CN212226159U - Integral pneumatic control valve - Google Patents
Integral pneumatic control valve Download PDFInfo
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- CN212226159U CN212226159U CN202020776495.8U CN202020776495U CN212226159U CN 212226159 U CN212226159 U CN 212226159U CN 202020776495 U CN202020776495 U CN 202020776495U CN 212226159 U CN212226159 U CN 212226159U
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- actuating mechanism
- valve
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- push rod
- processing circuit
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Abstract
The utility model relates to an integral pneumatic control valve belongs to control valve technical field. Comprises a valve part, an actuating mechanism and a connecting piece; the actuating mechanism comprises an air source interface, a pressure reducing valve, a filter, a pressure sensor I, an air source pressure processing circuit, an oil atomizer, a piezoelectric valve amplifier, a membrane chamber, a membrane, a spring, a push rod, a power supply, a detection circuit, a CPU processor, a displacement sensor, a valve position processing circuit, a feedback assembly, a pressure sensor II, a pressure processing circuit, a power supply wiring terminal, a display screen, an actuating mechanism shell, a fastener and a built-in air passage, wherein all actuating mechanism parts are installed inside the actuating mechanism shell by the actuating mechanism shell, and the push rod of the actuating mechanism is firmly connected with the valve rod of the valve part by a connecting piece, so that the valve rod of the valve part generates the same axial displacement under the driving of the actuating mechanism push rod. The utility model has the advantages that: no external connection pipe is needed; the whole closed structure supplies air. The number of parts is reduced, and the weight of the system is reduced.
Description
Technical Field
The utility model relates to an integral pneumatic control valve belongs to control valve technical field.
Background
The existing pneumatic control valve is mainly required to be connected with various accessories on an actuating mechanism in order to meet the requirements of the production process and achieve the purpose of high-requirement control, therefore, a plurality of air source pipelines and cable wires are required to be connected between the accessories and the actuating mechanism, the complexity of the system is increased, and when the complex working conditions are on site, the adverse effects on the air source connecting pipes and the cable wires are easier to generate, so that the whole control system is influenced.
Disclosure of Invention
In order to overcome the weak point of above-mentioned prior art, the utility model provides an integral pneumatic control valve comprises control valve and actuating mechanism two parts, and the required various annexes of control process are integrated in the actuating mechanism casing to simplify the wiring of on-the-spot electric connector and air supply connector, reduce the installation of air supply pipeline and cable conductor between each annex and between annex and the actuating mechanism, avoid the influence of the abominable operating mode in scene to air supply pipeline and cable conductor.
The utility model discloses a realize through following technical scheme: an integral pneumatic control valve characterized by: comprises a valve part, an actuating mechanism and a connecting piece;
the actuating mechanism comprises an air source interface, a pressure reducing valve, a filter, a pressure sensor I, an air source pressure processing circuit, an oil atomizer, a piezoelectric valve amplifier, a membrane chamber, a membrane, a spring, a push rod, a power supply, a detection circuit, a CPU (central processing unit) processor, a displacement sensor, a valve position processing circuit, a feedback assembly, a pressure sensor II, a pressure processing circuit, a power supply wiring terminal, a display screen, an actuating mechanism shell, a fastener and a built-in air circuit;
the actuating mechanism shell comprises a lower cover and an upper cover, the lower cover and the upper cover are firmly connected by a fastener, all actuating mechanism parts are installed inside the actuating mechanism shell by the actuating mechanism shell, and a push rod of the actuating mechanism is firmly connected with a valve rod of the valve part by a connecting piece, so that the valve rod of the valve part generates the same axial displacement under the driving of the actuating mechanism push rod.
The built-in gas circuit is used for communicating the filter, the pressure reducing valve, the oil atomizer, the piezoelectric valve amplifier and the membrane chamber and providing a gas circuit leading to the membrane chamber for an input gas source of the actuating mechanism; the built-in gas circuit communicates the membrane chamber and the piezoelectric valve amplifier with the atmosphere and provides an exhaust channel for the membrane chamber, a gas source output end of the pressure reducing valve is connected with a gas circuit branch pipe to the pressure sensor I, and the output end of the pressure sensor I is connected to a gas source pressure processing circuit through a cable and then connected to the CPU processor through the cable; before an air source enters the membrane chamber, an air path branch pipe is connected to an output pressure pipeline of the piezoelectric valve amplifier and then connected to a pressure sensor II, the output end of the pressure sensor II is connected to a membrane chamber pressure processing circuit through a cable, and then the output end of the pressure sensor II is connected to a CPU processor through the cable.
The membrane is supported by the tray and is connected to the push rod, and the push rod can generate corresponding displacement along with the displacement of the membrane; the feedback assembly is connected with the push rod and is mechanically connected with the displacement sensor; the output end of the displacement sensor is connected to the valve position processing circuit through a cable and then connected to the CPU through the cable; the power supply and the detection circuit are connected with the CPU processor through a cable; the CPU processor is connected with the display screen through a cable; and a display screen observation window is arranged on the executing mechanism shell.
The utility model has the advantages that: no external connection pipe is needed; the totally enclosed structure avoids pollution, stops external leakage, and supplies air in all. The structure is simplified, the number of parts is reduced, the control precision is improved, the overall reliability is improved, and the stability of the control process is improved. The wiring of the field electrical interface and the air source interface is simplified, the installation of the air source connecting pipe and the cable between the accessories and the actuating mechanism is avoided, and the influence of the field severe working condition on the air source connecting pipe and the cable is avoided. The volume of the whole pneumatic control valve is reduced, and the weight of the system is reduced.
Drawings
The invention will be further explained below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
An integral pneumatic control valve as shown in fig. 1 and 2, characterized in that: comprises a valve part 1, an actuating mechanism 2 and a connecting piece 3;
the actuating mechanism 2 comprises an air source interface 2-1, a pressure reducing valve 2-2, a filter 2-3, a pressure sensor I2-4, an air source pressure processing circuit 2-5, an oil atomizer 2-6, a piezoelectric valve amplifier 2-7, a membrane chamber 2-8, a membrane 2-9, a spring 2-10, a push rod 2-11, a power supply 2-12, a detection circuit 2-13, a CPU processor 2-14, a displacement sensor 2-15, a valve position processing circuit 2-16, a feedback component 2-17, a pressure sensor II 2-18, a pressure processing circuit 2-19, a power supply wiring terminal 2-20, a display screen 2-21, an actuating mechanism shell 2-22, a fastener 2-23 and a built-in air circuit 2-24;
the actuator shell 2-22 comprises a lower cover 2-22-1 and an upper cover 2-22-2, the lower cover 2-22-1 and the upper cover 2-22-2 are firmly connected by fasteners 2-23, all actuator parts are installed inside the actuator shell 2-22 by the actuator shell 2-22 and protected from the external environment, and a push rod 2-11 of the actuator 2 is firmly connected with a valve rod of the valve part 1 by a connecting piece 3, so that the valve rod of the valve part 1 generates the same axial displacement under the driving of the push rod 2-11 of the actuator 2.
The built-in gas path 2-24 is used for communicating the filter 2-3, the pressure reducing valve 2-2, the oil atomizer 2-6, the piezoelectric valve amplifier 2-7 and the membrane chamber 2-8 and providing a gas path leading to the membrane chamber 2-8 for an input gas source of the actuating mechanism 2; the built-in gas circuit 2-24 is used for communicating the membrane chamber 2-8 and the piezoelectric valve amplifier 2-7 with the atmosphere and providing a gas exhaust channel for the membrane chamber 2-8, a gas source output end of the pressure reducing valve 2-2 is connected with a gas circuit branch pipe to the pressure sensor I2-4, and the output end of the pressure sensor I2-4 is connected to the gas source pressure processing circuit 2-5 through a cable and then connected to the CPU processor 2-14 through the cable; before an air source enters the membrane chamber 2-8, an air path branch pipe is connected to an output pressure pipeline of the piezoelectric valve amplifier 2-7 to the pressure sensor II 2-18, the output end of the pressure sensor II 2-18 is connected to a membrane chamber pressure processing circuit 2-19 through a cable, and then is connected to the CPU processor 2-14 through the cable.
The membrane 2-9 is supported by the tray and connected to the push rod 2-11, and the push rod 2-11 can generate corresponding displacement along with the displacement of the membrane 2-9; the feedback component 2-17 is connected with the push rod 2-11 and is mechanically connected with the displacement sensor 2-15; the output end of the displacement sensor 2-15 is connected to the valve position processing circuit 2-16 through a cable and then connected to the CPU processor 2-14 through a cable; the power supply 2-12 and the detection circuit 2-13 are connected with the CPU processor 2-14 through cables; the CPU processor 2-14 is connected with the display screen 2-21 through a cable; and display screen observation windows are arranged on the execution mechanism shells 2-22.
The filter 2-3 can filter moisture in the air source, prevent the moisture from entering the actuating mechanism membrane chamber 2-8 through the built-in air passage 2-24, and avoid the moisture from corroding the membrane 2-9 and the membrane chamber 2-8.
The pressure reducing valve 2-2 stabilizes the pressure of the air source from the filter 2-3 at a required value, so that the pressure of the air source entering the membrane chamber 2-8 is in a constant state, and the damage to each part in the actuating mechanism 2 caused by sudden change of the pressure of the air source can be reduced.
The pressure sensor I2-4 can monitor the air source pressure at the outlet of the pressure reducing valve 2-2, convert the air source pressure into an electric signal and display the electric signal on the display screen 2-21 through the CPU processor 2-14.
The oil atomizer 2-6 lubricates the internal parts of the actuating mechanism 2, and the service life of the actuating mechanism 2 is prolonged.
The piezoelectric valve amplifier 2-7 can open or close the air path between the air source and the membrane chamber 2-8 under the control of the CPU processor 2-14, and can also discharge the air source in the membrane chamber 2-8.
And when the pressure of the air source passing through the piezoelectric valve amplifier 2-7 is changed, the pressure in the membrane chamber 2-8 is unbalanced with the counter force of the spring, so that the push rod 2-11 of the actuating mechanism is driven to generate displacement until the pressure in the membrane chamber 2-8 and the counter force of the spring reach a balanced state again.
And the feedback component 2-17 feeds back the displacement of the push rod 2-11 of the actuating mechanism to the displacement sensor 2-15.
And a displacement sensor 2-15 for converting the actual displacement of the valve stem from the feedback assembly 2-17 into a corresponding displacement electrical signal.
The valve position processing circuit 2-16 converts the displacement electric signal from the displacement sensor 2-15 into a stable electric signal recognizable to the CPU processor 2-14, and then feeds back the stable electric signal to the CPU processor 2-14.
The pressure sensors II 2-18 are communicated with the membrane chambers 2-8 and can convert the air source pressure in the membrane chambers 2-8 into membrane chamber pressure electric signals.
And the pressure processing circuit 2-19 converts the diaphragm chamber pressure electric signal from the pressure sensor II 2-18 into an electric signal which is stable and can be identified by the CPU processor 2-14, and then feeds the electric signal back to the CPU processor 2-14.
A CPU processor 2-14 which can receive an input electric signal from the outside of the actuator 2; the opening and closing of the piezoelectric valve amplifiers 2-7 can be controlled; the pressure sensor can receive electric signals from the pressure sensors I2-4, the pressure sensors II 2-18 and the displacement sensors 2-15; the valve opening push rod displacement, air source pressure, membrane chamber pressure, flow characteristics and stroke can be output to the display screens 2-21.
And the power supply wiring terminals 2-20 are used for connecting the input signal of the actuating mechanism with a cable.
And the junction box is used for preventing the wiring terminal from being exposed to the external environment and avoiding the control system from being influenced by the outside.
The power supply 2-12 and the detection circuit 2-13 detect the input electric signal outside the actuator 2 and send the detected signal to the CPU processor 2-14.
The actuator housing 2-22 houses all actuator components inside and protects all components inside from the external environment. The actuator housing 2-22 is provided with a window through which information on the display screen 2-21 can be viewed from outside the actuator 2.
The actuator 2 may be of the air-open, air-closed, double-acting type.
The actuator 2 may be a straight stroke, an angular stroke.
The actuator 2 may be a normal temperature type or a low temperature type.
The valve portion 1 may be of the regulating type, the shut-off type.
For the adjustment type straight-stroke pneumatic open type pneumatic control valve, as shown in fig. 1, when an input signal 4-20mA received by an actuating mechanism 2 is increased, a CPU (central processing unit) processor 2-14 outputs an instruction to a piezoelectric valve amplifier 2-7 to control the air inflow entering a membrane chamber 2-8 to be increased, and the pressure in the membrane chamber 2-8 is increased to drive a push rod 2-11 to drive a valve rod to move upwards; meanwhile, the feedback components 2-17 fixed on the push rods 2-11 also generate the same displacement, and the displacement sensors 2-15 convert displacement signals detected by the feedback components 2-17 into electric signals which are fed back to the CPU processors 2-14 through the valve position processing circuits 2-16; meanwhile, the pressure sensors II 2-18 convert the actual pressure value in the diaphragm chamber into electric signals, and the electric signals are processed by the diaphragm chamber pressure processing circuits 2-19 and fed back to the CPU processors 2-14. The pressure sensor I2-4 converts the pressure signal of the input air source into an electric signal which is fed back to the CPU processor 2-14 through the air source pressure processing circuit 2-5.
For the adjustment type straight-stroke pneumatic open type pneumatic control valve, as shown in fig. 1, when an input signal 4-20mA received by an actuating mechanism 2 is reduced, a CPU (central processing unit) processor 2-14 outputs an instruction to a piezoelectric valve amplifier 2-7 to control the exhaust amount of a membrane chamber 2-8 to be increased, the pressure in the membrane chamber 2-8 is reduced, and the counter force of a spring prompts a push rod 2-11 to drive a valve rod to move downwards; meanwhile, the feedback components 2-17 fixed on the push rods 2-11 also generate the same displacement, and the displacement sensors 2-15 convert displacement signals detected by the feedback components 2-17 into electric signals which are fed back to the CPU processors 2-14 through the valve position processing circuits 2-16; meanwhile, the pressure sensors II 2-18 convert the actual pressure values in the membrane chambers 2-8 into electric signals, and the electric signals are processed by the membrane chamber pressure processing circuits 2-19 and fed back to the CPU processors 2-14. The pressure sensor I2-4 converts the pressure signal of the input air source into an electric signal which is fed back to the CPU processor 2-14 through the air source pressure processing circuit 2-5.
The CPU processor 2-14 compares the actual valve position feedback value of the valve from the displacement sensor 2-15 with the set value corresponding to the input signal of the actuating mechanism 2, after deviation is detected, an instruction is output to the piezoelectric valve amplifier 2-7 according to the deviation size and direction, the piezoelectric valve amplifier 2-7 adjusts the air inflow or exhaust amount of the membrane chamber 2-8 according to the instruction, until the actual valve position feedback value of the valve from the displacement sensor 2-15 is not deviated from the set value corresponding to the input signal of the actuating mechanism 2, the CPU processor 2-14 does not output the instruction to the piezoelectric valve amplifier 2-7 any more, and the piezoelectric valve amplifier 2-7 cuts off the air circuit connected with the membrane chamber 2-8, so that the actual valve position of the valve is ensured to be in one-to-one correspondence with the control signal. The CPU processor 2-14 controls the display screen 2-21 to display the actual opening value corresponding to the actual valve position of the valve at the same time.
