CN115789523B - Gas transmission and distribution pipe network with remote cut-off function - Google Patents
Gas transmission and distribution pipe network with remote cut-off function Download PDFInfo
- Publication number
- CN115789523B CN115789523B CN202310074333.8A CN202310074333A CN115789523B CN 115789523 B CN115789523 B CN 115789523B CN 202310074333 A CN202310074333 A CN 202310074333A CN 115789523 B CN115789523 B CN 115789523B
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- pressure
- cavity
- diaphragm
- 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
Abstract
The invention discloses a gas transmission and distribution pipe network with remote cut-off, and relates to the technical field of valves and automatic control thereof. The invention comprises a fuel gas transmission and distribution pipe network, wherein the fuel gas transmission and distribution pipe network at least comprises a pressure regulating and cutting branch, the pressure regulating and cutting branch comprises a cutting valve and a pressure regulator which are sequentially and serially arranged on the branch, and the cutting valve is connected with a cutting execution part; the pressure regulator is connected with the director, and the pilot valve is added in the existing fuel gas transmission and distribution pipe network, the pilot valve is novel in structural design, and the control of the pilot valve can realize the cut-off after the overpressure of the system and the remote emergency cut-off in a control center; by using the pilot valve, when the pressure regulating device works in two or more paths, the cut-off threshold value can be set according to the requirement, is not set according to the difference of outlet pressure, and is not cut off due to the fluctuation of the outlet pressure of a certain path; meanwhile, the cut-off valve actuator and the adjusting spring can meet the requirements of different use conditions by only one configuration.
Description
Technical Field
The invention relates to the technical field of valves and automatic control thereof, in particular to the technical field of cutting-off control equipment of a gas transmission and distribution pipe network, and more particularly relates to a gas transmission and distribution pipe network with remote cutting-off function.
Background
The safety protection of the existing fuel gas distribution pipe network is generally realized by adopting a pressure regulator and a shut-off valve, the shut-off valve and the pressure regulator are generally connected in series, the shut-off valve is arranged on the upper stream of the pipe network, the pressure regulator is positioned on the downstream of the pipe network, the shut-off valve is matched with the shut-off valve and also comprises a command device, when the pressure after pressure regulation is over-pressure due to reasons, the command device can control the pressure regulator to reduce the opening according to the pressure before pressure regulation and the pressure after pressure regulation, thereby controlling the downstream pressure of the distribution pipe network, and if the pressure after that is continuously ultrahigh to the set threshold value of the shut-off valve, the shut-off device can drive the shut-off valve to rapidly shut off the gas source, so that downstream equipment and gas utilization safety are protected. The controller is used for controlling and regulating the opening of the pressure regulator according to the pressure difference by connecting the pipeline pressure before pressure regulation and the pipeline pressure after pressure regulation, the cutting-off execution part is used for realizing cutting-off control of the cut-off valve according to the pressure after pressure regulation, the regulating springs are arranged in the cutting-off execution part, the elastic value of the regulating springs is set at present, the overpressure value of the pipeline pressure after pressure regulation is set, and when the elastic force of the regulating springs is overcome by the pipeline pressure value after pressure regulation, the cutting-off execution part controls the cut-off valve to cut off an incoming gas source, so that downstream equipment and gas utilization safety are protected.
The pressure regulating transmission and distribution branch in the existing fuel gas transmission and distribution pipe network is usually set to be two-way or multi-way, when the two-way or multi-way operation is adopted, the operation pressure of each branch is not consistent, the setting pressure of each branch is gradually reduced, but the cutting pressure can be gradually increased, especially when the multi-way operation is adopted, the pressure setting difference of each branch is larger, in addition, in operation, if the pressure of a certain branch fluctuates, the cutting valves of each branch are easily caused to be cut off simultaneously, and the installation mode is shown in the attached drawings 1 and 2.
In the gas transmission and distribution, because of various gas using equipment, various using working conditions are caused, and the configuration of the multi-type actuator is appointed for meeting the requirements of various working conditions, including matched adjusting springs.
Under the rapid development of emerging technologies such as big data, cloud computing, internet of things, mobile internet, artificial intelligence and the like, the construction of intelligent equipment of each gas company has stepped into a fast traffic lane, and higher requirements are put forward on the safety and the intelligent degree of the equipment, such as: the intellectualization of the pressure regulator, the remote cutting off of the cut-off valve, etc.
The existing fuel gas transmission and distribution pipe network completely depends on the pipeline pressure to realize the regulation and cutting off of the pipeline pressure, remote cutting off control cannot be realized, and when the cutting off valve is used for a long time, dust accumulation and clamping stagnation can occur in the cutting off valve, and when the pressure of the transmission and distribution pipe reaches a preset cutting off value, the action of the cutting off execution part cannot be successfully triggered, and when the pressure is higher than the preset cutting off pressure value, the action of the cutting off execution part can be triggered, so that the precision of the cutting off valve is influenced, and the safety accident is caused.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a gas transmission and distribution pipe network with remote cutting-off function, and aims to solve the problems that the gas transmission and distribution pipe network in the prior art cannot realize remote control cutting-off, and a gas source cannot be cut off in time when the pipeline pressure reaches a set pressure value after pressure regulation when dust accumulation and clamping of a cutting-off valve are blocked. The gas transmission and distribution pipe network with the remote cut-off function can realize the cut-off after the overpressure of the system and the remote emergency cut-off in the control center; the pilot valve is added in the existing fuel gas transmission and distribution pipe network, the pilot valve is novel in structural design, and the control of the pilot valve can realize the cut-off after the overpressure of the system and the remote emergency cut-off in a control center; by using the pilot valve, when the pressure regulating device works in two or more paths, the cut-off threshold value can be set according to the requirement, is not set according to the difference of outlet pressure, and is not cut off due to the fluctuation of the outlet pressure of a certain path; meanwhile, the cut-off valve actuator and the adjusting spring can meet the requirements of different use conditions by only one configuration. The most fundamental difference between the invention and the conventional cutting control mode is that: the conventional cutting control actuator is used for directly collecting the pressure after pressure regulation and matching the spring to control cutting; the cut-off valve actuator of the invention only needs to be provided with a fixed smaller spring, and the cut-off valve is controlled to be cut off by automatically controlling the on-off of the air flow entering the cut-off actuator through the pilot valve.
In order to solve the problems in the prior art, the invention is realized by the following technical scheme.
