Intelligent pressure test system

Abstract

The utility model belongs to the technical field of pressure regulation control, and discloses an intelligent pressure test system which comprises a hydraulic power system, a control loop system and a control system. The hydraulic power system is arranged in the control loop system, the hydraulic power system comprises an electric pump set, the electric pump set provides testing requirements of large-displacement low pressure and small-displacement high pressure for testing equipment, and the electric pump set comprises a large-displacement low-pressure pump, a small-displacement high-pressure pump and a variable frequency motor; the large-displacement low-pressure pump and the small-displacement high-pressure pump are both connected with the variable frequency motor, the variable frequency motor is connected with the control system, and the working state of the variable frequency motor is switched through the control system so as to control the large-displacement low-pressure pump or the small-displacement high-pressure pump to operate. The device has the advantages that the use requirements of high pressure and large displacement are met, the operation complexity and cost of the device are reduced, and meanwhile the occupied space of the whole device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of voltage regulation control, and more specifically, to an intelligent pressure testing system. Background Art

[0002] High-pressure testing is required for all types of high-pressure equipment, such as high-pressure vessels, high-pressure components, and high-pressure process flow devices, to eliminate safety accidents caused by failures in high-pressure operating conditions. High-pressure testing is to provide a high-pressure pressure source for the test equipment to detect whether the sealing performance or strength performance of the object being tested can meet the use requirements.

[0003] At present, there is an incompatible contradiction between high pressure and large displacement in conventional electric pressure test systems. At the same power, the higher the pressure, the smaller the displacement, and the larger the displacement, the lower the pressure. When performing large displacement filling and high pressure testing, two sets of motors and pumps are required, namely a large displacement low-pressure pump and a small displacement high-pressure pump, to control the large displacement and high pressure respectively. First, use the large displacement low-pressure pump to fill the test equipment, and then use the small displacement high-pressure pump to increase the pressure. Using two sets of motors and pumps during the test requires two sets of electronic control systems, resulting in the defects of large size and complex operation of the entire equipment. Utility Model Content

[0004] The embodiment of the present application provides an intelligent pressure testing system that is compatible with the use requirements of high pressure and large displacement, reduces the operating complexity and cost of the equipment, and at the same time reduces the space occupied by the entire set of equipment.

[0005] The intelligent pressure test system provided in this application adopts the following technical solution:

[0006] An intelligent pressure testing system includes a hydraulic power system, a control circuit system and a control system;

[0007] The hydraulic power system is arranged in the control loop system, and the hydraulic power system includes an electric pump group to provide large-displacement low-pressure and small-displacement high-pressure testing requirements for the testing equipment. The electric pump group includes a large-displacement low-pressure pump, a small-displacement high-pressure pump and a variable frequency motor. The large-displacement low-pressure pump and the small-displacement high-pressure pump are both connected to the variable frequency motor, and the variable frequency motor is connected to the control system. The working state of the variable frequency motor is switched by the control system to control the operation of the large-displacement low-pressure pump or the small-displacement high-pressure pump.

[0008] Optionally, the hydraulic power system is also provided with a frequency converter, the control system is connected to the frequency converter, and the frequency converter is electrically connected to the variable frequency motor, and the control system adjusts the parameters of the frequency converter to control the variable frequency motor to achieve speed regulation, thereby controlling the flow of the large-displacement low-pressure pump or the small-displacement high-pressure pump.

[0009] Optionally, the control loop system includes a main loop, on which is provided a water inlet filter, an automatic shut-off valve, an automatic stop valve and a manual stop valve connected in series in sequence, and the inlet end of the main loop is connected to the electric pump group through the water inlet filter and the automatic shut-off valve, so that the external supply medium enters the electric pump group through the automatic shut-off valve after being filtered by the water inlet filter; the medium flowing out of the electric pump group flows into the testing equipment through the automatic stop valve and the manual stop valve.

