CN116399518A - Sealing performance detection device for pneumatic actuator - Google Patents
Sealing performance detection device for pneumatic actuator Download PDFInfo
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- CN116399518A CN116399518A CN202310664538.1A CN202310664538A CN116399518A CN 116399518 A CN116399518 A CN 116399518A CN 202310664538 A CN202310664538 A CN 202310664538A CN 116399518 A CN116399518 A CN 116399518A
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- 238000001514 detection method Methods 0.000 title claims abstract description 65
- 238000007789 sealing Methods 0.000 title claims description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/10—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for containers, e.g. radiators
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention is applicable to the field of airtight detection, and provides a device for detecting tightness of a pneumatic actuator, which is used for detecting the airtight of the pneumatic actuator to be detected; comprising the following steps: the clamping mechanism is fixedly supported and arranged on the detection platform; the air supply mechanism comprises an air source cylinder; the air source cylinder is respectively communicated with an air inlet pipe and a first pipeline, and the other end of the first pipeline is connected with an A nozzle on the cylinder body to be tested; and one end of the second pipeline is connected with the B nozzle on the cylinder body to be tested, and the other end of the second pipeline extends into the observation water tank. In the implementation process of the pneumatic actuator tightness detection device provided by the invention, the air source piston moves in the air source cylinder through the movement of the lifting rack so as to continuously supply air to the cylinder to be detected, and the piston to be detected can generate intermittent displacement in the cylinder to be detected due to the movement of the lifting rack so as to continuously seal the piston to be detected at different positions in the cylinder to be detected.
Description
Technical Field
The invention belongs to the field of airtight detection, and particularly relates to a tightness detection device for a pneumatic actuator.
Background
The pneumatic actuator has the advantages of easy realization of reciprocating linear motion, high motion speed, easy control of the speed, simple use and maintenance, low cost and the like; therefore, there is a strict requirement on the air tightness of the pneumatic actuator, and if the air tightness is not good, the service performance thereof is affected.
Through retrieving, for example, the patent document with publication number CN 218349725U discloses a cylinder air tightness detection device, the detection device is used for placing a cylinder into a detection cylinder, and pressing the detection cylinder by driving a movable plate to descend, so that after the cylinder is plugged by a sealing plate, the detection cylinder is injected with water by matching with an external water pipe, an external air pump is used for injecting air into an air inlet electromagnetic valve, and when the air leakage of the detection cylinder is detected, the phenomenon of water bubbles occurs, so that a pneumatic actuator product with insufficient tightness is judged.
In the detection device and the implementation mode thereof provided by the scheme, the air tightness of the contact position between the inner wall of the cavity of the pneumatic actuator and the moving piston cannot be detected, the air tightness of the cylinder body of the pneumatic actuator is detected, when the self air tightness of the cylinder body of the pneumatic actuator meets the requirement, the sealing effect between the piston and the inner cavity wall of the cylinder body cannot be ensured, and because the piston is required to move in the cylinder body during the action of the pneumatic actuator, the air tightness detection device of the cylinder is required to be improved.
Disclosure of Invention
The embodiment of the invention aims to provide a pneumatic actuator tightness detection device which aims to solve the technical problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions.
The device for detecting the tightness of the pneumatic actuator is used for detecting the tightness of the pneumatic actuator to be detected, the pneumatic actuator to be detected comprises a cylinder body to be detected and a piston to be detected, which is arranged in the cylinder body to be detected in a sliding sealing manner, and a piston rod is fixedly arranged on the piston to be detected;
the pneumatic actuator tightness detection device comprises:
the clamping mechanism is fixedly arranged on the detection platform in a supporting manner and used for fixing the pneumatic actuator to be detected, the clamping mechanism comprises a mounting platform and a moving platform, one end of the moving platform is fixedly provided with a movable plate, and the movable plate is fixedly connected with the end part of the piston rod;
the air supply mechanism comprises an air supply cylinder, the air supply cylinder is fixed on the detection platform, an air supply piston is arranged in the air supply cylinder, and the air supply mechanism further comprises a feeding assembly, wherein the feeding assembly is used for pushing the air supply piston to move in the air supply cylinder; the air source cylinder is respectively provided with an air inlet pipe and a first pipeline in a communicated mode; the other end of the first pipeline is connected with an A nozzle on the cylinder body to be tested;
and one end of the second pipeline is connected with the B nozzle on the cylinder body to be detected, the other end of the second pipeline extends into an observation water tank, and the observation water tank is arranged on the detection platform.
