CN113294573B - Intelligent control gas pressure regulator and application method thereof - Google Patents

Abstract

The present invention belongs to the technical field of gas transmission and distribution equipment, and discloses an intelligent control gas pressure regulator and a method for using the same. Its main technical features are: comprising a shell, the shell is provided with an air inlet, an air outlet, a valve port, a valve stem, a movable valve, an adjustment chamber with a spring sleeve, an adjustment diaphragm with a tray, and an adjustment spring, a servo motor is provided on the spring sleeve, the servo motor is provided with a spline shaft, an adjustment rod is provided in the spring sleeve, a spline sleeve is provided on the top of the adjustment rod, the bottom of the adjustment rod is connected to the connecting mother, a lead screw nut is threadedly connected to the upper part of the adjustment rod, the nut of the lead screw nut is elliptical, a pressure plate is provided on the adjustment spring, the pressure plate is provided with a longitudinal elliptical groove, a transverse elliptical groove, and a fin, a spring sleeve is provided with a limit guide strip, and the limit guide strip is provided with a limit plate. The intelligent control gas pressure regulator realizes intelligent remote control, and can perform correction actions or cut-off actions when an abnormality occurs.

Description

Intelligent control gas pressure regulator and use method thereof

Technical Field

The present invention belongs to the technical field of gas transmission and distribution equipment, and in particular relates to an intelligently controlled gas pressure regulator and a use method thereof.

Background Art

The gas pressure regulator is a gas pressure regulating device specially used for pressure regulation and stabilization in the gas transmission and distribution system, and is widely used in gas transmission and distribution projects. Its function is to automatically adjust the gas outlet pressure to stabilize it within a certain pressure range to meet the pressure value required by the user and meet the use requirements. The structure of the gas pressure regulator currently used includes a shell with an air inlet and an air outlet, a valve port and a valve stem are arranged in the shell, a live valve matching the valve port is arranged at the bottom of the valve stem, an adjusting chamber with a spring sleeve is arranged at the upper end of the shell, an adjusting diaphragm with a tray is arranged in the adjusting chamber, the top of the valve stem is connected to 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 is working normally, the force of the adjusting spring acting on the adjusting diaphragm from above and the force of the outlet pressure acting on the adjusting diaphragm from below are balanced, the valve stem is stationary, and the valve port is in a normal open state. When the pressure at the outlet increases, the force of the pressure at the outlet acting on the regulating diaphragm from below increases, and the regulating diaphragm drives the tray to move upward to compress the regulating spring. The upward movement of the tray drives the valve stem to move upward, and the valve stem drives the movable valve to move upward. The gap between the movable valve and the valve port decreases, reducing the amount of gas passing through, so that the pressure at the outlet decreases and returns to normal, thereby maintaining normal gas supply. When the pressure at the outlet decreases, the force of the pressure at the outlet acting on the regulating diaphragm from below decreases, and the regulating diaphragm drives the tray to move downward, and the regulating spring stretches. The downward movement of the tray drives the valve stem to move downward, and the valve stem drives the movable valve to move downward. The gap between the movable valve and the valve port increases, increasing the amount of gas passing through, so that the pressure at the outlet increases and returns to normal, thereby maintaining normal gas supply. Although this type of gas pressure regulator has a good pressure regulating effect, it cannot be controlled remotely intelligently, and its use is limited.

Summary of the invention

The first technical problem to be solved by the present invention is to provide an intelligently controlled gas pressure regulator capable of intelligent remote control.

In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: it includes a shell with an air inlet and an air outlet, a valve port and a valve stem are arranged in the shell, a live valve matching the valve port is arranged at the bottom end of the valve stem, an adjusting chamber with a spring sleeve is arranged at the upper end of the shell, an adjusting diaphragm with a tray is arranged in the adjusting chamber, the top end of the valve stem is connected to 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 to the 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 matching the spline shaft is arranged at the top end of the adjusting rod, and the bottom end of the adjusting rod is connected to the spring sleeve. The connecting nut on the seat is connected, 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 matching the connecting rod, the middle part of the connecting nut is provided with a card slot matching the chassis, the upper part of the adjusting rod is threadedly connected with a screw nut, the nut of the screw nut is elliptical, and a pressure plate matching the screw nut is provided on the adjusting spring, the pressure plate is provided with a longitudinal elliptical groove and a transverse elliptical groove matching the nut of the screw nut, the longitudinal elliptical groove is provided on the upper part of the pressure plate, and the transverse elliptical groove runs through the pressure plate up and down, a pair of fins are symmetrically provided on the outer wall of the pressure plate, a pair of limit guide strips matching the fins are symmetrically provided on the inner wall of the spring sleeve, and a limit plate matching the fins is provided on the top of the limit guide strip.

