CN113294573A - Intelligent control gas pressure regulator and use method thereof - Google Patents
Intelligent control gas pressure regulator and use method thereof Download PDFInfo
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- CN113294573A CN113294573A CN202110707987.0A CN202110707987A CN113294573A CN 113294573 A CN113294573 A CN 113294573A CN 202110707987 A CN202110707987 A CN 202110707987A CN 113294573 A CN113294573 A CN 113294573A
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- pressure
- adjusting
- spring
- screw nut
- servo motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
- F16K31/1264—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded with means to allow the side on which the springs are positioned to be altered
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention belongs to the technical field of fuel gas transmission and distribution equipment, and discloses an intelligent control fuel gas pressure regulator and a use method thereof. The main technical characteristics are as follows: the adjustable valve comprises a shell, wherein the shell is provided with an air inlet, an air outlet, a valve port, a valve rod, a movable valve, an adjusting cavity with a spring sleeve, an adjusting diaphragm with a tray and an adjusting spring, a servo motor is arranged on the spring sleeve, a spline shaft is arranged on the servo motor, an adjusting rod is arranged in the spring sleeve, a spline sleeve is arranged at the top end of the adjusting rod, the bottom end of the adjusting rod is connected with a connecting nut, a lead screw nut is in threaded connection with the upper portion of the adjusting rod, a nut of the lead screw nut is oval, a pressure plate is arranged on the adjusting spring, the pressure plate is provided with a longitudinal oval groove, a transverse oval groove and a fin, the spring sleeve is provided with a limiting guide strip, and the limiting guide strip is provided with a limiting plate. The intelligent control gas pressure regulator realizes intelligent remote control, has abnormity and can perform correction action or cut-off action.
Description
Technical Field
The invention belongs to the technical field of fuel gas transmission and distribution equipment, and particularly relates to an intelligent control fuel gas pressure regulator and a use method thereof.
Background
The gas pressure regulator is specially suitable for gas transmission and distribution system as gas pressure regulating equipment for regulating pressure and stabilizing pressure, and is widely applied to gas transmission and distribution engineering. The pressure regulating device has the function of automatically regulating the pressure of the gas outlet, so that the gas outlet is stabilized in a certain pressure range, the pressure value required by a user is met, and the use requirement is met. The gas pressure regulator used at present structurally comprises a shell with an air inlet and an air outlet, a valve port and a valve rod are arranged in the shell, a movable valve matched with the valve port is arranged at the bottom end of the valve rod, an adjusting cavity with a spring sleeve is arranged at the upper end of the shell, an adjusting diaphragm with a tray is arranged in the adjusting cavity, the top end of the valve rod is connected with the tray, a spring seat and an adjusting spring extending into the spring sleeve are arranged on the tray, and an adjusting nut is arranged on the adjusting spring. When the pressure regulator works normally, the force of the regulating spring acting on the regulating diaphragm from the top and the force of the pressure of the air outlet acting on the regulating diaphragm from the bottom are balanced, the valve rod is static, and the valve port is in a normal opening state. When the pressure of the air outlet rises, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is increased, the adjusting diaphragm drives the tray to move upwards to compress the adjusting spring, the tray moves upwards to drive the valve rod to move upwards, the valve rod drives the valve to move upwards, the gap between the valve and the valve port is reduced, the gas throughput is reduced, the pressure of the air outlet is reduced and recovered to a normal value, and therefore normal air supply is maintained. When the pressure of the air outlet is reduced, the force applied to the adjusting diaphragm from the lower part of the pressure of the air outlet is reduced, the adjusting diaphragm drives the tray to move downwards, the adjusting spring is elastically stretched, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the movable valve to move downwards, the gap between the movable valve and the valve port is enlarged, the gas throughput is increased, the pressure of the air outlet is increased to restore to a normal value, and therefore normal air supply is maintained. Although the gas pressure regulator has good pressure regulating effect, the gas pressure regulator can not be intelligently and remotely controlled and is limited in use.
Disclosure of Invention
The invention aims to solve the first technical problem of providing an intelligent control gas pressure regulator capable of being intelligently and remotely controlled.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the device comprises a shell with an air inlet and an air outlet, wherein a valve port and a valve rod are arranged in the shell, a movable valve matched with the valve port is arranged at the bottom end of the valve rod, an adjusting cavity with a spring sleeve is arranged at the upper end of the shell, an adjusting diaphragm with a tray is arranged in the adjusting cavity, the top end of the valve rod is connected with the tray, a spring seat and an adjusting spring extending into the spring sleeve are arranged on the tray, a servo motor with a terminal box is arranged on the spring sleeve, the terminal box is connected with a central processing unit, a spline shaft is arranged at the bottom of the servo motor, an adjusting rod is arranged in the spring sleeve, a spline sleeve matched with the spline shaft is arranged at the top end of the adjusting rod, the bottom end of the adjusting rod is connected with a connecting nut arranged on the spring seat, a connecting rod and a chassis are arranged at the bottom end of the adjusting rod, a guide groove matched with the connecting nut is arranged at the upper part of the connecting nut, a clamping groove matched with the chassis is arranged at the middle part of the connecting nut, adjust pole upper portion threaded connection and have screw nut, screw nut's nut is oval, be provided with above the regulating spring with screw nut assorted pressure disk, the pressure disk is provided with the nut assorted vertical elliptical trough with screw nut, horizontal elliptical trough, vertical elliptical trough sets up on pressure disk upper portion, the pressure disk runs through from top to bottom in horizontal elliptical trough, the outer wall symmetry of pressure disk is provided with a pair of fin, the inner wall symmetry of spring sleeve is provided with a pair of and the spacing gib block of fin assorted, the top of spacing gib block is provided with fin assorted limiting plate.
