Pressure regulating device and maintenance method thereof

Abstract

The invention provides a pressure regulating device and a maintenance method thereof, and belongs to the field of pipeline valves. The pressure regulating device comprises a pressure regulator, a pressure guide pipe filter and a director, the first pipeline and the second pipeline are communicated with the pressure regulator, one end of the third pipeline is communicated with the pressure regulator, and the other end of the third pipeline is communicated with the pressure guide pipe filter; one end of the fourth pipeline is communicated with the pressure guide pipe filter and the other end is communicated with the director; one end of the fifth pipeline is communicated with the director, and the other end of the fifth pipeline is communicated with the second pipeline; one end of the sixth pipeline is communicated with the director, and the other end of the sixth pipeline is communicated with the pressure regulator; one end of the seventh pipeline is communicated with the pressure regulator, and the other end is communicated with the second pipeline; the eighth pipeline is communicated with the fourth pipeline; and the fourth valve is arranged on the eighth pipeline. The pressure regulating device can effectively reduce gas loss during maintenance and reduce energy waste.

Description

Technical Field

[0001] The present disclosure relates to the field of pipeline valves, and in particular to a pressure regulating device and a maintenance method thereof. Background Art

[0002] The pressure regulating device is a device for controlling the gas flow rate in a pipeline. The pressure regulating device includes a pressure regulator, a controller, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline. The pressure regulator is arranged at the critical point between the first pipeline and the second pipeline, the third pipeline is connected to the first pipeline, the fourth pipeline is connected to the second pipeline, the controller is arranged at the critical point between the third pipeline and the fourth pipeline, and the controller is connected to the pressure regulator through the fifth pipeline, one end of the sixth pipeline is connected to the pressure regulator, and the other end of the sixth pipeline is connected to the second pipeline. During the gas transmission process, the third pipeline transmits part of the upstream gas to the controller, and the fourth pipeline transmits part of the downstream gas to the controller. The controller controls the opening of the controller based on the pressure of the gas provided by the third pipeline and the fourth pipeline, so that the upstream gas can enter the pressure regulator through the fifth pipeline, and the pressure regulator controls the opening of the pressure regulator valve based on the gas pressure provided by the fifth pipeline. Finally, the upstream gas in the first pipeline enters the second pipeline through the pressure regulator to become the downstream gas.

[0003] In the related art, the filter in the pilot will filter the gas delivered to the pilot, and the impurities in the gas will remain in the filter. In order to prevent the impurities from clogging the filter, the impurities in the pilot filter need to be cleaned frequently. In the related art, based on the impurity content in the gas, the cleaning frequency of the pilot filter is 1 to 3 times per week.

[0004] When cleaning the pilot filter, the gas delivery of the first pipeline and the second pipeline will be stopped, and the gas in the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the sixth pipeline will be emptied before cleaning the pilot filter. Since the pilot filter is cleaned frequently, each time the gas in the above pipelines is emptied, a large amount of energy will be wasted. In addition, since the rubber ring and other parts of the filter will be replaced when cleaning the pilot filter, the loss of the rubber ring and other parts makes the cleaning cost high. Summary of the invention

[0005] The disclosed embodiment provides a pressure regulating device and a maintenance method thereof, which can reduce gas loss during maintenance, avoid a large amount of energy waste, and also reduce maintenance costs. The technical solution is as follows:

[0006] In one aspect, a voltage regulating device is provided, the device comprising:

[0007] Pressure regulator, pressure pipe filter, pilot, first pipeline, second pipeline, third pipeline, fourth pipeline, fifth pipeline, sixth pipeline, seventh pipeline, eighth pipeline, first valve, second valve, third valve, fourth valve;

[0008] The voltage regulator has a first voltage regulator air inlet, a second voltage regulator air inlet, a third voltage regulator air inlet, a first voltage regulator air outlet and a second voltage regulator air outlet; the pilot has a first pilot air inlet, a second pilot air inlet and a pilot air outlet;

[0009] The first pipeline is communicated with the air inlet of the first pressure regulator, and the second pipeline is communicated with the air outlet of the second pressure regulator; one end of the third pipeline is communicated with the air outlet of the first pressure regulator, and the other end of the third pipeline is communicated with the air inlet of the pressure pipe filter, and the first valve is arranged on the third pipeline; one end of the fourth pipeline is communicated with the air outlet of the pressure pipe filter, and the other end of the fourth pipeline is communicated with the air inlet of the first controller; one end of the fifth pipeline is communicated with the air inlet of the second controller, and the other end of the fifth pipeline is communicated with the second pipeline, and the second valve is arranged on the fifth pipeline; one end of the sixth pipeline is communicated with the air outlet of the controller, and the other end of the sixth pipeline is communicated with the air inlet of the second pressure regulator, and the third valve is arranged on the sixth pipeline; one end of the seventh pipeline is communicated with the second pipeline, and the other end of the seventh pipeline is communicated with the air inlet of the third pressure regulator; the eighth pipeline is communicated with the third pipeline, and the fourth valve is arranged on the eighth pipeline.

