CN211737625U - Hydraulic valve test system - Google Patents
Hydraulic valve test system Download PDFInfo
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- CN211737625U CN211737625U CN202020393307.3U CN202020393307U CN211737625U CN 211737625 U CN211737625 U CN 211737625U CN 202020393307 U CN202020393307 U CN 202020393307U CN 211737625 U CN211737625 U CN 211737625U
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Abstract
The utility model provides a hydraulic valve test system relates to hydraulic pressure technical field. The hydraulic valve testing system comprises a pump, an overflow valve, a first reversing valve, a second reversing valve, a pressure sensor and a testing loop; the oil outlet of the pump is connected with a first pipeline and a second pipeline, the first pipeline is communicated with the overflow valve, the second pipeline is communicated with the first reversing valve, the overflow valve and the first reversing valve are both communicated with the second reversing valve, the second reversing valve is communicated with the test loop, and the pressure sensor is installed in the test loop. The utility model provides a hydrovalve test system has alleviated and has had the lower technical problem of detection precision when the same set of detecting system of sharing detects different valves among the prior art.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field especially relates to a hydrovalve test system.
Background
The hydraulic valve is an indispensable important hydraulic component for a hydraulic system of the engineering machinery, and with the increasing market competition, higher requirements are put forward on the performance of the hydraulic valve. Therefore, in manufacturing, performance testing of the hydraulic valve is necessary. Most of systems used for detecting the performance of the hydraulic valve at present can only detect one type of valve, namely one set of detection system deals with one type of valve, if the system is used for detecting other valves, the system needs to be additionally provided with a corresponding detection system, and the detection cost is high. If the valve detection system is used for detecting different valves, the detection precision is lower.
In view of the above, there is a need for a hydraulic valve testing system that can solve the above problems.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a hydraulic valve test system to there is the lower technical problem of detection precision when sharing same set detecting system detects different valves in alleviating prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a hydraulic valve test system, including pump, overflow valve, first switching-over valve, second switching-over valve, pressure sensor and test loop;
the oil outlet of the pump is connected with a first pipeline and a second pipeline, the first pipeline is communicated with the overflow valve, the second pipeline is communicated with the first reversing valve, the overflow valve and the first reversing valve are communicated with the second reversing valve, the second reversing valve is communicated with the test loop, and the pressure sensor is installed in the test loop.
In any of the above technical solutions, further, the relief valve includes a first relief valve and a second relief valve;
the first overflow valve and the second overflow valve are both arranged on the first pipeline, the first overflow valve is communicated with the second overflow valve, and the second overflow valve is arranged between the first overflow valve and the second reversing valve.
In any of the above technical solutions, further, the hydraulic valve testing system further includes a first check valve, the first check valve is installed at an oil outlet of the pump, and the oil outlet of the first check valve can be respectively communicated with the first pipeline and the second pipeline.
In any of the above technical solutions, further, the hydraulic valve testing system further includes a first filter, and the first filter is installed between the pump and the first check valve.
In any of the above technical solutions, further, the hydraulic valve testing system further includes a flow meter, the flow meter is installed in the testing loop, and the flow meter is communicated with the testing loop, and the flow meter is used for detecting a flow rate of the testing loop.
In any of the above technical solutions, further, the hydraulic valve testing system further includes a throttle valve, the throttle valve is communicated with the flow meter, and the throttle valve is communicated with the testing loop.
In any of the above technical solutions, further, the first relief valve and/or the throttle valve adopt an electro-proportional valve.
In any one of the above technical solutions, further, the hydraulic valve testing system further includes an oil tank, the oil tank is communicated with the pump, and the pump is used for conveying oil in the oil tank.
In any of the above technical solutions, further, the hydraulic valve testing system further includes a second filter, and the second filter is installed between the oil tank and the pump.
In any of the above technical solutions, further, the pump is a variable pump.
