CN215110757U - Command valve for pressure regulator - Google Patents
Command valve for pressure regulator Download PDFInfo
- Publication number
- CN215110757U CN215110757U CN202121449970.1U CN202121449970U CN215110757U CN 215110757 U CN215110757 U CN 215110757U CN 202121449970 U CN202121449970 U CN 202121449970U CN 215110757 U CN215110757 U CN 215110757U
- Authority
- CN
- China
- Prior art keywords
- pressure
- chamber
- valve
- pressure regulating
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of gas transmission and distribution control, in particular to a command valve for a pressure regulator, which comprises a command valve body, wherein a second-stage valve rod is arranged on the command valve body, an air inlet channel and an air outlet channel are arranged on the second-stage valve rod, a first cavity arranged on one side of the second-stage valve rod and a second cavity arranged on the other side of the second-stage valve rod are arranged on the command valve body, and a pressure regulating seat is sleeved on the outer side of the second-stage valve rod; a low-pressure stop spring, a secondary valve clack, a feedback diaphragm pressing plate and a feedback diaphragm are arranged in the first chamber; a pressure regulating leather diaphragm, a pressure regulating leather diaphragm pressing plate and a pressure regulating spring are arranged in the second chamber; the commanding valve body is provided with a first air inlet communicated with the second chamber. The problem that the operator needs to go to the scene and carry out manual setting and adjust the pressure value is solved to this scheme.
Description
Technical Field
The utility model relates to a gas transmission and distribution control technical field, concretely relates to command valve for pressure regulator.
Background
Natural gas has been completely integrated into a plurality of aspects of social production and life, has more and more important functions, and provides important energy support for high-speed operation of modern human society like fuel oil and electric power. Therefore, the society puts forward higher and higher requirements on natural gas in each link of exploration, exploitation and transmission and distribution, and particularly in the link of transmission and distribution, the stability and the persistence of a gas source directly influence the quality of life of residents and influence the quality and the cost control of industrial users.
In the natural gas transmission and distribution project, the self-operated pressure regulator is used as an indispensable control valve, forms a simplest and effective pressure reduction and stabilization standard distribution model together with a shut-off valve and a safety valve, bears the requirements of different users on various gas pressures, however, the self-operated pressure regulator is a throttling and pressure reduction unit which performs self-regulation on the opening degree of the valve according to the pressure change of the rear end or the front end of a gas pipeline, so that the pressure regulated by the self-operated pressure regulator is determined to be basically stabilized at a set value and only slightly changed on or under the set value, the self-operated pressure regulator can output the requirement of stable pressure under the condition of no external interference, and the self-operated pressure regulator is also an essential attribute of the self-operated pressure regulator.
The characteristic of outputting stable pressure value of the self-operated pressure regulator is not only the outstanding advantage, but also the disadvantage. With the development of the diversity of gas application scenes, more and more industrial fields and even downstream pipe networks may need to provide different pressures at different times so as to achieve the purposes of deployment, storage and the like. However, the pressure value output by the self-operated pressure regulator is stable without being interfered by external factors, and if the pressure different from the set value needs to be provided downstream, the set value needs to be manually reset by an operator on site, which brings workload to the operator. Especially when wide-range output pressures are required downstream, the field operators will often go to the field for manual settings, which adds significant effort, time and effort to them.
Therefore, the inventor researches and designs the remote control self-operated pressure regulator, and the remote control self-operated pressure regulator is remotely set and controlled through a command control unit of the remote control self-operated pressure regulator, so that the output pressure value of the remote control self-operated pressure regulator is remotely set and controlled according to downstream demand changes, the workload of an operator can be reduced when people effectively manage gas output, and the working comfort and the working efficiency are improved.
The remote control self-operated pressure regulator comprises a terminal control part, a command valve part and a main valve body part. The terminal control part controls the command valve part, and the command valve part controls the main valve body part, so that the gas output pressure on the main valve body is controlled. Wherein, the command valve part is that remote control self-operated voltage regulator realizes that above-mentioned remote control, operator need not to go on the scene and carry out the indispensable spare part of manual settlement, the utility model discloses aim at carrying out detailed explanation and protection to the command valve part.
SUMMERY OF THE UTILITY MODEL
The utility model provides a command valve for pressure regulator to solve the operator and need carry out manual settlement to the scene and carry out the problem adjusted to the pressure value.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a command valve for a pressure regulator comprises a command valve body, wherein a secondary valve rod is arranged on the command valve body, an air inlet channel and an air outlet channel are arranged on the secondary valve rod, a first cavity positioned on one side of the secondary valve rod and a second cavity positioned on the other side of the secondary valve rod are arranged on the command valve body, and a pressure regulating seat is sleeved on the outer side of the secondary valve rod; a low-pressure stop spring, a secondary valve clack, a feedback diaphragm pressing plate and a feedback diaphragm are arranged in the first cavity, the middle part of the feedback diaphragm is fixed on the secondary valve clack through the feedback diaphragm pressing plate, the outer edge of the feedback diaphragm is fixed on the inner wall of the first cavity, one end of the low-pressure stop spring is fixed on the end part, far away from the secondary valve rod, of the first cavity, the other end of the low-pressure stop spring is fixed on the feedback diaphragm pressing plate, the secondary valve clack can abut against the air outlet end of the air inlet channel, and the secondary valve clack is fixed on a pressure regulating seat positioned on the part of the first cavity; the pressure regulating leather diaphragm, the pressure regulating leather diaphragm pressing plate and the pressure regulating spring are arranged in the second chamber, the middle part of the pressure regulating leather diaphragm is fixed on the position, located in the second chamber, of the pressure regulating seat through the pressure regulating leather diaphragm pressing plate, the outer edge of the pressure regulating leather diaphragm is fixed on the inner wall of the second chamber, and the pressure regulating spring is connected between the pressure regulating leather diaphragm pressing plate and the end part, far away from the secondary valve rod, of the second chamber; the commanding valve body is provided with a first air inlet communicated with the second chamber.