The additional technical characteristics are as follows: the bottom of the servo motor is provided with a connecting disc and a connecting large nut which are matched with the spring sleeve;
the shell is provided with a position display device, an upper limiting proximity switch is arranged at the position of a spring sleeve at the upper end of the limiting guide strip, a lower limiting proximity switch is arranged at the position of a spring sleeve at the lower end of the limiting guide strip, and the position display device, the upper limiting proximity switch and the lower limiting proximity switch are connected with the central processing unit.
The second technical problem to be solved by the invention is to provide a use method of the intelligent control gas pressure regulator.
In order to solve the technical problem, the technical scheme adopted by the invention comprises the following steps:
first step of normal operation
Firstly, inputting various set values to a central processing unit; when the pressure regulating device starts to work, pressure regulation is firstly carried out on the regulating spring, the central processing unit sends a control command to the servo motor, and the servo motor starts the pressure regulation work of the regulating spring; the servo motor is started to drive the spline shaft to rotate anticlockwise, the spline shaft rotates anticlockwise to drive the spline sleeve to rotate anticlockwise together, the spline sleeve drives the adjusting rod to rotate anticlockwise together, the adjusting rod is in threaded connection with the lead screw nut, the lead screw nut is driven to move downwards by the anticlockwise rotation of the adjusting rod, the lead screw nut drives the pressure plate to move downwards together because the nut of the lead screw nut is positioned in the longitudinal elliptical groove of the pressure plate, the pressure plate compresses the adjusting spring downwards, after the adjusting spring reaches a required value of outlet pressure, the central processor issues a control instruction to the servo motor, and the servo motor stops working; after the pressure of the adjusting spring is adjusted, the pressure regulator works normally; when the pressure regulator works normally, the force of the regulating spring acting on the regulating diaphragm from the top and the force of the pressure of the air outlet acting on the regulating diaphragm from the bottom are balanced, the valve rod is static, and the valve port is in a normal open state; when the pressure of the air outlet rises, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is increased, the adjusting diaphragm drives the tray to move upwards to compress the adjusting spring, the tray moves upwards to drive the valve rod to move upwards, the valve rod drives the movable valve to move upwards, the gap between the movable valve and the valve port is reduced, the gas throughput is reduced, the pressure of the air outlet is reduced and recovered to a normal value, and therefore normal air supply is maintained; when the pressure of the air outlet is reduced, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is reduced, the adjusting diaphragm drives the tray to move downwards, the adjusting spring elastically extends, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the movable valve to move downwards, the gap between the movable valve and the valve port is enlarged, the gas throughput is increased, the pressure of the air outlet is increased to restore to a normal value, and therefore normal air supply is maintained; in the pressure regulating process, when the regulating diaphragm drives the tray to move up and down, the regulating rod moves up and down along with the regulating diaphragm, and the spline sleeve moves up and down along the spline shaft when the regulating rod moves up and down;
second step of correction work
When the pressure regulator fails or exceeds a set value, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit sends a control command to the servo motor, and the servo motor is started to carry out correction work; the servo motor is started to drive the spline shaft to rotate anticlockwise, the spline shaft rotates anticlockwise to drive the spline sleeve to rotate anticlockwise together, the spline sleeve drives the adjusting rod to rotate anticlockwise together, the adjusting rod is in threaded connection with the lead screw nut, the adjusting rod rotates anticlockwise to drive the lead screw nut to move downwards, the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the lead screw nut drives the pressure plate to move downwards together, the pressure plate compresses the adjusting spring downwards, the force of the adjusting spring acting on the adjusting diaphragm from the top is increased, the adjusting diaphragm drives the tray to move downwards, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the valve rod to move downwards, the gap between the valve and the valve port is increased, the gas throughput is increased, the pressure of the gas outlet is increased to a normal value, and normal gas supply is maintained; after normal output, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to a central processing unit, the central processing unit sends a control instruction to a servo motor, and the servo motor stops correcting; when the screw nut drives the pressure plate, the fins on the outer wall of the pressure plate are in contact with the limiting guide strips on the inner wall of the spring sleeve, so that the screw nut and the pressure plate are prevented from rotating anticlockwise along with the adjusting rod, and the screw nut is ensured to drive the pressure plate to move downwards;
third step of cutting-off work
When the correction work cannot realize a normal output value, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to a central processing unit, the central processing unit sends a control command to a servo motor, and the servo motor is started to drive the spline shaft to rotate clockwise; the spline shaft rotates clockwise to drive the spline sleeve to rotate clockwise, the spline sleeve drives the adjusting rod to rotate clockwise, the adjusting rod is in threaded connection with the lead screw nut, the lead screw nut is driven to move upwards by the clockwise rotation of the adjusting rod, the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upwards along with the lead screw nut under the action of the adjusting spring, the top surface of the pressure plate fin is in contact with the limiting plate at the top of the limiting guide strip, the limiting plate blocks the pressure plate to move upwards through the pressure plate fin, the pressure plate is limited, meanwhile, the longitudinal elliptical groove of the pressure plate limits the nut of the lead screw nut, the lead screw nut is positioned, the adjusting rod rotates upwards by taking the lead screw nut as a fulcrum, the spline sleeve moves upwards along the spline shaft when the adjusting rod moves upwards, the adjusting rod moves upwards to drive the connecting nut to move upwards, the connecting nut moves upwards to drive the spring seat, the spring seat, The tray and the adjusting diaphragm move upwards, the tray moves upwards to drive the valve rod to move upwards, the valve rod moves upwards to drive the valve to move upwards, and the valve port is closed by the valve to play a role in cutting off; after the valve port is closed, the pressure sensor, the flowmeter and the like on the pipeline transmit signals to the central processing unit, the central processing unit issues a control command to the servo motor, and the servo motor stops working.
