CN216669180U - Wide-range high-efficiency liquid flow meter sealing performance test device - Google Patents
Wide-range high-efficiency liquid flow meter sealing performance test device Download PDFInfo
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- CN216669180U CN216669180U CN202220133107.3U CN202220133107U CN216669180U CN 216669180 U CN216669180 U CN 216669180U CN 202220133107 U CN202220133107 U CN 202220133107U CN 216669180 U CN216669180 U CN 216669180U
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- 238000007789 sealing Methods 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 238000011056 performance test Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims description 41
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000005056 compaction Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model relates to a large-range high-efficiency liquid flow instrument sealing performance test device, which comprises a detection pressure sensor, a variable frequency water pump, a water tank connected with the variable frequency water pump and a first sealing seat, wherein the detection pressure sensor is connected with the variable frequency water pump; the pressure retaining valve is arranged between the first sealing seat and the variable-frequency water pump; the second sealing seat is arranged opposite to the first sealing seat; the exhaust valve is arranged on the first sealing seat or the second sealing seat; the pressure relief valve is connected with the first sealing seat or the second sealing seat; the pressing device is connected with the second sealing seat or the first sealing seat; the touch screen controller is connected with the variable frequency water pump and the detection pressure sensor; the compressing device compresses a plurality of liquid flow meters connected in series between the first sealing seat and the second sealing seat; the detection pressure sensor is arranged on the first sealing seat or the second sealing seat and used for detecting the pressure in the liquid flow meter. The device detection range is big, extensive applicability, simple operation.
Description
Technical Field
The utility model relates to a flow meter testing device, in particular to a wide-range high-efficiency liquid flow meter sealing performance testing device.
Background
The liquid flow meters (hereinafter referred to as meters) are various in types and complex in use field environments, and besides the requirement for accurate metering, the most important point is that medium leakage caused by the problem of meter sealing performance cannot occur during use, the metering arrangement is inaccurate if the medium leakage problem occurs, and major safety accidents or environmental protection accidents are caused if the medium leakage problem occurs, so that each meter needs to be subjected to sealing test before being installed in a corresponding pipeline.
As the liquid flow meters are various in types, each meter has a corresponding verification rule, the verification rule requires a pressure-bearing test of 1 time or 1.6 times or 2 times and a tightness test of 1-30 minutes of pressure-bearing holding time according to the MAP (pressure grade) value of the meter, and the MAP (highest working pressure) of the liquid flow meters commonly comprises the following steps: 0.6MPa, 1.0MPa, 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa and the like; some instrument calibration protocols also require a combined test mode, i.e., a high pressure short time test followed by a low pressure long time test.
The existing instrument sealing performance test device has the following main defects:
1. the test pressure range switching process is troublesome, namely the test pressure is switched from low to high (or from high to low) by manual switching of a pressure source, and automatic switching cannot be realized;
2. the pressure value of the pressure source is not easy to be accurately controlled in the test process;
3. the control precision of the test pressure is poor, the existing tightness test device generally adopts a pressure switch two-bit control mode, and the actual value of the test pressure is easy to have larger deviation with the rule required value;
4. the operation is inconvenient, the test pressure value and the test time need to be set respectively, and the correlation cannot be realized.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a wide-range high-efficiency liquid flow instrument sealing performance test device which can adapt to different pressure grades and is convenient to operate, and the specific technical scheme is as follows:
a wide-range high-efficiency liquid flow meter sealing performance test device comprises a pressure sensor, a variable frequency water pump and a water tank connected with the variable frequency water pump, wherein the pressure sensor is used for detecting the pressure of a liquid in the water tank; further comprising: the first sealing seat is connected with the variable-frequency water pump; the pressure retaining valve is installed between the first sealing seat and the variable-frequency water pump; the second sealing seat is opposite to the first sealing seat; the exhaust valve is arranged on the first sealing seat or the second sealing seat; the pressure relief valve is connected with the first sealing seat or the second sealing seat; the pressing device is connected with the second sealing seat or the first sealing seat; the touch screen controller is connected with the variable-frequency water pump and the detection pressure sensor; the compressing device compresses a plurality of liquid flow meters connected in series between the first sealing seat and the second sealing seat; the pressure detection sensor is arranged on the first sealing seat or the second sealing seat and used for detecting the pressure in the liquid flow meter.