Further, a first one-way valve is arranged on the first pipeline and is used for enabling gas in the gas source cylinder to enter the first pipeline in a one-way mode;
the air inlet pipe is provided with a second one-way valve, and the second one-way valve is used for enabling air in the air inlet pipe to enter the air source cylinder in a one-way mode.
Further, when the feeding assembly acts, the moving platform is pushed to move along the extending direction of the piston rod relative to the cylinder body to be tested;
the feeding assembly comprises a lifting rack, the top end of the lifting rack is fixedly connected with a lifting block, the lifting block is arranged on a height-adjusting screw rod in a threaded connection mode, the rotation of the height-adjusting screw rod is driven by a forward and reverse rotation servo motor, the top end of the height-adjusting screw rod is rotationally connected with a limiting top block, and the limiting top block is used for limiting the top end of a stroke of the lifting block moving along the height-adjusting screw rod;
the bottom of the lifting rack penetrates through and extends into the air source cylinder, the bottom of the lifting rack is fixedly connected with the air source piston, the lifting screw rod is driven to rotate by the forward-reverse servo motor, the height position of the lifting block along the lifting screw rod is adjusted according to the rotation direction of the lifting screw rod, the height of the lifting rack in the vertical direction is adjusted, and therefore the air source piston is pushed to move in the air source cylinder in the first direction or the second direction.
Further, a push-pull assembly for pushing the moving platform to move along the extending direction of the piston rod relative to the cylinder body to be tested is arranged on the detection platform, and the push-pull assembly is in linkage with the lifting rack.
Further, the push-pull assembly comprises a push-pull fluted disc, the push-pull fluted disc is rotatably supported on the detection platform, and a guide post is fixedly arranged on one side of the push-pull fluted disc; the push-pull assembly further comprises a push-pull frame, a push-pull cavity matched with the guide column is formed in the push-pull frame, the guide column supports and slides against the push-pull cavity, and when the push-pull fluted disc rotates, the guide column is driven to conduct circular motion so as to push the push-pull frame to move.
Further, a first positioning piece is arranged at the top end of the push-pull frame, a plurality of second positioning grooves are formed in the lower surface of the mobile platform at equal intervals, and the second positioning grooves are matched with the first positioning piece; the end part of the mobile platform is provided with a second locating piece, and a plurality of first locating grooves matched with the second locating piece are formed in the detection platform at equal intervals.
Further, the first positioning piece comprises a first supporting sliding block, the first supporting sliding block is supported and slidably arranged in a supporting cavity through a first connecting spring, and the supporting cavity is arranged at the top of the push-pull frame; the first locating piece further comprises a first locating block, the first locating block is fixedly connected with the first supporting sliding block, a first inclined surface is arranged on the first locating block, and the first inclined surface faces in the same direction with the direction of retracting action of the piston rod relative to the cylinder body to be detected.
Further, the second locating piece comprises a support, the support is fixedly installed on the mobile platform, a second supporting sliding block is arranged in an inner cavity of the support in a supporting and sliding mode through a second connecting spring, a second locating block is fixedly installed on the second supporting sliding block, a second inclined face is formed in the second locating block, and the direction of the second inclined face is opposite to that of the first inclined face.
Further, the detection platform is further provided with a linkage gear in a supporting and rotating manner, the linkage gear is meshed with the lifting rack, and the linkage gear is in transmission connection with the push-pull fluted disc through a sprocket mode, so that the push-pull fluted disc is synchronously driven to rotate when the lifting rack moves, and the push-pull frame is pushed to perform periodic reciprocating movement.
Furthermore, the first pipeline is also connected with a pressure release component, and the pressure release component is used for releasing pressure after the air pressure in the first pipeline reaches a threshold value so as to avoid that the lifting rack cannot perform displacement action due to overhigh air pressure in the cylinder body to be tested;
the pressure release component comprises a box body fixedly arranged on the detection platform, a first piston and a second piston are arranged in the box body in a supporting, sealing and sliding manner, the first piston and the second piston are connected through a supporting spring, an inner cavity at one end of the box body is communicated with the first pipeline through a connecting pipeline, an operation screw rod used for adjusting the position of the second piston in the box body is arranged at the other end of the box body, the pressure release component is rotatably arranged at the other end of the box body in a penetrating manner in a threaded connection manner, the end part of the operation screw rod is rotatably connected with the second piston, and the operation screw rod can be manually rotated so as to enable the operation screw rod to generate displacement relative to the box body, and further adjust the position of the second piston in the box body;
the middle section of the box body is also provided with an air hole; and positioning ribs are fixedly arranged in the box body and positioned on the inner wall of the box body between the air holes and the second piston.
Compared with the prior art, in the implementation process of the pneumatic actuator tightness detection device, the air source piston moves in the air source cylinder through the movement of the lifting rack so as to continuously supply air into the cylinder to be detected, and the piston to be detected also generates intermittent displacement in the cylinder to be detected due to the movement of the lifting rack so as to continuously realize tightness of the piston to be detected under the condition of different positions in the cylinder to be detected;
when the air supply mechanism injects air into one end of the cylinder to be detected, the air pressure in one end of the cylinder to be detected is increased, and when a gap exists between the piston to be detected and the inner wall of the cylinder to be detected and the air tightness is poor, the air in one end of the cylinder to be detected enters the other end through the gap and is discharged from the second pipeline, at the moment, air bubbles are generated in water at the end part of the second pipeline in the observation water tank, so that the tightness between the piston to be detected and the inner wall of the cylinder to be detected is detected based on the process, and the detection result is judged by observing whether the air bubbles are generated in the water in the observation water tank.
Drawings
FIG. 1 is a perspective view of a pneumatic actuator tightness detection device of the present invention at a first view angle;
FIG. 2 is a front view of a pneumatic actuator tightness detection device of the present invention;
FIG. 3 is a perspective view of a pneumatic actuator tightness detection device according to the present invention at a second view angle;
FIG. 4 is a schematic view of a clamping mechanism in a pneumatic actuator tightness detection device according to the present invention;
FIG. 5 is a schematic diagram showing the cooperation of a movable platform and a pushing assembly in a pneumatic actuator tightness detection device according to the present invention;
FIG. 6 is a schematic diagram of a second positioning member of a pneumatic actuator tightness detection device according to the present invention;
FIG. 7 is a schematic diagram of a pushing assembly of a pneumatic actuator tightness detection device according to the present invention;
FIG. 8 is a schematic diagram of a pressure relief feature of a pneumatic actuator leak testing apparatus according to the present invention.
In fig. 1-8:
100. a detection platform; 101. height-adjusting screw rods; 102. a support channel; 103. a forward and reverse rotation servo motor; 104. a limiting top block; 105. a support rail; 106. a first positioning groove; 107. a lifting block;
200. an air source cylinder; 201. an air source piston; 202. a first pipeline; 203. lifting the rack; 204. a first one-way valve; 205. an air inlet pipe; 206. a second one-way valve;
300. clamping mechanism; 301. a mounting platform; 302. a first fixing plate; 303. a second fixing plate; 304. a placement groove; 305. a hydraulic cylinder; 306. clamping blocks; 307. a movable plate; 308. a mounting sleeve; 309. a second positioning groove; 310. a mobile platform;
400. the pneumatic actuator to be tested; 401. a cylinder to be measured; 402. a piston to be tested; 403. a piston rod;
500. observing the water tank; 501. a second pipeline;
600. a pressure release member; 601. a case; 602. a first piston; 603. a second piston; 604. a support spring; 605. positioning the ribs; 606. operating a screw rod; 607. a connecting pipeline; 608. air holes;
700. a push-pull assembly; 701. push-pull fluted disc; 702. a guide post; 703. a push-pull frame; 704. a push-pull cavity; 705. a support cavity; 706. a first support slider; 707. a first connecting spring; 708. a first positioning block; 7081. a first inclined surface; 709. a linkage gear;
800. a second positioning member; 801. a support; 802. a second support slider; 803. a second positioning block; 8031. a second inclined surface; 804. and a second connecting spring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1 and fig. 4, in an embodiment of the present invention, a device for detecting tightness of a pneumatic actuator 400 to be tested is used for detecting tightness of the pneumatic actuator 400 to be tested, specifically, the pneumatic actuator 400 to be tested includes a cylinder 401 to be tested and a piston 402 to be tested that is slidably sealed and disposed in the cylinder 401 to be tested, a piston rod 403 is fixedly mounted on the piston 402 to be tested, and an end portion of the piston rod 403 extends to the outside of the cylinder 401 to be tested after penetrating through one end of the cylinder 401 to be tested in a sealing manner.
Further, the cylinder 401 to be tested is further provided with an a nozzle and a B nozzle, the a nozzle and the B nozzle are respectively arranged at two sides of the piston 402 to be tested, when the air source injects air into the cylinder 401 to be tested through the a nozzle, the piston 402 to be tested is pushed to move to one side of the B nozzle, otherwise, when the air source injects air into the cylinder 401 to be tested through the B nozzle, the piston 402 to be tested is pushed to move to one side of the a nozzle, so that the action of the pneumatic actuator 400 to be tested is realized, the movement of the piston 402 to be tested in the cylinder 401 to be tested realizes the telescopic movement of the piston rod 403 relative to the cylinder 401 to be tested, and the process is a working principle known by the pneumatic actuator 400 to be tested.
The tightness detection device provided by the invention is used for detecting tightness between the piston 402 to be detected and the inner wall of the cylinder 401 to be detected.
In order to realize the detection of the tightness between the piston 402 to be tested and the inner wall of the cylinder 401 to be tested, as shown in fig. 1 to 3, in the embodiment of the present invention, the tightness detection device for the pneumatic actuator includes:
the clamping mechanism 300 is fixedly supported on the detection platform 100, the clamping mechanism 300 is used for fixing the pneumatic actuator 400 to be detected, the clamping mechanism 300 comprises a mounting platform 301 and a moving platform 310, one end of the moving platform 310 is fixedly provided with a movable plate 307, and the movable plate 307 is fixedly connected with the end of a piston rod 403; a placing groove 304 is formed in the mounting platform 301, and a cylinder 401 to be tested is placed in the placing groove 304; the first fixed plate 302 is fixedly arranged at one end of the mounting platform 301, the second fixed plate 303 is fixedly arranged at the other end of the mounting platform 301, the hydraulic cylinder 305 is arranged on the second fixed plate 303, the telescopic end of the hydraulic cylinder 305 is provided with the clamping block 306, and the clamping block 306 is pushed to be pressed on the cylinder 401 to be tested by utilizing the telescopic function of the hydraulic cylinder 305 so as to press and fix the cylinder 401 to be tested.
Preferably, as shown in fig. 4 and 5, in the embodiment of the present invention, a mounting sleeve 308 is fixedly welded on the movable plate 307, the mounting sleeve 308 is matched with the end of the piston rod 403, and when the end of the piston rod 403 extends into the mounting sleeve 308, the mounting sleeve is fixed by screwing a screw.
Further, as shown in fig. 1 to 4, in an embodiment of the present invention, the pneumatic actuator tightness detection device further includes:
the air supply mechanism comprises an air supply cylinder 200, wherein the air supply cylinder 200 is fixed on the detection platform 100, an air supply piston 201 is arranged in the air supply cylinder 200, and the air supply mechanism further comprises a feeding assembly, and the feeding assembly is used for pushing the air supply piston 201 to move in the air supply cylinder 200; the air source cylinder 200 is respectively provided with an air inlet pipe 205 and a first pipeline 202 in a communicating way, wherein:
a first check valve 204 is disposed on the first pipeline 202, and the first check valve 204 is used for enabling the gas in the gas source cylinder 200 to enter the first pipeline 202 in a unidirectional manner;
a second one-way valve 206 is arranged on the air inlet pipe 205, and the second one-way valve 206 is used for enabling the air in the air inlet pipe 205 to enter the air source cylinder 200 in a one-way;
thus, it will be appreciated that as the feed assembly pushes the gas source piston 201 in the first direction within the gas source cylinder 200, the gas source piston 201 compresses the gas within the gas source cylinder 200 such that the gas within the gas source cylinder 200 is unidirectional into the first conduit 202 through the first one-way valve 204; when the feeding motion air source piston 201 moves towards the second direction in the air source cylinder 200, air in the first pipeline 202 cannot flow back into the air source cylinder 200, at the moment, external air enters the air source cylinder 200 through the air inlet pipe 205 to supplement the air in the air source cylinder 200, wherein the first direction and the second direction are opposite, and when the air source cylinder 200 is placed in the vertical direction, the first pipeline 202 and the air inlet pipe 205 are communicated and arranged at the bottom of the air source cylinder 200, the air source piston 201 moves downwards in the air source cylinder 200 to be in the first direction, and the air source piston 201 moves upwards in the air source cylinder 200 to be in the second direction.
Further, in the embodiment of the present invention, the other end of the first pipeline 202 is connected to the nozzle a on the cylinder 401 to be tested, and the gas supply mechanism is utilized to inject the gas into the cylinder 401 to be tested through the first pipeline 202.
With continued reference to fig. 1-4, in an embodiment of the present invention, the pneumatic actuator tightness detection device further includes:
and one end of the second pipeline 501 is connected with a B nozzle on the cylinder 401 to be tested, the other end of the second pipeline 501 extends into the observation water tank 500, and the observation water tank 500 is arranged on the detection platform 100.
It can be understood that when the air supply mechanism injects air into one end of the cylinder 401 to be measured, the air pressure in one end of the cylinder 401 to be measured is increased, and when a gap exists between the piston 402 to be measured and the inner wall of the cylinder 401 to be measured and the tightness is poor, the air in one end of the cylinder 401 to be measured enters the other end through the gap and the second pipeline 501 is enabled to exhaust the air, at this time, air bubbles are generated in the water at the end of the second pipeline 501 in the observation water tank 500, so that the tightness between the piston 402 to be measured and the cylinder 401 to be measured is judged to be poor.
In addition, since the piston 402 to be tested moves in the cylinder 401 to be tested during the start-up and execution of the pneumatic actuator 400 to be tested, in order to fully ensure the tightness between the piston 402 to be tested and the inner wall of the cylinder 401 to be tested, it is necessary to perform tightness detection on a plurality of positions of the piston 402 to be tested in the cylinder 401 to be tested.
Accordingly, as shown in fig. 1-7, in the embodiment of the present invention, when the feeding assembly is operated, the moving platform 310 is pushed to move along the direction in which the piston rod 403 extends relative to the cylinder 401 to be tested.
Specifically, in the embodiment of the present invention, the feeding assembly includes a lifting rack 203, the top end of the lifting rack 203 is fixedly connected with a lifting block 107, the lifting block 107 is mounted on a height-adjusting screw rod 101 in a threaded connection manner, the rotation of the height-adjusting screw rod 101 is driven by a forward and reverse rotation servo motor 103, wherein the top end of the height-adjusting screw rod 101 is rotationally connected with a limiting top block 104, and the limiting top block 104 is used for limiting the top end of a stroke of the lifting block 107 moving along the height-adjusting screw rod 101.
Preferably, in the embodiment of the present invention, the bottom end of the lifting rack 203 extends into the air source cylinder 200, and the bottom end of the lifting rack 203 is fixedly connected with the air source piston 201, and the lifting screw 101 is driven to rotate by the forward and reverse servo motor 103, so as to adjust the height position of the lifting block 107 along the lifting screw 101 according to the rotation direction of the lifting screw 101, and further adjust the height of the lifting rack 203 in the vertical direction, thereby pushing the air source piston 201 to move in the air source cylinder 200 in the first direction or the second direction.
Further, referring to fig. 1 to 5, in an embodiment of the present invention, a push-pull assembly 700 for pushing the moving platform 310 to move along the extending direction of the piston rod 403 relative to the cylinder 401 to be tested is disposed on the detecting platform 100, and the push-pull assembly 700 is linked with the lifting rack 203.
Specifically, as shown in fig. 5 and fig. 7, in the embodiment of the present invention, the push-pull assembly 700 includes a push-pull fluted disc 701, the push-pull fluted disc 701 is rotatably supported on the detection platform 100, and a guide post 702 is fixedly installed on one side of the push-pull fluted disc 701; the push-pull assembly 700 further comprises a push-pull frame 703, a push-pull cavity 704 matched with the guide post 702 is formed in the push-pull frame 703, the guide post 702 is supported and slides against the push-pull cavity 704, and when the push-pull fluted disc 701 rotates, the guide post 702 is driven to perform circular motion so as to push the push-pull frame 703 to move.
Further, as shown in fig. 2 and fig. 3, in the embodiment of the present invention, a support rail 105 is disposed on the detection platform 100, and a bottom end support of the push-pull frame 703 is slidably disposed on the support rail 105; the detection platform 100 is further provided with a support channel 102, and the push-pull frame 703 is disposed through the support channel 102.
Further, as shown in fig. 3 to 7, in the embodiment of the present invention, a first positioning member is provided at the top end of the push-pull frame 703, and a plurality of second positioning grooves 309 are provided on the lower surface of the moving platform 310 at equal intervals, where the second positioning grooves 309 are adapted to the first positioning member.
Further, as shown in fig. 1 and fig. 5, in the embodiment of the present invention, a second positioning member 800 is installed at an end of the moving platform 310, and a plurality of first positioning grooves 106 adapted to the second positioning member 800 are formed on the detecting platform 100 at equal intervals.
In this embodiment of the present invention, the sliding platform 310 is pushed to move along the direction in which the piston rod 403 extends relative to the cylinder 401 to be tested when the sliding frame 703 reciprocates by using the cooperation of the first positioning member and the second positioning member 800.
In the embodiment of the present invention, as shown in fig. 5 and fig. 7, the first positioning member includes a first supporting slider 706, where the first supporting slider 706 is slidably supported in a supporting cavity 705 by a first connecting spring 707, and the supporting cavity 705 is opened at the top of the push-pull frame 703; the first positioning piece further comprises a first positioning block 708, the first positioning block 708 is fixedly connected with the first supporting sliding block 706, the first positioning block 708 is provided with a first inclined surface 7081, and the first inclined surface 7081 faces in the same direction as the direction of the retraction motion of the piston rod 403 relative to the cylinder 401 to be detected.
With continued reference to fig. 1, 5 and 6, in the embodiment of the present invention, the second positioning member 800 includes a support 801, the support 801 is fixedly mounted on the moving platform 310, an inner cavity of the support 801 is slidably supported by a second connecting spring 804 and provided with a second supporting slider 802, a second positioning block 803 is fixedly mounted on the second supporting slider 802, a second inclined surface 8031 is formed on the second positioning block 803, and the direction of the second inclined surface 8031 is opposite to that of the first inclined surface 7081.
Specifically, in the process of using the first positioning element and the second positioning element 800 in a matching manner, because the first inclined surface 7081 abuts against the second positioning groove 309, when the moving direction of the push-pull frame 703 is the same as the extending direction of the piston rod 403 relative to the cylinder 401 to be tested, the straight surface of the first inclined surface 7081 abuts against the inner wall surface of the second positioning groove 309, so as to push the moving platform 310 to move synchronously, and in the process of moving the moving platform 310, when the second positioning block 803 displaces relative to the detecting platform 100, the second inclined surface 8031 abuts against the edge of the first positioning groove 106, and the second positioning block 803 has the action of retracting into the support 801, so that the second positioning element 800 does not influence the moving platform 310 to move along the extending direction of the piston rod 403 relative to the cylinder 401 to be tested; on the contrary, when the moving direction of the push-pull frame 703 is the same as the direction of the retracting action of the piston rod 403 relative to the cylinder 401 to be tested, the second positioning member 800 has the effect of limiting the movement of the moving platform 310, in this process, the moving platform 310 will not move relative to the detecting platform 100, that is, when the push-pull frame 703 reciprocates, the moving platform 310 will intermittently displace relative to the detecting platform 100 by cooperating with the use of the first positioning member and the second positioning member 800, so that the position of the piston 402 to be tested in the cylinder 401 to be tested is intermittently adjusted.
Further, in the process of intermittently adjusting the position of the piston 402 to be measured in the cylinder 401 to be measured, the lifting rack 203 is a moving process, and the moving process of the lifting rack 203 pushes the air source piston 201 to change the position of the air source piston in the air source cylinder 200, so as to continuously inject air into the cylinder 401 to be measured, so as to detect the tightness between the piston 402 to be measured and the inner wall of the cylinder 401 to be measured, and the detection result is judged by observing whether air bubbles are generated in the water in the observation water tank 500.
Further, in order to realize the linkage between the push-pull assembly 700 and the lifting rack 203, as shown in fig. 1-3, in the embodiment of the present invention, a linkage gear 709 is further rotatably supported on the detection platform 100, the linkage gear 709 is meshed with the lifting rack 203, and the linkage gear 709 is in transmission connection with the push-pull fluted disc 701 through a sprocket manner, so that when the lifting rack 203 moves, the push-pull fluted disc 701 is synchronously driven to rotate to push the push-pull frame 703 to perform periodic reciprocating movement.
With continued reference to fig. 1, 2 and 8, in the embodiment of the present invention, the pressure release component 600 is further connected to the first pipeline 202, and the pressure release component 600 is configured to release pressure after the air pressure in the first pipeline 202 reaches a threshold value, so as to avoid that the air pressure in the cylinder 401 to be tested is too high, and the lifting rack 203 cannot perform a displacement action.
Specifically, as shown in fig. 8, in the embodiment of the present invention, the pressure release member 600 includes a housing 601 fixedly installed on the detection platform 100, a first piston 602 and a second piston 603 are slidably supported in the housing 601 in a supporting manner, the first piston 602 is connected with the second piston 603 by a supporting spring 604, an inner cavity at one end of the housing 601 is communicated with the first pipeline 202 by a connecting pipeline 607, an operation screw 606 for adjusting a position of the second piston 603 in the housing 601 is disposed at the other end of the housing 601, the pressure release member 600 is rotatably connected with the second piston 603 in a threaded manner, and the end of the operation screw 606 is rotatably connected with the second piston 603 in a rotating manner, so that the operation screw 606 can be manually rotated, so that the operation screw 606 generates displacement relative to the housing 601, thereby adjusting a position of the second piston 603 in the housing 601.
Further, in the embodiment of the present invention, the middle section of the box 601 is further provided with an air hole 608; positioning ribs 605 are fixedly arranged in the box body 601, and the positioning ribs 605 are positioned on the inner wall of the box body 601 between the air holes 608 and the second piston 603.
When the air pressure in the first pipeline 202 increases, the first piston 602 is pushed to displace in the tank 601, so that the first piston 602 passes through the air hole 608 and is exhausted through the air hole 608 to realize pressure relief, therefore, the pressure in the cylinder 401 to be tested can be kept relatively reasonable through the pressure relief component 600, and the tightness of the contact surface between the piston 402 to be tested and the inner wall of the cylinder 401 to be tested can be detected based on the air pressure generated by the pressure.
It can be appreciated that the air source piston 201 moves in the air source cylinder 200 by the movement of the lifting rack 203 to continuously supply air to the cylinder 401 to be tested, and the piston 402 to be tested also generates intermittent displacement in the cylinder 401 to be tested due to the movement of the lifting rack 203, and the cylinder 401 to be tested maintains relatively reasonable pressure by the pressure release component 600, so that the tightness of the piston 402 to be tested in different positions in the cylinder 401 to be tested can be continuously maintained.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The device for detecting the tightness of the pneumatic actuator is used for detecting the tightness of the pneumatic actuator to be detected, the pneumatic actuator to be detected comprises a cylinder body to be detected and a piston to be detected, which is arranged in the cylinder body to be detected in a sliding sealing manner, and a piston rod is fixedly arranged on the piston to be detected; the method is characterized in that:
the pneumatic actuator tightness detection device comprises:
the clamping mechanism is fixedly arranged on the detection platform in a supporting manner and used for fixing the pneumatic actuator to be detected, the clamping mechanism comprises a mounting platform and a moving platform, one end of the moving platform is fixedly provided with a movable plate, and the movable plate is fixedly connected with the end part of the piston rod;
the air supply mechanism comprises an air supply cylinder, the air supply cylinder is fixed on the detection platform, an air supply piston is arranged in the air supply cylinder, and the air supply mechanism further comprises a feeding assembly, wherein the feeding assembly is used for pushing the air supply piston to move in the air supply cylinder; the air source cylinder is respectively provided with an air inlet pipe and a first pipeline in a communicated mode; the other end of the first pipeline is connected with an A nozzle on the cylinder body to be tested;
and one end of the second pipeline is connected with the B nozzle on the cylinder body to be detected, the other end of the second pipeline extends into an observation water tank, and the observation water tank is arranged on the detection platform.
2. The pneumatic actuator tightness detection device according to claim 1, wherein a first check valve is arranged on the first pipeline, and the first check valve is used for enabling gas in the gas source cylinder to enter the first pipeline in a one-way manner;
the air inlet pipe is provided with a second one-way valve, and the second one-way valve is used for enabling air in the air inlet pipe to enter the air source cylinder in a one-way mode.
3. The device for detecting tightness of a pneumatic actuator according to claim 2, wherein the moving platform is pushed to move along the direction in which the piston rod extends relative to the cylinder to be detected when the feeding assembly is operated;
the feeding assembly comprises a lifting rack, the top end of the lifting rack is fixedly connected with a lifting block, the lifting block is arranged on a height-adjusting screw rod in a threaded connection mode, and the rotation of the height-adjusting screw rod is driven by a forward and reverse rotation servo motor;
the bottom of the lifting rack penetrates through and extends into the air source cylinder, and the bottom of the lifting rack is fixedly connected with the air source piston.
4. The device for detecting the tightness of the pneumatic actuator according to claim 3, wherein the detection platform is provided with a push-pull assembly for pushing the moving platform to move along the extending direction of the piston rod relative to the cylinder body to be detected, and the push-pull assembly is in linkage with the lifting rack.
5. The pneumatic actuator tightness detection device according to claim 4, wherein the push-pull assembly comprises a push-pull fluted disc, the push-pull fluted disc is rotatably supported on the detection platform, and a guide post is fixedly arranged on one side of the push-pull fluted disc; the push-pull assembly further comprises a push-pull frame, a push-pull cavity matched with the guide post is formed in the push-pull frame, and the guide post supports and slides against the push-pull cavity.
6. The pneumatic actuator tightness detection device according to claim 5, wherein a first positioning piece is arranged at the top end of the push-pull frame, a plurality of second positioning grooves are formed in the lower surface of the moving platform at equal intervals, and the second positioning grooves are matched with the first positioning piece;
the end part of the mobile platform is provided with a second locating piece, and a plurality of first locating grooves matched with the second locating piece are formed in the detection platform at equal intervals.
7. The pneumatic actuator tightness detection device according to claim 6, wherein the first positioning piece comprises a first supporting sliding block, the first supporting sliding block is supported and slidingly arranged in a supporting cavity through a first connecting spring, and the supporting cavity is arranged at the top of the push-pull frame; the first locating piece further comprises a first locating block, the first locating block is fixedly connected with the first supporting sliding block, a first inclined surface is arranged on the first locating block, and the first inclined surface faces in the same direction with the direction of retracting action of the piston rod relative to the cylinder body to be detected.
8. The pneumatic actuator tightness detection device according to claim 7, wherein the second positioning piece comprises a support, the support is fixedly installed on the moving platform, an inner cavity of the support is supported and slidably provided with a second support sliding block through a second connecting spring, a second positioning block is fixedly installed on the second support sliding block, a second inclined surface is formed on the second positioning block, and the direction of the second inclined surface is opposite to that of the first inclined surface.
9. The device for detecting the tightness of the pneumatic actuator according to any one of claims 6 to 8, wherein a linkage gear is further rotatably supported on the detection platform, the linkage gear is meshed with the lifting rack, and the linkage gear is in transmission connection with the push-pull fluted disc through a sprocket.
10. The pneumatic actuator tightness detection device according to any of claims 4-8, wherein the first pipe is further provided with a pressure release member;
the pressure release component comprises a box body fixedly arranged on the detection platform, a first piston and a second piston are arranged in the box body in a supporting, sealing and sliding manner, the first piston and the second piston are connected through a supporting spring, an inner cavity at one end of the box body is communicated with the first pipeline through a connecting pipeline, an operation screw rod for adjusting the position of the second piston in the box body is arranged at the other end of the box body, the pressure release component is rotatably arranged at the other end of the box body in a penetrating manner in a threaded connection manner, and the end part of the operation screw rod is rotatably connected with the second piston;
the middle section of the box body is also provided with an air hole; and positioning ribs are fixedly arranged in the box body and positioned on the inner wall of the box body between the air holes and the second piston.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310664538.1A CN116399518B (en) | 2023-06-07 | 2023-06-07 | Sealing performance detection device for pneumatic actuator |
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| CN202310664538.1A CN116399518B (en) | 2023-06-07 | 2023-06-07 | Sealing performance detection device for pneumatic actuator |
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| CN116399518B CN116399518B (en) | 2023-08-15 |
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| CN116399518B (en) | 2023-08-15 |
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