CN115326306B

CN115326306B - Cylinder barrel air tightness detection device for hydraulic cylinder manufacturing

Info

Publication number: CN115326306B
Application number: CN202211250685.6A
Authority: CN
Inventors: 杨徐辉; 黄忠
Original assignee: Jiangsu Jinrun Hydraulic Co ltd
Current assignee: Jiangsu Jinrun Hydraulic Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-01-10
Anticipated expiration: 2042-10-13
Also published as: CN115326306A

Abstract

The invention discloses a cylinder barrel air tightness detection device for hydraulic cylinder manufacturing, which relates to the field of hydraulic cylinder manufacturing and comprises a placing groove, a U-shaped plate, a detection mechanism, a positioning placing mechanism, an ejection mechanism and a classification discharging mechanism, wherein the lower inner side wall of the placing groove is obliquely arranged in a left-high-right manner, the left end of the placing groove is in a closed arrangement, the right end of the placing groove is fixedly connected with the U-shaped plate, the detection mechanism is arranged at the rear side inside the U-shaped plate, a strip-shaped opening is formed in the lower side wall of the U-shaped plate, the positioning placing mechanism is arranged in the strip-shaped opening, the ejection mechanism is arranged at the lower side of the U-shaped plate, a top plate in the ejection mechanism can be vertically and slidably arranged right below the strip-shaped opening, and the classification discharging mechanism is arranged at the right end of the U-shaped plate. The invention can continuously detect the air tightness of the plurality of cylinder barrels, does not need manual repeated dismounting and replacing for a plurality of times, improves the detection efficiency and reduces the working strength of people.

Description

Cylinder barrel air tightness detection device for hydraulic cylinder manufacturing

Technical Field

The invention belongs to the technical field of hydraulic cylinder manufacturing, and particularly relates to a cylinder barrel air tightness detection device for manufacturing a hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines, and the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston; the hydraulic cylinder basically comprises a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device, wherein the buffering device and the exhaust device are determined according to specific application occasions, and other devices are indispensable.

At present, the pneumatic cylinder is when manufacturing, need detect the gas tightness of cylinder, avoid the lateral wall of cylinder to appear the crack and influence normal use, however, among the prior art, when carrying out the gas tightness detection to the cylinder, need install the cylinder on detection device earlier, then detect again, detect the back, dismantle the cylinder again, then change other cylinders and continue to detect, need continuous installation, dismantle and change the cylinder, thereby need consume a large amount of time, influence detection efficiency, and people's the amount of labour has been increased, consequently, a pneumatic cylinder is made and is used cylinder gas tightness detection device is proposed.

Disclosure of Invention

Aiming at the situation and overcoming the defects of the prior art, the invention provides the cylinder barrel air tightness detection device for manufacturing the hydraulic cylinder, which effectively solves the problems that when the air tightness of the cylinder barrel is detected at present, the cylinder barrel needs to be installed on the detection device firstly, then the detection is carried out, the cylinder barrel is disassembled after the detection, then other cylinder barrels are replaced for continuous detection, and the cylinder barrel needs to be continuously installed, disassembled and replaced, so that a large amount of time is consumed, the detection efficiency is influenced, and the labor capacity of people is increased.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cylinder gas tightness detection device for pneumatic cylinder is made, includes standing groove, U-shaped board, detection mechanism, location placement mechanism, ejection mechanism and categorised discharge mechanism, the lower inside wall of standing groove is the slope setting of high right side from top to bottom, and the left end of standing groove sets up for sealing, the right-hand member and the U-shaped board fixed connection of standing groove, detection mechanism sets up the inside rear side at the U-shaped board, the bar mouth has been seted up to the lower lateral wall of U-shaped board, location placement mechanism sets up in the bar mouth, ejection mechanism sets up the downside at the U-shaped board, and the roof among the ejection mechanism can vertically slide the setting under the bar mouth, categorised discharge mechanism sets up the right-hand member at the U-shaped board.

