Detection device and method of pressure vacuum alternating testing machine

Abstract

According to the detection device and method of the pressure vacuum alternating testing machine, the micro vacuum pump is used for extracting control in the test sealing box, and the pressure sensor and the digital pressure gauge are matched to detect the pressure of equipment in the test sealing box, so that the equipment can be prevented from being damaged, and the detection accuracy is improved. And the accuracy, reliability, programmability and flexibility of the test can be improved, data processing and connection are convenient, and the comprehensiveness of the test can be improved and the stability of signal transmission during the test can be ensured due to multiple forms and applications and high customization. The method provided by the invention is clear in steps and simple and convenient to operate, detection personnel do not need to carry out complex equipment adjustment and data analysis, the accuracy and consistency of detection are improved, the detection period is shortened, and the working efficiency is improved; and meanwhile, the performance of the alternating machine can be comprehensively evaluated by a plurality of key technical indexes, the stability and reliability of the alternating machine in long-term use are ensured, and the application scene is wide.

Description

Technical Field

[0001] The invention relates to the technical field of pressure vacuum alternating test machines, in particular to a pressure vacuum alternating test machine detection device and a method thereof. Background Art

[0002] With the continuous development of industrial technology, higher and higher requirements are put forward for the design, manufacture and inspection of pressure equipment. As an important testing equipment, pressure vacuum alternating test machine (hereinafter referred to as alternating machine) is widely used in durability and reliability testing of pressure equipment. This type of equipment can simulate the pressure fluctuations in the actual working environment, and accelerate the aging process of pressure equipment by repeatedly applying pressure signals of specific amplitude and frequency, so as to evaluate its performance in long-term use.

[0003] Current pressure vacuum alternating testers usually use piston or valve-controlled adjustment methods, and the output pressure waveforms include sine waves, square waves, trapezoidal waves and other forms. When designing and manufacturing these devices, it is necessary to consider multiple technical indicators such as sealing, frequency deviation, amplitude deviation, amplitude stability and alternating reliability. However, in the current prior art, there are few detection devices and detection methods for the performance of alternating machines. Therefore, the present invention provides a detection device and method for detecting a pressure vacuum alternating tester. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a detection device and method for a pressure-vacuum alternating test machine.

[0005] In a first aspect, a detection device for a pressure vacuum alternating tester comprises: a main body, wherein a vacuum pressure test assembly, a partition and a control detection assembly are arranged inside the main body from top to bottom;

[0006] The vacuum pressure test assembly comprises a test sealing box, the interior of which is fixedly connected to a support plate, a micro vacuum pump, a pressure sensor and a digital pressure gauge are installed at the bottom of the support plate, and an air pipe is fixedly connected to the top of the micro vacuum pump, and the air pipe extends to the top of the support plate;

[0007] The control detection component includes a carrier board, and a power supply, a voltage detection module, a current detection module, a processor, a digital oscilloscope, a signal transmission module, a filtering unit, an anti-interference module and a capacitor are fixedly connected to the side of the carrier board;

[0008] The power supply, the voltage detection module and the current detection module are all electrically connected;

[0009] The current detection module, the processor and the digital oscilloscope are all electrically connected;

[0010] The digital oscilloscope, the signal transmission module and the filtering unit are all electrically connected;

[0011] The filter unit, the anti-interference module and the capacitor are all electrically connected.

[0012] Furthermore, the main body includes a loading box, a radiator is fixedly connected to the right side of the loading box, and a box door is arranged on the front side of the loading box.

[0013] Furthermore, a control panel is fixedly connected to the top of the loading box, a touch display screen is fixedly connected to the top of the control panel, and operation buttons are arranged below the touch display screen.

[0014] Furthermore, a start button is arranged next to the control panel.

[0015] In a second aspect, the present invention provides a method for detecting a pressure-vacuum alternating tester, characterized in that it comprises the following steps:

[0016] S1: Preparation before testing;

[0017] S2: Appearance and functional inspection;

[0018] S3: Indication deviation test of pressure instrument equipped with alternating current machine;

[0019] S4: Sealing test;

[0020] S5: Alternating frequency deviation test;

[0021] S6: Alternating amplitude deviation test;

[0022] S7: Stability test of alternating amplitude;

[0023] S8: Alternating reliability test.

