CN112747155B - A commander for gas pressure regulator - Google Patents

A commander for gas pressure regulator Download PDF

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Publication number
CN112747155B
CN112747155B CN202011561583.7A CN202011561583A CN112747155B CN 112747155 B CN112747155 B CN 112747155B CN 202011561583 A CN202011561583 A CN 202011561583A CN 112747155 B CN112747155 B CN 112747155B
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China
Prior art keywords
pressure regulating
pressure
cavity
valve
regulating valve
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CN202011561583.7A
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Chinese (zh)
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CN112747155A (en
Inventor
陈伟忠
李海
毛杰
张琦
姜大春
于翠翠
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Jiangsu Shengwei Gas Technology Co ltd
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Jiangsu Shengwei Gas Technology Co ltd
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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
    • 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
    • F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing mechanism
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

The invention discloses a director for a gas pressure regulator, which comprises an upper shell, a lower shell, a diaphragm, a valve rod, a first pressure regulating spring, a discharge valve seat, a discharge valve clack, a discharge spring, a pressure regulating valve seat, a pressure regulating valve clack, a second pressure regulating spring and a bottom cover, wherein a limiting piece is arranged on the valve rod and is positioned below the discharge valve clack; when the valve rod moves downwards, the lower end of the valve rod can push the pressure regulating valve clack to move downwards so as to open the pressure regulating opening. The director for the gas pressure regulator can solve the technical problem that the existing director is difficult to maintain and adjust.

Description

A commander for gas pressure regulator
Technical Field
The invention relates to the technical field of gas pressure regulators, in particular to a director for a gas pressure regulator.
Background
The gas pressure regulator is a device which can automatically regulate the gas outlet pressure and make it stable in a certain pressure range. The gas pressure regulator consists of a director and a main valve, and the inlet pressure of the pressure regulator is commonly called P1The pressure is high and the outlet pressure is generally referred to as P2The pressure is lower than the inlet pressure and needs to be stable, and the gas delivered by the gas pipeline passes through the main valve of the pressure regulator to control the pressure from P1Regulation to P2And is supplied to a downstream pipeline or a gas appliance. The driving pressure is generally referred to as P3The pressure of the main valve is between the inlet pressure and the outlet pressure, is a variable for adjusting the opening size of the main valve, and is provided by a director. The pilot valve is a preamplifier of indirect-acting pressure regulator and uses the outlet pressure P2Is amplified to obtainTo the driving pressure P3To control the opening of the main valve cylinder and the valve pad to maintain the main valve outlet pressure P of the pressure regulator2The stability of (2).
As shown in fig. 1, the existing commander mainly includes an upper housing 1', a lower housing 2' fixedly connected to the upper housing 1', and a diaphragm 3' disposed between the upper housing 1' and the lower housing 2', the diaphragm 3' divides a space enclosed by the upper housing 1' and the lower housing 2' into an upper cavity 4' and a lower cavity 5', a central shaft 6' is fixedly mounted on the diaphragm 3', a pressure stabilizing spring 7' is disposed at an upper end of the central shaft 6', the pressure stabilizing spring 7' is disposed in the upper cavity 4', a lever 8' is hinged to a lower end of the central shaft 6', the other end of the lever 8' is connected to an adjusting screw 9', a lower end of the adjusting screw 9' is connected to a pressure regulating valve flap 10', and a middle portion of the lever 8' is connected to a discharge valve flap 11' through a connecting rod.
