Combined hydraulic station test platform
Technical Field
The invention belongs to the technical field of hydraulic testing equipment, and particularly relates to a combined type hydraulic station testing platform.
Background
Hydraulic stations play a great role in hydraulic transmission systems. The temperature of the hydraulic oil itself is increased due to heat generated by each component of the hydraulic station during operation and heat generated after the hydraulic oil enters the testing device and is in frictional contact with each component of the hydraulic system of the testing device. So that the oil temperature of the hydraulic oil must be higher than the oil temperature of the hydraulic oil in the hydraulic tank after the hydraulic oil returns to the oil passage of the hydraulic station through the input end of the combining valve block. In order to prolong the life of the hydraulic oil and reduce damage to the structures of the hydraulic station caused by high temperature, cooling is required when the hydraulic oil flows back.
At present, the cooling mode of hydraulic oil mostly adopts condenser and fan cooperation to make cold wind to utilize cold wind to cool off oil pipeline, but because the oil circuit velocity of flow is fast, cold wind and hydraulic oil contact time are too short, lead to the cooling effect not good.
Disclosure of Invention
The invention provides a combined type hydraulic station test platform, which comprises a group of main test modules and a plurality of component test modules, wherein the main test modules comprise a hydraulic station box body, a power assembly, a first combined valve block, an oil way branching device, a first cooling assembly and a first combined mechanism, the top of the hydraulic station box body is provided with a test platform body, the power assembly is arranged on the test platform body, a hydraulic oil tank is fixedly arranged in an inner cavity of the hydraulic station box body and is communicated with the input end of the power assembly, the input end of the oil way branching device is communicated with the output end of the hydraulic oil pump, and the input end of the first combined valve block is communicated with the output end of the oil way branching device;
The first cooling assembly comprises a first shell, a liquid flowing pipe and a cooling pipe, wherein the first shell is fixedly arranged on the testing platform body, the liquid flowing pipe is arranged in the first shell, the inlet end of the liquid flowing pipe is communicated with the oil path branching unit, the cooling pipe is in a spiral structure and is sleeved on the liquid flowing pipe, the first shell is provided with a water inlet and a water outlet, and the two ends of the cooling pipe are respectively communicated with the inner sides of the water inlet and the water outlet;
The connecting mechanism of the sub-test module can be movably clamped with the first combination mechanism, the input end of the sub-test module is communicated with the oil path branching unit, and the output end of the sub-test module is communicated with the filtering assembly.
Further, the power assembly comprises a power motor and a hydraulic oil pump, the power motor is fixedly arranged on the testing platform body, the input end of the hydraulic oil pump is in transmission connection with the output end of the power motor through a coupler, a group of oil pipelines are communicated with the hydraulic oil pump, and the other end of the oil pipeline is communicated with the hydraulic oil tank.
Further, the first combined valve block comprises a valve block body, an overflow valve, a reversing valve and a pressure gauge;
The valve block body is fixedly arranged on the test platform body, the input end of the valve block body is communicated with the oil path branching unit through a group of oil pipes, the output end of the valve block body is communicated with the inlet end of the fluid flow pipe through a group of oil pipes, the overflow valve, the reversing valve and the pressure gauge are all communicated on the valve block body, the valve block body is respectively provided with an oil outlet port and an oil inlet port, the two ends of the first shell are respectively provided with a first liquid inlet port and a first liquid outlet port, the first liquid inlet port is communicated with the output end of the valve block body through a group of oil pipes, the first liquid outlet port is communicated with the input end of the filter assembly through a group of oil pipes, and the two ends of the fluid flow pipe are respectively communicated with the first liquid inlet port and the first liquid outlet port;
the condenser is arranged on the side wall of the hydraulic station box body.
Further, a first opening is formed in one side wall of the hydraulic station box body, a first built-in box is communicated in the first opening, the first combined mechanism is fixedly installed in the first built-in box, the output end of the first combined mechanism can penetrate through the first opening to the outside of the hydraulic station box body, and a first box door is arranged on the first opening.