[0010] Optionally, the device further comprises:

[0011] the ninth pipe, the fifth valve and the sixth valve;

[0012] The fifth valve is arranged on the ninth pipeline, and the sixth valve is arranged on the fourth pipeline;

[0013] One end of the ninth pipeline is connected to the third pipeline, and the other end of the ninth pipeline is connected to the fourth pipeline. The connection point between the ninth pipeline and the third pipeline is located between the first valve and the first pressure regulator outlet, and the connection point between the ninth pipeline and the fourth pipeline is located between the sixth valve and the first controller inlet.

[0014] Optionally, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are ball valves respectively.

[0015] Optionally, the pressure pipe filter is a basket filter.

[0016] Optionally, the voltage regulator is a fail-safe normally closed voltage regulator.

[0017] Optionally, the controller is a fail-safe normally closed controller.

[0018] On the other hand, a maintenance method of a pressure regulating device is provided, wherein the pressure regulating device is the pressure regulating device as described above, and the method comprises:

[0019] When the maintenance frequency of the pressure pipe filter is met, closing the first valve, the second valve and the third valve;

[0020] Open the fourth valve to exhaust the gas in the third pipeline between the first valve and the air inlet of the pressure pipe filter and the fourth pipeline between the air outlet of the pressure pipe filter and the sixth valve;

[0021] The pressure pipe filter is maintained.

[0022] Optionally, the voltage regulating device further includes:

[0023] the ninth pipe, the fifth valve and the sixth valve;

[0024] The fifth valve is arranged on the ninth pipeline, and the sixth valve is arranged on the fourth pipeline;

[0025] One end of the ninth pipeline is in communication with the third pipeline, and the other end of the ninth pipeline is in communication with the fourth pipeline. The connection point between the ninth pipeline and the third pipeline is located between the first valve and the first pressure regulator outlet, and the connection point between the ninth pipeline and the fourth pipeline is located between the sixth valve and the first controller inlet.

[0026] Before maintaining the pressure pipe filter, the method further includes:

[0027] The fifth valve is opened, and the sixth valve is closed.

[0028] Optionally, the method further comprises:

[0029] When the maintenance frequency of the controller is met, closing the first valve, the second valve, and the third valve;

[0030] Opening the fourth valve to exhaust the gas in the fourth pipeline, the fifth pipeline between the gas inlet of the second pilot and the second valve, and the sixth pipeline between the gas outlet of the pilot and the third valve;

[0031] Perform maintenance on the pilot.

[0032] Optionally, the maintenance frequency of the pressure pipe filter is 7 to 10 days / time, and the maintenance frequency of the controller is lower than the maintenance frequency of the pressure pipe filter.

[0033] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0034] In the disclosed embodiment, the pressure regulating device has a pressure pipe filter, through which the upstream gas is initially filtered, and then the upstream gas is secondary filtered through the controller, so that the amount of impurities remaining in the filter screen of the controller will be reduced, thereby reducing the maintenance frequency of the controller. Since the filter screen rubber ring and other components need to be replaced during maintenance of the controller, but the pressure pipe filter does not need to be replaced, by reducing the maintenance frequency of the controller, the loss of the filter screen rubber ring and other components is reduced, thereby reducing the maintenance cost. At the same time, a first valve, a second valve, a third valve and a fourth valve are set. When maintaining the pressure pipe filter and the controller, the first valve, the second valve and the third valve are closed, and the fourth valve is opened. It is only necessary to empty the gas in the fourth pipeline, the fifth pipeline between the air inlet of the second controller and the second valve, and the sixth pipeline between the air outlet of the controller and the third valve through the eighth pipeline. Compared with the solution of the related art, less air needs to be removed, thereby reducing energy waste during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 is a structural schematic diagram of a voltage regulating device provided in an embodiment of the present disclosure;

[0037] Figure 2 is a structural schematic diagram of a voltage regulator provided by an embodiment of the present disclosure;

[0038] Figure 3 is a flow chart of a maintenance method of a pressure regulating device provided by an embodiment of the present disclosure;

[0039] Figure 4 It is a flow chart of another maintenance method of a pressure regulating device provided in an embodiment of the present disclosure.

