CN210719591U - Quick and high-precision detection device for small internal leakage of hydraulic valve - Google Patents
Quick and high-precision detection device for small internal leakage of hydraulic valve Download PDFInfo
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- CN210719591U CN210719591U CN201922147327.2U CN201922147327U CN210719591U CN 210719591 U CN210719591 U CN 210719591U CN 201922147327 U CN201922147327 U CN 201922147327U CN 210719591 U CN210719591 U CN 210719591U
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- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 239000003921 oil Substances 0.000 claims abstract description 45
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 15
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013522 software testing Methods 0.000 description 1
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Abstract
The utility model provides a quick, the high accuracy detection device of small internal leakage of hydrovalve. The device comprises an oil supply unit and a detection circuit; the oil supply unit is connected with the detection loop through a reversing valve; the oil supply unit supplies hydraulic oil to the detection loop; the detection loop comprises a check valve, a first pressure sensor, a first pressure gauge, a closed container, a stop valve and a tested hydraulic valve which are sequentially connected in series; the check valve is connected with a first working oil port of the reversing valve, and the tested hydraulic valve is connected with a second working oil port of the reversing valve. The utility model has the advantages of less hydraulic components, simple structure and high testing efficiency; the stop valves are arranged on the tested hydraulic valve and the closed container, the internal leakage pressure drop of the device can be detected by closing the stop valves, the pressure drop caused by the internal leakage of the device is eliminated by the final detection result, the system error is eliminated, and the detection precision is improved.
Description
Technical Field
The utility model relates to a hydraulic pressure detects technical field, concretely relates to quick, the high accuracy detection device of small internal leakage of hydrovalve.
Background
If the pressure drop value of the hydraulic valve is to be accurately determined, internal leakage at the joint of the hydraulic test bed and the pressure test joint needs to be eliminated firstly, but the internal leakage of the hydraulic test bed and the pressure test joint cannot be completely eliminated in actual work. Therefore, before the hydraulic valve internal leakage test is performed, the internal leakage at the joint of the hydraulic test bed and the pressure test joint needs to be detected. And after the internal leakage pressure drop value at the joint of the hydraulic test bed and the pressure test joint is determined, performing internal leakage test on the hydraulic valve. The prior art mainly adopts a measuring cup and a stopwatch mode, and has the defects of low detection efficiency, low precision and the like.
In summary, a quick and high-precision detection device for the tiny internal leakage of a hydraulic valve is urgently needed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a small internal leakage of hydrovalve is quick, high accuracy detection device to solve the detection problem of hydrovalve internal leakage.
In order to achieve the purpose, the utility model provides a quick and high-precision detection device for the tiny internal leakage of a hydraulic valve, which comprises an oil supply unit and a detection loop; the oil supply unit is connected with the detection loop through a reversing valve; the oil supply unit supplies hydraulic oil to the detection loop;
the detection loop comprises a check valve, a first pressure sensor, a first pressure gauge, a closed container, a stop valve and a tested hydraulic valve which are sequentially connected in series; the check valve is connected with a first working oil port of the reversing valve, and the tested hydraulic valve is connected with a second working oil port of the reversing valve.
Furthermore, an electromagnetic ball valve is arranged on an oil path of a second working oil port of the tested hydraulic valve and the reversing valve, and the electromagnetic ball valve returns oil to an oil tank for unloading pressure on the oil path.
Furthermore, a second pressure gauge and a second pressure sensor are arranged on an oil path between the tested hydraulic valve and the electromagnetic ball valve; for reading and detecting the pressure on the oil circuit.
Further, the reversing valve is a three-position four-way electromagnetic reversing valve.
Further, the check valve is a hydraulic control check valve.
Further, the stop valve is a high-pressure stop valve.
Use the technical scheme of the utility model, following beneficial effect has:
the utility model relates to a quick, high accuracy detection device of small internal leakage of hydraulic valve adopts hydraulic component few, simple structure, and efficiency of software testing is high. The stop valves are arranged on the tested hydraulic valve and the closed container, the internal leakage pressure drop of the device can be detected by closing the stop valves, the pressure drop caused by the internal leakage of the device is eliminated by the final detection result, the system error is eliminated, and the detection precision is improved.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic view of a detection device;
the device comprises a reversing valve 1, a one-way valve 2, a first pressure sensor 3, a first pressure gauge 4, a first pressure gauge 5, a closed container 6, a stop valve 7, a tested hydraulic valve 8, an electromagnetic ball valve 9, a second pressure gauge 10 and a second pressure sensor.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1, a quick and high-precision detection device for tiny internal leakage of a hydraulic valve comprises an oil supply unit and a detection loop; the oil supply unit is connected with the detection loop through the reversing valve 1; an oil supply unit (not shown) supplies hydraulic oil to the detection circuit;
the detection loop comprises a check valve 2, a first pressure sensor 3, a first pressure gauge 4, a closed container 5, a stop valve 6 and a tested hydraulic valve 7 which are sequentially connected in series; the check valve 2 is connected with a first working oil port of the reversing valve 1, and the tested hydraulic valve 7 is connected with a second working oil port of the reversing valve 1.
