A high-pressure gas pneumatic control valve

Abstract

The present invention relates to a high-pressure gas pneumatic control valve, which includes a PLC module, a solenoid valve, a valve core position detection transmitter, and a control valve body. The valve core position detection transmitter is connected to the control valve body. The detection transmitter transmits the valve core position signal to the PLC module. The PLC module controls the on-off of the solenoid valve through signal analysis. The solenoid valve is connected to the power gas source connector on the control valve body. The high-pressure gas pneumatic control valve can achieve the flow control of high-pressure gas in the pipeline.

Description

Technical Field

[0001] The present invention relates to the field of gas pipelines, and is particularly applicable to the field of high-pressure gas cylinder filling, and specifically relates to a high-pressure gas pneumatic control valve. Background Art

[0002] With the development of science and technology, the requirements for the automation level and safety of factories are getting higher and higher. Especially in the field of high-pressure gas cylinder filling, if the speed of high-pressure gas entering the cylinder is too fast, it will cause the temperature of the cylinder to accumulate and rise, bringing danger to the cylinder. If the speed is too slow, the filling efficiency will be reduced.

[0003] The invention and application of existing high-pressure gas pneumatic control valves are the basic conditions for realizing automatic filling of high-pressure cylinders. However, in this field in China, the products are all manual valves, which are large in size and high in cost. If completely relying on imports, it will cause problems such as long procurement cycle and high cost. With the development of the domestic gas industry, there is an urgent need for a new product with high automation, safety and stability to fill the domestic gap. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a high-pressure gas pneumatic control valve, which fills the domestic gap in this field.

[0005] The present invention is realized through the following technical solutions:

[0006] Provide a high-pressure gas pneumatic control valve, including a PLC module, a solenoid valve, a valve core position detection transmitter and a control valve body. The valve core position detection transmitter is connected to the control valve body. The detection transmitter transmits the valve core position signal to the PLC module. The PLC module controls the on-off of the solenoid valve through signal analysis. The solenoid valve is connected to the power air source joint on the control valve body.

[0007] Preferably, the control valve body includes a cylinder head, a cylinder barrel, a front valve body, a rear valve body and a rear valve cover. The cylinder head is connected to the cylinder barrel. The cylinder barrel is connected to the front valve body. The front valve body is connected to the rear valve body. The rear valve body is connected to the rear valve cover.

[0008] Further preferably, the cylinder head, cylinder barrel, front valve body, rear valve body and rear valve cover are of a hollow design. The connecting screw of the valve core position detecting transmission passes through the cylinder head and is connected to the adapter nut inside the cylinder barrel. The adapter nut is connected to the central axis of the piston inside the cylinder barrel. A spring is sleeved outside the adapter nut, and the spring abuts against the outer wall of the piston. A gland is provided inside the front valve body. A valve seat is provided at the connection between the front valve body and the rear valve body. The piston is connected to the valve core on the right. The valve core sequentially passes through the gland and the valve seat, and extends into the rear valve cover through the rear valve body. An air chamber is provided between the piston and the gland. The front valve body is provided with a first vent port, and the rear valve body is provided with a second vent port. When the first vent port is used as the air outlet, the second vent port is used as the air inlet, or when the second vent port is used as the air outlet, the first vent port is used as the air inlet. A safety valve is provided beside the power air source joint on the opposite side of the surface where the vent port of the front valve body is located. The safety valve is connected to the air chamber.

[0009] Further preferably, a piston guide seal is provided outside the piston.

[0010] Further preferably, a first valve core guide sleeve, a second valve core guide sleeve, a first valve core seal and a second valve core seal are respectively sleeved on the left and right of the valve core. The first valve core guide sleeve and the first valve core seal are connected and located inside the front valve body. The second valve core guide sleeve and the second valve core seal are connected and located inside the rear valve body.

[0011] Further preferably, a valve core gasket is provided at the position where the valve seat contacts the valve core.

[0012] Preferably, a bracket is provided on the cylinder head, and a valve core position detecting transmitter is fixed on the bracket.

[0013] Preferably, a groove structure is provided at one end of the rear valve cover away from the rear valve body.

[0014] Preferably, the cylinder head, cylinder barrel, front valve body, rear valve body and rear valve cover are made of brass material, and the valve core is made of stainless steel material or nickel alloy material.