[0024] Furthermore, the step S2: appearance and functionality inspection includes: inverter appearance inspection, interface inspection, safety function inspection and working status inspection.

[0025] Further, the step S5: alternating frequency deviation test comprises the following steps:

[0026] Step 1: Equipment connection: Connect the pressure sensor or digital pressure gauge to the output port of the alternator, and connect it to an oscilloscope or data acquisition software;

[0027] Step 2: Set the frequency: Set the AC machine to run at 0.5Hz and 1Hz;

[0028] Step 3: Data acquisition: Continuously collect 100 cycles of the alternating signal, obtain the actual alternating frequency through Fourier transform, and detect whether its deviation meets the requirements.

[0029] Further, the step S6: alternating amplitude deviation test comprises the following steps:

[0030] Step 1: Build the detection system: Similar to the frequency deviation test, connect the device and set the switch frequency to 60 times / min;

[0031] Step 2: Adjust the amplitude: Set the amplitude of the alternator according to the specification requirements and run for 5 minutes;

[0032] Step 3: Amplitude calculation: Select the waveform data from the 6th to the 10th minute, calculate the average of the upper and lower limits of the amplitude, and compare it with the set amplitude to verify whether it meets the requirements.

[0033] Furthermore, the step S7: testing the stability of the alternating amplitude comprises the following steps:

[0034] Step 1: Record the initial amplitude: After the alternating amplitude deviation test is completed, record the average amplitude of the alternator;

[0035] Step 2: Isolate the standard: close the valve between the standard and the alternator, and continue to run the alternator;

[0036] Step 3: Monitor changes: After every 10,000 runs, open the isolation valve to monitor the amplitude changes and verify whether the amplitude error meets the requirements. Repeat the test until 30,000 alternations are completed.

[0037] Furthermore, the step S8: alternating reliability test, comprises the following steps:

[0038] Step 1: Record the number of alternations: After completing the 30,000 alternation tests, record the number of alternations of the alternator within 5 minutes and compare it with the data of the standard instrument;

[0039] Step 2: Calculate the deviation: Calculate the deviation of the number of alternations and verify whether it is within the specified range;

[0040] Step 3: Check the sealing: After the test, check the sealing of each interface of the AC machine to confirm whether the whole machine can work normally.

[0041] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0042] 1. The present invention provides a detection device for a pressure-vacuum alternating test machine. By utilizing a micro vacuum pump to extract the control inside a test sealing box, and cooperating with a pressure sensor and a digital pressure gauge to detect the pressure of the equipment inside the test sealing box, it can not only prevent damage to the equipment, but also increase the accuracy of the test. The pressure sensor has high accuracy, a large measurement range, and good frequency response characteristics. The digital pressure gauge has the following characteristics: high accuracy and reliability, programmability and flexibility, convenient data processing and connection, multiple forms and applications, and high degree of customization.

[0043] 2. By using the voltage detection module and the current detection module, the current and voltage of the equipment to be detected can be tested to increase the comprehensiveness of the test. At the same time, the filter unit and the anti-interference module can ensure the stability of signal transmission during the test.

[0044] 3. The detection method of the pressure vacuum alternating tester provided by the present invention can realize high-precision detection, and the method of the present invention has clear steps and is easy to operate. The detection personnel do not need to perform complex equipment adjustment and data analysis. Through the systematic detection process, human errors are reduced, the accuracy and consistency of the detection are improved, the detection cycle is shortened, and the work efficiency is improved.

[0045] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0047] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0048] Figure 2 It is a schematic diagram of the structure of the vacuum pressure testing assembly in the present invention.

[0049] Figure 3 It is a schematic diagram of the structure of the control component in the present invention.

[0050] Figure 4 It is a schematic diagram of the structure of the control and detection component in the present invention.

[0051] Figure numerals: 1. Main body; 101. Loading box; 102. Radiator; 103. Box door; 104. Control panel; 105. Touch screen; 106. Operation button; 107. Start button; 2. Vacuum pressure test assembly; 201. Test sealing box; 202. Support plate; 203. Miniature vacuum pump; 204. Air pipe; 205. Pressure sensor; 206. Digital pressure gauge; 3. Partition; 4. Control detection assembly; 401. Support plate; 402. Power supply; 403. Voltage detection module; 404. Current detection module; 405. Processor; 406. Digital oscilloscope; 407. Signal transmission module; 408. Filter unit; 409. Anti-interference module; 410. Capacitor. DETAILED DESCRIPTION

[0052] The embodiments of the present application provide a detection device and method for a pressure-vacuum alternating test machine.