The utility model has the advantages that:
the utility model provides a pair of hydraulic valve test system, including pump, overflow valve, first switching-over valve, second switching-over valve, pressure sensor and test loop, the oil-out of pump is connected with first pipeline and second pipeline, and wherein first pipeline and overflow valve intercommunication, second pipeline and first switching-over valve intercommunication, and overflow valve and first switching-over valve all communicate with the second switching-over valve, and second switching-over valve and test loop intercommunication, pressure sensor install in test loop. During actual use, the working state of the overflow valve can be adapted to the working state of the first reversing valve and the working state of the second reversing valve by adjusting the valve core position of the first reversing valve, the valve core position of the second reversing valve and the valve core position of the overflow valve, and meanwhile, the pressure of the test loop is detected by using the pressure sensor, so that the pressure performance detection of different tested valves and the performance detection of the tested valves under different pressure states are realized, the detection precision is improved, and the detection cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a hydraulic valve testing system according to an embodiment of the present invention.
Icon: 10-a pump; 11-a first conduit; 12-a second conduit; 21-a first overflow valve; 22-a second relief valve; 30-a first reversing valve; 40-a second reversing valve; 51-a first pressure sensor; 52-a second pressure sensor; 60-oil tank; 70-a motor; 81-a first one-way valve; 82-a second one-way valve; 91-a first filter; 92-a second filter; 100-a third directional valve; 110-a throttle valve; 120-a flow meter; 131-a first valve under test; 132-a second valve under test; 133-third tested valve.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1, the hydraulic valve testing system provided by the present embodiment includes a pump 10, an overflow valve, a first direction valve 30, a second direction valve 40, a pressure sensor, and a testing loop; an oil outlet of the pump 10 is connected with a first pipeline 11 and a second pipeline 12, the first pipeline 11 is communicated with an overflow valve, the second pipeline 12 is communicated with a first reversing valve 30, the overflow valve and the first reversing valve 30 are both communicated with a second reversing valve 40, the second reversing valve 40 is communicated with a test loop, and a pressure sensor is installed on the test loop.
The hydraulic valve testing system in the embodiment is mainly used for detecting a hydraulic valve used in a hydraulic system, namely a tested valve, and the tested valve is installed on a testing loop. Wherein the valve under test can be: for convenience of description, the relief valve, the pressure reducing valve, or the flow valve will be described by taking the first measured valve 131, the second measured valve 132, and the third measured valve 133 as examples, and for example, the first measured valve 131 is a pressure reducing valve, the second measured valve 132 is a relief valve, and the third measured valve 133 is a throttle valve.
Wherein, the hydraulic valve testing system further comprises a motor 70, and the motor 70 provides power for the pump 10 to drive the pump 10 to work. The pump 10 is used for providing power for a hydraulic oil circuit formed by the hydraulic valve testing system, so that hydraulic oil can flow in the hydraulic oil circuit conveniently. The overflow valve is used for ensuring the stability of a pressure system in the hydraulic oil circuit, ensuring the safety of the hydraulic oil circuit and facilitating the adjustment of the pressure of the hydraulic oil circuit. The first reversing valve 30 is used for adjusting the on-off of the unloading oil path of the tested valve, and the second reversing valve 40 is used for adjusting the flowing direction of the hydraulic oil path. The first direction valve 30 and the second direction valve 40 each have a plurality of operating positions, and both adjustments are achieved by the direction of relative movement between the valve spool and the valve body. The pressure sensor is used for detecting the pressure of an oil inlet of the tested valve and the pressure of an oil outlet of the tested valve, so that the performance of the tested valve can be detected conveniently.
The oil outlet of the pump 10 is connected with a first pipeline 11 and a second pipeline 12, and the first pipeline 11 and the second pipeline 12 are arranged in parallel, that is, the first pipeline 11 and the second pipeline 12 are respectively communicated with the oil outlet of the pump 10. The overflow valve is arranged on the first pipeline 11, and the oil flowing out from the oil outlet of the overflow valve can flow into the oil inlet of the second reversing valve 40. The first direction valve 30 is disposed on the second pipeline 12, and the oil flowing out through the oil outlet of the first direction valve 30 can flow into the oil inlet of the second direction valve 40. The pressure sensor comprises a first pressure sensor 51 and a second pressure sensor 52, wherein the first pressure sensor 51 is mounted at the oil inlet of the tested valve, and the second pressure sensor 52 is mounted at the oil outlet of the tested valve.