Further, the hydraulic station also comprises a filter assembly, wherein the filter assembly comprises a second shell, an electrode rod and a slag tapping pipe;
The second shell is arranged in the hydraulic station box body, a second liquid inlet is formed in the top of the second shell and is communicated with the first liquid outlet through a group of oil pipes, the electrode rod is arranged in the second shell in the vertical direction, a plurality of groups of empty slots are formed in the surface of the electrode rod in an annular array, the upper end and the lower end of each empty slot are of an open structure, the bottom of one side wall of the second shell is provided with an inclined surface, a filter screen is arranged on the inner side of the inclined surface, a second liquid outlet is formed in the outer side of the inclined surface, the second liquid outlet is communicated with the hydraulic oil tank through a group of oil pipes, a slag discharging pipe is communicated with the bottom of the second shell, and an electromagnetic valve is arranged at the joint of the slag discharging pipe and the second shell.
Further, a drawing plate is arranged on one side wall of the hydraulic station box body, a slag collecting box is arranged on the inner wall of the bottom of one side, close to the drawing plate, of the hydraulic station box body, and the slag collecting box is positioned right below the second shell and is communicated with the slag discharging pipe;
and a relay is arranged in the hydraulic station box body and is electrically connected with the electrode rod through an electric wire.
Further, the first combination mechanism comprises a first connecting rod, a threaded rod and a second connecting rod;
One end of the first connecting rod is hinged to one side wall of the first built-in box, which is far away from the first box door, the threaded rod is rotatably connected to the other end of the first connecting rod, the second connecting rod is located at one end of the first connecting rod, a threaded opening is formed in the threaded opening, an inner cavity is communicated in the threaded opening, the diameter of the inner cavity is larger than that of the threaded opening, the threaded rod is in threaded connection with the threaded opening, one end of the threaded rod, which is far away from the first connecting rod, can movably penetrate into the inner cavity, and a limiting plate is fixedly arranged at one end of the threaded rod, which is far away from the first connecting rod.
The first combined mechanism further comprises a sleeve block, a fixing rod and a thread seat, wherein a connecting rod of the sleeve block is hinged to one end, far away from a thread opening, of the second connecting rod, the fixing rod is installed at the bottom of the sleeve block, an external thread head is arranged at the bottom of the fixing rod, the thread seat is connected to the external thread head in a threaded mode, an anti-falling plate is installed at the bottom of the thread seat, and a sleeve block fixing rod is installed at the top of the sleeve block.
Furthermore, a sleeve block limiting ring is arranged on one side wall, far away from the first box door, of the first built-in box, the sleeve block fixing rod is movably clamped on the sleeve block limiting ring, and a fixing ring is arranged on one side of the first connecting rod.
The testing module comprises a base, a second combined valve block, a second cooling assembly, a second combined mechanism, a second built-in box and a second box door, wherein the structures of the second combined valve block, the second cooling assembly, the second combined mechanism, the second built-in box and the second box door are respectively the same as those of the first combined valve block, the first cooling assembly, the first combined mechanism, the first built-in box and the first box door;
the output end of the second cooling component is communicated with the second liquid inlet, and the second cooling component is communicated with the condenser through a water pipe;
The second built-in box, the second box door and the second combined mechanism are all arranged on one side wall of the base close to the hydraulic station box body, and the second combined mechanism can be movably clamped with the first combined mechanism.
The beneficial effects of the invention are as follows:
1. According to the invention, the water is cooled to low-temperature cooling water by the refrigeration of the condenser, and is injected into the cooling pipe, so that when hydraulic oil flows through the fluid pipe, heat energy in the hydraulic oil can be absorbed by the cooling water, and the cooling purpose is achieved. Meanwhile, the cooling pipe is wound on the liquid flowing pipe in a spiral structure, so that the contact area between the cooling pipe and the liquid flowing pipe is increased, the indirect contact time between the hydraulic oil and cooling water in the cooling pipe is prolonged, the cooling time of the hydraulic oil is increased, and the cooling effect is improved.