[0010] Optionally, the control loop system includes a shunt branch for diverting the main loop, and the shunt branch is connected to the main loop; the shunt branch is provided with an automatic regulating valve, and the automatic regulating valve is connected to the control system, and the flow of the main loop is controlled by adjusting the automatic regulating valve to adjust the speed of pressure boost at the test equipment end.

[0011] Optionally, a pressure transmitter for collecting pressure values ​​on the main circuit is provided on the main circuit, and the pressure transmitter is connected to the control system. The control system uses the electrical signal feedback of the pressure value of the pressure transmitter to match the adjustment amplitude of the automatic regulating valve.

[0012] Optionally, the control circuit system includes a pressure relief circuit, the main circuit is provided with a one-way valve, and the pressure relief circuit is connected to the output end of the electric pump group through the one-way valve; the pressure relief circuit includes a pressure relief path, and the pressure relief path is provided with an overflow valve for pressure relief, and the output end of the one-way valve is connected to the overflow valve, and excess pressure is released through the overflow valve.

[0013] Optionally, the pressure relief circuit includes two pressure relief lines, and the two pressure relief lines are provided with a pressure relief valve for pressure relief, the input end of the pressure relief valve is connected to the output end of the automatic stop valve or the manual stop valve, and the pressure relief valve controls the system pressure by adjusting the fluid pressure.

[0014] Optionally, the pressure relief valve includes an automatic pressure relief valve, and a high-pressure filter for filtering reflux medium is provided on the second pressure relief line, the output end of the high-pressure filter is connected to the automatic pressure relief valve, and the pressure relief reflux medium is filtered by the high-pressure filter and then discharged through the automatic pressure relief valve.

[0015] Optionally, the pressure relief valve further includes a manual pressure relief valve, and the pressure-relieved and refluxed medium is discharged through the manual pressure relief valve.

[0016] Optionally, the control system includes a controller, and the controller is electrically connected to the frequency converter and the pressure transmitter.

[0017] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0018] At the beginning of the test, there is no medium in the test equipment, and it needs to be quickly filled with medium through a large-displacement low-pressure pump. By switching the working state of the variable frequency motor to control the large-displacement low-pressure pump to quickly fill the medium into the control loop system and the test equipment, and then switching the working state of the variable frequency motor to control the small-displacement high-pressure pump to boost the pressure to the required test pressure. By using a variable frequency motor to connect two electric pumps, dual-displacement and dual-pressure outputs are achieved, which is compatible with the use requirements of high pressure and large displacement, reduces the operating complexity and cost of the equipment, and reduces the floor space of the entire set of equipment. The displacement and pressure are adjusted according to different working conditions, which has great flexibility and adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a system schematic diagram of an intelligent pressure testing system disclosed in an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1. Water inlet filter; 2. Automatic shut-off valve; 3. Large-displacement low-pressure pump; 4. Small-displacement high-pressure pump; 5. Frequency conversion motor; 6. Check valve; 7. Overflow valve; 8. Automatic regulating valve; 9. Automatic stop valve; 10. Manual stop valve; 11. Pressure gauge; 12. Pressure transmitter; 13. High-pressure filter; 14. Automatic pressure relief valve; 15. Manual pressure relief valve; 16. Frequency converter; 17. Controller. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings.

[0023] The embodiment of the present application provides an intelligent pressure testing system that is compatible with the use requirements of high pressure and large displacement, reduces the operating complexity and cost of the equipment, and at the same time reduces the space occupied by the entire set of equipment.

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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 ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] For ease of understanding, the intelligent pressure test system in the embodiment of the present application is described below. Figure 1 , an embodiment of the intelligent pressure test system in the embodiment of the present application includes a hydraulic power system, a control loop system and a control system. The hydraulic power system is arranged in the control loop system, and transmits pressure in the control loop system to realize force transmission and control, and provides a power source for the test equipment. In this embodiment, the control system includes a controller 17, which is used to manage and control various hardware and software resources of the intelligent pressure test system to realize the normal operation and function realization of the intelligent pressure test system.

