CN206608600U - The control device that a kind of pneumatic control valve valve positioner is used - Google Patents

Abstract

A control device used for a valve positioner of a pneumatic regulating valve, which consists of a housing, an intake pipe, an exhaust pipe, a nozzle, a first electromagnetic component, a baffle, a limit mechanism, a locking mechanism, a second electromagnetic component, and a first control circuit , second control circuit, voltage regulation circuit, delay circuit, voltage adjustment knob and component box, intake pipe, exhaust pipe, nozzle, first electromagnetic component, baffle plate, limit mechanism, locking mechanism, second electromagnetic component Installed on the casing, the voltage adjusting knob installed on the component box is connected with the first control circuit, the second control circuit, the voltage regulating circuit and the delay circuit installed in the component box through wires. The utility model is applied to industrial production sites such as a pneumatic control valve positioner used for adjusting the output gas flow rate of a thermal power station. When working, the standby current is only 0.4mA, which overcomes the waste of electric energy and the disadvantages of easy damage caused by the electromagnetic components of the control equipment used in the existing valve positioner.

Description

A control device for a valve positioner of a pneumatic control valve

technical field

The utility model relates to matching equipment used for a pneumatic control valve, in particular, the standby current is only about 0.4mA, which saves energy hundreds of times compared with the control equipment used by the existing valve positioner. When working, the internal electromagnetic components are in a power-off state, which overcomes the energy consumption of the internal electromagnetic components of the control equipment used by the existing valve positioner because it is always in the energized state during work, and it is easy to cause damage to the internal electromagnetic components. Pneumatic adjustment A control device used by a valve positioner.

Background technique

Pneumatic control valves are widely used in the adjustment of the output gas flow rate of thermal power stations, as well as other industrial production sites that need to adjust the gas flow and flow rate. The main function of the control equipment used by the pneumatic control valve valve positioner is to change its The distance between the internal nozzle and the baffle can change the air pressure value in the back pressure room of the pneumatic control valve positioner connected in series with the control equipment, and then the back pressure value signal is controlled by other actuators of the valve positioner on the pneumatic control valve. Air flow at the inlet end of the pneumatic regulating valve. In the prior art, the valve positioner control equipment of the electronic and electric type as the main actuator is widely used in the industry because of its fast response speed, high precision and long life compared with the valve positioner control equipment of the mechanical type as the main actuator . However, the existing electronic and electric valve positioner control equipment as the main actuator also has many problems. When working, it relies on the internal electromagnetic components to generate magnetic force, and the internal baffle is attracted for a long time. When the voltage is high, The distance between the sucked-in baffle and the nozzle is close, and when the voltage is low, the relative distance between the sucked-in baffle and the nozzle increases, so as to adjust the value of the back pressure entering the back pressure chamber of the valve positioner of the pneumatic control valve through the nozzle. Since the electromagnetic components are always in the energized state when working, it not only consumes energy (the existing pneumatic control valve valve positioner control equipment is under 24V DC voltage, and the power is generally about 3W when working), but also easily causes electromagnetic damage due to long-term work. damage to components.

Utility model content

In order to overcome the existing electronic and electric valve positioner control equipment as the main actuator, when working, the electromagnetic components are always in the energized state, which causes energy consumption and long-term work is easy to cause damage to the electromagnetic components. The new type provides a standby current of only about 0.4mA, which is hundreds of times more energy-saving than the control equipment used by the existing valve positioner. When working, the internal electromagnetic components are in a power-off state, which overcomes the internal electromagnetic of the control equipment used by the existing valve positioner. Because the components are always in the energized state during work, it not only consumes energy but also easily causes damage to the internal electromagnetic components. It is a control device used by the valve positioner of the pneumatic control valve.

The technical scheme that the utility model solves its technical problem adopts is:

A control device used for a valve positioner of a pneumatic control valve, including a switching power supply transformer with 220V AC power to DC power supply, and two sets of 5V and 24V DC power outputs, characterized in that it consists of a housing, an intake pipe, an exhaust pipe, and a nozzle , the first electromagnetic component, the baffle, the limit mechanism, the locking mechanism, the second electromagnetic component, the first control circuit, the second control circuit, the voltage regulation circuit, the delay circuit, the voltage adjustment knob and the component box. There is an opening with internal thread in the middle part of the inner side. The right part of the air intake pipe is welded to the lower end of the opening in the middle part of the lower inner side of the shell. The left part of the air intake pipe is connected to the air intake pipe on the pneumatic regulating valve through a pipe joint. There is an opening, and a connecting pipe is welded at the outer end of the opening. The connecting pipe is connected to the air inlet pipe of the back pressure chamber of the valve positioner of the pneumatic control valve through a pipe joint, and the upper end of the exhaust pipe is welded to an opening on the lower right side of the housing. Above, screw the external thread of the outer end of the lower part of the nozzle into the inner thread of the opening in the lower inner middle of the housing, and install the nozzle in the lower inner middle of the housing. The first electromagnetic component is composed of an annular silicon steel core and a coil, and the coil is wrapped around On the outer end of the iron core, there is an insulating rubber sleeve around the nozzle. The inner circle of the iron core of the first electromagnetic component is sleeved on the insulating rubber sleeve. There is an opening on the upper right end of the conduit, a nut is welded on the right end of the opening, the upper and lower ends of the guide rod have external threads, the baffle is made of steel, and the middle of the baffle has an opening with internal threads. There is a hole in the middle of the upper cover, through which the external thread at the lower end of the guide rod is screwed into the inner thread of the opening in the middle of the baffle, the lower end of the guide rod is installed on the upper end of the baffle, and the upper cover is welded on the upper part of the guide tube. The upper part of the rod passes through the lower part of the conduit from bottom to top through the hole in the middle of the upper cover plate, the spring A is sleeved on the upper part of the guide rod, the internal thread of the fixing nut is screwed into the external thread of the upper end of the guide rod, and a Only the support frame A, the left and right parts of the two support frames A are welded to the inner, upper, left and right ends of the housing. The locking mechanism is composed of a guide tube, a guide rod, a spring B, a limit ring, a right cover plate and a square fixing plate. There is an opening with internal thread in the middle of the square fixed plate, the square fixed plate is made of steel, the outer end of the left part of the guide tube has external thread, the limit ring is welded on the left part of the guide rod, the right part of the guide rod has external thread, and the right cover There is an opening in the middle of the plate, the right cover plate is welded to the right end of the guide tube, the spring B is set inside the guide tube, the right part of the guide rod penetrates from the left end of the guide tube, passes through the inside of the guide tube from left to right, and passes through the middle of the right cover plate The opening goes out, the internal thread of the opening in the middle of the square fixing plate is screwed into the external thread of the right end of the guide rod, and the external thread of the left outer end of the guide tube is screwed into the internal thread of the opening nut on the right side of the guide tube of the limit mechanism, and the locking mechanism The guide tube is installed on the right side of the guide tube of the limit mechanism, the left ends of the two support frames B are respectively welded to the right end of the upper cover plate of the limit mechanism, the right end of the guide tube, and the right ends of the two support frames B Each of the upper and lower parts has an opening, and the second electromagnetic component is composed of a square silicon steel core and a coil. hole second The middle part of the iron core of the electromagnetic component is opened, and the second electromagnetic component is installed on the right side of the two support frames B with a screw nut. The upper inner end of the ring shell has internal threads, and the outer end of the ring shell cover There are external threads, and the external threads of the outer end of the shell cover are screwed into the internal threads of the upper inner end of the shell, and the shell cover is installed on the upper part of the shell. There is an opening on the right side of the shell, and a " O"-shaped rubber ring, there is an opening in the middle of the upper end of the component box, and numbers between 1 and 10 are marked around the opening, each number represents a certain voltage value output by the voltage regulating circuit, and the voltage adjustment knob is made of copper , the switching power supply transformer and the first control circuit, the second control circuit, the voltage regulating circuit, and the delay circuit are installed in the component box and connected with the first electromagnetic component and the second electromagnetic component through wires, and the connection at the lower end of the voltage adjustment knob The sleeve enters the interior of the component box from the opening in the middle of the upper end of the component box, and the connecting sleeve is inserted into the adjustment handle of the voltage regulating switch of the voltage regulating circuit. There is a strip-shaped protrusion on the upper and lower side of the voltage adjustment knob, and a The bar-shaped protrusion prevents the user from rotating the voltage adjustment knob 360 degrees in actual use to connect the wires between the first control circuit, the second control circuit, the voltage regulation circuit and the coil of the first electromagnetic component and the coil of the second electromagnetic component. The "O" rubber ring on the right opening of the housing enters the housing, and the "O" rubber ring prevents the gas inside the housing from leaking from the right opening of the housing.