[0015] Advantages of the present invention: The high-pressure gas pneumatic control valve has a small volume, high pressure resistance, up to 42 MPa at most; simple structure, reliable action, long service life and wide application range; the valve body part is made of brass material with a copper content less than 70%, and the valve core is made of stainless steel material or nickel alloy material, which can be applied to non-corrosive gases including oxygen. The high-pressure gas pneumatic control valve can effectively control the speed of high-pressure gas entering the steel cylinder, reduce the damage to the high-pressure steel cylinder, and at the same time ensure the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic diagram of the external connection of the high-pressure gas pneumatic control valve of the present invention;

[0017] Figure 2 Cross-sectional view of the control valve body and the valve core position detection transmitter of the present invention;

[0018] Figure 3 Schematic diagram of the structure of the cylinder head of the present invention;

[0019] Figure 4 Schematic diagram of the structure of the cylinder barrel of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the front valve body of the present invention;

[0021] Figure 6 Cross-section of the front valve body of the present invention;

[0022] Figure 7 Schematic diagram of the structure of the rear valve body of the present invention;

[0023] Figure 8 Cross-section of the rear valve body of the present invention;

[0024] Figure 9 Schematic diagram of the structure of the rear valve cover of the present invention;

[0025] Figure 10 Schematic diagram of the internal structure of the valve core position detection transmitter and the control valve body of the present invention.

[0026] As shown in the figure:

[0027] 1. Cylinder barrel, 2. Power air source connector, 3. Safety valve, 4. Cylinder head, 5. Bracket, 6. Valve core position detection transmitter, 7. Spring, 8. Piston, 9. Piston guide seal, 10. Air chamber, 11. Gland, 12. First valve core guide sleeve, 13. First valve core seal, 14. Front valve body, 15. Valve core, 16. Valve core gasket, 17. Valve seat, 18. Rear valve body, 19. Second vent port, 20. Second valve core seal, 21. Second valve core guide sleeve, 22. Rear valve cover, 23. First vent port, 24. PLC module, 25. Solenoid valve. Specific embodiments

[0028] To clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific embodiments.

[0029] As Figure 1As shown in the figure, a high-pressure gas pneumatic control valve includes a PLC module 24, a solenoid valve 25, a valve core position detection transmitter 6, and a control valve body. The valve core position detection transmitter 6 is connected to the control valve body. The detection transmitter transmits the valve core 15 position signal to the PLC module 24. The PLC module 24 controls the on-off of the solenoid valve 25 through signal analysis. The solenoid valve 25 is connected to the power air source connector 2 on the control valve body.

[0030] As Figure 1 shown in the figure, the control valve body includes a cylinder head 4, a cylinder barrel 1, a front valve body 14, a rear valve body 18, and a rear valve cover 22. The cylinder head 4 is connected to the cylinder barrel 1. The cylinder barrel 1 is connected to the front valve body 14. The front valve body 14 is connected to the rear valve body 18. The rear valve body 18 is connected to the rear valve cover 22. A bracket 5 is provided on the cylinder head 4. The valve core position detection transmitter 6 is fixed on the bracket 5. A groove structure is provided at one end of the rear valve cover 22 away from the rear valve body 18, increasing the overall heat exchange area of the valve and improving the valve's ability to cope with temperature changes. The cylinder head 4, the cylinder barrel 1, the front valve body 14, the rear valve body 18, and the rear valve cover 22 are made of brass material. The valve core 15 is made of stainless steel material or nickel alloy material. The above materials meet the requirements of national standards and can be applied to non-corrosive gases including oxygen.

[0031] As Figures 2 - 10As shown in the figure, the cylinder head 4, cylinder barrel 1, front valve body 14, rear valve body 18, and rear valve cover 22 are designed to be hollow. The connecting screw of the valve core position detecting transmission 6 passes through the cylinder head 4 and is connected to the adapter nut inside the cylinder barrel 1. The adapter nut is connected to the central axis of the piston 8 inside the cylinder barrel 1. A spring 7 is sleeved outside the adapter nut, and the spring 7 abuts against the piston 8. A piston guide seal 9 is sleeved outside the piston 8. A gland 11 is provided inside the front valve body 14. A valve seat 17 is provided at the connection between the front valve body 14 and the rear valve body 18. The piston 8 is connected to the valve core 15 on the right. The valve core 15 sequentially passes through the gland 11 and the valve seat 17 and extends into the rear valve cover 22 through the rear valve body 18. A first valve core guide sleeve 12, a second valve core guide sleeve 21, a first valve core seal 13, and a second valve core seal 20 are respectively sleeved on the left and right of the valve core 15. The first valve core guide sleeve 12 and the first valve core seal 13 are connected and located inside the front valve body 14. The second valve core guide sleeve 21 and the second valve core seal 20 are connected and located inside the rear valve body 18. A valve core gasket 16 is provided at the position where the valve seat 17 contacts the valve core 15. An air chamber 10 is provided between the piston 8 and the gland 11. The front valve body 14 is provided with a first vent port 23, and the rear valve body 18 is provided with a second vent port 19. When the first vent port 23 serves as the outlet port, the second vent port 19 serves as the inlet port, or when the second vent port 19 serves as the outlet port, the first vent port 23 serves as the inlet port. A safety valve 3 is provided beside the power air source connector 2 on the opposite side of the surface where the vent port of the front valve body 14 is located. The safety valve 3 is connected to the air chamber 10.

