Air pressure control system and test system thereof

Abstract

The present invention discloses an air pressure control system and a test system thereof. The air pressure control system is composed of an air-controlled stop valve, a boosting module, a low-pressure test module, and at least one high-pressure test module. The air pressure control system includes a nitrogen inlet, which is connected to a low-pressure test port through a first pipeline. In the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with an air-controlled stop valve and a low-pressure test module; the first inlet of the boosting module is connected to a compressed air inlet, a first branch pipeline is provided between the air-controlled stop valve and the low-pressure test module, the first branch pipeline is connected to the second inlet of the boosting module, and the outlet of the boosting module is connected to the high-pressure test port through at least one second pipeline, and each second pipeline corresponds to a high-pressure test port, and each second pipeline is provided with a high-pressure test module. The air pressure control system provided by the present invention can measure multiple pressure levels, has high testing efficiency, and has the advantages of reliable function and long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure test control, and in particular relates to an air pressure control system and a test system thereof. Background Art

[0002] With the advancement of deepwater oil and gas field exploitation technology, underwater production system development models have been widely adopted. Each unit and gas-related device in the underwater production system often requires airtightness testing to ensure good airtightness and prevent gas leaks during the production process.

[0003] Existing airtightness performance testing equipment can only output gas of a specific pressure level to act on related devices to achieve airtightness performance testing; that is, in the existing solution, the airtightness performance testing equipment can only output gas of one pressure level and can only test one pressure level, which will lead to low test efficiency and seriously affect test efficiency.

[0004] Therefore, it is urgent to design a gas pressure control system to solve the above-mentioned problems. Summary of the Invention

[0005] In order to solve the technical problem mentioned in the background technology that the existing testing equipment can only output gas of one pressure level and can only test one pressure level, which seriously affects the testing efficiency, an air pressure control system is provided to solve the problem of outputting gas of different pressures for testing.

[0006] To achieve the above objectives, the specific technical solutions of the air pressure control system of the present invention are as follows:

[0007] A pneumatic pressure control system, comprising a pneumatic shutoff valve, a pressurizing module, a low-pressure test module, and at least one high-pressure test module, including a nitrogen inlet connected to a low-pressure test port via a first pipeline. The first pipeline is sequentially provided with a pneumatic shutoff valve and a low-pressure test module in a direction from the nitrogen inlet to the low-pressure test port.

[0008] The first inlet of the boosting module is connected to the compressed air inlet, a first branch pipe is provided between the air-controlled shut-off valve and the low-pressure test module, the first branch pipe is connected to the second inlet of the boosting module, and the outlet of the boosting module is connected to the high-pressure test port via at least one second pipe, and each second pipe corresponds to a high-pressure test port, and each second pipe is provided with a high-pressure test module;

[0009] The boost module includes one boost unit or n boost units;

[0010] When the number of the boosting unit is one, the first inlet of the boosting unit is connected to the compressed air inlet via a pipeline, the second inlet of the boosting unit is connected to the first branch pipeline, and the outlet of the boosting unit is connected to the high-pressure test port via at least one second pipeline;

[0011] When the number of boosting units is n, where n is a positive integer greater than or equal to 2, the first inlets of all boosting units are connected to the compressed air inlet, the second inlet of the first boosting unit is connected to the first branch pipeline, the outlet of the k-1th boosting unit is connected to the second inlet of the kth boosting unit, and the outlet of the nth boosting unit is connected to the high-pressure test port via at least one second pipeline, wherein k is a positive integer greater than or equal to 2, and k is less than or equal to n;

[0012] The boosting unit includes a pressure regulating valve, a driving solenoid valve, a driving gas switch valve and a boosting pump;

[0013] The inlet of the pressure regulating valve is connected to the compressed air inlet through a pipeline, and the outlet of the pressure regulating valve is connected to the second port of the driving solenoid valve and the driving air switch valve respectively, the first port of the driving air switch valve is connected to the driving solenoid valve, and the third port of the driving air switch valve is connected to the control end of the boosting pump. The nitrogen inlet end of the boosting pump serves as the second inlet of the boosting unit, and the nitrogen outlet end of the boosting pump serves as the outlet of the boosting unit.

[0014] Furthermore, the low-voltage test module includes a first switch module, a first pressure relief module and a first detection module;

[0015] In the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a gas-controlled shut-off valve, a first switch module and a first detection module. A first pressure relief pipeline is provided on the outlet side of the first switch module provided on the first pipeline. The first pressure relief pipeline is connected to the pressure relief port, and the first pressure relief pipeline is provided with a first pressure relief module.