The principle and the advantages of the scheme are as follows: in the scheme, the air outlet end of the air outlet channel is used for being connected with the execution part of the main valve body, and dynamic load is provided for the execution part of the main valve body. The first air inlet is used for being connected with an external remote control terminal control part, and the terminal control part provides remote loading pressure P into the second chamber through the first air inletT。
At ordinary times, the force of the pressure-adjusting seat in the first chamber and the force of the pressure-adjusting seat in the second chamber are in dynamic balance, so that the opening degree of a throttling port at the secondary valve clack is controlled, the size of a dynamic load entering an execution part of the main valve body is controlled, and the downstream output pressure on the main valve body is controlled.
In the scheme, when the pressure P is remotely loadedTWhen the pressure difference between the two valve clacks is increased, the dynamic balance between the pressure regulating seat force in the first chamber and the pressure regulating seat force in the second chamber is broken, the pressure regulating seat force in the second chamber is greater than the pressure regulating seat force in the first chamber, the pressure regulating seat drives the two valve clacks to move towards the first chamber, the opening degree of the throttling port at the two valve clacks is increased, and the generated load pressure P is increasedLAnd increases, thereby controlling the downstream output pressure from the main valve body to increase or decrease.
When remotely loaded with pressure PTWhen the pressure of the second chamber is reduced, the dynamic balance between the pressure regulating seat force and the pressure regulating seat force in the first chamber is broken, the pressure regulating seat force in the second chamber is smaller than the pressure regulating seat force in the first chamber, the pressure regulating seat drives the second valve clack to move towards the second chamber, the opening degree of a throttling opening at the second valve clack is reduced, and the generated load pressure P is generatedLAnd decreases accordingly, thereby controlling the downstream output pressure from the main valve body to decrease or increase.
Therefore, the command valve in the scheme can load pressure P according to remote loadTTo control the position of execution of the main valve body, fromThe pressure regulation of the gas on the main valve body flowing to the downstream pipeline is realized, the labor intensity of an operator can be furthest released, and the operator can set the outlet pressure P at the monitoring end of the control center as required at any time2And the time and labor are not needed to be wasted to the field of the equipment for adjustment, the difficulty and frequency of field operation are reduced, and the work adaptability and comfort of an operator are greatly improved.
Preferably, as an improvement, the commanding valve body is in threaded connection with an adjusting screw rod, one end of the adjusting screw rod is located in the second chamber, the other end of the adjusting screw rod is located outside the commanding valve body, a spring seat is slidably connected inside the second chamber, one end, far away from the secondary valve rod, of the adjusting spring is fixedly located on the spring seat, and one end, located in the second chamber, of the adjusting screw rod abuts against the spring seat.
From this, rotate adjusting screw through manual to drive the spring holder and remove, the removal of spring holder can change the deformation volume of pressure regulating spring, thereby adjusts pressure regulating spring's elasticity. When the adjusting screw rod rotates towards the direction close to the spring seat to further increase the compression amount of the pressure adjusting spring, the dynamic balance between the force to the pressure adjusting seat in the first chamber and the force to the pressure adjusting seat in the second chamber is broken, the force to the pressure adjusting seat in the second chamber is larger than the force to the pressure adjusting seat in the first chamber, the pressure adjusting seat drives the secondary valve clack to move towards the first chamber under the pushing of the pressure adjusting spring, the opening degree of a throttle opening at the secondary valve clack is increased, and the generated load pressure P is increasedLAnd increases, thereby controlling the downstream output pressure from the main valve body to increase or decrease. When the adjusting screw is screwed out in the direction far away from the spring seat to reduce the compression amount of the pressure adjusting spring, the dynamic balance between the force on the pressure adjusting seat in the first chamber and the force on the pressure adjusting seat in the second chamber is broken, the force on the pressure adjusting seat in the second chamber is smaller than the force on the pressure adjusting seat in the first chamber, the pressure adjusting seat drives the secondary valve clack to move towards the second chamber, the opening degree of a throttle orifice at the secondary valve clack is reduced, and the generated load pressure P is reducedLAnd decreases accordingly, thereby controlling the downstream output pressure from the main valve body to decrease or increase. Therefore, through the scheme, the command valve not only depends on the remote loading pressure PTIs adjusted, andcan be adjusted manually, and the command valve has the function of manual adjustment.
Preferably, as an improvement, the command valve body is provided with a second air inlet communicated with the first chamber.
The second air inlet is used for communicating with the downstream pipeline of the fuel gas pipeline in the scheme. The gas of the downstream pipeline of the gas pipeline enters a first chamber so as to feed back the downward pressure of the diaphragm, and the gas pressure in the first chamber is the same as that in the downstream pipeline and is P2。
When remotely loaded with pressure PTWhen the pressure is stabilized at a fixed value, if the gas pressure P of the downstream pipeline of the gas pipeline2The gas pressure in the first chamber is increased or decreased when the gas pressure is increased or decreased unexpectedly, so that the spring force and the gas pressure P generated by the low-pressure stop spring in the first chamber are enabled2With the pressure regulating spring force and the remotely loaded pressure P in the second chamberTThe resultant force generated by the pressure regulating seat is broken, the pressure regulating seat drives the second-stage valve clack to move, and the opening of the throttling opening at the second-stage valve clack is reduced or increased, so that the load pressure P generated by the command valve is increasedLDecrease or increase, thereby controlling the downstream output pressure on the main valve body to decrease or increase, and restraining the gas pressure P of the downstream pipeline of the gas pipeline2The trend of increase or reduction has realized the gas pressure automatically regulated of the low reaches pipeline of gas pipeline, is favorable to guaranteeing the stability of the gas pressure of the low reaches pipeline of gas pipeline.
