CN116183209B - Withstand voltage testing device and method for electro-hydraulic proportional pilot valve - Google Patents
Withstand voltage testing device and method for electro-hydraulic proportional pilot valve Download PDFInfo
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- CN116183209B CN116183209B CN202310249033.9A CN202310249033A CN116183209B CN 116183209 B CN116183209 B CN 116183209B CN 202310249033 A CN202310249033 A CN 202310249033A CN 116183209 B CN116183209 B CN 116183209B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a pressure-resistant testing device for an electrohydraulic proportional pilot valve and a method thereof, and relates to the technical field of valve body pressure testing.
Description
Technical Field
The invention belongs to the technical field of valve body pressure test, and particularly relates to a pressure-resistant testing device and a pressure-resistant testing method for an electrohydraulic proportional pilot valve.
Background
The electrohydraulic proportional valve is a pressure and flow output element which is proportional to the input voltage and can be fed back mechanically, hydraulically or electrically. The electro-hydraulic proportional valve has various forms and types,
the electro-hydraulic proportional valve is divided into two types by a structural form, namely a spiral plug-in type proportional valve and a slide valve type proportional valve, wherein the plug-in type proportional valve and the proportional multi-way valve have the functions of pilot control, load sensing, pressure compensation and the like, and the valve body is required to be subjected to pressure-resistant test before leaving the factory, so that safety accidents can not occur in the later stage of practicality.
The application document with the publication number of CN216483928U discloses a device for detecting and testing the pressure of a valve, which comprises a main frame, a base, a pressure sensor and a pressure sensor, wherein a support frame is fixedly arranged on a flat plate at the top of the base; the pressure testing mechanism comprises a support column arranged in the support frame, a first sliding seat and a pressure measuring assembly arranged on the first sliding seat; the clamping mechanism is arranged on the support column and comprises a fixed seat, a fixed frame and a clamping matching component, the second cylinder drives the clamping rod to clamp the valve, the starting switch is pressed, the first cylinder is started to drive the first sliding seat to slide on the support column, the pressure tester moves to the top of the valve, the motor drives the threaded rod to enable the pressure tester to move downwards to be in contact with the valve, the pressure tester carries out compression testing on the valve through continuous pushing of the motor, and meanwhile, the pressure sensor is arranged in the test supporting spring and measures the pressure born by the valve.
In the existing pressure resistance test, only the pressure of the valve is measured, and the pressure resistance inside the valve is not detected.
As another example, the application document with publication number CN109141867a discloses a valve pressure test device with rapid clamping and loosening, a lower connecting rod is slidably matched with an upper connecting rod and connected with the upper connecting rod through an elastic piece, the lower connecting rod is hinged on a frame, the lower end of the lower connecting rod is hinged with the end part of a piston rod, the upper connecting rod is hinged with the upper end of a middle connecting rod, the lower end of the middle connecting rod is hinged with the middle part of a bending arm, one end of the bending arm is hinged on the frame, and a jacking component is installed below the other end of the bending arm; the jacking component acts along with the bending arm and is provided with a first position for compacting the valve and a second position separated from the valve; when the jacking component is located at the first position, the elastic telescopic connecting piece swings through the dead point position, the valve can be rapidly clamped and loosened through the transmission mode of the four connecting rods, when the valve is clamped, the elastic telescopic connecting piece can overcome the elastic force of the elastic piece to swing through the dead point position, the elastic force of the elastic piece is transmitted to the bending moment arm, and the bending moment arm is tightly jacked by the jacking component.
The pressure test device adopts the connecting rod structure to clamp and loosen the valve, is only suitable for clamping the valve with the regular shape or the plane shape, can not reliably clamp the valve with the irregular shape, and has more complex structure when a plurality of valves are simultaneously detected in one set of equipment.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a pressure-resistant testing device and a pressure-resistant testing method for an electrohydraulic proportional pilot valve.
