A pneumatic valve air source redundancy device

Abstract

The present invention relates to a pneumatic valve air source redundancy device, belonging to the technical field of pneumatic valves in the metallurgical industry. The technical solution is: a pressure regulating chamber (1-20) is provided on the upper part of the shell, a pressure equalizing chamber (1-7) is formed between the upper part of the shell and the middle part of the shell, an intermediate chamber (1-12) is formed between the middle part of the shell and the lower part of the shell, an air inlet chamber A (1-19) and an air inlet chamber B (1-15) connected to an air source A (3) and an air source B (4) are provided on the left side of the shell, and an air outlet chamber (1-8) connected to a pneumatic valve (2) is provided on the right side of the shell; the intermediate chamber (1-12) is connected to the air inlet chamber A (1-19), the air inlet chamber B (1-15) and the air outlet chamber (1-8), and the pressure equalizing chamber (1-7) is connected to the air outlet chamber (1-8). The beneficial effect of the present invention is that two air sources can be provided for the pneumatic valve at the same time. In the case of the loss of one air source, the other air source can ensure that the pneumatic valve will not have control failure or reset action.

Description

Technical Field

[0001] The invention relates to a pneumatic valve air source redundancy device, belonging to the technical field of pneumatic valves in the metallurgical industry. Background Art

[0002] Pneumatic valves are widely used in the industrial field. The principle is to use compressed air as power to push the piston in the actuator to move, rotate or lift the torsion shaft to drive the valve stem to drive a pneumatic control valve. All pneumatic valves are connected to the solenoid valve or valve positioner by an air source pipe, and the valve is driven by the actuator. In the actual production process, the air source pipe is often too long, which is prone to aging and breaking. At this time, the pneumatic valve will fail to control or reset due to low air source pressure or no air source supply, which will affect production at the least and cause safety accidents at the worst. Summary of the invention

[0003] The purpose of the present invention is to provide a pneumatic valve air source redundancy device, which can provide two air sources for the pneumatic valve at the same time. When one air source is lost, the other air source can ensure that the pneumatic valve will not have control failure or reset action, thereby solving the problems existing in the background technology.

[0004] The technical solution of the present invention is:

[0005] A pneumatic valve air source redundancy device comprises a pneumatic valve, an air source A, an air source B, a pressure regulating knob, a shell, a pressure regulating spring, a locking bolt, a pressure regulating diaphragm, a pressure equalizing chamber, an air outlet chamber, a pressure regulating column, an intermediate chamber, a check valve B, an air inlet chamber B pressure hole, an air inlet chamber B, a check valve A, an air inlet chamber A pressure hole, an air inlet chamber A and a pressure regulating chamber, wherein the shell comprises an upper portion, a middle portion and a lower portion, wherein a pressure regulating chamber is arranged at the upper portion of the shell, a pressure equalizing chamber is formed between the upper portion and the middle portion of the shell, an intermediate chamber is formed between the middle portion and the lower portion of the shell, an air inlet chamber A and an air inlet chamber B connected to the air source A and the air source B are arranged at the left side of the shell, and an air outlet chamber connected to the pneumatic valve is arranged at the right side of the shell; the intermediate chamber and the air inlet chamber A are connected to the air source A and the air source B, respectively. , the air inlet chamber B and the air outlet chamber are connected, the pressure equalizing chamber is connected with the air outlet chamber, and the air inlet chamber A and the air inlet chamber B are respectively provided with a check valve A and a check valve B; the front of the shell is provided with an air inlet chamber A pressure hole, an air inlet chamber B pressure hole and an air outlet chamber pressure hole, the air inlet chamber A pressure hole, the air inlet chamber B pressure hole and the air outlet chamber pressure hole are respectively connected with the air inlet chamber A, the air inlet chamber B and the air outlet chamber; the pressure regulating column passes through the through hole between the pressure equalizing chamber and the middle chamber, and the lower end of the pressure regulating column corresponds to the pressure regulating hole at the top of the middle chamber; the pressure regulating knob is connected to the side wall of the pressure regulating chamber on the upper part of the shell through a thread, and the pressure regulating diaphragm is pressed to the bottom of the pressure equalizing chamber by the pressure regulating spring; the locking bolt fixes the pressure regulating diaphragm and the pressure regulating column together.