When the switching power supply transformer and the first electromagnetic component, the second electromagnetic component, the first control circuit, the second control circuit, the voltage regulating circuit, and the delay circuit are connected by wires, the 24V DC positive power supply of the switching power supply transformer outputs Terminal 4 is connected to the first control circuit control power input terminal and the second control circuit control power input terminal through wires, and the 5V DC positive power output terminal 6 of the switching power supply transformer is connected to the first positive power input end of the delay circuit through wires , the delay circuit control power supply output terminal and the positive power supply input terminal of the first control circuit, the positive power supply input terminal of the second control circuit are connected through wires, the first control circuit control power supply output terminal and the positive power supply input terminal of the second electromagnetic component coil are connected through Wire connection, the second control circuit control power supply output end and the positive power input end of the voltage regulation circuit are connected by wires, the second control circuit positive power output end and the delay circuit second positive power input end are connected by wires, the voltage regulation circuit positive power supply The output terminal and the positive power supply input terminal of the first electromagnetic component coil are connected by a wire, the 24V DC power supply negative output terminal 5 pin of the switching power supply transformer and the negative pole power supply input terminal of the first electromagnetic component coil, and the negative power supply input terminal of the second electromagnetic component coil terminal, the negative power supply input terminal of the voltage regulating circuit is connected by a wire, the 5V DC power supply negative output terminal 7 pin of the switching power supply transformer and the negative power supply input terminal of the first control circuit, the negative power supply input terminal of the second control circuit, and the negative power supply of the delay circuit The input end is connected through a wire, and the voltage adjustment knob is connected with the first control circuit and the control signal input end of the second control circuit through the wire through the coupling ceramic capacitor.

The housing, intake pipe, exhaust pipe, nozzle, limit mechanism and locking mechanism are made of metal, and the component box is made of plastic.

After the first electromagnetic component, the limit mechanism, the baffle, and the nozzle are installed, the gas enters the left part of the intake pipe, the first electromagnetic component is energized, and its annular iron core generates a magnetic force to attract the baffle downward. , the distance between the lower end of the baffle and the upper end of the nozzle is close, and the guide rod on the upper end of the baffle drives the fixed nut on the upper end of the guide rod to overcome the elastic force of the spring A and move downward along the inside of the guide tube. The higher the operating voltage of the first electromagnetic component, the generated magnetic force The stronger the force, the longer the distance that the baffle moves downward, and the closer the distance between the nozzle and the nozzle.

After the second electromagnetic component and the locking mechanism are installed, the coil of the second electromagnetic component is energized to work, the square iron core generates a magnetic force, and the square fixed plate is sucked to the right, and the square fixed plate drives the guide rod to overcome the spring B The elastic force moves to the right along the inside of the guide tube, and the leftmost end of the guide rod and the right end of the guide rod of the limit mechanism are separated from each other, and they are no longer in contact with each other. When the coil of the second electromagnetic component loses power and stops working, it does not Then generate magnetic force, under the elastic force of spring B, the guide rod moves to the left along the inside of the guide tube, and drives the square fixed plate to move to the left, and the leftmost end of the guide rod closely fits with the right end of the guide rod of the limit mechanism , so that the guide rod of the limit mechanism cannot move up and down along the inside of the catheter.

The operating voltage of the coil of the first electromagnetic component is DC 24V, and the power is 3W.

The operating voltage of the coil of the second electromagnetic component is DC 24V, and the power is 1W.

The first control circuit is composed of a time-base integrated circuit, an adjustable resistor, a resistor, an electrolytic capacitor, a ceramic capacitor, an NPN transistor and a relay. Left and right, the 4 pins of the reset terminal of the time base integrated circuit are connected with the 8 pins of the positive power input terminal and the adjustable resistor, and the positive power input terminal of the relay is connected by a wire, the other end of the adjustable resistor is connected with the first resistor by a wire, the time base The threshold terminal 6 pin of the integrated circuit and the discharge terminal 7 pin are connected with the positive pole of the first electrolytic capacitor and the other end of the first resistor through wires, and the control terminal 5 pin of the time base integrated circuit is connected with one end of the ceramic capacitor through wires, and the time base The pin 3 of the output end of the integrated circuit is connected to the base of the NPN triode through a wire, the collector of the NPN triode is connected to the negative power input end of the relay through a wire, and the pin 1 of the negative power input end of the time-base integrated circuit is connected to the negative pole of the electrolytic capacitor and the ceramic capacitor. One end and the emitter of the NPN triode are connected by wires.

The second control circuit is composed of a time-base integrated circuit, an adjustable resistor, a resistor, an electrolytic capacitor, a ceramic capacitor, an NPN transistor and a relay. There are three relays. The model of the time-base integrated circuit is ICM7555, and the time-based integrated circuit works statically The current is about 0.2mA. The 4 pins of the reset terminal of the time base integrated circuit are connected with the 8 pins of the positive power input terminal and the adjustable resistor, the positive power input terminal of the first relay, and the control power input terminal of the first relay through wires. The other end of the adjusting resistor is connected with one end of the resistor through a wire, the threshold terminal 6 of the time base integrated circuit and the discharge end 7 are connected to the positive electrode of the electrolytic capacitor, and the other end of the resistor is connected through a wire, the control terminal 5 of the time base integrated circuit is connected to the ceramic capacitor One end is connected by a wire, the output terminal 3 of the time-base integrated circuit is connected to the base of the NPN transistor by a wire, the collector of the NPN transistor is connected to the negative power input terminal of the first relay by a wire, and the negative power input terminal 1 of the time-base integrated circuit is connected by a wire. The pin is connected to the negative electrode of the electrolytic capacitor, the other end of the ceramic capacitor, the negative power input end of the second relay, and the negative power input end of the third relay through wires, the normally open contact end of the first relay and the positive power input end of the second relay terminal, the third relay positive power supply input terminal, and the third relay control power supply input terminal are connected by wires.

The voltage regulating circuit is composed of a three-terminal adjustable integrated voltage stabilizer and a silicon rectifier diode, a resistor, a voltage regulating switch, an electrolytic capacitor, and a ceramic capacitor. The model of the three-terminal adjustable integrated voltage stabilizer is LM317, and the silicon rectifier diode, There are two electrolytic capacitors and two ceramic capacitors. The voltage regulating switch is an adjustable resistor. One end of the first ceramic capacitor is connected to the negative pole of the first silicon rectifier diode, and the three-terminal adjustable integrated voltage regulator power input terminal is pin 1. Connected by wires, the positive pole of the first electrolytic capacitor is connected with the control terminal 2 of the three-terminal adjustable integrated voltage regulator, one end of the resistor, one end of the voltage regulating switch, and the positive pole of the second silicon rectifier diode is connected by wires, and the three-terminal adjustable integrated voltage regulator Pin 3 of the output terminal of the device is connected to the positive pole of the first silicon rectifier diode, the other end of the resistor, the negative pole of the second silicon rectifier diode, one end of the second ceramic capacitor, and the positive pole of the second electrolytic capacitor through wires. The first ceramic capacitor The other end is connected to the negative pole of the first electrolytic capacitor, the other end of the voltage regulating switch, the other end of the second ceramic capacitor, and the negative pole of the second electrolytic capacitor through wires. The connecting sleeve enters the interior of the component box from the opening in the middle of the upper end of the component box, and the connecting sleeve is inserted into the plastic adjustment handle of the voltage regulating switch.