[0040] The reference numerals are as follows:

[0041] 101: pressure regulator; 102: pressure pipe filter; 103: controller; 104: first pipeline; 105: second pipeline; 106: third pipeline; 107: fourth pipeline; 108: fifth pipeline; 109: sixth pipeline; 110: seventh pipeline; 111: eighth pipeline; 112: ninth pipeline; 113: first valve; 114: second valve; 115: third valve; 116: fourth valve; 117: fifth valve; 118: sixth valve; 119: first pressure regulator air inlet; 120: second pressure regulator air inlet; 121: third pressure regulator air inlet; 122: first pressure regulator air outlet; 123: second pressure regulator air outlet; 124: first controller air inlet; 125: second controller air inlet; 126: controller air outlet.

[0042] 201: voltage regulator body; 202: first cavity; 203: second cavity; 204: transmission rod; 205: first partition plate; 206: second partition plate; 207: spring; 208: connecting rod; 209: first part; 210: second part. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0044] Figure 1 Schematic diagram of the structure of a voltage regulator pilot device provided by an embodiment of the present disclosure. Figure 1 The device includes: a pressure regulator 101, a pressure pipe filter 102, a controller 103, a first pipeline 104, a second pipeline 105, a third pipeline 106, a fourth pipeline 107, a fifth pipeline 108, a sixth pipeline 109, a seventh pipeline 110, an eighth pipeline 111, a first valve 113, a second valve 114, a third valve 115, and a fourth valve 116;

[0045] The pressure regulator 101 has a first pressure regulator air inlet 119, a second pressure regulator air inlet 120, a third pressure regulator air inlet 121, a first pressure regulator air outlet 122 and a second pressure regulator air outlet 123; the controller 103 has a first controller air inlet 124, a second controller air inlet 125 and a controller air outlet 126; the first pipeline 104 is connected to the first pressure regulator air inlet 119, and the second pipeline 105 is connected to the second pressure regulator air outlet 123; one end of the third pipeline 106 is connected to the first pressure regulator air outlet 122, and the other end of the third pipeline 106 is connected to the air inlet of the pressure pipe filter 102, and the first valve 113 is arranged on the third pipeline 106; one end of the fourth pipeline 107 is connected to the air outlet of the pressure pipe filter 102, and the The other end of the fourth pipeline 107 is communicated with the first controller air inlet 124; one end of the fifth pipeline 108 is communicated with the second controller air inlet 125, the other end of the fifth pipeline 108 is communicated with the second pipeline 105, and the second valve 114 is arranged on the fifth pipeline 108; one end of the sixth pipeline 109 is communicated with the controller air outlet 126, the other end of the sixth pipeline 109 is communicated with the second pressure regulator air inlet 120, and the third valve 115 is arranged on the sixth pipeline 109; one end of the seventh pipeline 110 is communicated with the second pipeline 105, the other end of the seventh pipeline 110 is communicated with the third pressure regulator air inlet 121; the eighth pipeline 111 is communicated with the fourth pipeline 107, and the fourth valve 116 is arranged on the eighth pipeline 111.

[0046] In the disclosed embodiment, the pressure regulating device has a pressure pipe filter, through which the upstream gas is initially filtered, and then the upstream gas is secondary filtered through the controller, so that the amount of impurities remaining in the filter screen of the controller will be reduced, thereby reducing the maintenance frequency of the controller. Since the filter screen rubber ring and other components need to be replaced during maintenance of the controller, but the pressure pipe filter does not need to be replaced, by reducing the maintenance frequency of the controller, the loss of the filter screen rubber ring and other components is reduced, thereby reducing the maintenance cost. At the same time, a first valve, a second valve, a third valve and a fourth valve are set. When maintaining the pressure pipe filter and the controller, the first valve, the second valve and the third valve are closed, and the fourth valve is opened. It is only necessary to empty the gas in the fourth pipeline, the fifth pipeline between the air inlet of the second controller and the second valve, and the sixth pipeline between the air outlet of the controller and the third valve through the eighth pipeline, thereby reducing energy waste during maintenance.

[0047] In the embodiment of the present disclosure, the voltage regulator 101 is a fail-safe normally closed voltage regulator.

[0048] In the disclosed embodiment, the above-mentioned type of pressure regulator 101 is used. When the controller 103 is being maintained, if the controller 103 does not supply upstream gas to the pressure regulator 101, the pressure regulator 101 will shut down automatically to avoid the downstream gas pressure from getting out of control when the controller 103 is being maintained.

[0049] In the disclosed embodiment, the pressure pipe filter 102 is a basket filter.

[0050] The use of the above-mentioned type of pressure pipe filter 102 can effectively filter impurities in the gas, preventing the gas from still including a large amount of impurities after passing through the pressure pipe filter 102, thereby failing to effectively reduce the maintenance frequency of the controller 103.

[0051] In the disclosed embodiment, the pilot 103 is a fail-safe normally closed pilot.