Preferably, detection mechanism includes cylinder, sealing plug, gas tube and baroceptor, the cylinder is fixed to be set up in the rear side of U-shaped board, and the round hole that the expansion end of cylinder passed the rear side wall middle part of U-shaped board extend to the inside of U-shaped board and with sealing plug fixed connection, the fixed sealing plug that runs through of output of gas tube sets up in the front side middle part of sealing plug, baroceptor is also fixed to be set up in the front side of sealing plug.

Preferably, ejection mechanism includes roof, U-shaped pole and T shape pole, the roof vertically sets up at the downside of U-shaped board and is located the bar mouth under, the fixed rear side that sets up at the roof of U-shaped pole, and the U-shaped pole is preceding high back end slope setting, the one end fixed connection that the upper end of T shape pole and the removal portion of cylinder are close to the sealing plug, and the vertical portion of T shape pole pass the U-shaped pole and slide the setting with the U-shaped pole, the fixed plate that is provided with of lower extreme front side of U-shaped board, the rear side of fixed plate is provided with first elasticity canceling release mechanical system and is connected with the roof through first elasticity canceling release mechanical system, the upper end of roof is the low slope setting of high left right side.

Preferably, first elasticity canceling release mechanical system includes first slider, first slide bar and first spring, the first spout of vertical setting is opened to the rear side of fixed plate, first slider slides and sets up in first spout, the vertical fixed setting of first slide bar is in first spout, first slider passes through first slide opening and first slide bar sliding connection, first spring is fixed to be set up in the upper end of first slider and establish with first slide bar activity cover, the rear end of first slider and the front end fixed connection of roof.

Preferably, categorised discharge mechanism includes Y shape blown down tank, rotor plate, bull stick and servo motor, the input of Y shape blown down tank and the right-hand member fixed connection of U-shaped board, the vertical setting of bull stick is in the inside branching department of Y shape blown down tank, and the lower extreme of bull stick passes the lower lateral wall of Y shape blown down tank through first bearing and rotates with the lower lateral wall of Y shape blown down tank to be connected, servo motor is fixed to be set up in the bottom of Y shape blown down tank, and servo motor's output passes through the lower extreme fixed connection of shaft coupling bull stick, the rotor plate sets up in the inside of Y shape blown down tank, and one side of rotor plate and the pole wall fixed connection of bull stick.

Preferably, the positioning and placing mechanism comprises two positioning rollers, the two positioning rollers are longitudinally arranged in the strip-shaped opening, a gap exists between the two positioning rollers, the two ends of the positioning rollers are fixedly connected with the front side and the rear side of the strip-shaped opening respectively, and the top plate can penetrate through the two positioning rollers.

Preferably, the inside right side of U-shaped board still is provided with stop gear, stop gear includes the baffle, promotes piece and three hornblocks, the baffle vertically sets up in the inside of U-shaped board and is located the right side of sealing plug, three hornblocks are fixed to be set up in the left side of baffle, and three hornblocks's downside is the slope setting, promote the piece and pass through the rotatable setting of spring hinge and be close to the removal of sealing plug in the movable part of cylinder, and the right-hand member that promotes the piece extends to three hornblocks's downside and slides the setting with three hornblocks, two inside walls are provided with second elasticity canceling release mechanical system around the U-shaped board.

Preferably, the second elastic reset mechanism comprises two second sliding blocks, two second sliding rods and two second springs, second sliding grooves aligned with the baffle are formed in the two inner side walls of the U-shaped plate, the two second sliding blocks are arranged in the two second sliding grooves in a sliding mode respectively, the two second sliding rods are vertically and fixedly arranged in the two second sliding grooves, the two second sliding blocks are respectively connected with the two second sliding rods in a sliding mode through second sliding holes, the two second springs are respectively fixedly arranged at the upper ends of the two second sliding blocks and are respectively sleeved with the two second sliding rods in a movable mode, and the two opposite ends of the second sliding blocks are respectively fixedly connected with the front end and the rear end of the baffle.

Preferably, the horizontal inclination angle of the lower inner side wall of the placing groove is 10 degrees, and supporting legs are fixedly arranged at four corners of the bottom of the placing groove.

Preferably, two ends of the lower side wall of the T-shaped rod are rotatably sleeved with rollers through second bearings, and the two rollers are in rolling connection with the lower side wall of the U-shaped rod.

The invention has the technical effects and advantages that:

1. place a plurality of cylinders that wait to detect in the standing groove in proper order, because the lower inside wall of cylinder is the slope setting of high left right side, thereby the inside cylinder of standing groove can roll right, when the cylinder roll of rightmost side falls between two registration rollers top, start the cylinder and drive the sealing plug and move forward, the opening part of cylinder is sealed to the sealing plug, and go out into the cylinder with the inflation end of gas tube, aerify the inside of cylinder through the gas tube, after aerifing certain atmospheric pressure, stop aerifing, rethread pneumatic pressure sensor detects the atmospheric pressure inside the cylinder, if atmospheric pressure reduces, then the gas tightness of cylinder is unqualified, if atmospheric pressure does not change, then the gas tightness of cylinder is qualified, after finishing the detection, drive the sealing plug backward movement and make the sealing plug separate with the gas tightness that detects through the cylinder, the cylinder drives the T shape pole and moves to the rear side simultaneously, the backward movement of T shape pole can drive the U shape pole rebound, the U shape pole drives the roof rebound, the roof can upwards jack up and promote the cylinder that detects and push right, make the removal to the Y shape blown down in the discharge chute, then, people can not carry out the manual work of cylinder and reduce the roll and detect the intensity more times of cylinder, thereby the detection efficiency is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along the line A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic cross-sectional view of the square B-B of FIG. 2 according to the present invention;

FIG. 5 is a schematic top view of the Y-shaped discharge chute of the present invention;

FIG. 6 is a schematic top view of the baffle of the present invention;

FIG. 7 is a schematic view of the left side of the baffle of the present invention;

FIG. 8 is a bottom view of the U-shaped bar of the present invention.

In the figure: 1. a placement groove; 2. a U-shaped plate; 3. a top plate; 4. a cylinder; 5. a sealing plug; 6. an inflation tube; 7. an air pressure sensor; 8. a U-shaped rod; 9. a T-shaped rod; 10. a fixing plate; 11. a first slider; 12. a first slide bar; 13. a first spring; 14. a Y-shaped discharge chute; 15. a rotating plate; 16. a rotating rod; 17. a servo motor; 18. a positioning roller; 19. a baffle plate; 20. a pushing block; 21. a triangular block; 22. a second slider; 23. a second slide bar; 24. a second spring; 25. supporting legs; 26. and (3) a roller.

Detailed Description

The invention provides a cylinder barrel airtightness detection device for manufacturing a hydraulic cylinder, which comprises a placing groove 1, a U-shaped plate 2, a detection mechanism, a positioning placing mechanism, an ejection mechanism and a classification discharging mechanism, wherein the lower inner side wall of the placing groove 1 is obliquely arranged in a left-high-right manner, the left end of the placing groove 1 is arranged in a closed manner, the right end of the placing groove 1 is fixedly connected with the U-shaped plate 2, the detection mechanism is arranged at the rear side of the inside of the U-shaped plate 2, a strip-shaped opening is formed in the lower side wall of the U-shaped plate 2, the positioning placing mechanism is arranged in the strip-shaped opening, the ejection mechanism is arranged at the lower side of the U-shaped plate 2, a top plate 3 in the ejection mechanism can be vertically arranged under the strip-shaped opening in a sliding manner, and the classification discharging mechanism is arranged at the right end of the U-shaped plate 2.

As shown in fig. 2 and 3, detection mechanism includes cylinder 4, sealing plug 5, gas tube 6 and baroceptor 7, cylinder 4 is fixed to be set up in the rear side of U-shaped plate 2, and the movable end of cylinder 4 passes the round hole at the rear wall middle part of U-shaped plate 2 and extends to the inside of U-shaped plate 2 and with sealing plug 5 fixed connection, the output end of gas tube 6 is fixed to be run through sealing plug 5 and set up at the front side middle part of sealing plug 5, baroceptor 7 is also fixed to be set up in the front side of sealing plug 5, when the opening part shutoff of the cylinder that will await measuring of sealing plug 5, can aerify to the cylinder inside through gas tube 6, aerify the back, can detect baroceptor 7's inside atmospheric pressure through baroceptor 7, thereby detect the leakproofness of cylinder.

As shown in fig. 2-4, the ejection mechanism includes a top plate 3, a U-shaped rod 8 and a T-shaped rod 9, the top plate 3 is vertically disposed under the U-shaped plate 2 and located under the bar-shaped opening, the U-shaped rod 8 is fixedly disposed at the rear side of the top plate 3, the U-shaped rod 8 is disposed in an inclined manner with a front high end and a rear high end, the upper end of the T-shaped rod 9 is fixedly connected with one end of the moving portion of the cylinder 4 close to the sealing plug 5, the vertical portion of the T-shaped rod 9 passes through the U-shaped rod 8 and is slidably disposed with the U-shaped rod 8, a fixing plate 10 is fixedly disposed at the front side of the lower end of the U-shaped plate 2, a first elastic reset mechanism is disposed at the rear side of the fixing plate 10 and is connected with the top plate 3 through the first elastic reset mechanism, and the upper end of the top plate 3 is disposed in an inclined manner with a left high end and a right low end.

Meanwhile, the first elastic reset mechanism comprises a first sliding block 11, a first sliding rod 12 and a first spring 13, a first sliding groove which is vertically arranged is formed in the rear side of the fixing plate 10, the first sliding block 11 is arranged in the first sliding groove in a sliding mode, the first sliding rod 12 is vertically and fixedly arranged in the first sliding groove, the first sliding block 11 is connected with the first sliding rod 12 in a sliding mode through a first sliding hole, the first spring 13 is fixedly arranged at the upper end of the first sliding block 11 and movably sleeved with the first sliding rod 12, the rear end of the first sliding block 11 is fixedly connected with the front end of the top plate 3, when the moving end of the air cylinder 4 moves towards the front side, the T-shaped rod 9 can be driven to move towards the front side, elastic force can be applied to the first sliding block 11 through the first spring 13, and therefore the first sliding block 11 drives the top plate 3 to move downwards to reset, and the cylinder barrel can move to the strip-shaped opening conveniently.

As shown in fig. 2 and 5, the sorting discharging mechanism includes a Y-shaped discharging chute 14, a rotating plate 15, a rotating rod 16 and a servo motor 17, an input end of the Y-shaped discharging chute 14 is fixedly connected with a right end of the U-shaped plate 2, the rotating rod 16 is vertically arranged at a branch inside the Y-shaped discharging chute 14, a lower end of the rotating rod 16 passes through a lower side wall of the Y-shaped discharging chute 14 through a first bearing and is rotatably connected with a lower side wall of the Y-shaped discharging chute 14, the servo motor 17 is fixedly arranged at a bottom of the Y-shaped discharging chute 14, an output end of the servo motor 17 is fixedly connected with a lower end of the rotating rod 16 through a coupling, the rotating plate 15 is arranged inside the Y-shaped discharging chute 14, one side of the rotating plate 15 is fixedly connected with a rod wall of the rotating rod 16, when the cylinder airtightness detected by the air pressure sensor 7 is unqualified, the servo motor 17 drives the rotating plate 15 to rotate to one side through the rotating rod 16, so that the unqualified cylinder is discharged from one discharge port of the Y-shaped discharging chute 14, and the qualified cylinder is conveniently discharged from the other discharge port.

As shown in fig. 2, the positioning and placing mechanism comprises two positioning rollers 18, the two positioning rollers 18 are longitudinally arranged in the strip-shaped opening, a gap exists between the two positioning rollers 18, the front end and the rear end of each positioning roller 18 are fixedly connected with the front side and the rear side of the strip-shaped opening respectively, the top plate 3 can penetrate through the two positioning rollers 18, and when the cylinder barrel rolls to the U-shaped plate 2, the cylinder barrel can stay above the two positioning rollers 18, so that the rolling position of the cylinder barrel can be positioned, and the cylinder barrel can be aligned to the sealing plug 5 conveniently.

Fig. 2, fig. 4, fig. 6 and fig. 7 show, the inside right side of U-shaped plate 2 still is provided with stop mechanism, stop mechanism includes baffle 19, promote piece 20 and triangle piece 21, baffle 19 vertically sets up in the inside of U-shaped plate 2 and is located the right side of sealing plug 5, triangle piece 21 is fixed to be set up in the left side of baffle 19, and triangle piece 21's downside is the slope setting, it is close to the removal of sealing plug 5 to promote piece 20 through the rotatable setting of spring hinge in the movable part of cylinder 4, and the right-hand member that promotes piece 20 extends to triangle piece 21's downside and sets up with triangle piece 21 slip, two inside walls in front and back of U-shaped plate 2 are provided with second elasticity canceling release mechanical system.

Meanwhile, the second elastic reset mechanism comprises two second sliders 22, two second sliding rods 23 and two second springs 24, two second sliding chutes aligned with the baffle 19 are formed in the front inner side wall and the rear inner side wall of the U-shaped plate 2, the two second sliders 22 are slidably arranged in the two second sliding chutes respectively, the two second sliding rods 23 are vertically and fixedly arranged in the two second sliding chutes, the two second sliders 22 are slidably connected with the two second sliding rods 23 through second sliding holes respectively, the two second springs 24 are fixedly arranged at the upper ends of the two second sliders 22 respectively and movably sleeved with the two second sliding rods 23 respectively, and two opposite ends of the two second sliders 22 are fixedly connected with the front end and the rear end of the baffle 19 respectively.

When the air cylinder 4 drives the sealing plug 5 to move backwards, the pushing block 20 is driven to slide on the lower side of the triangular block 21, the pushing block 20 can drive the triangular block 21 to move upwards, the triangular block 21 drives the baffle plate 19 to move upwards, the detected cylinder barrel can be conveniently moved out of the U-shaped plate 2, the air cylinder 4 drives the pushing block 20 to move, the pushing block 20 is separated from the triangular block 21, two second springs 24 are used for applying elasticity to the two second sliding blocks 22 respectively, the two second sliding blocks 22 drive the baffle plate 19 to move downwards, the situation that the subsequent rolling cylinder barrel directly moves into the Y-shaped discharge chute 14 is avoided, when the air cylinder 4 drives the pushing block 20 to move forwards, the pushing block 20 can be extruded and then is rotationally attached to a moving portion of the air cylinder 4 when contacting with the triangular block 21, and when the pushing block 20 moves to the front side of the triangular block 21, the pushing block can be rotationally reset under the action of the spring hinge.

As shown in fig. 2, the horizontal inclination angle of the lower inner side wall of the placing groove 1 is 10 degrees, so that the cylinder barrel can roll rightwards conveniently, and supporting legs 25 are fixedly arranged at four corners of the bottom of the placing groove 1, so that the device can be stably supported conveniently.

As shown in fig. 8, rollers 26 are rotatably sleeved on both ends of the lower side wall of the T-shaped rod 9 through second bearings, and both rollers 26 are in rolling connection with the lower side wall of the U-shaped rod 8, so that the friction force between the T-shaped rod 9 and the U-shaped rod 8 can be reduced.

The working principle of the invention is as follows: place a plurality of cylinders that wait to detect in proper order in standing groove 1, because the lower inside wall of cylinder is the slope setting of high right side from left to right, thereby the inside cylinder of standing groove 1 can roll right, roll down when the cylinder on the rightmost side between two registration rollers 18 when the top, start cylinder 4 and drive sealing plug 5 and move forward, sealing plug 5 seals the opening part of cylinder, and with the inflation end discrepancy cylinder of gas tube 6, inflate the inside of cylinder through gas tube 6, after aerifing certain atmospheric pressure, stop to aerify, rethread air pressure sensor 7 detects the inside atmospheric pressure of cylinder, if atmospheric pressure reduces, then the gas tightness of cylinder is unqualified, if atmospheric pressure does not change, then the gas tightness of cylinder, after the detection finishes, drive 5 through cylinder 4 and remove backward and make 5 and the sealing plug separation that detects the cylinder, cylinder 4 drives T shape pole 9 and moves backward, T shape pole 9 can drive U shape pole 8 and move upward, U shape pole 8 drives roof 3 and move upward, roof 3 can push up and promote the detection and push right side, make the removal of T shape pole 9 move backward, thereby the efficiency of the manual work of roll down to the cylinder can be reduced and carry out the efficiency of the detection of the manual work of 18, thereby the efficiency of the reduction of the time of the cylinder is carried out the detection, it can carry out the detection to carry out the repeated detection of the roll down to the side, and carry out the detection in the manual work of the cylinder, thereby the efficiency of the cylinder.

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

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 alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pneumatic cylinder is made with cylinder gas tightness detection device which characterized in that: comprises a placing groove (1), a U-shaped plate (2), a detection mechanism, a positioning placement mechanism, an ejection mechanism and a classification discharging mechanism, wherein the lower inner side wall of the placing groove (1) is obliquely arranged in a left-high-right direction, the left end of the placing groove (1) is arranged in a closed manner, the right end of the placing groove (1) is fixedly connected with the U-shaped plate (2), the detection mechanism is arranged at the rear side of the interior of the U-shaped plate (2), a strip-shaped opening is formed in the lower side wall of the U-shaped plate (2), the positioning placement mechanism is arranged in the strip-shaped opening, the ejection mechanism is arranged at the lower side of the U-shaped plate (2), a top plate (3) in the ejection mechanism can be vertically and slidably arranged under the strip-shaped opening, and the classification discharging mechanism is arranged at the right end of the U-shaped plate (2),

the detection mechanism comprises a cylinder (4), a sealing plug (5), an inflation tube (6) and an air pressure sensor (7), wherein the cylinder (4) is fixedly arranged at the rear side of the U-shaped plate (2), the movable end of the cylinder (4) penetrates through a round hole in the middle of the rear side wall of the U-shaped plate (2) to extend into the U-shaped plate (2) and is fixedly connected with the sealing plug (5), the output end of the inflation tube (6) is fixedly penetrated through the sealing plug (5) and is arranged in the middle of the front side of the sealing plug (5), the air pressure sensor (7) is also fixedly arranged at the front side of the sealing plug (5),

the ejection mechanism comprises a top plate (3), a U-shaped rod (8) and a T-shaped rod (9), the top plate (3) is longitudinally arranged on the lower side of the U-shaped plate (2) and is positioned under the strip-shaped opening, the U-shaped rod (8) is fixedly arranged on the rear side of the top plate (3), the U-shaped rod (8) is obliquely arranged with a high front end and a high rear end, the upper end of the T-shaped rod (9) is fixedly connected with one end, close to the sealing plug (5), of the moving part of the cylinder (4), the vertical part of the T-shaped rod (9) penetrates through the U-shaped rod (8) and is slidably arranged with the U-shaped rod (8), a fixing plate (10) is fixedly arranged on the front side of the lower end of the U-shaped plate (2), a first elastic reset mechanism is arranged on the rear side of the fixing plate (10) and is connected with the top plate (3) through the first elastic reset mechanism, and the upper end of the top plate (3) is obliquely arranged with a high left side and a low right side,

the first elastic reset mechanism comprises a first sliding block (11), a first sliding rod (12) and a first spring (13), a first sliding groove which is vertically arranged is formed in the rear side of the fixing plate (10), the first sliding block (11) is arranged in the first sliding groove in a sliding mode, the first sliding rod (12) is vertically and fixedly arranged in the first sliding groove, the first sliding block (11) is connected with the first sliding rod (12) in a sliding mode through a first sliding hole, the first spring (13) is fixedly arranged at the upper end of the first sliding block (11) and movably sleeved with the first sliding rod (12), the rear end of the first sliding block (11) is fixedly connected with the front end of the top plate (3),

the classified discharging mechanism comprises a Y-shaped discharging groove (14), a rotating plate (15), a rotating rod (16) and a servo motor (17), the input end of the Y-shaped discharging groove (14) is fixedly connected with the right end of a U-shaped plate (2), the rotating rod (16) is vertically arranged at the inner branched part of the Y-shaped discharging groove (14), the lower end of the rotating rod (16) penetrates through the lower side wall of the Y-shaped discharging groove (14) through a first bearing and is rotatably connected with the lower side wall of the Y-shaped discharging groove (14), the servo motor (17) is fixedly arranged at the bottom of the Y-shaped discharging groove (14), the output end of the servo motor (17) is fixedly connected with the lower end of the shaft coupling rotating rod (16), the rotating plate (15) is arranged in the Y-shaped discharging groove (14), and one side of the rotating plate (15) is fixedly connected with the rod wall of the rotating rod (16),

the inside right side of U-shaped board (2) still is provided with stop gear, stop gear includes baffle (19), promotes piece (20) and three hornblocks (21), baffle (19) vertically set up in the inside of U-shaped board (2) and are located the right side of sealing plug (5), three fixed settings in the left side of baffle (19) in angle (21), and the downside of three hornblocks (21) is the slope setting, promote piece (20) and be close to the removal of sealing plug (5) through the rotatable setting of spring hinge in the movable portion of cylinder (4), and the right-hand member that promotes piece (20) extends to the downside of three hornblocks (21) and slides the setting with three hornblocks (21), two inside walls around U-shaped board (2) are provided with second elasticity canceling release mechanical system.

2. The cylinder tube airtightness detection apparatus for hydraulic cylinder manufacturing according to claim 1, characterized in that: the positioning placement mechanism comprises two positioning rollers (18), the two positioning rollers (18) are all longitudinally arranged in the strip-shaped opening, a gap exists between the two positioning rollers (18), the two ends of the positioning rollers (18) are fixedly connected with the front side and the rear side of the strip-shaped opening respectively, and the top plate (3) can penetrate through the two positioning rollers (18).

3. The cylinder tube airtightness detection device for manufacturing the hydraulic cylinder according to claim 2, wherein the second elastic reset mechanism includes two second sliding blocks (22), two second sliding rods (23) and two second springs (24), two inner side walls of the U-shaped plate (2) are respectively provided with second sliding grooves aligned with the baffle (19), the two second sliding blocks (22) are respectively slidably disposed in the two second sliding grooves, the two second sliding rods (23) are vertically and fixedly disposed in the two second sliding grooves, the two second sliding blocks (22) are respectively slidably connected with the two second sliding rods (23) through second sliding holes, the two second springs (24) are respectively fixedly disposed at upper ends of the two second sliding blocks (22) and respectively movably sleeved with the two second sliding rods (23), and opposite ends of the two second sliding blocks (22) are respectively fixedly connected with front and rear ends of the baffle (19).

4. The cylinder tube airtightness detection apparatus for hydraulic cylinder manufacturing according to claim 3, wherein: the horizontal inclination angle of the lower inner side wall of the placing groove (1) is 10 degrees, and supporting legs (25) are fixedly arranged at four corners of the bottom of the placing groove (1).

5. The cylinder tube airtightness detection apparatus for hydraulic cylinder manufacturing according to claim 4, wherein: and two ends of the lower side rod wall of the T-shaped rod (9) are rotatably sleeved with rollers (26) through second bearings, and the two rollers (26) are in rolling connection with the lower side wall of the U-shaped rod (8).