[0016] Furthermore, it includes an automatic state; when in the automatic state, the first switch module includes a fourth pressure regulating valve and a fourth air-controlled stop valve, the first pressure relief module includes an eleventh air-controlled stop valve and a third electrical proportional control valve, and the first detection module includes an eighth pressure transmitter; in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a first air-controlled stop valve, a fourth pressure regulating valve, a fourth air-controlled stop valve and an eighth pressure transmitter, and the eleventh air-controlled stop valve and the third electrical proportional control valve are both provided on the first pressure relief pipeline.

[0017] Furthermore, the high-voltage test module includes a second switch module, a second pressure relief module and a second detection module;

[0018] In the direction from the outlet of the boost module to the high-pressure test port, a second switch module and a second detection module are sequentially arranged on the second pipeline, a second pressure relief pipeline is arranged on the outlet side of the second switch module, the second pressure relief pipeline is connected to the pressure relief port, and a second pressure relief module is arranged on the second pressure relief pipeline.

[0019] Furthermore, when in the automatic state, the second switch module includes a second air-controlled stop valve, the second pressure relief module includes a fifth air-controlled stop valve and a first electrical proportional control valve, and the second detection module includes a second pressure transmitter;

[0020] In the direction from the outlet of the boost module to the high-pressure test port, a second air-controlled stop valve and a second pressure transmitter are sequentially arranged on the second pipeline, and a fifth air-controlled stop valve and a first electrical proportional control valve are arranged on the second pressure relief pipeline.

[0021] Furthermore, the air pressure control system further comprises at least one supplementary detection module, which is arranged on one side of the second pipeline close to the high-pressure test port;

[0022] The supplementary detection module includes a pressure gauge, a pressure transmitter and a gas-controlled stop valve; the pressure gauge and the pressure transmitter are connected to one end of the gas-controlled stop valve, and the other end of the gas-controlled stop valve is connected to the high-pressure test port.

[0023] Furthermore, the air pressure control system further comprises at least one control module and at least one electric proportional valve, each control module comprising a solenoid valve and a bypass ball valve;

[0024] For each control module, the first interface of the bypass ball valve is connected to the compressed air inlet via the solenoid valve, the second interface of the bypass ball valve is connected to the compressed air inlet, and the third interface of the bypass ball valve is connected to an air-controlled stop valve. When the air pressure control system is in the automatic state, the external electrical control system controls the solenoid valve, thereby controlling the opening and closing of the air-controlled stop valve.

[0025] For each electric proportional valve, one end of the electric proportional valve is connected to the compressed air inlet, and the other end is connected to an electric proportional control valve, so that when the air pressure control system is in the automatic state, the external electric control system controls the electric proportional valve, and then controls the opening of the electric proportional control valve.

[0026] A test system includes an air pressure control system and an electrical control system. The electrical control system is electrically connected to the air pressure control system to control the air pressure control system to output nitrogen of different pressure levels when the air pressure control system is in an automatic state.

[0027] The air pressure control system of the present invention has the following advantages:

[0028] The air pressure control system can provide low-pressure gas at the low-pressure test port, and can output high-pressure gas at the high-pressure test port under the action of the booster module. It can accurately control the output pressure of different levels and can measure multiple pressure levels. It has high test efficiency, reliable function and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the flow of the air pressure control system of the present invention;

[0030] Figure 2 Schematic diagram of the electrical structure of the air pressure control system of the present invention;

[0031] Figure 3 This is a flow chart of the test system of the air pressure control system of the present invention.

[0032] Description of the marks in the figure:

[0033] 1. First one-way valve; 2. First pressure regulating valve; 3-13. First solenoid valve; 14-24. Bypass ball valve; 25-27. Electric proportional valve; 28. Second pressure regulating valve; 29. ​​First pressure gauge; 30. Second solenoid valve; 31. First drive gas on / off valve; 32. First filter; 33. Third pressure regulating valve; 34. Second pressure gauge; 35. Third solenoid valve; 36. Second drive gas on / off valve; 37. Second filter; 38. Third pressure gauge; 39. First pressure transmitter; 40. First air control Stop valve; 41, fourth pressure regulating valve; 42, fourth pressure gauge; 43, first safety valve; 44, first booster pump; 45, fifth pressure gauge; 46, second booster pump; 47, second safety valve; 48, second check valve; 49, second pneumatic stop valve; 50, first manual stop valve; 51, third pneumatic stop valve; 52, second manual stop valve; 53, fourth pneumatic stop valve; 54, third manual stop valve; 55, third filter; 56, fifth pneumatic stop valve; 57, first electrical proportional control valve 58. Fourth manual stop valve; 59. Manual stop valve for pressure gauge; 60. Second pressure transmitter; 61. Sixth pneumatic stop valve; 62. Sixth pressure gauge; 63. Third pressure transmitter; 64. Pneumatic stop valve for safety valve; 65. Seventh pneumatic stop valve; 66. Seventh pressure gauge; 67. Fourth pressure transmitter; 68. Third safety valve; 69. Fourth filter; 70. Eighth pneumatic stop valve; 71. Second electrical proportional control valve; 72. Fifth manual stop valve; 73. Eighth pressure gauge; 74 , fifth pressure transmitter; 75, ninth air-controlled stop valve; 76, ninth pressure gauge; 77, sixth pressure transmitter; 78, fourth safety valve; 79, tenth air-controlled stop valve; 80, tenth pressure gauge; 81, seventh pressure transmitter; 82, fifth safety valve; 83, fifth filter; 84, eleventh air-controlled stop valve; 85, third electrical proportional control valve; 86, sixth manual stop valve; 87, eleventh pressure gauge; 88, eighth pressure transmitter; 89, manual-automatic switching button; 90, emergency stop switch. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] Those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0036] Please refer to the attached Figure 1 To the attached Figure 3 The air pressure control system of the present invention is described.

