CN216788841U - Test device and test system - Google Patents

Abstract

The application discloses testing arrangement and test system, testing arrangement includes the hydraulic pressure station, switching-over valve and transfusion pipeline subassembly, the hydraulic pressure station includes power part, the switching-over valve sets up in power part's low reaches, the switching-over valve includes the inlet, return the liquid mouth, first interface and second interface, the transfusion pipeline subassembly includes into the liquid pipeline, first liquid return pipeline, first pipeline and second pipeline, power part and inlet are connected to the liquid inlet pipeline, first liquid return pipeline connects between liquid return mouth and hydraulic pressure station, first interface is connected to the one end of first pipeline, the second interface is connected to the one end of second pipeline, be provided with first manometer and first stop valve on the first pipeline, be provided with second manometer and second stop valve on the second pipeline. The hydraulic component can be detected according to the actual use working condition of the hydraulic component, the detection accuracy is high, the factory pass rate of each hydraulic component can be ensured, and the frequency of oil leakage faults during field operation of a hydraulic system is reduced.

Description

Test device and test system

Technical Field

The application relates to the technical field of wind power generation, in particular to a testing device and a testing system.

Background

The hydraulic pitch control system, the yaw locking system and the like are important components of the wind generating set, for example, the hydraulic pitch control system can be used for adjusting the aerodynamic force acquired by the wind generating set, so that the wind generating set outputs the designed output power.

At present, each part of a hydraulic pitch control system and the like cannot be effectively detected when leaving a factory, so that oil leakage faults frequently occur when the hydraulic pitch control system runs on site after leaving the factory, and the disassembly, assembly and repair working hours and the site operation and maintenance cost are greatly increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a testing arrangement and test system detects hydraulic pressure part according to the in-service use operating mode of hydraulic pressure part, and detection accuracy is higher, can ensure the qualification rate that dispatches from the factory of each hydraulic pressure part, reduces the frequency that the oil leak trouble appears when hydraulic system field operation.

In a first aspect, an embodiment of the present application provides a testing apparatus for a pressure holding test of a hydraulic component, including: the hydraulic station comprises a power component, a signal processing unit and a signal processing unit, wherein the power component is used for providing liquid for a hydraulic component to be tested; the reversing valve is arranged at the downstream of the power component and comprises a liquid inlet, a liquid return port, a first interface and a second interface, the reversing valve has a first state and a second state, the liquid inlet is communicated with the first interface, the liquid return port is communicated with the second interface, the liquid inlet is communicated with the second interface, and the liquid return port is communicated with the first interface; transfusion pipeline subassembly, including liquid inlet pipeline, first liquid return pipeline, first pipeline and second pipeline, the feed liquor pipe connection power part with the inlet, first liquid return pipe connection in return the liquid mouth with between the hydraulic pressure station, the one end of first pipeline is connected first interface, the one end of second pipeline is connected the second interface, the other end of first pipeline with the other end of second pipeline all is used for connecting the examination hydraulic pressure part that awaits measuring, be provided with first manometer and first stop valve on the first pipeline, be provided with second manometer and second stop valve on the second pipeline, it is right to await measuring hydraulic pressure part carries out the pressurize test.

According to the aforesaid embodiment of the first aspect of the present application, still include the energy storage subassembly, the energy storage subassembly includes the accumulator, the accumulator passes through energy storage pipeline with the feed liquor pipeline intercommunication.

According to any one of the embodiments of the first aspect of the present application, the energy storage pipeline is provided with a third pressure gauge, and the power component is configured to be opened when the pressure of the energy storage pipeline is smaller than a first preset value and closed when the pressure of the energy storage pipeline reaches a second preset value.

According to any one of the preceding embodiments of the first aspect of the application, the energy storage line is provided with a pressure gauge for displaying the pressure of the energy storage line.

According to any one of the embodiments of the first aspect of the present application, a third stop valve and a first check valve are arranged on the energy storage pipeline, the third stop valve and the first check valve are arranged in parallel, and the first check valve allows liquid to flow from the energy storage pipeline into the energy accumulator.

According to any one of the preceding embodiments of the first aspect of the application, the energy storage assembly further comprises an energy storage pressure release pipeline, the energy storage pressure release pipeline is communicated with the energy storage pipeline and the first liquid return pipeline, and an energy storage pressure release stop valve is arranged on the energy storage pressure release pipeline.

According to any one of the embodiments of the first aspect of the present application, the infusion pipeline assembly further includes a second return pipeline, one end of the second return pipeline is communicated with the first return pipeline, and the other end of the second return pipeline is used for connecting the return outlet of the to-be-tested hydraulic component.

According to any one of the above embodiments of the first aspect of the present application, the infusion pipeline assembly further includes a liquid drainage pipeline, one end of the liquid drainage pipeline is communicated with the first liquid return pipeline, and the other end of the liquid drainage pipeline is used for connecting the liquid drainage outlet of the to-be-tested hydraulic component.

According to any of the preceding embodiments of the first aspect of the present application, a return filter is arranged on the first return line to filter liquid flowing back to the hydraulic station.

In accordance with any one of the preceding embodiments of the first aspect of the present application, the return filter is disposed downstream of the second return line and the drain line.

In accordance with any one of the preceding embodiments of the first aspect of the present application, a radiator is provided on the first return line to cool the liquid flowing back to the hydraulic station.

In accordance with any of the preceding embodiments of the first aspect of the present application, the radiator is arranged downstream of the second return line and the drain line.

According to any one of the preceding embodiments of the first aspect of the present application, a feed filter is disposed on the feed line to filter liquid entering the reversing valve and the hydraulic component to be tested.

According to any one of the embodiments of the first aspect of the present application, the other end of the first pipeline, the other end of the second liquid return pipeline, and the other end of the liquid discharge pipeline are provided with quick-change connectors.

According to any one of the foregoing embodiments of the first aspect of the present application, the infusion pipeline assembly further includes a first overflow pipeline, the first overflow pipeline is communicated with the liquid inlet pipeline, and a first overflow valve is disposed on the first overflow pipeline.

According to any one of the foregoing embodiments of the first aspect of the present application, the energy storage assembly further includes a second overflow pipeline, the second overflow pipeline is communicated with the energy storage pipeline, and a second overflow valve is disposed on the second overflow pipeline;

in accordance with any of the preceding embodiments of the first aspect of the present application, the testing device further comprises a first pressure tap disposed in the first conduit downstream of the first shut-off valve.