The delay circuit is composed of a resistor, an NPN triode, an electrolytic capacitor and a relay. There are two resistors and an NPN triode respectively. The other end is connected to the base of the first NPN triode by a wire, the emitter of the first NPN triode is connected to the base of the second NPN triode VT4 by a wire, the collector of the first NPN triode is connected to the collector of the second NPN triode 1. The negative power supply input terminal of the relay is connected by a wire, the negative pole of the electrolytic capacitor and the emitter of the second NPN triode are connected by a wire, and the positive power input terminal of the relay and the control power input terminal are connected by a wire.

The beneficial effects of the utility model are: when in use, when the user rotates the voltage adjustment knob left and right with his hand to control the voltage regulation circuit output to the coil voltage of the first electromagnetic mechanism, since the voltage adjustment knob is made of copper material, the metal part of the voltage adjustment knob It is connected with the control signal input terminals of the first control circuit and the second control circuit. Under the action of the internal circuit of the first control circuit, the coil of the second electromagnetic component will be energized and work for 5 seconds, and then the square fixing plate of the locking mechanism will be energized by the second The magnetic force of the electromagnetic component drives the guide rod to move to the right, the left end of the guide rod is no longer in contact with the guide rod of the limit mechanism, and the guide rod can move up and down freely along the guide tube. When the user rotates the voltage adjustment knob by hand, under the action of the internal circuit of the second control circuit, the voltage regulation circuit and the second positive power supply input terminal of the delay circuit will be energized. After the user rotates the voltage adjustment knob by hand, the voltage regulation circuit The resistance value of the voltage regulating switch will change. Under the action of the internal circuit of the voltage regulating circuit, the voltage output to the coil of the first electromagnetic component will change according to the resistance value of the voltage regulating switch. When the output voltage is high, the first electromagnetic component will generate The greater the magnetic suction, the longer the downward movement of the baffle, and the closer the distance between the lower end of the baffle and the upper end of the nozzle, so that the airflow output to the back pressure chamber of the valve positioner of the pneumatic control valve is smaller; when the output voltage is low, the second electromagnetic The smaller the magnetic attraction generated by the components, the shorter the downward movement distance of the baffle, and the relatively far distance between the lower end of the baffle and the upper end of the nozzle, so that the air flow output to the back pressure chamber of the valve positioner of the pneumatic control valve increases. After 5 seconds, at this moment, the user has adjusted the air flow output to the back pressure chamber of the valve positioner of the pneumatic control valve through the voltage adjustment knob, that is to say, the gas output flow rate at the air pressure output end of the pneumatic control valve has been adjusted according to needs , under the action of the internal circuit of the first control circuit, no more output power enters the coil of the second electromagnetic component, and then, the guide rod of the locking mechanism moves to the left, and the left end of the guide rod contacts the guide rod of the limit mechanism, and the guide rod cannot move along the The catheter moves up and down; under the action of the delay circuit, after 10 seconds, all the circuits return to the initial state, the coil of the first electromagnetic component loses power, and the left end of the guide rod of the locking mechanism is in close contact with the guide rod of the limit mechanism, even if When the coil of the first electromagnetic component loses power, the distance between the nozzle and the baffle will remain at the distance before the power failure. Only when the voltage adjustment knob is operated again next time can the distance between the nozzle and the baffle be changed again through relevant mechanisms. Under the action of the delay circuit, after all the circuits return to the initial state, only the time base integrated circuits of the first control circuit and the second control circuit are in the state of power consumption, and the standby current is only 0.4mA, so it not only saves electric energy, but also prolongs The service life of the first and second electromagnetic components is extended. Based on the above, the present invention has a good application prospect.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a circuit diagram of the utility model.

detailed description

As shown in Fig. 1, a control device used for a valve positioner of a pneumatic control valve includes a switching power supply transformer 1 with 220V AC power to DC power supply, two sets of 5V and 24V DC power outputs, a housing 2, an intake pipe 3 , exhaust pipe 16, nozzle 4, first electromagnetic component 5, baffle plate 6, limit mechanism, locking mechanism, second electromagnetic component 9, first control circuit 10, second control circuit 11, voltage regulating circuit 12, extension The timing circuit 13, the voltage adjustment knob 14 and the component box 15 are formed. There is an opening 2-1 with an internal thread in the lower inner middle of the housing 2, and the right part of the air intake pipe 3 is welded to the lower end of the lower inner middle opening 2-1 of the housing. , the left part of the intake pipe 3 is connected to the intake pipe on the pneumatic regulating valve through a pipe joint, there is an opening at the rear of the housing 2, and a connecting pipe is welded at the outer end of the opening, and the connecting pipe and the pneumatic regulating valve are positioned The inlet pipe of the back pressure chamber of the device is connected by a pipe joint, and the upper end of the exhaust pipe 16 is welded to an opening on the lower right side of the housing 2, and is screwed into the lower inner middle opening 2 of the housing 2 through the external thread at the outer end of the lower part of the nozzle 4. In the internal thread of -1, the nozzle 4 is installed in the middle part of the lower inner side of the housing 2. The first electromagnetic component 5 is composed of an annular silicon steel material iron core and a coil. The coil is wrapped around the outer end of the iron core. An insulating rubber sleeve, the inner circle of the iron core of the first electromagnetic component 5 is sleeved on the insulating rubber sleeve, and the limit mechanism is fixed by a conduit 7-1, a guide rod 7-2, a spring A7-3, an upper cover plate 7-4 and Nut 7-5 is made up of, and the upper right side of conduit 7-1 has an opening, and a nut is welded on the right side end of opening, and the upper and lower ends of guide rod 7-2 have external thread, and baffle plate 6 is steel material, and There is an opening with an internal thread in the middle of the plate 6, and there is an opening in the middle of the upper cover plate 7-4. The external thread at the lower end of the guide rod 7-2 is screwed into the internal thread of the opening in the middle of the baffle plate 6, and the guide The lower end of the rod 7-2 is installed on the upper end of the baffle plate 6, the upper cover plate 7-4 is welded on the upper part of the conduit 7-1, and the upper part of the guide rod 7-2 passes through the lower part of the conduit 7-1 from bottom to top from the middle of the upper cover plate 7-4 The hole goes out, the spring A7-3 is set on the upper part of the guide rod 7-2, the inner thread of the fixing nut 7-5 is screwed into the outer thread of the upper end of the guide rod 7-2, and the left and right sides of the upper cover plate 7-4 are welded There is a support frame A17, and the left and right parts of the two support frames A17 are welded on the inner, upper, left and right ends of the housing 2. The locking mechanism consists of a guide tube 8-1, a guide rod 8-2, a spring B8-3, and a limit ring 8-4, the right cover plate 8-5 and the square fixing plate 8-6, the middle part of the square fixing plate 8-6 has an opening with internal thread, the square fixing plate 8-6 is made of steel, the guide pipe 8-1 The left side outer end has external thread, and limit ring 8-4 is welded on guide rod 8-2 left part, and guide rod 8-2 right part has external thread, and right cover plate 8-5 middle part has an opening, and right cover plate 8-5 is welded on the right end of the guide tube 8-1, the spring B8-3 is set inside the guide tube 8-1, the right part of the guide rod 8-2 is from the left end of the guide tube 8-1 from left to right from the inside of the guide tube 8-1 , Right cover plate 8-5 through the opening in the middle, and the inner thread of the opening in the middle of square fixing plate 8-6 Screw in the external thread of the rightmost end of the guide rod 8-2, screw the external thread of the left outer end of the guide tube 8-1 into the internal thread of the opening nut on the right side of the guide tube 7-1, and put the guide tube 8 of the locking mechanism -1 is installed on the right side of the conduit 7-1 of the limit mechanism, and the left ends of the two support frames B18 are respectively welded on the right side end of the upper cover plate 7-4 of the limit mechanism and the right end of the conduit 7-1. Only the upper and lower parts of the right side of the support frame B18 have an opening respectively. The second electromagnetic component 9 is made up of a square silicon steel material iron core and a coil. The upper and lower parts of the right end are perforated, the middle part of the iron core of the second electromagnetic component 9 is perforated, and the second electromagnetic component 9 is installed on the right ends of the two support frames B17 with a screw nut. The inner end of the upper part of 2 has an internal thread, and the outer end of the ring shell cover 2-1 has an external thread, and the outer thread of the outer end of the shell cover 2-1 is screwed into the inner thread of the upper inner end of the shell 2, and the shell cover 2-1 is installed on the upper part of the housing 2. There is an opening 2-2 on the right side of the housing 2. An "O" rubber ring is set on the opening. There is an opening in the middle of the upper end of the component box 15. The opening There are numbers between 1 and 10 marked around the circle, each number represents a certain voltage value output by the voltage regulating circuit, the voltage regulating knob 14 is made of copper material, the switching power supply transformer 1 and the first control circuit 10, the second control circuit 11 , the voltage regulating circuit 12 and the delay circuit 13 are installed in the component box 15 and are connected with the first electromagnetic component 5 and the second electromagnetic component 9 through wires, and the connecting sleeve at the lower end of the voltage adjustment knob 14 is opened from the middle part of the component box 15 upper ends The hole enters the inside of the component box 15, and the connecting sleeve is inserted into the adjusting handle of the voltage regulating switch of the voltage regulating circuit 12. There is a strip-shaped protrusion 14-1 on the lower side of the upper part of the voltage regulating knob 14, and a The bar-shaped protrusion 15-1 prevents the user from rotating the voltage adjustment knob 14 360 degrees in actual use to connect the first control circuit 10, the second control circuit 11, the voltage regulating circuit 12 and the coil of the first electromagnetic component 5, the second The wires between the coils of the electromagnetic component 9 enter the housing 2 from the "O" rubber ring on the right opening 2-2 of the housing 2, and the "O" rubber ring prevents the gas inside the housing 2 from flowing out of the housing 2. Right opening leaks. The housing 2, the intake pipe 3, the exhaust pipe 16, the nozzle 4, the limiting mechanism and the locking mechanism are made of metal, and the component box 15 is made of plastic. After the first electromagnetic part 5 and the limit mechanism, the baffle plate 6 and the nozzle 4 are installed, the gas enters the left part of the intake pipe 3, and the first electromagnetic part 5 is energized to work its annular iron core to produce a magnetic force, and the baffle plate 6 Suction downward, the distance between the lower end of the baffle plate 6 and the upper end of the nozzle 4 is close, and the guide rod 7-2 at the upper end of the baffle plate 6 drives the fixed nut 7-5 at the upper end of the guide rod to overcome the elastic force of the spring A7-3, and along the guide rod 7-1 As the interior moves downward, the higher the operating voltage of the first electromagnetic component 5 is, the stronger the magnetic force generated is, the longer the downward movement distance of the baffle plate 6 is, and the closer the distance between the baffle plate 6 and the nozzle 4 is. After the second electromagnetic component 9 and the locking mechanism are installed, the coil of the second electromagnetic component 9 is energized and its square iron core produces a magnetic force, and the square fixed plate 8-6 is sucked to the right, and the square fixed plate 8-6 drives The guide rod 8-2 overcomes the elastic force of the spring B8-3 and moves to the right along the inside of the guide tube 8-1. No longer in contact with each other, when the coil of the second electromagnetic component 9 loses power and stops working, it no longer produces magnetic force to suck the square fixed plate 8-6 to the right, and under the elastic force of the spring B8-3, the guide rod 8-6 2 Move to the left along the inside of the guide tube 8-1, and drive the square fixed plate 8-6 to move to the left, the leftmost end of the guide rod 8-2 and the right end of the guide rod 7-2 of the limit mechanism are closely attached, so that the limit The guide rod 7-2 of the positioning mechanism cannot move up and down along the inside of the conduit 7-1.