[0037] like Figure 1 As shown, the air pressure control system in the present invention consists of an air-controlled stop valve, a boosting module, a low-pressure test module and at least one high-pressure test module, including a nitrogen inlet, which is connected to the low-pressure test port through a first pipe. In the direction from the nitrogen inlet to the low-pressure test port, the first pipe is sequentially provided with an air-controlled stop valve and a low-pressure test module; the first inlet of the boosting module is connected to the compressed air inlet, and a first branch pipe is provided between the air-controlled stop valve and the low-pressure test module, the first branch pipe is connected to the second inlet of the boosting module, and the outlet of the boosting module is connected to the high-pressure test port through at least one second pipe, and each second pipe corresponds to a high-pressure test port, and each second pipe is provided with a high-pressure test module.

[0038] Preferably, the first gas-controlled shut-off valve is opened, nitrogen is introduced, and the gas pressures of the low-pressure test module and the high-pressure test module gradually increase. When the nitrogen pressure of the low-pressure test module reaches a certain standard, the nitrogen pressure is stabilized, while the nitrogen pressure of the high-pressure test module continues to rise under the action of the booster module. When the nitrogen pressure of the high-pressure test module reaches a certain standard, the high-pressure test module stabilizes the nitrogen pressure. At this time, both the low-pressure test port and the high-pressure test port have outputs, outputting low-pressure nitrogen and high-pressure nitrogen, respectively.

[0039] In this embodiment, the air pressure control system can provide low-pressure gas at the low-pressure test port, can output high-pressure gas at the high-pressure test port under the action of the booster module, can measure multiple pressure levels, and has high measurement efficiency.

[0040] The low-pressure test module includes a first switch module, a first pressure relief module and a first detection module; in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a gas-controlled shut-off valve, a first switch module and a first detection module, and a first pressure relief pipeline is provided on the outlet side of the first switch module provided on the first pipeline. The first pressure relief pipeline is connected to the pressure relief port, and the first pressure relief pipeline is provided with a first pressure relief module.

[0041] As a preferred embodiment, the air pressure control system includes manual state, automatic state, manual state or automatic state. The switching between manual state and automatic state can be completed by the manual-automatic switching button 89, and an emergency stop switch 90 is provided to ensure safety.

[0042] When in manual state, the first switch module includes a fourth pressure regulating valve 41 and a third manual shut-off valve 54, the first pressure relief module includes a sixth manual shut-off valve 86, and the first detection module includes an eleventh pressure gauge 87; in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a first gas-controlled shut-off valve 40, a fourth pressure regulating valve 41, a third manual shut-off valve 54 and an eleventh pressure gauge 87, and the sixth manual shut-off valve 86 is provided on the first pressure relief pipeline.

[0043] When in the automatic state, the first switch module includes the fourth pressure regulating valve 41 and the fourth air-controlled stop valve 53, the first pressure relief module includes the eleventh air-controlled stop valve 84 and the third electrical proportional control valve 85, and the first detection module includes the eighth pressure transmitter 88; in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with the first air-controlled stop valve 40, the fourth pressure regulating valve 41, the fourth air-controlled stop valve 53 and the eighth pressure transmitter 88, and the eleventh air-controlled stop valve 84 and the third electrical proportional control valve 85 are both provided on the first pressure relief pipeline.