Preferably, as an improvement, a first-stage valve rod is connected to the commanding valve body in a sliding manner, a gas channel is arranged on the first-stage valve rod, a third chamber is arranged on the commanding valve body, a stop membrane positioned in the third chamber is fixedly arranged on the first-stage valve rod, and the edge part of the stop membrane is fixedly connected to the inner wall of the third chamber; the third chamber is divided into a feedback chamber and a decompression chamber by the stop diaphragm, a stop spring is arranged in the feedback chamber and connected between the inner wall of the feedback chamber and the stop diaphragm, one end of the primary valve rod is positioned in the decompression chamber, the air outlet end of the gas channel is positioned in the decompression chamber, and the air inlet end of the gas inlet channel is positioned in the decompression chamber; be equipped with the end cap that admits air the chamber and plug up the chamber of admitting air on the commander valve body, be equipped with the one-level valve clack on the end cap, the one end that the decompression chamber was kept away from to the one-level valve rod can offset with the one-level valve clack, the one end that the decompression chamber was kept away from to the one-level valve rod is gas passage's inlet end, be equipped with the third inlet port with the chamber intercommunication that admits air on the commander valve body.
From this, the third air inlet is arranged in and communicates with the upstream pipeline of gas pipeline, and gas in the upstream pipeline enters into the air inlet chamber through the third air inlet, and gas enters into the gas passage through the inlet end of gas passage in the air inlet chamber, and gas enters into the decompression chamber along the gas passage, then enters into the inlet channel of second grade valve rod to the admission passage of second grade valve rod has been realized getting into gas.
In this embodiment, normally, the forces on both sides of the cut-off membrane are in a balanced state. When the opening degree of the throttling opening at the secondary valve clack is increased, the command valve needs to provide larger load pressure PLThe more gas in the decompression chamber enters into the inlet channel, the atmospheric pressure in the decompression chamber reduces, the equilibrium state of the power of ending the involucra both sides is broken, end the involucra and move to the decompression chamber direction, end the involucra and drive the removal of one-level valve rod, the tip of one-level valve rod is kept away from the one-level valve clack, the choke aperture grow of one-level valve clack department to make the gas that enters into in the gas passage become more, can make more gas enter into the inlet channel of second grade valve rod automatically. Similarly, when the opening of the throttling orifice at the secondary valve clack becomes smaller, the command valve needs to provide smaller load pressure PLThe gas that less gas entered into the inlet channel in the decompression chamber, atmospheric pressure grow in the decompression chamber, by the equilibrium state of the power of involucra both sides broken, by the involucra to the direction removal in feedback chamber, by the involucra drive one-level valve rod removal, the tip of one-level valve rod is close to one-level valve clack, the choke aperture of one-level valve clack department diminishes to make the gas that enters into the gas passage diminish, can make less gas enter into the inlet channel of second grade valve rod automatically.
Preferably, as an improvement, the command valve body is provided with a fourth air inlet communicated with the feedback cavity. The fourth gas inlet is used for mixing with fuel gasThe downstream of the conduits communicates. Gas in a downstream pipeline of the gas pipeline enters a feedback cavity, the pressure of the gas in the feedback cavity is the same as that of the gas in the downstream pipeline, and the pressure of the gas in the feedback cavity is P2. Thus, the spring force and the gas pressure P generated by the check spring in the feedback chamber2The resultant force of (A) and the gas pressure P in the decompression chamber1JResulting in dynamic equilibrium.
Thereby setting up P in the downstream pipeline2When the unexpected reduction is carried out, the opening degree of the throttling opening at the position of the secondary valve clack needs to be increased to inhibit P in a downstream pipeline2When more gas in the decompression chamber enters the gas inlet channel, the gas pressure in the decompression chamber is reduced, and the gas pressure P in the decompression chamber is reduced1JThe resultant force balance state of the spring force and the gas pressure of the stop spring in the feedback chamber is broken, and the gas pressure P in the decompression chamber1JLess than the feedback intracavity by the spring force of spring and the resultant force of gas pressure, by the involucra to the removal of decompression chamber direction, by the involucra drive one-level valve rod removal, the tip of one-level valve rod is kept away from one-level valve clack, the throttle opening grow of one-level valve clack department to make the gas that enters into in the gas passage become more, can make more gas enter into the inlet channel of second grade valve rod automatically. At this time, due to P in the downstream pipeline2The reduction, consequently the gas pressure in the feedback chamber also reduces, and the atmospheric pressure in the feedback chamber that ends the involucra both sides like this and the decompression chamber all reduces, has avoided only reducing in the pressure chamber in the twinkling of an eye and has made to stop the involucra both sides atress difference and take place great change in the twinkling of an eye and cause the one-level valve rod to move comparatively acutely and damage.
In the same way, when P is in the downstream pipeline2When the opening of the throttling opening at the secondary valve clack is increased unexpectedly, the opening of the throttling opening at the secondary valve clack needs to be reduced so as to inhibit P in a downstream pipeline2When less gas in the decompression chamber enters the gas inlet passage, the gas pressure in the decompression chamber becomes high, and the gas pressure P in the decompression chamber becomes high1JThe resultant force balance state of the spring force and the gas pressure of the stop spring in the feedback chamber is broken, and the gas pressure P in the decompression chamber1JThe resultant force of the spring force and the gas pressure of a stop spring in the feedback cavity is greater, the stop leather diaphragm moves towards the feedback cavity, and the stop leather diaphragmThe membrane drives the one-level valve rod to move, the end part of the one-level valve rod is close to the one-level valve clack, and the opening degree of the throttling port at the one-level valve clack is reduced, so that gas entering the gas channel is reduced, and less gas can automatically enter the gas inlet channel of the second-level valve rod. At this time, due to P in the downstream pipeline2The increase, consequently the gas pressure in the feedback chamber also increases, and the atmospheric pressure in the feedback chamber that ends the involucra both sides like this and the decompression chamber all increases, has avoided only the pressure in the decompression chamber to increase in the twinkling of an eye and has made to stop the involucra both sides atress difference take place great change in the twinkling of an eye and cause the one-level valve rod to move comparatively acutely and damage.