According to any of the preceding embodiments of the first aspect of the present application, the testing device further comprises a second pressure tap arranged in the second pipeline downstream of the second shut-off valve.

According to any one of the preceding embodiments of the first aspect of the present application, the testing device further comprises a third pressure tap, which is arranged in the energy storage pipeline.

According to any one of the preceding embodiments of the first aspect of the present application, the transfusion pipeline assembly further includes a liquid inlet pressure relief pipeline, the liquid inlet pressure relief pipeline communicates the liquid inlet pipeline with the hydraulic station, a liquid inlet pressure relief valve is provided on the liquid inlet pressure relief pipeline, the liquid inlet pressure relief valve is configured to be in the operation of the hydraulic part to be tested and the pressure in the liquid inlet pipeline is greater than the second preset value, and is opened and closed when being reduced to the first preset value.

According to any one of the embodiments of the first aspect of the present application, the hydraulic station further includes a liquid storage tank for storing liquid, and both the liquid inlet of the power component and the first liquid return pipeline are communicated with the liquid storage tank; the tank is provided with a liquid level detector configured to be triggered when the level of liquid in the tank is below a preset threshold.

In accordance with any one of the preceding embodiments of the first aspect of the present application, the tank has a vent where an air filter is provided to filter air entering the tank.

In accordance with any one of the preceding embodiments of the first aspect of the present application, the tank is further provided with a level gauge to facilitate viewing of the level of liquid in the tank.

According to any one of the preceding embodiments of the first aspect of the present application, the tank is further provided with a temperature sensor for measuring the temperature of the liquid in the tank.

According to any one of the preceding embodiments of the first aspect of the present application, the testing device further comprises a cleanliness sensor, and the cleanliness sensor is connected with the first liquid return pipeline through a fifth stop valve.

According to any one of the preceding embodiments of the first aspect of the present application, the infusion pipeline assembly is integrated in a valve block, and the reversing valve, the power component, the first pressure detector, the first stop valve, the second pressure detector and the second stop valve are installed on the valve block and communicated with the corresponding infusion pipeline through an installation interface on the valve block.

In a second aspect, an embodiment of the present application provides a test system for a holding pressure test of a hydraulic component, including: a testing device as described in any of the previous embodiments; the control cabinet comprises a controller and a display panel, and the controller is used for controlling the power component and the reversing valve to work; and the mounting bracket is used for mounting the hydraulic part to be tested.

In accordance with the foregoing embodiment of the second aspect of the present application, the test system further comprises a screen, the control cabinet being located on one side of the screen, the test device and the mounting bracket being located on the other side of the screen.

According to any of the preceding embodiments of the second aspect of the present application, the mounting bracket comprises at least one of a hydraulic cylinder bracket, a blade lock bracket, an accumulator assembly bracket, and an electro-hydraulic slip ring bracket.

The test device and the test system provided by the embodiment of the application, the test device comprises a hydraulic station, a reversing valve and a transfusion pipeline assembly, the hydraulic station comprises a power part, the other end of a first pipeline and/or the other end of a second pipeline of the transfusion pipeline assembly are/is connected to a hydraulic part to be tested, high-pressure liquid is provided through the power part, the high-pressure liquid is input to the hydraulic part to be tested through the reversing valve, the hydraulic part performs functional action to realize functional action test, the high-pressure liquid is input to the hydraulic part to be tested through the reversing valve through the power part, then the first stop valve and the second stop valve are closed, pressure change in the hydraulic part is monitored through the first pressure detector and the second pressure detector, the internal leakage detection of the hydraulic part is realized, in the process, whether external leakage exists in the hydraulic part can be judged by observing the outer surface of the hydraulic part, namely, the external leakage detection of the hydraulic component is realized.

To sum up, the testing device and the testing system of the embodiment of the application can perform functional action testing, internal leakage detection and external leakage detection on the hydraulic component according to the actual use working condition of the hydraulic component, have high detection accuracy, can ensure the factory pass rate of each hydraulic component, and reduce the frequency of oil leakage faults during the field operation of the hydraulic system.

Drawings

Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

Fig. 1 is a schematic structural diagram of a test system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a testing apparatus according to an embodiment of the present application.

Description of reference numerals:

100-a test device;

101-a liquid storage tank; 102-a power component; 103-a reversing valve; 104-an accumulator;

201-liquid inlet pipeline; 202-a first return line; 203-a first conduit; 204-a second conduit; 205-a second return line; 206-liquid discharge line; 207-liquid inlet pressure relief pipeline; 208-an energy storage pipeline; 209-energy storage and pressure release pipeline;

301-a first shut-off valve; 302-a second stop valve; 303-a third stop valve; 304-a first one-way valve; 305-a fourth stop valve; 306-a fifth stop valve; 307-energy storage stop valve; 308-energy storage pressure relief stop valve; 309-a first overflow valve; 310-a second excess flow valve; 311-liquid inlet pressure relief valve; 312-a second one-way valve; 313-a fifth stop valve; 314-a third one-way valve;

401-a first voltage detector; 402-a second voltage detector; 403-a third pressure gauge; 404-pressure gauge;

501-a liquid level detector; 502-an air filter; 503-a liquid level meter; 504-temperature sensor; 505-a cleanliness sensor; 506-liquid inlet filter; 507-a liquid return filter; 508-a heat sink;

601-quick change coupler; 602-a first pressure tap; 603-a second pressure tap; 604-a third pressure tap; 605-high pressure hose; a fourth pressure tap 606;

200-a control cabinet;

300-mounting a bracket; 310-hydraulic cylinder support; 320-an accumulator assembly holder; 330-electrohydraulic slip ring support;

400-screen;

001-hydraulic cylinder; 002-blade lock; 003-an accumulator assembly; 004-electro-hydraulic slip ring.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

For better understanding of the present application, the following describes the testing device and the testing system in detail with reference to fig. 1 to 2.

The hydraulic pitch control system, the yaw locking system and the like are important components of the wind generating set, but each component of the hydraulic pitch control system and the like cannot be effectively detected when leaving the factory, so that oil leakage faults frequently occur when the hydraulic pitch control system is operated on site after leaving the factory, and the dismounting and repairing time and the site operation and maintenance cost are greatly increased.