Its additional technical features are: the bottom of the servo motor is provided with a connecting plate and a connecting large nut matching the spring sleeve;

The housing is provided with a position indicator, an upper limit proximity switch is provided at the spring sleeve at the upper end of the limit guide strip, and a lower limit proximity switch is provided at the spring sleeve at the lower end of the limit guide strip. The position indicator, the upper limit proximity switch, and the lower limit proximity switch are connected to the central processing unit.

The second technical problem to be solved by the present invention is to provide a method for using an intelligently controlled gas pressure regulator.

In order to solve the above technical problems, the technical solution adopted by the present invention includes the following steps:

Step 1 Normal operation

First, input various set values into the central processing unit; when starting work, first adjust the pressure of the adjusting spring, and the central processing unit issues a control command to the servo motor, and the servo motor starts the adjusting spring pressure adjustment work; the servo motor starts to drive the spline shaft to rotate counterclockwise, and the counterclockwise rotation of the spline shaft drives the spline sleeve to rotate counterclockwise, and the spline sleeve drives the adjusting rod to rotate counterclockwise. Since the adjusting rod is threadedly connected with the lead screw nut, the counterclockwise rotation of the adjusting rod drives the lead screw nut to move downward. Since 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 downward, and the pressure plate compresses the adjusting spring downward. After the adjusting spring reaches the required value of the outlet pressure, the central processing unit issues a control command to the servo motor, and the servo motor stops working; the adjusting spring pressure adjustment is completed, and the pressure regulator works normally; when the pressure regulator works normally, the force of the adjusting spring acting on the adjusting diaphragm from above and the outlet pressure acting on the adjusting diaphragm from below The forces are balanced, the valve stem is stationary, and the valve port is in a normally open state; when the outlet pressure increases, the force of the outlet pressure acting on the adjusting diaphragm from below increases, the adjusting diaphragm drives the tray to move upward and compresses the adjusting spring, the upward movement of the tray drives the valve stem to move upward, the valve stem drives the movable valve to move upward, the gap between the movable valve and the valve port decreases, the gas flow rate is reduced, and the outlet pressure is reduced to restore to a normal value, thereby maintaining normal gas supply; when the outlet pressure decreases, the force of the outlet pressure acting on the adjusting diaphragm from below decreases, the adjusting diaphragm drives the tray to move downward, the adjusting spring stretches, the downward movement of the tray drives the valve stem to move downward, the valve stem drives the movable valve to move downward, the gap between the movable valve and the valve port increases, the gas flow rate is increased, and the outlet pressure increases to restore to a normal value, thereby maintaining normal gas supply; during the pressure regulation process, when the adjusting diaphragm drives the tray to move up and down, the adjusting rod moves up and down accordingly, and the spline sleeve moves up and down along the spline shaft when the adjusting rod moves up and down;

Step 2 Correction work

When the pressure regulator fails or exceeds the set value, the pressure sensor, flow meter, etc. on the gas pipeline transmits a signal to the central processor, and the central processor issues a control command to the servo motor, which starts to perform correction work; the servo motor starts to drive the spline shaft to rotate counterclockwise, and the counterclockwise rotation of the spline shaft drives the spline sleeve to rotate counterclockwise, and the spline sleeve drives the adjusting rod to rotate counterclockwise. Since the adjusting rod is threadedly connected to the lead screw nut, the counterclockwise rotation of the adjusting rod drives the lead screw nut to move downward. Since 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 downward, and the pressure plate compresses the adjusting spring downward, and the adjusting spring acts on the adjusting rod from above. The force on the diaphragm increases, and the diaphragm is adjusted to drive the tray to move downward. The downward movement of the tray drives the valve stem to move downward, and the valve stem drives the movable valve to move downward. The gap between the movable valve and the valve port increases, increasing the gas flow rate, so that the outlet pressure increases and returns to normal, thereby maintaining normal gas supply; after normal output, the pressure sensor, flow meter, etc. on the gas pipeline transmits signals to the central processor, and the central processor issues a control command to the servo motor, and the servo motor stops the correction work; when the lead screw nut drives the pressure plate, the fins on the outer wall of the pressure plate contact the limit guide strips on the inner wall of the spring sleeve, preventing the lead screw nut and the pressure plate from rotating counterclockwise with the adjusting rod, ensuring that the lead screw nut drives the pressure plate to move downward;