Preferably, the device further comprises a pressure boosting device, wherein the pressure boosting device comprises: the first pressure increasing valve is connected with the variable-frequency water pump; a booster cylinder mounted between the first booster valve and the first seal seat or the second seal seat; and a second booster valve installed between the first booster valve and the booster cylinder.
Preferably, the pressing device includes: a piston rod of the compaction cylinder is connected with the first sealing seat or the second sealing seat, and a compaction inlet of the compaction cylinder is connected with the variable frequency water pump; the first compression valve is installed between the compression inlet and the variable-frequency water pump and used for maintaining pressure; and the second compression valve is connected with the compression inlet and used for pressure relief.
Further, the device also comprises a pressing pressure sensor, wherein the pressing pressure sensor is arranged on the pressing inlet and used for detecting pressing force.
Further, still include resetting means, resetting means includes: the high-pressure air source is connected with the reset inlet of the compaction cylinder; a third pinch valve mounted between the high pressure gas source and the reset inlet; and the fourth compression valve is arranged on the reset inlet.
Preferably, the exhaust valve and the pressing device are both installed on the second sealing seat, and the pressure relief valve is installed on the first sealing seat.
Preferably, the pressure retaining valve, the exhaust valve and the pressure relief valve are pneumatic valves or electric valves and are all connected with the touch screen controller.
Preferably, the liquid flow meter also comprises a protective cover, and a plurality of liquid flow meters are all positioned in the protective cover for detection.
Compared with the prior art, the utility model has the following beneficial effects:
the wide-range high-efficiency liquid flow meter sealing performance test device provided by the utility model adjusts the rotating speed of the water pump by using the frequency converter to control the pressure output, so that the wide-range adjustment is realized, the adjustment is rapid, the manual intervention is not needed, the high-pressure test can be realized by the supercharger, the detection range is greatly improved, and the wide-range high-efficiency liquid flow meter sealing performance test device has the advantages of high automation degree, wide applicability and convenience in operation.
Drawings
Fig. 1 is a schematic structural diagram of a leak tightness test device of a large-range high-efficiency liquid flow meter.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
Example one
As shown in FIG. 1, a wide-range high-efficiency liquid flow meter tightness test device comprises a detection pressure sensor 34, a variable frequency water pump 1, a water tank 2, a first seal seat 41, a pressure retaining valve 31, a second seal seat 42, an exhaust valve 33, a pressure relief valve 32, a pressing device, a resetting device and a touch screen controller.
Wherein, frequency conversion water pump 1 is connected with water tank 2, and water tank 2's capacity is 200L, and water tank 2 can automatic water supply. A valve 11 is arranged between the variable frequency water pump 1 and the water tank 2. The maximum output pressure of the variable frequency water pump 1 is 1.6 MPa. Frequency conversion water pump 1 passes through the water pipe and is connected with first seal receptacle 41, and pressure retaining valve 31 installs between frequency conversion water pump 1 and first seal receptacle 41 for closed line when the pressurize. The pressure relief valve 32 is installed between the first seal seat 41 and the pressure retaining valve 31, and is released after the test is finished.
The first sealing seat 41 is fixed on the worktable and is a fixed seat, and the second sealing seat 42 is opposite to the first sealing seat 41. The detection pressure sensor 34 and the exhaust valve 33 are both mounted on the second sealing seat 42, the detection pressure sensor 34 is used for detecting the pressure in the liquid flow meter 9, the exhaust valve 33 is used for detecting the gas in the liquid flow meter 9 before being discharged, the influence of the gas on the water pressure is reduced, and therefore the accuracy and the reliability of the detection result are improved.