According to the intelligent control gas pressure regulator provided by the invention, the connecting nut is arranged on the spring seat, when the intelligent control gas pressure regulator is assembled, the connecting rod and the chassis at the bottom end of the adjusting rod are respectively pushed into the guide groove at the upper part of the connecting nut and the clamping groove at the middle part of the connecting nut in an aligning manner, the connecting rod of the adjusting rod enters the guide groove at the upper part of the connecting nut, the chassis of the adjusting rod enters the clamping groove at the middle part of the connecting nut, and the adjusting rod is vertically connected with the connecting nut. Set up the pressure disk above adjusting spring, adjust pole upper portion threaded connection screw nut, set up screw nut's oval nut at the vertical elliptical trough of pressure disk, the fin of pressure disk and the spacing gib block contact at spring sleeve inner wall, the top surface of pressure disk fin and the limiting plate contact at spacing gib block top. The servo motor is arranged on the spring sleeve, the spline shaft at the bottom of the servo motor is inserted into the spline sleeve at the top end of the adjusting rod, and the terminal box is connected with the central processing unit.
The intelligent control gas pressure regulator provided by the invention firstly inputs various set values to the central processing unit. When the pressure regulating device starts to work, pressure regulation is firstly carried out on the regulating spring, the central processing unit issues a control command to the servo motor, and the servo motor starts pressure regulation work of the regulating spring. Servo motor starts to drive integral key shaft anticlockwise rotation, integral key shaft anticlockwise rotation drives the spline housing anticlockwise rotation together, the spline housing drives to adjust the pole anticlockwise rotation together, because adjust pole and screw-nut threaded connection, it drives screw-nut downstream to adjust pole anticlockwise rotation, because screw-nut's nut is located the vertical elliptical trough of pressure disk, screw-nut drives the pressure disk downstream together, the pressure disk compresses regulating spring downwards, after regulating spring reached the required value of export pressure, central processing unit assigns control command to servo motor, servo motor stop work. And after the pressure of the adjusting spring is adjusted, the pressure regulator works normally. When the pressure regulator works normally, the force of the regulating spring acting on the regulating diaphragm from the top and the force of the pressure of the air outlet acting on the regulating diaphragm from the bottom are balanced, the valve rod is static, and the valve port is in a normal opening state. When the pressure of the air outlet rises, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is increased, the adjusting diaphragm drives the tray to move upwards to compress the adjusting spring, the tray moves upwards to drive the valve rod to move upwards, the valve rod drives the valve to move upwards, the gap between the valve and the valve port is reduced, the gas throughput is reduced, the pressure of the air outlet is reduced and recovered to a normal value, and therefore normal air supply is maintained. When the pressure of the air outlet is reduced, the force applied to the adjusting diaphragm from the lower part of the pressure of the air outlet is reduced, the adjusting diaphragm drives the tray to move downwards, the adjusting spring is elastically stretched, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the movable valve to move downwards, the gap between the movable valve and the valve port is enlarged, the gas throughput is increased, the pressure of the air outlet is increased to restore to a normal value, and therefore normal air supply is maintained. In the pressure regulating process, when the regulating membrane drives the tray to move up and down, the regulating rod moves up and down along with the regulating membrane, and the spline sleeve moves up and down along the spline shaft when the regulating rod moves up and down.
When the pressure regulator is in fault or exceeds a set value, the pressure sensor, the flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit sends a control command to the servo motor, and the servo motor is started to carry out correction work. The servo motor starts to drive the spline shaft to rotate anticlockwise, the spline shaft rotates anticlockwise to drive the spline sleeve to rotate anticlockwise together, the spline sleeve drives the adjusting rod to rotate anticlockwise together, due to the fact that the adjusting rod is in threaded connection with the lead screw nut, the adjusting rod rotates anticlockwise to drive the lead screw nut to move downwards, due to the fact that a nut of the lead screw nut is located in a longitudinal elliptical groove of the pressure plate, the lead screw nut drives the pressure plate to move downwards together, the pressure plate compresses the adjusting spring downwards, the force of the adjusting spring acting on the adjusting diaphragm from the top is increased, the adjusting diaphragm drives the tray to move downwards, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the valve to move downwards, the valve and the valve port gap are increased, the gas throughput is increased, the pressure of the gas outlet is enabled to recover to a normal value, and normal gas supply is maintained. After normal output, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit issues a control instruction to the servo motor, and the servo motor stops correcting. When screw nut drives the pressure disk, the fin of the outer wall of pressure disk contacts with the spacing gib block of the telescopic inner wall of spring, prevents that screw nut, pressure disk from along with adjusting the pole anticlockwise rotation together, ensures that screw nut drives the pressure disk and moves down.