A withstand voltage testing arrangement for electrohydraulic proportional pilot valve, including valve body, air pump and detection case, be equipped with oil inlet and oil-out on the valve body, install the connecting pipe in the oil inlet, the connecting pipe outer wall is equipped with the screw thread, the detection case is placed on the base, the symmetry is equipped with the mounting bracket on the base, and the mounting bracket is located the detection case both sides, be connected with the center pin on the mounting bracket that the symmetry set up, the cover is equipped with left carousel, center seat and right carousel on the center pin, just left carousel and right carousel are located center seat both sides, be equipped with first detection zone on the left carousel, first detection zone includes reverse chuck, reverse chuck with left carousel swing joint is equipped with on the reverse chuck and bears the mounting panel and bear the frame, be equipped with spacing draw-in groove on the right carousel, the position of spacing draw-in groove with the position of bearing the mounting panel is corresponding, bear the frame is located bear the top of mounting panel, bear the mounting panel and be used for placing the valve body, bear and be equipped with a plurality of guide bars in the frame, the guide bar with be connected with the adjustment structure between the frame, the guide bar bottom is connected with the contact pressure head for limiting the position of valve body, it has the opening to detect the case top.
Further, the length of the center seat is smaller than that of the bearing mounting plate, the air pump is mounted on the center seat, the air pump is connected with the oil inlet through a pipeline, threads matched with the connecting pipe are formed in the inner wall of the pipeline, a sealing gasket is sleeved on the pipeline and located in the oil inlet, and a sealing block corresponding to the oil outlet is further arranged on the right rotary plate.
Further, limiting springs are respectively connected between the center seat and the left rotary table and between the center seat and the right rotary table, hydraulic cylinders are arranged on one sides of the left rotary table and the right rotary table, the other ends of the hydraulic cylinders are arranged on sleeve plates, the sleeve plates are sleeved on the central shaft, and the sleeve plates rotate together with the rotation of the central shaft.
Further, the adjusting structure comprises an adjusting block, a moving groove and a plurality of positioning holes are formed in the bearing frame, the positioning holes are located in the moving groove, the adjusting block is located in the moving groove, the height of the adjusting block is smaller than the depth of the moving groove, a mounting hole corresponding to the positioning hole is formed in the adjusting block, an auxiliary spring is connected to the bottom end of the adjusting block and the top end of the guide rod, and the diameter of the contact pressure head is larger than that of the moving groove.
Further, the contact pressure head is made of rubber materials.
Further, guide rails are symmetrically arranged on the left rotary table, telescopic air cylinders are arranged between the symmetrically arranged guide rails, and the bottom ends of the telescopic air cylinders are connected with the bearing frame.
Further, the guide rail is embedded in the left rotary table, and the bearing frame is provided with a convex block matched with the guide rail.
Further, be equipped with the visual window board on the detection case, install the detector on the visual window board, the valve body is located when detecting the incasement, be used for monitoring detect the bubble condition in the incasement aquatic, detection case both sides are connected with the jacking cylinder.
Further, the motor is installed to reverse chuck rear end, the motor inlays in the left carousel, be equipped with first detection zone, second detection zone, third detection zone and fourth detection zone on the left carousel, and the structure of second detection zone, third detection zone and fourth detection zone with the structure of first detection zone is the same.
Based on the pressure-resistant testing device for the electro-hydraulic proportional pilot valve, the invention also provides a testing method for the pressure-resistant testing device for the electro-hydraulic proportional pilot valve, which comprises the following steps:
taking the example that only the first detection area is arranged on the left rotary disc:
step one: the valve body is placed on the bearing mounting plate of the first detection area, the telescopic cylinder pushes down the bearing frame until the contact pressure head at the bottom end of the guide rod contacted with the valve body cannot continue to move down, and then the telescopic cylinder stops working, the hydraulic cylinder works, so that the left rotary table and the right rotary table relatively move, and the bearing mounting plate moves into the limiting clamping groove;
step two: the pipeline is connected with the connecting pipe, and the sealing block blocks the oil outlet of the valve body;
step three: the central shaft rotates anticlockwise, the motor drives the reverse chuck to rotate clockwise, and the central shaft stops rotating after the valve body moves to the lowest limit position of the left rotary table;
step four: the detection box is jacked up on the jacking cylinder, so that the valve body is completely immersed in water, the air pump slowly supplies air to apply pressure, the air pump stops after a certain time, in the air supply and pressure applying process, the detector monitors the condition of air bubbles in the water in the detection box, if no air bubbles exist, the valve body is qualified, and otherwise, the valve body is unqualified.