The pressing device comprises a pressing cylinder 6, a first pressing valve 51, a second pressing valve 52 and a pressing pressure sensor 53; the compacting cylinder 6 is fixed on the workbench, a piston rod of the compacting cylinder 6 is connected with the second sealing seat 42, a compacting inlet 61 of the compacting cylinder 6 is connected with the variable frequency water pump 1 through a first compacting valve 51 and a second compacting valve 52, the first compacting valve 51 is connected with the second compacting valve 52 in series, the first compacting valve 51 is used for maintaining pressure, and the second compacting valve 52 is used for releasing pressure. A pressing pressure sensor 53 is installed between the first pressing valve 51 and the second pressing valve 52, for detecting a pressing force of the second seal holder 42 pressing the liquid flow meter 9.
The resetting means comprises a high pressure air source 73, a third pinch valve 71 and a fourth pinch valve 72. The pressure of the high-pressure air source 73 is 0.6MPa, and the high-pressure air source 73 is connected with the reset inlet 62 of the pressing cylinder 6 through an air pipe; a third pinch valve 71 is mounted between the high pressure air source 73 and the reset inlet 62 for opening the air supply when reset. A fourth pinch valve 72 is mounted on the reset inlet 62 for venting during pinching.
And the touch screen controller is connected with the variable frequency water pump 1, the detection pressure sensor 34 and the compression pressure sensor 53 and is used for controlling the variable frequency water pump 1 according to the detected pressure so as to achieve the set pressure maintaining pressure and the pressure for compressing the liquid flow meter 9.
The liquid flow meter 9 is connected in series firstly and then is compressed between the first sealing seat 41 and the second sealing seat 42, so that the pressure detection is realized, a plurality of detections are carried out simultaneously, and the detection efficiency is greatly improved.
Due to the adoption of the variable-frequency water pump 1, the pressure detection range is large, and the pressure control is accurate.
For convenience of control and improvement of automation degree, the exhaust valve 33, the pressure retaining valve 31, the pressure relief valve 32, the first hold-down valve 51 and the second hold-down valve 52 are all pneumatic valves or electric valves and are connected with a touch screen controller.
In order to improve the security, still include the protection casing, protection casing one end is passed through the hinge mount on the workstation, and the other end passes through the hasp to be fixed on the workstation, and liquid flow instrument 9 is located the protection casing during the detection, and the security is high.
When the test is started, an operator confirms the tightness test pressure level and the corresponding holding time of the liquid flow meter 9 and inputs parameters on the touch screen controller. The liquid flow instrument 9 to be tested is connected in series on the workbench and is positioned between the first sealing seat 41 and the second sealing seat 42, then the variable frequency water pump 1 is started, the variable frequency water pump 1 provides power for the pressing cylinder 6, the first pressing valve 51 is opened, the second pressing valve 52 is closed, the third pressing valve 71 connected with the high-pressure air source 73 is closed, the fourth pressing valve 72 is opened for exhausting, and the pressure maintaining valve 31 and the pressure relief valve 32 are both closed. The pressure cylinder 6 presses the liquid flow meters 9 between the first seal seat 41 and the second seal seat 42, while closing the protection cover. The pressing pressure sensor 53 detects the pressing force, and when the set pressing force is reached, the first pressing valve 51 is closed to maintain a constant pressing force. Then, the exhaust valve 33 and the pressure retaining valve 31 are opened, the pressure relief valve 32 is closed, the variable frequency water pump 1 injects water into the liquid flow meter 9, air in the liquid flow meter 9 and the corresponding pipeline is exhausted, the exhaust valve 33 is closed after the exhaust is finished, and the pressure sensor 34 detects the pressure inside the liquid flow meter 9. When exhausting, the variable frequency water pump 1 runs at a lower frequency, after the exhausting is finished, the running frequency of the variable frequency water pump 1 is increased to enable the pressure of the liquid flow meter 9 to reach a set value, then the constant frequency is kept unchanged, and the pressure maintaining valve 31 is closed to enter a pressure maintaining stage. And in the pressure maintaining stage, the pressure maintaining process is automatically monitored by the touch screen controller. And when the set pressure maintaining time is reached, opening the pressure relief valve 32 and the exhaust valve 33 in sequence, emptying the pipeline and the water in the liquid flow meter 9, then opening the protective cover, taking out the liquid flow meter 9, and completing the test.
The testing method is a low-pressure test, the testing pressure is not higher than the lift of the water pump, and the variable-frequency water pump 1 is directly used for pressurizing.
Example two
On the basis of the first embodiment, as shown in fig. 1, the variable frequency water pump further comprises a pressure increasing device, wherein the pressure increasing device comprises a first pressure increasing valve 82 and a pressure increasing cylinder 81, and the first pressure increasing valve 82 is connected with the variable frequency water pump 1; the pressurizing cylinder 81 is installed between the first pressurizing valve 82 and the first seal holder 41. A second pressure increasing valve 83 is arranged between the first pressure increasing valve 82 and the pressure increasing cylinder 81, the first pressure increasing valve 82 is used for controlling the opening and closing of the pressure increasing cylinder 81, and the second pressure increasing valve 83 is used for pressure relief of the pressure increasing cylinder 81. The maximum pressure of the pressurizing cylinder 81 is 8 MPa.
The frequency conversion water pump 1 and the pressure cylinder 81 are combined to provide high pressure, and the test pressure is higher than the lift of the water pump. The output pressure of the variable frequency water pump 1 is added to the input end of the pressure cylinder 81, and the pressure is amplified by the pressure cylinder 81 and then input into the liquid flow instrument 9. The procedure of clamping and venting during the test was the same as that of example one, while pressurizing: the first pressure increasing valve 82 is opened, the second pressure increasing valve 83 is closed, the variable frequency water pump 1 increases pressure from low to high, when the set pressure is reached, the frequency of the variable frequency water pump 1 is kept unchanged, the first pressure increasing valve 82 is closed to enter a pressure maintaining stage, and then the variable frequency water pump 1 is closed. And in the pressure maintaining stage, the pressure maintaining process is automatically monitored by the touch screen controller. When the set pressure maintaining time is reached, the second pressure increasing valve 83 is opened, the pressure relief valve 32 and the exhaust valve 33 are opened in sequence after the time delay of 10s, the water in the pipeline and the liquid flow meter 9 is drained, then the protective cover is opened, the liquid flow meter 9 is taken out, and the test is completed.
In the pressure maintaining process, whether a leakage phenomenon exists is judged according to the detection value of the detection pressure sensor 34, and if the leakage phenomenon exists, an alarm is given through a touch screen controller, an alarm lamp or a buzzer. If the test is qualified, the pressure is automatically relieved, the water is drained, the surface is loosened, the protective cover is opened, and the test is finished at one time.