The invention discloses a gas transmission and distribution pipe network with remote cut-off, which at least comprises a pressure regulating and cutting-off branch, wherein the pressure regulating and cutting-off branch comprises a cut-off valve and a pressure regulator which are sequentially arranged on the branch in series, and the cut-off valve is connected with a cut-off executing component; the pressure regulator is connected with a director, the director is connected with the front pipeline pressure of the pressure regulator and the rear pipeline pressure of the pressure regulator, and the director pressure is generated according to the front pipeline pressure of the pressure regulator and the rear pipeline pressure of the pressure regulator, is connected with the pressure regulator and controls the opening of the pressure regulator; the pressure regulating and cutting branch circuit further comprises a pilot valve, the pilot valve comprises a left valve body and a right valve body, an air inlet cavity I, a valve seat I, a valve rod I, a diaphragm assembly I, a diaphragm cavity I and a compression spring I are arranged in the left valve body, the valve seat I is positioned in the air inlet cavity I, and an air inlet I is formed in the left valve body on one side of the air inlet cavity I; the diaphragm assembly I is positioned in the diaphragm cavity I and divides the diaphragm cavity I into an upper diaphragm cavity I and a lower diaphragm cavity I; the compression spring I is positioned in the upper membrane cavity I, and the lower end of the compression spring I acts on the membrane assembly I; the valve rod I is a hollow valve rod, the valve rod I is fixedly connected with the diaphragm assembly I, the upper end of the valve rod I extends upwards to be connected with the air outlet, and the lower end of the valve rod I extends into the air inlet cavity I to be in sealing fit with the valve seat I;
the right valve body is internally provided with an air chamber, a diaphragm cavity II, a diaphragm assembly II, a valve rod II and a valve seat II, the diaphragm assembly II is positioned in the diaphragm cavity II, the diaphragm cavity II is divided into an upper diaphragm cavity II and a lower diaphragm cavity II, the right valve body is provided with an air inlet II communicated with the upper diaphragm cavity II and an air inlet III communicated with the lower diaphragm cavity II, the upper end of the air chamber is fixedly provided with a valve port, the valve rod II is arranged in the valve port, the upper end of the valve rod II extends into the lower diaphragm cavity II to be in sealing fit with the diaphragm assembly II, the lower end of the valve rod II extends downwards to form a valve port to be fixedly connected with the valve seat II, the bottom of the valve port is in sealing fit with the upper end face of the valve seat II, and the bottom of the air chamber is provided with an air outlet penetrating through the right valve body; under the action of downward pressure on the valve rod II, the valve seat II moves downwards along with the valve rod II, the upper end surface of the valve seat II is unsealed from the bottom of the valve port, and the bottom of the valve seat II seals the exhaust port; the upper end of the valve port is also provided with a compression spring II, the lower end of the compression spring II acts on a limiting table in the valve port, and the upper end of the compression spring II acts on a limiting step of the valve rod II;
the upper end of the valve rod II is a semi-closed hollow cavity with an upward opening, a through hole communicated with a valve port is formed in the side wall of the hollow cavity, a communication hole communicated with an air chamber is formed in the side wall of the valve port, and a connecting cavity is formed between the air chamber of the right valve body and the lower membrane cavity I of the left valve body; a gas channel is arranged between the gas inlet II of the right valve body and the gas outlet of the left valve body, and an electromagnetic valve for controlling the on-off of the gas channel is arranged on the gas channel;
pipeline pressure behind the pressure regulator is connected to air inlet I, air inlet II links to each other with the director, connects director pressure, pipeline pressure behind the pressure regulator is connected to air inlet III, the shutoff executive component is connected to the gas outlet.
The working principle of the invention is as follows:
when the gas pipeline is in a normal working state, the director is connected with the pipeline pressure before the pressure regulator and the pipeline pressure after the pressure regulator to generate director pressure, then the director pressure is connected with the pressure regulator and the pilot valve, an air inlet II (from director pressure P0) on a right valve body of the pilot valve is compared with an air inlet III (from pressure-regulated pipeline pressure P2), P0 is larger than P2, the difference value of the two is a fixed value, the elasticity of a compression spring II is controlled to be equal to the fixed value, the resultant force of the P2 and the compression spring II is equal to P0, and a diaphragm assembly II is in a balanced state; the valve rod II is matched and sealed with the lower end of the diaphragm assembly II under the action of the compression spring II, gas in the gas inlet III (from the pressure-regulated pipeline pressure P2) cannot enter the hollow cavity of the valve rod II, and no gas exists in the connecting cavity. The valve rod I in the left valve body is matched and sealed with the valve seat I under the action of the compression spring I, and the air inlet I (from the pressure-regulated pipeline pressure P2) cannot enter the hollow air flow channel of the valve rod I and the air outlet of the left valve body; the electromagnetic valve arranged in the gas channel is in a normally closed state, gas at the gas inlet II of the right valve body cannot enter the gas outlet of the left valve body through the gas channel, the execution part of the cut-off valve is in a gas-free state, and the cut-off valve is not cut off.
When the pipeline pressure P2 rises to a certain value after the pressure of the gas pipeline is regulated, the gas pressure P2 in the lower membrane cavity II is greater than P0, the membrane assembly II moves towards the upper membrane cavity II, a gap appears between the membrane assembly II and the upper end of the valve rod II, the gas in the gas inlet III enters the semi-closed hollow cavity of the valve rod II, the gas acts on the hollow cavity of the valve rod II to generate downward force, the elasticity of the compression spring II is overcome, the valve rod II moves downwards, the valve seat II fixedly connected with the valve rod II also moves downwards along with the valve seat II, the gas outlet at the bottom of the gas chamber is closed, the gas in the semi-closed hollow cavity in the valve rod II enters the connecting cavity through the through hole in the side wall of the hollow cavity and the communication hole of the valve port, the connecting cavity enters the lower membrane cavity I of the left valve body, the balance of the membrane assembly I is destroyed, the upward acting force generated overcomes the elasticity of the compression spring I, the membrane assembly I moves towards the upper membrane cavity I, the valve rod I is driven to move upwards, the bottom of the valve rod I and the valve seat I are sealed open, the gas in the gas inlet I (from the pipeline pressure P2 after being regulated) enters the cut-off channel, the gas flow of the gas flow in the cut-off channel I is cut off through the valve seat I, and the gas flow is carried out by the valve body, and the front part.
When the gas source at the front end of the gas pipeline is cut off, the pressure P2 of the pipeline is reduced along with the pressure reduction, the pressure in the lower membrane cavity II of the right valve body is reduced, the membrane assembly II moves downwards, the pressure in the lower membrane cavity II acts on the valve rod II to generate downward force, the upward force generated by the action of the compression spring II is smaller than that generated by the action of the compression spring II, the valve rod II moves upwards under the action of the compression spring II, the lower end of the membrane assembly II is in contact with the upper end of the valve rod II to seal, the gas flow channel inside the gas inlet III to the gas guide valve is blocked, when the valve rod II moves upwards, the valve seat II fixedly connected with the valve rod II is driven to move upwards simultaneously, the gas outlet is opened, the gas originally entering the lower membrane cavity I of the left valve body flows back into the gas chamber through the connecting cavity to be discharged through the gas outlet at the bottom of the gas chamber, the gas pressure in the lower membrane cavity I of the left valve body is restored to be atmospheric pressure, the valve rod I moves downwards under the action of the compression spring I, the valve rod I and forms a matched seal with the valve seat I, the gas inlet I is blocked, the gas flow channel inside the gas inlet I is blocked, and the gas outlet does not flow. The pilot valve automatically returns to the original state.