As shown in Fig. 1, the output power of the 24V DC positive power supply output terminal of the switching power supply transformer 1 enters the first control circuit 10 to control the power supply input terminal, and the second control circuit 11 controls the power supply input terminal; the 5V DC positive pole power supply output of the switching power supply transformer 1 The terminal output power enters the first positive power supply input terminal of the delay circuit 13, and then the delay circuit 13 controls the output terminal of the power supply to output 5V DC power and enters the positive power supply input terminal of the first control circuit 10 and the positive power supply input terminal of the second control circuit 11. When in use, when the air pressure in the back pressure chamber of the pneumatic regulating valve positioner needs to decrease, turn the voltage regulating knob 14 to the right. At this moment, the voltage regulating switch of the voltage regulating circuit 12 at the lower end of the voltage regulating Under the action of the internal circuit of the voltage regulating circuit 12, when the voltage regulating circuit 12 is energized to work, the output voltage will increase; when the air pressure in the back pressure chamber of the pneumatic regulating valve valve positioner needs to increase, turn the voltage regulating knob 14 to the left At this moment, the voltage regulating switch of the voltage regulating circuit 12 at the lower end of the voltage regulating knob 14 turns left thereupon, and under the action of the internal circuit of the voltage regulating circuit 12, when the voltage regulating circuit 12 is energized to work, the output voltage will decrease. When the user operates the voltage regulating switch of the voltage regulating circuit 12 and the human hand touches the voltage regulating knob 14, since the voltage regulating knob 14 is made of copper material, the metal part of the voltage regulating knob 14 and the first control circuit 10 and the second control circuit 11. The control signal input terminal is connected through wires. Under the action of the internal circuit of the first control circuit 10, the output terminal of the first control circuit control power supply will output 24V DC power for 5 seconds and enter the coil of the second electromagnetic component 9. Then, the locking mechanism Square fixed plate 8-6 is driven guide rod 8-2 to move to the right by the magnetic action force of second electromagnetic part 9, and guide rod 8-2 left end no longer contacts with guide rod 7-2 of limit mechanism, and guide rod 7-2 Can freely move up and down along the catheter 7-1. When the user rotates the voltage adjustment knob 14 by hand, under the action of the internal circuit of the second control circuit 11, the output terminal of the second control circuit 11 controls the power supply to output 24V power for 6 seconds, enters the input terminal of the positive power supply of the voltage regulating circuit 12, and outputs 5V The DC power supply enters the second positive power supply input terminal of the delay circuit 13, and under the action of the internal circuit of the voltage regulating circuit 12, the output terminal of the power supply of the voltage regulating circuit 12 outputs the voltage regulation and the power enters the coil of the first electromagnetic component 5, and the first electromagnetic component 5 After the coil is energized, the magnetism produced by the first electromagnetic component 5 will vary according to the voltage value output by the output terminal of the voltage regulating circuit 12 power supply. The greater the magnetic force generated, the longer the downward movement of the baffle 6, and the closer the distance between the lower end of the baffle 6 and the upper end of the nozzle 4, so that the airflow in the back pressure chamber output to the valve positioner of the pneumatic control valve decreases; when the voltage is low, The smaller the magnetic attraction force generated by the first electromagnetic component 5, the smaller the magnetic force generated on the baffle plate 6, the shorter the downward movement distance of the baffle plate 6, and the relatively far distance between the lower end of the baffle plate 6 and the upper end of the nozzle 4, thereby outputting to The air flow in the back pressure chamber of the pneumatic control valve valve positioner increases. After the first control circuit controls the output terminal of the power supply to output power for 5 seconds, at this moment, the user has adjusted the airflow output to the back pressure chamber of the pneumatic control valve valve positioner by adjusting the voltage adjustment knob 14, that is to say, adjust it as needed The gas output flow rate at the air pressure output end of the pneumatic regulating valve is determined. Under the action of the internal circuit of the first control circuit 10, the output power no longer enters the coil of the second electromagnetic component 9, and then the guide rod 8-2 of the locking mechanism moves to the left. The left end of the guide rod 8-2 is in contact with the guide rod 7-2 of the limit mechanism, and the guide rod 7-2 cannot move up and down along the guide tube 7-1; the second control circuit 11 controls the output terminal of the power supply to output a 5V DC power supply and enters the delay circuit 13 After the second positive power supply input terminal 13, under the action of the internal circuit of the delay circuit 13, after 10 seconds, all circuits get back to the initial state, and the first electromagnetic component 5 and the second electromagnetic component 9 all lose power and stop working, but at this moment , the left end of the guide rod 8-2 of the locking mechanism is in close contact with the guide rod 7-2 of the limit mechanism, even if the coil of the first electromagnetic component 5 is de-energized, the distance between the nozzle 4 and the baffle plate 6 will remain at the power-off The distance between the nozzle 4 and the baffle plate 6 can only be changed again by the relevant mechanism if the voltage adjustment knob 14 is operated next time. Under the action of the delay circuit 13, after all the circuits return to the initial state, only the time base integrated circuits of the first control circuit 10 and the second control circuit 11 are in the power consumption state, and the standby current is only 0.4mA. In actual use, since there is a bar-shaped protrusion 14-1 on the lower side of the upper part of the voltage adjustment knob 14, and a bar-shaped protrusion 15-1 is located on the upper right end of the opening of the component box 15, the user rotates the voltage adjustment knob 14 left and right. When it reaches a certain position, the protrusion of the component box 15 will block the protrusion of the voltage adjustment knob 14, preventing the user from rotating the voltage adjustment knob 14 360 degrees, causing the voltage adjustment knob 14, the first control circuit 10, and the second control The wire connected to the circuit 11 is broken.