The pressure unloading operation of the second pipeline 12 is adjusted by adjusting the valve core position of the first reversing valve 30, the oil path flow direction of the tested valve is adjusted by adjusting the valve core position of the second reversing valve 40, meanwhile, the overflow valve can ensure the pressure stability of a hydraulic oil path and also can adjust the pressure state of the hydraulic oil path, and the overflow valve is matched with the first reversing valve 30, the second reversing valve 40 and the pressure sensor, so that the pressure performance detection aiming at different tested valves and the performance detection aiming at different pressure states of the tested valves are realized, the detection precision is higher, an independent set of detection system adopted by the tested valve is not needed, and the detection cost is reduced. Moreover, the hydraulic valve testing system is simple in structure, clear in pipeline and convenient to install in a matching pipe.
With continued reference to fig. 1, the relief valves preferably include a first relief valve 21 and a second relief valve 22; the first overflow valve 21 and the second overflow valve 22 are both arranged on the first pipeline 11, the first overflow valve 21 is communicated with the second overflow valve 22, and the second overflow valve 22 is arranged between the first overflow valve 21 and the second reversing valve 40.
Specifically, the first relief valve 21 and the second relief valve 22 are arranged in series and are both arranged on the first pipeline 11. Wherein the first relief valve 21 serves as a safety valve to ensure safety of the pressure of the hydraulic oil line in the hydraulic valve detection system; the second relief valve 22 is used to regulate the pressure of the hydraulic valve sensing system to facilitate sensing of the valve under test.
With continued reference to FIG. 1, the hydraulic valve testing system preferably further includes a reservoir 60, the reservoir 60 being in communication with the pump 10, the pump 10 being configured to deliver oil from the reservoir 60.
Specifically, fluid storage is in oil tank 60, and the oil inlet of pump 10 communicates with oil tank 60, and pump 10 starts and can carry the fluid in oil tank 60 along hydraulic circuit to carry out the working property to the valve under test and detect.
In actual use, the hydraulic valve detection system has the following working conditions:
and (3) testing the pressure resistance: the motor 70 is powered to operate the pump 10 to deliver oil from the oil tank 60. At this time, the pressure of the second overflow valve 22 is adjusted to 1.5 times of the highest working pressure of the tested valve, and the whole oil circuit is kept for a certain time under the working condition, so that the pressure resistance of the tested valve is detected. If the pressure resistance of the tested valve is good, the pressure of the second overflow valve 22 cannot change, so that the pressure of the hydraulic oil circuit cannot change in a pressure maintaining state; if the pressure resistance of the tested valve is not qualified, the pressure of the second overflow valve 22 changes, and further the pressure of the whole hydraulic oil circuit changes.
Inlet pressure step corresponding test: the motor 70 is powered to operate the pump 10 to deliver oil from the oil tank 60. At this time, the pressure of the second relief valve 22 is adjusted to be the same as the pressure of the first relief valve 21, so that the second relief valve 22 and the first relief valve 21 function together as a relief valve to keep the pressure of the hydraulic oil path safe. After the hydraulic oil circuit works, the pressure state of the first reversing valve 30 is adjusted to judge the step of the inlet pressure of the tested valve, namely, the step test of the inlet pressure of the tested valve is realized.
Reverse pressure loss test: the motor 70 is powered to operate the pump 10 to deliver oil from the oil tank 60. And after the system to be tested normally works, the valve core of the second reversing valve 40 is adjusted to be in the working right position of the second reversing valve 40 to perform reversing, and meanwhile, the reverse pressure loss of the valve to be tested is detected through the first pressure sensor 51 and the second pressure sensor 52.
And (3) unloading pressure test: the unloading pressure test is mainly used for detecting the first tested valve 131 and the second tested valve 132, and the hydraulic valve test system further includes a third directional valve 100, and the first tested valve 131 and the second tested valve 132 are respectively communicated with the third directional valve 100. The motor 70 is powered to operate the pump 10 to deliver oil from the oil tank 60. And after the system to be tested normally works, the valve core of the third reversing valve 100 is adjusted to move to the working lower position of the third reversing valve 100, so that the pressure of the valve to be tested is reduced, and the unloading operation of the valve to be tested is realized. Meanwhile, the pressure of the oil inlet and the pressure of the oil outlet of the tested valve are detected by the first pressure sensor 51 and the second pressure sensor 52, and the difference between the pressure of the oil inlet of the tested valve and the pressure of the oil outlet of the tested valve is the unloading pressure.