[0006] The pressure regulating diaphragm is in the shape of a disc and is provided with an annular limiting platform corresponding to the pressure regulating spring.

[0007] The outer edge of the pressure regulating diaphragm is provided with a rubber pin, and the side wall of the pressure equalizing cavity is provided with a slot, and the rubber pin is inserted into the slot on the side wall of the pressure equalizing cavity.

[0008] The upper part, the middle part and the lower part of the shell are connected together by long-rod bolts, and rubber sealing gaskets are arranged between the upper part and the middle part of the shell and between the middle part and the lower part of the shell.

[0009] The air inlet cavity A pressure hole, the air inlet cavity B pressure hole and the air outlet cavity pressure hole on the front side of the shell are respectively threadedly connected to the air inlet cavity A pressure gauge, the air inlet cavity B pressure gauge and the air outlet cavity pressure gauge.

[0010] The so-called redundancy is to add extra equipment to ensure that the system works more reliably and safely. This device can provide two air sources for the pneumatic valve at the same time. In the case of one air source missing, the other air source can ensure that the pneumatic valve will not have control failure or reset action.

[0011] The beneficial effect of the present invention is that when one of the two air source pipes is aged, fractured, or broken, the other air source can pass through the device to ensure that the air source of the pneumatic valve is continuous and the pressure is stable. The pneumatic valve will not have control failure or reset action, ensuring that the valve state is not affected. At the same time, the faulty air source pipe can be intuitively judged through the pressure gauge, thereby eliminating potential accidents and ensuring the smooth progress of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the connection between the present invention and a pneumatic valve;

[0013] Figure 2 It is the appearance diagram of the present invention;

[0014] Figure 3 An exploded view of the present invention;

[0015] Figure 4 It is the principle diagram of the present invention;

[0016] In the figure: 1. Pneumatic valve air source redundancy device, 2. Pneumatic valve, 3. Air source A, 4. Air source B, 1-1. Pressure regulating knob, 1-2 Housing, 1-2-1 Upper part of housing, 1-2-2 Middle part of housing, 1-2-3 Lower part of housing, 1-3. Long rod bolt, 1-4 Pressure regulating spring, 1-5. Locking bolt, 1-6. Pressure regulating diaphragm, 1-6-1. Annular limit table, 1-6-2. Rubber latch, 1-7. Pressure equalizing chamber, 1-7-1. Pressure equalizing hole, 1-8. Air outlet chamber, 1-9. Pressure regulating hole, 1-10. Pressure regulating column, 1-11. Pressure hole of air outlet chamber, 1-12. Intermediate chamber, 1-13. Check valve B, 1-14. Pressure hole of air inlet chamber B, 1-15. Air inlet chamber B, 1-16. Inlet chamber B pressure gauge, 1-17. Check valve A, 1-18. Inlet chamber A pressure hole, 1-19. Inlet chamber A, 1-20. Pressure regulating chamber, 1-21. Inlet chamber A pressure gauge, 1-22. Outlet chamber pressure gauge. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0018] Refer to the attached Figure 1-4A pneumatic valve air source redundancy device comprises a pneumatic valve 2, an air source A3, an air source B4, a pressure regulating knob 1-1, a housing 1-2, a pressure regulating spring 1-4, a locking bolt 1-5, a pressure regulating diaphragm 1-6, a pressure equalizing chamber 1-7, an air outlet chamber 1-8, a pressure regulating column 1-10, an intermediate chamber 1-12, a check valve B1-13, an air inlet chamber B pressure hole 14, an air inlet chamber B1-15, a check valve A1-17, an air inlet chamber A pressure hole 1-18, an air inlet chamber A1-19 and a pressure regulating chamber 1- 20, the shell 1-2 comprises three parts: upper, middle and lower. The upper part of the shell is provided with a pressure regulating chamber 1-20, the upper part of the shell and the middle part of the shell form a pressure equalizing chamber 1-7, the middle part of the shell and the lower part of the shell form an intermediate chamber 1-12, the left side of the shell is provided with an air inlet chamber A1-19 and an air inlet chamber B1-15 connected to the air source A3 and the air source B4, and the right side of the shell is provided with an air outlet chamber 1-8 connected to the pneumatic valve 2; the intermediate chamber 1-12 and the air inlet chamber A1-19, the air inlet chamber B1-15 and The air outlet cavity 1-8 is connected, the pressure equalizing cavity 1-7 is connected to the air outlet cavity 1-8, and the air inlet cavity A1-19 and the air inlet cavity B1-15 are respectively provided with a check valve A1-17 and a check valve B1-13; the front of the shell is provided with an air inlet cavity A pressure hole 1-18, an air inlet cavity B pressure hole 1-14 and an air outlet cavity pressure hole (1-11), the air inlet cavity A pressure hole (1-18), the air inlet cavity B pressure hole (1-14) and the air outlet cavity pressure hole 1-11 are respectively connected to the air inlet cavity A1-19, the air inlet cavity B pressure hole (1-14) and the air outlet cavity pressure hole 1-11 Cavity B1-15 and the air outlet cavity 1-8 are connected; the pressure regulating column 1-10 passes through the through hole between the pressure equalizing cavity 1-7 and the middle cavity 1-12, and the lower end of the pressure regulating column 1-10 corresponds to the pressure regulating hole at the top of the middle cavity 1-12; the pressure regulating knob 1-1 is connected to the side wall of the pressure regulating cavity 1-20 on the upper part of the shell through a thread, and the pressure regulating diaphragm 1-6 is pressed to the bottom of the pressure equalizing cavity 1-7 through the pressure regulating spring 1-4; the locking bolt 1-5 fixes the pressure regulating diaphragm 1-6 and the pressure regulating column 1-10 together.