When the pressure of the rear end is continuously increased to the set pressure of remote control, the electromagnetic valve in the gas channel is automatically opened, the gas with higher pressure from the gas inlet II (the gas P0 from director pressure) directly flows to the gas outlet through the gas channel at the electromagnetic valve, flows to the cut-off valve actuating component from the gas outlet, and the cut-off valve is actuated, so that the gas source at the front end of the gas pipeline is cut off. Or when the gas pipeline is required to be cut off remotely and manually in an emergency, the pilot valve electromagnetic valve button can be opened remotely in the control room, gas from the gas inlet II (gas P0 from director pressure) directly flows to the gas outlet through the gas channel at the electromagnetic valve, and flows to the cut-off valve executing part from the gas outlet, so that the action of the cut-off valve is ensured, and the safety accident is avoided.
In order to better implement the technical scheme of the invention, the invention also comprises the following technical contents:
further preferably, the pilot valve further comprises a valve body III, the valve body III is located above the left valve body and the right valve body, a through hole communicated with the air outlet on the left valve body is formed in the valve body III, and the air channel is located in the valve body III.
Still preferably, the left valve body comprises an upper valve body I and a lower valve body I, the valve seat I, the air inlet cavity I and the air inlet I are all positioned on the lower valve body I, the diaphragm cavity I is formed between the upper valve body I and the lower valve body I, the diaphragm assembly I is fixed between the upper valve body I and the lower valve body I, and openings for the valve rod I to move are formed in the upper valve body I and the lower valve body I; the upper end of the compression spring I acts on the upper valve body I, and the lower end acts on the upper end of the diaphragm assembly I.
Further preferably, the diaphragm assembly I comprises a diaphragm I, an upper pressure plate I and a lower pressure plate I, wherein the diaphragm I is positioned between the upper pressure plate I and the lower pressure plate I; the lower end of the compression spring I acts on the upper pressing disc I.
Still more preferably, the valve rod I is integrally fixed with the upper platen I.
Further preferably, the right valve body comprises an upper valve body II and a lower valve body II, the air chamber, the valve port, the valve rod II, the air inlet III, the connecting cavity and the valve seat II are all positioned in the lower valve body II, and the air inlet II is positioned on the upper valve body II; the diaphragm assembly II is located between the upper valve body II and the lower valve body II.
The upper valve body II is internally provided with a guide sleeve, the upper end of the diaphragm assembly II is connected with a valve rod III, the valve rod III extends upwards into the guide sleeve, and the guide sleeve is provided with a guide cavity matched with the valve rod III.
The diaphragm assembly II comprises a diaphragm II, an upper gland II and a lower gland II, and the diaphragm II is positioned between the upper gland II and the lower gland II.
The lower end of the valve rod III is fixed on the upper gland II, and the top end of the valve rod II is in sealing fit with the bottom of the lower gland II.
The valve port is assembled at the upper end of the air chamber, the upper end of the valve port extends into the lower membrane cavity II, and the bottom of the valve port is conical and is in sealing fit with the upper end face of the valve seat II.
Compared with the prior art, the beneficial technical effects brought by the invention are as follows:
1. according to the gas transmission and distribution pipe network with the remote cut-off function, the opening and the closing of the pilot valve of the gas transmission and distribution pipe network are realized through the gas pressure difference in the gas transmission pipeline, and the opening and the closing of the pilot valve can be controlled through the opening and the closing of the remote control electromagnetic valve. The pilot valve structure is highly integrated, the volume is small, and the two control modes are simple, convenient and reliable.
2. Compared with the prior art, the invention has the most direct technical effects that the structure of the original cutting execution part is simplified, the original execution part is different in structure according to different outlet pressures, for example, when the diaphragm is pressed and limited to adopt a piston structure in the high-pressure outlet, different outlet pressures are matched with different springs, the structure is complex, the configuration is complex, and the follow-up maintenance of the later-stage product is difficult. After the pilot valve is additionally arranged, the shut-off valve actuator is unified into a structure, and the pilot valve is matched with a fixed smaller spring, so that the pilot valve is convenient for production and later maintenance.
3. The conventional cut-off valve is generally free of remote cut-off control, if the remote cut-off valve is required, a signal sensing mechanism, an actuating cylinder and other mechanisms are required to be added on the cut-off valve, and the cut-off valve is complex in structure and difficult to operate. After the pilot valve is installed, as the pilot valve is additionally provided with the remote control electromagnetic valve, the remote direct control electromagnetic valve is opened and closed to realize the remote cutting-off of the cut-off valve, so that the remote cutting-off of the cut-off valve is quicker, simpler and more convenient, and the production cost is greatly reduced.
4. After the pilot valve is installed, the stability of the outlet pressure of the pressure regulating system is greatly improved. In particular, in a two-way or multi-way pipeline pressure regulating system, when two-way or multi-way operation is adopted, the operation pressure of each branch is set inconsistent, in order to prevent error cutting caused by the influence of air flow on the pressure change of the parallel branch due to the action of a cut-off valve, the setting pressure of each branch is gradually reduced, but the cutting pressure can be gradually increased, especially when the multi-way operation is adopted, the pressure setting difference of each branch is larger, and in operation, if the pressure of a certain branch fluctuates, the cut-off valve of each branch is extremely easy to cut off simultaneously. After the pilot valve is installed, the outlet pressure of each branch circuit can be set to be the same pressure value, and as the outlet pressure collected by cutting off the pilot valve by each branch circuit is the same pressure, the operation of other branch circuits can not be influenced even if the outlet pressure of one branch circuit fluctuates. Therefore, the pilot valve is installed, so that the pressure regulating system can operate more stably.
5. The valve body III is arranged, so that the processing of a gas channel and the assembly of the electromagnetic valve are facilitated, the gas channel is arranged in the valve body III, the electromagnetic valve inside the valve body is protected from being disturbed little by the outside, and the control precision is ensured.
6. The left valve body and the right valve body of the invention both comprise an upper valve body and a lower valve body, and the structural form is convenient for processing cavity structures such as an air chamber, a diaphragm cavity and the like on the valve body, and is also convenient for assembling structural members such as a valve seat, a valve rod, a compression spring and the like, and the processing and the assembling process are simple.