When the normal output value can not be realized in the correction work, the pressure sensor, the flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit issues a control command to the servo motor, and the servo motor is started to drive the spline shaft to rotate clockwise. The spline shaft rotates clockwise to drive the spline sleeve to rotate clockwise, the spline sleeve drives the adjusting rod to rotate clockwise, the adjusting rod is in threaded connection with the lead screw nut, the lead screw nut is driven to move upwards by the clockwise rotation of the adjusting rod, the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upwards along with the lead screw nut under the action of the adjusting spring, the top surface of the pressure plate fin is in contact with the limiting plate at the top of the limiting guide strip, the limiting plate blocks the pressure plate to move upwards through the pressure plate fin, the pressure plate is limited, meanwhile, the longitudinal elliptical groove of the pressure plate limits the nut of the lead screw nut, the lead screw nut is positioned, the adjusting rod rotates upwards by taking the lead screw nut as a fulcrum, the spline sleeve moves upwards along the spline shaft when the adjusting rod moves upwards, the adjusting rod moves upwards to drive the connecting nut to move upwards, the connecting nut moves upwards to drive the spring seat, the spring seat, Tray, regulation diaphragm rebound, tray rebound drive valve rod rebound, valve rod rebound drive valve rebound, the valve closes the valve port, plays the shut-off action. After the valve port is closed, the pressure sensor, the flowmeter and the like on the pipeline transmit signals to the central processing unit, the central processing unit issues a control command to the servo motor, and the servo motor stops working.
The bottom of the servo motor is provided with a connecting disc matched with the spring sleeve and a large connecting nut, so that the servo motor and the spring sleeve can be quickly connected and detached. The shell is provided with a position display device which can observe the operation switching value of the gas pressure regulator at any time. The spring sleeve department of spacing gib block upper end is provided with spacing proximity switch, and spring sleeve department of spacing gib block lower extreme is provided with spacing proximity switch down, monitors setting device in the spring sleeve, realizes functions such as the automatic alarm suggestion of equipment and safe back journey, provides the multilayer safety guarantee to equipment safe operation.
When the adjusting spring needs to be replaced, the connecting large nut is unscrewed to take down the servo motor, then the pressure plate is pressed downwards to separate the nut of the screw nut from the longitudinal elliptical groove of the pressure plate, the pressure plate is rotated by 90 degrees to align the transverse elliptical groove of the pressure plate with the nut of the screw nut, the pressure plate is loosened, the pressure plate moves upwards under the action of the adjusting spring, the transverse elliptical groove of the pressure plate upwards passes through the nut of the screw nut, the top of the adjusting spring reaches the upper surface of the screw nut, the pressure plate and the adjusting spring are taken out to replace the new adjusting spring, the new adjusting spring is placed on the spring seat, the pressure plate is placed on the new adjusting spring to align the transverse elliptical groove of the pressure plate with the nut of the screw nut, the pressure plate is pressed downwards, the transverse elliptical groove of the pressure plate downwards passes through the nut of the screw nut to reach the lower surface of the nut, the adjusting spring is rotated by 90 degrees again to align the longitudinal elliptical groove of the pressure plate with the nut of the screw nut, the pressure plate is loosened, the pressure plate moves upwards under the action of the adjusting spring, the screw cap of the lead screw nut enters the longitudinal elliptical groove of the pressure plate, the servo motor is installed at last, and the adjusting spring is convenient to replace. The intelligent control gas pressure regulator provided by the invention has the advantages that the servo motor is in a leisure state under the condition of normal pressure regulation, the energy consumption is reduced, and the service life of the servo motor is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of an intelligent control gas pressure regulator according to the present invention;
FIG. 2 is a schematic structural view of a spring sleeve;
FIG. 3 is a schematic structural view of the upper portion of the adjustment lever;
FIG. 4 is a schematic view of the bottom end of the adjustment lever;
FIG. 5 is a schematic view of the structure of the adjusting lever;
FIG. 6 is a schematic structural view of a connection female;
FIG. 7 is a schematic structural view of a lead screw nut;
FIG. 8 is a schematic view of the platen configuration;
fig. 9 is a schematic structural view of the limiting guide strip.
Detailed Description
The structure and the working principle of the intelligent control gas pressure regulator of the invention are further explained in detail with reference to the attached drawings and the specific embodiments.
As shown in fig. 1, the intelligent control gas pressure regulator of the invention comprises a shell 1, the shell 1 is provided with an air inlet 2 and an air outlet 3, a valve port 4 and a valve rod 5 are arranged in the shell 1, a movable valve 6 matched with the valve port 4 is arranged at the bottom end of the valve rod 5, an adjusting cavity 8 with a spring sleeve 7 is arranged at the upper end of the shell 1, an adjusting diaphragm 10 with a tray 9 is arranged in the adjusting cavity 8, the top end of the valve rod 5 is connected with the tray 9, a spring seat 11 and an adjusting spring 12 extending into the spring sleeve 7 are arranged on the tray 9, a servo motor 14 with a terminal box 13 is arranged on the spring sleeve 7, and a position display 15 is arranged on the shell 1.
As shown in fig. 2, a servo motor 14 with a terminal box 13 is arranged on the spring sleeve 7, a spline shaft 16 is arranged at the bottom of the servo motor 14, a connecting disc 17 and a large connecting nut 18 which are matched with the spring sleeve 7 are arranged at the bottom of the servo motor 14, an adjusting rod 19 is arranged in the spring sleeve 7, a spline sleeve 20 which is matched with the spline shaft 16 is arranged at the top end of the adjusting rod 19, the bottom end of the adjusting rod 19 is connected with a connecting nut 21 arranged on the spring seat 11, a lead screw nut 22 is connected to the upper part of the adjusting rod 19 in a threaded manner, a pressure plate 23 which is matched with the lead screw nut 22 is arranged on the upper part of the adjusting spring 12, a pair of fins 24 are symmetrically arranged on the outer wall of the pressure plate 23, a pair of limiting guide strips 25 which are matched with the fins 24 are symmetrically arranged on the inner wall of the spring sleeve 7, a limiting plate 26 which is matched with the fins 24 is arranged at the top of the limiting guide strips 25, an upper limit switch 27 is arranged on the spring sleeve 7, The lower limit is proximate switch 28.
