pressure reducing valve housing (15) is provided with an outlet (1010).

2. A gas pressure control valve assembly for a gas cylinder according to claim 1, characterized in that: The one-way valve assembly (102) comprises a one-way valve valve (2), a one-way valve housing (3) and a spring one (4); the left end of the one-way valve housing (3) is threadedly connected to the valve assembly housing (105); the spring one (4) and the one-way valve valve (2) are arranged in the one-way valve housing (3); the right end of the one-way valve housing (3) is threadedly connected to an inlet housing (16); a filter element one (1) is arranged in the inlet housing (16); and the inlet (101) is arranged at the outer end of the inlet housing (16).

3. The gas pressure control valve assembly for a gas cylinder according to claim 1, characterized in that: The pressure relief valve assembly (1012) comprises a shaft (6), a pressure relief valve housing (7), a pressure relief valve valve (8) and a second spring (9); the pressure relief valve housing (7) is threadedly connected to the valve assembly housing (105), and the air port at the right end of the pressure relief valve housing (7) is communicated with the interior of the valve assembly housing (105); the pressure relief valve valve (8) and the second spring (9) are arranged inside the pressure relief valve housing (7); the shaft (6) is threadedly connected to the left end of the pressure relief valve housing (7), and the right end of the shaft (6) corresponds to the pressure relief valve valve (8); the pressure relief valve housing (7) is provided with an exhaust hole (5) in the circumferential direction, and a nut (17) is threadedly connected to the left end of the pressure relief valve housing (7).

4. The gas pressure control valve assembly for a gas cylinder according to claim 1, characterized in that: A pressure gauge interface (1011) and a pressure sensor interface (109) are installed on the outer surface of the valve group housing (105).

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