[0052] In the embodiment of the present disclosure, the above-mentioned type of commander 103 is adopted. When the gas delivery is stopped, the commander 103 will close automatically, thereby making it easier to control the gas.

[0053] In the embodiment of the present disclosure, the first valve 113 , the second valve 114 , the third valve 115 , the fourth valve 116 , the fifth valve 117 and the sixth valve 118 are ball valves.

[0054] In the embodiment of the present disclosure, ball valves are used as the first valve 113 , the second valve 114 , the third valve 115 , the fourth valve 116 , the fifth valve 117 and the sixth valve 118 to facilitate gas control.

[0055] In other embodiments, the pressure regulator 101, the pressure pipe filter 102, the controller 103 and each valve may also be of other types, and the present disclosure does not limit this.

[0056] In the embodiment of the present disclosure, the function of the first pipeline 104 is to transport the upstream gas to the interior of the pressure regulator 101. A part of the upstream gas transported to the interior of the pressure regulator 101 by the first pipeline 104 will be transported to the third pipeline 106 through the first pressure regulator outlet 122, and another part of the upstream gas transported to the interior of the pressure regulator 101 by the first pipeline 104 will be transported to the second pipeline 105 through the second pressure regulator outlet 123 to become downstream gas. The third pipeline 106 transports the upstream gas to the pressure pipe filter 102 for filtration, and then the upstream gas is transported to the commander 103 through the fourth pipeline 107. The fifth pipeline 108 transports the downstream gas to the inside of the commander 103. The commander controls the upstream gas to be transported to the inside of the pressure regulator 101 through the sixth pipeline 109 based on the gas pressure difference between the fourth pipeline 107 and the fifth pipeline 108. The seventh pipeline 110 is used to transport the downstream gas to the inside of the pressure regulator 101. The pressure regulator 101 controls the upstream gas of the first pipeline 104 to be transported to the second pipeline 105 based on the pressure of the upstream gas transported by the sixth pipeline 109 and the downstream gas transported by the seventh pipeline 110. The eighth pipeline 111 is used to exhaust the gas in the pipeline.

[0057] In the embodiment of the present disclosure, during the above-mentioned gas delivery process, the first valve 113, the second valve 114 and the third valve 115 are in an open state, and the fourth valve 116 is in a closed state.

[0058] In the disclosed embodiment, when performing maintenance on the commander 103, the first valve 113, the second valve 114 and the third valve 115 are in a closed state, the fourth valve 116 is in an open state, and the gas in the pipeline connected to the commander 103 is emptied through the eighth pipeline 111 to facilitate maintenance of the commander 103.

[0059] In the embodiment of the present disclosure, when maintaining the pressure pipe filter 102, the first valve 113, the second valve 114 and the third valve 115 are in a closed state, and the fourth valve 116 is in an open state. The gas in the pipeline connected to the pressure pipe filter 102 is emptied through the eighth pipeline 111 to facilitate the maintenance of the pressure pipe filter 102.

[0060] Therefore, it can be seen that by providing the eighth pipeline 111 and the fourth valve 116, the function of removing air from the controller 103 and the pressure pipe filter 102 during maintenance can be simultaneously achieved.

[0061] In the embodiment of the present disclosure, when the above-mentioned gas delivery is performed, the upstream gas delivered to the interior of the commander 103 and the downstream gas delivered to the interior of the commander 103 are respectively located in different cavities in the commander 103. The commander 103 controls the flow rate of the upstream gas delivered to the pressure regulator 101 by the sixth pipeline 109 based on the pressures of the upstream gas and the downstream gas, thereby controlling the pressure of the upstream gas delivered to the interior of the pressure regulator 101.

[0062] In the embodiment of the present disclosure, when the above-mentioned gas delivery is performed, the upstream gas delivered to the pressure regulator 101 by the first pipeline 104 and the upstream gas output by the third pipeline 106 are located in the same cavity of the pressure regulator 101. The upstream gas delivered to the pressure regulator 101 by the commander 103 and the upstream gas delivered to the pressure regulator 101 by the first pipeline 104 are located in different cavities in the pressure regulator 101. The upstream gas in the pressure regulator 101 and the downstream gas delivered to the pressure regulator 101 by the seventh pipeline 110 are located in different cavities in the pressure regulator 101. The pressure regulator 101 controls the valve opening of the pressure regulator 101 based on the pressure of the upstream gas delivered to the pressure regulator 101 by the commander 103 and the pressure of the downstream gas delivered to the pressure regulator 101 by the seventh pipeline 110, thereby controlling the gas flow delivered to the second pipeline 105 by the first pipeline 104, thereby controlling the pressure of the downstream gas.