As shown in fig. 3, a spline shaft 16 is arranged at the bottom of a servo motor 14, a connecting disc 17 matched with a spring sleeve 7 and a large connecting nut 18 are arranged at the bottom of the servo motor 14, an adjusting rod 19 is arranged in the spring sleeve 7, a spline sleeve 20 matched with the spline shaft 16 is arranged at the top end of the adjusting rod 19, a screw nut 22 is connected to the upper portion of the adjusting rod 19 in a threaded manner, a pressure plate 23 matched with the screw nut 22 is arranged on the upper surface of the adjusting spring 12, a pair of fins 24 is symmetrically arranged on the outer wall of the pressure plate 23, a pair of limiting guide strips 25 matched with the fins 24 is symmetrically arranged on the inner wall of the spring sleeve 7, and a limiting plate 26 matched with the fins 24 is arranged at the top of the limiting guide strips 25.
As shown in fig. 4, an adjusting rod 19 is disposed in the spring sleeve 7, and a bottom end of the adjusting rod 19 is connected to a coupling nut 21 disposed on the spring seat 11.
As shown in FIG. 5, the top end of the adjusting rod 19 is provided with a spline housing 20, the upper part of the adjusting rod 19 is provided with a thread 29, and the bottom end of the adjusting rod 19 is provided with a connecting rod 30 and a chassis 31.
As shown in fig. 6, the upper portion of the coupling nut 21 is provided with a guide groove 32, and the middle portion of the coupling nut 21 is provided with a catching groove 33.
As shown in FIG. 7, the nut 34 of the lead screw nut 22 is oval in shape.
As shown in fig. 8, the pressure plate 23 is provided with a longitudinal oval groove 35 and a transverse oval groove 36, the longitudinal oval groove 35 is arranged on the upper portion of the pressure plate, the transverse oval groove 35 vertically penetrates through the pressure plate 24, and a pair of fins 24 are symmetrically arranged on the outer wall of the pressure plate 23.
As shown in fig. 9, the inner wall of the spring sleeve 7 is provided with a limit guide bar 25, the top of the limit guide bar 25 is provided with a limit plate 26, and the spring sleeve 7 is provided with an upper limit proximity switch mounting hole 37 and a lower limit proximity switch mounting hole 38.
According to the intelligent control gas pressure regulator provided by the invention, the connecting nut 21 is arranged on the spring seat 11, during assembly, the connecting rod 30 and the chassis 31 at the bottom end of the adjusting rod 19 are respectively aligned with the guide groove 32 at the upper part of the connecting nut 21 and the clamping groove 33 at the middle part and pushed in, the connecting rod 30 of the adjusting rod 19 enters the guide groove 32 at the upper part of the connecting nut 21, the chassis 31 of the adjusting rod 19 enters the clamping groove 33 at the middle part of the connecting nut 21, and the adjusting rod 19 is vertically connected with the connecting nut 21. A pressure plate 23 is arranged on the adjusting spring 12, the upper part of the adjusting rod 19 is in threaded connection with a lead screw nut 22, an oval nut 34 of the lead screw nut 22 is arranged in a longitudinal oval groove 35 of the pressure plate 23, a fin 24 of the pressure plate 23 is in contact with a limiting guide strip 25 on the inner wall of the spring sleeve 7, and the top surface of the fin 24 of the pressure plate 23 is in contact with a limiting plate 26 on the top of the limiting guide strip 25. The servo motor 14 is arranged on the spring sleeve 7, the spline shaft 16 at the bottom of the servo motor 14 is inserted into the spline sleeve 20 at the top end of the adjusting rod 19, and the terminal box 13 is connected with the central processing unit.
The intelligent control gas pressure regulator provided by the invention firstly inputs various set values to the central processing unit. When the device starts to work, the pressure of the adjusting spring 12 is adjusted, the central processing unit sends a control command to the servo motor 14, and the servo motor 14 is started to correct the work. Servo motor 14 starts to drive 16 anticlockwise rotations of integral key shaft, 16 anticlockwise rotations of integral key shaft drive spline housing 20 anticlockwise rotations together, spline housing 20 drives regulation pole 19 anticlockwise rotations together, because adjust pole 19 and screw nut 22 threaded connection, adjust pole 19 anticlockwise rotations and drive screw nut 22 downstream, because screw nut 22's nut 34 is located pressure disk 23's vertical elliptical trough 35, screw nut 22 drives pressure disk 23 downstream together, pressure disk 23 compresses regulating spring 12 downwards, after regulating spring 12 reached the required value of outlet pressure, central processing unit assigns control command to servo motor 14, servo motor 14 stop work. And after the pressure of the adjusting spring 12 is adjusted, the pressure regulator works normally. When the pressure regulator works normally, the force of the regulating spring 12 acting on the regulating diaphragm 10 from the top and the force of the pressure of the air outlet 3 acting on the regulating diaphragm 10 from the bottom are balanced, the valve rod 5 is static, and the valve port 4 is in a normal opening state. When the pressure of the air outlet 3 rises, the force of the pressure of the air outlet 3 acting on the adjusting diaphragm 10 from below is increased, the adjusting diaphragm 10 drives the tray 9 to move upwards to compress the adjusting spring 12, the tray 9 moves upwards to drive the valve rod 5 to move upwards, the valve rod 5 drives the valve 6 to move upwards, the gap between the valve 6 and the valve port 4 is reduced, the gas throughput is reduced, the pressure of the air outlet 3 is reduced and recovered to a normal value, and therefore normal air supply is maintained. When the pressure of the air outlet 3 is reduced, the force of the pressure of the air outlet 3 acting on the adjusting diaphragm 10 from below is reduced, the adjusting diaphragm 10 drives the tray 9 to move downwards, the adjusting spring 12 is elastically stretched, the tray 9 moves downwards to drive the valve rod 5 to move downwards, the valve rod 5 drives the valve 6 to move downwards, the gap between the valve 6 and the valve port 4 is enlarged, the air throughput is increased, the pressure of the air outlet is increased to restore to a normal value, and therefore normal air supply is maintained. In the pressure regulating process, when the regulating membrane 10 drives the tray 9 to move up and down, the regulating rod 19 moves up and down along with the regulating membrane, and when the regulating rod 19 moves up and down, the spline sleeve 20 moves up and down along the spline shaft 16.