[0027] The hydraulic power system includes an electric pump group and a frequency converter 16. The electric pump group provides the test equipment with large-displacement low-pressure and small-displacement high-pressure test requirements. The frequency converter 16 can achieve speed adjustment within a certain range, so as to control the output flow of the electric pump group. Specifically, the electric pump group includes a large-displacement low-pressure pump 3, a small-displacement high-pressure pump 4 and a variable-frequency motor 5. The large-displacement low-pressure pump 3 and the small-displacement high-pressure pump 4 are both connected to the variable-frequency motor 5. The variable-frequency motor 5 is connected to the control system, and the working state of the variable-frequency motor 5 is switched by the control system to control the operation of the large-displacement low-pressure pump 3 or the small-displacement high-pressure pump 4. At the beginning of the test, there is no medium in the test equipment, and the medium needs to be quickly filled by the large-displacement low-pressure pump 3. The working state of the variable-frequency motor 5 is switched to control the large-displacement low-pressure pump 3 to quickly fill the control loop system and the test equipment with the medium, and then the working state of the variable-frequency motor 5 is switched to control the small-displacement high-pressure pump 4 to boost the pressure to the required test pressure. By using a variable frequency motor 5 to connect two electric pumps, dual displacement and dual pressure output is achieved, which is compatible with the use requirements of high pressure and large displacement, reduces the operating complexity and cost of the equipment, and reduces the floor space of the entire equipment. The displacement and pressure are adjusted according to different working conditions, which has great flexibility and adjustability.

[0028] The control system is connected to the frequency converter 16, and the frequency converter 16 is electrically connected to the variable frequency motor 5. The control system adjusts the parameters of the frequency converter 16 to control the variable frequency motor 5 to achieve corresponding speed adjustment, thereby controlling the flow of the large-displacement low-pressure pump 3 or the small-displacement high-pressure pump 4. The controller 17, the frequency converter 16 and the variable frequency motor 5 are connected through the power signal line to control the variable frequency motor 5 to switch the working state to achieve the start and stop of the large-displacement low-pressure pump 3 or the small-displacement high-pressure pump 4. At the same time, the controller 17 adjusts the parameters of the frequency converter 16 to control the variable frequency motor 5 to achieve speed adjustment within a certain range to control the flow of the large-displacement low-pressure pump 3 or the small-displacement high-pressure pump 4.

[0029] The control circuit system includes a main circuit, which includes an inlet filter 1, an automatic shut-off valve 2, an electric pump group, a one-way valve 6, an automatic shut-off valve 9 and a manual shut-off valve 10 connected in series in sequence. The inlet end of the main circuit is connected to the electric pump group through the inlet filter 1 and the automatic shut-off valve 2, so that the external supply medium passes through the inlet filter 1 and enters the electric pump group through the automatic shut-off valve 2; the medium flowing out of the electric pump group flows into the test equipment through the one-way valve 6, the automatic shut-off valve 9 and the manual shut-off valve 10. The automatic shut-off valve 9 can realize the automatic control and protection of the system, and can cut off the fluid flow in time under abnormal conditions to reduce the possibility of accidents, while the manual shut-off valve 10 can provide the flexibility of manual operation and facilitate emergency shut-off and maintenance operations. By setting the automatic shut-off valve 9 and the manual shut-off valve 10 at the same time, automatic control can be realized when the system is operating normally, and it can be operated quickly and accurately when manual intervention is required, taking into account the safety and operational convenience of the intelligent pressure adaptation system.