Drawings
FIG. 1 is a flow chart of a conventional one-way installation shutdown control;
FIG. 2 is a flow chart of a conventional multiple installation shut-off control;
FIG. 3 is a flow chart of the cut-off control of a single branch of a single-branch installation gas transmission and distribution pipe network of the invention;
FIG. 4 is a flow chart of the cut-off control of the double branches of the multi-path installation of the gas transmission and distribution pipe network of the invention;
FIG. 5 is a cross-sectional view of the pilot valve structure of the present invention;
reference numerals: 1. the shut-off valve, 2, pressure regulator, 3, commander, 4, shut-off actuator, 5, pilot valve, 6, left valve body, 7, right valve body, 8, intake port I, 9, valve seat I, 10, valve stem I, 11, diaphragm assembly I, 12, diaphragm cavity I, 13, compression spring I, 14, solenoid valve, 38, valve body, 39, upper diaphragm cavity I, 16, lower diaphragm cavity I, 17, gas outlet, 18, gas chamber, 19, diaphragm cavity II, 20, diaphragm assembly II, 21, valve stem II, 22, valve seat II, 23, upper diaphragm cavity II, 24, lower diaphragm cavity II, 25, gas inlet II, 26, gas inlet III, 27, valve port 28, gas outlet, 29, compression spring II, 30, limit table, 31, limit step, 32, hollow cavity, 33, through-hole, 34, communication hole, 35, connection cavity, 36, gas passage, 37, solenoid valve, 38, valve body, 39, upper valve body I, 40, lower valve body I, 41, diaphragm I, 42, upper I, 43, lower platen II, 44, upper platen II, 45, lower valve body, guide sleeve, 48, valve stem II, guide sleeve, gland, 50, gland, and gland, 50.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 of the specification, in a conventional gas distribution pipeline, a shut-off valve 1 and a pressure regulator 2 are generally provided to control the delivery pressure of the pipeline, wherein the pressure regulator 2 is used for regulating the pressure of the pipeline, and the shut-off valve 1 is located before the pressure regulator 2 to shut off the delivery of gas when the pressure of the pipeline is high after the pressure regulation. As shown in fig. 1 and 2 of the specification, the operating principle of the voltage regulator 2 is as follows: the director 3 is respectively connected with the pressure regulating front end pressure and the pressure regulating rear end pressure, and the opening of the pressure regulator 2 is controlled according to the pressure difference between the pressure regulating front end pressure and the pressure regulating rear end pressure in the director 3, so that the effect of regulating the conveying pressure is achieved; the shut-off valve 1 is connected to a shut-off actuator 4, the shut-off actuator 4 is driven by the pressure of the pressure-regulated rear end, and when the pressure of the pressure-regulated rear end is greater than a set pressure value, the shut-off actuator 4 is operated, and the shut-off valve 1 shuts off the delivery of the delivery line.
Referring to fig. 2 of the specification, the fuel gas pressure regulating pipeline is usually configured as a double-path or multiple-path, when the double-path or multiple-path operation is adopted, the operation pressure of each branch is not consistent, the setting pressure of each branch is gradually reduced, but the cutting pressure is gradually increased, especially when the multiple-path operation is adopted, the pressure setting difference of each branch is large, and in operation, if the pressure of a certain branch fluctuates, the cutting valves 1 of each branch are easily cut off simultaneously.
When dust accumulation and clamping stagnation occur in the shut-off valve 1, the pressure fluctuation of the transmission and distribution pipeline after pressure regulation can not trigger the action of the shut-off executing component 4, so that the situation of failure in shut-off can be caused, and safety accidents are caused.
In order to solve the problems, the invention provides a pilot valve 5 gas transmission and distribution pipe network with remote cut-off, which is characterized in that a pilot valve 5 is added in the existing gas transmission and distribution pipe network, the pilot valve 5 has novel structural design, and the cut-off after the overpressure of the system and the remote emergency cut-off in a control center can be realized by controlling the pilot valve 5; when the pilot valve 5 is used for two or more paths of operation of the pressure regulating equipment, the cut-off valve 1 can be set as required, is not set according to different outlet pressures, and is not cut off due to fluctuation of the outlet pressure of a certain path; meanwhile, the actuator and the adjusting spring of the cut-off valve 1 can meet the requirements of different use conditions by only one configuration. The most fundamental difference between the invention and the conventional cutting control mode is that: the conventional cutting control actuator is used for directly collecting the pressure after pressure regulation and matching the spring to control cutting; the actuator of the shut-off valve 1 of the present invention only needs to be provided with a fixed small spring, and the on-off of the air flow entering the shut-off actuator is automatically controlled by the pilot valve 5 to control the shut-off of the shut-off valve 1.
As an implementation mode of the invention, referring to fig. 3 in the specification, the embodiment discloses a pilot valve 5 gas transmission and distribution pipe network with remote cut-off, wherein the gas transmission and distribution pipe network at least comprises a pressure regulating cut-off branch, the pressure regulating cut-off branch comprises a cut-off valve 1 and a pressure regulator 2 which are sequentially and serially arranged on the branch, and a cut-off executing component 4 is connected on the cut-off valve 1; the pressure regulator 2 is connected with a director 3, the director 3 is connected with the front pipeline pressure of the pressure regulator 2 and the rear pipeline pressure of the pressure regulator 2, and the director pressure is generated according to the front pipeline pressure of the pressure regulator 2 and the rear pipeline pressure of the pressure regulator 2, is connected with the pressure regulator 2 and controls the opening of the pressure regulator 2.
As an example, referring to fig. 4 of the specification, a fuel gas delivery network is shown to include two pressure regulating shut-off branches.
In the embodiment, a new pilot valve 5 structure is added in the existing fuel gas distribution network, the pilot valve 5 is connected in series in the gas path of the cut-off execution part 4 and the pressure-regulated pipeline, and meanwhile, the pilot valve 5 is also connected with the command pressure of the commander 3.