When the pressure regulator is in fault or exceeds a set value, the pressure sensor, the flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit sends a control command to the servo motor 14, and the servo motor 14 is started to carry out correction work. The servo motor 14 is started to drive the spline shaft 16 to rotate anticlockwise, the spline shaft 16 rotates anticlockwise to drive the spline housing 20 to rotate anticlockwise together, the spline housing 20 drives the adjusting rod 19 to rotate anticlockwise together, because the adjusting rod 19 is in threaded connection with the screw nut 22, the adjusting rod 19 rotates anticlockwise to drive the screw nut 22 to move downwards, because the nut 34 of the screw nut 22 is positioned in the longitudinal elliptical groove 35 of the pressure plate 23, the screw nut 22 drives the pressure plate 23 to move downwards together, the pressure plate 23 compresses the adjusting spring 12 downwards, the force of the adjusting spring 12 acting on the adjusting diaphragm 10 from the top is increased, the adjusting diaphragm 10 drives the tray 9 to move downwards, the tray 9 moves downwards to drive the valve rod 5 to move downwards, the valve rod 5 drives the valve 6 to move downwards, the gap between the valve 6 and the valve port 4 is increased, the gas throughput is increased, the pressure of the gas outlet 3 is increased and is recovered to a normal value, and therefore normal gas supply is maintained. After normal output, the pressure sensor, the flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit issues a control instruction to the servo motor 14, and the servo motor 14 stops correcting. When the screw nut 22 drives the pressure plate 23, the fins 24 on the outer wall of the pressure plate 23 contact the limiting guide strips 25 on the inner wall of the spring sleeve 7, so that the screw nut 22 and the pressure plate 23 are prevented from rotating counterclockwise along with the adjusting rod 19, and the screw nut 22 is ensured to drive the pressure plate 23 to move downwards.
When the correction work can not realize a normal output value, the pressure sensor, the flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit sends a control instruction to the servo motor 14, and the servo motor 14 is started to drive the spline shaft 16 to rotate clockwise. The spline shaft 16 rotates clockwise to drive the spline sleeve 20 to rotate clockwise, the spline sleeve 20 drives the adjusting rod 19 to rotate clockwise, the adjusting rod 19 is in threaded connection with the lead screw nut 22, the adjusting rod 19 rotates clockwise to drive the lead screw nut 22 to move upwards, the nut 34 of the lead screw nut 22 is located in the longitudinal elliptical groove 35 of the pressure plate 23, the pressure plate 23 moves upwards along with the lead screw nut 22 under the action of the adjusting spring 12, the top surface of the fin 24 of the pressure plate 23 is in contact with the limiting plate 26 at the top of the limiting guide strip 25, the limiting plate 26 blocks the pressure plate 23 from moving upwards through the fin 24 to limit the pressure plate 23, meanwhile, the longitudinal elliptical groove 35 of the pressure plate 23 limits the nut 34 of the lead screw nut 22, the lead screw nut 22 is positioned, the adjusting rod 19 rotates upwards by taking the lead screw nut 22 as a fulcrum, and the spline sleeve 20 moves upwards along the spline shaft 16 when the adjusting rod 19 moves upwards, the adjusting rod 19 moves upwards to drive the connecting nut 21 to move upwards, the connecting nut 21 moves upwards to drive the spring seat 11, the tray 9 and the adjusting diaphragm 10 to move upwards, the tray 9 moves upwards to drive the valve rod 5 to move upwards, the valve rod 5 moves upwards to drive the valve 6 to move upwards, and the valve port 4 is closed by the valve 6 to achieve the cutting-off effect. After the valve port 4 is closed, the pressure sensor, the flowmeter and the like on the pipeline transmit signals to the central processing unit, the central processing unit sends a control instruction to the servo motor 14, and the servo motor 14 stops working.
The bottom of the servo motor 14 is provided with a connecting disc 17 and a connecting large nut 18 which are matched with the spring sleeve 7, so that the servo motor 14 and the spring sleeve 7 can be quickly connected and detached. The shell 1 is provided with a position display 15 which can observe the operation switching value of the gas pressure regulator at any time. Spring sleeve 7 department of spacing gib block 25 upper end is provided with spacing proximity switch 27, and spring sleeve 7 department of spacing gib block 25 lower extreme is provided with spacing proximity switch 28 down, monitors the setting device in the spring sleeve 7, realizes functions such as the automatic alarm suggestion of equipment and safe return journey, provides the one deck safety guarantee to equipment safe operation.
