Pressure regulating device and method for maintaining it

Abstract

The present disclosure 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 commander. The pressure regulating device comprises a first pipeline and a second pipeline connected with the pressure regulator, a third pipeline connected with the pressure regulator at one end and connected with the pressure guide pipe filter at the other end, and a first valve arranged on the third pipeline. A fourth pipeline connected with the pressure guide pipe filter at one end and connected with the commander at the other end. A fifth pipeline connected with the commander at one end and connected with the second pipeline at the other end, and a second valve arranged on the fifth pipeline. A sixth pipeline connected with the commander at one end and connected with the pressure regulator at the other end, and a third valve arranged on the sixth pipeline. A seventh pipeline connected with the pressure regulator at one end and connected with the second pipeline at the other end. An eighth pipeline connected with the fourth pipeline, and a fourth valve arranged on the eighth pipeline. The pressure regulating device can effectively reduce the gas loss during maintenance and reduce energy waste.

Description

TECHNICAL FIELD

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

[0002] The pressure regulating device is a device for controlling the flow of gas in a pipeline. The pressure regulating device comprises a pressure regulator, a pilot, 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 of 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 pilot is arranged at the critical point of the third pipeline and the fourth pipeline, and the pilot 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 delivery process, the third pipeline delivers part of the upstream gas to the pilot, the fourth pipeline delivers part of the downstream gas to the pilot, the pilot controls the pilot opening degree 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 pressure regulator valve opening degree based on the pressure of the gas provided by the fifth pipeline. Finally, the upstream gas in the first pipeline enters the second pipeline as downstream gas through the pressure regulator.

[0003] In related art, the filter screen in the pilot filters the gas delivered to the pilot, and the impurities in the gas are left in the filter screen. In order to prevent the filter screen from being blocked by impurities, the impurities in the filter screen of the pilot need to be cleaned frequently. In related art, based on the content of impurities in the gas, the cleaning frequency of the filter screen of the pilot is 1-3 times / week.

[0004] When cleaning the filter screen of the pilot, the gas delivery of the first pipeline and the second pipeline is stopped, and the gas in the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the sixth pipeline is emptied before cleaning the filter screen of the pilot. Since the cleaning frequency of the filter screen of the pilot is high, emptying the gas in the above pipelines each time will cause a large waste of energy. In addition, since the filter screen of the pilot is cleaned, the rubber ring of the filter and other components are replaced, and the loss of the rubber ring and other components makes the cleaning cost high. SUMMARY

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

[0006] In one aspect, a pressure regulating device is provided, which comprises:

[0007] pressure regulator, pressure guide pipe filter, commander, first pipe, second pipe, third pipe, fourth pipe, fifth pipe, sixth pipe, seventh pipe, eighth pipe, first valve, second valve, third valve, fourth valve;

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

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

[0010] Optionally, the device further comprises:

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

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

[0013] One end of the ninth pipe is in communication with the third pipe, and the other end of the ninth pipe is in communication with the fourth pipe, and the connection point of the ninth pipe with the third pipe is located between the first valve and the first pressure regulator air outlet, and the connection point of the ninth pipe with the fourth pipe is located between the sixth valve and the first commander air 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 guide pipe filter is a basket filter.

[0016] Optionally, the pressure regulator is a fail-closed pressure regulator.

[0017] Optionally, the commander is a fail-closed commander.

[0018] In another aspect, a maintenance method of a pressure regulating device is provided, the pressure regulating device being the pressure regulating device as described above, the method comprising:

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

[0020] opening the fourth valve to empty the gas in the third pipe between the first valve and the air inlet of the pilot pressure pipe filter and the fourth pipe between the air outlet of the pilot pressure pipe filter and the sixth valve;

[0021] maintaining the pilot pressure pipe filter.

[0022] Optionally, the pressure regulating device further comprises:

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

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

[0025] one end of the ninth pipe is in communication with the third pipe, and the other end of the ninth pipe is in communication with the fourth pipe, the connection point of the ninth pipe and the third pipe is between the first valve and the air outlet of the first pressure regulator, and the connection point of the ninth pipe and the fourth pipe is between the sixth valve and the air inlet of the first commander;

[0026] before the pilot pressure pipe filter is maintained, the method further comprises:

[0027] opening the fifth valve and closing the sixth valve.

[0028] Optionally, the method further comprises:

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

[0030] opening the fourth valve to empty the gas in the fourth pipe, the fifth pipe between the air inlet of the second commander and the second valve, and the sixth pipe between the air outlet of the commander and the third valve;

[0031] maintaining the commander.

[0032] Optionally, the maintenance frequency of the pressure guide pipe filter is 7-10 days / time, and the maintenance frequency of the commander is less than the maintenance frequency of the pressure guide pipe filter.

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

[0034] In the embodiments of the present disclosure, the pressure regulating device has a pressure guide pipe filter, which preliminarily filters the upstream gas, and then a commander filters the upstream gas again, so that the number of impurities remaining in the filter screen of the commander is reduced, thereby reducing the maintenance frequency of the commander. Since the filter screen rubber ring and other components of the commander need to be replaced during maintenance, but the pressure guide pipe filter does not need to be replaced, by reducing the maintenance frequency of the commander, the loss of the filter screen rubber ring and other components is reduced, thereby reducing the maintenance cost. Meanwhile, the first valve, the second valve, the third valve and the fourth valve are arranged, during maintenance of the pressure guide pipe filter and the commander, the first valve, the second valve and the third valve are closed, and the fourth valve is opened, so that only the gas in the fourth pipeline, the fifth pipeline between the second commander gas inlet and the second valve, and the sixth pipeline between the commander gas outlet and the third valve needs to be discharged through the eighth pipeline, compared with the related art, less air needs to be discharged, thereby reducing energy waste during maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic diagram of a pressure regulating device provided by the embodiments of the present disclosure;

[0037] Figure 2 is a structural schematic diagram of a commander provided by the embodiments of the present disclosure;

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

[0039] Figure 4 is a maintenance method flow chart of another pressure regulating device provided by the embodiments of the present disclosure.

[0040] The reference signs are as follows:

[0041] 101: pressure regulator; 102: pressure guide pipe filter; 103: commander; 104: first pipe; 105: second pipe; 106: third pipe; 107: fourth pipe; 108: fifth pipe; 109: sixth pipe; 110: seventh pipe; 111: eighth pipe; 112: ninth pipe; 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 commander air inlet; 125: second commander air inlet; 126: commander air outlet.

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

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

[0044] Figure 1 is a structural schematic diagram of a pressure regulator commander device provided by an embodiment of the present disclosure. Referring to Figure 1 , the device comprises a pressure regulator 101, a pressure guide pipe filter 102, a commander 103, a first pipe 104, a second pipe 105, a third pipe 106, a fourth pipe 107, a fifth pipe 108, a sixth pipe 109, a seventh pipe 110, an eighth pipe 111, a first valve 113, a second valve 114, a third valve 115, a fourth valve 116, a fifth valve 117, a sixth valve 118, 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, a second pressure regulator air outlet 123, a first commander air inlet 124, a second commander air inlet 125, and a commander air outlet 126.

[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 commander 103 has a first commander air inlet 124, a second commander air inlet 125, and a commander air outlet 126; the first pipeline 104 is in communication with the first pressure regulator air inlet 119, and the second pipeline 105 is in communication with the second pressure regulator air outlet 123; one end of the third pipeline 106 is in communication with the first pressure regulator air outlet 122, and the other end of the third pipeline 106 is in communication with the air inlet of the pressure guide 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 guide filter 102, and the other end of the fourth pipeline 107 is in communication with the first commander air inlet 124; one end of the fifth pipeline 108 is in communication with the second commander air inlet 125, and the other end of the fifth 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 commander air outlet 126, and the other end of the sixth pipeline 109 is in communication 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 in communication with the second pipeline 105, and the other end of the seventh pipeline 110 is in communication with the third pressure regulator air inlet 121; the eighth pipeline 111 is in communication with the fourth pipeline 107, and the fourth valve 116 is arranged on the eighth pipeline 111.

[0046] In the embodiment of the present disclosure, the pressure regulating device has a pressure guide filter, which preliminarily filters the upstream gas, and then the commander filters the upstream gas again, so that the number of impurities remaining in the filter screen of the commander is reduced, thereby reducing the maintenance frequency of the commander. Since the filter screen rubber ring and other components of the commander need to be replaced during maintenance, but the pressure guide filter does not need to be replaced, by reducing the maintenance frequency of the commander, the loss of the filter screen rubber ring and other components is reduced, thereby reducing the maintenance cost. At the same time, the first valve, the second valve, the third valve, and the fourth valve are arranged, and during maintenance of the pressure guide filter and the commander, the first valve, the second valve, and the third valve are closed, and the fourth valve is opened, so that the gas in the fifth pipeline between the fourth pipeline, the second commander air inlet, and the second valve, and the sixth pipeline between the commander air outlet and the third valve can be discharged through the eighth pipeline, thereby reducing the energy waste during maintenance.

[0047] In the embodiment of the present disclosure, the pressure regulator 101 is a failure normally closed pressure regulator.

[0048] In the embodiments of the present disclosure, the pressure regulator 101 is of the type described above, and when the director 103 is maintained, the pressure regulator 101 is automatically closed when the director 103 does not supply the upstream gas to the pressure regulator 101, so that the downstream gas pressure is not out of control when the director 103 is maintained.

[0049] In the embodiments of the present disclosure, the pressure guide pipe filter 102 is a basket filter.

[0050] The pressure guide pipe filter 102 is of the type described above, which can effectively filter the impurities in the gas, so that the gas still contains a large amount of impurities after passing through the pressure guide pipe filter 102, thereby effectively reducing the maintenance frequency of the director 103.

[0051] In the embodiments of the present disclosure, the director 103 is a fail-closed director.

[0052] In the embodiments of the present disclosure, the director 103 is of the type described above, and when the gas delivery is stopped, the director 103 is automatically closed, thereby facilitating the gas control.

[0053] In the embodiments 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 embodiments 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, which facilitates the gas control.

[0055] In other embodiments, the pressure regulator 101, the pressure guide pipe filter 102, the director 103 and the valves can also be of other types, and the present disclosure does not limit this.

[0056] In the embodiment of the present disclosure, the first pipe 104 is used to deliver the upstream gas to the inside of the pressure regulator 101, and a part of the upstream gas delivered by the first pipe 104 to the inside of the pressure regulator 101 is delivered to the third pipe 106 through the first pressure regulator outlet 122, and another part of the upstream gas delivered by the first pipe 104 to the inside of the pressure regulator 101 is delivered to the second pipe 105 through the second pressure regulator outlet 123 to become the downstream gas. The third pipe 106 is used to deliver the upstream gas to the pressure guide filter 102 for filtering, and then the upstream gas is delivered to the pilot 103 through the fourth pipe 107, the fifth pipe 108 is used to deliver the downstream gas to the inside of the pilot 103, and the pilot controls the upstream gas to be delivered to the inside of the pressure regulator 101 through the sixth pipe 109 based on the pressure difference of the gas in the fourth pipe 107 and the fifth pipe 108, the seventh pipe 110 is used to deliver the downstream gas to the inside of the pressure regulator 101, the pressure regulator controls the upstream gas delivered by the first pipe 104 to the second pipe 105 based on the pressure of the upstream gas delivered by the sixth pipe 109 and the downstream gas delivered by the seventh pipe 110, and the eighth pipe 111 is used to exhaust the gas in the pipe.

[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 the open state, and the fourth valve 116 is in the closed state.

[0058] In the embodiment of the present disclosure, when the pilot is maintained, the first valve 113, the second valve 114 and the third valve 115 are in the closed state, and the fourth valve 116 is in the open state, and the gas in the pipe connected with the pilot 103 is exhausted through the eighth pipe 111 to facilitate the maintenance of the pilot 103.

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

[0060] Therefore, it can be seen that by setting the eighth pipe 111 and the fourth valve 116, the functions of excluding air during the maintenance of the pilot 103 and the pressure guide filter 102 can be realized at the same time.

[0061] In the embodiment of the present disclosure, when the gas is delivered as described above, the upstream gas delivered into the commander 103 is located in a different cavity in the commander 103 from the downstream gas delivered into the commander 103, and the commander 103 controls the flow of the upstream gas delivered into the pressure regulator 101 by the sixth pipeline 109 based on the pressure of the upstream gas and the downstream gas, thereby controlling the pressure of the upstream gas delivered into the pressure regulator 101.

[0062] In the embodiment of the present disclosure, when the gas is delivered as described above, the upstream gas delivered into the pressure regulator 101 by the first pipeline 104 is located in the same cavity of the pressure regulator 101 as the upstream gas output by the third pipeline 106. The upstream gas delivered into the pressure regulator 101 by the commander 103 is located in a different cavity of the pressure regulator 101 from the upstream gas delivered into the pressure regulator 101 by the first pipeline 104. The upstream gas in the pressure regulator 101 is located in a different cavity of the pressure regulator 101 from the downstream gas delivered into the pressure regulator 101 by the seventh pipeline 110. The pressure regulator 101 controls the opening degree of the valve of the pressure regulator 101 based on the pressure of the upstream gas delivered into the pressure regulator 101 by the commander 103 and the pressure of the downstream gas delivered into the pressure regulator 101 by the seventh pipeline 110, thereby controlling the flow of the gas delivered into the second pipeline 105 by the first pipeline 104, and thereby controlling the pressure of the downstream gas.

[0063] Figure 2 A structural schematic diagram of a pressure regulator provided in the embodiment of the present disclosure is shown in FIG. 2. Figure 2 The pressure regulator includes a pressure regulator body 201, a first cavity 202, a second cavity 203, a transmission rod 204, a first partition plate 205, a second partition plate 206, a spring 207, and a connecting rod 208.

[0064] The first cavity 202 is in communication with the first pressure regulator gas inlet 119, the first pressure regulator gas outlet 122, and the second pressure regulator gas outlet 123. The second pressure regulator gas outlet 123 is separated from the first cavity 202 by the first partition plate 205.

[0065] The first partition plate 205 is connected to the spring 207 through the connecting rod 208. The spring 207 is connected to one end of the transmission rod 204. The other end of the transmission rod 204 is connected to the second partition plate 206. The second partition plate 206 is located in the second cavity 203 and separates the second cavity 203 into a first part 209 and a second part 210. The first part 209 is in communication with the second pressure regulator gas inlet 120. The second part 210 is in communication with the third pressure regulator gas inlet 121.

[0066] In the embodiment of the present disclosure, the pressure regulator with the above structure is used to form a commander pressure regulator device, which is more convenient to control the downstream gas pressure. When the gas is delivered, the upstream gas enters the first cavity, and is delivered to the commander through the first pressure regulator gas outlet in communication with the first cavity. The commander delivers the upstream gas to the first part of the second cavity of the pressure regulator through the second pressure regulator gas inlet according to the downstream gas pressure. The downstream gas is delivered to the second part of the second cavity through the third pressure regulator gas inlet. The first part and the second part have a second partition plate therebetween. The pressure difference between the first part and the second part is used to control the movement of the transmission rod, so as to control the movement of the first partition plate. When the first partition plate moves upward, the opening degree of the pressure regulator valve becomes larger. When the first partition plate moves downward, the opening degree of the pressure regulator valve becomes smaller.

[0067] In the embodiment of the present disclosure, the commander 103 and the pressure regulator 101 are used to control the gas flow rate delivered from the first pipeline 104 to the second pipeline 105. The pressure of the upstream gas delivered by the fourth pipeline 107 of the commander 103 and the pressure of the downstream gas delivered by the fifth pipeline 108 are used to control the flow rate of the upstream gas delivered by the sixth pipeline 109 to the pressure regulator 101. The pressure regulator 101 controls the gas flow rate delivered from the first pipeline 104 to the second pipeline 105 based on the pressure of the upstream gas delivered by the sixth pipeline 109 and the pressure of the downstream gas delivered by the seventh pipeline 110. If the pressure of the downstream gas decreases, the pressure of the downstream gas delivered by the fifth pipeline 108 to the inside of the commander 103 decreases, so that the opening degree of the valve in the commander 103 becomes larger, and the gas flow rate of the upstream gas delivered by the sixth pipeline 109 to the pressure regulator 101 becomes larger. The pressure of the upstream gas delivered by the commander 103 to the inside of the pressure regulator 101 becomes larger, so that the opening degree of the valve in the pressure regulator 101 becomes larger, and the gas flow rate of the gas delivered from the first pipeline 104 to the second pipeline 105 through the valve becomes larger, so as to increase the downstream gas flow rate and increase the downstream gas pressure.

[0068] If the pressure of the downstream gas increases, according to the same principle, the opening degree of the valve in the commander 103 becomes smaller, the upstream gas flow rate delivered by the commander 103 to the inside of the pressure regulator 101 becomes smaller, so that the pressure of the upstream gas delivered by the commander 103 to the inside of the pressure regulator 101 becomes smaller, so that the opening degree of the valve in the pressure regulator 101 becomes smaller, and the gas flow rate of the gas delivered from the first pipeline 104 to the second pipeline 105 becomes smaller, so as to decrease the downstream gas pressure. Through the above principle, the pressure regulator device controls the downstream gas pressure to be stable.

[0069] The above is the principle of automatic operation of the pressure regulating device. In actual use, the valve opening degree of the commander 103 can be manually controlled. For example, the commander 103 has a control screw, by which the gas flow of the upstream gas delivered by the commander 103 to the pressure regulator 101 can be manually controlled. When the control screw in the commander is tightened, the valve opening degree of the commander 103 will increase, so that the upstream gas pressure delivered to the inside of the pressure regulator 101 increases, and the valve opening degree of the pressure regulator 101 also increases, so that the gas flow delivered to the eighth pipeline 111 increases, so as to increase the downstream gas pressure.

[0070] Correspondingly, when the control screw of the commander 103 is loosened, the valve opening degree of the commander 103 decreases, so that the upstream gas pressure delivered to the inside of the pressure regulator 101 decreases, and the valve opening degree of the pressure regulator 101 decreases, so as to reduce the gas flow delivered by the first pipeline 104 to the eighth pipeline 111, so as to reduce the downstream gas pressure.

[0071] Again referring to Figure 1 In the embodiments of the present disclosure, the pressure regulating device further comprises a ninth pipeline 112, a fifth valve 117 and a sixth valve 118;

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

[0073] 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 of the ninth pipeline 112 and the third pipeline 106 is located between the first valve 113 and the first pressure regulator gas outlet 122, and the connection point of the ninth pipeline 112 and the fourth pipeline 107 is located between the sixth valve 118 and the first commander gas 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 arranged in the pressure regulating device, when the pressure regulating pipeline filter 102 is maintained, the upstream gas can be transported to the commander 103 through the ninth pipeline 112, so that the downstream gas pressure can still be controlled during the maintenance of the pressure regulating pipeline filter 102. When the gas is transported, the multiple pipelines are transported at the same time, and each pipeline is provided with the pressure regulating device as described above. If one of the pressure regulating devices is maintained and the gas transportation of the pipeline is stopped, the gas amount in the other pipelines will increase, which is easy to cause the filter in the other pipelines to be blocked. The structure described above is arranged in the pressure regulating device, so that the filter can be prevented from being blocked. In addition, after the sixth valve 118 is arranged, when the pressure regulating pipeline filter 102 is maintained, the gas in the third pipeline 106 between the first valve 113 and the gas inlet of the pressure regulating pipeline filter 102 and the fourth pipeline 107 between the gas outlet of the pressure regulating pipeline filter 102 and the sixth valve 118 only needs to be emptied, so that the gas loss is further reduced. In combination with the pressure regulating pipeline filter 102, the maintenance frequency of the commander 103 can be reduced, so that the gas loss during the maintenance is greatly reduced.

[0075] It is worth noting that after the ninth pipeline 112, the fifth valve 117 and the sixth valve 118 are arranged, 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 regulating pipeline filter is maintained, the fifth valve 117 is in an open state and the sixth valve 118 is in a closed state. When the commander is maintained, the fifth valve 117 is in a closed state and the sixth valve 118 is in an open state.

[0076] In the embodiment of the present disclosure, the maintenance frequency of the commander 103 is 3-4 months / once.

[0077] Exemplarily, the maintenance frequency of the commander 103 is 3 months / once.

[0078] In the embodiment of the present disclosure, the maintenance frequency of the pressure regulating pipeline filter 102 is 7-10 days / once.

[0079] Exemplarily, the maintenance frequency of the pressure regulating pipeline filter 102 is 7 days / once.

[0080] In the embodiment of the present disclosure, according to the case of simultaneously conveying gas in 9 first pipes in the related art, when the upstream gas pressure is 6Mpa, the filter screen in the pilot in each pipe needs to be cleaned, and about 135 cubic meters of gas needs to be vented. According to the cleaning of the pilot filter screen once a week, and the increased frequency in special period, about 220 times of disassembly and inspection are needed in a year. After the pressure regulating device in the present scheme is used, about 29,000 cubic meters of natural gas can be effectively saved every year. At the same time, due to the reduction of the cleaning frequency of the pilot, the consumption of filter rubber rings and other materials is reduced, and the material consumption is greatly saved. And the maintenance and disassembly time can be shortened from 1 hour to 10 minutes, greatly reducing the maintenance time and the labor intensity of the employees.

[0081] Figure 3 A maintenance method flow chart of the pressure regulating device provided in the embodiment of the present disclosure is provided. Referring to Figure 3 , the method steps include:

[0082] S31, when the maintenance frequency of the pilot filter is met, the first valve, the second valve and the third valve are closed.

[0083] S32, the fourth valve is opened, and the gas in the third pipe between the first valve and the gas inlet of the pilot filter and the fourth pipe between the gas outlet of the pilot filter and the sixth valve is vented.

[0084] S33, the pilot filter is maintained.

[0085] In the embodiment of the present disclosure, when the pilot filter is maintained, the first valve, the second valve and the third valve are closed, and the fourth valve is opened, and only the gas in the fifth pipe between the second pilot inlet and the second valve and the sixth pipe between the pilot outlet and the third valve needs to be vented through the eighth pipe, so as to reduce the energy waste during maintenance.

[0086] Figure 4 Another maintenance method flow chart of the pilot pressure regulator provided in the embodiment of the present disclosure is provided. Referring to Figure 4 , the method steps include:

[0087] S41, when the maintenance frequency of the pilot filter is met, the first valve, the second valve and the third valve are closed.

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

[0089] The first valve, the second valve and the third valve are closed in turn, and the gas conveying is stopped.

[0090] After the valves are closed in sequence, the upstream gas and downstream gas still exist in the pipeline, but since the fifth pipeline does not transport the downstream gas to the pilot, the pilot valve is closed to stop the transportation of the upstream gas to the pressure regulator, and the pressure regulator also closes the valve to stop the transportation of the gas in the first pipeline to the second pipeline since the pressure regulator does not receive the upstream gas transported by the pilot.

[0091] For example, the maintenance frequency of the pressure guide pipe filter is 7 days / once.

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

[0093] In the embodiments of the present disclosure, the pressure guide pipe filter is arranged to reduce the maintenance frequency of the pilot, and the maintenance frequency of the pilot is reduced, so that the gas loss and the loss of the rubber ring and other components during the maintenance of the pilot are reduced, and the maintenance cost is reduced.

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

[0095] The fifth valve is opened, and the first valve and the sixth valve are closed in sequence.

[0096] First, the fifth valve is opened, the ninth pipeline is connected, the upstream gas is transported to the pilot through the ninth pipeline and the pressure guide pipe filter, then the first valve and the sixth valve are closed to cut off the pressure guide pipe filter, and the upstream gas is transported to the pilot through the ninth pipeline.

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

[0098] S42, open the fourth valve to empty the gas in the third pipeline between the first valve and the gas inlet of the pressure guide pipe filter and the fourth pipeline between the gas outlet of the pressure guide pipe filter and the sixth valve.

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

[0100] The fourth valve is opened to empty the gas in the third pipeline between the first valve and the gas inlet of the pressure guide pipe filter and the fourth pipeline between the gas outlet of the pressure guide pipe filter and the sixth valve.

[0101] S43, maintain the pressure guide 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] First, the impurities in the pressure guide pipe filter are cleaned.

[0104] Second step, after the maintenance of the pressure guide pipe filter is completed, the fourth valve is closed, and the first valve, the second valve and the third valve are opened in turn, and the gas continues to be transported.

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

[0106] First step, impurities in the pressure guide pipe filter are cleaned.

[0107] Second step, after the maintenance of the pressure guide pipe filter is completed, the fourth valve is closed, and the first valve and the sixth valve are opened in turn, and then the fifth valve is closed, and the gas continues to be transported.

[0108] S44, when the maintenance frequency of the commander is met, the first valve, the second valve and the third valve are closed.

[0109] In an example, step S44 includes:

[0110] The first valve, the second valve and the third valve are closed in turn, and the gas transportation is stopped.

[0111] Exemplarily, the maintenance frequency of the commander is 3-4 months / time.

[0112] For example, the maintenance frequency of the commander is 3 months / time.

[0113] In the embodiments of the present disclosure, the commander is maintained by using the above maintenance frequency, which can reduce the gas loss and maintenance cost of maintenance, and can ensure that the commander is not blocked.

[0114] S45, the fourth valve is opened, and the gas in the fifth pipeline between the second commander gas inlet and the second valve and the sixth pipeline between the commander gas outlet and the third valve is exhausted.

[0115] The fourth valve is opened, and the gas in the pipeline connected with the commander is exhausted under the action of pressure.

[0116] S46, the commander is maintained.

[0117] In an example, step S46 includes:

[0118] First step, impurities in the commander filter screen are cleaned, and the filter screen rubber ring and other components are replaced.

[0119] Second step, the fourth valve is closed, and the first valve, the second valve and the third valve are opened in turn, and the gas continues to be transported.

[0120] The above merely describes optional embodiments of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A pressure regulating device, characterized by The device comprises: a pressure regulator (101), a pressure guide pipe filter (102), a commander (103), a first pipe (104), a second pipe (105), a third pipe (106), a fourth pipe (107), a fifth pipe (108), a sixth pipe (109), a seventh pipe (110), an eighth pipe (111), a first valve (113), a second valve (114), a third valve (115), 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 commander (103) has a first commander air inlet (124), a second commander air inlet (125), and a commander air outlet (126); the first pipe (104) is in communication with the first pressure regulator air inlet (119), and the second pipe (105) is in communication with the second pressure regulator air outlet (123); one end of the third pipe (106) is in communication with the first pressure regulator air outlet (122), and the other end of the third pipe (106) is in communication with the air inlet of the pressure guide pipe filter (102), and the first valve (113) is arranged on the third pipe (106); one end of the fourth pipe (107) is in communication with the air outlet of the pressure guide pipe filter (102), and the other end of the fourth pipe (107) is in communication with the first commander air inlet (124); one end of the fifth pipe (108) is in communication with the second commander air inlet (125), and the other end of the fifth pipe (108) is in communication with the second pipe (105), and the second valve (114) is arranged on the fifth pipe (108); one end of the sixth pipe (109) is in communication with the commander air outlet (126), and the other end of the sixth pipe (109) is in communication with the second pressure regulator air inlet (120), and the third valve (115) is arranged on the sixth pipe (109); one end of the seventh pipe (110) is in communication with the second pipe (105), and the other end of the seventh pipe (110) is in communication with the third pressure regulator air inlet (121); the eighth pipe (111) is in communication with the fourth pipe (107), and the fourth valve (116) is arranged on the eighth pipe (111); the device further comprises a sixth valve (118), which is arranged on the fourth pipe (107).

2. The apparatus of claim 1, wherein, The device further comprises: a ninth pipe (112), a fifth valve (117); the fifth valve (117) is arranged on the ninth pipe (112); One end of the ninth pipeline (112) is communicated with the third pipeline (106), and the other end of the ninth pipeline (112) is communicated with the fourth pipeline (107), the connection point of the ninth pipeline (112) and the third pipeline (106) is located between the first valve (113) and the first pressure regulator gas outlet (122), and the connection point of the ninth pipeline (112) and the fourth pipeline (107) is located between the sixth valve (118) and the first commander gas inlet (124).

3. The apparatus of claim 2, wherein, 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.

4. The device of any one of claims 1 to 3, wherein, The pressure guide pipe filter (102) is a basket filter.

5. The device of any one of claims 1 to 3, wherein, The pressure regulator (101) is a failure normally closed pressure regulator.

6. The device of any one of claims 1 to 3, wherein, The commander (103) is a failure normally closed commander.

7. A method of maintaining a pressure regulating device, characterized by, The pressure regulating device is the pressure regulating device according to claim 1, and the method comprises: When the maintenance frequency of the pressure guide pipe filter is met, the first valve, the second valve and the third valve are closed; The fourth valve is opened, and the gas in the third pipeline between the first valve and the gas inlet of the pressure guide pipe filter and the fourth pipeline between the gas outlet of the pressure guide pipe filter and the sixth valve is exhausted; The pressure guide pipe filter is maintained.

8. The method of claim 7, wherein, The pressure regulating device further comprises: a ninth pipeline (112) and a fifth valve (117); The fifth valve (117) is arranged on the ninth pipeline (112); One end of the ninth pipeline (112) is communicated with the third pipeline (106), and the other end of the ninth pipeline (112) is communicated with the fourth pipeline (107), the connection point of the ninth pipeline (112) and the third pipeline (106) is located between the first valve (113) and the first pressure regulator gas outlet (122), and the connection point of the ninth pipeline (112) and the fourth pipeline (107) is located between the sixth valve (118) and the first commander gas inlet (124); Before the pressure guide pipe filter is maintained, the method further comprises: 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 commander is met, the first valve, the second valve and the third valve are closed; The fourth valve is opened, and the gas in the fourth pipeline, the fifth pipeline between the second commander gas inlet and the second valve and the sixth pipeline between the commander gas outlet and the third valve is exhausted; The commander is maintained.

10. The method of claim 9, wherein, The maintenance frequency of the pressure guide pipe filter is 7-10 days / time, and the maintenance frequency of the commander is less than the maintenance frequency of the pressure guide pipe filter.

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