Based on the above problems, the embodiment of the application provides a testing device and a testing system, which can detect hydraulic parts according to actual use conditions of the hydraulic parts, can improve detection quality, ensure the delivery qualification rate of each hydraulic part, and reduce the frequency of oil leakage faults when the hydraulic system operates on site.

Fig. 1 is a schematic structural diagram of a test system according to an embodiment of the present application.

The test system that this application embodiment provided, a pressurize test for hydraulic pressure part, this test system includes testing arrangement 100, switch board 200 and installing support 300, installing support 300 is used for installing the hydraulic pressure part that awaits measuring, switch board 200 includes controller and display panel, can control testing arrangement 100 work through the controller, utilize testing arrangement 100 can detect hydraulic pressure part according to the in-service use operating mode of hydraulic pressure part, can improve detection quality, ensure the qualification rate that dispatches from the factory of each hydraulic pressure part, the frequency that oil leak trouble appears when reducing hydraulic system field operation.

The hydraulic parts to be tested are various, the hydraulic parts to be tested can be at least one of a hydraulic cylinder, a blade lock, an energy accumulator assembly and an electro-hydraulic slip ring, and in order to facilitate installation of the hydraulic parts to be tested, optionally, the mounting bracket 300 can include at least one of a hydraulic cylinder bracket 310, a blade lock bracket, an energy accumulator assembly bracket 320 and an electro-hydraulic slip ring bracket 330, the hydraulic cylinder bracket 310 is used for placing the hydraulic cylinder, the blade lock bracket is used for installing the blade lock, the energy accumulator bracket is used for installing the energy accumulator, and the electro-hydraulic slip ring bracket 330 is used for installing the electro-hydraulic slip ring. When the pressure maintaining test is carried out on the hydraulic component to be tested, the hydraulic component is installed on the corresponding support, and the test device is simple and convenient.

In some optional embodiments, the test system of the present application may further include a screen 400, the control cabinet 200 may be located on one side of the screen 400, and the test device 100 and the mounting bracket 300 are located on the other side of the screen 400. The control cabinet 200, the mounting bracket 300 and the testing device 100 are arranged on two sides of the screen 400, so that the control cabinet 200, the hydraulic part to be tested and the testing device 100 are respectively arranged on two sides of the screen 400 during testing, the testing device 100 can be conveniently controlled by a worker through the control cabinet 200 to work, and the safety of the worker is protected.

Fig. 2 is a schematic structural diagram of a testing apparatus according to an embodiment of the present application.

The testing device 100 provided by the embodiment of the application is used for pressure maintaining testing of a hydraulic component, and the testing device 100 comprises a hydraulic station, a reversing valve 103 and a transfusion pipeline assembly.

The hydraulic station includes a power section 102, the power section 102 for providing liquid to the hydraulic section to be tested. The reversing valve 103 is arranged at the downstream of the power component 102, the reversing valve 103 comprises a liquid inlet, a liquid return port, a first interface and a second interface, the reversing valve 103 has a first state and a second state, the liquid inlet is communicated with the first interface, the liquid return port is communicated with the second interface, the liquid inlet is communicated with the second interface, and the liquid return port is communicated with the first interface.

The transfusion pipeline assembly comprises a liquid inlet pipeline 201, a first liquid return pipeline 202, a first pipeline 203 and a second pipeline 204, the liquid inlet pipeline 201 is connected with the power component 102 and a liquid inlet, the first liquid return pipeline 202 is connected between a liquid return port and a hydraulic station, one end of the first pipeline 203 is connected with a first interface, one end of the second pipeline 204 is connected with a second interface, the other end of the first pipeline 203 and the other end of the second pipeline 204 are both used for connecting a hydraulic component to be tested, a first pressure tester 401 and a first stop valve 301 are arranged on the first pipeline 203, and a second pressure tester 402 and a second stop valve 302 are arranged on the second pipeline 204 to perform pressure maintaining test on the hydraulic component to be tested.

According to the testing device 100 of the embodiment of the application, the other end of the first pipeline 203 and/or the other end of the second pipeline 204 are/is connected to the hydraulic part to be tested, high-pressure liquid is provided through the power part 102, and the high-pressure liquid is input into the hydraulic part to be tested through the reversing valve 103, so that the hydraulic part performs functional action, and the functional action test is realized; high-pressure liquid is input into a hydraulic component to be tested through the reversing valve 103 through the power component 102, then the first stop valve 301 and the second stop valve 302 are closed, pressure change in the hydraulic component is monitored through the first pressure detector 401 and the second pressure detector 402, internal leakage detection of the hydraulic component is achieved, in the process, whether external leakage exists in the hydraulic component can be judged through observing the outer surface of the hydraulic component, and external leakage detection of the hydraulic component is achieved.

The first pressure gauge 401 and the second pressure gauge 402 are used for monitoring the pressure in the hydraulic component to be tested in the internal leakage detection process, in the extending direction of the first pipeline 203, the first stop valve 301 is located between the first pressure gauge 401 and the first interface, in the extending direction of the second pipeline 204, the second stop valve 302 is located between the second pressure gauge 402 and the second interface, so that when the other end of the first pipeline 203 and the other end of the second pipeline 204 are connected to the hydraulic component to be tested, the first pressure gauge 401 is located between the first stop valve 301 and the hydraulic component to be tested, and the second pressure gauge 402 is located between the second stop valve 302 and the hydraulic component to be tested, so that when the first stop valve 301 and the second stop valve are closed, the pressure in the hydraulic component to be tested can be monitored through the first pressure gauge 401 and the second pressure gauge 402.

In summary, with the testing device 100 according to the embodiment of the present application, a functional operation test, an internal leakage detection and an external leakage detection can be performed on a hydraulic component according to an actual use condition of the hydraulic component, so that the detection accuracy is high, the factory pass rate of each hydraulic component can be ensured, and the frequency of oil leakage faults occurring during field operation of a hydraulic system is reduced.

It can be understood that, when the pressure maintaining test is performed on the hydraulic component, the controller may be used to control the testing device 100 to automatically operate, and the controller is used to control the start and stop of the power component 102 and the state of the manual switching reversing valve 103, so as to complete the functional action test, the internal leakage detection and the external leakage detection on the hydraulic component, and certainly, the states of the power component 102 and the manual switching reversing valve 103 may be manually started and stopped, which is also within the protection scope of the present application.