[0030] Furthermore, the main circuit is provided with a pressure transmitter 12 and a pressure gauge 11 for collecting the pressure value on the main circuit. The pressure transmitter 12 is a device that converts the measured pressure into a standard signal output, and the pressure gauge 11 is an instrument that directly measures the pressure of the measured medium. The pressure transmitter 12 is electrically connected to the controller 17, and the controller 17 matches the adjustment amplitude of the automatic regulating valve 8 through the electrical signal feedback of the pressure value on the main circuit collected by the pressure transmitter 12. That is, the pressure value on the main circuit is collected by the pressure transmitter 12, and the controller 17 reads the data collected by the pressure transmitter 12, and controls the automatic regulating valve 8 through logical judgment, so that the automatic regulating valve 8 automatically matches the adjustment amplitude, realizes automatic adjustment, and achieves the effect of accurately controlling the output pressure.

[0031] In order to achieve the requirement of controlling the boost speed of the main circuit, it is necessary to control the flow of the main circuit. The control circuit system also includes a shunt branch for shunting the main circuit, and the shunt branch is connected to the main circuit; the shunt branch is provided with an automatic regulating valve 8, and the automatic regulating valve 8 is electrically connected to the controller 17. The flow of the main circuit is controlled by adjusting the automatic regulating valve 8 to adjust the boost speed of the test equipment end. When the main circuit requires a large flow rate and rapid boost, the automatic regulating valve 8 controls the shunt branch to close. When the main circuit pressure approaches the target pressure, the automatic regulating valve 8 controls the shunt branch to open and control the discharge volume to increase, and the corresponding main circuit flow decreases, and the boost speed from the main circuit to the test equipment slows down.

[0032] When the system is over-pressured, in order to ensure the safety of the equipment, the control circuit system also includes a pressure relief circuit for reducing the system pressure. The pressure relief circuit is connected to the output end of the electric pump group through a one-way valve 6. The pressure relief circuit includes pressure relief line one and pressure relief line two. Pressure relief line one controls the system pressure by adjusting the fluid flow rate, and pressure relief line two controls the system pressure by adjusting the fluid pressure.

[0033] Specifically, the pressure relief line is provided with a relief valve 7 for overpressure protection, and the output end of the one-way valve 6 is connected to the relief valve 7. The relief valve 7 can be set to a fixed pressure value, which is generally higher than the normal working pressure value. When the system fails or is abnormal and the equipment is over-pressured, the relief valve 7 will automatically open to release the excess pressure to maintain the stable pressure of the system and ensure the safety of the equipment.

[0034] The second pressure relief line is provided with a pressure relief valve for pressure relief, and the input end of the pressure relief valve is connected to the output end of the automatic stop valve 9 or the manual stop valve 10. The pressure relief valve controls the pressure by adjusting the pressure. When the pressure in the system exceeds the set value, the pressure relief valve will open and discharge the excess fluid from the system to protect the system from being damaged by excessive pressure.

[0035] In this embodiment, in order to ensure that the system can safely release pressure when an overpressure occurs, the pressure relief valve includes an automatic pressure relief valve 14 and a manual pressure relief valve 15. A high-pressure filter 13 for filtering the reflux medium is provided on the second pressure relief circuit. The output end of the high-pressure filter 13 is connected to the automatic pressure relief valve 14. The medium refluxed by the pressure relief is filtered by the high-pressure filter 13 and then discharged through the automatic pressure relief valve 14. The medium returned by the pressure relief is relatively dirty and needs to be filtered by the high-pressure filter 13 before being discharged through the automatic pressure relief valve 14 to protect the automatic pressure relief valve 14 from being damaged by impurities. When the high-pressure filter 13 is blocked or the automatic pressure relief valve 14 fails and cannot be opened, the medium refluxed by the pressure relief can be discharged through the manual pressure relief valve 15.

[0036] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent pressure testing system, characterized in that: Including hydraulic power system, control circuit system and control system; The hydraulic power system is arranged in the control loop system, and the hydraulic power system comprises an electric pump group to provide large-displacement low-pressure and small-displacement high-pressure testing requirements for the testing equipment, and the electric pump group comprises a large-displacement low-pressure pump (3), a small-displacement high-pressure pump (4) and a variable frequency motor (5), and the large-displacement low-pressure pump (3) and the small-displacement high-pressure pump (4) are both connected to the variable frequency motor (5), and the variable frequency motor (5) is connected to the control system, and the working state of the variable frequency motor (5) is switched by the control system to control the operation of the large-displacement low-pressure pump (3) or the small-displacement high-pressure pump (4).

2. The intelligent pressure testing system according to claim 1, characterized in that: The hydraulic power system is also provided with a frequency converter (16), the control system is connected to the frequency converter (16), and the frequency converter (16) is electrically connected to the variable frequency motor (5), and the control system adjusts the parameters of the frequency converter (16) to control the variable frequency motor (5) to achieve speed regulation, thereby controlling the flow of the large-displacement low-pressure pump (3) or the small-displacement high-pressure pump (4).

3. The intelligent pressure testing system according to claim 2, characterized in that: The control circuit system comprises a main circuit, on which a water inlet filter (1), an automatic shut-off valve (2), an automatic stop valve (9) and a manual stop valve (10) are sequentially connected in series. The inlet end of the main circuit is connected to the electric pump group through the water inlet filter (1) and the automatic shut-off valve (2), so that the external supply medium passes through the water inlet filter (1) and enters the electric pump group through the automatic shut-off valve (2); the medium flowing out of the electric pump group flows into the test equipment through the automatic shut-off valve (9) and the manual shut-off valve (10).

4. The intelligent pressure testing system according to claim 3, characterized in that: The control loop system comprises a shunt branch for shunting the main loop, the shunt branch being connected to the main loop; the shunt branch is provided with an automatic regulating valve (8), the automatic regulating valve (8) being connected to the control system, and the flow of the main loop is controlled by adjusting the automatic regulating valve (8) to adjust the speed of pressure increase at the test equipment end.

5. The intelligent pressure testing system according to claim 4, characterized in that: The main circuit is provided with a pressure transmitter (12) for collecting the pressure value on the main circuit. The pressure transmitter (12) is connected to the control system. The control system uses the electrical signal feedback of the pressure value of the pressure transmitter (12) to match the adjustment amplitude of the automatic regulating valve (8).

6. The intelligent pressure testing system according to claim 3, characterized in that: The control circuit system comprises a pressure relief circuit, the main circuit is provided with a one-way valve (6), and the pressure relief circuit is connected to the output end of the electric pump group through the one-way valve (6); the pressure relief circuit comprises a pressure relief path, and the pressure relief path is provided with a relief valve (7) for pressure relief, the output end of the one-way valve (6) is connected to the relief valve (7), and excess pressure is released through the relief valve (7).

7. The intelligent pressure testing system according to claim 6, characterized in that: The pressure relief circuit comprises two pressure relief paths, wherein the two pressure relief paths are provided with a pressure relief valve for pressure relief, wherein the input end of the pressure relief valve is connected to the output end of the automatic stop valve (9) or the manual stop valve (10), and the pressure relief valve controls the system pressure by adjusting the fluid pressure.

8. The intelligent pressure testing system according to claim 7, characterized in that: The pressure relief valve comprises an automatic pressure relief valve (14); a high-pressure filter (13) for filtering a reflux medium is arranged on the second pressure relief line; an output end of the high-pressure filter (13) is connected to the automatic pressure relief valve (14); the pressure relief reflux medium is filtered by the high-pressure filter (13) and then discharged through the automatic pressure relief valve (14).

9. The intelligent pressure testing system according to claim 7, characterized in that: The pressure relief valve further comprises a manual pressure relief valve (15), through which the pressure relief refluxed medium is discharged.

10. The intelligent pressure testing system according to claim 5, characterized in that: The control system comprises a controller (17), and the controller (17) is electrically connected to the frequency converter (16) and the pressure transmitter (12).

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