Step 3: Cut off work

When the correction work cannot achieve the normal output value, the pressure sensor, flow meter, etc. on the gas pipeline transmits a signal to the central processor, and the central processor issues a control command to the servo motor. The servo motor starts to drive the spline shaft to rotate clockwise; the spline shaft rotates clockwise to drive the spline sleeve to rotate clockwise, and the spline sleeve drives the adjusting rod to rotate clockwise. Since the adjusting rod is threadedly connected to the lead screw nut, the clockwise rotation of the adjusting rod drives the lead screw nut to move upward. Since the nut of the lead screw nut is located in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upward with the lead screw nut under the action of the adjusting spring, and the top surface of the pressure plate fin contacts the limit plate on the top of the limit guide strip, and the limit plate blocks the pressure plate through the pressure plate fin. The plate moves upward to limit the pressure plate. At the same time, the longitudinal elliptical groove of the pressure plate limits the nut of the screw nut. The screw nut is positioned, and the adjusting rod rotates and moves upward with the screw nut as the fulcrum. When the adjusting rod moves upward, the spline sleeve moves upward along the spline axis, and the adjusting rod moves upward to drive the connecting nut to move upward. The connecting nut moves upward to drive the spring seat, the tray, and the adjusting diaphragm to move upward. The tray moves upward to drive the valve stem upward. The valve stem moves upward to drive the live valve upward. The live valve closes the valve port to cut off the valve port. After the valve port is closed, the pressure sensor, flow meter, etc. on the pipeline transmit signals to the central processor, and the central processor issues a control command to the servo motor, and the servo motor stops working.

The intelligent control gas pressure regulator provided by the present invention has a connecting nut arranged on the spring seat. During assembly, the connecting rod and the chassis at the bottom of the adjusting rod are respectively aligned with the guide groove on the upper part of the connecting nut and the slot in the middle part and pushed in. The connecting rod of the adjusting rod enters the guide groove on the upper part of the connecting nut, and the chassis of the adjusting rod enters the slot in the middle part of the connecting nut. The adjusting rod and the connecting nut are connected up and down. A pressure plate is arranged on the adjusting spring. The upper part of the adjusting rod is threadedly connected to the lead screw nut. The elliptical nut of the lead screw nut is arranged in the longitudinal elliptical groove of the pressure plate. The fins of the pressure plate are in contact with the limiting guide strip on the inner wall of the spring sleeve, and the top surface of the fins of the pressure plate are in contact with the limiting plate at the top of the limiting guide strip. The servo motor is installed on the spring sleeve, and the spline shaft at the bottom of the servo motor is inserted into the spline sleeve at the top of the adjusting rod. The terminal box is connected to the central processing unit.

The intelligent control gas pressure regulator provided by the present invention first inputs various set values to the central processing unit. When starting to work, the pressure of the regulating spring is first adjusted, and the central processing unit issues a control command to the servo motor, and the servo motor starts the pressure adjustment of the regulating spring. The servo motor starts to drive the spline shaft to rotate counterclockwise, and the counterclockwise rotation of the spline shaft drives the spline sleeve to rotate counterclockwise together, and the spline sleeve drives the regulating rod to rotate counterclockwise together. Since the regulating rod is threadedly connected with the lead screw nut, the counterclockwise rotation of the regulating rod drives the lead screw nut to move downward. Since 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 downward, and the pressure plate compresses the regulating spring downward. After the regulating spring reaches the required value of the outlet pressure, the central processing unit issues a control command to the servo motor, and the servo motor stops working. The pressure adjustment of the regulating spring is completed, and the pressure regulator works normally. When the pressure regulator works normally, the force of the regulating spring acting on the regulating diaphragm from above and the force of the outlet pressure acting on the regulating diaphragm from below are balanced, the valve stem is stationary, and the valve port is in a normal open state. When the pressure at the outlet increases, the force of the pressure at the outlet acting on the regulating diaphragm from below increases, and the regulating diaphragm drives the tray to move upward to compress the regulating spring. The upward movement of the tray drives the valve stem to move upward, and the valve stem drives the movable valve to move upward. The gap between the movable valve and the valve port decreases, reducing the amount of gas passing through, so that the pressure at the outlet decreases and returns to normal, thereby maintaining normal gas supply. When the pressure at the outlet decreases, the force of the pressure at the outlet acting on the regulating diaphragm from below decreases, and the regulating diaphragm drives the tray to move downward, and the regulating spring stretches. The downward movement of the tray drives the valve stem to move downward, and the valve stem drives the movable valve to move downward. The gap between the movable valve and the valve port increases, increasing the amount of gas passing through, so that the pressure at the outlet increases and returns to normal, thereby maintaining normal gas supply. During the pressure regulation process, when the regulating diaphragm drives the tray to move up and down, the regulating rod moves up and down accordingly, and when the regulating rod moves up and down, the spline sleeve moves up and down along the spline shaft.