It can be understood that, in order to achieve a better testing effect, when the pressure maintaining test is performed on the hydraulic component to be tested, the testing pressure can be the maximum using pressure of the hydraulic component to be tested. Specifically, when the internal leakage detection and the external leakage detection are performed on the hydraulic component to be tested, when the pressure in the liquid inlet pipeline 201 is smaller than a first preset value, the power component 102 is turned on, high-pressure liquid is input into the hydraulic component through the power component 102, and when the pressure in the liquid inlet pipeline 201 reaches a second preset value, the power component 102 can stop running. The first preset value can be the minimum value of the working pressure of the hydraulic component to be tested, and the second preset value can be the maximum value of the working pressure of the hydraulic component to be tested, namely the range of the working pressure of the hydraulic component to be tested is from the first preset value to the second preset value.

Optionally, the pressure of the liquid inlet pipeline 201 may be measured by a third pressure gauge, and the power unit 102 is configured to be turned on when the pressure measured by the third pressure gauge is smaller than a first preset value and turned off when the pressure reaches a second preset value, that is, the power unit 102 is turned on and turned off according to the measurement result of the third pressure gauge, and the degree of automation is high.

The hydraulic parts to be tested are various, the hydraulic parts to be tested can be at least one of a hydraulic cylinder 001, a blade lock 002, an energy accumulator assembly 003 and an electro-hydraulic slip ring 004, and the hydraulic cylinder 001 is taken as an example to specifically explain the testing process of the hydraulic parts.

The pneumatic cylinder 001 is including having the pole chamber and no pole chamber, when carrying out the pressurize test to pneumatic cylinder 001, can be connected the other end of first pipeline 203 with having the pole chamber of pneumatic cylinder 001, and the other end of second pipeline 204 is connected with the no pole chamber of pneumatic cylinder 001.

When a functional action test is carried out on the hydraulic cylinder 001, the first stop valve 301 and the second stop valve 302 are opened, when the reversing valve 103 is in a first state, under the action of the power component 102, high-pressure liquid can be input into a rod cavity of the hydraulic cylinder 001 through the liquid inlet pipeline 201, the reversing valve 103 and the first pipeline 203, so that the volume of the rod cavity is increased, meanwhile, liquid in a rodless cavity of the hydraulic cylinder 001 can flow back to a hydraulic station through the second pipeline 204, the reversing valve 103 and the first liquid return pipeline 202, when the reversing valve 103 is in a second state, under the action of the power component 102, high-pressure liquid can be input into a rodless cavity of the hydraulic cylinder 001 through the liquid inlet pipeline 201, the reversing valve 103 and the second pipeline 204, so that the volume of the rodless cavity is increased, and liquid in the rod cavity of the hydraulic cylinder 001 can flow back to the hydraulic station through the first pipeline 203, the reversing valve 103 and the first liquid return pipeline 202, so that the states of the power component 102 and the reversing valve 103 are switched, the reciprocating motion of the piston rod of the hydraulic cylinder 001 can be realized.

When testing internal leakage and external leakage of the hydraulic cylinder 001, firstly inputting high-pressure liquid into a rod cavity or a rodless cavity of the hydraulic cylinder 001 through the power component 102, then closing the first stop valve 301 and the second stop valve 302, monitoring the pressure in the rod cavity through the first pressure gauge 401, monitoring the pressure in the rodless cavity through the second pressure gauge 402, obtaining the pressure drop of the rod cavity and the pressure drop of the rodless cavity within preset time, and obtaining the internal leakage amount of the hydraulic cylinder 001 through the pressure drops; in this process, by observing the outer surface of the hydraulic cylinder 001, it can be determined whether or not there is an external leak from the hydraulic cylinder 001.

Optionally, in order to achieve a better test effect, when the hydraulic cylinder 001 is subjected to pressure maintaining test, the test pressure can be the maximum use pressure of the hydraulic cylinder 001.

For a hydraulic part to be tested, which only has a cavity for liquid to enter and exit, such as some types of blade locks 002, etc., during testing, only the other end of the first pipeline 203 or the other end of the second pipeline 204 needs to be connected to the cavity, when the reversing valve 103 is in the first state, under the action of the power part 102, high-pressure liquid is input into the hydraulic part through the liquid inlet pipeline 201 and the reversing valve 103, and when the reversing valve 103 is in the second state, an inner body in the hydraulic part is discharged to a hydraulic station through the reversing valve 103 and the liquid return pipeline.

For the hydraulic component to be tested with constant liquid inlet position and liquid outlet position, such as the electro-hydraulic slip ring 004, during the test, the other end of the first pipeline 203 may be connected to the liquid inlet position of the hydraulic component to be tested and the reversing valve 103 may be always in the first state (or the other end of the second pipeline 204 may be connected to the liquid inlet position of the hydraulic component to be tested and the reversing valve 103 may be always in the second state).

In some alternative embodiments, a quick-change connector 601 may be disposed at the other end of the first pipeline 203 and the other end of the second pipeline 204, the quick-change connector 601 is disposed to enable the testing device 100 to be connected to the hydraulic component to be tested quickly and conveniently, and in addition, the quick-change connector 601 has a self-closing function to reduce outflow of liquid when the pipelines are disassembled.

Optionally, high-pressure rubber pipes 605 may be disposed at the other end of the first pipeline 203 and the other end of the second pipeline 204, the first pipeline 203 and the second pipeline 204 are connected to the hydraulic component to be tested through the corresponding high-pressure rubber pipes 605, and the high-pressure rubber pipes 605 can bear a large pressure, so as to effectively avoid liquid leakage.

In some alternative embodiments, the testing device 100 further comprises a first pressure tap 602, the first pressure tap 602 being disposed in the first line 203 downstream of the first shut-off valve 301; when the testing device 100 fails and pressure in the first pipeline 203 needs to be measured, a pressure gauge can be arranged at the first pressure measuring connector 602 to detect the pressure of the first pipeline 203, and the testing device is simple and convenient.