[0053] The technical solution in the embodiment of the present application has the following general idea:

[0054] refer to Figures 1 to 4 As shown, this embodiment provides a detection device for a pressure vacuum alternating tester, comprising: a main body 1, wherein a vacuum pressure test assembly 2, a partition 3 and a control detection assembly 4 are arranged inside the main body 1 from top to bottom;

[0055] The vacuum pressure test assembly 2 includes a test sealed box 201, the interior of the test sealed box 201 is fixedly connected to a support plate 202, a micro vacuum pump 203, a pressure sensor 205 and a digital pressure gauge 206 are installed at the bottom of the support plate 202, and an air pipe 204 is fixedly connected to the top of the micro vacuum pump 203, and the air pipe 204 extends to the top of the support plate 202. The micro vacuum pump 203 is used to extract the control inside the test sealed box 201, and the pressure of the equipment inside the test sealed box 201 is detected in conjunction with the pressure sensor 205 and the digital pressure gauge 206, which can not only prevent damage to the equipment, but also increase the accuracy of the test, and the pressure sensor 205 has high precision, a large measurement range, and good frequency response characteristics, and the digital pressure gauge 206 has the characteristics of high precision and reliability, programmability and flexibility, convenient data processing and connection, multiple forms and applications, and high customization.

[0056] The control detection component 4 includes a carrier plate 401, and the side of the carrier plate 401 is fixedly connected with a power supply 402, a voltage detection module 403, a current detection module 404, a processor 405, a digital oscilloscope 406, a signal transmission module 407, a filter unit 408, an anti-interference module 409 and a capacitor 410; wherein the power supply 402, the voltage detection module 403 and the current detection module 404 are all electrically connected; the current detection module 404, the processor 405 and the digital oscilloscope 406 are all electrically connected; the digital oscilloscope 406, the signal transmission module 407 and the filter unit 408 are all electrically connected; the filter unit 408, the anti-interference module 409 and the capacitor 410 are all electrically connected. The voltage detection module 403 and the current detection module 404 can be used to test the current and voltage of the equipment to be detected, thereby increasing the comprehensiveness of the test, and the filter unit 408 and the anti-interference module 409 can ensure the stability of signal transmission during the test.

[0057] In addition, the main body 1 includes a loading box 101, a radiator 102 is fixedly connected to the right side of the loading box 101, and a box door 103 is arranged on the front side of the loading box 101. A control panel 104 is fixedly connected to the top of the loading box 101, a touch screen 105 is fixedly connected to the top of the control panel 104, and an operation button 106 is arranged on the lower side of the touch screen 105. A start button 107 is arranged on the right side of the control panel 104. The function of the radiator 102 is to absorb the heat and then dissipate it into or outside the chassis to ensure that the temperature of the computer components is normal. The advantages of the radiator 102 include strong pressure resistance, easy installation and maintenance, beautiful appearance, moderate cost, comfortable dissipation mode and high thermal efficiency.

[0058] During the inspection, the following steps must be performed first: S1: Preparation before inspection; S2: Appearance and functional inspection S3: Indication deviation test of the pressure instrument equipped with the alternating machine; S4: Sealing test; S5: Alternating frequency deviation test; S6: Alternating amplitude deviation test; S7: Alternating amplitude stability test; S8: Alternating reliability test.

[0059] Specifically, S1: Preparations before testing include: Confirming the medium: According to the use requirements of the AC machine to be tested, ensure that the liquid or gas medium used meets the standards. Liquid medium: Check whether the water quality is clean and there must be no impurities such as oil, and inject the medium into the AC machine. Gas medium: Ensure that the pipeline is clean and the connection method is firm. Check the equipment: Check whether the various interfaces of the AC machine are intact and whether the sealing structure is normal.