A wide-range high-efficiency liquid flow instrument sealing performance test device has the following advantages:
1. the pressure source pressure value range is wide, the pressurization process is controlled smoothly, safely, accurately and efficiently by adopting the variable frequency water pump, and the test pressure range is increased by adopting the pressure collection pressurization cylinder;
2. the automation degree is high, the operation is simple, and the test pressure and the test time can be selected once according to the calibration rule of the corresponding instrument or can be independently set according to the actual requirement;
3. the pressure control in the test process is accurate, the pressure source is directly adjusted in a low-pressure test area by adopting a frequency mode of controlling the variable-frequency water pump, the pressure of a tested instrument is measured by using a high-precision pressure sensor, and the rotating speed of the variable-frequency water pump is accurately controlled to a required set value by the touch screen controller according to the measured value of the pressure sensor;
4. the pressure curve and other necessary process parameters of the whole test process are recorded in real time.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (8)
1. A wide-range high-efficiency liquid flow meter sealing performance test device comprises a pressure sensor, a variable frequency water pump and a water tank connected with the variable frequency water pump, wherein the pressure sensor is used for detecting the pressure of a liquid in the water tank; it is characterized by also comprising:
the first sealing seat is connected with the variable-frequency water pump;
the pressure retaining valve is installed between the first sealing seat and the variable-frequency water pump;
the second sealing seat is opposite to the first sealing seat;
the exhaust valve is arranged on the first sealing seat or the second sealing seat;
the pressure relief valve is connected with the first sealing seat or the second sealing seat;
the pressing device is connected with the second sealing seat or the first sealing seat; and
the touch screen controller is connected with the variable frequency water pump and the detection pressure sensor;
the compressing device compresses a plurality of liquid flow meters connected in series between the first sealing seat and the second sealing seat; the pressure detection sensor is arranged on the first sealing seat or the second sealing seat and used for detecting the pressure in the liquid flow meter.
2. The wide range high efficiency liquid flow meter leak test apparatus of claim 1, further comprising a pressure boosting device, said pressure boosting device comprising:
the first pressure increasing valve is connected with the variable-frequency water pump;
a booster cylinder mounted between the first booster valve and the first seal seat or the second seal seat; and
a second booster valve mounted between the first booster valve and the booster cylinder.
3. The wide range high efficiency liquid flow meter sealing test apparatus of claim 1, wherein said compression means comprises:
a piston rod of the compaction cylinder is connected with the first sealing seat or the second sealing seat, and a compaction inlet of the compaction cylinder is connected with the variable frequency water pump;
the first compression valve is arranged between the compression inlet and the variable-frequency water pump and used for maintaining pressure; and
and the second compression valve is connected with the compression inlet and used for pressure relief.
4. The wide range high efficiency liquid flow meter leak test apparatus of claim 3, further comprising a compression pressure sensor mounted on said compression inlet for detecting compression force.
5. The wide-range high-efficiency liquid flow meter sealing performance test device according to claim 3, further comprising a resetting device, wherein the resetting device comprises:
the high-pressure air source is connected with the reset inlet of the compaction cylinder;
a third pinch valve mounted between the high pressure gas source and the reset inlet; and
a fourth pinch valve mounted on the reset inlet.
6. The wide range high efficiency liquid flow meter leak testing apparatus of claim 1, wherein said vent valve and said hold down are both mounted on said second seal mount and said pressure relief valve is mounted on said first seal mount.
7. The wide-range high-efficiency liquid flow meter sealing performance test device according to any one of claims 1 to 6, wherein the pressure retaining valve, the exhaust valve and the pressure relief valve are all pneumatic valves or electric valves and are all connected with the touch screen controller.
8. The wide-range high-efficiency liquid flow meter sealing performance test device according to any one of claims 1 to 6, further comprising a protective cover, wherein a plurality of the liquid flow meters are all located in the protective cover for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133107.3U CN216669180U (en) | 2022-01-18 | 2022-01-18 | Wide-range high-efficiency liquid flow meter sealing performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133107.3U CN216669180U (en) | 2022-01-18 | 2022-01-18 | Wide-range high-efficiency liquid flow meter sealing performance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216669180U true CN216669180U (en) | 2022-06-03 |
Family
ID=81761146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220133107.3U Expired - Fee Related CN216669180U (en) | 2022-01-18 | 2022-01-18 | Wide-range high-efficiency liquid flow meter sealing performance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216669180U (en) |
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2022
- 2022-01-18 CN CN202220133107.3U patent/CN216669180U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220603 |
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| CF01 | Termination of patent right due to non-payment of annual fee |