[0019] In this embodiment, refer to the attached Figure 1-4An air inlet cavity A1-19 and an air inlet cavity B1-15 connected to the air source A3 and the air source B4 are arranged on the left side of the upper shell 1-2-1 and the lower shell 1-2-3, and an air outlet cavity 1-8 connected to the pneumatic valve 2 is arranged on the right side of the middle shell 1-2-2. An air inlet cavity A pressure hole 1-18, an air inlet cavity B pressure hole 1-14 and an air outlet cavity pressure hole 1-11 are arranged on the front side of the shell 1-2, which are connected to the air inlet cavity A1-19, the air inlet cavity B1-15 and the air outlet cavity 1-8 respectively, and are used to install an air inlet cavity A pressure gauge 1-21, an air inlet cavity B pressure gauge 1-16 and an air outlet cavity pressure gauge 1-22. Check valves A1-17 and B1-13 are provided in the air inlet chamber A1-19 and the air inlet chamber B1-15, and the ventilation direction is from the air inlet chamber A1-19 and the air inlet chamber B1-15 to the intermediate chamber 1-12 respectively; the pressure regulating chamber 1-20, the pressure equalizing chamber 1-7 and the intermediate chamber 1-12 are provided inside the shell 1-2 from top to bottom, and the pressure regulating chamber 1-20 and the pressure equalizing chamber 1-7 are completely separated by the pressure regulating diaphragm 1-6, the pressure regulating knob 1-1 is connected to the side wall of the pressure regulating chamber 1-20 through a thread, and the pressure regulating diaphragm 1-6 is pressed to the bottom of the pressure equalizing chamber 1-7 through the pressure regulating spring 1-4. The pressure regulating diaphragm 1-6 has a metal disc in the middle, and a circular hole is provided in the middle of the metal disc. The locking bolt 1-5 is connected to the internal thread of the pressure regulating column 1-10 through the circular hole, so that the pressure regulating diaphragm 1-6 and the pressure regulating column 1-10 are completely fixed together. An annular limit platform 1-6-1 corresponding to the pressure regulating spring 1-4 is provided above the metal disc of the pressure regulating diaphragm 1-6, and a rubber latch 1-6-2 is provided on the outer edge of the pressure regulating diaphragm 1-6. The rubber latch 1-6-2 is exactly the same shape as the slot on the side wall of the pressure equalizing chamber 1-7 and is inserted therein. When the upper part 1-2-1 of the shell and the middle part 1-2-2 of the shell are tightly connected, the rubber latch 1-6-2 cannot be pulled out of the shell 1-2; the pressure equalizing chamber 1-7 is connected to the outlet chamber 1-8 through the pressure equalizing hole 1-7-1 at the bottom thereof. The pressure regulating column 1-10 passes through the through hole between the pressure equalizing chamber 1-7 and the middle chamber 1-12, and the lower end of the pressure regulating column 1-10 is expanded into a baffle 1-10-1 and corresponds to the pressure regulating hole 1-9 at the top of the middle chamber 1-12. When the pressure regulating column 1-10 rises to the highest position, the baffle 1-10-1 at its lower end can close the pressure regulating hole 1-9; the upper part 1-2-1 of the shell, the middle part 1-2-2 of the shell and the lower part 1-2-3 of the shell are connected and fixed by 8 long rod bolts 1-3, and rubber gaskets are provided between them for sealing.