2. According to the invention, high-voltage static electricity is generated by supplying power to the electrode rod, metal oxide and nonmetal carbide particles in the hydraulic oil flowing through the second shell are adsorbed simultaneously by utilizing the principle of electrostatic dust removal, and as the electrode rod surface is provided with a plurality of groups of empty slots, the contact area between the electrode rod and the hydraulic oil is increased, and the cleaning effect is improved. When the impurities need to be cleaned, the power supply to the electrode rod is stopped, so that the electrostatic adsorption force of the electrode rod is lost, then the impurities on the surface of the electrode rod fall into the slag collecting box below, the drawing plate is drawn out, the process is simple and quick, and the working efficiency is improved.
3. When the main test module and the sub test module are required to be combined, a group of fixing rings and fixing rings in the first combination mechanism and the second combination mechanism are mutually butted, and the two groups of screw seats are used for fixing, so that the operation is simple and quick. And the distance from the second fixed rod to the first fixed rod can be extended by rotating the threaded rod, so that the compatibility of the device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structural diagram of a test platform according to an embodiment of the invention;
FIG. 2 shows a schematic cross-sectional view of a test platform according to an embodiment of the invention;
FIG. 3 shows a schematic structural view of a first combining valve block according to an embodiment of the present invention;
FIG. 4 shows a schematic structural view of a first cooling assembly according to an embodiment of the present invention;
FIG. 5 illustrates a schematic cross-sectional view of a first cooling assembly according to an embodiment of the present invention;
FIG. 6 shows a schematic cross-sectional view of a filter assembly according to an embodiment of the invention;
fig. 7 shows a schematic structural view of an electrode rod according to an embodiment of the present invention;
FIG. 8 shows a schematic cross-sectional view of a first built-in tank according to an embodiment of the invention;
fig. 9 is a schematic view showing the structure of a first combining mechanism according to an embodiment of the present invention;
Fig. 10 shows a schematic cross-sectional view of a first combined mechanism according to an embodiment of the invention.
In the figure, 1, a hydraulic station box body; 2, testing the platform body; 3, a hydraulic oil tank; 4, a power motor, 5, a hydraulic oil pump, 6, a first combined valve block, 601, a valve block body, 602, an overflow valve, 603, a reversing valve, 604, a pressure gauge, 605, an oil outlet port, 606, an oil inlet port, 7, a first cooling component, 701, a first shell, 702, a liquid flow pipe, 703, a first liquid inlet port, 704, a first liquid outlet port, 705, a cooling pipe, 706, a water inlet port, 707, a water outlet port, 8, a filter component, 801, a second shell, 802, a second liquid inlet port, 803, an electrode rod, 804, an inclined surface, 805, a second liquid outlet port, 806, a filter screen, 807, a slag discharge pipe, 808, an electromagnetic valve, 809, a blank groove, 9, a first combined mechanism, 901, a first connecting rod, 902, a threaded rod, 903, a second connecting rod, 904, a threaded port, 905, an inner cavity, 906, a limiting plate, 907, a sleeve block, 908, a fixed rod, 909, an external threaded head, a threaded seat, 911, an anti-falling plate, 912, a sleeve block fixed rod, 10, a first box, 11, a second box door, 806, a filter screen, a sealing sleeve, 17, a second box, a vacuum pump, a sealing sleeve, a vacuum pump, a second box, a vacuum pump, a vacuum box, a vacuum pump, and a vacuum box, and a combined box and a vacuum boxes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a combined type hydraulic station testing platform which comprises a group of main testing modules and a plurality of component testing modules, wherein the main testing modules comprise a hydraulic station box body 1, a testing platform body 2, a hydraulic oil tank 3, a power motor 4, a hydraulic oil pump 5, a first combined valve block 6 and an oil way branching unit 20. Illustratively, as shown in fig. 1 and 2, the test platform body 2 is mounted on top of the hydraulic station housing 1. The test platform body 2 is used for installing equipment required for testing.
The hydraulic oil pump 5 is fixedly arranged on the test platform body 2, and the hydraulic oil pump 5 is communicated with an oil pumping pipe 12. The hydraulic oil pump 5 is used for pressurizing the oil Lu Shi to pump the oil.
The hydraulic oil tank 3 is fixedly arranged in the inner cavity of the hydraulic station tank body 1, and the other end of the oil pumping pipe 12 is communicated with the hydraulic oil tank 3. The hydraulic oil tank 3 is used for storing hydraulic oil required for providing a test.
The power motor 4 is fixedly arranged on the test platform body 2, and the input end of the hydraulic oil pump 5 is in transmission connection with the output end of the power motor 4 through a coupler. The power motor 4 provides power for the oil supply.
The oil path branching unit 20 is fixedly installed on the test platform body 2, and an input end of the oil path branching unit 20 is communicated with an output end of the hydraulic oil pump 5 through a group of oil pipes. The main test module and the plurality of sub-test modules can be supplied with oil simultaneously through the oil path splitter 20.
The first combined valve block 6 is fixedly installed on the test platform body 2, and an input end of the first combined valve block 6 is communicated with an output end of the oil path branching unit 20 through a group of oil pipes. The first combined valve block 6 is used for controlling the speed and direction of oil supply of each group of oil delivery pipelines.
The main test module further comprises a condenser 14, a first cooling assembly 7, a filter assembly 8 and a first combining mechanism 9. The condenser 14 is fixedly installed on the outer wall of the hydraulic station box body 1, the first cooling component 7 is fixedly installed on the test platform body 2, and the input end of the first cooling component 7 is communicated with the output end of the first combined valve block 6 through a group of oil pipes. The condenser 14 is respectively communicated with an inlet and an outlet of the first cooling component 7 through two groups of water pipes.
After hydraulic oil is output from the output end of the first combined valve block 6 and flows into the testing equipment for hydraulic testing, the hydraulic oil flows back to the cavity of the first combined valve block 6 through the input end of the first combined valve block 6 and enters the first cooling assembly 7 through a group of oil pipes, so that the whole oil way is in a circulating state. And because the heat generated by each component of the hydraulic station during operation and the heat generated after the hydraulic oil enters the testing equipment and is in friction contact with each component of the hydraulic system of the testing equipment can cause the temperature of the hydraulic oil to rise, when the hydraulic oil returns into the cavity of the first combined valve block 6 through the input end of the first combined valve block 6, the oil temperature of the hydraulic oil is higher than the oil temperature of the hydraulic oil in the hydraulic oil tank 3, so that the service life of the hydraulic oil is prolonged, the damage of the high temperature to each structure of the hydraulic station is reduced, and the hydraulic oil needs to be cooled after flowing out of the first combined valve block 6.
The filter assembly 8 is installed in the hydraulic station box 1, and the input end of the filter assembly 8 is communicated with the output end of the first cooling assembly 7 through a group of oil pipes. The output end of the first filtering component 8 is communicated with the hydraulic oil tank 3 through a group of oil pipes. The filter assembly 8 is used for filtering oxides carried in the hydraulic oil.
The hydraulic station box body 1 is provided with a drawing plate 17 on one side wall, and the bottom inner wall of one side of the hydraulic station box body 1, which is close to the drawing plate 17, is provided with a slag collecting box 16, and the slag collecting box 16 is positioned under the shell of the filter assembly 8 and is communicated with a slag discharging mechanism of the filter assembly 8. A slag collecting box sealing door 28 is arranged on one side wall of the slag collecting box 16 close to the drawing plate 17. The slag collecting box 16 is provided with a vacuum pump 27.
A first opening is formed in one side wall of the hydraulic station box body 1, a first built-in box 10 is communicated in the first opening, the first combined mechanism 9 is fixedly installed in the first built-in box 10, and the output end of the first combined mechanism 9 can penetrate through the first opening to the outside of the hydraulic station box body 1. The first opening is provided with a first door 11. The first combination mechanism 9 is a built-in structure, and the first combination mechanism 9 can be used for fixing the main test module and the sub-test module.
A relay 15 is installed in the hydraulic station box 1, and the relay 15 is electrically connected with the filter assembly 8 through an electric wire.
The sub-test module comprises a base 21, a second combined valve block 22, a second cooling assembly 23, a second combined mechanism 24, a second built-in box 25 and a second box door 26. The second combined valve block 22, the second cooling module 23, the second combined mechanism 24, the second built-in box 25 and the second box door 26 have the same structures as the first combined valve block 6, the first cooling module 7, the first combined mechanism 9, the first built-in box 10 and the first box door 11, respectively. The input end of the second combined valve block 22 is communicated with the oil path branching device 20.
The output of the second cooling module 23 communicates with the input of the filter module 8.
The second cooling module 23 is in communication with the condenser 14 via a water line.
The second built-in box 25, the second box door 26 and the second combination mechanism 24 are all arranged on a side wall of the base 21, which is close to the hydraulic station box 1. And the second combination mechanism 24 can be movably clamped with the first combination mechanism 9.
The input end of the second combined valve block 22 is communicated with one group of output ends of the oil path branching device 20, when the combined valve block is in operation, the oil path branching device 20 can simultaneously supply oil to the first combined valve block 6 and the second combined valve block 22, and the first combined valve block 6 and the second combined valve block 22 are matched, so that a plurality of groups of to-be-tested products can be tested simultaneously, and the combined type purpose is realized.
The first combined valve block 6 comprises a valve block body 601, an overflow valve 602, a reversing valve 603 and a pressure gauge 604. Illustratively, as shown in fig. 3, the valve block body 601 is fixedly mounted on the test platform body 2, an input end of the valve block body 601 is communicated with the oil path splitter 20 through a set of oil pipes, and an output end of the valve block body 601 is communicated with an input end of the first cooling module 7 through a set of oil pipes. The overflow valve 602, the reversing valve 603 and the pressure gauge 604 are all communicated with the valve block body 601. The valve block body 601 is provided with an oil outlet port 605 and an oil inlet port 606 respectively. The valve block body 601 is communicated with an oil return pipe 13, and the other end of the oil return pipe 13 is communicated with the hydraulic oil tank 3.
After the hydraulic oil enters the valve block body 601, the flow rate of the hydraulic oil can be adjusted through the overflow valve 602, and the first combined valve block 6 is used for testing the strength of the to-be-tested product. The reversing valve 603 is used to open, close or change the direction of the oil flow. The pressure gauge is used for detecting the pressure value of the oil way.
During testing, two groups of oil pipes are respectively communicated with the oil outlet connector 605 and the oil inlet connector 606, and the other ends of the two groups of oil pipes are communicated with the to-be-tested product. Then, the power motor 4 is started, the hydraulic oil pump 5 is controlled to operate by the power motor 4, and the hydraulic oil in the hydraulic oil tank 3 is pumped out through the oil pumping pipe 12 and is delivered to the oil path branching unit 20. And then the hydraulic oil is conveyed into the first combined valve block 6 by the oil path branching device 20. The hydraulic oil then enters the test article through a set of oil lines on the oil outlet 605 to power the test of the test article. The hydraulic oil then flows back into the valve block body 601 through a set of oil lines on the oil inlet port 606 and finally flows into the first cooling assembly 7, so that the oil paths between the components can be in a path state.
When a plurality of component test modules are combined with the main test module, the input ends of the second combination valve blocks 22 of each group are communicated with the oil path branching device 20, and hydraulic oil is distributed into the first combination valve block 6 and the second combination valve blocks 22 of each group according to the requirement through the oil path branching device 20 so as to facilitate the test work to be carried out simultaneously.
The first cooling assembly 7 comprises a first housing 701, a fluid pipe 702 and a cooling pipe 705. As shown in fig. 4 and 5, the first housing 701 is fixedly mounted on the testing platform body 2, and two ends of the first housing 701 are respectively provided with a first liquid inlet 703 and a first liquid outlet 704. The first liquid inlet 703 is communicated with the output end of the valve block body 601 through a set of oil pipes, and the first liquid outlet 704 is communicated with the input end of the filter assembly 8 through a set of oil pipes. The fluid pipe 702 is fixedly installed in the first housing 701, and two ends of the fluid pipe 702 are respectively communicated with the first fluid inlet 703 and the first fluid outlet 704. The cooling tube 705 is a spiral structure and is sleeved on the fluid tube 702. The first housing 701 is provided with a water inlet 706 and a water outlet 707, and two ends of the cooling tube 705 are respectively communicated with the inner sides of the water inlet 706 and the water outlet 707. The outside of the water inlet 706 and the water outlet 707 are respectively communicated with the condenser 14 through a set of water pipes.
The condenser 14 is connected to an external water source, the condenser 14 is turned on, cold air is produced by the operation of the condenser 14, the water is cooled to form cooling water, and then the cooling water is delivered into the cooling tube 705 through the water inlet 706. After the high-temperature hydraulic oil in the first valve block body 601 enters the fluid pipe 702 through the first fluid inlet 703, the internal heat of the high-temperature hydraulic oil is absorbed by the cooling pipe 705 flowing with cooling water, so as to achieve the effect of cooling. The cooling water absorbing the heat returns to the condenser 14 through the water outlet 707 and is continuously cooled, so that the continuous circulation cooling function is realized. And because the cooling tube 705 is wound on the fluid tube 702 in a spiral structure, the contact area between the cooling tube 705 and the fluid tube 702 is increased, and the contact position is more symmetrical, so that the heat dissipation is more uniform, and the cooling quality is improved.
The filter assembly 8 comprises a second housing 801, an electrode rod 803 and a tapping pipe 807. As shown in fig. 6 and 7, the second housing 801 is installed in the hydraulic station housing 1, a second liquid inlet 802 is formed at the top of the second housing 801, and the second liquid inlet 802 is communicated with the first liquid outlet 704 through a set of oil pipes. The electrode rod 803 is installed in the second housing 801 in a vertical direction, and the surface of the electrode rod 803 is provided with a plurality of groups of empty slots 809 in a ring array, and the upper end and the lower end of each empty slot 809 are both in an open structure. The electrode rod 803 is electrically connected to the relay 15 via an electric wire. The bottom of one side wall of the second housing 801 is provided with an inclined plane 804, a filter screen 806 is arranged on the inner side of the inclined plane 804, a second liquid outlet 805 is formed on the outer side of the inclined plane 804, and the second liquid outlet 805 is communicated with the hydraulic oil tank 3 through a group of oil pipes. The bevel angle of the filter screen 806 is the same as the bevel 804. The bottom of the second shell 801 is communicated with a slag discharging pipe 807, and the bottom of the slag discharging pipe 807 is positioned right above the slag collecting box 16. A solenoid valve 808 is provided in the tapping pipe 807.
The relay 15 supplies power to the electrode rod 803 to generate high-voltage static electricity, after hydraulic oil enters the second shell 801 through the second liquid inlet 802, metal oxides in the hydraulic oil can be adsorbed through static electricity, nonmetal carbide particles can be adsorbed at the same time, and as a plurality of groups of empty grooves 809 are formed in the surface of the electrode rod 803, the contact area between the electrode rod 803 and the hydraulic oil is increased, and the cleaning effect is improved.
When the test platform is idle, the overflow valve 602 is closed firstly, so that an oil way is disconnected at the overflow valve 602, then an oil pumping valve of the hydraulic oil tank 3 is opened, and all hydraulic oil remained in each assembly and each group of oil delivery pipelines after the overflow valve 602 is conveyed to the hydraulic oil tank 3. The relay 15 is turned off again to stop the power supply and the electrode rod 803 loses the electrostatic adsorption force, and then the electromagnetic valve 808 is turned on to allow impurities attached to the electrode rod 803 to fall freely into the slag discharging pipe 807 and finally fall into the slag collecting box 16 below. The solenoid valve 808 is then closed such that the tapping duct 807 is fully isolated from the interior cavity of the second housing 801, but in communication with the interior cavity of the slag collection box 16.