As shown in FIG. 2 , the operating voltage of the coil DC1 of the first electromagnetic component is 24V DC, and the power is 3W. The working voltage of the coil DC2 of the second electromagnetic component is DC 24V, and the power is 1W. The first control circuit is composed of time base integrated circuit A2, adjustable resistor RP1, resistor R1, electrolytic capacitor C1, ceramic capacitor C2, NPN transistor VT1 and relay J1. The model of time base integrated circuit A2 is ICM7555, and the time base integrated circuit A2 The quiescent working current is about 0.2mA. Pin 4 of the reset terminal of the time-base integrated circuit A2 is connected to pin 8 of the positive power input terminal and one end of the adjustable resistor RP1, and the positive power input terminal of the relay J1 is connected by a wire, and the other end of the adjustable resistor RP1 is connected to the first One end of a resistor R1 is connected by a wire, the threshold terminal 6 pin and the discharge terminal 7 pin of the time base integrated circuit A2 are connected to the positive pole of the first electrolytic capacitor C1, and the other end of the first resistor R1 is connected by a wire, and the time base integrated circuit A2 Pin 5 of the control terminal is connected to one end of the ceramic capacitor C2 through a wire, pin 3 of the output end of the time-base integrated circuit A2 is connected to the base of the NPN transistor VT1 through a wire, and the collector of the NPN transistor VT1 is connected to the negative power input end of the relay J1 through a wire. The negative power supply input terminal 1 pin of the time base integrated circuit A2 is connected with the negative pole of the electrolytic capacitor C1, the other end of the ceramic capacitor C2, and the emitter of the NPN transistor VT1 through wires. The second control circuit is composed of time-base integrated circuit A3, adjustable resistor RP2, resistor R2, electrolytic capacitor C3, ceramic capacitor C4, NPN transistor VT2 and relays J2, J3, and J4. There are three relays, and the model of time-base integrated circuit is A3 It is ICM7555, the quiescent working current of the time base integrated circuit A3 is about 0.2mA, the reset terminal 4 pin of the time base integrated circuit A3 and the positive power supply input terminal 8 pins and one end of the adjustable resistor RP2, the first relay J2 positive power input terminal, The first relay J2 controls the power supply input terminal to be connected by a wire, the other end of the adjustable resistor RP2 is connected to one end of the resistor R2 by a wire, the threshold terminal 6 of the time-base integrated circuit A3 and the discharge terminal 7 are connected to the positive pole of the electrolytic capacitor C3 and the resistor R2 The other end is connected by a wire, the control terminal 5 pin of the time-base integrated circuit A3 is connected with one end of the ceramic capacitor C4 by a wire, the output end 3 pin of the time-base integrated circuit A3 is connected with the base of the NPN transistor VT2 by a wire, and the NPN transistor VT2 is connected by a wire. The electrodes are connected to the negative power supply input terminal of the first relay J2 through wires, the negative power supply input terminal 1 pin of the time base integrated circuit A3 and the negative pole of the electrolytic capacitor C3, the other end of the ceramic capacitor C4, the negative power supply input terminal of the second relay J3, The negative power input terminal of the third relay J4 is connected by a wire, the normally open contact terminal of the first relay J2 and the positive power input terminal of the second relay J3, the positive power input terminal of the third relay J4, and the control of the third relay J4 The power input terminals are connected by wires. The voltage regulating circuit is composed of three-terminal adjustable integrated voltage regulator A4, silicon rectifier diodes VD1, VD2, resistor R3, voltage regulating switch RP3, electrolytic capacitors C6, C8, ceramic capacitors C5, C7, and three-terminal adjustable integrated voltage regulator The model of device A4 is LM317. There are two silicon rectifier diodes, two electrolytic capacitors and two ceramic capacitors. The voltage regulating switch RP3 is an adjustable resistor. The first pin of the power input terminal of the three-terminal adjustable integrated voltage stabilizer A4 is connected by a wire, the positive pole of the first electrolytic capacitor C6 is connected to the second pin of the control terminal of the three-terminal adjustable integrated voltage stabilizer A4, one end of the resistor R3, one end of the voltage regulating switch RP3, The anode of the second silicon rectifier diode VD2 is connected by a wire, the output terminal 3 of the three-terminal adjustable integrated voltage regulator A4 and the positive electrode of the first silicon rectifier diode VD1, the other end of the resistor R3, the second silicon rectifier diode VD2 negative pole, the first silicon rectifier diode VD1 One end of two ceramic capacitors C7 and the positive pole of the second electrolytic capacitor C8 are connected by wires, the other end of the first ceramic capacitor C5 is connected to the negative pole of the first electrolytic capacitor C6, the other end of the voltage regulating switch RP3, and the second ceramic capacitor The other end of C7 and the negative electrode of the second electrolytic capacitor C8 are connected by wires. The adjustment handle of the voltage regulating switch RP3 is made of plastic material. The switch is on the RP3 plastic adjustment handle. The delay circuit is composed of resistors R4, R5, NPN transistors VT3, VT4, electrolytic capacitor C9 and relay J5. There are two resistors and NPN transistors respectively. The first resistor R4 has one end, the second resistor R5 has one end, and the positive electrode of electrolytic capacitor C9 Connected by a wire, the other end of the second resistor R5 is connected to the base of the first NPN transistor VT3 by a wire, the emitter of the first NPN transistor VT3 is connected to the base of the second NPN transistor VT4 by a wire, the first NPN transistor The collector of VT3 is connected to the collector of the second NPN transistor VT4, the negative power input terminal of relay J5 is connected by wire, the negative pole of electrolytic capacitor C9 is connected to the emitter of the second NPN transistor VT4 by wire, the positive power input terminal of relay J5 is connected to the control power input end connection.

As shown in Figure 2, when the switching power supply transformer A1 is connected with the first electromagnetic component, the second electromagnetic component, the first control circuit, the second control circuit, the voltage regulating circuit, and the delay circuit through wires, the switching power supply transformer A1 Pin 4 of the 24V DC positive power supply output terminal is connected with the control power input terminal of the first control circuit relay J1 and the control power input terminal of the second control circuit relay J3 through wires. Switching power supply transformer A1's 5V DC positive power output terminal 6 pins and the delay circuit first positive power input terminal Relay J5 positive power input terminal is connected by wires, the delay circuit controls the power output terminal relay J5 normally closed contact terminal and the first Pin 8 of the time-base integrated circuit A2 at the positive power supply input end of the control circuit and pin 8 of the time-base integrated circuit A3 at the positive power supply input end of the second control circuit are connected through wires. The first control circuit controls the power supply output terminal, the normally open contact terminal of the relay J1 and the positive power supply input terminal of the second electromagnetic component coil DC2 are connected through wires. The second control circuit controls the normally open contact end of the power output terminal relay J3 and the negative pole of the silicon rectifier diode VD1 at the positive pole power input terminal of the voltage regulating circuit is connected through a wire. The second control circuit positive power supply output terminal relay J4 normally open contact terminal is connected with the second positive power supply input terminal resistance R4 of the delay circuit and the other end is connected by a wire. The positive pole of the electrolytic capacitor C8 at the output terminal of the positive power supply of the voltage regulating circuit is connected with the positive pole power supply input terminal of the coil DC1 of the first electromagnetic component through a wire. Switching power supply transformer A1's 24V DC power supply negative output terminal 5 feet and the negative power supply input terminal of the first electromagnetic component coil DC1, the negative pole power supply input terminal of the second electromagnetic component coil DC2, and the negative pole power supply input terminal of the voltage regulating circuit Electrolytic capacitor C6 negative pole Connect by wire. Switching power supply transformer A1's 5V DC power supply negative output terminal 7 pins and the negative pole of the first control circuit negative power supply input terminal electrolytic capacitor C1 negative pole, the second control circuit negative pole power supply input terminal electrolytic capacitor C3 negative pole, the delay circuit negative pole power supply input terminal electrolytic capacitor C9 The negative pole is connected by a wire. The voltage adjusting knob M is connected to pin 2 and pin 2 of the time-base integrated circuit A2 and A3 of the first control circuit and the second control circuit control signal input terminal through the coupling ceramic capacitor C10 through wires.