[0020] The usage and working principle are as follows:

[0021] See also Figure 1, the air inlet chamber A1-19 of the pneumatic valve air source redundancy device 1 is connected to the air source A3, the air inlet chamber B1-15 is connected to the air source B4, and the air outlet chamber 1-8 is connected to the pneumatic valve 2. Since the pressures of the air sources A3 and B4 may be different and higher than the pressure required by the pneumatic valve 2, the pneumatic valve air source redundancy device 1 is first used to adjust the air inlet pressure of the pneumatic valve 2. Figure 4 , observe the pressure gauge 1-22 of the air outlet cavity, manually rotate the pressure regulating knob 1-1, adjust the pressure of the pressure regulating spring 1-4, and the pressure regulating spring 1-4 presses the pressure regulating diaphragm 1-6. The central part of the pressure regulating diaphragm 1-6 is a metal disc, which plays a role in transmitting force, and the outer edge is a rubber sealing ring, which plays a role in sealing the pressure equalizing cavity 1-7 and is fixed in the housing 1-2. The pressure regulating spring 1-4 transmits the pressure to the pressure regulating diaphragm 1-6, and the pressure regulating diaphragm 1-6 drives the pressure regulating column 1-10 to move up and down through the locking nut, and the baffle 1-10-1 at the lower end of the pressure regulating column 1-10 moves with With the up and down displacement, the ventilation volume of the pressure regulating hole 1-9 changes, the pressure of the compressed air in the middle cavity 1-12 and the air outlet cavity 1-8 changes and is transmitted to the pressure equalizing cavity 1-7 along the pressure equalizing hole 1-7-1. The compressed air pressure in the pressure equalizing cavity 1-7 pushes the pressure regulating diaphragm 1-6 to move upward. When the pressure displayed by the air outlet cavity pressure gauge 1-22 reaches the air source pressure required by the pneumatic valve 2, stop rotating the pressure regulating knob 1-1. Finally, the pressure in the pressure equalizing cavity 1-7 is the same as the pressure of the pressure regulating spring 1-6, and the pressure in the air outlet cavity 1-8 is in the required balanced state.

[0022] Assuming that the gas source pipe A3 is broken, the pressure gauge 1-21 of the air inlet chamber A shows a pressure of "0MPa". At this time, there is no pressure in the air inlet chamber A1-19, so the check valve A1-17 is completely closed, and the gas source B4 still enters the pneumatic valve 2 along the air inlet chamber B1-15, the pressure regulating hole 1-9, the middle chamber 1-12, and the air outlet chamber 1-8. There will be no gas leakage, and the state of the pneumatic valve 2 will not change after the gas source B4 is stabilized, which ensures the normal production and eliminates potential safety hazards.

[0023] Assuming that the gas source pipe of gas source B4 is broken, the pressure gauge 1-13 of air inlet chamber B shows the pressure as "0MPa". At this time, there is no pressure in air inlet chamber B1-15, so the check valve B1-13 is completely closed. The gas source A3 still enters the pneumatic valve 2 along the air inlet chamber A1-19, the pressure regulating hole 1-9, the middle chamber 1-12, and the air outlet chamber 1-8. There will be no gas leakage. Moreover, after the gas source A3 is stabilized, the state of the pneumatic valve 2 will not change, which ensures the normal production and eliminates the potential safety hazards.