When the pressure regulator fails or exceeds the set value, the pressure sensor and flow meter on the gas pipeline transmit signals to the central processor, and the central processor issues control instructions to the servo motor, which starts to correct the work. The servo motor starts to drive the spline shaft to rotate counterclockwise, and the counterclockwise rotation of the spline shaft drives the spline sleeve to rotate counterclockwise together, and the spline sleeve drives the adjustment rod to rotate counterclockwise together. Since the adjustment rod is threadedly connected with the lead screw nut, the counterclockwise rotation of the adjustment rod drives the lead screw nut to move downward. Since 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 downward together, and the pressure plate compresses the adjustment spring downward. The force of the adjustment spring acting on the adjustment diaphragm from above increases, and the adjustment diaphragm drives the tray to move downward. The downward movement of the tray drives the valve stem to move downward, and the valve stem drives the live valve to move downward. The gap between the live valve and the valve port increases, increasing the gas flow rate, so that the outlet pressure increases and returns to normal value, thereby maintaining normal gas supply. After normal output, the pressure sensor and flow meter on the gas pipeline transmit signals to the central processor, and the central processor issues control instructions to the servo motor, and the servo motor stops the correction work. When the lead screw nut drives the pressure plate, the fins on the outer wall of the pressure plate contact the limit guide strips on the inner wall of the spring sleeve to prevent the lead screw nut and the pressure plate from rotating counterclockwise with the adjusting rod, thereby ensuring that the lead screw nut drives the pressure plate to move downward.

When the correction work cannot achieve the normal output value, the pressure sensor, flow meter, etc. on the gas pipeline transmits a signal to the central processor, and the central processor issues a control command to the servo motor. The servo motor starts and drives the spline shaft to rotate clockwise. The spline shaft rotates clockwise, driving the spline sleeve to rotate clockwise, and the spline sleeve drives the adjusting rod to rotate clockwise. Since the adjusting rod is threadedly connected with the screw nut, the clockwise rotation of the adjusting rod drives the screw nut to move upward. Since the nut of the screw nut is located in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upward with the screw nut under the action of the adjusting spring, and the top surface of the pressure plate fin contacts the limit plate on the top of the limit guide strip. The limit plate blocks the pressure plate from moving upward through the pressure plate fin to limit the pressure plate. At the same time, the longitudinal elliptical groove of the pressure plate limits the nut of the screw nut, and the screw nut is positioned. The adjusting rod rotates upward with the screw nut as the fulcrum. When the adjusting rod moves upward, the spline sleeve moves upward along the spline shaft, and the adjusting rod moves upward, driving the connecting nut to move upward. The connecting nut moves upward, driving the spring seat, tray, and adjusting diaphragm to move upward. The upward movement of the tray drives the valve stem to move upward, and the upward movement of the valve stem drives the live valve to move upward, and the live valve closes the valve port to cut off the valve. After the valve port is closed, the pressure sensor, flow meter, etc. on the pipeline transmit signals to the central processor, and the central processor issues control instructions to the servo motor, and the servo motor stops working.

The bottom of the servo motor is provided with a connection plate and a large connection nut that match the spring sleeve, so that the servo motor and the spring sleeve can be quickly connected and disassembled. The housing is provided with a position indicator, which can observe the operating switch value of the gas pressure regulator at any time. The spring sleeve at the upper end of the limit guide bar is provided with an upper limit proximity switch, and the spring sleeve at the lower end of the limit guide bar is provided with a lower limit proximity switch. The setting device in the spring sleeve is monitored to realize the automatic alarm prompt and safe return of the equipment, providing an extra layer of safety protection for the safe operation of the equipment.

When the adjusting spring of the intelligent controlled gas pressure regulator provided by the present invention needs to be replaced, first unscrew the large connecting nut to remove the servo motor, then press down the pressure plate to disengage the nut of the lead screw nut from the longitudinal elliptical groove of the pressure plate, then rotate the pressure plate 90 degrees to align the transverse elliptical groove of the pressure plate with the nut of the lead screw nut, loosen the pressure plate, and the pressure plate moves upward under the action of the adjusting spring, and the transverse elliptical groove of the pressure plate passes upward through the nut of the lead screw nut, and the top of the adjusting spring reaches above the lead screw nut, then take out the pressure plate and the adjusting spring, and replace with a new one. Spring, place the new adjustment spring on the spring seat, place the pressure plate on the new adjustment spring, align the transverse elliptical groove of the pressure plate with the nut of the lead screw nut, press the pressure plate downward, the transverse elliptical groove of the pressure plate passes downward through the nut of the lead screw nut to reach under the nut, and then rotate the pressure plate 90° to align the longitudinal elliptical groove of the pressure plate with the nut of the lead screw nut, loosen the pressure plate, the pressure plate moves up under the action of the adjustment spring, and the nut of the lead screw nut enters the longitudinal elliptical groove of the pressure plate, and finally install the servo motor, which is convenient for replacing the adjustment spring. In the intelligent control gas pressure regulator provided by the present invention, under normal pressure regulation, the servo motor is in an idle state, which reduces energy consumption and prolongs the service life of the servo motor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an intelligently controlled gas pressure regulator according to the present invention;

FIG2 is a schematic structural diagram of a spring sleeve;

FIG3 is a schematic structural diagram of the upper portion of the adjusting rod;

FIG4 is a schematic structural diagram of the bottom end of the adjusting rod;

FIG5 is a schematic diagram of the structure of the adjusting rod;

FIG6 is a schematic diagram of the structure of a connecting mother;

FIG7 is a schematic diagram of the structure of the lead screw nut;

FIG8 is a schematic structural diagram of a pressure plate;

FIG. 9 is a schematic structural diagram of a position-limiting guide strip.