When the intelligent control gas pressure regulator provided by the invention needs to replace the adjusting spring 12, the connecting large nut 18 is firstly unscrewed to take down the servo motor 14, then the pressure plate 23 is pressed downwards to make the nut 34 of the screw nut 22 separate from the longitudinal oval groove 35 of the pressure plate 23, then the pressure plate 23 is rotated by 90 degrees to make the transverse oval groove 36 of the pressure plate 23 align with the nut 34 of the screw nut 22, the pressure plate 23 is loosened, the pressure plate 23 moves upwards under the action of the adjusting spring 12, the transverse oval groove 36 of the pressure plate 23 upwards passes through the nut 34 of the screw nut 22, the top of the adjusting spring 12 reaches the upper surface of the screw nut 22, the pressure plate 23 and the adjusting spring 12 are taken out to replace the new adjusting spring 12, the new adjusting spring 12 is placed on the spring seat 11, the pressure plate 23 is placed on the new adjusting spring 12 to make the transverse oval groove 36 of the pressure plate 23 align with the nut 34 of the screw nut 22, the transverse oval groove 36 of the pressure plate 23 downwards passes through the nut 34 of the screw nut 22 to reach the lower surface of the nut 34, and rotating the pressure plate 23 by 90 degrees to align the longitudinal oval groove 35 of the pressure plate 23 with the nut 34 of the lead screw nut 22, loosening the pressure plate 23, moving the pressure plate 23 upwards under the action of the adjusting spring 12, enabling the nut 34 of the lead screw nut 22 to enter the longitudinal oval groove 35 of the pressure plate 23, and finally installing the servo motor 14, so that the adjusting spring 12 can be replaced conveniently. The intelligent control gas pressure regulator provided by the invention has the advantages that the servo motor is in a leisure state under the condition of normal pressure regulation, the energy consumption is reduced, and the service life of the servo motor is prolonged.
The intelligent control gas pressure regulator provided by the invention is not limited to the above embodiments, and any modification, equivalent replacement, improvement and the like based on the invention shall be included in the protection scope of the invention.
Claims (4)
1. Intelligent control gas pressure regulator, including the casing that has air inlet, gas outlet, be provided with valve port, valve rod in the casing, the valve rod bottom be provided with valve port assorted loose valve, the casing upper end is provided with the regulation chamber that has the spring sleeve, is provided with the regulation diaphragm that has the tray in the regulation chamber, the valve rod top is connected with the tray, is provided with the spring holder above the tray and stretches into spring sleeve's regulating spring, its characterized in that: the spring sleeve is provided with a servo motor with a terminal box, the terminal box is connected with the central processing unit, the bottom of the servo motor is provided with a spline shaft, the spring sleeve is internally provided with an adjusting rod, the top end of the adjusting rod is provided with a spline sleeve matched with the spline shaft, the bottom end of the adjusting rod is connected with a connecting nut arranged on a spring seat, the bottom end of the adjusting rod is provided with a connecting rod and a chassis, the upper part of the connecting nut is provided with a guide groove matched with the connecting rod, the middle part of the connecting nut is provided with a clamping groove matched with the chassis, the upper part of the adjusting rod is in threaded connection with a screw nut, the screw nut of the screw nut is in an oval shape, the adjusting spring is provided with a pressure plate matched with the screw nut, the pressure plate is provided with a longitudinal oval groove and a transverse oval groove which are matched with the screw nut of the screw nut, the longitudinal oval groove is arranged on the upper part of the pressure plate, and the transverse oval groove penetrates through the pressure plate from top to bottom, the outer wall symmetry of pressure disk is provided with a pair of fin, and spring sleeve's inner wall symmetry is provided with a pair of spacing gib block with fin assorted, and the top of spacing gib block is provided with fin assorted limiting plate.
2. The intelligent control gas pressure regulator of claim 1, wherein: and the bottom of the servo motor is provided with a connecting disc matched with the spring sleeve and a large connecting nut.
3. The intelligent control gas pressure regulator of claim 1, wherein: the shell is provided with a position display device, an upper limiting proximity switch is arranged at the position of a spring sleeve at the upper end of the limiting guide strip, a lower limiting proximity switch is arranged at the position of a spring sleeve at the lower end of the limiting guide strip, and the position display device, the upper limiting proximity switch and the lower limiting proximity switch are connected with the central processing unit.
4. Use of the intelligent control gas pressure regulator according to claim 1, 2 or 3, characterized in that it comprises the following steps:
first step of normal operation
Firstly, inputting various set values to a central processing unit; when the pressure regulating device starts to work, pressure regulation is firstly carried out on the regulating spring, the central processing unit sends a control command to the servo motor, and the servo motor starts the pressure regulation work of the regulating spring; the servo motor is started to drive the spline shaft to rotate anticlockwise, the spline shaft rotates anticlockwise to drive the spline sleeve to rotate anticlockwise together, the spline sleeve drives the adjusting rod to rotate anticlockwise together, the adjusting rod is in threaded connection with the lead screw nut, the lead screw nut is driven to move downwards by the anticlockwise rotation of the adjusting rod, the lead screw nut drives the pressure plate to move downwards together because the nut of the lead screw nut is positioned in the longitudinal elliptical groove of the pressure plate, the pressure plate compresses the adjusting spring downwards, after the adjusting spring reaches a required value of outlet pressure, the central processor issues a control instruction to the servo motor, and the servo motor stops working; after the pressure of the adjusting spring is adjusted, the pressure regulator works normally; when the pressure regulator works normally, the force of the regulating spring acting on the regulating diaphragm from the top and the force of the pressure of the air outlet acting on the regulating diaphragm from the bottom are balanced, the valve rod is static, and the valve port is in a normal open state; when the pressure of the air outlet rises, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is increased, the adjusting diaphragm drives the tray to move upwards to compress the adjusting spring, the tray moves upwards to drive the valve rod to move upwards, the valve rod drives the movable valve to move upwards, the gap between the movable valve and the valve port is reduced, the gas throughput is reduced, the pressure of the air outlet is reduced and recovered to a normal value, and therefore normal air supply is maintained; when the pressure of the air outlet is reduced, the force of the pressure of the air outlet acting on the adjusting diaphragm from below is reduced, the adjusting diaphragm drives the tray to move downwards, the adjusting spring elastically extends, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the movable valve to move downwards, the gap between the movable valve and the valve port is enlarged, the gas throughput is increased, the pressure of the air outlet is increased to restore to a normal value, and therefore normal air supply is maintained; in the pressure regulating process, when the regulating diaphragm drives the tray to move up and down, the regulating rod moves up and down along with the regulating diaphragm, and the spline sleeve moves up and down along the spline shaft when the regulating rod moves up and down;
second step of correction work
When the pressure regulator fails or exceeds a set value, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to the central processing unit, the central processing unit sends a control command to the servo motor, and the servo motor is started to carry out correction work; the servo motor is started to drive the spline shaft to rotate anticlockwise, the spline shaft rotates anticlockwise to drive the spline sleeve to rotate anticlockwise together, the spline sleeve drives the adjusting rod to rotate anticlockwise together, the adjusting rod is in threaded connection with the lead screw nut, the adjusting rod rotates anticlockwise to drive the lead screw nut to move downwards, the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the lead screw nut drives the pressure plate to move downwards together, the pressure plate compresses the adjusting spring downwards, the force of the adjusting spring acting on the adjusting diaphragm from the top is increased, the adjusting diaphragm drives the tray to move downwards, the tray moves downwards to drive the valve rod to move downwards, the valve rod drives the valve rod to move downwards, the gap between the valve and the valve port is increased, the gas throughput is increased, the pressure of the gas outlet is increased to a normal value, and normal gas supply is maintained; after normal output, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to a central processing unit, the central processing unit sends a control instruction to a servo motor, and the servo motor stops correcting; when the screw nut drives the pressure plate, the fins on the outer wall of the pressure plate are in contact with the limiting guide strips on the inner wall of the spring sleeve, so that the screw nut and the pressure plate are prevented from rotating anticlockwise along with the adjusting rod, and the screw nut is ensured to drive the pressure plate to move downwards;
third step of cutting-off work
When the correction work cannot realize a normal output value, a pressure sensor, a flowmeter and the like on the gas pipeline transmit signals to a central processing unit, the central processing unit sends a control command to a servo motor, and the servo motor is started to drive the spline shaft to rotate clockwise; the spline shaft rotates clockwise to drive the spline sleeve to rotate clockwise, the spline sleeve drives the adjusting rod to rotate clockwise, the adjusting rod is in threaded connection with the lead screw nut, the lead screw nut is driven to move upwards by the clockwise rotation of the adjusting rod, the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upwards along with the lead screw nut under the action of the adjusting spring, the top surface of the pressure plate fin is in contact with the limiting plate at the top of the limiting guide strip, the limiting plate blocks the pressure plate to move upwards through the pressure plate fin, the pressure plate is limited, meanwhile, the longitudinal elliptical groove of the pressure plate limits the nut of the lead screw nut, the lead screw nut is positioned, the adjusting rod rotates upwards by taking the lead screw nut as a fulcrum, the spline sleeve moves upwards along the spline shaft when the adjusting rod moves upwards, the adjusting rod moves upwards to drive the connecting nut to move upwards, the connecting nut moves upwards to drive the spring seat, the spring seat, The tray and the adjusting diaphragm move upwards, the tray moves upwards to drive the valve rod to move upwards, the valve rod moves upwards to drive the valve to move upwards, and the valve port is closed by the valve to play a role in cutting off; after the valve port is closed, the pressure sensor, the flowmeter and the like on the pipeline transmit signals to the central processing unit, the central processing unit issues a control command to the servo motor, and the servo motor stops working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110707987.0A CN113294573A (en) | 2021-06-25 | 2021-06-25 | Intelligent control gas pressure regulator and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110707987.0A CN113294573A (en) | 2021-06-25 | 2021-06-25 | Intelligent control gas pressure regulator and use method thereof |
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| CN113294573A true CN113294573A (en) | 2021-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562683A (en) * | 2022-02-25 | 2022-05-31 | 嘉兴市大宇机电有限公司 | Adjustable switch for gas pressure control and adjusting method thereof |
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2021
- 2021-06-25 CN CN202110707987.0A patent/CN113294573A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562683A (en) * | 2022-02-25 | 2022-05-31 | 嘉兴市大宇机电有限公司 | Adjustable switch for gas pressure control and adjusting method thereof |
| CN114562683B (en) * | 2022-02-25 | 2024-03-19 | 嘉兴市大宇机电有限公司 | Adjustable switch for controlling gas pressure and adjusting method thereof |
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