Taking the example that the left rotary disc is provided with a first detection area, a second detection area, a third detection area and a fourth detection area:
step one: installing valve bodies on the first detection area, the second detection area and the fourth detection area, pushing down the bearing frame by the telescopic cylinder until the contact pressure head at the bottom end of the guide rod contacted with the valve bodies cannot continue to move down, stopping working of the telescopic cylinder, working of the hydraulic cylinder, enabling the left rotary disc and the right rotary disc to move relatively, and moving the bearing mounting plate into the limiting clamping groove;
step two: the central shaft rotates 90 degrees anticlockwise, the motor drives the reverse chuck to rotate clockwise, and the valve body on the second detection area detects pressure;
step three: after the detection is finished, the central shaft rotates 90 degrees anticlockwise again, the valve body on the second detection area is taken down, meanwhile, the valve body on the first detection area is detecting, and the valve body is installed on the third detection area;
step four: the central shaft rotates 90 degrees anticlockwise again, the valve body on the first detection area is taken down, meanwhile, the valve body on the fourth detection area is detecting, the valve body is arranged on the second detection area, and the valve bodies rotate in sequence;
detection principle in step three and step four: the detection box is jacked up on the jacking cylinder, so that the valve body is completely immersed in water, the air pump slowly supplies air to apply pressure, the air pump stops after a certain time, in the air supply and pressure applying process, the detector monitors the condition of air bubbles in the water in the detection box, if no air bubbles exist, the valve body is qualified, and otherwise, the valve body is unqualified.
The beneficial effects of the invention are as follows:
when a single valve is detected, the valve is fixed through the cooperation of the bearing mounting plate and the guide rod and the cooperation of the left rotary table and the right rotary table; when a plurality of valves are detected, the valves are fixed through the cooperation of the bearing mounting plate and the guide rod, the left rotary disc, the hydraulic rod and the sealing block, and when the valves are detected singly, the cooperation of the left rotary disc and the right rotary disc can play a role in fixing and can also be used for sealing, so that the operation is convenient, the accuracy of a test result is ensured, and when the valves are detected, the valves can be synchronously installed, dismounted and detected, so that the detection time is shortened, and the detection efficiency is improved;
the pressure is gradually increased in the detection process, the pressure cannot be suddenly increased, the accuracy of a detection result is ensured, the condition in the detection box is automatically monitored through the detector, automatic detection and data analysis are realized, and the efficiency and the accuracy are high.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the front view of the present invention;
FIG. 2 is a schematic illustration of an isometric construction of a valve body of the present invention;
FIG. 3 is a schematic view of the front view of the valve body of the present invention;
FIG. 4 is a schematic view of a cross-sectional A-A configuration of the present invention;
FIG. 5 is a schematic right-side view of the reversing turntable of the present invention;
FIG. 6 is a schematic view of another construction of the reversing turntable of the present invention;
FIG. 7 is a schematic view of the front view of the carriage of the present invention;
FIG. 8 is a schematic diagram of the left-hand construction of the right turntable of the present invention;
fig. 9 is an enlarged view of the portion a in fig. 9 according to the present invention;
fig. 10 is a right-view structural diagram of a left rotary table in a second embodiment of the present invention.