When the existing director works normally, the pressure on both sides of the membrane 3' is balanced. If the pressure at the outlet of the pressure regulator P2The pressure is fed back to the lower cavity 5 'at the lower side of the diaphragm 3' due to the fact that the pressure is lower than the set pressure for a certain reason, the diaphragm 3 'moves downwards and drives the central shaft 6' to press the lever 8', the left side of the lever 8' tilts upwards, the pressure regulating valve clack 10 'moves upwards under the action of the spring and the opening of the pressure regulating valve seat 12' is increased, and the pressure stabilizing pressure P is4(supplied by a potentiostat, the pressure P4Is lower than the inlet pressure P1And above the outlet pressure P2One pressure) is changed from the gap between the pressure regulating valve flap 10 'and the pressure regulating valve seat 12' to the actuating pressure P by flowing out through the valve seat center hole3At this time, the opening degree is increased, so that P3Elevated, driving pressure P3The main valve is driven, the opening degree of the main valve is increased, and the outlet pressure P is generated by the outlet of the pressure regulator2And the pressure rises to the original set pressure. If the pressure at the outlet of the pressure regulator P2The pressure is fed back to the lower cavity 5' at the lower side of the diaphragm 3' due to the phenomenon that the pressure is higher than the set pressure for some reason, the diaphragm 3' can move upwards and drive the central shaft 6' to move upwards, the left end of the lever 8' presses downwards, the opening between the pressure regulating valve clack 10' and the pressure regulating valve seat 12' is reduced, and the driving force P is3Will drop, the opening of the main valve will decrease, and the pressure at the outlet of the pressure regulator will dropAnd the original set pressure is restored. When the outlet pressure P of the pressure regulator2When the closing pressure is reached, the upward displacement of the diaphragm 3 'is too great, which completely closes the gap between the pressure regulating valve flap 10' and the pressure regulating valve seat 12 'and pulls up the discharge valve flap 11', causing the driving force P3By P2The pipeline is completely diffused to the outlet of the pressure regulator, and the pressure regulator can be closed when the main valve of the pressure regulator has no driving force.
The opening and closing requirements of the pressure regulating valve clack 10 'of the commander are synchronous with the closing and opening of the discharge valve clack 11', the synchronism of the existing commander is solved by adjusting an adjusting screw 9 'at one end of a lever 8', but the adjusting screw 9 'is positioned below a diaphragm 3' of the commander, and the upper shell 1 'needs to be opened, a spring needs to be removed, the diaphragm 3' needs to be removed, and the like during adjustment, so that the maintenance and adjustment of the commander are difficult.
Disclosure of Invention
The invention aims to provide a director for a gas pressure regulator, which can solve the technical problem that the existing director is difficult to maintain and adjust.
In order to achieve the above object, the present invention provides a director for a gas pressure regulator, comprising an upper housing, a lower housing fixedly connected with the upper housing, a diaphragm fixed between the upper housing and the lower housing, a valve stem mounted on the diaphragm, a first pressure regulating spring for providing a downward pressure to the diaphragm, a discharge valve seat fixed on the lower housing, a discharge valve flap slidably fitted over the valve stem, a discharge spring for driving the discharge valve flap to move downward to close a discharge opening between the discharge valve seat and the discharge valve flap, a pressure regulating valve seat mounted on the lower housing, a pressure regulating valve flap fitted with the pressure regulating valve seat, a second pressure regulating spring for driving the pressure regulating valve flap to move upward to close a pressure regulating opening between the pressure regulating valve seat and the pressure regulating valve flap, and a bottom cover detachably mounted on the lower housing, the diaphragm divides an inner cavity between the upper shell and the lower shell into an upper cavity and a lower cavity; the cavity between the diaphragm and the discharge valve seat is a first cavity, the cavity between the discharge valve seat and the pressure regulating valve seat is a second cavity, and the pressure regulating valve seatThe cavity before the bottom cover is a third cavity, the discharge opening is communicated with the first cavity and the second cavity, the pressure regulating opening is communicated with the second cavity and the third cavity, the first cavity is communicated with the main valve outlet pressure P of the pressure regulator2Said second cavity providing a driving pressure P3The third cavity is communicated with a pressure stabilizing pressure P4The valve rod is provided with a limiting piece which is positioned below the discharge valve clack, and when the valve rod moves upwards, the limiting piece can push the discharge valve clack to move upwards so as to open the discharge opening; when the valve rod moves downwards, the lower end of the valve rod can push the pressure regulating valve clack to move downwards to open the pressure regulating opening.
Preferably, the pressure regulating valve seat passes through threaded connection and is in on the casing down, the through-hole of intercommunication about the pressure regulating valve seat has, the pressure regulating valve clack is installed with sliding from top to bottom in the through-hole of pressure regulating valve seat, the upper end of second pressure regulating spring is in on the lower terminal surface of pressure regulating valve clack, the lower extreme of second pressure regulating spring is pressed on the bottom cover, be provided with the draw-in groove that is used for joint rotary tool on the pressure regulating valve seat.
Preferably, the clamping groove is a linear transverse groove formed in the lower end face of the pressure regulating valve seat.