As shown in Figure 2, after switching power supply transformer A1 is energized to work, its 24V DC positive power output terminal 4-pin output power enters the first control circuit control power input terminal and the second control circuit control power input terminal; its 5V DC positive power supply The output terminal 6-pin output power enters the relay J5 of the delay circuit to control the power supply input terminal and the positive power supply input terminal. Since the relay J5 is in the power-off state at this moment, its control power supply input terminal and the normally closed contact terminal are in the closed state, the first control The circuit, the positive power supply input terminal of the second control circuit and the normally closed contact terminal of the relay J1 are connected by wires, so at this moment, the first control circuit and the second control circuit will be in the energized state. When in use, when the air pressure in the back pressure chamber of the pneumatic control valve positioner needs to decrease, turn the voltage adjustment knob to the right. Under the action of the internal circuit, when the voltage regulating circuit is powered on, the output voltage will increase; when the air pressure in the back pressure chamber of the pneumatic control valve valve positioner needs to increase, turn the voltage adjustment knob to the left. At this moment, the voltage adjustment knob The voltage regulating switch RP3 of the voltage regulating circuit at the lower end turns left accordingly, and under the action of the internal circuit of the voltage regulating circuit, when the voltage regulating circuit is energized to work, the output voltage will decrease. In the first control circuit: usually, the monostable circuit is composed of the time-base integrated circuit A2 and its peripheral components adjustable resistor RP1, resistor R1, and electrolytic capacitor C1. The output terminal 3 of the time-base integrated circuit A2 has no output. The operator adjusts the voltage regulating switch RP3 of the voltage regulating circuit by rotating the voltage regulating knob. The pin 2 of the time base integrated circuit A2 of the circuit is connected, at this moment, the pin 2 of the time base integrated circuit A2 will be triggered, the monostable circuit becomes a temporary stable state, and the 3 pin of the time base integrated circuit A2 outputs a high level and enters the NPN The base of the triode VT1 enters the negative power input terminal of the relay J1 after being amplified by the power of the NPN triode VT1 and inverted, so that the relay J1 is energized to close its control power input terminal and the normally open contact terminal, and then the 24V DC power enters The power supply input terminal of the coil DC2 of the second electromagnetic component, so the coil DC2 of the second electromagnetic component is energized and the second electromagnetic component produces a magnetic force, after 5 seconds (by adjusting the different resistance values of the adjustable resistor RR1, it can be obtained) Different time), the monostable circuit becomes stable, the 3 pin of the time base integrated circuit A2 no longer outputs high level, the relay J1 loses power and stops working; the coil DC2 of the second electromagnetic component is energized and works for 5 seconds Within a time, the square fixed plate of the locking mechanism is driven by the magnetic force of the second electromagnetic component to move the guide rod to the right, the left end of the guide rod no longer contacts the guide rod of the limit mechanism, and the guide rod can move up and down freely along the guide tube. In the second control circuit: usually, the monostable circuit is composed of the time-base integrated circuit A3 and its peripheral components adjustable resistor RP2, resistor R2, and electrolytic capacitor C3. The output terminal 3 of the time-base integrated circuit A3 has no output. The operator adjusts the voltage regulating switch RP3 of the voltage regulating circuit by rotating the voltage regulating knob M. When the human hand touches the voltage regulating knob M, since the voltage regulating knob M is made of copper material, the metal part of the voltage regulating knob M passes through the coupling capacitor C10 and the second The pin 2 of the time base integrated circuit A3 of the control circuit is connected. At this moment, the pin 2 of the time base integrated circuit A3 will be triggered, the monostable circuit becomes a temporary stable state, and the 3 pin of the time base integrated circuit A3 outputs a high level to enter The base of the NPN triode VT2 enters the negative power input terminal of the relay J2 after being amplified by the power of the NPN triode VT2 and inverted, so that the relay J2 is energized and its control power input terminal and the normally open contact end are closed, and then the relay J3 is The control power input terminal and the normally open contact terminal are closed by electric suction, and the control power input terminal and the normally open contact terminal of the relay J4 are electrically closed, and the normally open contact terminal of the relay J3 outputs 24V DC power to enter the voltage regulating circuit , the normally open contact end of relay J4 outputs 5V DC power and enters the second positive power input end of the delay circuit; after 7 seconds (different times can be obtained by adjusting the resistance value of the adjustable resistor RR2), the monostable circuit becomes In a steady state, pin 3 of the time-base integrated circuit A3 no longer outputs high level, and relays J2, J3, and J4 lose power and stop working. In the voltage regulating circuit: when the 24V DC power supply is input, the three-terminal adjustable integrated voltage regulator A4 has silicon rectifier diodes VD1, VD2, resistor R3, voltage regulating switch RP3, electrolytic capacitors C6, C8, and ceramic capacitor C5 in its peripheral components. , Under the action of C7, the output voltage of pin 3 of the three-terminal adjustable integrated voltage regulator A4 can be changed by adjusting the voltage regulating switch RP3, that is, the different resistance values of the adjustable resistor. When the adjustable resistor RP3 is turned to the left, the output voltage value When the adjustable resistor RP3 is rotated to the right, the output voltage value becomes larger; because the user has adjusted the voltage adjustment knob M to the desired position at this moment, that is, the three-terminal adjustable integrated voltage regulator A4 has been selected. 3-pin output voltage value, select the air flow output to the air pressure value in the back pressure room of the pneumatic regulating valve valve positioner, select the gas output flow rate at the air pressure output end of the pneumatic regulating valve, and integrate the regulator A4 through the three-terminal adjustable After voltage regulation, the power supply enters the coil DC1 power input end of the first electromagnetic component from its third pin, so the coil DC1 of the first electromagnetic component is energized to work and the first electromagnetic component generates a magnetic force. After 7 seconds (can be adjusted by adjusting Different resistance values of the resistor RR2 can be adjusted to obtain different times), and the second control circuit changes from a monostable circuit to a steady state, and pin 3 of the time-base integrated circuit A3 no longer outputs a high level, and relays J2, J3, and J4 Stop working when the power is off; within 6 seconds when the coil DC1 of the first electromagnetic component is powered on, when the output voltage of pin 3 of the three-terminal adjustable integrated voltage regulator A4 is high, the magnetic attraction generated by the first electromagnetic component DC1 is greater , the greater the magnetic force on the baffle of the limit mechanism, the longer the downward movement of the baffle, and the closer the distance between the lower end of the baffle and the upper end of the nozzle, so that the airflow output to the back pressure chamber of the pneumatic control valve positioner is reduced, When the voltage is low, the magnetic attraction force generated by the first electromagnetic component DC1 is smaller, the magnetic force on the baffle plate of the limit mechanism is reduced, the downward movement distance of the baffle plate is shorter, and the distance between the lower end of the baffle plate and the upper end of the nozzle is relatively far. As a result, the air flow output to the back pressure chamber of the valve positioner of the pneumatic control valve increases. In the delay circuit: the second control circuit relay J4 is energized and closed, and after the second positive power supply input terminal of the delay circuit is energized to work, the 5V DC power supply will charge the electrolytic capacitor C9 through the resistor R4 for 6 seconds, and the electrolytic capacitor After C9 is fully charged, the Darlington tube composed of NPN transistors VT3 and VT4 obtains a suitable bias current through the resistor R5 and is successively turned on. Then, the relay J5 is energized and its control power input terminal and the normally closed contact terminal are disconnected. , the 5V positive power input terminals of the first and second control circuits and the normally closed contact terminal of relay J5 are connected by wires, so at this time, the 5V positive power input terminals of the first and second control circuits will lose power and stop working, and all circuits will return to normal. After reaching the initial state, the relay J5 will continue to be energized due to the voltage charged on the electrolytic capacitor C9. After about 4 seconds, the voltage charged on the electrolytic capacitor C9 cannot continue to maintain the NPN transistor VT3 and VT4. J5 will lose power and stop working, and its control power input terminal and normally closed contact terminal will be connected again, and the first and second control circuits will be powered and work in a standby state, ready for the user's next use; at this time , only the time base integrated circuits A2 and A3 of the first control circuit and the second control circuit are in the power-on state, and the standby current is only 0.4mA. Through the above, when the user controls the voltage output from the voltage regulating circuit to the first electromagnetic component DC1 by adjusting the voltage adjustment knob M, the coil DC2 of the second electromagnetic component will be powered for 5 seconds, so that the baffle of the limit mechanism can Free to move up and down, the coil DC2 of the first electromagnetic part will be energized and work for 6 seconds, the magnetism generated by the first electromagnetic part will attract the baffle to different strokes according to the voltage, after 6 seconds, the coil DC1 of the first electromagnetic part will be Power-off stops working, because the coil DC2 of the second electromagnetic component loses power and stops working before the coil DC1 of the first electromagnetic component, the guide rod of the locking mechanism and the guide tube of the limit mechanism are in a state of close contact, so the baffle will not Displacement is generated, and the position before power failure is maintained. After 10 seconds, all circuits return to the initial state, ready for the next use. When in standby, the standby current of the whole machine is only 0.4mA, which not only saves electric energy, but also prevents the disadvantage that the coil of the electromagnetic component is always energized and easily caused damage.