The vacuum pump 27 is then started again to adjust the air pressure in the slag collecting box 16 and the slag discharging pipe 807 to be the same as the outside air. Then the pulling plate 17 and the slag collecting box sealing door 28 are opened in sequence, so that impurities in the slag collecting box 16 are emptied.
The slag box sealing door 28 and the drawing plate 17 are then closed in sequence, and the air pressure in the slag box 16 and the tapping pipe 807 is adjusted to the same state as the inner cavity of the second housing 801. So that the air pressure in the whole oil way can not be unbalanced due to deslagging.
The first combination mechanism 9 includes a first connecting rod 901, a threaded rod 902, and a second connecting rod 903. As shown in fig. 8, 9 and 10, one end of the first connecting rod 901 is hinged to a side wall of the first built-in box 10 far away from the first box door 11, the threaded rod 902 is rotatably connected to the other end of the first connecting rod 901, the second connecting rod 903 is located at the one end and is provided with a threaded opening 904, an inner cavity 905 is connected in the threaded opening 904, and the diameter of the inner cavity 905 is larger than that of the threaded opening 904. The threaded rod 902 is in threaded connection with the threaded opening 904, one end of the threaded rod 902 far away from the first connecting rod 901 can movably penetrate into the inner cavity 905, and a limiting plate 906 is fixedly arranged on one end of the threaded rod 902 far away from the first connecting rod 901.
The first combination 9 further comprises a socket 907, a securing rod 908 and a threaded seat 910. The connecting rod of the sleeve block 907 is hinged to the end of the second connecting rod 903 remote from the threaded port 904. The fixing rod 908 is installed at the bottom of the sleeve block 907, an external thread head 909 is arranged at the bottom of the fixing rod 908, and the thread seat 910 is in threaded connection with the external thread head 909. The bottom of the screw seat 910 is provided with an anti-falling plate 911. A sleeve block fixing rod 912 is installed at the top of the sleeve block 907.
A sleeve block limiting ring 18 is mounted on a side wall, far away from the first box door 11, of the first built-in box 10, and the sleeve block fixing rod 912 is movably clamped on the sleeve block limiting ring 18. A fixing ring 19 is disposed on one side of the first connecting rod 901. The fixing rods 908 and the fixing rings 19 on the adjacent group of the second combination mechanisms 24 can be movably clamped with the fixing rods 908 and the fixing rings 19 on the first combination mechanism 9.
When the main test module is used alone, the sleeve block fixing rod 912 is clamped on the sleeve block limiting ring 18, and the first box door 11 is closed, so that the first combination mechanism 9 is completely hidden in the first built-in box 10. The space is saved by the built-in structure, and the whole volume of the test platform is reduced.
When the sub-test module is required to be combined with the main test module, the second door 26 and the first door 11 on the sub-test module are all opened, and then the threaded rod 902 is rotated to adjust the distance between the first connecting rod 901 and the second connecting rod 903 according to the distance between the hydraulic station box 1 and the base 21. The set of mounting posts 908 on the main test module are then withdrawn and snapped into a set of mounting rings 19 on the sub-test module. And a set of fixing rods 908 on the sub-test module are pulled out and clamped on a set of fixing rings 19 on the main test module. The two sets of threaded seats 910 are then respectively threaded onto the two sets of external threaded heads 909, preventing the retaining rod 908 from sliding out. The operation process is simple and quick, the operation time is saved, and the fixability is improved by the aid of the bidirectional fixing mode.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications may be made to the technical solutions described in the foregoing embodiments or equivalents may be substituted for some of the technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention in essence of the corresponding technical solutions.