[0044] When in manual or automatic state, the first switch module includes a fourth pressure regulating valve 41, a fourth air-controlled stop valve 53 and a third manual stop valve 54, the first pressure relief module includes a sixth manual stop valve 86, an eleventh air-controlled stop valve 84 and a third electrical proportional control valve 85, two first pressure relief pipelines are provided, and the first detection module includes an eleventh pressure gauge 87 and an eighth pressure transmitter 88; in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with the first air-controlled stop valve 40, the fourth pressure regulating valve 41, the fourth air-controlled stop valve 53, the eleventh pressure gauge 87 and the eighth pressure transmitter 88, the sixth manual stop valve 86 is connected in parallel to both ends of the eleventh air-controlled stop valve 84, one of the first pressure relief pipelines is provided with the sixth manual stop valve 86, and the other first pressure relief pipeline is provided with the eleventh air-controlled stop valve 84 and the third electrical proportional control valve 85.

[0045] The pressure gauge is used to visually inform the operator of the real-time pressure, and the pressure transmitter is used to transmit pressure data to the external electrical control system. The pressure regulating valve can be operated manually or automatically.

[0046] In this embodiment, in the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a first air-controlled stop valve 40, a fourth pressure regulating valve 41 and a fourth air-controlled stop valve 53, and a third manual stop valve 54 is connected in parallel at both ends of the fourth air-controlled stop valve 53. One of the first pressure relief pipelines is provided with an eleventh air-controlled stop valve 84 and a third electrical proportional regulating valve 85, and the other first pressure relief pipeline is provided with a sixth manual stop valve 86. An eleventh pressure gauge 87 and an eighth pressure transmitter 88 are provided on the first pipeline near the low-pressure test port.

[0047] In order to facilitate the control of the overall situation and for safety reasons, a second filter 37, a third pressure gauge 38 and a first pressure transmitter 39 are also provided at the nitrogen inlet of the first pipeline, a fourth pressure gauge 42 and a first safety valve 43 are provided between the fourth pressure regulating valve 41 and the fourth air-controlled stop valve 53, and a fifth filter 83 is also provided before the eleventh air-controlled stop valve 84.

[0048] Further, if Figures 1 to 2 As shown, the boosting module includes 1 boosting unit or n boosting units; when the number of the boosting unit is 1, the first inlet of the boosting unit is connected to the compressed air inlet via a pipeline, the second inlet of the boosting unit is connected to the first branch pipeline, and the outlet of the boosting unit is connected to the high-pressure test port via at least one second pipeline; when the number of the boosting units is n, n is a positive integer greater than or equal to 2, then the first inlet of all the boosting units is connected to the compressed air inlet, the second inlet of the 1st boosting unit is connected to the first branch pipeline, the outlet of the k-1th boosting unit is connected to the second inlet of the kth boosting unit, and the outlet of the nth boosting unit is connected to the high-pressure test port via at least one second pipeline, wherein k is a positive integer greater than or equal to 2, and k is less than or equal to n.

[0049] In this embodiment, when n is 2, there are two boosting units. The boosting unit includes a pressure regulating valve, a driving solenoid valve, a driving air switch valve, and a boosting pump. The inlet of the pressure regulating valve is connected to the compressed air inlet via a pipeline, the outlet of the pressure regulating valve is connected to the second ports of the driving solenoid valve and the driving air switch valve, respectively. The first port of the driving air switch valve is connected to the driving solenoid valve, and the third port of the driving air switch valve is connected to the control port of the boosting pump. The nitrogen inlet of the boosting pump serves as the second inlet of the boosting unit, and the nitrogen outlet of the boosting pump serves as the outlet of the boosting unit.

[0050] Specifically, the third pressure-regulating valve 33 is connected to the third solenoid valve 35 and the second driving air switch valve 36 via a pipeline. The third port of the second driving air switch valve 36 is connected to the control end of the first boosting pump 44. The nitrogen inlet of the first boosting pump 44 is connected to the first branch pipeline, and the nitrogen outlet of the first boosting pump 44 is connected to the nitrogen inlet of the second boosting pump 46. The second pressure-regulating valve 28 is connected to the second solenoid valve 30 and the first driving air switch valve 31 via a pipeline. The third port of the second driving air switch valve 36 is connected to the control end of the second boosting pump 46. The nitrogen outlet of the second boosting pump 46 is connected to the second pipeline via a second one-way valve 48. The inlet ends of the third pressure-regulating valve 33 and the second pressure-regulating valve 28 are connected to the first filter 32 and then to the compressed air outlet. To facilitate monitoring, a first pressure gauge 29 and a second pressure gauge 34 are respectively provided on the sides of the second pressure-regulating valve 28 and the third pressure-regulating valve 33, and a fifth pressure gauge 45 is provided at the nitrogen outlet of the first boosting pump 44.