[0063] Figure 2 This is a schematic diagram of the structure of a voltage regulator provided by an embodiment of the present disclosure. Figure 2 The voltage regulator includes: a voltage regulator body 201, a first cavity 202, a second cavity 203, a transmission rod 204, a first separator 205, a second separator 206, a spring 207 and a connecting rod 208;

[0064] The first cavity 202 is in communication with the first voltage regulator air inlet 119, the first voltage regulator air outlet 122, and the second voltage regulator air outlet 123, and the second voltage regulator air outlet 123 is separated from the first cavity 202 by the first partition sheet 205;

[0065] The first separator 205 is connected to the spring 207 through a connecting rod 208, the spring 207 is connected to one end of the transmission rod 204, and the other end of the transmission rod 204 is connected to the second separator 206. The second separator 206 is located in the second cavity 203 and divides the second cavity 203 into a first part 209 and a second part 210. The first part 209 is connected to the second voltage regulator air inlet 120, and the second part 210 is connected to the third voltage regulator air inlet 121.

[0066] In the disclosed embodiment, when the pressure regulator of the above structure is used to form a controller pressure regulator device, it is more convenient to control the downstream gas pressure. When the gas is transported, the upstream gas enters the first cavity and is transported to the controller through the first pressure regulator outlet connected to the first cavity. The controller transports the upstream gas to the first part of the second cavity in the pressure regulator through the second pressure regulator inlet according to the downstream gas pressure, and the downstream gas is transported to the second part of the second cavity through the third pressure regulator inlet. There is a second separator between the first part and the second part, and the pressure difference between the first part and the second part is used to control the movement of the transmission rod, thereby controlling the movement of the first separator. When the first separator moves up, the opening of the pressure regulator valve becomes larger, and when the first separator moves down, the opening of the pressure regulator valve becomes smaller.

[0067] In the embodiment of the present disclosure, the controller 103 and the pressure regulator 101 function to control the flow rate of the gas delivered from the first pipeline 104 to the second pipeline 105. The controller 103 controls the flow rate of the upstream gas delivered from the sixth pipeline 109 to the pressure regulator 101 through the pressure of the upstream gas delivered from the fourth pipeline 107 and the pressure of the downstream gas delivered from the fifth pipeline 108, and the pressure regulator 101 controls the flow rate of the gas delivered from the first pipeline 104 to the second pipeline 105 based on the pressure of the upstream gas delivered from the sixth pipeline 109 and the pressure of the downstream gas delivered from the seventh pipeline 110. If the pressure of the downstream gas decreases, the pressure of the downstream gas transported to the controller 103 by the fifth pipeline 108 decreases, so that the valve opening in the controller 103 increases, and the gas flow of the upstream gas transported to the pressure regulator 101 by the sixth pipeline 109 increases. The pressure of the upstream gas transported to the pressure regulator 101 by the controller 103 increases, and the corresponding valve opening in the pressure regulator 101 increases, so that the gas flow transported from the first pipeline 104 to the second pipeline 105 through the valve increases, thereby increasing the downstream gas flow to increase the downstream gas pressure.

[0068] If the downstream gas pressure increases, according to the same principle, the valve opening in the controller 103 becomes smaller, and the upstream gas flow delivered by the controller 103 to the inside of the pressure regulator 101 becomes smaller, so that the upstream gas pressure delivered by the controller 103 to the inside of the pressure regulator 101 becomes smaller, and the valve opening in the pressure regulator 101 becomes smaller, thereby reducing the gas flow delivered by the first pipeline 104 to the second pipeline 105, so as to reduce the downstream gas pressure. Through the above principle, the pressure regulating device controls the downstream gas pressure to remain stable.

[0069] The above is the principle of the automatic operation of the pressure regulating device. In actual use, the valve opening of the pilot 103 can be manually controlled. For example, the pilot 103 has a control screw, and the gas flow rate of the upstream gas delivered by the pilot 103 to the pressure regulator 101 can be manually controlled by the control screw. By tightening the control screw in the pilot, the valve opening of the pilot 103 will become larger, thereby increasing the pressure of the upstream gas delivered to the inside of the pressure regulator 101, and the valve opening of the pressure regulator 101 will also increase, thereby increasing the gas flow rate delivered to the eighth pipeline 111 to enhance the downstream gas pressure.

[0070] Correspondingly, by loosening the control screw of the controller 103, the valve opening of the controller 103 becomes smaller, thereby reducing the pressure of the upstream gas delivered to the inside of the pressure regulator 101, and the valve opening of the pressure regulator 101 will become smaller, thereby reducing the gas flow delivered from the first pipeline 104 to the eighth pipeline 111 to reduce the downstream gas pressure.

