Hydraulic oil cylinder pressure test detection device

Abstract

The utility model discloses a hydraulic oil cylinder pressure test detection device, which relates to the technical field of hydraulic oil cylinder detection, and comprises a box body, a PLC (Programmable Logic Controller) control panel and a driving mechanism, a partition plate is fixedly arranged in the box body and divides the box body into a mounting cavity and an oil storage cavity, and an upper U-shaped frame and a lower U-shaped frame are arranged above the box body at intervals along the vertical direction; a top plate is fixedly mounted at the top of the upper U-shaped frame, and the lower U-shaped frame is fixedly connected with the box body; a plurality of through holes are formed in the tops of the two U-shaped frames in the vertical direction, the through holes are evenly distributed in the three side walls of the U-shaped frames, and lifting rods in transmission connection with a driving mechanism are rotationally installed in the through holes of the lower U-shaped frame. According to the hydraulic oil cylinder pressure test detection device, through cooperative arrangement of the driving mechanism, the lifting rod, the reciprocating driving assembly, the clamping assembly and the pre-pressing oil cylinder, oil cylinders under different strokes and different pressures can be detected, the actual use conditions of the oil cylinder to be detected are fully simulated, and the sealing performance of the oil cylinder to be detected is better detected.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinder detection, in particular to a hydraulic oil cylinder pressure test detection device. Background Art

[0002] The main function of the existing pressure test device is to perform no-load pressure test and pressurized test on the assembled hydraulic cylinder. It can only realize the test of the two positions of the cylinder "О stroke" or "full stroke". Although it can also test the performance status of the seal, it cannot meet the requirements of some dynamic simulation tests with relatively large on-site loads.

[0003] Therefore, it is necessary to propose a hydraulic cylinder pressure test detection device to solve the above problems. Utility Model Content

[0004] Technical problem to be solved: The purpose of the utility model is to provide a hydraulic cylinder pressure test detection device to solve the problem that the existing pressure test device proposed in the above background technology can only realize the test of the cylinder's "О stroke" or "full stroke" two positions, and cannot meet the requirements of some dynamic simulation tests with relatively large on-site loads.

[0005] Technical solution: To achieve the above purpose, the utility model is implemented through the following technical solutions: a hydraulic oil cylinder pressure test detection device, including a box body, a PLC control panel and a driving mechanism, a partition is fixedly installed in the box body, the partition divides the box body into an installation cavity and an oil storage cavity, and an upper and lower U-shaped frames are vertically spaced above the box body, a top plate is fixedly installed on the top of the upper U-shaped frame, and the lower U-shaped frame is fixedly connected to the box body; the tops of the two U-shaped frames are vertically opened with a plurality of through holes, and the plurality of through holes are evenly distributed on the three side walls of the U-shaped frames, and lifting rods connected to the driving mechanism are rotatably installed in the through holes of the lower U-shaped frame, and the top ends of the plurality of lifting rods extend into the through holes corresponding to the upper U-shaped frames and are threadedly connected thereto; a device for clamping the oil cylinder to be tested is provided in the upper U-shaped frame and a tube connecting the discharging opening of the pump with a check valve in it, and ...

[0006] Preferably, the driving mechanism is arranged in the installation cavity, and the driving mechanism includes a motor, a transmission belt and a pulley sleeved on the lifting rod. The motor is transmission-connected to one of the lifting rods, and two adjacent pulleys are transmission-connected via a transmission belt.

[0007] Preferably, the clamping assembly includes a driving motor fixedly mounted on the upper U-shaped frame, and also includes a sliding rod and a bidirectional screw installed in the upper U-shaped frame along the transverse direction. The driving motor is transmission-connected to the bidirectional screw. Two clamping plates are symmetrically slidably mounted on the sliding rod along the transverse direction, and the two clamping plates are respectively threadedly connected to the threaded sections of the bidirectional screws on adjacent sides.

[0008] Preferably, the two clamping plates are both arranged horizontally, and arc grooves are vertically provided at the tops of adjacent sides of the two clamping plates, and the arc grooves are arranged concentrically with the pre-stressing cylinder.

[0009] Preferably, the reciprocating drive assembly includes a synchronous motor fixedly mounted on the lower U-shaped frame, a cam is mounted on the output shaft of the synchronous motor, a rotating shaft is fixedly mounted on the other end of the cam, a connecting rod is rotatably mounted on the rotating shaft, and the other end of the connecting rod is hinged to the piston.

[0010] Preferably, a fixing block is fixedly mounted on the output end of the pre-stressing oil cylinder, and an anti-slip pad is provided on the fixing block.

[0011] Beneficial effects: Compared with the prior art, the utility model provides a hydraulic oil cylinder pressure test detection device, which has a unique structure and is easy to use. During the detection, the oil cylinder to be tested is placed between the two arc grooves, and the bottom of the oil cylinder is made to collide with the top plate, and then the driving motor is started, and the driving motor drives the bidirectional screw to rotate, thereby driving the two clamping plates to clamp the oil cylinder to be tested, and then the piston rod of the oil cylinder to be tested is extended to a certain length, and the motor is started. The motor drives the three lifting rods to rotate at the same time through the belt transmission, so that the piston rod of the oil cylinder to be tested is collided with the piston rod of the pre-pressure oil cylinder;

[0012] At this time, the pressure is preset on the control panel, and the control panel controls the reciprocating drive assembly to drive the piston to move up and down in the connecting tube, and continuously injects hydraulic oil into the pre-pressure cylinder. When the pressure transmitter detects that the pressure in the pre-pressure cylinder is the same as the preset pressure, the synchronous motor stops moving, and then observes the pressure resistance and performance of the cylinder to be tested under the preset pressure, and then adjusts the preset pressure multiple times to observe the state of the cylinder to be tested under different preset pressures; adjusts the stroke of the piston rod of the cylinder to be tested again, and performs multiple pressure tests on the cylinders at different strokes. Through the coordinated setting of the driving mechanism, lifting rod, reciprocating drive assembly, clamping assembly and pre-pressure cylinder, cylinders at different strokes and pressures can be tested, which fully simulates the actual use conditions of the cylinder to be tested and better tests its sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional front view schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a three-dimensional side view schematic diagram of the structure of the utility model;

[0015] Figure 3 It is an internal schematic diagram of the box structure of the utility model.

[0016] In the figure: 1. Box body; 2. Partition; 3. U-shaped frame; 4. Top plate; 5. Lifting rod; 6. Pulley; 7. Transmission belt; 8. Motor; 9. Clamping plate; 10. Sliding rod; 11. Bidirectional screw; 12. Driving motor; 13. Pre-pressure cylinder; 14. Pressure transmitter; 15. Fixed block; 16. Oil outlet pipe; 17. Oil inlet pipe; 18. Connecting tube; 19. Connecting rod; 20. Cam; 21. Synchronous motor; 22. Control panel. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment 1: This embodiment 1 provides a hydraulic cylinder pressure test detection device, which is directly improved on the existing pressure test device and has a unique structure. Please refer to Figure 1-3 As shown, it includes a box body 1, a PLC control panel 22 and a driving mechanism. A partition 2 is fixedly installed in the box body 1, and the partition 2 divides the box body 1 into an installation cavity and an oil storage cavity. Two upper and lower U-shaped frames 3 are vertically spaced above the box body 1, and a top plate 4 is fixedly installed on the top of the upper U-shaped frame, and the lower U-shaped frame is fixedly connected to the box body 1; the tops of the two U-shaped frames 3 are vertically opened with multiple through holes, and the multiple through holes are evenly distributed on the three side walls of the U-shaped frame 3. Lifting rods 5 that are transmission-connected to the driving mechanism are rotatably installed in the through holes of the lower U-shaped frame. There are various ways to install the lifting rods 5 in the through holes of the lower U-shaped frame, for example: the lifting rods 5 are rotatably mounted in the through holes of the lower U-shaped frame through bearings, and the top ends of the multiple lifting rods 5 extend into the through holes of the corresponding upper U-shaped frames and are threadedly connected thereto.

[0019] There are many ways to thread the lifting rod 5 and the upper U-shaped frame, for example: the upper part of the lifting rod 5 is a threaded section, a screw barrel is installed in the through hole of the upper U-shaped frame, and the screw barrel is threadedly connected to the threaded section of the lifting rod 5; the driving mechanism is arranged in the installation cavity, the driving mechanism includes a motor 8, a transmission belt 7 and a pulley 6 installed on the lifting rod 5, the motor 8 is transmission-connected to one of the lifting rods 5, and the two adjacent pulleys 6 are transmission-connected through the transmission belt 7; there are many ways to transmission-connect the motor 8 and the lifting rod 5, for example: the motor 8 is fixedly installed on the side wall of the installation box, the output shaft of the motor 8 is fixedly connected to the lifting rod 5 through a coupling, the motor 8 drives multiple lifting rods 5 to rotate synchronously through belt transmission, and drives the upper U-shaped frame to move up and down through the threaded connection between the threaded section of the lifting rod 5 and the screw barrel in the through hole of the upper U-shaped frame.

[0020] A clamping assembly for clamping the oil cylinder to be tested is provided in the upper U-shaped frame, and a pre-pressure assembly for applying pressure to the oil cylinder to be tested is provided in the lower U-shaped frame; the clamping assembly includes a drive motor 12 fixedly mounted on the upper U-shaped frame, and also includes a slide bar 10 and a bidirectional screw 11 rotatably mounted in the upper U-shaped frame along the transverse direction, the drive motor 12 is transmission-connected with the bidirectional screw 11, and two clamping plates 9 are symmetrically and slidingly sleeved on the slide bar 10 along the transverse direction, and the two clamping plates 9 are respectively threadedly connected with the threaded sections of the bidirectional screw 11 on the adjacent sides; there are various ways of transmission connection between the drive motor 12 and the bidirectional screw 11, for example: threaded holes are opened in the transverse direction on the two clamping plates 9, one end of the bidirectional screw 11 passes through the threaded hole on the adjacent side and is rotationally connected to the side wall of the upper U-shaped frame, and the other end of the bidirectional screw 11 passes through the threaded hole on the adjacent side and the side wall of the upper U-shaped frame in turn, and is fixedly connected to the output shaft of the drive motor 12 through a coupling.

[0021] The two clamping plates 9 are both arranged horizontally, and the tops of the adjacent sides of the two clamping plates 9 are provided with arc grooves in the vertical direction, and the arc grooves are arranged concentrically with the prestressing cylinder 13; the prestressing assembly includes a reciprocating drive assembly, a prestressing cylinder 13, a connecting tube 18, an oil outlet pipe 16 and an oil inlet pipe 17, the prestressing cylinder 13 and the connecting tube 18 are both fixedly installed on the top of the box body 1, and the prestressing cylinder 13 and the connecting tube 18 are connected to the bottom of the oil storage chamber through the oil outlet pipe 16 and the oil inlet pipe 17 respectively.

[0022] An electromagnetic valve and a one-way liquid inlet valve are respectively provided in the oil outlet pipe 16 and the oil inlet pipe 17. A piston is axially slidably mounted in the connecting tube 18 and is transmission-connected to the reciprocating drive assembly. A pressure transmitter 14 for detecting the cylinder pressure is provided on the pre-stressing cylinder 13. The drive mechanism, the reciprocating drive assembly, the electromagnetic valve and the pressure transmitter 14 are all control-connected to the control panel 22. The oil inlet of the pre-stressing cylinder 13 is connected to the bottom of the connecting tube 18, and a one-way liquid inlet valve is provided in the oil inlet of the pre-stressing cylinder 13.

[0023] There are many ways to connect the oil inlet of the pre-stressing cylinder 13 with the bottom of the connecting tube 18, for example: the bottom of the connecting tube 18 is connected with a connecting pipe, the other end of the connecting pipe is connected with the oil inlet of the pre-stressing cylinder 13, the reciprocating drive assembly includes a synchronous motor 21 fixedly mounted on the lower U-shaped frame, a cam 20 is mounted on the output shaft of the synchronous motor 21, a rotating shaft is fixedly mounted on the other end of the cam 20, a connecting rod 19 is rotatably mounted on the rotating shaft, and the other end of the connecting rod 19 is hinged to the piston; the synchronous motor 21 drives the cam 20 to rotate, and the cam 20 drives one end of the connecting rod 19 to rotate in a circle, so that the piston moves up and down in the connecting tube 18, and then the hydraulic oil is continuously injected into the pre-stressing cylinder 13.

[0024] When we use this detection device to test the pressure of the cylinder, first put the cylinder to be tested between the two arc grooves, and make the bottom of the cylinder contact with the top plate 4, and then start the drive motor 12. The drive motor 12 drives the bidirectional screw 11 to rotate, thereby driving the two clamping plates 9 to move inward toward each other at the same time through the threaded connection to clamp the cylinder to be tested, and then extend the piston rod of the cylinder to be tested to a certain length, start the motor 8, and the motor 8 drives the three lifting rods 5 to rotate at the same time through the belt drive, and drives the upper U-shaped frame to move downward through the threaded connection until the piston rod of the cylinder to be tested contacts the piston rod of the preload cylinder 13.

[0025] At this time, the pressure is preset on the control panel 22, and the control panel 22 controls the synchronous motor 21 to move. The synchronous motor 21 drives the cam 20 to rotate, and the cam 20 drives one end of the connecting rod 19 to rotate in a circle, so that the piston moves up and down in the connecting tube 18, and then the hydraulic oil is continuously injected into the pre-stressing cylinder 13. When the pressure transmitter 14 detects that the pressure in the pre-stressing cylinder 13 is the same as the preset pressure, the synchronous motor 21 stops moving, and then observes the pressure resistance state and performance of the cylinder to be tested under the preset pressure, and then adjusts the preset pressure multiple times to observe the state of the cylinder to be tested under different preset pressures; adjusts the stroke of the piston rod of the cylinder to be tested again, and performs multiple pressure tests on the cylinder under different strokes, so as to fully simulate the actual use conditions of the cylinder to be tested and better detect its sealing performance. After the detection is completed, open the solenoid valve, and the hydraulic oil in the pre-stressing cylinder 13 flows back to the oil storage chamber through the oil outlet pipe 16.