Specifically, as shown in fig. 5 of the specification, the pilot valve 5 comprises a left valve body 6 and a right valve body 7, an air inlet cavity I8, a valve seat I9, a valve rod I10, a diaphragm assembly I11, a diaphragm cavity I12 and a compression spring I13 are arranged in the left valve body 6, wherein the valve seat I9 is positioned in the air inlet cavity I8, and an air inlet I14 is formed in the left valve body 6 at one side of the air inlet cavity I8; the diaphragm assembly I11 is positioned in the diaphragm cavity I12, and divides the diaphragm cavity I12 into an upper diaphragm cavity I15 and a lower diaphragm cavity I16; the compression spring I13 is positioned in the upper membrane cavity I15, and the lower end of the compression spring I13 acts on the membrane assembly I11; the valve rod I10 is a hollow valve rod, the valve rod I10 is fixedly connected with the diaphragm assembly I11, the upper end of the valve rod I10 extends upwards to be connected with the air outlet 17, and the lower end of the valve rod I10 extends into the air inlet cavity I8 to be in sealing fit with the valve seat I9;
the right valve body 7 is internally provided with an air chamber 18, a diaphragm cavity II 19, a diaphragm assembly II 20, a valve rod II 21 and a valve seat II 22, the diaphragm assembly II 20 is positioned in the diaphragm cavity II 19, the diaphragm cavity II 19 is divided into an upper diaphragm cavity II 23 and a lower diaphragm cavity II 24, the right valve body 7 is provided with an air inlet II 25 communicated with the upper diaphragm cavity II 23 and an air inlet III 26 communicated with the lower diaphragm cavity II 24, the upper end of the air chamber 18 is fixedly provided with a valve port 27, the valve rod II 21 is arranged in the valve port 27, the upper end of the valve rod II 21 extends into the lower diaphragm cavity II 24 to be in sealing fit with the diaphragm assembly II 20, the lower end of the valve rod II 21 downwards extends out of the valve port 27 to be fixedly connected with the valve seat II 22, the bottom of the valve port 27 is in sealing fit with the upper end face of the valve seat II 22, and the bottom of the air chamber 18 is provided with an air outlet 28 penetrating through the right valve body 7; under the downward pressure action of the valve rod II 21, the valve seat II 22 moves downwards along with the valve rod II 21, the upper end surface of the valve seat II 22 is unsealed from the bottom of the valve port 27, and the bottom of the valve seat II 22 seals the exhaust port 28; the upper end of the valve port 27 is also provided with a compression spring II 29, the lower end of the compression spring II 29 acts on a limit table 30 in the valve port 27, and the upper end of the compression spring II 29 acts on a limit step 31 of the valve rod II 21;
the upper end of the valve rod II 21 is a semi-closed hollow cavity 32 with an upward opening, a through hole 33 communicated with the valve port 27 is arranged on the side wall of the hollow cavity 32, a communication hole 34 communicated with the air chamber 18 is arranged on the side wall of the valve port 27, and a connecting cavity 35 is arranged between the air chamber 18 of the right valve body 7 and the lower membrane cavity I16 of the left valve body 6; a gas channel 36 is arranged between the gas inlet II 25 of the right valve body 7 and the gas outlet 17 of the left valve body 6, and a solenoid valve 37 for controlling the on-off of the gas channel 36 is arranged on the gas channel 36;
referring to fig. 3 and 4 of the specification, the air inlet I14 is connected with the pipeline pressure behind the pressure regulator 2, the air inlet II 25 is connected with the director 3 and is connected with the director pressure, the air inlet III 26 is connected with the pipeline pressure behind the pressure regulator 2, and the air outlet 17 is connected with the cut-off executing component 4. The specific working principle of this embodiment is as follows:
when the gas pipeline is in a normal working state, the director 3 is connected with the front pipeline pressure of the pressure regulator 2 and the rear pipeline pressure of the pressure regulator 2 to generate director pressure, then the director pressure is connected with the pressure regulator 2 and the pilot valve 5, compared with an air inlet III 26 (from the pipeline pressure P2 after pressure regulation), an air inlet II 25 (from the director pressure P0) on a right valve body 7 of the pilot valve 5 is larger than P2, the difference value of the air inlet II and the air inlet II is a fixed value, the elasticity of the compression spring II 29 is controlled to be equal to the fixed value, the combined force of the P2 and the compression spring II 29 is equal to P0, and the diaphragm assembly II 20 is in a balanced state; the valve rod II 21 is matched and sealed with the lower end of the diaphragm assembly II 20 under the action of the compression spring II 29, gas in the gas inlet III 26 (from the pressure-regulated pipeline pressure P2) cannot enter the hollow cavity 32 of the valve rod II 21, and no gas exists in the connecting cavity 35. The valve rod I10 in the left valve body 6 is matched and sealed with the valve seat I9 under the action of the compression spring I13, and the air inlet I14 (from the pressure-regulated pipeline pressure P2) cannot enter the hollow air flow channel of the valve rod I10 and the air outlet 17 of the left valve body 6; the electromagnetic valve 37 provided in the gas passage 36 is in a normally closed state, gas at the gas inlet II 25 of the right valve body 7 cannot enter the gas outlet 17 of the left valve body 6 through the gas passage 36, the execution member of the shut-off valve 1 is in a gas-free state, and the shut-off valve 1 is not shut off.
When the pipeline pressure P2 rises to a certain value after the pressure of the gas pipeline is regulated, the gas pressure P2 in the lower membrane cavity II 24 is increased by the gas inlet III 26 to be larger than P0, the membrane assembly II 20 moves towards the upper membrane cavity II 23, a gap is formed between the membrane assembly II 20 and the upper end of the valve rod II 21, gas in the gas inlet III 26 enters the semi-closed hollow cavity 32 of the valve rod II 21, downward force is generated in the hollow cavity 32 of the valve rod II 21 by the gas, the elasticity of the compression spring II 29 is overcome, the valve rod II 21 moves downwards, the valve seat II 22 fixedly connected with the valve rod II 21 also moves downwards along with the gas inlet II, the gas outlet 28 at the bottom of the gas chamber 18 is closed, the gas in the semi-closed hollow cavity 32 in the valve rod II 21 enters the connecting cavity 35 through the through hole 33 on the side wall of the hollow cavity 32 and the communication hole 34 of the valve port 27, and then enters the lower membrane cavity I16 of the left valve body 6 through the connecting cavity 35, the balance of the membrane assembly I11 is destroyed, the upward force generated overcomes the elasticity of the compression spring I13, the assembly I11 moves towards the upper membrane cavity I15, the valve seat I10 is driven by the upward membrane assembly I15, the valve seat I10 moves towards the valve seat I, the gas flow from the bottom of the valve seat I1 is driven by the valve I, the gas flow from the valve I1 is opened, the pressure regulating part 1 is opened, the pressure of the gas flow from the valve I1 is opened, and the pressure-regulated valve I10 is opened, and the pressure of the gas flow from the valve I1 is opened through the valve I1 through the valve seat I1, and the valve 1 is opened.
When the gas source at the front end of the gas pipeline is cut off, the pressure P2 of the pipeline is reduced along with the pressure reduction of the lower membrane cavity II 24 of the right valve body 7, the membrane assembly II 20 moves downwards, meanwhile, the pressure in the lower membrane cavity II 24 acts on the valve rod II 21 to generate downward force which is smaller than the upward force generated by the compression spring II 29 acting on the valve rod II 21, the valve rod II 21 moves upwards under the action of the compression spring II 29, the lower end of the membrane assembly II 20 is in contact with the upper end of the valve rod II 21 to seal, the gas flow channel of the gas inlet III 26 to the inside of the guide valve 5 is blocked, when the valve rod II 21 moves upwards, the valve seat II 22 fixedly connected with the valve rod II is driven to move upwards simultaneously, the gas outlet 28 is opened, the gas originally entering the lower membrane cavity I16 of the left valve body 6 flows back into the gas chamber 18 through the connecting cavity 35, the gas outlet 28 at the bottom of the gas chamber 18 is discharged, the gas pressure in the lower membrane cavity I16 of the left valve body 6 is restored to be the atmospheric pressure, the gas pressure under the action of the compression spring I13, the valve rod I10 moves downwards, the valve rod I10 and the valve seat I9 forms matched seal with the valve seat I9, the gas flow channel I14 is blocked, and the gas flow channel I14 enters the gas outlet 17. The pilot valve 5 automatically returns to the original state.