Preferably, as an improvement, the secondary valve flap is provided with a pressure relief hole. The arrangement of the pressure relief hole can discharge redundant gas.
Drawings
FIG. 1 is a front cross-sectional view of a command valve.
Fig. 2 is a schematic view of the pilot valve and the main valve body when they are used in cooperation in a gas pipeline.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the pressure regulating valve comprises a plug 1, a first-stage valve clack 2, a first-stage valve rod 3, a stop spring 5, a stop membrane pressing plate 6, a stop membrane 7, a low-pressure stop spring 10, a second-stage valve clack 11, a feedback membrane pressing plate 12, a feedback membrane 13, a pressure regulating seat 14, a second-stage valve rod 15, a pressure regulating membrane 17, a pressure regulating membrane pressing plate 18, an upper spring seat 19, a pressure regulating spring 20, a pressure regulating valve sleeve 22, a regulating screw 23, a second pipeline 24, a remote loading air pipe 25, a first pipeline 26, a third pipeline 27, a feedback cavity 28, a pressure reducing cavity 29, a first cavity 30, a second cavity 31, a fourth pipeline 32, a commanding valve body 33, a guide cylinder 34, an intermediate connecting part 35, a left end part 36, a pressure regulating cavity cover 41, a membrane pressing plate 42, a main valve membrane 43, a pressure regulating piston pull rod 44, a pressure regulating cavity bottom 45, an upper valve cover 46, a pressure regulating main spring 47, a pressure regulating piston 48, a main valve clack 49, a pressure regulating piston pressing plate 50, a pressure regulating valve seat 51, a low-pressure regulating piston pressing plate 11, a low-pressure regulating piston, a low-pressure regulating valve seat 11, a low-pressure regulating valve seat, a low-pressure-type valve seat, a high-pressure valve seat, a pressure-type pressure-pressure, A main valve body 52, a valve cap 53, an upstream conduit 54, a sixth conduit 55, a fifth conduit 56, a downstream conduit 57.
The embodiment is basically as shown in the attached figure 1: the utility model provides a commander valve for pressure regulator, is equipped with horizontal second grade valve rod 15 through bolt fastening including commander valve body 33 on the commander valve body 33, is equipped with on second grade valve rod 15 and is horizontal inlet channel and outlet channel, and inlet channel is located outlet channel's left side, and the left end of second grade valve rod 15 is inlet channel's inlet end, and the right-hand member of second grade valve rod 15 is outlet channel's the end of giving vent to anger. The right-hand member of inlet channel is equipped with the gas outlet that upwards sets up, and the left end of outlet channel is equipped with the air inlet that upwards sets up. The commanding valve body 33 is provided with a first chamber 30 positioned on the upper side of the secondary valve rod 15 and a second chamber 31 positioned on the lower side of the secondary valve rod 15, the pressure regulating seat 14 is sleeved on the outer side of the secondary valve rod 15, and a gap is formed between the inner wall of the pressure regulating seat 14 and the secondary valve rod 15.
A low-pressure stop spring 10, a secondary valve clack 11, a feedback membrane pressing plate 12 and a feedback membrane 13 are arranged in the first chamber 30, the middle of the feedback membrane 13 is fixed on the secondary valve clack 11 through the feedback membrane pressing plate 12, the feedback membrane pressing plate 12 is fixed on the secondary valve clack 11 through a screw, and the middle of the feedback membrane 13 is located between the feedback membrane pressing plate 12 and the top of the adjusting seat. The outer edge of the feedback diaphragm 13 is fixed on the inner wall of the first chamber 30 through a screw, one end of the low-pressure stop spring 10 is clamped on the top end part of the first chamber 30, and the bottom end of the low-pressure stop spring 10 is clamped on the feedback diaphragm pressing plate 12. The second-stage valve clack 11 is located above the air outlet of the air inlet channel, the second-stage valve clack 11 is opposite to the air outlet of the air inlet channel and can be abutted against the air outlet of the air inlet channel, and the second-stage valve clack 11 is fixed on the top end of the pressure regulating seat 14 through a screw. And a pressure relief hole is formed in the secondary valve clack 11.
Be equipped with pressure regulating involucra 17, pressure regulating involucra clamp plate 18 and pressure regulating spring 20 in the second cavity 31, the middle part of pressure regulating involucra 17 is located between pressure regulating involucra clamp plate 18 and the bottom of pressure regulating seat 14, and pressure regulating involucra 17 middle part is fixed on the bottom of pressure regulating seat 14 through pressure regulating involucra clamp plate 18, and the outer edge of pressure regulating involucra 17 passes through the fix with screw on the inner wall of second cavity 31. An upper spring seat 19 is arranged below the pressure regulating membrane pressing plate 18, and the upper spring seat 19 is abutted against the bottom end of the pressure regulating seat 14. A lower spring seat is arranged below the upper spring seat 19, and the pressure regulating spring 20 is connected between the upper spring seat 19 and the lower spring seat. Both the upper spring seat 19 and the lower spring seat are vertically slidable inside the second chamber 31. The commanding valve body 33 is provided with a first air inlet communicated with the second chamber 31, the first air inlet is connected with a remote loading air pipe 25 through a nut, and one end, far away from the commanding valve, of the remote loading air pipe 25 is connected with a terminal control part. The bottom of the command valve body 33 is a guide cylinder 34 fixedly connected through a screw, the outer side of the guide cylinder 34 is connected with a pressure regulating valve sleeve 22 through threads, the center of the pressure regulating valve sleeve 22 is provided with threads, the pressure regulating valve sleeve 22 is connected with an adjusting screw rod 23 through threads, and a lower spring seat is abutted against the upper end of the adjusting screw rod 23. The bottom end of the adjusting screw 23 is located outside the command valve body 33.