Marked in the figure as: 1. a mounting frame; 2. a central shaft; 3. a sleeve plate; 4. a hydraulic cylinder; 5. a left rotary disk; 6. a center seat; 7. an air pump; 8. a limit spring; 9. a right turntable; 10. a detection box; 11. a visual window panel; 12. a monitor; 13. jacking the air cylinder; 14. a base; 15. a reverse chuck; 16. a motor; 17. a third detection zone; 18. a fourth detection zone; 19. an oil inlet; 20. a valve body; 21. an oil outlet; 22. a contact ram; 23. a guide rail; 24. a telescopic cylinder; 25. a guide rod; 26. a load-bearing mounting plate; 27. a carrier; 28. positioning holes; 29. a mounting hole; 30. an auxiliary spring; 31. adjusting the block; 32. a moving groove; 33. a sealing block; 34. a second detection zone; 35. a first detection zone; 36. a limit clamping groove; 37. a connecting pipe; 38. a sealing gasket; 39. a pipe; 40. and a hydraulic rod.
Detailed Description
Example 1
A withstand voltage testing arrangement for electrohydraulic proportional pilot valve, including valve body 20, air pump 7 and detection case 10, as shown in fig. 2 and 3, be equipped with oil inlet 19 and oil-out 21 on the valve body 20, install connecting pipe 37 in the oil inlet 19, the connecting pipe 37 outer wall is equipped with the screw thread, through setting up connecting pipe 37 so that air pump 7 and valve body 20 zonulae occludens, guarantees the sealing performance of both junctions.
The air pump 7 and the oil inlet 19 are further connected through a pipe 39, and threads matched with the connecting pipe 37 are arranged on the inner wall of the pipe 39.
Because the pipeline 39 is in threaded connection with the connecting pipe 37, the pipeline 39 is sleeved with the sealing gasket 38, the sealing gasket 38 is positioned in the oil inlet 19, and the sealing performance of the joint of the pipeline 39 and the connecting pipe 37 is further ensured.
As shown in fig. 1, the detection box 10 is placed on the base 14, the top end of the detection box 10 is provided with an opening, water is contained in the detection box 10, during detection, the air pump 7 is connected with the oil inlet 19 of the valve body 20, the oil outlet 21 is in a sealed state, then the valve body 20 is placed in the detection box 10, the air pump 7 slowly conveys air into the valve body 20, and the pressure resistance of the valve body is obtained by observing the condition of bubbles in water in the detection box 10.
Since the valve body has an irregular shape, for convenience in clamping and removing the valve body, as shown in fig. 4, the left rotary disk 5 is provided with a first detection area 35.
As shown in fig. 5, the first detection area 35 includes a reverse chuck 15, a bearing mounting plate 26 and a bearing frame 27 are disposed on the reverse chuck 15, the bearing mounting plate 26 is used for placing the valve body 20, the bearing frame 27 is located above the bearing mounting plate 26, a plurality of guide rods 25 are disposed in the bearing frame 27, the bottom ends of the guide rods 25 are connected with a contact pressure head 22, and the upper and lower positions of the valve body 20 are limited by movement of the contact pressure head 22.
As shown in fig. 5 and 6, the bearing frame 27 and the reverse chuck 15 are movably installed, the left turntable 5 is symmetrically provided with guide rails 23, the bearing frame 27 is installed on the guide rails 23, telescopic air cylinders 24 are arranged between the symmetrically arranged guide rails 23, and the bottom ends of the telescopic air cylinders 24 are connected with the bearing frame 27.
In the specific embodiment, the lifting and lowering of the bearing frame 27 are regulated by the telescopic air cylinder 24, and the contact pressure head 22 is installed in the bearing frame 27, so that the contact pressure head 22 moves along with the bearing frame 27, in order to protect the surface of the valve body 20, the contact pressure head 22 is made of rubber materials, and meanwhile, the contact pressure head 22 made of rubber materials can also play a role in skid resistance.