The first overflow valve 21 is a direct-acting overflow valve, the second overflow valve 22 is a pilot-operated overflow valve, the first directional valve 30 is a two-position two-way electromagnetic directional valve, and the second directional valve 40 is a three-position four-way electromagnetic directional valve.
Preferably, the pump 10 is a variable pump 10, so that the flow rate of the test system can be adjusted according to the specification of different valves to be tested, and the test requirements can be met.
With continued reference to fig. 1, the hydraulic valve testing system preferably further includes a flow meter 120, the flow meter 120 is mounted on the testing circuit, and the flow meter 120 is in communication with the testing circuit, and the flow meter 120 is used for detecting the flow rate of the testing circuit.
In practical use, when the spool of the second direction valve 40 moves to the working right position, the flow meter 120 is located at the oil outlet of the tested valve, and can detect the oil flow flowing out through the oil outlet of the tested valve. When the spool of the second direction valve 40 moves to the working left position, the second direction valve 40 reverses the direction of the hydraulic oil path flowing to the tested valve, and the position of the flow meter 120 is the oil inlet of the tested valve, so as to detect the oil flow flowing into the oil inlet of the tested valve.
With continued reference to fig. 1, the hydraulic valve testing system preferably further includes a throttle valve 110, the throttle valve 110 being in communication with the flow meter 120, and the throttle valve 110 being in communication with the test circuit.
Specifically, the throttle valve 110 and the flow meter 120 are mounted on the same oil line and communicate with the valve under test in the test circuit. The throttle valve 110 is used to regulate the flow rate of the hydraulic oil path to form a back pressure in the hydraulic oil path, thereby improving the safety of the hydraulic oil path.
Preferably, the first relief valve 21 and the throttle valve 110 employ electro proportional valves. The electro proportional valve can generate corresponding action according to the condition of an input voltage signal, so that the valve core generates displacement, the valve core is adjusted, and the accuracy of regulation and control is improved.
It should be noted that, not limited to the above arrangement, an electro-proportional valve may be used only for the first relief valve 21 or only for the throttle valve 110. However, any method may be adopted as long as the first relief valve 21 and the throttle valve 110 can be controlled.
With continued reference to fig. 1, preferably, the hydraulic valve testing system further includes a first check valve 81, the first check valve 81 is installed at the oil outlet of the pump 10, and the oil outlet of the first check valve 81 can be respectively communicated with the first pipeline 11 and the second pipeline 12. The arrangement of the first check valve 81 is used to ensure that the hydraulic oil can only flow in the direction towards the first pipeline 11 and the second pipeline 12, so as to prevent the hydraulic oil from flowing back to the hydraulic pump 10 and causing damage to the hydraulic pump 10, thereby improving the safety of the pump 10 during operation.
In actual use, the hydraulic test system further includes a second check valve 82, the second check valve 82 being disposed on the second line 12 between the first directional valve 30 and the second directional valve 40. The second check valve 82 is arranged to ensure that the oil flowing to the second direction valve 40 through the first direction valve 30 does not flow back to the first direction valve 30, so as to realize the step regulation of the inlet pressure of the tested valve.
With continued reference to fig. 1, the hydraulic valve testing system preferably further includes a first filter 91, the first filter 91 being mounted between the pump 10 and the first check valve 81. The hydraulic valve testing system further includes a second filter 92, the second filter 92 being mounted between the oil tank 60 and the pump 10.