If the front end shut-off valve 1 is not shut off under the set pressure, the reason may be that the dust accumulation in the shut-off valve 1 is stuck, the shut-off executing component 4 is required to act under higher pressure, when the pressure of the rear end is continuously increased to the set pressure of remote control, the electromagnetic valve 37 positioned in the gas channel 36 is automatically opened, the gas with higher pressure from the gas inlet II 25 (the gas P0 from the director pressure) directly flows to the gas outlet 17 through the gas channel 36 at the electromagnetic valve 37, and flows to the shut-off executing component 4 from the gas outlet 17, the shut-off valve 1 acts, and the gas source at the front end of the gas pipeline is shut off. Or when the gas pipeline needs to be cut off remotely and manually in an emergency, the electromagnetic valve 37 on the pilot valve 5 can be opened remotely in the control room, gas from the gas inlet II 25 (gas P0 from director pressure) directly flows to the gas outlet 17 through the gas channel 36 at the electromagnetic valve 37, and flows to the cutting execution part 4 from the gas outlet 17, so that the action of the cutting valve 1 is ensured, and the safety accident is avoided.
Example 2
As a further preferred embodiment of the present invention, this embodiment is further described in detail on the basis of the above embodiment 1, in this embodiment, referring to fig. 3 of the specification, the pilot valve 5 further includes a valve body iii 38, the valve body iii 38 is located above the left valve body 6 and the right valve body 7, a through hole 52 communicating with the air outlet 17 on the left valve body 6 is provided on the valve body iii 38, and the air channel 36 is located in the valve body iii 38. In the present embodiment, the valve body iii 38 is provided, so that the processing of the gas passage 36 and the assembly of the electromagnetic valve 37 are facilitated, the gas passage 36 is provided in the valve body iii 38, the electromagnetic valve 37 inside is protected from being disturbed little by the outside, and the control accuracy is ensured.
As an implementation manner of this embodiment, the left valve body 6 includes an upper valve body i 39 and a lower valve body i 40, the valve seat i 9, the air inlet cavity i 8 and the air inlet i 14 are all located on the lower valve body i 40, the diaphragm cavity i 12 is formed between the upper valve body i 39 and the lower valve body i 40, the diaphragm assembly i 11 is fixed between the upper valve body i 39 and the lower valve body i 40, and openings for moving the valve rod i 10 are formed on both the upper valve body i 39 and the lower valve body i 40; the upper end of the compression spring I13 acts on the upper valve body I39, and the lower end acts on the upper end of the diaphragm assembly I11. The right valve body 7 comprises an upper valve body II 44 and a lower valve body II 45, the air chamber 18, the valve port 27, the valve rod II 21, the air inlet III 26, the connecting cavity 35 and the valve seat II 22 are all positioned in the lower valve body II 45, and the air inlet II 25 is positioned on the upper valve body II 44; the diaphragm assembly II 20 is positioned between the upper valve body II 44 and the lower valve body II 45.
Example 3
As a further preferred embodiment of the present invention, reference is made to fig. 3 of the accompanying drawings, which is a further detailed supplement to the technical solution of the present invention based on the above-mentioned embodiment 1 and embodiment 2. In this embodiment, as shown in fig. 3 of the specification, the left valve body 6 includes an upper valve body i 39 and a lower valve body i 40, the valve seat i 9, the air inlet chamber i 8 and the air inlet i 14 are all located on the lower valve body i 40, the diaphragm chamber i 12 is formed between the upper valve body i 39 and the lower valve body i 40, the diaphragm assembly i 11 is fixed between the upper valve body i 39 and the lower valve body i 40, and openings for moving the valve rod i 10 are formed on both the upper valve body i 39 and the lower valve body i 40; the upper end of the compression spring I13 acts on the upper valve body I39, and the lower end acts on the upper end of the diaphragm assembly I11. The diaphragm assembly I11 comprises a diaphragm I41, an upper pressure plate I42 and a lower pressure plate I43, and the diaphragm I41 is positioned between the upper pressure plate I42 and the lower pressure plate I43; the lower end of the compression spring I13 acts on the upper pressure plate I42. The valve rod I10 and the upper pressing disc I42 are fixed into a whole.
The right valve body 7 comprises an upper valve body II 44 and a lower valve body II 45, the air chamber 18, the valve port 27, the valve rod II 21, the air inlet III 26, the connecting cavity 35 and the valve seat II 22 are all positioned in the lower valve body II 45, and the air inlet II 25 is positioned on the upper valve body II 44; the diaphragm assembly II 20 is positioned between the upper valve body II 44 and the lower valve body II 45. The upper valve body II 44 is also internally provided with a guide sleeve 46, the upper end of the diaphragm assembly II 20 is connected with a valve rod III 47, the valve rod III 47 extends upwards into the guide sleeve 46, and the guide sleeve 46 is provided with a guide cavity 48 matched with the valve rod III 47. The diaphragm assembly II 20 comprises a diaphragm II 49, an upper gland II 50 and a lower gland II 51, and the diaphragm II 49 is positioned between the upper gland II 50 and the lower gland II 51. The lower end of the valve rod III 47 is fixed on the upper gland II 50, and the top end of the valve rod II 21 is in sealing fit with the bottom of the lower gland II 51. The valve port 27 is assembled at the upper end of the air chamber 18, the upper end of the valve port 27 extends into the lower membrane cavity II 24, and the bottom of the valve port 27 is conical and is in sealing fit with the upper end face of the valve seat II 22.