Claims (3)
1. An integral pneumatic control valve characterized by: comprises a valve part (1), an actuating mechanism (2) and a connecting piece (3);
the actuating mechanism (2) comprises an air source interface (2-1), a pressure reducing valve (2-2), a filter (2-3), a pressure sensor I (2-4), an air source pressure processing circuit (2-5), an oil atomizer (2-6), a piezoelectric valve amplifier (2-7), a membrane chamber (2-8), a membrane (2-9), a spring (2-10), a push rod (2-11), a power supply (2-12), a detection circuit (2-13), a CPU processor (2-14), a displacement sensor (2-15), a valve position processing circuit (2-16), a feedback component (2-17), a pressure sensor II (2-18), a pressure processing circuit (2-19), a power supply wiring terminal (2-20), a display screen (2-21), The actuating mechanism comprises an actuating mechanism shell (2-22), a fastening piece (2-23) and a built-in air passage (2-24);
the actuating mechanism shell (2-22) comprises a lower cover (2-22-1) and an upper cover (2-22-2), the lower cover (2-22-1) and the upper cover (2-22-2) are firmly connected through a fastening piece (2-23), all actuating mechanism parts are installed inside the actuating mechanism shell (2-22) by the actuating mechanism shell (2-22), a push rod (2-11) of the actuating mechanism (2) is firmly connected with a valve rod of the valve portion (1) through a connecting piece (3), and the valve rod of the valve portion (1) is driven by the push rod (2-11) of the actuating mechanism (2) to generate the same axial displacement.
2. The integral pneumatic control valve according to claim 1, wherein: the built-in gas circuit (2-24) is used for communicating the filter (2-3), the pressure reducing valve (2-2), the oil atomizer (2-6), the piezoelectric valve amplifier (2-7) and the membrane chamber (2-8) and providing a gas circuit leading to the membrane chamber (2-8) for an input gas source of the actuating mechanism (2); the built-in gas circuit (2-24) connects the membrane chamber (2-8) and the piezoelectric valve amplifier (2-7) with the atmosphere, provides an exhaust passage for the membrane chamber (2-8), a gas source output end of the pressure reducing valve (2-2) is connected with a gas circuit branch pipe to the pressure sensor I (2-4), the output end of the pressure sensor I (2-4) is connected to a gas source pressure processing circuit (2-5) through a cable, and then is connected to the CPU processor (2-14) through the cable; before an air source enters the membrane chamber (2-8), an air path branch pipe is connected to an output pressure pipeline of the piezoelectric valve amplifier (2-7) to the pressure sensor II (2-18), the output end of the pressure sensor II (2-18) is connected to the membrane chamber pressure processing circuit (2-19) through a cable, and then is connected to the CPU processor (2-14) through the cable.
3. The integral pneumatic control valve according to claim 1, wherein: the membrane (2-9) is supported by the tray and is connected to the push rod (2-11), and the push rod (2-11) can generate corresponding displacement along with the displacement of the membrane (2-9); the feedback component (2-17) is connected with the push rod (2-11) and is mechanically connected with the displacement sensor (2-15); the output end of the displacement sensor (2-15) is connected to the valve position processing circuit (2-16) through a cable, and then is connected to the CPU processor (2-14) through a cable; the power supply (2-12) and the detection circuit (2-13) are connected with the CPU processor (2-14) through cables; the CPU processors (2-14) are connected with the display screens (2-21) through cables; and display screen observation windows are arranged on the execution mechanism shells (2-22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020776495.8U CN212226159U (en) | 2020-05-12 | 2020-05-12 | Integral pneumatic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020776495.8U CN212226159U (en) | 2020-05-12 | 2020-05-12 | Integral pneumatic control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212226159U true CN212226159U (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020776495.8U Active CN212226159U (en) | 2020-05-12 | 2020-05-12 | Integral pneumatic control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212226159U (en) |
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2020
- 2020-05-12 CN CN202020776495.8U patent/CN212226159U/en active Active
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