Wherein, the second filter 92 and the second filter 92 can be used for filtering out impurities in the oil liquid. In practical use, the second filter 92 is arranged at the oil inlet of the pump 10 to filter the oil flowing to the pump 10 through the oil tank 60 for the first time, so that impurities mixed in the oil are filtered, and the damage of the impurities to the pump 10 is reduced. Meanwhile, a first filter 91 is arranged at an oil outlet of the pump 10 to filter oil flowing out of the pump 10 for the second time, and impurities in the oil flowing out of the pump 10 are filtered out, so that damage of the impurities to various valve parts in a hydraulic oil way is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. The hydraulic valve test system is characterized by comprising a pump (10), an overflow valve, a first reversing valve (30), a second reversing valve (40), a pressure sensor and a test loop;
an oil outlet of the pump (10) is connected with a first pipeline (11) and a second pipeline (12), the first pipeline (11) is communicated with the overflow valve, the second pipeline (12) is communicated with the first reversing valve (30), the overflow valve and the first reversing valve (30) are communicated with the second reversing valve (40), the second reversing valve (40) is communicated with the test loop, and the pressure sensor is installed in the test loop.
2. The hydraulic valve testing system according to claim 1, wherein the relief valve comprises a first relief valve (21) and a second relief valve (22);
the first overflow valve (21) and the second overflow valve (22) are arranged on the first pipeline (11), the first overflow valve (21) is communicated with the second overflow valve (22), and the second overflow valve (22) is arranged between the first overflow valve (21) and the second reversing valve (40).
3. The hydraulic valve testing system according to claim 2, further comprising a first one-way valve (81), said first one-way valve (81) being mounted at an oil outlet of said pump (10), and an oil outlet of said first one-way valve (81) being communicable with said first and second pipelines (11, 12), respectively.
4. The hydraulic valve testing system of claim 3, further comprising a first filter (91), the first filter (91) being mounted between the pump (10) and the first check valve (81).
5. The hydraulic valve testing system of claim 2, further comprising a flow meter (120), the flow meter (120) being mounted to the test circuit and the flow meter (120) being in communication with the test circuit, the flow meter (120) being configured to sense a flow rate of the test circuit.
6. The hydraulic valve testing system of claim 5, further comprising a choke (110), the choke (110) in communication with the flow meter (120), and the choke (110) in communication with the test circuit.
7. The hydraulic valve testing system according to claim 6, characterized in that the first overflow valve (21) and/or the throttle valve (110) employ electro proportional valves.
8. The hydraulic valve testing system according to any of claims 1-7, further comprising a reservoir (60), the reservoir (60) being in communication with the pump (10), the pump (10) being adapted to deliver oil within the reservoir (60).
9. The hydraulic valve testing system of claim 8, further comprising a second filter (92), the second filter (92) being mounted between the oil tank (60) and the pump (10).
10. The hydraulic valve testing system according to any of claims 1-7, characterized in that the pump (10) is a variable pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020393307.3U CN211737625U (en) | 2020-03-25 | 2020-03-25 | Hydraulic valve test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020393307.3U CN211737625U (en) | 2020-03-25 | 2020-03-25 | Hydraulic valve test system |
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| CN211737625U true CN211737625U (en) | 2020-10-23 |
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| CN202020393307.3U Active CN211737625U (en) | 2020-03-25 | 2020-03-25 | Hydraulic valve test system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963407A (en) * | 2021-04-01 | 2021-06-15 | 北京天地玛珂电液控制系统有限公司 | System for testing pollution sensitivity of reversing valve |
| CN112963408A (en) * | 2021-04-01 | 2021-06-15 | 北京天地玛珂电液控制系统有限公司 | Method for testing pollution sensitivity of reversing valve |
| CN113233279A (en) * | 2021-04-16 | 2021-08-10 | 广东省特种设备检测研究院（广东省特种设备事故调查中心） | Speed limiting valve test device and test method |
-
2020
- 2020-03-25 CN CN202020393307.3U patent/CN211737625U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963407A (en) * | 2021-04-01 | 2021-06-15 | 北京天地玛珂电液控制系统有限公司 | System for testing pollution sensitivity of reversing valve |
| CN112963408A (en) * | 2021-04-01 | 2021-06-15 | 北京天地玛珂电液控制系统有限公司 | Method for testing pollution sensitivity of reversing valve |
| CN113233279A (en) * | 2021-04-16 | 2021-08-10 | 广东省特种设备检测研究院（广东省特种设备事故调查中心） | Speed limiting valve test device and test method |
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