[0060] S2: Appearance and functional inspection include: Visual inspection: Check the appearance of the alternator, including whether the nameplate is clear (equipment name, model, instrument number, etc.); Interface inspection: Ensure that each interface is intact and free of burrs; Safety function: Confirm whether it has a rapid pressure relief function; Working status inspection: Observe the pressure control of the alternator during operation, and check whether there is convex jump, jamming, leakage, etc.

[0061] S3: The indication deviation test of the pressure instrument equipped with the alternating current machine includes: Instrument selection: select the corresponding standard instrument according to the configuration of the alternating current machine; Indication deviation detection: perform indication deviation test on the pressure gauge, digital pressure gauge 206, etc. according to the corresponding verification procedures.

[0062] S4: Sealing test includes: Equipment connection: install the standard pressure gauge at any output port of the alternator, and seal other interfaces; Boost pressure to the test point: boost pressure to the specified pressure point and keep the pressure stable for 1 minute; Measure pressure drop: cut off the pressure source, record the pressure value at the 6th minute, calculate the pressure drop value, and verify whether it meets the requirements.

[0063] S5: Alternating frequency deviation test includes: equipment connection: connect the pressure sensor 205 or the digital pressure gauge 206 to the output port of the alternating machine, and connect an oscilloscope or data acquisition software; set the frequency: set the alternating machine to run at a frequency of 0.5Hz and 1Hz, data acquisition: continuously collect 100 cycles of the alternating signal, obtain the actual alternating frequency through Fourier transform, and detect whether its deviation meets the requirements.

[0064] S6: Alternating amplitude deviation test includes: Setting up the detection system: Similar to the frequency deviation test, connecting the equipment and setting the switch frequency to 60 times / min, adjusting the amplitude: setting the amplitude of the alternating machine according to the specification requirements, running for 5 minutes, amplitude calculation: selecting the waveform data from the 6th to the 10th minute, calculating the average of the upper and lower amplitude limits, and comparing it with the set amplitude to verify whether it meets the regulations.

[0065] S7: The stability test of the alternating amplitude includes: recording the initial amplitude: after the alternating amplitude deviation test is completed, record the average amplitude of the alternating machine; isolating the standard: closing the valve between the standard and the alternating machine, and continuing to run the alternating machine; monitoring changes: every 10,000 operations, open the isolation valve to monitor the amplitude changes, verify whether the amplitude error meets the requirements, and repeat the test until 30,000 alternations are completed.

[0066] S8: Alternating reliability test includes: Recording the number of alternating times: After completing 30,000 alternating tests, record the number of alternating times of the alternating machine within 5 minutes and compare it with the data of the standard instrument; Calculating deviation: Calculate the deviation of the number of alternating times and verify whether it is within the specified range; Checking the sealing: After the test, check the sealing of each interface of the alternating machine to confirm whether the whole machine can work normally.

[0067] After completing the above steps, it is only necessary to open the loading box 101 using the box door 103, place the device under test on top of the support plate 202, and then close the box door 103 to keep the loading box 101 sealed, and then press the start button 107 to start the detection device, use the touch screen 105 and the operation button 106 to control the micro vacuum pump 203, use the air pipe 204 to suck the inside of the test sealing box 201, and apply vacuum pressure. At this time, the pressure sensor 205 and the digital pressure gauge 206 can be used to detect the pressure in the test sealing box 201, and the data can be transmitted to the processor 405. After processing and analysis by the processor 405, the obtained detection data can be displayed on the touch screen 105, and the pressure detection of the device under test can be completed.

[0068] The pressure vacuum alternating test machine detection device provided by the present invention can not only achieve high-precision detection, but also increase the comprehensiveness of the test and ensure the stability of signal transmission. The method steps of the present invention are clear and easy to operate. The detection personnel do not need to perform complex equipment adjustments and data analysis. Through the systematic detection process, human errors are reduced, the accuracy and consistency of detection are improved, the detection cycle is shortened, and work efficiency is improved; at the same time, multiple key technical indicators can be realized to comprehensively evaluate the performance of the alternating machine, ensuring its stability and reliability in long-term use, and the application scenarios are wide.