And the oil paths of the tested hydraulic valve 7 and the second working oil port of the reversing valve 1 are provided with electromagnetic ball valves 8, and the electromagnetic ball valves 8 return oil to an oil tank for unloading the pressure on the oil paths.
A second pressure gauge 9 and a second pressure sensor 10 are arranged on an oil path between the tested hydraulic valve 7 and the electromagnetic ball valve 8; for reading and detecting the pressure on the oil circuit.
The working principle of the quick and high-precision detection device for the tiny internal leakage of the hydraulic valve is as follows:
pressure drop Δ p due to internal leakage of hydraulic valve 7 to be tested2The mathematical expression of (a) is as follows:
wherein K represents the elastic modulus (MPa) of hydraulic oil; v represents the oil volume (L); Δ p represents the pressure increase (MPa); Δ V represents the oil leakage (L/min); t represents time (min).
In addition, in order to eliminate the internal leakage of the pressure test system (including the joint of the pressure test joint), the pressure drop of the internal leakage of the test bed system of the detection device for the closed container 5 is delta p1Then the mathematical expression for the total pressure drop tested is as follows:
the amount of leakage in the tested hydraulic valve 7:
in this embodiment, the closed container 5 is a container with a known volume, and assuming that the volume is V, the specified pressure is 25 MPa; the reversing valve 1 is a three-position four-way electromagnetic reversing valve. The check valve 2 is a hydraulic control check valve. The stop valve 6 is a high-pressure stop valve.
Leakage pressure drop delta p in test bed system of detection device1That is, the pressure drop between the check valve 2 and the stop valve 6, the hydraulic oil is introduced into the tested hydraulic valve 7 through the reversing valve 1, the pressure in the closed container is adjusted to the designated pressure, the stop valve 6 is closed, the reversing valve 1 is adjusted to the middle position, the electromagnetic ball valve 8 is reversed and unloaded, the reading of the second pressure sensor 10 is 0, at the moment, the oil in the closed container 5 is sealed by the check valve 2 and the stop valve 6, the pressure value is read through the first pressure sensor 3, and the pressure drop delta p in the time t can be obtained1。
When measuring delta p, firstly, hydraulic oil is led into the tested hydraulic valve 7 through the reversing valve 1, then the reversing valve 1 is adjusted to the middle position, the stop valve 6 is opened, the electromagnetic ball valve 8 is reversed and unloaded, the reading of the second pressure sensor 10 is 0, oil in the closed container 5 is closed by the check valve 2 and the tested hydraulic valve 7, and the pressure value is read through the first pressure sensor 3, so that the pressure drop delta p in t time can be obtained. And finally, calculating the internal leakage delta V of the hydraulic cylinder according to the formula (3).
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A quick and high-precision detection device for tiny internal leakage of a hydraulic valve is characterized by comprising an oil supply unit and a detection loop; the oil supply unit is connected with the detection loop through the reversing valve (1); the oil supply unit supplies hydraulic oil to the detection loop;
the detection loop comprises a check valve (2), a first pressure sensor (3), a first pressure gauge (4), a closed container (5), a stop valve (6) and a tested hydraulic valve (7) which are sequentially connected in series; the check valve (2) is connected with a first working oil port of the reversing valve (1), and the tested hydraulic valve (7) is connected with a second working oil port of the reversing valve (1).
2. The device for rapidly and accurately detecting the tiny internal leakage of the hydraulic valve according to claim 1, wherein an electromagnetic ball valve (8) is arranged on an oil path of the tested hydraulic valve (7) and the second working oil port of the reversing valve (1), and the electromagnetic ball valve (8) returns oil to an oil tank for unloading the pressure on the oil path.
3. The device for quickly and accurately detecting the tiny internal leakage of the hydraulic valve according to claim 2, wherein a second pressure gauge (9) and a second pressure sensor (10) are arranged on an oil path between the tested hydraulic valve (7) and the electromagnetic ball valve (8); for reading and detecting the pressure on the oil circuit.
4. The device for quickly and accurately detecting the tiny internal leakage of the hydraulic valve according to claim 1, wherein the reversing valve (1) is a three-position four-way electromagnetic reversing valve.
5. The device for rapidly and accurately detecting the tiny internal leakage of the hydraulic valve as claimed in claim 1, wherein the check valve (2) is a hydraulic control check valve.
6. The device for rapidly and accurately detecting the tiny internal leakage of the hydraulic valve as claimed in claim 1, wherein the stop valve (6) is a high-pressure stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147327.2U CN210719591U (en) | 2019-12-04 | 2019-12-04 | Quick and high-precision detection device for small internal leakage of hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147327.2U CN210719591U (en) | 2019-12-04 | 2019-12-04 | Quick and high-precision detection device for small internal leakage of hydraulic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210719591U true CN210719591U (en) | 2020-06-09 |
Family
ID=70963803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922147327.2U Expired - Fee Related CN210719591U (en) | 2019-12-04 | 2019-12-04 | Quick and high-precision detection device for small internal leakage of hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210719591U (en) |
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2019
- 2019-12-04 CN CN201922147327.2U patent/CN210719591U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 |
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| CF01 | Termination of patent right due to non-payment of annual fee |