The left and right positions of the valve body 20 are fixed by matching the left rotary disk 5 with the right rotary disk 9, as shown in fig. 8, the right rotary disk 9 is provided with a limit clamping groove 36, the position of the limit clamping groove 36 corresponds to the position of the bearing mounting plate 26, and in order to realize the sealing of the oil outlet 21 of the valve body 20, the right rotary disk 9 is also provided with a sealing block 33 corresponding to the oil outlet 21.
In a specific embodiment, after the upper and lower positions of the valve body 20 are fixed, the left turntable 5 and the right turntable 9 relatively move, one end of the bearing mounting plate 26 on the reverse chuck 15 is positioned in the limiting clamping groove 36, and the sealing block 33 corresponds to the oil outlet 21, so that the oil outlet 21 is blocked.
In order to further ensure the stability of the valve body 20, the guide rail 23 is embedded in the left rotary table 5, and the bearing frame 27 is provided with a bump matched with the guide rail 23, so that when the left rotary table 5 and the right rotary table 9 relatively move, the valve body 20 moves to one side of the left rotary table 5, and the sealing performance of the oil outlet 21 is poor, and the test result is prevented from being influenced.
As shown in fig. 1 and 4, the base 14 is symmetrically provided with a mounting frame 1, the mounting frame 1 is located at two sides of the detection box 10, the symmetrically provided mounting frame 1 is connected with a central shaft 2, a left rotary disc 5 and a right rotary disc 9 are sleeved on the central shaft 2, hydraulic cylinders 4 are installed on one sides of the left rotary disc 5 and the right rotary disc 9, the other ends of the hydraulic cylinders 4 are installed on the sleeve plate 3, the sleeve plate 3 is sleeved on the central shaft 2, and the sleeve plate 3 rotates along with the rotation of the central shaft 2.
The reverse chuck 15 is movably connected with the left rotary table 5, the motor 16 is mounted at the rear end of the reverse chuck 15, the motor 16 is embedded in the left rotary table 5, and since the left rotary table 5 is mounted on the central shaft 2, the left rotary table 5 rotates along with the central shaft 2, in order to prevent the valve body 20 from rotating along with the central shaft 2, when the central shaft 2 rotates, the motor 16 drives the reverse rotary table 15 to rotate, and the reverse rotary table 15 and the central shaft 2 synchronously rotate, and the rotation direction of the reverse rotary table 15 is opposite to that of the central shaft 2.
As shown in fig. 1, the central shaft 2 is further provided with a central seat 6, the air pump 7 is mounted on the central seat 6, the left rotary disk 5 and the right rotary disk 9 are positioned on two sides of the central seat 6, the length of the central seat 6 is smaller than that of the bearing mounting plate 26, the central seat 6 is provided with a safety protection function, the force applied to the valve body 20 by the left rotary disk 5 and the right rotary disk 9 is prevented from being too large, and the air pump 7 is convenient to mount.
Furthermore, a limit spring 8 is respectively connected between the center seat 6 and the left rotary disk 5 and between the center seat and the right rotary disk 9, so that the moving stability of the left rotary disk 5 and the right rotary disk 9 is ensured.
As shown in fig. 1, in order to obtain the test result intuitively, a visual window plate 11 is provided on the test box 10, the visual window plate 11 is a transparent plate, the detection condition in the test box 10 is seen through the visual window plate 11, a detector 12 is installed on the visual window plate 11, the detector 12 is visual detection, when the valve body 20 is located in the test box 10, the detector 12 is used for monitoring the air bubble condition in the water in the test box 10, in order to facilitate the valve body 20 to be placed in the test box 10 for detection, and two sides of the test box 10 are connected with jacking cylinders 13.
In the specific embodiment, when the valve body 20 moves to the lowest limit position of the left rotary disk 5, the lifting cylinder 13 lifts the detection box 10, so that the valve body 20 is submerged in the detection box 10 for detection.
Example two
On the basis of the first embodiment described above, an adjustment structure is connected between the guide bar 25 and the carrier 27 to further adjust the stroke of the guide bar 25.
As shown in fig. 7, the adjusting structure includes an adjusting block 31, a moving groove 32 and a plurality of positioning holes 28 are formed on the bearing frame 27, the positioning holes 28 are located in the moving groove 32, the adjusting block 31 is located in the moving groove 32, a mounting hole 29 corresponding to the positioning holes 28 is formed on the adjusting block 31, and after the position of the adjusting block 31 is determined, the adjusting block 31 is fixed in the moving groove 32 through bolting.
The height of the adjusting block 31 is smaller than the depth of the moving groove 32, the larger the distance between the bottom end of the adjusting block 31 and the bottom end of the moving groove 32 is, the higher the height of the valve body which can be fixed between the contact pressure head 22 and the bearing mounting plate 26 is, the auxiliary spring 30 is connected to the bottom end of the adjusting block 31 and the top end of the guide rod 25 so as to realize automatic resetting of the contact pressure head 22, and the diameter of the contact pressure head 22 is larger than that of the moving groove 32.
Other components and principles in this embodiment are the same as in the first embodiment.
Example III
On the basis of the second embodiment, in order to improve the detection efficiency, as shown in fig. 10, the left rotary disk 5 is further provided with a first detection area 35, a second detection area 34, a third detection area 17 and a fourth detection area 18, the structures of the second detection area 34, the third detection area 17 and the fourth detection area 18 are the same as those of the first detection area 35, the right rotary disk 9 is provided with a plurality of limit clamping grooves 36, the sealing block 33 is movably mounted on the right rotary disk 9, as shown in fig. 9, the rear end of the sealing block 33 is connected with a hydraulic rod 40, and the hydraulic rod 40 is embedded in the right rotary disk 9.
When the valve is disassembled on the corresponding detection area in operation, the hydraulic rod 40 is retracted, and the hydraulic rods 40 of other detection areas are kept in place, so that the sealing block 33 is tightly attached to the oil outlet 21.
When the first detection area 35, the second detection area 34, the third detection area 17 and the fourth detection area 18 are disposed on the left rotary disk 5, the valve body 20 is installed in the following specific embodiment: the valve bodies are arranged on the first detection area 35, the second detection area 34 and the fourth detection area 18, the central shaft 2 rotates anticlockwise by 90 degrees, the valve bodies on the second detection area 34 firstly carry out pressure detection, after detection, the central shaft 2 rotates anticlockwise by 90 degrees again, the valve bodies on the second detection area 34 are taken down, the valve bodies on the first detection area 35 are detected, the valve bodies are arranged on the third detection area 17, the central shaft 2 rotates anticlockwise by 90 degrees again, the valve bodies on the fourth detection area 18 are detected while the valve bodies on the first detection area 35 are taken down, the valve bodies are arranged on the second detection area 34, and the valve bodies circulate in sequence.
Other components and principles in this embodiment are the same as in the embodiment.
The invention also provides a test method of the withstand voltage test device for the electro-hydraulic proportional pilot valve, which comprises the following steps:
only the first detection area 35 is arranged on the left rotary disk 5:
the valve body 20 is placed on the bearing mounting plate 26 of the first detection area 35, the telescopic cylinder 24 pushes down the bearing frame 37 until the contact pressure head 22 at the bottom end of the guide rod 25 contacted with the valve body 20 cannot continue to move downwards, then the telescopic cylinder 24 stops working, the hydraulic cylinder 4 works, the left rotary table 5 and the right rotary table 9 relatively move, and the bearing mounting plate 26 moves into the limit clamping groove 36;
the pipeline 39 is connected with the connecting pipe 40, and the sealing block 33 blocks the oil outlet 21 of the valve body 20;
the central shaft 22 rotates anticlockwise, the motor 16 drives the reverse chuck 15 to rotate clockwise, and the central shaft 22 stops rotating after the valve body 20 moves to the lowest limit position of the left rotary disc 5;
the detection box 10 is lifted up by the lifting air cylinder 13, the valve body 20 is completely immersed in water, the air pump 7 supplies air slowly to apply pressure, the air pump is stopped after a certain time, in the air supply and pressure applying process, the detector 12 monitors the air bubble condition of the water in the detection box 10, if no air bubble exists, the valve body is qualified, otherwise, the valve body is unqualified.