Optionally, the testing apparatus 100 further includes a second pressure measuring joint 603, the second pressure measuring joint 603 is disposed on the second pipeline 204 and located downstream of the second stop valve 302, when the testing apparatus 100 fails and needs to measure pressure in the second pipeline 204, a pressure gauge may be disposed at the second pressure measuring joint 603, so as to perform pressure detection on the second pipeline 204, which is simple and convenient.

In some optional embodiments, the infusion pipeline assembly may further include a first overflow pipeline, the first overflow pipeline is communicated with the liquid inlet pipeline 201, a first overflow valve 309 is disposed on the first overflow pipeline, and optionally, the first overflow pipeline may be communicated with the liquid inlet pipeline 201 and the hydraulic station; when the pressure in the liquid inlet pipeline 201 is greater than a preset threshold value, the first overflow valve 309 is opened, so that part of liquid in the liquid inlet pipeline 201 is discharged back to the hydraulic station, the power component 102 can be protected, and the testing device 100 is prevented from accidents caused by overhigh pressure.

In some optional embodiments, the testing apparatus 100 provided in this embodiment of the present application may further include an energy storage assembly, where the energy storage assembly includes the accumulator 104, and the accumulator 104 is communicated with the fluid inlet line 201 through an energy storage line 208; when high-pressure liquid is input into the hydraulic part to be tested through the power part 102, the energy accumulator 104 can be used as an auxiliary power source to store energy in a liquid path, so that sudden change of pressure in a pipeline is avoided, the starting and stopping times of the power part 102 are reduced, and the service lives of the power part 102, a transfusion pipeline assembly, the reversing valve 103 and the like are protected.

Optionally, the energy storage pipeline 208 may be provided with a third pressure gauge 403, the third pressure gauge 403 may be capable of measuring the pressure of the energy storage pipeline 208, and the power component 102 is configured to be opened when the pressure measured by the third pressure gauge 403 is smaller than the first preset value and closed when the second preset value is reached, that is, the power component 102 is configured to be opened when the pressure of the energy storage pipeline 208 is smaller than the first preset value and closed when the second preset value is reached. The opening and closing of the power unit 102 are controlled according to the pressure of the energy storage pipeline 208, the starting and stopping times of the power unit 102 can be reduced, and the power unit 102 is protected.

Because the hydraulic parts to be tested used in the existing place may be produced by different manufacturers and the working pressures may be different, a plurality of third pressure gauges 403 may be provided, and the plurality of third pressure gauges 403 respectively correspond to a plurality of groups of hydraulic parts to be tested, so that the use is simple and convenient.

Optionally, the energy storage pipeline 208 is further provided with a pressure gauge 404, and the pressure of the energy storage pipeline 208 is displayed through the pressure gauge 404, so that a worker can conveniently check the pressure of the energy storage pipeline 208.

Optionally, a third check valve 303 and a first check valve 304 may be further disposed on the charging line 208, and the third check valve 303 and the first check valve 304 may be disposed in parallel, wherein the first check valve 304 allows the fluid to flow from the charging line 208 to the accumulator 104; the third stop valve 303 and the first check valve 304 are connected in parallel, which not only ensures that the accumulator 104 is charged with liquid in time, but also controls the flow rate when the accumulator 104 releases liquid, thereby preventing the valve member from being damaged due to excessive flow rate.

Optionally, an energy storage stop valve 307 may be further disposed on the energy storage pipeline 208, and opening and closing of the energy storage pipeline 208 may be controlled by opening and closing the energy storage stop valve 307, so that the energy accumulator 104 is connected or disconnected with the liquid inlet pipeline 201.

Optionally, the energy storage assembly may further include an energy storage and pressure release pipeline 209, the energy storage and pressure release pipeline 209 is communicated with the energy storage pipeline 208 and the first liquid return pipeline 202, and an energy storage and pressure release stop valve 308 is arranged on the energy storage and pressure release pipeline 209; when the pressure maintaining test is performed on the hydraulic component, the energy storage and pressure relief stop valve 308 is closed, and when the energy storage component needs to be maintained, the energy storage and pressure relief stop valve 308 is opened to release the pressure of the energy accumulator 104.

It can be understood that the hydraulic component to be tested is difficult to avoid liquid leakage in the using process, and in order to facilitate the leaked liquid to be discharged back to the hydraulic station, a liquid leakage outlet, namely a liquid leakage outlet, is usually arranged on the hydraulic component to be tested.

Optionally, the energy storage assembly further includes a second overflow pipeline, the second overflow pipeline is communicated with the energy storage pipeline 208, a second overflow valve 310 is disposed on the second overflow pipeline, and optionally, the second overflow pipeline is communicated with the energy storage pipeline 208 and the hydraulic station; when the pressure in the energy storage pipeline 208 is greater than the preset threshold value, the second overflow valve 310 is opened, so that part of the liquid in the energy storage pipeline 208 is discharged back to the hydraulic station, and the energy accumulator 104 can be protected.

Optionally, the testing apparatus 100 further includes a third pressure measuring connector 604, the third pressure measuring connector 604 is disposed in the energy storage pipeline 208, the third pressure measuring connector 604 may be located between the energy storage device 104 and the energy storage stop valve 307, the third pressure measuring connector 604 is disposed to facilitate pressure detection on the energy storage device 104, when the testing apparatus 100 fails and needs to measure pressure in the energy storage device 104, a pressure gauge is disposed at the third pressure measuring connector 604 to perform pressure detection on the energy storage pipeline 208, which is simple and convenient.

Optionally, the testing apparatus 100 further includes a fourth pressure measuring joint 606, the fourth pressure measuring joint 606 is disposed in the energy storage pipeline 208, and the fourth pressure measuring joint 606 may be located between the energy storage stop valve 307 and the liquid inlet pipeline 201, and the fourth pressure measuring joint 606 may be disposed to facilitate pressure detection on the energy storage pipeline 208; when the testing device 100 fails and needs to measure the pressure in the energy storage pipeline 208, a pressure gauge can be arranged at the fourth pressure measuring joint 606 to detect the pressure in the energy storage pipeline 208, which is simple and convenient.

In some optional embodiments, the infusion pipeline assembly further includes a liquid drainage pipeline 206, one end of the liquid drainage pipeline 206 is communicated with the first liquid drainage pipeline 202, and the other end is used for connecting a liquid drainage outlet of the hydraulic component to be tested; the liquid leakage outlet of the hydraulic component to be tested is communicated with the first liquid return pipeline 202 through the liquid leakage pipeline 206, so that liquid leaked from the interior of the hydraulic component to be tested can be conveniently discharged back to the hydraulic station.