[0071] See again Figure 1 In the disclosed embodiment, the pressure regulating device further includes: a ninth pipeline 112, a fifth valve 117 and a sixth valve 118;

[0072] The fifth valve 117 is disposed on the ninth pipeline 112 , and the sixth valve 118 is disposed on the fourth pipeline 107 ;

[0073] One end of the ninth pipeline 112 is connected to the third pipeline 106, and the other end of the ninth pipeline 112 is connected to the fourth pipeline 107. The connection point between the ninth pipeline 112 and the third pipeline 106 is located between the first valve 113 and the first pressure regulator outlet 122, and the connection point between the ninth pipeline 112 and the fourth pipeline 107 is located between the sixth valve 118 and the first controller inlet 124.

[0074] In the embodiment of the present disclosure, after the ninth pipeline 112, the fifth valve 117 and the sixth valve 118 are set in the pressure regulating device, when the pressure pipe filter 102 is maintained, the upstream gas can be transported to the controller 103 through the ninth pipeline 112, so that the downstream gas pressure can still be controlled during the maintenance of the pressure pipe filter 102. When the gas is transported, multiple pipelines are transported simultaneously, and each pipeline is provided with the above-mentioned pressure regulating device. If one of the pressure regulating devices is maintained, the gas transportation of the pipeline is stopped, which will cause the gas volume in other pipelines to increase, which is easy to cause the filter in the remaining pipelines to be blocked. The above-mentioned structure is set in the pressure regulating device to avoid the filter from being blocked. In addition, after the sixth valve 118 is set, when the pressure pipe filter 102 is maintained, it is only necessary to vent the gas in the third pipeline 106 between the first valve 113 and the air inlet of the pressure pipe filter 102 and the fourth pipeline 107 between the air outlet of the pressure pipe filter 102 and the sixth valve 118, so as to further reduce the gas loss. Furthermore, the combination of the pressure pipe filter 102 can reduce the maintenance frequency of the controller 103, thereby significantly reducing the gas loss during maintenance.

[0075] It is worth noting that after the ninth pipeline 112, the fifth valve 117 and the sixth valve 118 are set, when the gas is supplied, the fifth valve 117 is in a closed state and the sixth valve 118 is in an open state. When the pressure pipe filter is maintained, the fifth valve 117 is in an open state and the sixth valve 118 is in a closed state. When the controller is maintained, the fifth valve 117 is in a closed state and the sixth valve 118 is in an open state.

[0076] In the disclosed embodiment, the maintenance frequency of the commander 103 is 3 to 4 months.

[0077] Exemplarily, the maintenance frequency of the controller 103 is once every three months.

[0078] In the disclosed embodiment, the maintenance frequency of the pressure pipe filter 102 is 7 to 10 days per time.

[0079] Exemplarily, the maintenance frequency of the pressure pipe filter 102 is once every 7 days.

[0080] In the disclosed embodiment, according to the situation in the related art where 9 first pipelines simultaneously transport gas, where the upstream gas pressure is 6Mpa, about 135 cubic meters of gas need to be vented when cleaning the filter in the controller in each pipeline. Cleaning the controller filter once a week and increasing the frequency during special periods requires about 220 disassembly inspections throughout the year. After adopting the pressure regulating device in this solution, the venting of natural gas can be effectively reduced by about 29,000 cubic meters per year. At the same time, since the cleaning frequency of the controller is reduced, the consumption of materials such as filter rubber rings is reduced, which greatly saves material consumption. In addition, the maintenance and disassembly time can be shortened from 1 hour to 10 minutes, which greatly reduces maintenance time and reduces employee labor intensity.

[0081] Figure 3 A flow chart of a maintenance method for a pressure regulating device provided in an embodiment of the present disclosure. Figure 3 The method steps include:

[0082] S31. When the maintenance frequency of the pressure guiding pipe filter is met, close the first valve, the second valve and the third valve.

[0083] S32, opening the fourth valve to exhaust the gas in the third pipeline between the first valve and the air inlet of the pressure-conducting pipe filter and the fourth pipeline between the air outlet of the pressure-conducting pipe filter and the sixth valve.

[0084] S33, maintaining the pressure pipe filter.

[0085] In the disclosed embodiment, when maintaining the pressure pipe filter, the first valve, the second valve and the third valve are closed, and the fourth valve is opened. It is only necessary to evacuate the gas in the fourth pipeline, the fifth pipeline between the air inlet of the second controller and the second valve, and the sixth pipeline between the air outlet of the controller and the third valve through the eighth pipeline, thereby reducing energy waste during maintenance.

[0086] Figure 4 Another flow chart of the maintenance method of the pilot pressure regulator provided by the embodiment of the present disclosure. Figure 4 The method steps include:

[0087] S41. When the maintenance frequency of the pressure guiding pipe filter is met, close the first valve, the second valve and the third valve.

[0088] In one example, when the pressure regulating device does not include the ninth pipeline, the fifth valve, and the sixth valve, step S41 includes:

[0089] Close the first valve, the second valve and the third valve in sequence to stop the delivery of the transport gas.

[0090] After closing the above valves in sequence, there are still upstream gas and downstream gas in the pipeline. However, since the fifth pipeline does not transport downstream gas to the commander, the commander valve will be closed to stop transporting the upstream gas to the pressure regulator. Since the pressure regulator does not receive the upstream gas transported by the commander, the pressure regulator will also close the valve to stop transporting the gas in the first pipeline to the second pipeline.

[0091] Exemplarily, the maintenance frequency of the pressure pipe filter is 7 to 10 days per time.

[0092] For example, the maintenance frequency of the pressure pipe filter is once every 7 days.

[0093] In the disclosed embodiment, a pressure pipe filter is provided to reduce the maintenance frequency of the pilot. By reducing the maintenance frequency of the pilot, the gas loss during maintenance of the pilot and the loss of the rubber ring and other components are reduced, thereby reducing the maintenance cost.

[0094] In another example, when the pressure regulating device includes a ninth pipeline, a fifth valve, and a sixth valve, step S41 includes:

[0095] Open the fifth valve, and close the first valve and the sixth valve in sequence.

[0096] First, open the fifth valve, connect the ninth pipeline, and transport the upstream gas to the controller through the ninth pipeline and the pressure pipe filter at the same time. Then close the first valve and the sixth valve, isolate the pressure pipe filter, and transport the upstream gas to the controller through the ninth pipeline.

[0097] It is worth noting that at this time, the second valve and the third valve are in the open state.

[0098] S42, opening the fourth valve to exhaust the gas in the third pipeline between the first valve and the air inlet of the pressure-conducting pipe filter and the fourth pipeline between the air outlet of the pressure-conducting pipe filter and the sixth valve.

[0099] When the pressure regulating device includes a ninth pipeline, a fifth valve and a sixth valve, step S42 further includes:

[0100] Open the fourth valve to exhaust the gas in the third pipeline between the first valve and the air inlet of the pressure pipe filter and the fourth pipeline between the air outlet of the pressure pipe filter and the sixth valve.

[0101] S43, maintaining the pressure pipe filter.

[0102] In one example, when the pressure regulating device does not include the ninth pipeline, the fifth valve and the sixth valve, step S43 includes:

[0103] The first step is to clean the impurities in the pressure pipe filter.

[0104] The second step is to close the fourth valve after the pressure pipe filter maintenance is completed, and open the first valve, the second valve and the third valve in sequence to continue to transport the gas.

[0105] In another example, when the pressure regulating device includes a ninth pipeline, a fifth valve, and a sixth valve, step S43 includes:

[0106] The first step is to clean the impurities in the pressure pipe filter.

[0107] The second step is to close the fourth valve after the pressure pipe filter maintenance is completed, and then open the first valve and the sixth valve in sequence, and then close the fifth valve to continue to transport gas.

[0108] S44. When the maintenance frequency of the controller is met, close the first valve, the second valve, and the third valve.

[0109] In one example, step S44 includes:

[0110] Close the first valve, the second valve and the third valve in sequence to stop gas delivery.

[0111] Exemplarily, the maintenance frequency of the pilot is once every 3 to 4 months.

[0112] For example, the maintenance frequency of the pilot is once every three months.

[0113] In the disclosed embodiment, the pilot is maintained at the above maintenance frequency, which reduces the gas loss and maintenance cost while ensuring that the pilot will not be blocked.

[0114] S45, opening the fourth valve to exhaust the gas in the fourth pipeline, the fifth pipeline between the second controller air inlet and the second valve, and the sixth pipeline between the controller air outlet and the third valve.

[0115] When the fourth valve is opened, the gas in the pipeline connected to the pilot will be discharged under the action of pressure.

[0116] S46. Maintain the controller.

[0117] In one example, step S46 includes:

[0118] The first step is to clean the impurities in the pilot filter and replace the filter rubber ring and other parts.

[0119] The second step is to close the fourth valve, and open the first valve, the second valve and the third valve in sequence to continue to transport the gas.

[0120] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A voltage regulating device, characterized in that: The device comprises: A pressure regulator (101), a pressure pipe filter (102), a controller (103), a first pipeline (104), a second pipeline (105), a third pipeline (106), a fourth pipeline (107), a fifth pipeline (108), a sixth pipeline (109), a seventh pipeline (110), an eighth pipeline (111), a first valve (113), a second valve (114), a third valve (115), and a fourth valve (116); The pressure regulator (101) has a first pressure regulator air inlet (119), a second pressure regulator air inlet (120), a third pressure regulator air inlet (121), a first pressure regulator air outlet (122) and a second pressure regulator air outlet (123); the controller (103) has a first controller air inlet (124), a second controller air inlet (125) and a controller air outlet (126); The first pipeline (104) is in communication with the air inlet (119) of the first pressure regulator, and the second pipeline (105) is in communication with the air outlet (123) of the second pressure regulator; one end of the third pipeline (106) is in communication with the air outlet (122) of the first pressure regulator, and the other end of the third pipeline (106) is in communication with the air inlet of the pressure pipe filter (102), and the first valve (113) is arranged on the third pipeline (106); one end of the fourth pipeline (107) is in communication with the air outlet of the pressure pipe filter (102), and the other end of the fourth pipeline (107) is in communication with the air inlet (124) of the first controller; one end of the fifth pipeline (108) is in communication with the air inlet (125) of the second controller, and the fifth pipeline (108) is in communication with the air outlet of the pressure pipe filter (102). The other end of the pipeline (108) is in communication with the second pipeline (105), and the second valve (114) is arranged on the fifth pipeline (108); one end of the sixth pipeline (109) is in communication with the air outlet (126) of the controller, the other end of the sixth pipeline (109) is in communication with the air inlet (120) of the second pressure regulator, and the third valve (115) is arranged on the sixth pipeline (109); one end of the seventh pipeline (110) is in communication with the second pipeline (105), and the other end of the seventh pipeline (110) is in communication with the air inlet (121) of the third pressure regulator; the eighth pipeline (111) is in communication with the fourth pipeline (107), and the fourth valve (116) is arranged on the eighth pipeline (111).

2. The device according to claim 1, characterized in that The device also includes: a ninth pipeline (112), a fifth valve (117) and a sixth valve (118); The fifth valve (117) is arranged on the ninth pipeline (112), and the sixth valve (118) is arranged on the fourth pipeline (107); One end of the ninth pipeline (112) is in communication with the third pipeline (106), and the other end of the ninth pipeline (112) is in communication with the fourth pipeline (107). The connection point between the ninth pipeline (112) and the third pipeline (106) is located between the first valve (113) and the first pressure regulator air outlet (122), and the connection point between the ninth pipeline (112) and the fourth pipeline (107) is located between the sixth valve (118) and the first controller air inlet (124).

3. The device according to claim 2, characterized in that The first valve (113), the second valve (114), the third valve (115), the fourth valve (116), the fifth valve (117) and the sixth valve (118) are respectively ball valves.

4. The device according to any one of claims 1 to 3, characterized in that The pressure pipe filter (102) is a basket filter.

5. The device according to any one of claims 1 to 3, characterized in that: The voltage regulator (101) is a fail-safe normally closed voltage regulator.

6. The device according to any one of claims 1 to 3, characterized in that The controller (103) is a fail-safe normally closed controller.

7. A maintenance method for a pressure regulating device, characterized in that: The voltage regulating device is the voltage regulating device according to claim 1, and the method comprises: When the maintenance frequency of the pressure pipe filter is met, closing the first valve, the second valve and the third valve; Open the fourth valve to exhaust the gas in the third pipeline between the first valve and the air inlet of the pressure pipe filter and the fourth pipeline between the air outlet of the pressure pipe filter and the sixth valve; The pressure pipe filter is maintained.

8. The method according to claim 7, characterized in that The voltage regulating device also includes: a ninth pipeline (112), a fifth valve (117) and a sixth valve (118); The fifth valve (117) is arranged on the ninth pipeline (112), and the sixth valve (118) is arranged on the fourth pipeline (107); One end of the ninth pipeline (112) is in communication with the third pipeline (106), and the other end of the ninth pipeline (112) is in communication with the fourth pipeline (107); a connection point between the ninth pipeline (112) and the third pipeline (106) is located between the first valve (113) and the first pressure regulator air outlet (122); and a connection point between the ninth pipeline (112) and the fourth pipeline (107) is located between the sixth valve (118) and the first controller air inlet (124); Before maintaining the pressure pipe filter, the method further includes: The fifth valve is opened, and the sixth valve is closed.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: When the maintenance frequency of the controller is met, closing the first valve, the second valve, and the third valve; Opening the fourth valve to exhaust the gas in the fourth pipeline, the fifth pipeline between the gas inlet of the second pilot and the second valve, and the sixth pipeline between the gas outlet of the pilot and the third valve; Perform maintenance on the pilot.

10. The method according to claim 9, characterized in that The maintenance frequency of the pressure pipe filter is 7 to 10 days / time, and the maintenance frequency of the controller is less than the maintenance frequency of the pressure pipe filter.

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