The above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The pressure-resistant testing device for the electrohydraulic proportional pilot valve comprises a valve body, an air pump and a detection box, wherein an oil inlet and an oil outlet are formed in the valve body, and the pressure-resistant testing device is characterized in that a connecting pipe is arranged in the oil inlet, threads are formed in the outer wall of the connecting pipe, the detection box is placed on a base, mounting frames are symmetrically arranged on the base, the mounting frames are positioned on two sides of the detection box, a central shaft is connected to the symmetrically arranged mounting frames, a left rotary table, a central seat and a right rotary table are sleeved on the central shaft, the left rotary table and the right rotary table are positioned on two sides of the central seat, a first detection area is formed in the left rotary table, the first detection area comprises a reverse chuck, the reverse chuck is movably connected with the left rotary table, a bearing mounting plate and a bearing frame are arranged on the reverse chuck, a limit clamping groove is formed in the right rotary table, the position of the limit clamping groove corresponds to the position of the bearing mounting plate, the bearing frame is positioned above the bearing mounting plate, the bearing mounting plate is used for placing the valve body, a plurality of guide rods are arranged in the bearing frame, an adjusting structure is connected between the guide rods and the bearing frame, the guide rods are connected to the left rotary table and the bearing frame, the bottom end of the guide rods are connected to the guide rods and the guide rods are arranged on the two sides, the two sides of the central seat, the air pump is in the sealing pad, the sealing pad is correspondingly arranged on the left rotary table and the left rotary table, the sealing pad is in the sealing pad, the sealing pad is arranged on the air pump, the sealing pad is correspondingly arranged on the inner side of the air pump, and the sealing pad is arranged on the left side of the air pump, and the sealing pad is arranged on the side and one side and the sealing pad, and the sealing pad respectively. The sleeve plate is sleeved on the central shaft, the sleeve plate rotates along with the rotation of the central shaft, guide rails are symmetrically arranged on the left rotary table, telescopic air cylinders are arranged between the guide rails which are symmetrically arranged, the bottom ends of the telescopic air cylinders are connected with the bearing frame, a visual window plate is arranged on the detection box, a detector is arranged on the visual window plate, a valve body is arranged in the detection box and used for monitoring the condition of air bubbles in water in the detection box, jacking air cylinders are connected to two sides of the detection box, a motor is arranged at the rear end of the reverse chuck, and the motor is embedded in the left rotary table.
2. The pressure resistance test device for an electro-hydraulic proportional pilot valve according to claim 1, wherein the length of the center seat is smaller than the length of the load-bearing mounting plate.
3. The pressure-resistant testing device for the electro-hydraulic proportional pilot valve according to claim 1, wherein the adjusting structure comprises an adjusting block, a moving groove and a plurality of positioning holes are formed in the bearing frame, the positioning holes are formed in the moving groove, the adjusting block is located in the moving groove, the height of the adjusting block is smaller than the depth of the moving groove, a mounting hole corresponding to the positioning hole is formed in the adjusting block, an auxiliary spring is connected to the bottom end of the adjusting block and the top end of the guide rod, the diameter of the contact pressure head is larger than that of the moving groove, and the contact pressure head is made of rubber materials.
4. The pressure resistance test device for the electro-hydraulic proportional pilot valve according to claim 1, wherein the guide rail is embedded in the left rotary table, and the bearing frame is provided with a bump matched with the guide rail.