In some optional embodiments, the infusion pipeline assembly may further include a second liquid return pipeline 205, one end of the second liquid return pipeline 205 is communicated with the first liquid return pipeline 202, and the other end is used for connecting a liquid return outlet of the hydraulic component to be tested, so that liquid in the hydraulic component to be tested may be discharged to the hydraulic station through the second liquid return pipeline 205 and the first liquid return pipeline 202, which is simple and convenient.

Alternatively, a plurality of second return lines 205 and drain lines 206 may be provided to facilitate simultaneous connection of a plurality of hydraulic components to be tested.

Taking the electro-hydraulic slip ring 004 as an example, the electro-hydraulic slip ring 004 is provided with a liquid return outlet, during testing, the other end of the first pipeline 203 can be connected to the liquid inlet position of the hydraulic part to be tested and the reversing valve 103 is always in the first state (or the other end of the second pipeline 204 is connected to the liquid inlet position of the hydraulic part to be tested and the reversing valve 103 is always in the second state), and the second liquid return pipeline 205 is connected to the liquid return outlet of the electro-hydraulic slip ring 004, so that functional action testing, internal leakage detection and external leakage detection can be performed on the electro-hydraulic slip ring 004, during testing, high-pressure liquid enters the electro-hydraulic slip ring 004 through the liquid inlet pipeline 201 and the first pipeline 203 (or the second pipeline 204), and then is discharged to a hydraulic station through the liquid return outlet of the electro-hydraulic slip ring 004 and the second liquid return pipeline 205 and the first liquid return pipeline 202.

Optionally, a fourth stop valve 305 may be provided on the second return line 205 to facilitate internal leakage detection of the electro-hydraulic slip ring 004 and the like.

Optionally, a fifth stop valve 306 may be disposed on the liquid leakage pipeline 206, and whether the liquid leakage pipeline 206 is communicated or not may be controlled by controlling opening and closing of the fifth stop valve 306.

In some alternative embodiments, the other end of the second liquid return line 205 and the other end of the liquid discharge line 206 may be provided with a quick-change connector 601, the quick-change connector 601 is configured to be capable of being quickly connected to the testing device 100, and in addition, the quick-change connector 601 has a self-sealing function, so as to reduce the outflow of liquid when the lines are disassembled.

Optionally, a high-pressure rubber tube 605 may be disposed at the other end of the second liquid return pipeline 205 and the other end of the liquid discharge pipeline 206, the other end of the second liquid return pipeline 205 and the other end of the liquid discharge pipeline 206 are connected to the hydraulic component to be tested through the corresponding high-pressure rubber tube 605, and the high-pressure rubber tube 605 can bear a large pressure and can effectively avoid liquid leakage.

In some optional embodiments, the liquid feeding and pressure relieving pipeline 207 may further include a liquid feeding and pressure relieving pipeline 207, the liquid feeding and pressure relieving pipeline 207 communicates with the liquid feeding pipeline 201 and the hydraulic station, a liquid feeding and pressure relieving valve 311 is disposed on the liquid feeding and pressure relieving pipeline 207, and the liquid feeding and pressure relieving valve 311 is configured to be opened when the to-be-tested hydraulic component operates and the pressure in the liquid feeding pipeline 201 is greater than a second preset value and is closed when the pressure in the to-be-tested hydraulic component decreases to a first preset value. The first preset value may be a minimum value of the working pressure of the hydraulic component to be tested, and the second preset value may be a maximum value of the working pressure of the hydraulic component to be tested, that is, the working pressure range of the hydraulic component to be tested may be from the first preset value to the second preset value.

In the process of testing the functional action of the hydraulic component, the power component 102 runs all the time to provide high-pressure liquid for the hydraulic component to be tested, in an initial state, the liquid inlet pressure release valve 311 is closed to gradually increase the pressure in the liquid inlet pipeline 201, when the pressure in the liquid inlet pipeline 201 is greater than a second preset value, the liquid inlet pressure release valve 311 is opened to discharge part of the liquid in the liquid inlet pipeline 201 back to the hydraulic station, so that the pressure in the liquid inlet pipeline 201 is prevented from being continuously increased, and when the pressure in the liquid inlet pipeline 201 is reduced to a first preset value, the liquid inlet pressure release valve 311 is closed to gradually increase the pressure in the liquid inlet pipeline 201; the pressure is built by the liquid inlet pressure relief valve 311, so that the pressure in the liquid inlet pipeline 201 is always kept within a preset range.

Optionally, a second check valve 312 may be further disposed on the liquid inlet pipe 201, the second check valve 312 may be located downstream of the power component 102, and the liquid can be prevented from flowing back to the power component 102 through the second check valve 312.

In some optional embodiments, the power component 102 may include a hydraulic pump, optionally, the hydraulic pump may be a fixed displacement gear pump, the power component 102 may further include a motor, the fixed displacement gear pump is connected to the motor through a coupling, the motor drives a gear of the fixed displacement gear pump to rotate to output high-pressure hydraulic oil, the fixed displacement gear pump has a large rotation speed range and is resistant to impact load, insensitive to oil contamination, and convenient to maintain.

The power part 102 is used for providing liquid for the hydraulic part to be tested, the liquid can be water, hydraulic oil and the like, and can be specifically selected according to the type of the liquid used by the hydraulic part to be tested during field operation, so that the use condition of the hydraulic part to be tested can be simulated more truly. Optionally, the liquid may be hydraulic oil, that is, the power component 102 is used to provide hydraulic oil for the hydraulic component to be tested, so that the hydraulic component to be tested can be better protected.

In some optional embodiments, the hydraulic station further comprises a tank 101 for storing liquid, and the liquid inlet of the power component 102 and the first liquid return line 202 are both communicated with the tank 101; during testing, the power component 102 inputs the liquid in the liquid storage tank 101 to the hydraulic component to be tested through the liquid inlet pipeline 201, and the liquid in the hydraulic component to be tested flows back to the liquid storage tank 101 through the first liquid return pipeline 202.