The command valve body 33 is provided with a second inlet communicating with the first chamber 30. The second air inlet is connected with a first pipeline 26 through a nut, and the first pipeline 26 is communicated with a downstream pipeline 57 of the fuel gas pipeline.
The intermediate connecting part 35 and the left end part 36 are fixedly connected to the left side of the command valve body 33 through screws or bolts in sequence. The inside middle connecting portion 35 and the inside horizontal slip of left end portion 36 of commander valve body 33 have one-level valve rod 3, are equipped with horizontal gas channel on the one-level valve rod 3, and gas channel's left end is the inlet end, and gas channel's right-hand member is the end of giving vent to anger. Be equipped with the third chamber between intermediate junction portion 35 and the left end portion 36, fixed being equipped with on the one-level valve rod 3 and being located the third chamber by involucra 7, specific fixed mode is: the primary valve rod 3 and the stop membrane 7 are fixed by a stop membrane pressing plate 6 and a nut at the right end of the primary valve rod 3. The edge part of the stop membrane 7 is fixedly connected to the inner wall of the third chamber through a screw. The stop diaphragm 7 divides the third chamber into a feedback chamber 28 and a decompression chamber 29, the feedback chamber 28 is positioned on the left side of the decompression chamber 29, a stop spring 5 is arranged in the feedback chamber 28, the stop spring 5 is sleeved on the first-stage valve rod 3, the stop spring 5 is connected between the inner wall of the left side of the feedback chamber 28 and the stop diaphragm pressing plate 6, the right end of the first-stage valve rod 3 is positioned in the decompression chamber 29, and the air inlet end of an air inlet channel on the second-stage valve rod 15 is positioned in the decompression chamber 29; the command valve body 33 is provided with an air inlet cavity and a plug 1 for plugging the air inlet cavity, and the plug 1 is fixed on the left end part 36 through a screw. The right side face of the plug 1 is fixedly provided with a first-level valve clack 2 through a screw, the left end of the first-level valve rod 3 can be abutted against the first-level valve clack 2, and a third air inlet communicated with the air inlet cavity is formed in the left end portion 36. The third air inlet is connected with a second pipeline 24 through a nut, and the second pipeline 24 is communicated with an upstream pipeline 54 of the fuel gas pipeline.
A fourth inlet port communicating with the feedback chamber 28 is provided between the left end portion 36 and the intermediate connecting portion 35. The fourth air inlet is connected with a third pipeline 27 through a nut, and the third pipeline 27 is communicated with a downstream pipeline 57 of the fuel gas pipeline.
The command valve in this embodiment is applied to a pressure regulator, and in order to facilitate understanding of the function of the command valve in the pressure regulator, the structure of the main valve body part not belonging to the command valve is described in this embodiment: referring to fig. 2, the main valve body part is composed of a pressure regulating cavity cover 41, a membrane pressing plate 42, a main valve membrane 43, a pressure regulating piston pull rod 44, a pressure regulating cavity bottom 45, an upper valve cover 46, a pressure regulating main spring 47, a pressure regulating piston 48, a main valve body valve flap 49, a pressure regulating piston pressing plate 50, a pressure regulating valve seat 51, a main valve body 52 and a valve cover 53 from top to bottom, the middle part of the main valve membrane 43 is clamped between the two membrane pressing plates 42, the upper part of the pressure regulating piston pull rod 44 penetrates through the upper membrane pressing plate 42, the main valve membrane 43 and the lower membrane pressing plate 42 from bottom to top in sequence, and the upper end of the pressure regulating piston pull rod 44 is provided with a nut for locking. The outer edge of the main valve leather diaphragm 43 is fixed between the pressure regulating cavity cover 41 and the pressure regulating cavity bottom 45 through bolts and nuts, the pressure regulating cavity bottom 45 is fixed on the upper end surface of the upper valve cover 46 through bolts, the lower end surface of the upper valve cover 46 is fixed on a middle opening flange at the upper end of the main valve body 52 through bolts, the lower part of the pressure regulating piston pull rod 44 sequentially penetrates through the pressure regulating cavity bottom 45, the upper valve cover 46 and the pressure regulating main spring 47, the pressure regulating piston 48, the main valve body valve clack 49 and the pressure regulating piston pressure plate 50 are arranged in the center hole, the lower end part of the pressure regulating piston pull rod 44 is fixed on the lower surface of the pressure regulating piston pressure plate 50 through a nut, the upper end surface of the pressure regulating main spring 47 is in contact with a concave table at the bottom of the upper valve cover 46, the lower end surface of the pressure regulating piston pull rod is in contact with a concave table at the bottom in the pressure regulating piston 48, the outer surface of the pressure regulating piston 48 is in contact with the inner surface of the lower part of the upper valve cover 46, and the main valve body valve clack 49 is arranged between the pressure regulating piston 48 and the pressure regulating piston pressure plate 50 and is fixed through the pressure regulating piston pressure plate 50 and the nut. The pressure regulating valve seat 51 is arranged below the pressure regulating piston pressure plate 50 and is fixed on the upper part of a boss in the middle of the main valve body 52 through threads, and the valve cover 53 is fixed on a middle flange in the lower part of the main valve body 52 through bolts. The main valve body 52 has an upstream pipe 54 and a downstream pipe 57 connected to the left and right ends thereof, respectively. A fourth pipeline 32 is connected between the air outlet at the right end of the command valve body 33 and the pressure regulating cavity bottom 45 on the main valve body 52. The downstream pipeline 57 of the gas pipeline is connected with a fifth pipeline 56, and the first pipeline 26 and the third pipeline 27 are connected with the fifth pipeline 56. A sixth conduit 55 is connected between the pressure regulating chamber cover 41 and the fifth conduit 56.