[0069] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A detection device for a pressure vacuum alternating test machine, characterized in that: include: A main body, wherein a vacuum pressure test assembly, a partition and a control detection assembly are arranged inside the main body from top to bottom; The vacuum pressure test assembly comprises a test sealing box, the interior of which is fixedly connected to a support plate, a micro vacuum pump, a pressure sensor and a digital pressure gauge are installed at the bottom of the support plate, and an air pipe is fixedly connected to the top of the micro vacuum pump, and the air pipe extends to the top of the support plate; The control detection component includes a carrier board, and a power supply, a voltage detection module, a current detection module, a processor, a digital oscilloscope, a signal transmission module, a filtering unit, an anti-interference module and a capacitor are fixedly connected to the side of the carrier board; The power supply, the voltage detection module and the current detection module are all electrically connected; The current detection module, the processor and the digital oscilloscope are all electrically connected; The digital oscilloscope, the signal transmission module and the filtering unit are all electrically connected; The filter unit, the anti-interference module and the capacitor are all electrically connected.

2. The detection device of the pressure-vacuum alternating test machine according to claim 1, characterized in that: The main body comprises a loading box, a radiator is fixedly connected to the right side of the loading box, and a box door is arranged on the front side of the loading box.

3. The detection device of the pressure-vacuum alternating test machine according to claim 2, characterized in that: The top of the loading box is fixedly connected with a control panel, the top of the control panel is fixedly connected with a touch display screen, and operation buttons are arranged below the touch display screen.

4. The detection device of the pressure-vacuum alternating test machine according to claim 3, characterized in that: A start button is arranged next to the control panel.

5. A detection method for a pressure-vacuum alternating test machine, characterized in that: The following steps are involved: S1: Preparation before testing; S2: Appearance and functional inspection; S3: Indication deviation test of pressure instrument equipped with alternating current machine; S4: Sealing test; S5: Alternating frequency deviation test; S6: Alternating amplitude deviation test; S7: Stability test of alternating amplitude; S8: Alternating reliability test.

6. The detection method of a pressure-vacuum alternating tester according to claim 5, characterized in that: The step S2: appearance and functionality inspection includes: inverter appearance inspection, interface inspection, safety function inspection and working status inspection.

7. The detection method of a pressure-vacuum alternating tester according to claim 5, characterized in that: The step S5: alternating frequency deviation test comprises the following steps: Step 1: Equipment connection: Connect the pressure sensor or digital pressure gauge to the output port of the alternator, and connect it to an oscilloscope or data acquisition software; Step 2: Set the frequency: Set the AC machine to run at 0.5Hz and 1Hz; Step 3: Data acquisition: Continuously collect 100 cycles of the alternating signal, obtain the actual alternating frequency through Fourier transform, and detect whether its deviation meets the requirements.

8. The detection method of a pressure-vacuum alternating test machine according to claim 5, characterized in that: The step S6: alternating amplitude deviation test comprises the following steps: Step 1: Build the detection system: Similar to the frequency deviation test, connect the device and set the switch frequency to 60 times / min; Step 2: Adjust the amplitude: Set the amplitude of the alternator according to the specification requirements and run for 5 minutes; Step 3: Amplitude calculation: Select the waveform data from the 6th to the 10th minute, calculate the average of the upper and lower limits of the amplitude, and compare it with the set amplitude to verify whether it meets the requirements.

9. The detection method of a pressure-vacuum alternating tester according to claim 5, characterized in that: The step S7: stability test of alternating amplitude comprises the following steps: Step 1: Record the initial amplitude: After the alternating amplitude deviation test is completed, record the average amplitude of the alternator; Step 2: Isolate the standard: close the valve between the standard and the alternator, and continue to run the alternator; Step 3: Monitor changes: After every 10,000 runs, open the isolation valve to monitor the amplitude changes and verify whether the amplitude error meets the requirements. Repeat the test until 30,000 alternations are completed.

10. The detection method of a pressure-vacuum alternating tester according to claim 5, characterized in that: The step S8: alternating reliability test, comprises the following steps: Step 1: Record the number of alternations: After completing the 30,000 alternation tests, record the number of alternations of the alternator within 5 minutes and compare it with the data of the standard instrument; Step 2: Calculate the deviation: Calculate the deviation of the number of alternations and verify whether it is within the specified range; Step 3: Check the sealing: After the test, check the sealing of each interface of the AC machine to confirm whether the whole machine can work normally.

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