[0051] The high-pressure test module includes a second switch module, a second pressure relief module and a second detection module; in the direction from the outlet of the boost module to the high-pressure test port, the second switch module and the second detection module are sequentially arranged on the second pipeline, and a second pressure relief pipeline is arranged on the outlet side of the second switch module, the second pressure relief pipeline is connected to the pressure relief port, and a second pressure relief module is arranged on the second pressure relief pipeline.

[0052] Further, if Figure 2 As shown, as a preferred embodiment, if the air pressure control system can only be in manual state, the second switch module includes a first manual stop valve 50, the second pressure relief module includes a fourth manual stop valve 58, and the second detection module includes a pressure gauge manual stop valve 59; in the direction from the outlet of the boosting module to the high-pressure test port, the first manual stop valve 50 and the pressure gauge manual stop valve 59 are sequentially arranged on the second pipeline, and the fourth manual stop valve 58 is arranged on the second pressure relief pipeline.

[0053] If the air pressure control system can only be in the automatic state, the second switch module includes a second air-controlled stop valve 49, the second pressure relief module includes a fifth air-controlled stop valve 56 and a first electrical proportional control valve 57, and the second detection module includes a second pressure transmitter 60; in the direction from the outlet of the boosting module to the high-pressure test port, the second air-controlled stop valve 49 and the second pressure transmitter 60 are sequentially arranged on the second pipeline, and the fifth air-controlled stop valve 56 and the first electrical proportional control valve 57 are arranged on the second pressure relief pipeline.

[0054] If the air pressure control system is in manual or automatic mode, the second switch module includes a second air-controlled shut-off valve 49 and a first manual shut-off valve 50, the second pressure relief module includes a fourth manual shut-off valve 58, a fifth air-controlled shut-off valve 56 and a first electrical proportional control valve 57, the number of second pressure relief pipes is two, and the second detection module includes a pressure gauge manual shut-off valve 59 and a second pressure transmitter 60;

[0055] In the direction from the outlet of the boosting module to the high-pressure test port, the second pipeline is sequentially provided with a second air-controlled stop valve 49, a pressure gauge manual stop valve 59 and a second pressure transmitter 60, and the first manual stop valve 50 is connected in parallel to both ends of the second air-controlled stop valve 49. A fourth manual stop valve 58 is provided on one of the second pressure relief pipelines, and a fifth air-controlled stop valve 56 and a first electrical proportional control valve 57 are provided on the other second pressure relief pipeline.

[0056] In this embodiment, a second safety valve 47 is provided on the side of the second one-way valve 48. A second pneumatic shut-off valve 49 is provided on the first second pipeline in the direction from the outlet of the second one-way valve 48 to the high-pressure test port. First manual shut-off valves 50 are connected in parallel at both ends of the second pneumatic shut-off valve 49. A pressure gauge manual shut-off valve 59 and a second pressure transmitter 60 are provided at the corresponding high-pressure test port. One second pressure relief pipeline is provided with a third filter 55, a fifth pneumatic shut-off valve 56, and a first electrical proportional control valve 57. Another second pressure relief pipeline is provided with a fourth manual shut-off valve 58. A second second pipeline in the direction from the outlet of the second one-way valve 48 to the high-pressure test port is provided with a third pneumatic shut-off valve 51. Second manual shut-off valves 52 are connected in parallel at both ends of the third pneumatic shut-off valve 51. An eighth pressure gauge 73 and a fifth pressure transmitter 74 are provided at the corresponding high-pressure test port. One second pressure relief pipeline is provided with a fourth filter 69, an eighth pneumatic shut-off valve 70, and a second electrical proportional control valve 71. Another second pressure relief pipeline is provided with a fifth manual shut-off valve 72.

[0057] The air pressure control system also includes at least one supplementary detection module, which is arranged on one side of the second pipeline close to the high-pressure test port; the supplementary detection module includes a pressure gauge, a pressure transmitter and an air-controlled stop valve; the pressure gauge and the pressure transmitter are connected to one end of the air-controlled stop valve, and the other end of the air-controlled stop valve is connected to the high-pressure test port.

[0058] Specifically, for the first second pipeline, a supplementary detection module includes a sixth pressure gauge 62, a third pressure transmitter 63 and a sixth air-controlled stop valve 61. The sixth air-controlled stop valve 61 is used to control whether the sixth pressure gauge 62 and the third pressure transmitter 63 are connected to the second pipeline. Another supplementary detection module includes a seventh air-controlled stop valve 65, a seventh pressure gauge 66 and a fourth pressure transmitter 67. The seventh air-controlled stop valve 65 is used to control whether the seventh pressure gauge 66 and the fourth pressure transmitter 67 are connected to the second pipeline. For safety reasons, a safety valve air-controlled stop valve 64 is set on the side of the third pressure transmitter 63, and a third safety valve 68 is set on the side of the fourth pressure transmitter 67.

[0059] For the second second pipeline, one supplementary detection module includes a ninth air-controlled shutoff valve 75, a ninth pressure gauge 76, and a sixth pressure transmitter 77. The ninth air-controlled shutoff valve 75 is used to control whether the ninth pressure gauge 76 and the sixth pressure transmitter 77 are connected to the second pipeline. Another supplementary detection module includes a tenth air-controlled shutoff valve 79, a tenth pressure gauge 80, and a seventh pressure transmitter 81. The tenth air-controlled shutoff valve 79 is used to control whether the tenth pressure gauge 80 and the seventh pressure transmitter 81 are connected to the second pipeline. For safety reasons, a fourth safety valve 78 is additionally provided on the side of the sixth pressure transmitter 77, and a fifth safety valve 82 is additionally provided on the side of the seventh pressure transmitter 81. Furthermore, the detection accuracy of the supplementary detection modules on the same second pipeline varies.

[0060] The air pressure control system also includes at least one control module and at least one electric proportional valve. Each control module includes a solenoid valve and a bypass ball valve. In this embodiment, 11 control modules and three electric proportional valves are used as an example: first solenoid valves 3-13, bypass ball valves 14-24, and electric proportional valves 25-27. For safety reasons, the control modules and electric proportional valves must be connected to the compressed air inlet through the first pressure regulating valve 2 and the first check valve 1.

[0061] For each control module, the first interface of the bypass ball valve is connected to the compressed air inlet through the solenoid valve, the second interface of the bypass ball valve is connected to the compressed air inlet, and the third interface of the bypass ball valve is connected to an air-controlled stop valve, so that when the air pressure control system is in the automatic state, the external electrical control system controls the solenoid valve, and then controls the switch of the air-controlled stop valve; in the attached Figure 2 In the system, each gas-controlled stop valve is controlled by a corresponding control module.

[0062] For each electric proportional valve, one end of the electric proportional valve is connected to the compressed air inlet, and the other end is connected to an electric proportional control valve, so that when the air pressure control system is in the automatic state, the external electric control system controls the electric proportional valve, thereby controlling the opening of the electric proportional control valve. Figure 2 In the system, each electric proportional control valve is controlled by a corresponding electric proportional valve.

[0063] Preferably, the compressed air inlet is connected to a 0.7 MPa compressed air source, and the nitrogen inlet is connected to a 15 MPa pressure test medium.

[0064] If the air pressure control system is in manual mode, the first solenoid valve 3-13, bypass ball valves 14-24, and electrical proportional valves 25-27 are inoperative, and all air-controlled shutoff valves except the first air-controlled shutoff valve 40 are closed. The fourth manual shutoff valve 58, the fifth manual shutoff valve 72, and the sixth manual shutoff valve 86 are manually closed. The operator requires three different gas pressure levels (corresponding to the three test ports). The operator directly observes the pressure gauges on the manual shutoff valve 59, the eighth pressure gauge 73, and the eleventh pressure gauge 87. If none of these meet the required standards, the operator opens the first air-controlled shutoff valve 40, the first manual shutoff valve 50, the second manual shutoff valve 52, and the third manual shutoff valve 54, and fills nitrogen. Nitrogen is present in all three lines. After the pressure gauges on the manual shutoff valve 59, the eighth pressure gauge 73, and the third pressure gauge 38 are generally consistent, the operator proceeds with subsequent operations.

[0065] For the low-pressure test port, when the value on the eleventh pressure gauge 87 reaches the specified value, the third manual shut-off valve 54 is manually closed to maintain pressure and conduct a low-pressure test. After the test, the sixth manual shut-off valve 86 is manually opened to release pressure. For the medium-pressure test port (in this embodiment, the middle high-pressure test port), the third pressure-regulating valve 33 and the second drive air on / off valve 36 are first opened to operate the first booster pump 44. At this point, if the value on the eighth pressure gauge 73 meets the specified value, the second manual shut-off valve 52 is closed to maintain pressure, a medium-pressure test is conducted, and the fifth manual shut-off valve 72 is opened to release pressure. If the value on the manual shut-off valve 59 on the pressure gauge does not meet the specified value and the power of the first booster pump 44 has reached maximum, the second pressure-regulating valve 28 and the first drive air on / off valve 31 are opened to operate the second booster pump 46 until the value on the manual shut-off valve 59 on the pressure gauge reaches the specified value. The first manual shut-off valve 50 is then closed to maintain pressure. After the high-pressure test, the fourth manual shut-off valve 58 is opened to release pressure.

[0066] If the air pressure control system is in automatic mode, the first solenoid valves 3-13, bypass ball valves 14-24, and electrical proportional valves 25-27 all operate, and the air-controlled shutoff valves are opened or closed by the external electrical control system. All manual shutoff valves are closed. Two different gas pressure levels are required (corresponding to three test ports, one low-pressure and two high-pressure). Obtain pressure data from the second pressure transmitter 60, the fifth pressure transmitter 74, and the eighth pressure transmitter 88. If any of the three values ​​do not meet their respective standards, the first air-controlled shutoff valve 40 is automatically opened. For the low-pressure test port, the fourth pressure regulating valve 41 and the fourth air-controlled stop valve 53 are automatically opened, and the eleventh air-controlled stop valve 84 and the third electrical proportional regulating valve 85 are closed, so that the output pressure of the low-pressure test port continues to rise. When the value of the eighth pressure transmitter 88 reaches the standard, the fourth pressure regulating valve 41 and the fourth air-controlled stop valve 53 are closed, and the eleventh air-controlled stop valve 84 and the third electrical proportional regulating valve 85 are opened to release the pressure. Among them, the third electrical proportional regulating valve 85 can adjust the speed of pressure relief.

[0067] For the two high-pressure test ports (the situation is the same for each high-pressure test port of the same pressure level, and this embodiment is described using the second pipe at the top as an example), the third pressure regulating valve 33, the third solenoid valve 35, and the second drive air switch valve 36 are first opened to enable the first booster pump 44 to operate. At this time, the second booster pump 46 is not operating, and the second air-controlled stop valve 49 is automatically opened, the fifth air-controlled stop valve 56 and the first electrical proportional control valve 57 are closed, and nitrogen is introduced, and the pressure of the high-pressure test port continues to rise. However, when the value of the second pressure transmitter 60 still does not reach the standard and the first booster pump 44 has reached the maximum power, the second pressure regulating valve 28, the second solenoid valve 30 and the first drive air switch valve 31 are automatically opened, so that the second booster pump 46 works together with the first booster pump 44, and the power of the second booster pump 46 is gradually increased until the value of the second pressure transmitter 60 reaches the standard. The third pressure regulating valve 33, the third solenoid valve 35, the second drive air switch valve 36, the second pressure regulating valve 28, the second solenoid valve 30, the first drive air switch valve 31 and the second air-controlled stop valve 49 are closed to maintain the pressure. After the high-pressure test, the fifth air-controlled stop valve 56 and the first electrical proportional control valve 57 are opened to release the pressure.

[0068] In this embodiment, the air pressure control system can provide low-pressure gas at the low-pressure test port, and can output high-pressure gas at the high-pressure test port under the action of the booster module. It can measure multiple pressure levels and has high measurement efficiency. It has automatic pressurization, automatic pressure maintenance, and automatic pressure relief functions, and the pressure relief speed is adjustable, easy to operate, reliable and durable, which can effectively improve the pressure measurement efficiency and accuracy. The booster pump output is adjustable and is suitable for air sealing performance testing of valves, manifolds and downhole tools of different pressure levels.

[0069] like Figure 3 As shown, a test system of the present invention includes an electrical control system, which is electrically connected to a pneumatic control system to control the pneumatic control system to output nitrogen of different pressure levels when the pneumatic control system is in an automatic state.

[0070] Among them, the electrical control system includes consoles, software, operating computers, industrial computers, PLC controllers, video surveillance displays, relays, buttons, indicator lights, communication modules, etc.

[0071] In addition, a video monitoring system can also be included for video monitoring, and the video monitoring system includes a camera, a video recorder, a hard disk, a display, etc. The test system adopts a mobile skid structure and can be moved freely.

[0072] Based on the air pressure control system, it is possible to test different pressure levels of nitrogen and can move freely, which facilitates operations on the construction site.

[0073] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pneumatic pressure control system, consisting of a pneumatic shut-off valve, a booster module, a low-pressure test module and at least one high-pressure test module, characterized in that: The device comprises a nitrogen inlet, which is connected to the low-pressure test port through a first pipeline. In the direction from the nitrogen inlet to the low-pressure test port, the first pipeline is sequentially provided with a gas-controlled shut-off valve and a low-pressure test module; The first inlet of the boosting module is connected to the compressed air inlet, a first branch pipe is provided between the air-controlled shut-off valve and the low-pressure test module, the first branch pipe is connected to the second inlet of the boosting module, and the outlet of the boosting module is connected to the high-pressure test port via at least one second pipe, and each second pipe corresponds to a high-pressure test port, and each second pipe is provided with a high-pressure test module; The boost module includes one boost unit or n boost units; When the number of the boosting unit is one, the first inlet of the boosting unit is connected to the compressed air inlet via a pipeline, the second inlet of the boosting unit is connected to the first branch pipeline, and the outlet of the boosting unit is connected to the high-pressure test port via at least one second pipeline; When the number of boosting units is n, where n is a positive integer greater than or equal to 2, the first inlets of all boosting units are connected to the compressed air inlet, the second inlet of the first boosting unit is connected to the first branch pipeline, the outlet of the k-1th boosting unit is connected to the second inlet of the kth boosting unit, and the outlet of the nth boosting unit is connected to the high-pressure test port via at least one second pipeline, wherein k is a positive integer greater than or equal to 2, and k is less than or equal to n; The boosting unit includes a pressure regulating valve, a driving solenoid valve, a driving gas switch valve and a boosting pump; The inlet of the pressure regulating valve is connected to the compressed air inlet through a pipeline, the outlet of the pressure regulating valve is connected to the second port of the driving solenoid valve and the driving gas switch valve respectively, the first port of the driving gas switch valve is connected to the driving solenoid valve, the third port of the driving gas switch valve is connected to the control end of the booster pump, the nitrogen inlet end of the booster pump serves as the second inlet of the boosting unit, and the nitrogen outlet end of the booster pump serves as the outlet of the boosting unit; The low-voltage test module includes a first switch module, a first pressure relief module and a first detection module; In the direction from the nitrogen inlet to the low-pressure test port, a gas-controlled shut-off valve, a first switch module, and a first detection module are sequentially provided on the first pipeline. A first pressure relief pipeline is provided on the outlet side of the first switch module provided on the first pipeline. The first pressure relief pipeline is connected to the pressure relief port, and the first pressure relief pipeline is provided with a first pressure relief module. The high-voltage test module includes a second switch module, a second pressure relief module and a second detection module; In the direction from the outlet of the boosting module to the high-pressure test port, a second switch module and a second detection module are sequentially arranged on the second pipe, a second pressure relief pipe is arranged on one side of the outlet of the second switch module, the second pressure relief pipe is connected to the pressure relief port, and a second pressure relief module is arranged on the second pressure relief pipe; The air pressure control system further comprises at least one control module and at least one electric proportional valve, each control module comprising a solenoid valve and a bypass ball valve; For each control module, the first interface of the bypass ball valve is connected to the compressed air inlet via the solenoid valve, the second interface of the bypass ball valve is connected to the compressed air inlet, and the third interface of the bypass ball valve is connected to an air-controlled stop valve. When the air pressure control system is in the automatic state, the external electrical control system controls the solenoid valve, thereby controlling the opening and closing of the air-controlled stop valve. For each electric proportional valve, one end of the electric proportional valve is connected to the compressed air inlet, and the other end is connected to an electric proportional control valve, so that when the air pressure control system is in the automatic state, the external electric control system controls the electric proportional valve, and then controls the opening of the electric proportional control valve.

2. The air pressure control system according to claim 1, characterized in that: Including automatic status; When in the automatic state, the first switch module includes a fourth pressure regulating valve and a fourth air-controlled stop valve, the first pressure relief module includes an eleventh air-controlled stop valve and a third electrical proportional control valve, and the first detection module includes an eighth pressure transmitter; In the direction from the nitrogen inlet to the low-pressure test port, the first air-controlled stop valve, the fourth pressure regulating valve, the fourth air-controlled stop valve and the eighth pressure transmitter are sequentially arranged on the first pipeline, and the eleventh air-controlled stop valve and the third electrical proportional control valve are both arranged on the first pressure relief pipeline.

3. The air pressure control system according to claim 1, characterized in that: When in the automatic state, the second switch module includes a second air-controlled stop valve, the second pressure relief module includes a fifth air-controlled stop valve and a first electrical proportional control valve, and the second detection module includes a second pressure transmitter; In the direction from the outlet of the boost module to the high-pressure test port, a second air-controlled stop valve and a second pressure transmitter are sequentially arranged on the second pipeline, and a fifth air-controlled stop valve and a first electrical proportional control valve are arranged on the second pressure relief pipeline.

4. The air pressure control system according to claim 1, characterized in that: The air pressure control system further includes at least one supplementary detection module, which is arranged on a side of the second pipeline close to the high-pressure test port; The supplementary detection module includes a pressure gauge, a pressure transmitter and a gas-controlled stop valve; the pressure gauge and the pressure transmitter are connected to one end of the gas-controlled stop valve, and the other end of the gas-controlled stop valve is connected to the high-pressure test port.

5. A test system comprising the air pressure control system according to any one of claims 1 to 4, characterized in that: It also includes an electrical control system; The electrical control system is electrically connected to the air pressure control system to control the air pressure control system to output nitrogen of different pressure levels when the air pressure control system is in an automatic state.

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