Claims (10)
1. The gas transmission and distribution pipe network with the remote cut-off function comprises at least one pressure regulating and cutting-off branch, wherein the pressure regulating and cutting-off branch comprises a cut-off valve (1) and a pressure regulator (2) which are sequentially arranged on the branch in series, and the cut-off valve (1) is connected with a cut-off executing component (4); the pressure regulator (2) is connected with a director (3), the director (3) is connected with the front pipeline pressure of the pressure regulator (2) and the rear pipeline pressure of the pressure regulator (2), and the director pressure is generated according to the front pipeline pressure of the pressure regulator (2) and the rear pipeline pressure of the pressure regulator (2), is connected with the pressure regulator (2) and controls the opening of the pressure regulator (2); the method is characterized in that: the pressure regulating and cutting branch circuit further comprises a pilot valve (5), the pilot valve (5) comprises a left valve body (6) and a right valve body (7), an air inlet cavity I (8), a valve seat I (9), a valve rod I (10), a diaphragm assembly I (11), a diaphragm cavity I (12) and a compression spring I (13) are arranged in the left valve body (6), the valve seat I (9) is positioned in the air inlet cavity I (8), and an air inlet I (14) is formed in the left valve body (6) at one side of the air inlet cavity I (8); the diaphragm assembly I (11) is positioned in the diaphragm cavity I (12), and divides the diaphragm cavity I (12) into an upper diaphragm cavity I (15) and a lower diaphragm cavity I (16); the compression spring I (13) is positioned in the upper membrane cavity I (15), and the lower end of the compression spring I acts on the membrane component I (11); the valve rod I (10) is a hollow valve rod, the valve rod I (10) is fixedly connected with the diaphragm assembly I (11), the upper end of the valve rod I (10) extends upwards to be connected with the air outlet (17), and the lower end of the valve rod I (10) extends into the air inlet cavity I (8) to be in sealing fit with the valve seat I (9);
an air chamber (18), a diaphragm cavity II (19), a diaphragm assembly II (20), a valve rod II (21) and a valve seat II (22) are arranged in the right valve body (7), the diaphragm assembly II (20) is positioned in the diaphragm cavity II (19), the diaphragm cavity II (19) is divided into an upper diaphragm cavity II (23) and a lower diaphragm cavity II (24), an air inlet II (25) communicated with the upper diaphragm cavity II (23) and an air inlet III (26) communicated with the lower diaphragm cavity II (24) are arranged on the right valve body (7), a valve port (27) is fixedly arranged at the upper end of the air chamber (18), the valve rod II (21) is arranged in the valve port (27), the upper end of the valve rod II (21) extends into the lower diaphragm cavity II (24) to be in sealing fit with the diaphragm assembly II (20), the lower end of the valve rod II (21) extends downwards to be fixedly connected with the valve seat II (22), the bottom of the valve port (27) is in sealing fit with the upper end face of the valve seat II (22), and an air outlet (28) penetrating through the right valve chamber (7) is arranged at the bottom of the valve port (18); under the downward pressure action of the valve rod II (21), the valve seat II (22) moves downwards along with the valve rod II (21), the upper end surface of the valve seat II (22) is unsealed from the bottom of the valve port (27), and the bottom of the valve seat II (22) seals the exhaust port (28); the upper end of the valve port (27) is also provided with a compression spring II (29), the lower end of the compression spring II (29) acts on a limiting table (30) in the valve port (27), and the upper end of the compression spring II (29) acts on a limiting step (31) of the valve rod II (21);
the upper end of the valve rod II (21) is a semi-closed hollow cavity (32) with an upward opening, a through hole (33) communicated with the valve port (27) is formed in the side wall of the hollow cavity (32), a communication hole (34) communicated with the air chamber (18) is formed in the side wall of the valve port (27), and a connecting cavity (35) is formed between the air chamber (18) of the right valve body (7) and the lower membrane cavity I (16) of the left valve body (6); a gas channel (36) is arranged between the gas inlet II (25) of the right valve body (7) and the gas outlet (17) of the left valve body (6), and a solenoid valve (37) for controlling the on-off of the gas channel (36) is arranged on the gas channel (36); pipeline pressure behind air inlet I (14) connection voltage regulator (2), air inlet II (25) link to each other with director (3), connect director pressure, pipeline pressure behind air inlet III (26) connection voltage regulator (2), cut off executive component (4) are connected in gas outlet (17).
2. The gas distribution network with remote shutoff of claim 1, wherein: the pilot valve further comprises a valve body III (38), the valve body III (38) is located above the left valve body (6) and the right valve body (7), a through hole (52) communicated with an air outlet (17) in the left valve body (6) is formed in the valve body III (38), and the air channel (36) is located in the valve body III (38).
3. A gas distribution network with remote shut-off as in claim 1 or 2, wherein: the left valve body (6) comprises an upper valve body I (39) and a lower valve body I (40), the valve seat I (9), the air inlet cavity I (8) and the air inlet I (14) are all positioned on the lower valve body I (40), the diaphragm cavity I (12) is formed between the upper valve body I (39) and the lower valve body I (40), the diaphragm assembly I (11) is fixed between the upper valve body I (39) and the lower valve body I (40), and openings for the valve rod I (10) to move are formed in the upper valve body I (39) and the lower valve body I (40); the upper end of the compression spring I (13) acts on the upper valve body I (39), and the lower end acts on the upper end of the diaphragm assembly I (11).
4. A gas distribution network with remote shut-off as defined in claim 3, wherein: the diaphragm assembly I (11) comprises a diaphragm I (41), an upper pressure plate I (42) and a lower pressure plate I (43), and the diaphragm I (41) is positioned between the upper pressure plate I (42) and the lower pressure plate I (43); the lower end of the compression spring I (13) acts on the upper pressure plate I (42).
5. The gas distribution network with remote shutoff of claim 4, wherein: the valve rod I (10) and the upper pressing plate I (42) are fixed into a whole.
6. A gas distribution network with remote shut-off as in claim 1 or 2, wherein: the right valve body (7) comprises an upper valve body II (44) and a lower valve body II (45), the air chamber (18), the valve port (27), the valve rod II (21), the air inlet III (26), the connecting cavity (35) and the valve seat II (22) are all positioned in the lower valve body II (45), and the air inlet II (25) is positioned on the upper valve body II (44); the diaphragm assembly II (20) is located between the upper valve body II (44) and the lower valve body II (45).
7. The gas distribution network with remote shutoff of claim 6, wherein: the upper valve body II (44) is internally provided with a guide sleeve (46), the upper end of the diaphragm assembly II (20) is connected with a valve rod III (47), the valve rod III (47) extends upwards into the guide sleeve (46), and the guide sleeve (46) is provided with a guide cavity (48) matched with the valve rod III (47).
8. The gas distribution network with remote shutoff of claim 7, wherein: the diaphragm assembly II (20) comprises a diaphragm II (49), an upper gland II (50) and a lower gland II (51), and the diaphragm II (49) is located between the upper gland II (50) and the lower gland II (51).
9. The gas distribution network with remote shutoff of claim 8, wherein: the lower end of the valve rod III (47) is fixed on the upper gland II (50), and the top end of the valve rod II (21) is in sealing fit with the bottom of the lower gland II (51).