DETAILED DESCRIPTION

The structure and working principle of the intelligent control gas pressure regulator of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the intelligent controlled gas pressure regulator of the present invention includes a shell 1, the shell 1 has an air inlet 2 and an air outlet 3, a valve port 4 and a valve stem 5 are arranged in the shell 1, a movable valve 6 matching the valve port 4 is arranged at the bottom end of the valve stem 5, an adjusting chamber 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 chamber 8, the top end of the valve stem 5 is connected to 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 indicator 15 is arranged on the shell 1.

As shown in Figure 2, a servo motor 14 with a terminal box 13 is arranged on the top of the spring sleeve 7, a spline shaft 16 is arranged at the bottom of the servo motor 14, a connecting plate 17 and a large connecting nut 18 matching 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 matching the spline shaft 16 is arranged at the top of the adjusting rod 19, the bottom end of the adjusting rod 19 is connected to a connecting nut 21 arranged on the spring seat 11, a lead screw nut 22 is threadedly connected to the upper part of the adjusting rod 19, a pressure plate 23 matching the lead screw nut 22 is arranged on the adjusting spring 12, a pair of fins 24 are symmetrically arranged on the outer wall of the pressure plate 23, a pair of limit guide strips 25 matching the fins 24 are symmetrically arranged on the inner wall of the spring sleeve 7, a limit plate 26 matching the fins 24 is arranged on the top of the limit guide strip 25, and an upper limit proximity switch 27 and a lower limit proximity switch 28 are provided on the spring sleeve 7.

As shown in Figure 3, a spline shaft 16 is provided at the bottom of the servo motor 14, and a connecting plate 17 and a large connecting nut 18 matching the spring sleeve 7 are provided at the bottom of the servo motor 14. An adjusting rod 19 is provided in the spring sleeve 7, and a spline sleeve 20 matching the spline shaft 16 is provided at the top of the adjusting rod 19. A lead screw nut 22 is threadedly connected to the upper part of the adjusting rod 19, and a pressure plate 23 matching the lead screw nut 22 is provided on the adjusting spring 12. A pair of fins 24 are symmetrically provided on the outer wall of the pressure plate 23, and a pair of limit guide strips 25 matching the fins 24 are symmetrically provided on the inner wall of the spring sleeve 7. A limit plate 26 matching the fins 24 is provided on the top of the limit guide strip 25.

As shown in FIG. 4 , an adjusting rod 19 is disposed in the spring sleeve 7 , and the bottom end of the adjusting rod 19 is connected to a connecting nut 21 disposed on the spring seat 11 .

As shown in FIG. 5 , a spline sleeve 20 is disposed at the top of the adjusting rod 19 , a thread 29 is disposed at the upper portion of the adjusting rod 19 , and a connecting rod 30 and a chassis 31 are disposed at the bottom end of the adjusting rod 19 .

As shown in FIG. 6 , a guide groove 32 is provided at the upper portion of the connecting nut 21 , and a clamping groove 33 is provided at the middle portion of the connecting nut 21 .

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 elliptical groove 35 and a transverse elliptical groove 36 . The longitudinal elliptical groove 35 is provided on the upper part of the pressure plate, and the transverse elliptical groove 35 passes through the pressure plate 24 up and down. A pair of fins 24 are symmetrically provided on the outer wall of the pressure plate 23 .

As shown in FIG. 9 , a limit guide strip 25 is disposed on the inner wall of the spring sleeve 7 , a limit plate 26 is disposed on the top of the limit guide strip 25 , and an upper limit proximity switch mounting hole 37 and a lower limit proximity switch mounting hole 38 are disposed on the spring sleeve 7 .

The intelligent control gas pressure regulator provided by the present invention has a connecting nut 21 arranged on the spring seat 11. During assembly, the connecting rod 30 and the chassis 31 at the bottom of the adjusting rod 19 are respectively aligned with the guide groove 32 at the top of the connecting nut 21 and the clamping groove 33 in the middle, and the connecting rod 30 of the adjusting rod 19 enters the guide groove 32 at the top of the connecting nut 21, and the chassis 31 of the adjusting rod 19 enters the clamping groove 33 in the middle of the connecting nut 21, and the adjusting rod 19 is connected with the connecting nut 21 up and down. A pressure plate 23 is arranged on the adjusting spring 12, and the upper part of the adjusting rod 19 is threadedly connected to the lead screw nut 22, and the elliptical nut 34 of the lead screw nut 22 is arranged in the longitudinal elliptical groove 35 of the pressure plate 23, and the fin 24 of the pressure plate 23 contacts the limit 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 contacts the limit plate 26 at the top of the limit guide strip 25. The servo motor 14 is mounted 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 of the adjusting rod 19, and the terminal box 13 is connected to the central processing unit.

The intelligent control gas pressure regulator provided by the present invention first inputs various set values to the central processing unit. When starting work, the pressure of the adjusting spring 12 is first adjusted, and the central processing unit issues a control command to the servo motor 14, and the servo motor 14 starts to perform correction work. The servo motor 14 starts to drive the spline shaft 16 to rotate counterclockwise, and the counterclockwise rotation of the spline shaft 16 drives the spline sleeve 20 to rotate counterclockwise together, and the spline sleeve 20 drives the adjusting rod 19 to rotate counterclockwise together. Since the adjusting rod 19 is threadedly connected with the lead screw nut 22, the counterclockwise rotation of the adjusting rod 19 drives the lead screw nut 22 to move downward. Since the nut 34 of the lead screw nut 22 is located in the longitudinal elliptical groove 35 of the pressure plate 23, the lead screw nut 22 drives the pressure plate 23 to move downward together, and the pressure plate 23 compresses the adjusting spring 12 downward. After the adjusting spring 12 reaches the required value of the outlet pressure, the central processing unit issues a control command to the servo motor 14, and the servo motor 14 stops working. The pressure adjustment of the adjusting spring 12 is completed, and 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 above and the force of the pressure of the gas outlet 3 acting on the regulating diaphragm 10 from below reach a balance, the valve stem 5 is stationary, and the valve port 4 is in a normal open state. When the pressure of the gas outlet 3 increases, the force of the pressure of the gas outlet 3 acting on the regulating diaphragm 10 from below increases, the regulating diaphragm 10 drives the tray 9 to move upward to compress the regulating spring 12, the tray 9 moves upward to drive the valve stem 5 to move upward, the valve stem 5 drives the movable valve 6 to move upward, the gap between the movable valve 6 and the valve port 4 decreases, the gas flow rate is reduced, the pressure of the gas outlet 3 decreases and returns to a normal value, thereby maintaining normal gas supply. When the pressure of the gas outlet 3 decreases, the force of the pressure of the gas outlet 3 acting on the regulating diaphragm 10 from below decreases, the regulating diaphragm 10 drives the tray 9 to move downward, the regulating spring 12 stretches, the tray 9 moves downward to drive the valve stem 5 to move downward, the valve stem 5 drives the movable valve 6 to move downward, the gap between the movable valve 6 and the valve port 4 increases, the gas flow rate is increased, the pressure of the gas outlet increases and returns to a normal value, thereby maintaining normal gas supply. During the pressure regulation process, when the regulating diaphragm 10 drives the tray 9 to move up and down, the regulating rod 19 moves up and down accordingly. 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 fails or exceeds the set value, the pressure sensor, flow meter, etc. on the gas pipeline transmits a signal to the central processor, and the central processor issues a control command to the servo motor 14, which starts to perform correction work. The servo motor 14 starts and drives the spline shaft 16 to rotate counterclockwise. The counterclockwise rotation of the spline shaft 16 drives the spline sleeve 20 to rotate counterclockwise together. The spline sleeve 20 drives the adjusting rod 19 to rotate counterclockwise together. Since the adjusting rod 19 is threadedly connected with the screw nut 22, the counterclockwise rotation of the adjusting rod 19 drives the screw nut 22 to move downward. Since the nut 34 of the screw nut 22 is located in the longitudinal elliptical groove 35 of the pressure plate 23, the screw nut 22 drives the pressure plate 23 to move downward together. The pressure plate 23 compresses the adjusting spring 12 downward. The force of the adjusting spring 12 acting on the adjusting diaphragm 10 from above increases. The adjusting diaphragm 10 drives the tray 9 to move downward. The downward movement of the tray 9 drives the valve stem 5 to move downward. The valve stem 5 drives the active valve 6 to move downward. The gap between the active valve 6 and the valve port 4 increases, which increases the gas passage and increases the pressure at the air outlet 3 to return to normal value, thereby maintaining normal air supply. After normal output, the pressure sensor, flow meter, etc. on the gas pipeline transmit signals to the central processor, and the central processor issues a control command to the servo motor 14, and the servo motor 14 stops the correction work. When the lead screw nut 22 drives the pressure plate 23, the fin 24 on the outer wall of the pressure plate 23 contacts the limit guide strip 25 on the inner wall of the spring sleeve 7, preventing the lead screw nut 22 and the pressure plate 23 from rotating counterclockwise with the adjustment rod 19, ensuring that the lead screw nut 22 drives the pressure plate 23 to move downward.

When the correction work cannot achieve the normal output value, the pressure sensor, flow meter, etc. on the gas pipeline transmits a signal to the central processor, and the central processor issues a control command to the servo motor 14. The servo motor 14 starts to drive the spline shaft 16 to rotate clockwise. The spline shaft 16 rotates clockwise to drive the spline sleeve 20 to rotate clockwise, and the spline sleeve 20 drives the adjustment rod 19 to rotate clockwise. Since the adjustment rod 19 is threadedly connected to the screw nut 22, the adjustment rod 19 rotates clockwise to drive the screw nut 22 to move upward. Since the nut 34 of the screw nut 22 is located in the longitudinal elliptical groove 35 of the pressure plate 23, the pressure plate 23 moves upward with the screw nut 22 under the action of the adjustment spring 12. The top surface of the fin 24 of the pressure plate 23 contacts the limit plate 26 at the top of the limit guide strip 25. The limit plate 26 blocks the pressure plate 23 from moving upward through the fin 24, which affects the pressure. The plate 23 is limited, and at the same time, the longitudinal elliptical groove 35 of the pressure plate 23 limits the nut 34 of the screw nut 22, the screw nut 22 is positioned, and the adjusting rod 19 rotates and moves upward with the screw nut 22 as the fulcrum. When the adjusting rod 19 moves upward, the spline sleeve 20 moves upward along the spline shaft 16, and the adjusting rod 19 moves upward to drive the connecting nut 21 to move upward, and the connecting nut 21 moves upward to drive the spring seat 11, the tray 9, and the adjusting diaphragm 10 to move upward, and the tray 9 moves upward to drive the valve stem 5 to move upward, and the valve stem 5 moves upward to drive the live valve 6 to move upward, and the live valve 6 closes the valve port 4 to play a cutting role. After the valve port 4 is closed, the pressure sensor, flow meter, etc. on the pipeline transmit signals to the central processor, and the central processor issues 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 connection plate 17 and a large connection nut 18 that match the spring sleeve 7, so that the servo motor 14 can be quickly connected and disassembled with the spring sleeve 7. The housing 1 is provided with a position indicator 15, which can observe the operating switch value of the gas pressure regulator at any time. An upper limit proximity switch 27 is provided at the spring sleeve 7 at the upper end of the limit guide bar 25, and a lower limit proximity switch 28 is provided at the spring sleeve 7 at the lower end of the limit guide bar 25. The setting device in the spring sleeve 7 is monitored to realize the automatic alarm prompt and safe return of the equipment, etc., providing an extra layer of safety protection for the safe operation of the equipment.

When the adjusting spring 12 of the intelligent controlled gas pressure regulator provided by the present invention needs to be replaced, first unscrew the large connecting nut 18 to remove the servo motor 14, then press down the pressure plate 23 to disengage the nut 34 of the lead screw nut 22 from the longitudinal elliptical groove 35 of the pressure plate 23, and then rotate the pressure plate 23 90 degrees to align the transverse elliptical groove 36 of the pressure plate 23 with the nut 34 of the lead screw nut 22, loosen the pressure plate 23, and the pressure plate 23 moves upward under the action of the adjusting spring 12, and the transverse elliptical groove 36 of the pressure plate 23 passes upward through the nut 34 of the lead screw nut 22, and the top of the adjusting spring 12 reaches above the lead screw nut 22, then take out the pressure plate 23 and the adjusting spring 12, and replace with a new adjusting spring 12. Place the new adjustment spring 12 on the spring seat 11, place the pressure plate 23 on the new adjustment spring 12, align the transverse elliptical groove 36 of the pressure plate 23 with the nut 34 of the screw nut 22, press down the pressure plate 23, the transverse elliptical groove 36 of the pressure plate 23 passes downward through the nut 34 of the screw nut 22 to reach below the nut 34, and then rotate the pressure plate 23 90 degrees to align the longitudinal elliptical groove 35 of the pressure plate 23 with the nut 34 of the screw nut 22, loosen the pressure plate 23, the pressure plate 23 moves up under the action of the adjustment spring 12, and the nut 34 of the screw nut 22 enters the longitudinal elliptical groove 35 of the pressure plate 23, and finally install the servo motor 14, which is convenient for replacing the adjustment spring 12. In the intelligent control gas pressure regulator provided by the present invention, the servo motor is in a leisure state under normal pressure regulation, which reduces energy consumption and prolongs the service life of the servo motor.

The intelligent controlled gas pressure regulator provided by the present invention is not limited to the above-mentioned embodiments. Any modifications, equivalent substitutions and improvements made on the basis of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. The utility model provides an intelligent control gas pressure regulator, including having the casing of air inlet, gas outlet, be provided with valve port, valve rod in the casing, the valve rod bottom be provided with valve port assorted live valve, the casing upper end is provided with the regulation chamber that has spring sleeve, is provided with the regulation diaphragm that has the tray in the regulation chamber, and 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 upper part of 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, an adjusting rod is arranged in the spring sleeve, 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 elliptical, the adjusting spring is provided with a pressure plate matched with the screw nut, the pressure plate is provided with a longitudinal elliptical groove and a transverse elliptical groove matched with the screw nut, the longitudinal elliptical groove is arranged on the upper part of the pressure plate, the transverse elliptical groove penetrates the pressure plate up and down, the outer wall of the spring sleeve is symmetrically provided with a pair of fins, the inner wall of the spring sleeve is symmetrically provided with a pair of limit guide bars matched with the fins, and the top of the limit guide bars is provided with limit plates matched with the fins; 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 display, an upper limit proximity switch is arranged at a spring sleeve at the upper end of the limit guide bar, a lower limit proximity switch is arranged at a spring sleeve at the lower end of the limit guide bar, and the display, the upper limit proximity switch and the lower limit proximity switch are connected with the central processing unit; 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 rod, and when the regulating rod moves up and down, the spline housing moves up and down along the spline shaft.

2. The method of using an intelligent control gas pressure regulator according to claim 1, comprising the steps of:

The first step of normal operation

Firstly, inputting various set values into a central processing unit; when the device starts to work, the pressure of the regulating spring is regulated, the central processing unit sends a control instruction to the servo motor, and the servo motor starts the pressure regulating work of the regulating spring; 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, the adjusting rod is in threaded connection with the screw nut, the screw nut is driven to move downwards by the anticlockwise rotation of the adjusting rod, the screw nut drives the pressure plate to move downwards together by the screw nut, the pressure plate compresses the adjusting spring downwards, and after the adjusting spring reaches a required value of outlet pressure, the central processing unit gives a control instruction to the servo motor, and the servo motor stops working; after the pressure of the regulating spring is regulated, the pressure regulator works normally; when the pressure regulator works normally, the force acting on the regulating diaphragm from the upper side of the regulating spring and the force acting on the regulating diaphragm from the lower side of the regulating spring reach balance, the valve rod is static, and the valve port is in a normal opening state; when the pressure of the air outlet is increased, the force acting on the adjusting diaphragm from the lower side 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 to be recovered to a normal value, and therefore normal air supply is maintained; when the pressure of the air outlet is reduced, the pressure of the air outlet is reduced by the force acting on the adjusting diaphragm from below, the adjusting diaphragm drives the tray to move downwards, the adjusting spring stretches elastically, 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 throughput of air is increased, and the pressure of the air outlet is increased to restore to a normal value, so that 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 rod, and when the regulating rod moves up and down, the spline housing moves up and down along the spline shaft;

Second step of correction work

When the pressure regulator fails or exceeds a set value, the pressure sensor and the flowmeter on the gas pipeline transmit signals to the central processing unit, the central processing unit transmits control instructions 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 sleeve drives 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 screw nut, the screw nut is driven to move downwards by the anticlockwise rotation of the adjusting rod, the screw nut drives the pressure plate to move downwards together by the nut of the screw nut being positioned in a longitudinal elliptical groove of the pressure plate, the pressure plate compresses the adjusting spring downwards, the force acting on the adjusting diaphragm from the adjusting spring 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 movable valve to move downwards, the gap between the movable valve and the valve port is increased, the gas throughput is increased, the pressure of the gas outlet is increased to restore to a normal value, and normal gas supply is maintained; after normal output, the pressure sensor and the flowmeter on the gas pipeline transmit signals to the central processing unit, and the central processing unit sends control instructions to the servo motor, and the servo motor stops correcting work; when the screw nut drives the pressure plate, the fins on the outer wall of the pressure plate are contacted with the limit 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 can not realize the normal output value, the pressure sensor and the flowmeter on the gas pipeline transmit signals to the central processing unit, the central processing unit transmits control instructions 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 housing to rotate clockwise together, the spline housing drives the adjusting rod to rotate clockwise together, because the adjusting rod is in threaded connection with the screw nut, the adjusting rod rotates clockwise to drive the screw nut to move upwards, because the nut of the screw nut is positioned in the longitudinal elliptical groove of the pressure plate, the pressure plate moves upwards together with the screw nut under the action of the adjusting spring, the top surface of the pressure plate fin contacts 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 to limit the pressure plate, meanwhile, the longitudinal elliptical groove of the pressure plate limits the nut of the screw nut, the screw nut is positioned, the adjusting rod rotates upwards by taking the screw nut as a fulcrum, the spline housing 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 tray and the adjusting diaphragm to move upwards to drive the valve rod to move upwards, the valve rod moves upwards to drive the movable valve to close the valve port, and the movable valve is used for cutting off. After the valve port is closed, the pressure sensor and the flowmeter on the pipeline transmit signals to the central processing unit, and the central processing unit sends control instructions to the servo motor, and the servo motor stops working.