Preferably, the bottom passes through threaded connection and is in on the casing down, the up end of bottom is seted up and is used for the location the constant head tank of second pressure regulating spring, the lower extreme of second pressure regulating spring is located in the constant head tank of bottom, the lower extreme of bottom has the flange, the ring channel has been seted up to the up end of flange, works as the bottom is installed when on the casing down, the up end of flange with the lower terminal surface contact of casing down, be provided with the sealing washer in the ring channel.
Preferably, the valve rod is big-end-up's shoulder shaft, the through-hole of pressure regulating disk seat is the shoulder hole, the pressure regulating valve clack is located in the macropore of the shoulder hole of pressure regulating disk seat, the tip of valve rod pass the aperture of the shoulder hole of pressure regulating disk seat and with the upper end contact of pressure regulating valve clack.
Preferably, the limiting member is a circlip fixed to the valve rod.
Preferably, the orifice is a gap between the discharge flap and the valve stem.
Preferably, the upper end threaded connection of going up the casing has adjusting bolt, the lower extreme of first pressure regulating spring with the upper end of valve rod is connected, the connecting plate is installed to the upper end of first pressure regulating spring, adjusting bolt's upper end is located go up the casing outside, adjusting bolt's lower extreme is pressed on the connecting plate.
Preferably, the adjusting bolt is arranged coaxially with the valve stem.
Preferably, the lower end of the adjusting bolt is hemispherical, a hemispherical groove is formed in the connecting plate, and the lower end of the adjusting bolt is located in the hemispherical groove of the connecting plate.
The pilot for the gas pressure regulator is characterized in that a bottom cover is detachably mounted on a lower shell of the pilot for the gas pressure regulator, a third cavity is formed between the bottom cover and a pressure regulating valve seat, the pressure regulating valve seat is mounted in an inner hole of the lower shell, when the relative position relation between the pressure regulating valve clack and a valve rod needs to be adjusted to adjust the synchronism of the pressure regulating valve clack and a discharge valve clack, the pilot can be operated only by detaching the bottom cover, and compared with an adjusting mode that parts such as an upper shell and a diaphragm need to be detached in the existing pilot, the pilot is convenient and simple to operate. Therefore, the director for the gas pressure regulator provided by the invention can solve the technical problem that the existing director is difficult to maintain and adjust.
Drawings
Fig. 1 is a schematic structural view (in cross section) of a conventional pilot for a gas pressure regulator;
fig. 2 is a schematic structural view (in section) of a director for a gas pressure regulator of a preferred embodiment provided by the present invention;
FIG. 3 is an enlarged view of the pressure regulating flap position of the commander shown in FIG. 2 (the pressure regulating opening in a closed state);
FIG. 4 is an enlarged view of the pressure regulating flap position of the commander shown in FIG. 3 (the pressure regulating opening in an open state);
in the drawings, the reference numerals denote the following components:
1-an upper shell; 2-a lower shell; 3-a membrane; 4-a first pressure regulating spring; 5-valve stem; 6-discharge valve seat; 7-discharge valve flap; 8-a discharge spring; 9-pressure regulating valve seat; 10-a pressure regulating valve flap; 11-a second pressure regulating spring; 12-a bottom cover; 13-upper chamber; 14-a first cavity; 15-a second cavity; 16-a third cavity; 17-a limit stop; 18-a connecting plate; 19-adjusting the bolt.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 2, the director for a gas pressure regulator according to a basic embodiment of the present invention includes an upper housing 1, a lower housing 2 fixedly connected to the upper housing 1, a diaphragm 3 fixed between the upper housing 1 and the lower housing 2, a valve rod 5 mounted on the diaphragm 3, a first pressure regulating spring 4 for providing a downward pressure to the diaphragm 3, a discharge valve seat 6 fixed on the lower housing 2, a discharge valve flap 7 slidably fitted over the valve rod 5, a discharge spring 8 for driving the discharge valve flap 7 to move downward to close a discharge opening between the discharge valve seat 6 and the discharge valve flap 7, a pressure regulating valve seat 9 mounted on the lower housing 2, a pressure regulating valve flap 10 engaged with the pressure regulating valve seat 9, a second pressure regulating spring 11 for driving the pressure regulating valve flap 10 to move upward to close a pressure regulating opening between the pressure regulating valve seat 9 and the pressure regulating valve flap 10, and a second pressure regulating spring 11 detachably mounted on the lower housing 2 And a bottom cover 12.
Wherein go up casing 1 and casing 2 down can be in the same place through bolt fixed connection, and diaphragm 3 can adopt the diaphragm of current commander, for example diaphragm 3 can adopt and accompany the rubber preparation of chemical fibre silk cloth, and the texture is softer, can convert the pressure change that feels on the diaphragm 3 into the displacement of valve rod 5. The outer edge of diaphragm 3 is fixed between the lower extreme edge of last casing 1 and the upper end edge of casing 2 down, and the middle part of diaphragm 3 passes through fixing base and valve rod 5 fixed connection. The fixing seat can comprise a supporting plate fixed on the valve rod 5 and a tray sleeved on the valve rod 5, the upper end of the valve rod 5 penetrates through the diaphragm 3, the diaphragm 3 is located between the supporting plate and the tray and tightly presses the diaphragm 3 through the supporting plate and the tray, and the tray is fastened through a nut screwed at the upper end of the valve rod 5.
Wherein the diaphragm 3 divides the inner cavity between the upper housing 1 and the lower housing 2 into an upper cavity 13 and a lower cavity. Wherein said first pressure regulating spring 4 is adapted to provide a downward pressure to the membrane 3, preferably arranged in the upper chamber 13. As shown in fig. 2, the discharge valve seat 6 is mounted on the bore wall of the inner bore of the lower housing 2, the discharge valve flap 7 is slidably fitted over the valve stem 5, and a discharge opening is formed between the lower end face of the discharge valve flap 7 and the upper end face of the discharge valve seat 6. The discharge valve clack 7 is slidably sleeved on the valve rod 5, and comprises that an inner hole of the discharge valve clack 7 is not in contact with the valve rod 5, and also comprises that an inner hole of the discharge valve clack 7 is partially in contact with the valve rod 5, or is in sliding connection through other structures. The discharge spring 8 is used for driving the discharge valve flap 7 to move downwards to close the discharge opening, and because the discharge valve flap 7 is slidably sleeved on the valve rod 5, the discharge valve flap 7 moves downwards on the valve rod 5 to close the discharge opening under the driving of the discharge spring 8. The discharge spring 8 may be a tension spring or a compression spring, and when the tension spring is used, the tension spring is located at the lower end of the discharge valve flap 7, and the upper end is connected to the discharge valve flap 7 and the lower end is connected to the lower case 2, thereby providing elastic force so that the discharge valve flap 7 moves down. Preferably, as shown in fig. 2, the discharge spring 8 is a compression spring and is disposed above the discharge valve flap 7, a bracket is fixedly mounted at an opening at the upper end of the inner hole of the lower housing 2, the upper end of the discharge spring 8 is connected with the bracket, and the lower end is connected with the discharge valve flap 7. The bracket may guide the valve stem 5 by providing a guide hole therein.
Wherein the valve rod 5 is provided with a limiting member 17, the limiting member 17 is located below the discharge valve flap 7, the position of the limiting member 17 on the valve rod 5 is fixed, and when the valve rod 5 moves upwards, the limiting member 17 moves upwards along with the valve rod, so that the discharge valve flap 7 can be pushed to move upwards to open the discharge opening. The limiting member 17 may be an annular protrusion disposed on the valve stem 5, and preferably, as shown in fig. 2, the limiting member 17 is a circlip fixed on the valve stem 5.
Wherein pressure regulating valve clack 10 is installed on the pore wall of the hole of casing 2 down, pressure regulating valve clack 10 can be fixed on casing 2 down through various modes detachably, for example, pressure regulating valve clack 10 can threaded connection in the hole of casing 2 down, perhaps installs the snap ring in the hole of casing 2 down, and pressure regulating valve clack 10 is fixed on casing 2 down.
Diaphragm 3 with it is first cavity 14 to discharge the cavity between the disk seat 6, it is second cavity 15 to discharge the cavity between disk seat 6 and the pressure regulating disk seat 9, pressure regulating disk seat 9 with the cavity before bottom 12 is third cavity 16, discharge the opening intercommunication first cavity 14 and second cavity 15, the pressure regulating opening intercommunication second cavity 15 and third cavity 16. The first cavity 14 is communicated with the outlet pressure P of the main valve of the pressure regulator2The outlet pressure P of the main valve of the pressure regulator can be realized by installing a pipe joint on the lower shell 22Is connected to the first cavity 14. The second cavity 15 provides a driving pressure P3The driving pressure P3It may be connected to the main valve of the regulator by means of a pipe joint provided on the lower housing 2. The third cavity 16 is communicated with a pressure stabilizing pressure P4The pressure P of the pressure stabilization4The voltage regulator is provided by a conventional voltage regulator, for example, a voltage regulator disclosed in patent document CN 111998109A. Wherein the voltage stabilizer can be integrated on the lower shell 2, the stabilized pressure P of the voltage stabilizer4May be connected to the third chamber 16 through an aperture in the lower housing 2. The lower extreme of valve rod 5 can contact with the upper end of pressure regulating valve clack 10, works as when valve rod 5 moves down, the lower extreme of valve rod 5 can promote pressure regulating valve clack 10 moves down is in order to open the pressure regulating opening.
The above-described basic embodiment provides that the pilot for a gas pressure regulator, in normal operation, the forces on both sides of the membrane 3 are balanced if the outlet pressure P of the main valve of the regulator is such that2A sub-set pressure occurs for some reason, which pressure is fed back into the first cavity 14 on the lower side of the membrane 3, so that the force on the upper side of the membrane 3 is greater than on the lower sideThe diaphragm 3 will generate downward displacement, the valve rod 5 fixed on the diaphragm 3 also displaces downward, the lower end of the valve rod 5 is pressed on the pressure regulating valve clack 10 and pushes the pressure regulating valve clack 10 to move downward, so that the opening degree of a pressure regulating opening between the pressure regulating valve clack 10 and the pressure regulating valve seat 9 is increased, as shown in figure 4, the pressure loss of the third cavity 16 flowing into the second cavity 15 is reduced, and the driving pressure P is further reduced3The pressure rises, the opening degree of the driving main valve is increased, and the outlet pressure P of the pressure regulator main valve2The pressure is increased to the original set pressure; if the outlet pressure P of the main valve of the pressure regulator2The outlet pressure P is higher than the set pressure for some reason2The pressure is fed back to the first cavity 14 on the lower side of the diaphragm 3, so that the acting force on the lower side of the diaphragm is greater than that on the upper side, the diaphragm 3 can generate upward displacement, the valve rod 5 fixed on the diaphragm 3 also moves upwards along with the acting force, the pressure regulating valve clack 10 on the lower end of the valve rod 5 moves upwards along with the acting force of the second pressure regulating spring 11, the opening degree of a pressure regulating opening between the pressure regulating valve clack 10 and the pressure regulating valve seat 9 is reduced, the pressure loss of the third cavity 16 flowing into the second cavity 15 is increased, and the driving pressure P is further reduced3Reducing the opening of the main driving valve to reduce the outlet pressure P of the main valve of the pressure regulator2Will drop to the original set pressure; when the outlet pressure P of the pressure regulator2Too high, when the closing pressure is reached, the upward displacement of the diaphragm 3 is too large, the lower end of the valve rod 5 is separated from the pressure regulating valve flap 10, or as shown in fig. 3, the lower end of the valve rod 5 is close to the pressure regulating valve flap 10 (at this time, the common acting force of the valve rod and the pressure regulating valve seat on the pressure regulating valve flap is balanced with the acting force of the pressure regulating spring on the pressure regulating valve flap), the pressure regulating opening between the pressure regulating valve flap 10 and the pressure regulating valve seat 9 is completely closed, meanwhile, the limiting part 17 on the valve rod 5 pulls up the discharge valve flap 7, so that the discharge opening between the discharge valve flap 7 and the discharge valve seat 6 is opened, at this time, the second cavity 15 is communicated with the first cavity 14, the second cavity 15 is not communicated with the third cavity 16, and the driving pressure P is enabled to be not communicated with the third cavity 163Enter the first cavity 14 of diaphragm 3 below through discharging the opening to all diffuse to the export of voltage regulator main valve along the pipeline, like this, the voltage regulator main valve does not have drive power, and the voltage regulator can close.
The invention is used in the discharge valve flap 7 and pressure regulating valve flap 10 of the pilot of the gas pressure regulator to share the same valve stem 5 mechanical linkage, discharge valve flap 7 and valve stem 5 are connected slidably, when the pressure regulating valve flap 10 works normally, discharge valve flap 7 is closed, the stop member 17 is disengaged from contacting the discharge valve flap 7, only the pressure regulating valve flap 10 is closed or outlet pressure P2When the closing pressure is reached, the limiting piece 17 is contacted with the discharge valve flap 7, so the accuracy of the linkage needs to adjust the upper and lower positions of the pressure regulating valve seat 9. According to the invention, the bottom cover 12 is detachably arranged on the lower shell 2 of the commander, the third cavity 16 is formed between the bottom cover 12 and the pressure regulating valve seat 9, the pressure regulating valve seat 9 is arranged in the inner hole of the lower shell 2, when the relative position relation between the pressure regulating valve clack 10 and the valve rod 5 needs to be adjusted to adjust the synchronism of the pressure regulating valve clack 10 and the discharge valve clack 7 (the opening and closing of the pressure regulating valve clack are synchronous with the closing and opening of the discharge valve clack), the operation can be realized only by disassembling the bottom cover 12, and compared with the adjusting mode of disassembling the upper shell, the membrane and other parts of the existing commander, the operation is convenient and simple.
In the present invention, preferably, as shown in fig. 2, the pressure regulating valve seat 9 is connected to the lower housing 2 by a screw thread, the pressure regulating valve seat 9 has a through hole communicated up and down, the pressure regulating valve flap 10 is slidably installed in the through hole of the pressure regulating valve seat 9 up and down, the upper end of the second pressure regulating spring 11 is pressed on the lower end surface of the pressure regulating valve flap 10, the lower end of the second pressure regulating spring 11 is pressed on the bottom cover 12, and a clamping groove for clamping a rotary tool is provided on the pressure regulating valve seat 9. The pressure regulating valve seat 9 and the valve rod 5 are preferably coaxially arranged. When the relative position relationship between the pressure regulating valve clack 10 and the valve rod 5 needs to be adjusted, the bottom cover 12 is only required to be detached, and then the pressure regulating valve clack 10 is rotated. The draw-in groove can adopt current various draw-in grooves, for example cross draw-in groove, interior hexagonal draw-in groove, a line transverse groove etc. the preferred adoption of draw-in groove is seted up the linear transverse groove on the terminal surface under the pressure regulating disk seat 9, rotary tool chooses a line screwdriver for use this moment.
When pressure regulating valve clack 10 adopts other modes detachably to fix on casing 2 down, for example the above when fixing pressure regulating valve clack 10 on casing 2 down through the snap ring, only need adjust the snap ring in 2 hole of casing down the position or install the snap ring of different thickness, can adjust the relative position relation of pressure regulating valve clack 10 and valve rod 5.
In the present invention, the bottom cover 12 may be fixed on the lower housing 2 in various detachable manners, and in a preferred embodiment, as shown in fig. 2, the bottom cover 12 is connected to the lower housing 2 by a screw thread, a positioning groove for positioning the second pressure regulating spring 11 is opened on an upper end surface of the bottom cover 12, a lower end of the second pressure regulating spring 11 is located in the positioning groove of the bottom cover 12, a lower end of the bottom cover 12 has a flange, an upper end surface of the flange is opened with an annular groove, when the bottom cover 12 is mounted on the lower housing 2, an upper end surface of the flange contacts with a lower end surface of the lower housing 2, and a sealing ring is disposed in the annular groove.
As shown in fig. 2 and 3, in a preferred embodiment of the present invention, the valve rod 5 is a stepped shaft having a large top and a small bottom, the through hole of the pressure regulating valve seat 9 is a stepped hole, the pressure regulating valve flap 10 is located in the large hole of the stepped hole of the pressure regulating valve seat 9, and the small end of the valve rod 5 passes through the small hole of the stepped hole of the pressure regulating valve seat 9 and contacts with the upper end of the pressure regulating valve flap 10. The annular area between the small end of the valve rod 5 and the small hole of the stepped hole of the pressure regulating valve seat 9 can be used as a flow passage of the fuel gas. Through being big-end-up's step shaft with valve rod 5, step (main aspects and tip hookup location) on the valve rod 5 can press pressure regulating valve clack 10 to the lower extreme the time with pressure regulating valve seat 9's upper end contact at valve rod 5 to play limiting displacement, avoid pressure regulating valve clack 10 excessive removal downwards and damage second pressure regulating spring 11.
In the present invention, the orifice may be opened in the lower case 2 to connect the first chamber 14 and the second chamber 15. Preferably, the orifice is a clearance between the discharge flap 7 and the valve stem 5 (which may be achieved by choosing an appropriate clearance fit tolerance). The discharge flap 7 is arranged coaxially with the valve rod 5. By setting the gap between the discharge flap 7 and the valve stem 5 as an orifice, it is possible to cause a gas flow between the discharge flap 7 and the valve stem 5, thereby allowing smoother movement between the discharge flap 7 and the valve stem 5.
In order to adjust the elastic force of the first pressure regulating spring 4 conveniently, as shown in fig. 2, an adjusting bolt 19 is connected to the upper end of the upper housing 1 in a threaded manner, the lower end of the first pressure regulating spring 4 is connected to the upper end of the valve rod 5, a connecting plate 18 is installed at the upper end of the first pressure regulating spring 4, the upper end of the adjusting bolt 19 is located on the outer side of the upper housing 1, and the lower end of the adjusting bolt 19 is pressed on the connecting plate 18. By rotating the adjusting bolt 19, the connecting plate 18 is moved downward, so that the elastic force of the first pressure adjusting spring 4 can be easily adjusted to change the set value of the outlet pressure P2 of the main valve of the pressure regulator, and the set value of the outlet pressure P2 of the pressure regulator is increased as the elastic force of the first pressure adjusting spring 4 is increased.
As shown in fig. 2, the adjusting bolt 19 is preferably arranged coaxially with the valve stem 5. The lower end of the adjusting bolt 19 is hemispherical, a hemispherical groove is formed in the connecting plate 18, and the lower end of the adjusting bolt 19 is located in the hemispherical groove of the connecting plate 18. The lower end of the adjusting bolt 19 is hemispherical, and the connecting plate 18 is provided with a hemispherical groove, so that the influence on the diaphragm 3 and the valve rod 5 can be reduced when the elastic force of the first pressure regulating spring 4 is adjusted, and the stability of the director is improved.
The pilot device for the gas pressure regulator provided by the invention has the advantages that the discharge valve clack 7 and the pressure regulating valve clack 10 are arranged on the same axis, and the discharge valve clack 7 and the pressure regulating valve clack 10 are mechanically linked by the same valve rod 5, so that main parts are assembled on the same axis without a lever structure.
In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, integral connections, or the presence of intervening components. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.

Claims (10)

1. The utility model provides a commander for gas pressure regulator, its characterized in that, including last casing (1), with go up casing (1) fixed connection's lower casing (2), fix go up diaphragm (3) between casing (1) and the lower casing (2), install valve rod (5) on diaphragm (3), do diaphragm (3) provide first pressure regulating spring (4) of decurrent pressure, fix discharge disk seat (6), the ground suit of sliding on casing (2) down discharge valve clack (7) on valve rod (5), be used for the drive discharge valve clack (7) downstream in order to close discharge disk seat (6) and discharge opening's between the valve clack (7) discharge spring (8), install disk seat (9) on casing (2) down, with pressure regulating valve seat (9) matched with pressure regulating valve clack (10), Used for driving the pressure regulating valve clack (10) to move upwards so as to seal the pressure regulating valve between the pressure regulating valve seat (9) and the pressure regulating valve clack (10)The diaphragm (3) divides an inner cavity between the upper shell (1) and the lower shell (2) into an upper cavity (13) and a lower cavity; diaphragm (3) with cavity of discharging between disk seat (6) is first cavity (14), discharge disk seat (6) and the cavity between pressure regulating disk seat (9) is second cavity (15), pressure regulating disk seat (9) with cavity before bottom (12) is third cavity (16), discharge opening intercommunication first cavity (14) and second cavity (15), pressure regulating opening intercommunication second cavity (15) and third cavity (16), first cavity (14) intercommunication voltage regulator main valve outlet pressure P2The second cavity (15) provides a driving pressure P3The third cavity (16) is communicated with a pressure stabilizing pressure P4The valve rod (5) is provided with a limiting piece (17), the limiting piece (17) is positioned below the discharge valve flap (7), and when the valve rod (5) moves upwards, the limiting piece (17) can push the discharge valve flap (7) to move upwards to open the discharge opening; when the valve rod (5) moves downwards, the lower end of the valve rod (5) can push the pressure regulating valve flap (10) to move downwards to open the pressure regulating opening.
2. The director for a gas pressure regulator according to claim 1, characterized in that, the pressure regulating valve seat (9) is connected on the lower casing (2) through screw thread, the pressure regulating valve seat (9) has the through-hole that communicates from top to bottom, the pressure regulating valve flap (10) is installed in the through-hole of pressure regulating valve seat (9) with sliding from top to bottom, the upper end of second pressure regulating spring (11) is pressed on the lower terminal surface of pressure regulating valve flap (10), the lower extreme of second pressure regulating spring (11) is pressed on bottom cover (12), be provided with the draw-in groove that is used for joint rotary tool on the pressure regulating valve seat (9).
3. The pilot device for a gas pressure regulator according to claim 2, characterized in that said clamping groove is a horizontal groove provided on the lower end surface of said pressure regulating valve seat (9).
4. The pilot device for a gas pressure regulator according to claim 2, wherein the bottom cap (12) is screwed onto the lower casing (2), a positioning groove for positioning the second pressure regulating spring (11) is formed in an upper end surface of the bottom cap (12), a lower end of the second pressure regulating spring (11) is located in the positioning groove of the bottom cap (12), a flange is formed in a lower end of the bottom cap (12), an annular groove is formed in an upper end surface of the flange, and when the bottom cap (12) is mounted on the lower casing (2), the upper end surface of the flange contacts with a lower end surface of the lower casing (2), and a sealing ring is disposed in the annular groove.
5. The pilot of claim 2, characterized in that the valve rod (5) is a stepped shaft with a large upper end and a small lower end, the through hole of the pressure regulating valve seat (9) is a stepped hole, the pressure regulating valve flap (10) is located in the large hole of the stepped hole of the pressure regulating valve seat (9), and the small end of the valve rod (5) passes through the small hole of the stepped hole of the pressure regulating valve seat (9) and contacts with the upper end of the pressure regulating valve flap (10).
6. Commander for gas pressure regulators according to claim 1, characterized in that said stop (17) is a circlip fixed to said valve stem (5).
7. Pilot for a gas pressure regulator according to claim 1, characterized in that the gap between the discharge flap (7) and the valve stem (5) is an orifice.
8. The commander for a gas pressure regulator according to claim 1, characterized in that the upper end of the upper housing (1) is threadedly connected with an adjusting bolt (19), the lower end of the first pressure regulating spring (4) is connected with the upper end of the valve rod (5), a connecting plate (18) is installed at the upper end of the first pressure regulating spring (4), the upper end of the adjusting bolt (19) is located outside the upper housing (1), and the lower end of the adjusting bolt (19) is pressed on the connecting plate (18).
9. A command element for a gas pressure regulator according to claim 8, characterized in that said adjusting bolt (19) is arranged coaxially to said valve stem (5).
10. The commander for a gas pressure regulator according to claim 9, wherein the lower end of the adjusting bolt (19) is hemispherical, a hemispherical groove is provided on the connecting plate (18), and the lower end of the adjusting bolt (19) is located in the hemispherical groove of the connecting plate (18).
CN202011561583.7A 2020-12-25 2020-12-25 A commander for gas pressure regulator Active CN112747155B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810909B2 (en) * 2002-08-08 2004-11-02 Eaton Corporation Solenoid operated pressure control valve
CN201462123U (en) * 2009-04-30 2010-05-12 北京市科海龙华工业自动化仪器有限公司 Pneumatic pressure-stabilizing pressure regulation valve
CN103174858B (en) * 2013-04-15 2015-10-28 四川嘉星燃气设备制造有限公司 Integration cutting type pressure regulator
CN203230933U (en) * 2013-05-19 2013-10-09 河北永良燃气设备有限公司 Pilot valve
CN205938114U (en) * 2016-06-30 2017-02-08 重庆市山城燃气设备有限公司 Voltage regulator subassembly
CN209654713U (en) * 2019-03-27 2019-11-19 重庆市久庆仪器仪表有限公司 The pilot valve of pressure reducing valve
CN210461829U (en) * 2019-09-21 2020-05-05 河北永良燃气设备有限公司 Pressure stabilizing director for gas pressure regulator

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Denomination of invention: A Command Device for Gas Pressure Regulators

Granted publication date: 20220401

Pledgee: China Zheshang Bank Co.,Ltd. Changzhou Branch

Pledgor: Jiangsu Shengwei Gas Technology Co.,Ltd.

Registration number: Y2024980002408