10. A gas distribution network with remote shut-off as in claim 1 or 2, wherein: the valve port (27) is assembled at the upper end of the air chamber (18), the upper end of the valve port (27) extends into the lower membrane cavity II (24), and the bottom of the valve port (27) is conical and is in sealing fit with the upper end face of the valve seat II (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310074333.8A CN115789523B (en) | 2023-02-07 | 2023-02-07 | Gas transmission and distribution pipe network with remote cut-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310074333.8A CN115789523B (en) | 2023-02-07 | 2023-02-07 | Gas transmission and distribution pipe network with remote cut-off function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115789523A CN115789523A (en) | 2023-03-14 |
| CN115789523B true CN115789523B (en) | 2023-05-26 |
Family
ID=85430249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310074333.8A Active CN115789523B (en) | 2023-02-07 | 2023-02-07 | Gas transmission and distribution pipe network with remote cut-off function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115789523B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008102193A2 (en) * | 2005-08-25 | 2008-08-28 | Scripto-Tokai, Inc. | Pressure regulator |
| CN201496773U (en) * | 2009-09-23 | 2010-06-02 | 陈朋海 | Safety explosion-proof fuel gas pressure regulator |
| CN103336512A (en) * | 2013-06-29 | 2013-10-02 | 上海飞奥燃气设备有限公司 | Fuel gas transporting and distributing intelligent managing device |
| JP2013205992A (en) * | 2012-03-27 | 2013-10-07 | Fuji Koki Corp | Pressure reducing valve |
| CN203404475U (en) * | 2013-08-01 | 2014-01-22 | 郑州郑燃调压控制技术有限公司 | Stop valve and reversing device and pressure adjusting system which use stop valve |
| CN210531714U (en) * | 2019-08-13 | 2020-05-15 | 浙江班尼戈流体控制有限公司 | Intelligent pressure control valve |
| CN216046895U (en) * | 2021-10-22 | 2022-03-15 | 四川长仪油气集输设备股份有限公司 | Manual-automatic integrated intelligent self-operated pressure regulator system |
| CN216046896U (en) * | 2021-10-22 | 2022-03-15 | 四川长仪油气集输设备股份有限公司 | Remote voltage regulation control cabinet |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6978796B2 (en) * | 2002-09-25 | 2005-12-27 | Morris Ostrowiecki | Universal air valve connector |
| US7093820B2 (en) * | 2004-04-19 | 2006-08-22 | Honeywell International, Inc. | Over center high deflection pressure energizing low leakage seal |
| CN201116654Y (en) * | 2007-08-31 | 2008-09-17 | 重庆市山城燃气设备有限公司 | Two-way building combustion gas pressure regulating device box |
| CN203082330U (en) * | 2013-02-06 | 2013-07-24 | 特瑞斯能源装备股份有限公司 | Remote control system of self-operated shut-off valve |
| CN204005259U (en) * | 2014-07-24 | 2014-12-10 | 北京正拓气体科技有限公司 | A kind of gas pressure regulation and safety installations |
| CN205745586U (en) * | 2016-06-23 | 2016-11-30 | 环球阀门集团有限公司 | Full-automatic explosion-proof quick action emergency valve |
| CN206036363U (en) * | 2016-08-16 | 2017-03-22 | 四川长仪油气集输设备股份有限公司 | Collection superpressure cut off with valve after voltage stabilizing function voltage regulator as an organic whole |
| CN106382408B (en) * | 2016-12-12 | 2018-08-31 | 乐山川天燃气输配设备有限公司 | Hyper-pressure pressure-loss cut-out type pressure regulator |
| CN112032376A (en) * | 2020-09-09 | 2020-12-04 | 陈建清 | Overload automatic cut-off safety valve |
| CN216407745U (en) * | 2021-11-06 | 2022-04-29 | 武汉钢铁集团气体有限责任公司 | Automatic cut-off device for hydrogen filling |
| CN114688264A (en) * | 2022-04-08 | 2022-07-01 | 济南蓝信电子设备有限公司 | Electromagnetic gas emergency cut-off valve capable of being opened under pressure |
-
2023
- 2023-02-07 CN CN202310074333.8A patent/CN115789523B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008102193A2 (en) * | 2005-08-25 | 2008-08-28 | Scripto-Tokai, Inc. | Pressure regulator |
| CN201496773U (en) * | 2009-09-23 | 2010-06-02 | 陈朋海 | Safety explosion-proof fuel gas pressure regulator |
| JP2013205992A (en) * | 2012-03-27 | 2013-10-07 | Fuji Koki Corp | Pressure reducing valve |
| CN103336512A (en) * | 2013-06-29 | 2013-10-02 | 上海飞奥燃气设备有限公司 | Fuel gas transporting and distributing intelligent managing device |
| CN203404475U (en) * | 2013-08-01 | 2014-01-22 | 郑州郑燃调压控制技术有限公司 | Stop valve and reversing device and pressure adjusting system which use stop valve |
| CN210531714U (en) * | 2019-08-13 | 2020-05-15 | 浙江班尼戈流体控制有限公司 | Intelligent pressure control valve |
| CN216046895U (en) * | 2021-10-22 | 2022-03-15 | 四川长仪油气集输设备股份有限公司 | Manual-automatic integrated intelligent self-operated pressure regulator system |
| CN216046896U (en) * | 2021-10-22 | 2022-03-15 | 四川长仪油气集输设备股份有限公司 | Remote voltage regulation control cabinet |
Non-Patent Citations (1)
| Title |
|---|
| 高学玲 ; .远程调压与调流在天然气管网的安全应用.上海煤气.2010,(01),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115789523A (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10678274B2 (en) | Adjustable deadband control system | |
| US4188972A (en) | Gas valve assembly | |
| US5740833A (en) | Gas pressure regulator | |
| US3107693A (en) | Pneumatic relay | |
| US4802507A (en) | Gas flow control device | |
| JPH07151107A (en) | Feedback poppet valve | |
| RU2612236C2 (en) | Fluid medium flow control device (versions) and process control system with fluid medium | |
| US8528583B2 (en) | Pneumatic amplifier and arrangement for regulating a regulating armature of a process plant | |
| US3090592A (en) | Stepped-opening diaphragm gas valve | |
| CN102494164B (en) | Gas adaptive integration valve with double air sources | |
| RU2634989C2 (en) | Valve assembly | |
| CN115789523B (en) | Gas transmission and distribution pipe network with remote cut-off function | |
| CN219529974U (en) | Pilot valve with remote cut-off function | |
| CN213236267U (en) | Automatic valve position maintaining control system for regulating valve | |
| US2966927A (en) | Pressure responsive pilot valve for valve motor operation | |
| US2630820A (en) | Gas metering system control | |
| US3478780A (en) | Irrigation valving | |
| CN101275679B (en) | Pilot valve unit for actuator control | |
| US3433249A (en) | Liquid level controller | |
| US3485270A (en) | Electro-magnetic fluid flow control devices | |
| US3880186A (en) | Flow control devices | |
| JPH04297906A (en) | Fluid pressure controller | |
| RU2675763C1 (en) | Pressure controller of direct action | |
| US2965128A (en) | Pressure regulator | |
| AU2017235903B2 (en) | A regulator assembly for a pressurised gas cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |