Hydraulic element air tightness detection device

Abstract

The utility model relates to the technical field of hydraulic cylinder detection, in particular to an air tightness detection device for a hydraulic element. The fixing device is arranged in the fixing frame, the fixing device comprises a detection frame, the detection frame is connected to the inner side of the fixing frame in an up-down sliding mode, a bottom supporting plate is fixedly connected to the lower portion of the detection frame, a rotating disc is rotationally connected to the bottom supporting plate, and a top supporting plate is connected to the interior of the detection frame in an up-down sliding mode; a linear pushing device used for pushing the top supporting plate to slide in the direction close to or away from the bottom supporting plate is arranged in the detection frame. The problem that a traditional universal clamp is difficult to meet the dual requirements of quick positioning and stable clamping is effectively solved; the device is convenient to clamp and fix, and can effectively improve the detection probability.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinder detection, in particular to an airtightness detection device for hydraulic components. Background Technique

[0002] In the field of precision hydraulic component manufacturing, airtightness detection, as the core link of product quality control, plays a decisive role in ensuring the stable operation of the hydraulic system. As the power execution core of the hydraulic system, the airtight performance of the cylinder barrel of the hydraulic cylinder is directly related to the working efficiency, operation stability and service life of the system. At present, the mainstream airtightness detection methods in the industry mainly include the air pressure detection method and the immersion detection method (bubble method). Among them, the immersion detection method has become the preferred technical solution for the leakage detection of the cylinder barrel of the hydraulic cylinder due to its significant advantages of strong visualization and high detection accuracy.

[0003] Since the cylinder barrels of hydraulic cylinders generally adopt a long cylinder structure design, and there are large differences in key dimension parameters such as pipe diameter and length for different specifications of products, traditional general-purpose jigs are difficult to meet the dual requirements of rapid positioning and stable clamping. During the actual detection process, the phenomena of cylinder barrel displacement or inclination caused by unstable clamping often occur, which not only interferes with the clear observation of the bubble trajectory, but also may cause deviation of the detection result, thus affecting the accuracy and reliability of product quality judgment. Content of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an airtightness detection device for hydraulic components, which effectively solves the problem that traditional general-purpose jigs are difficult to meet the dual requirements of rapid positioning and stable clamping.

[0005] The technical solution solved by the utility model is an airtightness detection device for hydraulic components, including:

[0006] A detection box body, with one side of the detection box body being open;

[0007] A fixing frame, fixedly connected to the inner side wall of the detection box body;

[0008] A fixing device, arranged inside the fixing frame for fixing the cylinder barrel. The fixing device includes a detection frame, the detection frame is slidably connected up and down inside the fixing frame, a bottom support plate is fixedly connected below the detection frame, a rotating disk is rotatably connected to the bottom support plate, a top support plate is slidably connected up and down inside the detection frame, and a linear pushing device for pushing the top support plate to slide in a direction close to or away from the bottom support plate is arranged inside the detection frame;

[0009] A clamping structure is provided on the bottom support plate. The clamping structure includes a sliding sleeve that is slidably connected up and down at the central position of the rotating disk. One end of the sliding sleeve close to the top support plate is fixedly connected with a sealing cover plate. An elastic member is provided between the end of the sliding sleeve far from the sealing cover plate and the rotating disk. A plurality of arc-shaped clamping members are rotatably connected to the rotating disk and are circumferentially distributed along the circumference of the center of the rotating disk. The lower end of the arc-shaped clamping member abuts against the lower end surface of the sealing cover plate, and a torsion spring is provided between the arc-shaped clamping member and the bottom support plate;

[0010] A top pressing plate is rotatably connected to the top support plate;

[0011] An air inlet pipe is provided at the central position of the sealing cover plate;

[0012] A detection driving device is provided on the fixed frame and is used to push the detection frame to slide in a direction close to or away from the interior of the detection box body.

[0013] Further, it further includes:

[0014] Top support claws. A plurality of the top support claws are circumferentially distributed along the central position of the top pressing plate, and the top support claws are fixedly connected to the side of the top pressing plate close to the bottom support plate; The top support claws are inclined on the top pressing plate.

[0015] Further, it further includes:

[0016] A sealing plug. The sealing plug is provided on the sealing cover plate, and the sealing plug is conical; The sealing plug is provided with a hole in the middle, and the air inlet pipe is provided at the hole position of the sealing plug.

[0017] Further, it further includes:

[0018] A clamping plate. The clamping plate is rotatably connected to the top end of the arc-shaped clamping member, and the clamping plate is arc-shaped. A plurality of uniformly distributed rubber blocks are fixedly connected to the inner side wall of the clamping plate.

[0019] Further, the linear pushing device includes a threaded rod rotatably connected inside the detection frame. The top support plate is threadedly connected to the threaded rod. The top end of the threaded rod is fixedly connected with a driving disk, and a pushing handle is fixedly connected to the driving disk.

[0020] Further, it further includes:

[0021] A guiding structure. The guiding structure includes a vertical guiding groove vertically opened on the fixed frame and an inclined guiding groove inclinedly opened on the fixed frame;

[0022] The upper and lower ends of the detection frame are respectively fixedly connected with a top guide shaft and a bottom guide shaft, and the top guide shaft and the bottom guide shaft are respectively slidably connected inside the vertical guide groove and the inclined guide groove.

[0023] Furthermore, the detection driving device includes a pushing hydraulic cylinder fixedly connected to the fixed frame, and the extending end of the pushing hydraulic cylinder is rotatably connected to the top guide shaft.

[0024] Furthermore, a driving wheel is rotatably connected to the top support plate, a belt is sleeved between the driving wheel and the top pressing plate, and a driving motor for driving the driving wheel to rotate is fixedly installed on the top support plate.

[0025] The beneficial effects of the present utility model are as follows:

[0026] The present utility model solves the problem that traditional general fixtures are difficult to meet the dual requirements of rapid positioning and stable clamping by adding a detection box body, a fixed frame, a detection frame, a bottom support plate, a rotating disk, a top support plate, a sealing cover plate, an elastic member, an arc-shaped clamping member, a torsion spring, a top pressing plate and an air inlet pipe;

[0027] By adding a vertical guide groove, an inclined guide groove, a top guide shaft and a bottom guide shaft, the vertical clamping cylinder is realized, and then through the guiding structure, the cylinder is moved to a horizontal state for facilitating the detection of the cylinder, and thus it is convenient to detect and install the cylinder to be detected;

[0028] The present utility model is convenient for clamping and fixing, and can effectively improve the detection probability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings according to these drawings without creative efforts.

[0030] Figure 1 is the overall installation schematic diagram of the present utility model;

[0031] Figure 2 is the schematic diagram of the use state of the present utility model;

[0032] Figure 3 is the schematic diagram of the detection frame of the present utility model;

[0033] Figure 4 is the schematic diagram of the clamping structure of the present utility model;

[0034] Figure 5 is the schematic diagram of the clamping plate of the present utility model;

[0035] Figure 6 It is a schematic diagram of the top support plate of the utility model.

[0036] Figure 7 It is a schematic cross-sectional view of the detection box body of the utility model.

[0037] In the figure, 1. Detection box body; 2. Fixed frame; 3. Detection frame; 4. Bottom support plate; 5. Rotating disk; 6. Top support plate; 7. Sealing cover plate; 8. Elastic member; 9. Arc-shaped clamping member; 10. Top pressing plate; 11. Intake pipeline; 12. Top support claw; 13. Sealing plug; 14. Clamping plate; 15. Rubber block; 16. Threaded rod; 17. Driving disk; 18. Pushing handle; 19. Vertical guide groove; 20. Inclined guide groove; 21. Top guide shaft; 22. Bottom guide shaft; 23. Pushing hydraulic cylinder; 24. Driving wheel; 25. Belt; 26. Driving motor; 27. Sliding sleeve. Specific implementation mode

[0038] Now, the technical solution of this embodiment will be further elaborated in combination with the drawings and embodiments. Embodiment

[0039] Referring to the attached Figures 1-6 As shown, a hydraulic component airtightness detection device includes:

[0040] A detection box body 1, with one side of the detection box body 1 being open, and the detection box body 1 is used to hold water for airtightness detection;

[0041] A fixed frame 2, fixedly connected to the inner side wall of the detection box body 1;

[0042] A fixing device, arranged inside the fixed frame 2 for fixing the cylinder barrel. The fixing device includes a detection frame 3, the detection frame 3 is slidably connected up and down inside the fixed frame 2, a bottom support plate 4 is fixedly connected below the detection frame 3, a rotating disk 5 is rotatably connected to the bottom support plate 4, a top support plate 6 is slidably connected up and down inside the detection frame 3, and a linear pushing device for pushing the top support plate 6 to slide in a direction close to or away from the bottom support plate 4 is arranged inside the detection frame 3;

[0043] The linear pushing device includes a threaded rod 16 rotatably connected inside the detection frame 3, the top support plate 6 is threadedly connected to the threaded rod 16, a driving disk 17 is fixedly connected to the top end of the threaded rod 16, and a pushing handle 18 is fixedly connected to the driving disk 17.

[0044] The clamping structure is arranged on the bottom support plate 4. The clamping structure includes a sliding sleeve 27 that is slidably connected up and down at the central position of the rotating disk 5. A sliding limit hole that is slidably connected to the sliding sleeve 27 is provided at the central position of the rotating disk 5. The inside of the sliding sleeve 27 is hollow. A sealing cover plate 7 is fixedly connected to one end of the sliding sleeve 27 close to the top support plate 6. An elastic member 8 is arranged between the end of the sliding sleeve 27 away from the sealing cover plate 7 and the rotating disk 5. A top plate is fixedly connected to the end of the sliding sleeve 27 away from the sealing cover plate 7. The elastic member 8 is arranged between the top plate and the rotating disk 5. In the initial state, the elastic member 8 pulls the sealing cover plate 7 and pushes it in the direction close to the top support plate 6. A plurality of arc-shaped clamping members 9 that are circumferentially distributed along the center of the rotating disk 5 are rotatably connected to the rotating disk 5. A rotating shaft is fixedly connected to the rotating disk 5. A rotating hole that is rotatably connected to the rotating shaft is provided at the lower end of the arc-shaped clamping member 9. The lower end of the arc-shaped clamping member 9 abuts against the lower end face of the sealing cover plate 7. And a torsion spring is arranged between the arc-shaped clamping member 9 and the bottom support plate 4. In the initial state, under the action of the torsion spring, the arc-shaped clamping member 9 is pushed in the direction away from the central position of the rotating disk 5, and the lower end of the arc-shaped clamping member 9 contacts the lower end of the sealing cover plate 7;

[0045] The top pressing plate 10 is rotatably connected to the top support plate 6;

[0046] The sealing plug 13 is arranged on the sealing cover plate 7. The sealing plug 13 is arranged in a conical shape; A hole is provided in the middle of the sealing plug 13. The air inlet pipe 11 is arranged at the opening position of the sealing plug 13;

[0047] The air inlet pipe 11 is arranged at the central position of the sealing cover plate 7, and the sliding sleeve 27 is sleeved on the air inlet pipe 11 for injecting gas into the cylinder;

[0048] The detection driving device is arranged on the fixed frame 2. In this embodiment, the detection driving device uses a hydraulic cylinder to push the detection frame 3 to slide in the direction close to or away from the inside of the detection box body 1.

[0049] In the specific implementation of this embodiment, there is an oil inlet hole on the existing hydraulic cylinder barrel, and the oil inlet hole of the cylinder barrel is blocked before detection;

[0050] During detection, the open end of the cylinder barrel is placed downward on the sealing cover plate 7. At this time, the sealing plug 13 is inserted into the opening of the cylinder barrel. Subsequently, the driving handle 18 is pushed to rotate the driving disk 17. The threaded rod 16 is driven to rotate by the driving disk 17. The threaded rod 16 drives the top support plate 6 to slide downward on the detection frame 3. After the top pressing plate 10 contacts the other end of the cylinder barrel, the top support plate 6 pushes the cylinder barrel in the direction close to the rotating disk 5, compressing the elastic member 8;

[0051] When the sealing cover plate 7 is pushed towards the rotating disk 5, the sealing cover plate 7 pushes the lower end of the arc-shaped clamping member 9 downward. At this time, the upper end of the arc-shaped clamping member 9 is pushed towards the direction close to the cylinder barrel until the upper end of the arc-shaped clamping member 9 fits against the outer wall of the cylinder barrel, thereby fixing the cylinder barrel in the current position, so as to realize the operation of quickly fixing the cylinder barrel. At this time, the cylinder barrel is fixed between the top pressing plate 10 and the sealing cover plate 7, and the opening of the cylinder barrel is blocked by the sealing plug 13, so as to seal the opening of the cylinder barrel;

[0052] After being fixed, the detection driving device is used to push the detection frame 3 into the detection box body 1, so as to realize the airtightness detection of the cylinder barrel. During the detection, the top pressing plate 10 is rotated to make the cylinder barrel drive the rotating disk 5 to rotate at the same time, so as to realize the rotation of the cylinder barrel on the detection frame 3 and facilitate the detection.

[0053] Furthermore, it also includes:

[0054] Top supporting claws 12, a plurality of top supporting claws 12 are circumferentially distributed along the central position of the top pressing plate 10, and the top supporting claws 12 are fixedly connected to the side of the top pressing plate 10 close to the bottom supporting plate 4; The top supporting claws 12 are inclined on the top pressing plate 10.

[0055] During use, the open end of the cylinder barrel is placed downward on the sealing cover plate 7, and the top supporting plate 6 is pushed towards the direction close to the sealing cover plate 7, so that the top supporting claws 12 fit against the upper end of the cylinder barrel. Subsequently, the inclined top supporting claws 12 guide the upper end of the cylinder barrel to make the axis of the cylinder barrel coincide with the axis of the top pressing plate 10, so as to make the fixation of the cylinder barrel more stable.

[0056] Furthermore, it also includes:

[0057] Clamping plate 14, the clamping plate 14 is rotatably connected to the top end of the arc-shaped clamping member 9, and the clamping plate 14 is arc-shaped. A plurality of uniformly distributed rubber blocks 15 are fixedly connected to the inner side wall of the clamping plate 14, so as to increase the friction force and improve the stable support. Embodiment

[0058] Referring to the attached drawings of the specification Figure 7 It also includes:

[0059] Guide structure, the guide structure includes a vertical guide groove 19 vertically opened on the fixed frame 2 and an inclined guide groove 20 inclinedly opened on the fixed frame 2;

[0060] The upper and lower ends of the detection frame 3 are respectively fixedly connected with a top guide shaft 21 and a bottom guide shaft 22, and the top guide shaft 21 and the bottom guide shaft 22 are respectively slidably connected inside the vertical guide groove 19 and the inclined guide groove 20.

[0061] The detection driving device includes a pushing hydraulic cylinder 23 fixedly connected to the fixing frame 2, and the extending end of the pushing hydraulic cylinder 23 is rotatably connected to the top guiding shaft 21.

[0062] In the specific implementation of this embodiment, after the cylinder barrel is fixed between the top pressing plate 10 and the sealing cover plate 7, the pushing hydraulic cylinder 23 pushes the top guiding shaft 21 to slide downward along the vertical guiding groove 19. At this time, the bottom guiding shaft 22 slides downward along the inclined guiding groove 20 until the detection frame 3 is horizontally immersed into the detection box body 1, so as to facilitate the observation of the cylinder barrel to be detected. Embodiment

[0063] A driving wheel 24 is rotatably connected to the top support plate 6, a belt 25 is sleeved between the driving wheel 24 and the top pressing plate 10, and a driving motor 26 for driving the driving wheel 24 to rotate is fixedly installed on the top support plate 6;

[0064] In the specific implementation of this embodiment, when the detection frame 3 is horizontally immersed into the detection box body 1, the driving motor 26 is located above the water surface. The driving motor 26 is started, and the top pressing plate 10 is driven to rotate through the belt 25. When the top pressing plate 10 rotates, the cylinder barrel to be detected and the rotating disk 5 rotate synchronously.

[0065] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A hydraulic component air tightness detection device, characterized in that: include: A detection box, one side of which is opened; A fixing frame fixedly connected to the inner wall of the detection box; A fixing device is arranged inside the fixing frame for fixing the cylinder, the fixing device includes a detection frame, the detection frame is connected to the inner side of the fixing frame by sliding up and down, a bottom support plate is fixedly connected below the detection frame, a rotating disk is rotatably connected to the bottom support plate, a top support plate is connected to the detection frame by sliding up and down, and a linear pushing device is arranged inside the detection frame for pushing the top support plate to slide in a direction close to or away from the bottom support plate; A clamping structure is arranged on the bottom support plate, the clamping structure comprises a sliding sleeve connected to the center position of the rotating disk in an up-and-down sliding manner, one end of the sliding sleeve close to the top support plate is fixedly connected to a sealing cover plate, an elastic member is arranged between the end of the sliding sleeve away from the sealing cover plate and the rotating disk, a plurality of arc-shaped clamping members distributed along the central circumference of the rotating disk are rotatably connected to the rotating disk, the lower end of the arc-shaped clamping member abuts against the lower end surface of the sealing cover plate, and a torsion spring is arranged between the arc-shaped clamping member and the bottom support plate; A top pressing plate, the top pressing plate being rotatably connected to the top supporting plate; An air intake duct is arranged at the center of the sealing cover plate; The detection driving device is arranged on the fixing frame and is used for pushing the detection frame to slide towards or away from the inside of the detection box.

2. A hydraulic component air tightness detection device according to claim 1, characterized in that: Also includes: A top support claw, wherein a plurality of the top support claws are distributed along the circumference of the center position of the top clamping plate, and the top support claw is fixedly connected to a side of the top clamping plate close to the bottom support plate; the top support claw is obliquely arranged on the top clamping plate.

3. A hydraulic component air tightness detection device according to claim 1, characterized in that: Also includes: A sealing plug is arranged on the sealing cover plate, and the sealing plug is arranged in a conical shape; a hole is arranged in the middle of the sealing plug, and the air intake pipe is arranged at the opening position of the sealing plug.

4. A hydraulic component air tightness detection device according to claim 1, characterized in that: Also includes: A clamping plate is rotatably connected to the top of the arc-shaped clamping member, and the clamping plate is arranged in an arc shape, and a plurality of evenly distributed rubber blocks are fixedly connected to the inner side wall of the clamping plate.

5. The hydraulic component air tightness detection device according to claim 1, characterized in that: The linear pushing device comprises a threaded rod rotatably connected to the inside of the detection frame, the top support plate and the threaded rod are threadedly connected, the top end of the threaded rod is fixedly connected to a driving disk, and the driving disk is fixedly connected to a pushing handle.

6. A hydraulic component air tightness detection device according to claim 1, characterized in that: Also includes: A guide structure, the guide structure comprising a vertical guide groove vertically provided on the fixing frame and an inclined guide groove obliquely provided on the fixing frame; The upper and lower ends of the detection frame are respectively fixedly connected with a top guide shaft and a bottom guide shaft, and the top guide shaft and the bottom guide shaft are respectively slidably connected inside the vertical guide groove and the inclined guide groove.

7. A hydraulic component air tightness detection device according to claim 6, characterized in that: The detection drive device comprises a pushing hydraulic cylinder fixedly connected to the fixing frame, and the extending end of the pushing hydraulic cylinder is rotatably connected to the top guide shaft.

8. The hydraulic component air tightness detection device according to claim 1, characterized in that: The top support plate is rotatably connected with a driving wheel, a belt is sleeved between the driving wheel and the top pressing plate, and a driving motor for driving the driving wheel to rotate is fixedly mounted on the top support plate.

Images