Optionally, the first liquid return pipeline 202, the first overflow pipeline, the second overflow pipeline, the liquid inlet pressure relief pipeline 207, the energy storage pressure relief pipeline 209, and the like are all communicated with the liquid storage tank 101, so that the liquid can flow back to the liquid storage tank 101.

Optionally, a liquid level detector 501 may be provided within the liquid tank 101, the liquid level detector 501 being configured to be triggered when the height of the liquid within the liquid tank 101 is below a preset threshold; the liquid level detector 501 can be connected with a controller of the testing system, when the height of liquid in the liquid storage tank 101 is lower than a preset threshold value, the liquid level detector 501 is triggered, a signal is transmitted to the controller, the controller can control the alarm to alarm, and a worker is reminded to add liquid into the liquid storage tank 101.

Optionally, the liquid storage tank 101 is further provided with a liquid level meter 503, the height of liquid in the liquid storage tank 101 can be displayed in real time through the liquid level meter 503, and the liquid level meter 503 is arranged to facilitate observation of the height of the liquid in the liquid storage tank 101 by workers.

Optionally, the liquid storage tank 101 has a vent hole, and when the liquid level in the liquid storage tank 101 changes, air can enter the liquid storage tank 101 through the vent hole or be discharged from the liquid storage tank 101; an air filter 502 may be disposed at the vent hole, and the air entering the liquid storage tank 101 may be filtered by the air filter 502, so that the foreign substances in the external air may be prevented from entering the liquid storage tank 101.

Optionally, a temperature sensor 504 may be further disposed in the liquid storage tank 101, and the temperature of the liquid in the liquid storage tank 101 may be measured by the temperature sensor 504.

In some optional embodiments, testing device 100 further comprises a cleanliness sensor 505, and cleanliness sensor 505 is connected to first fluid return line 202 through a fifth stop valve 313; when the liquid in the hydraulic component flows back to the hydraulic station through the first liquid return pipeline 202, part of the liquid in the first liquid return pipeline 202 flows to the cleanliness sensor 505 through the fifth stop valve 313, so that the cleanliness of the liquid in the hydraulic component is measured through the cleanliness sensor 505, and the working personnel can conveniently judge whether the liquid cleanliness meets the use requirement.

Optionally, for convenience of connection, the ends of the feed liquid pressure relief pipeline 207 and the energy storage pressure relief pipeline 209 for communicating with the hydraulic station may be connected to the first liquid return pipeline 202 through a fifth stop valve 313. Optionally, the liquid storage tank 101 may further be provided with a cleanliness sensor 505, and the cleanliness of the liquid in the liquid storage tank 101 may be measured by the cleanliness sensor 505, so that the staff can conveniently judge whether the cleanliness of the liquid in the liquid storage tank 101 meets the use requirements.

In some optional embodiments, an inlet filter 506 is disposed on the inlet pipe 201 to filter the liquid entering the reversing valve 103 and the hydraulic component to be tested, so as to prevent impurities in the liquid from entering the reversing valve 103 and the hydraulic component to be tested to cause abrasion thereof.

In some optional embodiments, a liquid return filter 507 may be disposed on the first liquid return line 202; the hydraulic part to be tested and all valve elements of the testing device 100 are abraded in the operation process to generate impurities, liquid flowing back to the hydraulic station can be filtered through the liquid return filter 507, the cleanliness of the liquid at the hydraulic station is guaranteed, the power part 102 is prevented from sucking the impurities, and abrasion of the power part 102 is reduced.

Optionally, the liquid returning filter 507 is disposed downstream of the second liquid returning pipeline 205, the liquid discharging pipeline 206 and the energy storage and pressure relief pipeline 209, so that the liquid discharged through the second liquid returning pipeline 205, the liquid discharging pipeline 206 and the energy storage and pressure relief pipeline 209 is filtered before flowing back to the hydraulic station, and the cleanliness of the liquid at the hydraulic station can be ensured.

In some optional embodiments, a radiator 508 may be further disposed on the first return line 202, and the radiator 508 may be configured to be triggered when the temperature of the liquid in the tank 101 is higher than a preset threshold, so that the liquid flowing back to the hydraulic station can be cooled by the radiator 508, and the temperature of the liquid in the tank 101 is prevented from being too high.

Optionally, the radiator 508 is disposed downstream of the second fluid return line 205, the fluid discharge line 206, and the energy storage and pressure release line 209, so that the fluid discharged through the second fluid return line 205, the fluid discharge line 206, and the energy storage and pressure release line 209 is cooled before flowing back to the hydraulic station, thereby further avoiding an excessive temperature of the fluid in the fluid storage tank 101.

Optionally, a return filter 507 may be provided downstream of the radiator 508 to avoid overheating of the liquid from affecting the return filter 507.

Alternatively, a fifth stop valve 313 may be connected upstream of radiator 508, and the end of charge-discharge line 207 and charge-storage-discharge line 209 for communicating with the hydraulic station may be connected upstream of radiator 508 via fifth stop valve 313, so that the liquid discharged via charge-discharge line 207 and charge-storage-discharge line 209 is also cooled and filtered before flowing back to the hydraulic station.

Optionally, the testing device 100 may further include a third check valve 314, where the third check valve 314 is connected in parallel with the heat sink 508, so as to prevent the heat sink 508 from being damaged due to an excessive return flow.

In some alternative embodiments, the infusion pipeline assembly may be integrated into a valve block, and the reversing valve 103, the power component 102, the first pressure gauge 401, the first stop valve 301, the second pressure gauge 402, and the second stop valve 302 may be mounted on the valve block and communicate with the corresponding infusion pipeline through a mounting interface on the valve block; the transfusion pipeline assembly is integrated in the valve block, the transfusion pipeline assembly is not easy to damage, the assembly, the maintenance and the replacement of all parts such as the reversing valve 103 and the first pressure gauge 401 are simple and convenient, in addition, the integrated design can reduce the size of the testing device 100, and the space is saved.