Figure 2, in the first control circuit: the specification of adjustable resistor RP1 is 1M; the resistance value of resistor R1 is 91K; the specification of electrolytic capacitor C1 is 4.7μF/25V; the specification of ceramic capacitor C2 is 0.01μF; the model of NPN transistor VT1 is 9013; The model of relay J1 is JZC-23F-4123-DC5V. In the second control circuit: the specification of adjustable resistor RP2 is 1.5M; the resistance value of resistor R2 is 91K; the specification of electrolytic capacitor C3 is 4.7μF/25V; the specification of ceramic capacitor C4 is 0.01μF; the model of NPN transistor VT2 is 9013; the relay J2 , J3, J4 models are JZC-23F-4123-DC6V. In the voltage regulating circuit: the silicon rectifier diode VD1, VD2 type is 1N4002; the resistance value of the resistor R3 is 120Ω; the specification of the voltage regulating switch RP3 is 4.7K; the specification of the electrolytic capacitor C6 is 20μF/25V, and the specification of C8 is 220μF/25V; The C5 specification is 0.1μF, and the C7 specification is 0.1μF. In the delay circuit: the specification of resistor R4 is 1.2M, the specification of R5 is 200K, the models of NPN transistors VT3 and VT4 are 9013, and the specification of electrolytic capacitor C9 is 4.7μF. The specification of coupling ceramic capacitor C10 is 0.01μF.

Claims (8)

1. the control device that a kind of pneumatic control valve valve positioner is used, including 220V AC powers DC power, have The switching mode power supply transformer of two groups of dc sources of 5V, 24V output, it is characterised in that by housing, air inlet pipe, blast pipe, nozzle, the One electromagnetic component, baffle plate, position-limit mechanism, locking mechanism, the second electromagnetic component, first control circuit, second control circuit, pressure regulation Circuit, delay circuit, voltage-regulation knob and subassembly wrapper are constituted, and middle inside has a female perforate of tool under housing, The admission line that air inlet pipe right part is welded on middle inside perforate lower end under housing, air inlet pipe left part and pneumatic control valve passes through Pipe joint is connected, and has a perforate at the rear portion of housing, perforate outer end is welded with a connecting tube, connecting tube and pneumatic regulation The air inlet pipe of valve valve positioner back pressure chamber is connected by pipe joint, and blast pipe upper end is welded on right-hand end one under housing and opened Kong Shang, by screwing under housing in the internal thread of middle inside perforate for nozzle lower outside end, is arranged on nozzle Middle inside under housing, the first electromagnetic component is made up of annular silicon steel material iron core and coil, coil encircling on iron core outer end, An insulating gum cover is cased with around nozzle, the iron core inner circle of the first electromagnetic component is enclosed on insulating gum cover, position-limit mechanism by There are a perforate, the welding of perforate right-hand end in conduit, guide rod, spring A, upper cover plate and fixing nut composition, the right side upper end of conduit There is a nut, the upper and lower ends of guide rod have external screw thread, and baffle plate is that have to have an internal thread in the middle part of iron and steel material quality, baffle plate Perforate, have a perforate in the middle part of upper cover plate, by the internal thread for screwing into perforate in the middle part of baffle plate of lower end of the guide rod, Lower end of the guide rod is arranged on baffle plate upper end, and upper cover plate is welded on the top of conduit, and guide rod top is through conduit bottom from the bottom to top from upper Perforate is passed in the middle part of cover plate, and spring A is enclosed on guide rod top, and the internal thread of fixing nut screws in the external screw thread of guide rod upper end, upper lid Plate left and right sides end be respectively welded with support frame an A, two support frame A left and right two be welded on housing it is interior it is upper left and right two End, locking mechanism is made up of guide pipe, guide rod, spring B, spacing collar, right cover plate and square fixed plate, in the middle part of square fixed plate There is a female perforate of tool, square fixed plate is iron and steel material quality, and guide pipe left part outboard end has external screw thread, spacing collar Guide rod left part is welded on, guide rod right part, which has in the middle part of external screw thread, right cover plate, a perforate, and right cover plate weld is in guide pipe Right-hand member, spring B is enclosed on inside guide pipe, and guide rod right part is from guide pipe left end from left to right from inside guide pipe, in right cover plate Portion's perforate is passed, and the internal thread of perforate screws in guide rod right-hand member external screw thread in the middle part of square fixed plate, by the outside of guide pipe left part End is screwed on the right side of position-limit mechanism conduit in the internal thread of perforate nut, and the guide pipe of locking mechanism is arranged on position restrainer On the right side of the conduit of structure, two support frame B left-hand end is respectively welded at the upper cover plate right-hand end of position-limit mechanism, conduit right-hand end, Two support frame B upper and lower two of right-hand end respectively has a perforate, and the second electromagnetic component is by square silicon steel material iron core and coil Composition, coil encircling is on iron core outer end, by upper and lower two perforates of two support frame B right-hand end, the second electromagnetic component On perforate in the middle part of iron core, the right-hand end that the second electromagnetic component is arranged on to two support frame B with a bolt and nut, toroidal shell body There is internal thread at upper inner end, and the outboard end of ring case lid has external screw thread, and housing is screwed into by the outboard end of case lid Case lid, is arranged on housing upper, the right part of housing has is cased with one in a perforate, perforate by the internal thread at upper inner end " O " type rubber ring, the upper center of subassembly wrapper has a perforate, and the surrounding of perforate is labeled with the numeral between 1 to 10, per number Word represents the certain voltage value of regulating circuit output, and voltage-regulation knob is copper material, switching mode power supply transformer and the first control Circuit processed, second control circuit, regulating circuit, delay circuit are arranged in subassembly wrapper and and the first electromagnetic component, the second electromagnetism Connected between part by wire, the adapter sleeve of voltage-regulation knob lower end enters in subassembly wrapper from the perforate of subassembly wrapper upper center On portion, the tap changer release handle of adapter sleeve insertion regulating circuit, there is a strip bulge on the downside of voltage-regulation knob top, The upper right-hand member of subassembly wrapper perforate has a strip bulge, when preventing actual use, 360 degree of rotational voltage adjusting knobs of user, Between connection first control circuit, second control circuit, regulating circuit and the first electromagnetic component coil, the second electromagnetic component coil Wire enter from " O " the type rubber ring in housing right part perforate in housing, " O " type rubber ring prevent the gas of enclosure interior from The right perforate leakage of housing.

2. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that open Close power transformer and the first electromagnetic component, the second electromagnetic component, first control circuit, second control circuit, regulating circuit, prolong When circuit between when being connected by wire, the pin of 24V direct-flow positive poles power output end 4 of switching mode power supply transformer and the first control electricity Road control power input, the second control electric control power input are connected by wire, the 5V direct currents of switching mode power supply transformer The pin of cathode power supply output end 6 and delay circuit the first cathode power supply input are connected by wire, and delay circuit control power supply is defeated Go out end and first control circuit cathode power supply input, second control circuit cathode power supply input are connected by wire, first The cathode power supply input of control circuit control power output end and the second electromagnetic component coil is connected by wire, the second control Circuit controls power output end and regulating circuit cathode power supply input to be connected by wire, and second control circuit cathode power supply is defeated Go out end and delay circuit the second cathode power supply input is connected by wire, regulating circuit cathode power supply output end and the first electromagnetism The cathode power supply input of member coils is connected by wire, the pin of 24V DC power cathodes output end 5 of switching mode power supply transformer Negative power supply input, negative power supply input, the regulating circuit of the second electromagnetic component coil with the first electromagnetic component coil Negative power supply input connected by wire, the pin of 5V DC power cathodes output end 7 of switching mode power supply transformer and first control Circuit negative power supply input processed, second control circuit negative power supply input, delay circuit negative power supply input are by leading Line is connected, and the coupled ceramic disc capacitor of voltage-regulation knob passes through wire and first control circuit, second control circuit control signal Input is connected.

3. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that the After one electromagnetic component and position-limit mechanism, baffle plate, nozzle are installed, enter gas, the first electromagnetic component in air inlet pipe left part and obtain electric Work its annular core generation magnetic action power, and baffle plate is inhaled downwards, and baffle plate lower end and upper end of nozzle distance are close, baffle plate upper end Guide rod drive the fixing nut of guide rod upper end to overcome spring A elastic acting force, moved downward along catheter interior, the first electromagnetism Component working voltage is higher, and the distance that the stronger baffle plate of magnetic action power of generation is moved downward is longer, between nozzle away from From closer to.

4. the control device that a kind of pneumatic control valve valve positioner according to claim 3 is used, it is characterised in that the After two electromagnetic components and locking mechanism are installed, obtain electric work its square core generation magnetic in the coil of the second electromagnetic component and make Firmly, square fixed plate is inhaled to the right, square fixed plate drive guide rod overcomes the elastic acting force of spring B, along along guide pipe Portion moves right, and the guide rod right-hand end of guide rod high order end and position-limit mechanism spaces out, and no longer contacts each other, when the second electromagnetism The coil losing electricity of part is stopped, and it no longer produces magnetic action power and square fixed plate is inhaled to the right, in spring B elastic reaction Under power, guide rod is moved to the left along inside guide pipe, and drives square fixed plate to left movement, guide rod high order end and position restrainer The guide rod right-hand end of structure is brought into close contact, and prevents the guide rod of position-limit mechanism from being moved up and down along catheter interior.

5. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that the One control circuit is by time-base integrated circuit, adjustable resistance, resistance, electrochemical capacitor, ceramic disc capacitor, NPN triode and relay group Into time-base integrated circuit model is ICM7555, and time-base integrated circuit static working current is 0.2mA or so, time-base integrated circuit The pin of reset terminal 4 connected with the pin of cathode power supply input 8 and adjustable resistance one end, relay cathode power supply input by wire Connect, the adjustable resistance other end and first resistance one end are connected by wire, the pin of threshold value end 6 and discharge end of time-base integrated circuit 7 pin and first electrochemical capacitor positive pole, first resistance other end are connected by wire, the pin of control end 5 of time-base integrated circuit Connected with ceramic disc capacitor one end by wire, the pin of output end 3 and NPN triode base stage of time-base integrated circuit are connected by wire Connect, NPN triode colelctor electrode and relay negative power supply input are connected by wire, and the negative power supply of time-base integrated circuit is defeated Enter 1 pin of end and electrochemical capacitor negative pole, the ceramic disc capacitor other end, NPN triode emitter stage are connected by wire.

6. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that the Two control circuits are by time-base integrated circuit, adjustable resistance, resistance, electrochemical capacitor, ceramic disc capacitor, NPN triode and relay group Into relay has three, and time-base integrated circuit model is ICM7555, and time-base integrated circuit static working current is 0.2mA left The right side, the pin of reset terminal 4 and the pin of cathode power supply input 8 and adjustable resistance one end, the first relay positive pole of time-base integrated circuit Power input, first power source for relay control input are connected by wire, and the adjustable resistance other end and resistance one end are logical Wire connection is crossed, the pin of threshold value end 6 and the pin of discharge end 7 and electrochemical capacitor positive pole of time-base integrated circuit, the resistance other end are by leading Line is connected, and the pin of control end 5 of time-base integrated circuit and ceramic disc capacitor one end are connected by wire, the output end of time-base integrated circuit 3 pin and NPN triode base stage are connected by wire, and NPN triode colelctor electrode and first relay negative power supply input lead to Cross wire connection, the pin of negative power supply input 1 and electrochemical capacitor negative pole of time-base integrated circuit, the ceramic disc capacitor other end, second Relay negative power supply input, the 3rd relay negative power supply input are connected by wire, and first relay is normal Open tip side and second relay cathode power supply input, the 3rd relay cathode power supply input, the 3rd relay Control power input is connected by wire.

7. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that adjust Volt circuit is made up of three-end adjustable integrated voltage stabilizer and silicon rectifier diode, resistance, tap changer, electrochemical capacitor, ceramic disc capacitor, Three-end adjustable integrated voltage stabilizer model is LM317, and silicon rectifier diode, electrochemical capacitor, ceramic disc capacitor respectively have two, tap changer It is an adjustable resistance, first ceramic disc capacitor one end and first silicon rectifier diode negative pole, three-end adjustable integrated voltage stabilizer The pin of power input 1 is connected by wire, first electrochemical capacitor positive pole and the pin of three-end adjustable integrated voltage stabilizer control end 2, electricity Resistance one end, tap changer one end, second silicon rectifier diode positive pole are connected by wire, three-end adjustable integrated voltage stabilizer output Hold 3 pin and first silicon rectifier diode positive pole, the resistance other end, second silicon rectifier diode negative pole, second ceramics electricity Hold one end, second electrochemical capacitor positive pole to connect by wire, first ceramic disc capacitor other end and first electrochemical capacitor are born Pole, the tap changer other end, second the ceramic disc capacitor other end, second electrochemical capacitor negative pole are connected by wire, and pressure regulation is opened The regulation handle of pass is plastic material, and the adapter sleeve of voltage-regulation knob lower end enters subassembly wrapper from subassembly wrapper upper center perforate In inside, adapter sleeve insertion tap changer plastic material regulation handle.

8. the control device that a kind of pneumatic control valve valve positioner according to claim 1 is used, it is characterised in that prolong When electric routing resistance, NPN triode, electrochemical capacitor with relay group into resistance and NPN triode respectively have two, first electricity Resistance one end and second resistance one end, electrochemical capacitor positive pole are connected by wire, second resistance other end and first NPN tri- Pole pipe base stage is connected by wire, and first NPN triode emitter stage and second pole VT4 base stage of NPN tri- are connected by wire, First NPN triode colelctor electrode and second NPN triode colelctor electrode, relay negative power supply input are connected by wire Connect, electrochemical capacitor negative pole and second NPN triode emitter stage are connected by wire, relay cathode power supply input and control Power input is connected by wire.