5. A method of using the withstand voltage test apparatus for an electro-hydraulic proportional pilot valve as claimed in claim 1, wherein only the first detection area is provided on the left rotary disk, the method comprising the steps of:
step one: the valve body is placed on the bearing mounting plate of the first detection area, the telescopic cylinder pushes down the bearing frame until the contact pressure head at the bottom end of the guide rod contacted with the valve body cannot continue to move down, and then the telescopic cylinder stops working, the hydraulic cylinder works, so that the left rotary table and the right rotary table relatively move, and the bearing mounting plate moves into the limiting clamping groove;
step two: the pipeline is connected with the connecting pipe, and the sealing block blocks the oil outlet of the valve body;
step three: the central shaft rotates anticlockwise, the motor drives the reverse chuck to rotate clockwise, and the central shaft stops rotating after the valve body moves to the lowest limit position of the left rotary table;
step four: the detection box is jacked up on the jacking cylinder, so that the valve body is completely immersed in water, the air pump slowly supplies air to apply pressure, the air pump stops after a certain time, in the air supply and pressure applying process, the detector monitors the condition of air bubbles in the water in the detection box, if no air bubbles exist, the valve body is qualified, and otherwise, the valve body is unqualified.
6. A method of using the withstand voltage test apparatus for an electro-hydraulic proportional pilot valve as claimed in claim 1, wherein the left rotary disk is provided with a first detection zone, a second detection zone, a third detection zone and a fourth detection zone, and the structures of the second detection zone, the third detection zone and the fourth detection zone are identical to those of the first detection zone, the method comprising the steps of:
step one: installing valve bodies on the first detection area, the second detection area and the fourth detection area, pushing down the bearing frame by the telescopic cylinder until the contact pressure head at the bottom end of the guide rod contacted with the valve bodies cannot continue to move down, stopping working of the telescopic cylinder, working of the hydraulic cylinder, enabling the left rotary disc and the right rotary disc to move relatively, and moving the bearing mounting plate into the limiting clamping groove;
step two: the central shaft rotates 90 degrees anticlockwise, the motor drives the reverse chuck to rotate clockwise, and the valve body on the second detection area detects pressure;
step three: after the detection is finished, the central shaft rotates 90 degrees anticlockwise again, the valve body on the second detection area is taken down, meanwhile, the valve body on the first detection area is detecting, and the valve body is installed on the third detection area;
step four: the central shaft rotates 90 degrees anticlockwise again, the valve body on the first detection area is taken down, meanwhile, the valve body on the fourth detection area is detecting, the valve body is arranged on the second detection area, and the valve bodies rotate in sequence;
detection principle in step three and step four: the detection box is jacked up on the jacking cylinder, so that the valve body is completely immersed in water, the air pump slowly supplies air to apply pressure, the air pump stops after a certain time, in the air supply and pressure applying process, the detector monitors the condition of air bubbles in the water in the detection box, if no air bubbles exist, the valve body is qualified, and otherwise, the valve body is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890003233U (en) * | 1987-07-31 | 1989-04-12 | 영도산업주식회사 | Gas container valve leak detection device |
| CN109406129A (en) * | 2018-12-10 | 2019-03-01 | 济宁鲁威液压科技股份有限公司 | A kind of extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN213456461U (en) * | 2020-11-06 | 2021-06-15 | 上海富斯鹏科技有限公司 | Pressure testing detection device of pressure transmitter |
| CN113532844A (en) * | 2021-07-16 | 2021-10-22 | 永高股份有限公司 | Ball valve torsion and durability detection device |
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2023
- 2023-03-15 CN CN202310249033.9A patent/CN116183209B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890003233U (en) * | 1987-07-31 | 1989-04-12 | 영도산업주식회사 | Gas container valve leak detection device |
| CN109406129A (en) * | 2018-12-10 | 2019-03-01 | 济宁鲁威液压科技股份有限公司 | A kind of extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN213456461U (en) * | 2020-11-06 | 2021-06-15 | 上海富斯鹏科技有限公司 | Pressure testing detection device of pressure transmitter |
| CN113532844A (en) * | 2021-07-16 | 2021-10-22 | 永高股份有限公司 | Ball valve torsion and durability detection device |
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| CN116183209A (en) | 2023-05-30 |
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