In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive of all of the details and are not intended to limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims (13)

1. A testing device for pressure holding testing of a hydraulic component, comprising:

the hydraulic station comprises a power component, a signal processing unit and a signal processing unit, wherein the power component is used for providing liquid for a hydraulic component to be tested;

the reversing valve is arranged at the downstream of the power component and comprises a liquid inlet, a liquid return port, a first interface and a second interface, the reversing valve has a first state and a second state, the liquid inlet is communicated with the first interface, the liquid return port is communicated with the second interface, the liquid inlet is communicated with the second interface, and the liquid return port is communicated with the first interface;

transfusion pipeline subassembly, including liquid inlet pipeline, first liquid return pipeline, first pipeline and second pipeline, the feed liquor pipe connection power part with the inlet, first liquid return pipe connection in return the liquid mouth with between the hydraulic pressure station, the one end of first pipeline is connected first interface, the one end of second pipeline is connected the second interface, the other end of first pipeline with the other end of second pipeline all is used for connecting the examination hydraulic pressure part that awaits measuring, be provided with first manometer and first stop valve on the first pipeline, be provided with second manometer and second stop valve on the second pipeline, it is right to await measuring hydraulic pressure part carries out the pressurize test.

2. The testing device of claim 1, further comprising an energy storage assembly comprising an accumulator in communication with the fluid intake conduit via an energy storage conduit.

3. The testing device according to claim 2, wherein the energy storage pipeline is provided with a third pressure gauge, and the power component is configured to be opened when the pressure of the energy storage pipeline is smaller than a first preset value and closed when a second preset value is reached;

and/or the energy storage pipeline is provided with a pressure gauge for displaying the pressure of the energy storage pipeline.

4. The test device of claim 2, wherein a third stop valve and a first check valve are arranged on the energy storage pipeline, the third stop valve and the first check valve are arranged in parallel, and the first check valve allows fluid to flow from the energy storage pipeline into the energy accumulator.

5. The testing device of claim 2, wherein the energy storage assembly further comprises an energy storage and pressure release pipeline, the energy storage and pressure release pipeline is communicated with the energy storage pipeline and the first liquid return pipeline, and an energy storage and pressure release stop valve is arranged on the energy storage and pressure release pipeline.

6. The testing device of claim 2, wherein the infusion pipeline assembly further comprises a second liquid return pipeline, one end of the second liquid return pipeline is communicated with the first liquid return pipeline, and the other end of the second liquid return pipeline is used for connecting a liquid return outlet of the hydraulic component to be tested;

the infusion pipeline assembly further comprises a liquid drainage pipeline, one end of the liquid drainage pipeline is communicated with the first liquid return pipeline, and the other end of the liquid drainage pipeline is used for being connected with a liquid drainage outlet of the to-be-tested hydraulic component.

7. The testing device of claim 6, wherein a return filter is disposed on the first return line to filter liquid flowing back to the hydraulic station;

the liquid return filter is arranged at the downstream of the second liquid return pipeline and the liquid discharge pipeline;

and/or the presence of a gas in the atmosphere,

a radiator is arranged on the first liquid return pipeline to cool the liquid flowing back to the hydraulic station;

the radiator is arranged at the downstream of the second liquid return pipeline and the liquid leakage pipeline;

and/or the presence of a gas in the gas,

a liquid inlet filter is arranged on the liquid inlet pipeline to filter liquid entering the reversing valve and the hydraulic part to be tested;

and/or the presence of a gas in the gas,

and the other end of the first pipeline, the other end of the second liquid return pipeline and the other end of the liquid discharge pipeline are all provided with quick-change connectors.

8. The testing device of claim 2, wherein the infusion pipeline assembly further comprises a first overflow pipeline, the first overflow pipeline is communicated with the liquid inlet pipeline, and a first overflow valve is arranged on the first overflow pipeline;

and/or the energy storage assembly further comprises a second overflow pipeline, the second overflow pipeline is communicated with the energy storage pipeline, and a second overflow valve is arranged on the second overflow pipeline;

and/or the testing device further comprises a first pressure measuring joint, wherein the first pressure measuring joint is arranged on the first pipeline and is positioned at the downstream of the first stop valve;

and/or the testing device further comprises a second pressure measuring joint, wherein the second pressure measuring joint is arranged on the second pipeline and is positioned at the downstream of the second stop valve;

and/or the testing device further comprises a third pressure measuring joint, and the third pressure measuring joint is arranged on the energy storage pipeline.

9. The testing device according to claim 1, wherein the liquid feeding and pressure relieving pipeline is further arranged on the liquid feeding and pressure relieving pipeline, the liquid feeding and pressure relieving pipeline is communicated with the liquid feeding pipeline and the hydraulic station, and a liquid feeding and pressure relieving valve is arranged on the liquid feeding and pressure relieving pipeline and is configured to be opened when the to-be-tested hydraulic component runs and the pressure in the liquid feeding pipeline is greater than a second preset value and to be closed when the pressure in the liquid feeding pipeline is reduced to a first preset value.

10. The testing device of claim 1, wherein the hydraulic station further comprises a liquid storage tank for storing liquid, and the liquid inlet of the power component and the first liquid return pipeline are both communicated with the liquid storage tank;

the tank is provided with a liquid level detector configured to be triggered when the level of liquid in the tank is below a preset threshold;

and/or the liquid storage tank is provided with a vent hole, and an air filter is arranged at the vent hole to filter air entering the liquid storage tank;

and/or the liquid storage tank is also provided with a liquid level meter so as to observe the height of liquid in the liquid storage tank;

and/or the liquid storage tank is also provided with a temperature sensor for measuring the temperature of the liquid in the liquid storage tank;

and/or the testing device further comprises a cleanliness sensor, and the cleanliness sensor is connected with the first liquid return pipeline through a fifth stop valve.

11. The testing device of claim 1, wherein the fluid line assembly is integrated within a valve block, and the directional valve, the power component, the first pressure gauge, the first shut-off valve, the second pressure gauge, and the second shut-off valve are mounted on the valve block and communicate with corresponding fluid lines through mounting interfaces on the valve block.

12. A test system for dwell testing of a hydraulic component, comprising:

a test device according to any one of claims 1 to 11;

the control cabinet comprises a controller and a display panel, and the controller is used for controlling the power component and the reversing valve to work;

and the mounting bracket is used for mounting the hydraulic part to be tested.

13. The test system of claim 12, further comprising a screen, the control cabinet being located on one side of the screen, the test device and the mounting bracket being located on the other side of the screen;

and/or the mounting bracket comprises at least one of a hydraulic cylinder bracket, a blade lock bracket, an accumulator assembly bracket, and an electro-hydraulic slip ring bracket.

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