Claims

1. A pneumatic valve air source redundancy device, characterized in that: The invention comprises a pneumatic valve (2), an air source A (3), an air source B (4), a pressure regulating knob (1-1), a housing (1-2), a pressure regulating spring (1-4), a locking bolt (1-5), a pressure regulating diaphragm (1-6), a pressure equalizing chamber (1-7), an air outlet chamber (1-8), a pressure regulating column (1-10), an intermediate chamber (1-12), a check valve B (1-13), an air inlet chamber B pressure hole (14), an air inlet chamber B (1-15), a check valve A (1-17), an air inlet chamber A pressure hole (1-18), an air inlet chamber A (1-19) and a pressure regulating chamber (1-20), wherein the housing (1-2) comprises an upper The shell body has three parts: a pressure regulating chamber (1-20) is provided at the upper part of the shell body, a pressure equalizing chamber (1-7) is formed between the upper part of the shell body and the middle part of the shell body, and an intermediate chamber (1-12) is formed between the middle part of the shell body and the lower part of the shell body. An air inlet chamber A (1-19) and an air inlet chamber B (1-15) connected to an air source A (3) and an air source B (4) are provided on the left side of the shell body, and an air outlet chamber (1-8) connected to a pneumatic valve (2) is provided on the right side of the shell body; the intermediate chamber (1-12) is communicated with the air inlet chamber A (1-19), the air inlet chamber B (1-15) and the air outlet chamber (1-8), and the pressure equalizing chamber (1-7) is communicated with the air outlet chamber (1-19). 8) are connected, and a check valve A (1-17) and a check valve B (1-13) are respectively provided inside the air inlet chamber A (1-19) and the air inlet chamber B (1-15); an air inlet chamber A pressure hole (1-18), an air inlet chamber B pressure hole (1-14) and an air outlet chamber pressure hole (1-11) are provided on the front of the shell body, and the air inlet chamber A pressure hole (1-18), the air inlet chamber B pressure hole (1-14) and the air outlet chamber pressure hole (1-11) are respectively connected to the air inlet chamber A (1-19), the air inlet chamber B (1-15) and the air outlet chamber (1-8); the pressure regulating column (1-10) passes through the pressure equalizing chamber (1-7) and the intermediate chamber (1-12), the lower end of the pressure regulating column (1-10) corresponds to the pressure regulating hole at the top of the intermediate cavity (1-12); the pressure regulating knob (1-1) is connected to the side wall of the pressure regulating cavity (1-20) at the upper part of the shell through a thread, and the pressure regulating diaphragm (1-6) is pressed toward the bottom of the pressure equalizing cavity (1-7) through the pressure regulating spring (1-4); the locking bolt (1-5) fixes the pressure regulating diaphragm (1-6) and the pressure regulating column (1-10) together; the pressure regulating diaphragm (1-6) is disc-shaped, and an annular limit platform (1-6-1) corresponding to the pressure regulating spring (1-4) is provided on the pressure regulating diaphragm (1-6); The upper part of the shell, the middle part of the shell and the lower part of the shell are connected together by long rod bolts (1-3), and rubber sealing gaskets are provided between the upper part of the shell and the middle part of the shell, and between the middle part of the shell and the lower part of the shell; The air inlet cavity A pressure hole (1-18), the air inlet cavity B pressure hole (1-14) and the air outlet cavity pressure hole (1-11) on the front surface of the shell are respectively threadedly connected to the air inlet cavity A pressure gauge (1-21), the air inlet cavity B pressure gauge (1-16) and the air outlet cavity pressure gauge (22).

2. A pneumatic valve air source redundancy device according to claim 1, characterized in that: The outer edge of the pressure regulating diaphragm (1-6) is provided with a rubber latch, and the side wall of the pressure equalizing chamber (1-7) is provided with a slot, and the rubber latch is inserted into the slot on the side wall of the pressure equalizing chamber (1-7).

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