[0026] Embodiment 2: Embodiment 2 is different from Embodiment 1 in that Figure 1 As shown, a fixing block 15 is fixedly mounted on the output end of the pre-pressing oil cylinder 13 , and an anti-skid pad is provided on the fixing block 15 , so that the pre-pressing oil cylinder 13 can apply pressure to the oil cylinder to be tested.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder pressure test device, comprising a housing (1), a PLC control panel (22) and a drive mechanism, characterized in that: A partition (2) is fixedly installed in the box body (1), and the partition (2) divides the box body (1) into an installation cavity and an oil storage cavity. Two upper and lower U-shaped frames (3) are arranged vertically at intervals above the box body (1), and a top plate (4) is fixedly installed on the top of the upper U-shaped frame, and the lower U-shaped frame is fixedly connected to the box body (1); the tops of the two U-shaped frames (3) are vertically provided with a plurality of through holes, and the plurality of through holes are evenly distributed on the three side walls of the U-shaped frame (3); lifting rods (5) connected to the driving mechanism are rotatably installed in the through holes of the lower U-shaped frame, and the top ends of the plurality of lifting rods (5) extend into the through holes of the corresponding upper U-shaped frames and are threadedly connected thereto; a clamping assembly for clamping the oil cylinder to be tested is arranged in the upper U-shaped frame, and a pre-pressing assembly for applying pressure to the oil cylinder to be tested is arranged in the lower U-shaped frame; the pre-pressing assembly comprises a reciprocating drive assembly, a pre-pressing oil cylinder (13) , a connecting tube (18), an oil outlet pipe (16) and an oil inlet pipe (17); the pre-pressing oil cylinder (13) and the connecting tube (18) are fixedly mounted on the top of the box body (1), and the bottoms of the pre-pressing oil cylinder (13) and the connecting tube (18) are respectively connected to the bottom of the oil storage chamber through the oil outlet pipe (16) and the oil inlet pipe (17); a solenoid valve and a one-way liquid inlet valve are respectively arranged in the oil outlet pipe (16) and the oil inlet pipe (17); a piston which is transmission-connected to the reciprocating drive assembly is axially slidably sleeved in the connecting tube (18); a pressure transmitter (14) for detecting the cylinder pressure is arranged on the pre-pressing oil cylinder (13); the driving mechanism, the reciprocating drive assembly, the solenoid valve and the pressure transmitter (14) are all control-connected to the control panel (22); the oil inlet of the pre-pressing oil cylinder (13) is connected to the bottom of the connecting tube (18), and a one-way liquid inlet valve is arranged in the oil inlet of the pre-pressing oil cylinder (13).

2. A hydraulic cylinder pressure test detection device according to claim 1, characterized in that: The driving mechanism is arranged in the installation cavity, and comprises a motor (8), a transmission belt (7), and a pulley (6) sleeved on the lifting rod (5); the motor (8) is transmission-connected to one of the lifting rods (5), and two adjacent pulleys (6) are transmission-connected via the transmission belt (7).

3. A hydraulic cylinder pressure test detection device according to claim 1, characterized in that: The clamping assembly comprises a driving motor (12) fixedly mounted on the upper U-shaped frame, and also comprises a sliding rod (10) and a bidirectional screw (11) rotatably mounted in the upper U-shaped frame in the transverse direction, the driving motor (12) being transmission-connected to the bidirectional screw (11), two clamping plates (9) being symmetrically slidably sleeved on the sliding rod (10) in the transverse direction, and the two clamping plates (9) are respectively threadedly connected to the threaded sections of the bidirectional screws (11) on adjacent sides.

4. A hydraulic cylinder pressure test detection device according to claim 3, characterized in that: The two clamping plates (9) are both arranged horizontally, and arc-shaped grooves are vertically provided at the tops of the adjacent sides of the two clamping plates (9), and the arc-shaped grooves are arranged concentrically with the pre-pressure cylinder (13).

5. The hydraulic cylinder pressure testing device according to claim 1, characterized in that: The reciprocating drive assembly comprises a synchronous motor (21) fixedly mounted on the lower U-shaped frame, a cam (20) being sleeved on the output shaft of the synchronous motor (21), a rotating shaft being fixedly mounted on the other end of the cam (20), a connecting rod (19) being rotatably sleeved on the rotating shaft, and the other end of the connecting rod (19) being hinged to the piston.

6. A hydraulic cylinder pressure testing device according to claim 1, characterized in that: A fixing block (15) is fixedly mounted on the output end of the pre-pressing oil cylinder (13), and an anti-slip pad is provided on the fixing block (15).

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