[0032] Working principle of the present invention: For the high-pressure gas pneumatic control valve described in the present invention, the air pipe of the power air source is connected to the power air source connector 2. In the normal state, due to the action of the spring 7, the valve is in the closed state. When the power air source enters the air chamber 10 through the power air source connector 2, under the push of the air pressure, the piston 8 drives the valve core 15 to move towards the cylinder head 4, and the first vent port 23 and the second vent port 19 are connected, and the valve is opened at this time;

[0033] The valve core position signal of the valve core 15 is transmitted to the PLC module 24 through the valve core position detecting transmitter 6. When the valve core 15 reaches the position, the PLC module 24 controls the on-off of the solenoid valve 25 to realize the amount of gas in the air chamber 10, and further controls the opening degree of the opened valve, so as to realize the flow control of the high-pressure gas in the pipeline and ensure the filling efficiency;

[0034] The air chamber 10 of the high-pressure gas pneumatic control valve is connected to the safety valve 3. When the pressure in the air chamber 10 is too high, the safety valve 3 automatically opens to discharge the excess gas, playing a role in protecting the cylinder barrel 1.

[0035] Certainly, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopted from the prior art, which will not be elaborated herein. The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A high-pressure gas pneumatic control valve, characterized in that: It includes a PLC module, a solenoid valve, a valve core position detection transmitter, and a regulating valve body. The valve core position detection transmitter is connected to the regulating valve body. The valve core position detection transmitter transmits the valve core position signal to the PLC module. The PLC module controls the on / off of the solenoid valve through signal analysis. The solenoid valve is connected to the power air source joint on the regulating valve body; The regulating valve body includes a cylinder head, a cylinder barrel, a front valve body, a rear valve body, and a rear valve cover. The cylinder head is connected to the cylinder barrel. The cylinder barrel is connected to the front valve body. The front valve body is connected to the rear valve body. The rear valve body is connected to the rear valve cover; The cylinder head, cylinder barrel, front valve body, rear valve body, and rear valve cover are designed to be hollow. The connecting screw of the valve core position detection transmitter passes through the cylinder head and is connected to the adapter nut inside the cylinder barrel. The adapter nut is connected to the central axis of the piston inside the cylinder barrel. A spring is sleeved outside the adapter nut. The spring abuts against the outer wall of the piston. A gland is provided inside the front valve body. A valve seat is provided at the connection between the front valve body and the rear valve body. The piston is connected to a valve core on the right. The valve core passes through the gland and the valve seat in sequence and extends into the rear valve cover through the rear valve body. An air chamber is provided between the piston and the gland. The front valve body is provided with a first air vent. The rear valve body is provided with a second air vent. When the first air vent is used as the air outlet, the second air vent is used as the air inlet, or when the second air vent is used as the air outlet, the first air vent is used as the air inlet. A safety valve is provided beside the power air source joint on the opposite side of the surface where the air vent of the front valve body is located. The safety valve is connected to the air chamber; The air pipe of the power air source is connected to the power air source joint. In the normal state, due to the action of the spring, the valve is in the closed state. When the power air source enters the air chamber through the power air source joint, under the push of the air pressure, the piston drives the valve core to move towards the cylinder head direction, and the first air vent and the second air vent are connected, and the valve is opened at this time; The valve core position detection transmitter transmits the valve core position signal to the PLC module. When the valve core reaches the position, the PLC module controls the on / off of the solenoid valve to adjust the amount of gas in the air chamber, and then controls the opening degree of the opened valve to achieve the flow control of high-pressure gas in the pipeline, ensuring the filling efficiency; The air chamber of the high-pressure gas pneumatic regulating valve is connected to the safety valve. When the air chamber pressure is too high, the safety valve automatically opens to discharge the excess gas, playing a role in protecting the cylinder barrel.

2. The high-pressure gas pneumatic control valve according to the claim, characterized in that: A piston guide seal is provided outside the piston.

3. The high-pressure gas pneumatic control valve according to the claim is characterized in that: A first valve core guide sleeve, a second valve core guide sleeve, a first valve core seal, and a second valve core seal are respectively sleeved on the left and right of the valve core. The first valve core guide sleeve and the first valve core seal are connected and are located inside the front valve body. The second valve core guide sleeve and the second valve core seal are connected and are located inside the rear valve body.

4. The high-pressure gas pneumatic control valve according to the claim is characterized in that: A valve core gasket is provided at the position where the valve seat contacts the valve core.

5. The high-pressure gas pneumatic control valve according to the claim, characterized in that: A bracket is provided on the cylinder head. The valve core position detection transmitter is fixed on the bracket.

6. The high-pressure gas pneumatic control valve according to the claim, characterized in that: A groove structure is provided at one end of the rear valve cover away from the rear valve body.

7. The high-pressure gas pneumatic control valve according to the claim is characterized in that: The cylinder head, cylinder barrel, front valve body, rear valve body, and rear valve cover are made of brass material, and the valve core is made of stainless steel material or nickel alloy material.

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