The specific implementation process is as follows:
1) initial state:
when the remote control self-operated pressure regulator is started, the pressure regulating spring 20 on the command valve is in an uncompressed state, and the remote loading air pressure P of the terminal control partTWhen unloaded, the low pressure stop spring 10 in the first chamber 30 pushes the pressure regulating seat 14 downwards, and the orifice at the secondary valve flap 11 of the pilot valve is closed, and no load pressure P is provided on the fourth pipe 32LSince the main valve body 52 is provided in a chamber below the main valve diaphragm 43, the pressure regulating and throttling member (the main valve body flap 49, the pressure regulating piston holding plate 50, and the pressure regulating piston 48) of the main valve body 52 is completely sealed with the pressure regulating valve seat 51, and the gas medium in the gas pipe cannot flow from left to right to the outlet end of the main valve body 52.
2) Basic adjustment:
an adjusting screw rod 23 on the commanding valve is screwed upwards, the adjusting screw rod 23 drives a pressure adjusting spring 20 to move upwards through a lower spring seat, the pressure adjusting spring 20 drives an upper spring seat 19 to move upwards, the pressure adjusting spring 20 pushes a pressure adjusting seat 14 upwards and drives a secondary valve clack 11 to move upwards, a throttling opening at the secondary valve clack 11 is opened, a gas medium in an upstream pipeline 54 of the fuel pipeline enters an air inlet cavity on a left end part 36 through a second pipeline 24 and flows from left to right through a gas channel of a primary valve rod 3 to enter a decompression cavity 29, the gas enters an air inlet channel of the secondary valve rod 15 and flows out from the secondary valve rod 15 to a position between a feedback diaphragm 13 and a pressure adjusting diaphragm 17, the gas flows from an air outlet channel of the secondary valve rod 15 to right and flows out from a fourth pipeline 32 to provide load pressure P in a cavity below a diaphragm 43 of a main valve body partLPressure of loadForce PLThe chamber below the main valve membrane 43, the main part of which enters the main valve body part, generates upward thrust, the load pressure PLThe minor portion flows from the pilot tube to the outlet port on the right side of main valve body 52 through the secondary valve flap 11 pressure relief orifice of the pilot valve. When the upward thrust received by the main valve membrane 43 overcomes the downward elastic force of the pressure-regulating main spring 47, the valve port of the main valve body 52 is opened, and the gas medium flows from the inlet end to the outlet end of the main valve body 52 and flows into the load pressure P with the pressure-guiding pipeLThe secondary part synthesis generates outlet pressure P2, the outlet pressure P2 in turn acts on the left surface of a stop diaphragm 7 on the command valve, the upper surface of a feedback diaphragm 13 on the command valve and the upper surface of a main valve body part main valve diaphragm 43 through a fifth pipeline 56, a first pipeline 26, a third pipeline 27 and a sixth pipeline 55 respectively, and the opening degrees of a throttling port at the first-stage valve clack 2, a throttling port at the second-stage valve clack 11 and a throttling port in a main valve body 52 of the command valve are cooperatively and dynamically adjusted, so that the outlet pressure P2 is enabled to be generated2Stable within the manufacturing precision range. Screw in and screw out the command valve adjusting screw 23 to make P2The value reaches the required minimum pressure value.
3) Remote pressure loading:
the required outlet pressure value is remotely set through the control center, the remote control terminal loads pressure PT through the remote loading pipe, the loading pressure PT acts on the lower part of the pressure regulating diaphragm 17 of the command valve, and the loading pressure PTThe resultant force of the upward urging force of the pressure-regulating spring 20 is balanced with P in the first chamber 302The combined force of the downward pressure and the downward spring force of the low pressure stop spring 10.
4) Operation:
when the outlet pressure P is2Lowering or remotely controlling the outlet pressure P2When rising:
A. when the outlet pressure P2 is unexpectedly reduced, the combined force of the downward gas pressure in the first chamber 30 and the downward force of the low pressure stop spring 10 is less than the upward force of the regulator spring 20 in the second chamber 31 and the remotely loaded pressure PTThe pressure regulating spring 20 pushes the pressure regulating seat 14 upwards and drives the pilot valve secondary valve flap 11 to move upwards, so that the resultant force of the downward gas pressure in the first chamber 30 and the downward force of the low pressure stop spring 10 is balanced with the combined force of the downward force of the second chamber and the low pressure stop spring 10The resultant force of the upward force of the pressure regulating spring 20 in the two-chamber 31 and the remotely loaded pressure PT commands the orifice at the secondary valve flap 11 of the valve to increase and stabilize at a new equilibrium position, the load pressure PL generated by the command valve increases, the upward force of the main valve membrane 43 in the main valve body part is balanced with the downward force of the pressure regulating main spring 47 in the pressure regulating throttling part, the executing part of the main valve body 52 overcomes the downward spring force of the pressure regulating main spring 47 and pushes the pressure regulating throttling part (the pressure regulating piston 48, the main valve flap 49 and the pressure regulating piston pressure plate 50) to move upward until reaching the new equilibrium, the orifice on the main valve body 52 increases, and therefore the flow of the gas medium flowing through the main valve body 52 increases to prevent the outlet pressure P from increasing2A reduced tendency.
B. Requiring remote control of the outlet pressure P2When the value rises to a new value, the loading pressure P is increasedTWhen the combined force of the downward gas pressure in the first chamber 30 and the downward force of the low-pressure stop spring 10 is higher than the combined force of the upward force of the pressure regulating spring 20 in the second chamber 31 and the remotely loaded pressure PT, the pressure regulating spring 20 pushes the pressure regulating seat 14 upwards and drives the second-stage valve flap 11 of the command valve to move upwards to reach a new balance, the throttling opening of the second-stage valve flap 11 on the command valve is enlarged and stabilized at a new balance position, and the load pressure P generated by the command valveLThe upward force of the main valve membrane 43 on the main valve body 52 is balanced with the downward force of the pressure regulating main spring 47 in the pressure regulating throttling part, the executing part overcomes the downward spring force of the pressure regulating main spring 47 and pushes the pressure regulating throttling part to move upwards until reaching the new balance, the throttling opening of the main valve body 52 is enlarged, and therefore the flow of the gas medium flowing through the main valve body 52 is increased until the outlet pressure P is increased2The value reaches the new value of the remote control setting and rebalances.
In the present embodiment, when the load pressure PL increases, a large amount of gas in the decompression chamber 29 enters the intake passage, the gas pressure in the decompression chamber 29 decreases, and the gas pressure P in the decompression chamber 291JThe state of balance with the spring force of the stop spring 5 in the feedback chamber 28 is broken, and the gas pressure P in the decompression chamber 29 is released1JThe spring force of a stop spring 5 in the feedback cavity 28 is smaller, the stop film 7 moves towards the decompression cavity 29, and the stop film 7 drives the first-stage valve rod 3 to moveThe end of the stage valve rod 3 is far away from the first-stage valve clack 2, the opening degree of the throttling opening at the first-stage valve clack 2 is increased, so that the gas entering the gas channel is increased, more gas can automatically enter the gas inlet channel of the second-stage valve rod 15, and the load pressure P is guaranteedLAnd is increased.
When the outlet pressure P is2Raising or remotely controlling the outlet pressure P2When the reduction is carried out:
A. outlet pressure P2In case of accidental rise, the combined force of the downward gas pressure in the first chamber 30 and the downward force of the low pressure stop spring 10 is greater than the upward force of the pressure regulating spring 20 in the second chamber 31 and the remotely loaded pressure PTThe pressure regulating seat 14 drives the second-stage valve clack 11 of the command valve to move downwards to reach a new balance, and the throttling opening at the second-stage valve clack 11 of the command valve is reduced and stabilized at a new balance position, so that the load pressure P generated by the command valveLThe load pressure P below the main valve diaphragm 43 entering the main valve body part is reducedLAnd decreases. Thus, the balance between the upward force of the main valve membrane 43 on the main valve body part and the downward force of the pressure regulating main spring 47 in the pressure regulating throttling part is broken, the execution part of the main valve body 52 drives the pressure regulating throttling part (the pressure regulating piston 48, the main valve body valve clack 49 and the pressure regulating piston pressure plate 50) to move downwards under the downward spring force of the pressure regulating main spring 47 until the new balance is reached, the throttling port on the main valve body 52 is reduced, and the flow of the gas medium flowing through the main valve body 52 is reduced to prevent the outlet pressure P2The tendency to increase.
B. Requiring remote control of the outlet pressure P2When the value is reduced to a new value, the loading pressure P is controlled remotelyTAs a result, the combined force of the downward gas pressure in the first chamber 30 and the downward force of the low pressure stop spring 10 is greater than the upward force of the pressure regulating spring 20 in the second chamber 31 and the remotely applied pressure PTThe pressure regulating seat 14 drives the second-stage valve clack 11 of the command valve to move downwards under the action of the downward thrust to reach new balance, the throttling opening of the second-stage valve clack 11 on the command valve is reduced and stabilized at the new balance position, and the load pressure P generated by the command valveLThe upward force of the main valve membrane 43 of the main valve body 52 and the pressure regulating main in the pressure regulating throttling part are reducedThe downward force balance of the spring 47 is broken, and the actuator part pushes the pressure regulating throttle part to move downward under the downward force of the pressure regulating main spring 47 until a new balance is reached, the throttle of the main valve body 52 is reduced, and the flow rate of the gas medium flowing through the main valve body 52 is reduced until the outlet pressure P is reached2The value reaches the new value of the remote control setting and rebalances.
In this embodiment, when the opening of the orifice at the secondary valve flap 11 is smaller, the command valve needs to provide a smaller load pressure PLWhen a small amount of gas in the decompression chamber 29 enters the intake passage, the gas pressure in the decompression chamber 29 increases due to accumulation of the gas, and the gas pressure P in the decompression chamber 291JThe state of balance with the spring force of the stop spring 5 in the feedback chamber 28 is broken, and the gas pressure P in the decompression chamber 29 is released1JGreater than the spring force of ending spring 5 in the feedback chamber 28, end the direction of involucra 7 to feedback chamber 28 and remove, end involucra 7 and drive one-level valve rod 3 and move left, the tip of one-level valve rod 3 is close to one-level valve clack 2, the throttle opening aperture of one-level valve clack 2 department diminishes, thereby make the gas that enters into in the gas passage diminish, can make less gas enter into the inlet channel of second grade valve rod 15 automatically, thereby guarantee load pressure PLAnd decreases.
The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The utility model provides a commander valve for pressure regulator, includes the commander valve body, be equipped with second grade valve rod, its characterized in that on the commander valve body: the commanding valve body is provided with a first cavity positioned on one side of the secondary valve rod and a second cavity positioned on the other side of the secondary valve rod, and the outer side of the secondary valve rod is sleeved with a pressure regulating seat; a low-pressure stop spring, a secondary valve clack, a feedback diaphragm pressing plate and a feedback diaphragm are arranged in the first cavity, the middle part of the feedback diaphragm is fixed on the secondary valve clack through the feedback diaphragm pressing plate, the outer edge of the feedback diaphragm is fixed on the inner wall of the first cavity, one end of the low-pressure stop spring is fixed on the end part, far away from the secondary valve rod, of the first cavity, the other end of the low-pressure stop spring is fixed on the feedback diaphragm pressing plate, the secondary valve clack can abut against the air outlet end of the air inlet channel, and the secondary valve clack is fixed on the part, located in the first cavity, of the pressure regulating seat; the pressure regulating leather diaphragm, the pressure regulating leather diaphragm pressing plate and the pressure regulating spring are arranged in the second cavity, the middle part of the pressure regulating leather diaphragm is fixed on the position, located in the second cavity, of the pressure regulating seat through the pressure regulating leather diaphragm pressing plate, the outer edge of the pressure regulating leather diaphragm is fixed on the inner wall of the second cavity, and the pressure regulating spring is connected between the pressure regulating leather diaphragm pressing plate and the end part, far away from the secondary valve rod, of the second cavity; and a first air inlet communicated with the second chamber is formed in the commanding valve body.
2. The command valve for the pressure regulator as claimed in claim 1, wherein: threaded connection has adjusting screw on the commander valve body, adjusting screw's one end is arranged in the second cavity, and adjusting screw's the other end is arranged in the outside of commander valve body, the inside sliding connection of second cavity has the spring holder, the one end that secondary valve rod was kept away from to the pressure regulating spring is fixed to be located the spring holder, one end and the spring holder that adjusting screw is arranged in the second cavity offset.
3. The command valve for the pressure regulator as claimed in claim 1, wherein: and a second air inlet communicated with the first chamber is arranged on the commanding valve body.
4. The command valve for the pressure regulator as claimed in claim 1, wherein: the commanding valve body is connected with a first-stage valve rod in a sliding mode, a gas channel is arranged on the first-stage valve rod, a third chamber is arranged on the commanding valve body, a stop leather membrane located in the third chamber is fixedly arranged on the first-stage valve rod, and the edge part of the stop leather membrane is fixedly connected to the inner wall of the third chamber; the third chamber is divided into a feedback chamber and a decompression chamber by the stop diaphragm, a stop spring is arranged in the feedback chamber and connected between the inner wall of the feedback chamber and the stop diaphragm, one end of the primary valve rod is positioned in the decompression chamber, the air outlet end of the gas channel is positioned in the decompression chamber, and the air inlet end of the air inlet channel is positioned in the decompression chamber; the commanding valve body is provided with an air inlet cavity and a plug for plugging the air inlet cavity, the plug is provided with a first-stage valve clack, one end of the first-stage valve rod, which is far away from the decompression cavity, can be abutted against the first-stage valve clack, one end of the first-stage valve rod, which is far away from the decompression cavity, is an air inlet end of the gas channel, and the commanding valve body is provided with a third air inlet communicated with the air inlet cavity.
5. The command valve for pressure regulator as claimed in claim 4, wherein: and a fourth air inlet communicated with the feedback cavity is formed in the commanding valve body.
6. The command valve for the pressure regulator as claimed in claim 1, wherein: and a pressure relief hole is formed in the second-stage valve clack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449970.1U CN215110757U (en) | 2021-06-28 | 2021-06-28 | Command valve for pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449970.1U CN215110757U (en) | 2021-06-28 | 2021-06-28 | Command valve for pressure regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215110757U true CN215110757U (en) | 2021-12-10 |
Family
ID=79311870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121449970.1U Active CN215110757U (en) | 2021-06-28 | 2021-06-28 | Command valve for pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215110757U (en) |
-
2021
- 2021-06-28 CN CN202121449970.1U patent/CN215110757U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215110768U (en) | Remote control self-operated pressure regulator | |
| EP2191178B1 (en) | Modular in-line fluid regulators | |
| CN106763960B (en) | Piston type axial flow pressure regulator | |
| CN102678994A (en) | Novel automatic decompression voltage and current stabilizer | |
| CN202048252U (en) | Self-operated pressure regulating valve operated by pilot valve | |
| CN215110757U (en) | Command valve for pressure regulator | |
| CN1256523C (en) | Super high pressure air-actuated proportional pressure-reducing valve | |
| CN209444637U (en) | A kind of identical tension hydraulic control system and electric power stretching machine | |
| CN108980208B (en) | Ultrahigh-precision pressure control device | |
| CN210461829U (en) | Pressure stabilizing director for gas pressure regulator | |
| CN103307323B (en) | High-pressure reducing valve | |
| CN105673903A (en) | Self-operated balance valve | |
| KR20130105979A (en) | Regulator | |
| CN110469703A (en) | A kind of high sensitivity pilot operated compound relief valve | |
| CN210461825U (en) | Gas safety relief valve | |
| US5017099A (en) | Fluid regulator valve | |
| CN114688324A (en) | Hydrogen supply combination valve with flow regulation and pressure stabilization functions | |
| CN209892815U (en) | Trace discharge device of air pressure load type gas pressure regulator | |
| CN214119059U (en) | Normally open type self-operated pressure regulator | |
| CN214699370U (en) | Pressure reducing valve for micro-pressure self-operated regulating valve | |
| CN221171814U (en) | Fault opening director | |
| CN201802933U (en) | Integrated high pressure reducing valve group | |
| CN106838390A (en) | New type pressure regulating valve pilot valve | |
| CN110985733A (en) | Self-operated pressure balance valve | |
| CN2784698Y (en) | Pressure regulating valve with dual closing mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |