CN113532756B - Pneumatic mechanism for detecting air tightness of two-position three-way electromagnetic valve - Google Patents
Pneumatic mechanism for detecting air tightness of two-position three-way electromagnetic valve Download PDFInfo
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- CN113532756B CN113532756B CN202110669268.4A CN202110669268A CN113532756B CN 113532756 B CN113532756 B CN 113532756B CN 202110669268 A CN202110669268 A CN 202110669268A CN 113532756 B CN113532756 B CN 113532756B
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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
- G01M3/08—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 pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/086—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 pipes, cables or tubes; for pipe joints or seals; for valves; for welds for valves
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- Multiple-Way Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a pneumatic mechanism for detecting the air tightness of a two-position three-way electromagnetic valve, which comprises the following components: a main cylinder, an auxiliary cylinder and a guide rod; the auxiliary cylinder is arranged on the lower fixed plate, and the end part of a piston rod of the auxiliary cylinder is supported by the upper fixed plate; one end of the guide rod is fixed on the lower fixed plate, and the other end of the guide rod is supported in the mounting hole of the upper fixed plate through the roller assembly; the piston rod of the auxiliary cylinder can drive the upper fixing plate to move upwards or downwards along the guide rod; two sliding rods arranged on opposite sides are fixed between the upper fixing plate and the lower plate assembly; the lower plate assembly is positioned between the upper fixed plate and the lower fixed plate, and an air passage for pressurizing the valve core of the two-position three-way electromagnetic valve is arranged in the lower plate assembly; the main cylinder is fixed on the upper fixed plate, a piston rod of the main cylinder is fixed on the upper plate assembly, two ends of the upper plate assembly are sleeved on the sliding rod, and the upper plate assembly is in sliding fit with the sliding rod; the piston rod of the main cylinder moves up and down to drive the upper plate assembly to move up and down along the sliding rod; wherein, the upper plate assembly is located between upper fixed plate and the lower plate assembly.
Description
Technical Field
The invention relates to the technical field of pneumatic transmission and control, in particular to a pneumatic mechanism for detecting the air tightness of a two-position three-way electromagnetic valve.
Background
At present, the central inflation and deflation system of the vehicle tire mostly adopts pneumatic and control technology, is used for realizing inflation, deflation and pressure measurement functions of the wheel type vehicle tire, and meets the requirements of road, gravel, mud and other roads of the wheel type vehicle on tire pressure. The two-position three-way electromagnetic valve is used as a pneumatic control element for the air path control element of the tire central inflation and deflation system, is a direct-acting two-position three-way electromagnetic valve, and has higher air tightness in use, so that the air tightness detection test is needed to meet the use requirement of products. At present, the electromagnetic valve has the defects of high working strength, low efficiency, corrosiveness to the electromagnetic valve and the like in the air tightness detection of the electromagnetic valve; in addition, the gas tightness leak detector is adopted, the structure is complex, the cost is high, and the gas micro-leakage detection is difficult.
Disclosure of Invention
In view of the above, the invention provides a pneumatic mechanism for detecting the air tightness of a two-position three-way electromagnetic valve, which realizes the fixed clamping and directional movement of the two-position three-way electromagnetic valve and the inflation and pressurization of the two-position three-way electromagnetic valve by controlling the movement of an air cylinder, detects the air tightness of a two-position three-way electromagnetic valve cavity and a valve core of the two-position three-way electromagnetic valve, and ensures that a product meets the use requirement.
The technical scheme of the invention is as follows: a pneumatic mechanism for two-position three-way solenoid valve air tightness detection, comprising: a main cylinder, an auxiliary cylinder and a guide rod; the auxiliary cylinder is arranged on the lower fixed plate, and the end part of a piston rod of the auxiliary cylinder is supported by the upper fixed plate; one end of the guide rod is fixed on the lower fixed plate, and the other end of the guide rod is supported in the mounting hole of the upper fixed plate through the roller assembly; the piston rod of the auxiliary cylinder can drive the upper fixing plate to move upwards or downwards along the guide rod;
two sliding rods arranged on opposite sides are fixed between the upper fixing plate and the lower plate assembly; the lower plate assembly is positioned between the upper fixed plate and the lower fixed plate, an air passage for pressurizing the valve core of the two-position three-way electromagnetic valve is arranged in the lower plate assembly, an accessory end post assembly is arranged at the top of the two-position three-way electromagnetic valve, and the interior of the lower plate assembly is matched with the accessory end post assembly to detect the tightness of the valve core of the two-position three-way electromagnetic valve;
the main cylinder is fixed on the upper fixing plate, a piston rod of the main cylinder is fixed on the upper plate assembly, two ends of the upper plate assembly are sleeved on the sliding rod, and the upper plate assembly is in sliding fit with the sliding rod; the piston rod of the main cylinder moves up and down to drive the upper plate assembly to move up and down along the sliding rod; the upper plate assembly is positioned between the upper fixing plate and the lower plate assembly, and an air passage for pressurizing the inner cavity of the valve body of the two-position three-way electromagnetic valve is arranged in the upper plate assembly so as to detect the tightness of the inner cavity of the two-position three-way electromagnetic valve.
Preferably, the roller assembly rolls up or down along the guide bar.
Preferably, the roller assembly includes: the roller, the roller shaft and the roller seat; the roller is dumbbell-shaped, the middle part of the roller is a semicircular annular groove, and the roller is axially provided with a through hole; the roller shaft is a step shaft with thick middle and thin two ends; the roller seat is a cuboid, one side of the roller seat in the width direction is provided with two counter bores, and the center of each counter bore is provided with a threaded through hole communicated with the other side; the two rollers are respectively arranged between the two roller seats in parallel through the roller shafts, each roller is in running fit with the roller shaft, and the roller seats are arranged in corresponding mounting holes on the upper fixing plate.
Preferably, the lower plate assembly includes: a lower valve plate and a positioning shaft; the lower valve plate is a rectangular plate, through holes axially along the thickness direction are formed in the middle and at two sides of the length direction, the through holes in the middle are used as lightening holes, and the through holes at two sides of the length direction are used for installing sliding rods; one end face of the lower valve plate in the thickness direction is provided with more than one pair of counter bores, the center of each counter bore is a through hole penetrating through the thickness direction, and two sides of the center through hole of each counter bore are respectively provided with a threaded hole for installing a positioning shaft; one end of the positioning shaft is a disc, the other end of the positioning shaft is a circular shaft, two through holes are formed in the disc end, the disc ends of more than one pair of positioning shafts are correspondingly arranged in counter bores on the lower valve plate, and the positioning shaft is matched with the mounting holes at the bottom of the two-position three-way electromagnetic valve and used for positioning the two-position three-way electromagnetic valve;
the inside of the lower valve plate is provided with a through hole along the length direction, one side of the width direction is provided with more than one blind hole along the width direction, the through hole and the blind holes form a communicated air passage, both ends of the through hole and the outer ends of the more than one blind hole are provided with internal threads, and five plugs II are respectively arranged at one ends of the more than one blind hole and the through hole of the lower valve plate and used for plugging the air passage in the lower valve plate; the pipe joint II is arranged at the other end of the through hole of the lower valve plate and is used as an air source interface for pressurizing the bottom center position of the two-position three-way electromagnetic valve during test so as to detect the tightness of the valve core sealing part of the two-position three-way electromagnetic valve.
Preferably, the accessory end post assembly comprises: the sealing device comprises an end seat, a sealing joint and a rubber tube; the end seat is a step cylinder, an annular groove is arranged on the step surface of the end seat, and an O-shaped ring II is arranged in the annular groove; a plane is arranged on the outer circumferential surface of the large end of the end seat, a blind hole is arranged at the plane along the radial direction of the end seat, and the blind hole is communicated with a through hole arranged in the center of the small end of the end seat; the sealing joint is a round shaft with a cylindrical shaft shoulder in the middle, and a through hole is formed in the center of the round shaft; one end of the sealing joint is provided with an external thread, the end surface of the sealing joint is provided with an annular groove, and the opposite side of the outer circumferential surface of one end of the cylindrical shaft shoulder corresponding to the other end of the sealing joint is provided with two planes; one end of the sealing joint, which is provided with external threads, is sleeved with an O-shaped ring III and is installed in a blind hole on the side face of the end seat, the other end of the sealing joint is provided with a rubber tube, when the sealing performance of the valve core is detected by pressing from the bottom of the two-position three-way electromagnetic valve, one end of the end seat, which is provided with an annular groove, is installed at the top of the two-position three-way electromagnetic valve, and the piston rod of the main cylinder moves downwards to push the upper plate assembly to move downwards, so that the end seat and the two-position three-way electromagnetic valve are pressed, whether the rubber tube put into water has bubbles or not is observed, and the sealing performance of the valve core sealing part of the two-position three-way electromagnetic valve is detected.
Preferably, the upper fixing plate is parallel to the lower fixing plate.
Preferably, the lower plate assembly is parallel to the upper and lower fixed plates.
Preferably, the upper plate assembly is parallel to the upper fixed plate and the lower plate assembly.
Preferably, the method further comprises: the device comprises a connecting plate, a push plate and a shaft pin; a push plate is arranged at the end part of a piston rod of the main cylinder and is connected with a connecting plate through a shaft pin, and the connecting plate is fixed on the upper plate assembly to fix the piston rod of the main cylinder on the upper plate assembly.
Preferably, the upper plate assembly includes: the device comprises an upper valve plate, a sealing end seal assembly, an inflation shaft, a large spring, a guide sleeve and a small spring;
the upper valve plate is a rectangular plate, a middle threaded hole is formed in the middle of the upper valve plate and used for being connected with a piston rod of a main cylinder, more than two through holes are formed in the periphery of the middle threaded hole and used for installing a push plate, two step holes and a through hole are respectively formed in two sides of the length direction of the upper valve plate, threaded holes are formed in each step hole along two sides of the length direction of the upper valve plate and used for installing a sealing assembly, and each through hole is used for fixing a guide sleeve; the sealing end sealing assembly is a cylinder with three end face through holes, an annular groove is formed in the middle end face through hole, an O-shaped ring IV is arranged in the annular groove, more than one pair of sealing end sealing assemblies are respectively and correspondingly arranged on two sides of the upper valve plate in the thickness direction, and the end face through holes on the two sides of the sealing end sealing assembly are used for being connected and reinforced with the upper valve plate;
the inflatable shaft is a step shaft, three step surfaces formed by four sections of cylinders are close to one end, the outer diameters of the first three sections of cylinders are sequentially increased from the end, and the outer diameter of the fourth section of cylinders is smaller than the outer diameters of the middle two sections of cylinders, so that the step shaft can be divided into a short step shaft and a long step shaft; one end of the short step shaft is provided with a central blind hole, the bottom of the central blind hole is communicated with a radial through hole of the long step shaft, the end part of the long step shaft is provided with a threaded blind hole, the end of the long step shaft of each inflation shaft penetrates through the middle end surface through holes of the two sealing end sealing assemblies in the same step hole, the end parts of the two sealing end sealing assemblies are fastened through fixing screws, and the radial through holes arranged on the long step shafts of more than one inflation shaft are communicated through air passage holes arranged in the upper valve plate; the large spring and the small spring are sleeved on the outer circumference of the long step shaft of the inflation shaft, and two ends of the large spring and the small spring respectively abut against the sealing end seal assembly and the step surface of the long step shaft; an O-shaped ring I is arranged at the step of the end of the short step shaft of the inflation shaft; the plug I is arranged on one side of the length direction of the upper valve plate and used for blocking an air passage in the upper valve plate; the pipe joint I is arranged on the other side of the length direction of the upper valve plate and is an air source interface for pressing the inflation shaft from the top end of the two-position three-way electromagnetic valve to the cavity of the two-position three-way electromagnetic valve during test so as to detect the inner cavity tightness of the two-position three-way electromagnetic valve.
The beneficial effects are that:
1. according to the pneumatic mechanism, when the inner cavity of the two-position three-way electromagnetic valve is pressurized for testing, the piston rod of the main cylinder moves downwards to press the two-position three-way electromagnetic valve between the upper plate assembly and the lower plate assembly, the piston rod of the auxiliary cylinder moves downwards to enable the two-position three-way electromagnetic valve to fall into the water tank, the two-position three-way electromagnetic valve is pressurized from the upper plate assembly into the inner cavity of the valve body of the two-position three-way electromagnetic valve, whether the two-position three-way electromagnetic valve leaks air or not is observed, and the inner cavity tightness of the two-position three-way electromagnetic valve can be detected; when the valve core of the two-position three-way electromagnetic valve is subjected to sealing test, the accessory end column assembly is placed at the top air port of the two-position three-way electromagnetic valve, the piston rod of the main cylinder moves downwards, so that the upper plate assembly moves downwards along the sliding rod, and the upper plate assembly compresses the end face of the accessory end column assembly, so that the two-position three-way electromagnetic valve is compressed and fixed on the lower plate assembly; introducing pressurized gas from a pressurized gas source interface of the lower plate assembly, observing whether bubbles seep out from a rubber tube of an accessory end column assembly placed in the water tank, and detecting the tightness of a valve core of the two-position three-way electromagnetic valve; the two-position three-way electromagnetic valve is electrified to work, whether bubbles seep out from a rubber pipe placed in the water tank or not is observed, and the tightness of the upper port of the two-position three-way electromagnetic valve can be detected when the two-position three-way electromagnetic valve works; the pneumatic mechanism has the characteristics of visual detection, high efficiency, simple structure and reliable detection.
2. According to the invention, the roller assembly is matched with the auxiliary cylinder, so that the upper fixing plate can be limited to rotate in the horizontal direction.
3. The roller assembly in the pneumatic mechanism is specifically arranged, so that the upper fixing plate can be ensured to slide up and down along the guide rod, friction force during directional movement is reduced, and the upper fixing plate can be effectively limited to rotate in a horizontal plane; meanwhile, when the pneumatic mechanism auxiliary cylinder moves up and down in the air tightness detection test of the two-position three-way electromagnetic valve is reduced by adopting a rolling structure, the two-position three-way electromagnetic valve is pressed and fixed through the movement control of the piston rods of the main cylinder and the auxiliary cylinder, the sealing performance of the two-position three-way electromagnetic valve cavity and the valve core is detected through the pressing and bottom pressing test of the upper plate assembly and the lower plate assembly in the two-position three-way electromagnetic valve cavity, the sealing performance of the two-position three-way electromagnetic valve cavity and the valve core is ensured through the air tightness detection test pneumatic action mechanism of the two-position three-way electromagnetic valve, the detection efficiency is improved, and the pneumatic mechanism has the characteristics of simple structure and convenience in use.
4. The lower plate assembly adopts a positioning shaft to position the two-position three-way electromagnetic valve and provides an air pressure channel for detecting the valve core tightness of the two-position three-way electromagnetic valve; the inflation shaft of the upper plate assembly adopts a double spring to balance the sealing pressure when the tops of the two-position three-way electromagnetic valves are pressed, so that the tightness of a plurality of two-position three-way electromagnetic valves is simultaneously detected, and an air pressure channel for tightness detection of the two-position three-way electromagnetic valve cavity is provided.
5. The specific design of the accessory end column assembly can accurately assist the two-position three-way electromagnetic valve in performing valve core sealing test.
6. The upper fixing plate and the lower fixing plate are arranged in parallel, so that the overall balance of the pneumatic mechanism can be effectively ensured when the auxiliary cylinder acts.
7. The lower plate assembly, the upper fixing plate and the lower fixing plate are arranged in parallel, so that the upper fixing plate can be effectively ensured to move up and down, and the lower plate assembly is synchronously driven to perform consistent actions.
8. The upper plate assembly is parallel to the upper fixing plate and the lower plate assembly, so that the upper plate assembly can slide up and down smoothly along the sliding rod when the main cylinder acts, and the possibility of movement interference between the upper plate assembly and the sliding rod is reduced.
9. The connecting plate, the push plate and the shaft pin are specifically arranged, so that the piston rod of the main cylinder and the upper plate assembly can be effectively and stably connected into a whole.
10. The upper plate assembly is specifically arranged, can be matched with the main cylinder and the lower plate assembly, realizes the compression fixation of the two-position three-way electromagnetic valve, can press gas into the valve body cavity of the two-position three-way electromagnetic valve through the pressing gas source interface on the upper plate assembly, and detects the tightness of the inner cavity of the two-position three-way electromagnetic valve by observing whether the two-position three-way electromagnetic valve leaks gas or not.
Drawings
FIG. 1 is a schematic view of the overall structure of the pneumatic mechanism of the present invention.
FIG. 2 is a schematic view of the upper plate assembly of the present invention.
FIG. 3 is a schematic view of the structure of the lower plate assembly according to the present invention.
Fig. 4 is a schematic structural view of a roller assembly according to the present invention.
FIG. 5 is a schematic view of an accessory end post assembly of the present invention.
Fig. 6 is a schematic diagram of a two-position three-way electromagnetic valve, an external schematic diagram, and an internal structure schematic diagram.
Fig. 7 is a schematic structural view, a front view and a sectional view of an upper disc of the present invention.
Fig. 8 is a three-dimensional view of a guide sleeve in the present invention.
FIG. 9 is a schematic view, front view and cross-sectional view of a seal assembly of the present invention.
Fig. 10 is a schematic structural view, a three-dimensional view and a sectional view of an inflatable shaft according to the present invention.
Fig. 11 is a schematic structural view, a three-dimensional view and a front view of a lower disc of the present invention.
Fig. 12 is a three-dimensional view of the positioning shaft in the present invention.
Fig. 13 is a three-dimensional view of a roller in accordance with the present invention.
Fig. 14 is a three-dimensional view of a roller shaft in accordance with the present invention.
Fig. 15 is a three-dimensional view of the roller mount of the present invention.
Fig. 16 is a schematic structural view, a three-dimensional view and a sectional view of the end seat according to the present invention.
Fig. 17 is a three-dimensional view of a sealing joint in accordance with the present invention.
FIG. 18 is a block diagram of the present invention illustrating the pressurization of the interior chamber of a two-position three-way solenoid valve.
FIG. 19 is a block diagram of the valve core seal pressing of the two-position three-way solenoid valve of the present invention.
1, a roller assembly; 2. an upper plate assembly; 3. a lower plate assembly; 4. a lower fixing plate; 5. an upper fixing plate; 6. a main cylinder; 7. an auxiliary cylinder; 8. a guide rod; 9. a slide bar; 10. a connecting plate; 11. a push plate; 12. a shaft pin; 13. an upper valve plate; 14. a sealing end seal assembly; 15. an inflation shaft; 16. a large spring; 17. guide sleeve; 18. a small spring; 19. a fixing screw; 20. a plug I; 21. a pipe joint I; 22. o-shaped ring I; 23. a lower valve plate; 24. positioning a shaft; 25. a plug II; 26. a pipe joint II; 27. a roller; 28. a roller shaft; 29. a roller seat; 30. an end seat; 31. sealing the joint; 32. o-shaped ring II; 33. o-ring III; 34. a rubber tube; 35. a two-position three-way electromagnetic valve; 36. an accessory end post assembly.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
The embodiment provides a pneumatic mechanism for detecting the air tightness of a two-position three-way electromagnetic valve, which realizes the fixed clamping, directional movement and inflation pressurizing of the two-position three-way electromagnetic valve by controlling the movement of an air cylinder, detects the air tightness of a two-position three-way electromagnetic valve cavity and a valve core of the pneumatic mechanism, and ensures that a product meets the use requirement.
As shown in fig. 1, the pneumatic mechanism includes: the device comprises a roller assembly 1, an upper plate assembly 2, a lower plate assembly 3, a lower fixed plate 4, an upper fixed plate 5, a main cylinder 6, an auxiliary cylinder 7, a guide rod 8, a sliding rod 9, a connecting plate 10, a push plate 11 and a shaft pin 12; the cylinder body end of the auxiliary cylinder 7 is arranged on the lower fixed plate 4, the piston rod end of the auxiliary cylinder 7 is fixedly provided with the upper fixed plate 5, and the upper fixed plate 5 is parallel to the lower fixed plate 4; one end of a guide rod 8 is fixedly arranged on the lower fixed plate 4, and the other end of the guide rod is supported in a mounting hole on the upper fixed plate 5 through the roller assembly 1; when the auxiliary cylinder 7 acts, the piston rod end drives the upper fixing plate 5 to move up or down along the guide rod 8; the roller assembly 1 arranged on the upper fixed plate 5 rolls upwards or downwards along the guide rod 8, and the roller assembly 1 and the auxiliary cylinder 7 jointly limit the upper fixed plate 5 to rotate in the horizontal direction;
the two sliding rods 9 are arranged in parallel, one ends of the two sliding rods are respectively fixed on two opposite sides of the upper fixed plate 5, and the other ends of the two sliding rods are respectively installed and fixed on two opposite sides of the lower plate assembly 3; wherein the lower plate assembly 3 is parallel and between the upper fixing plate 5 and the lower fixing plate 4;
the cylinder body end of the main cylinder 6 is fixed on the upper fixed plate 5, a push plate 11 is arranged at the piston rod end of the main cylinder, the push plate 11 is connected with a connecting plate 10 through a shaft pin 12, the connecting plate 10 is fixed on the upper plate assembly 2, and two ends of the upper plate assembly 2 are sleeved on the sliding rod 9; the top of the two-position three-way electromagnetic valve 35 can be arranged below the upper plate assembly 2 through an accessory end column assembly 36, the bottom is arranged on the lower plate assembly 3, and a normally closed port at the bottom is communicated with an air passage in the lower plate assembly 3; the piston rod of the main cylinder 6 moves up and down to drive the upper plate assembly 2 to move up and down along the sliding rod 9; wherein the upper plate assembly 2 is parallel and between the upper fixed plate 5 and the lower plate assembly 3.
In this embodiment, as shown in fig. 2, the upper plate assembly 2 includes: the upper valve plate 13, the sealing end seal assembly 14, the inflation shaft 15, the large spring 16, the guide sleeve 17, the small spring 18, the fixing screw 19, the plug I20, the pipe joint I21 and the O-shaped ring I22; as shown in fig. 7, the upper valve plate 13 is a rectangular plate, a middle threaded hole is formed in the middle of the upper valve plate 13, four through holes are formed around the middle threaded hole and used for installing the push plate 11, two step holes are respectively formed on two sides of the upper valve plate 13 in the length direction, threaded holes are formed on two sides of each step hole along the upper valve plate 13 in the length direction and used for installing the sealing assembly 14, and through holes with the axial direction consistent with the thickness direction are formed on two sides of the upper valve plate 13 in the length direction and used for fixing the guide sleeve 17; as shown in fig. 8, the guide sleeve 17 is a stepped cylinder provided with a central through hole, and is installed in the through holes on two sides of the upper valve plate 13 in an interference fit manner; as shown in fig. 9, the sealing end sealing assemblies 14 are cylinders with three end surface through holes, an annular groove is formed in the middle end surface through hole, an O-ring iv is arranged in the annular groove, eight sealing end sealing assemblies 14 are respectively and correspondingly arranged at two sides of the upper valve plate 13 in the thickness direction, and the end surface through holes at two sides of each sealing end sealing assembly 14 are used for being connected and reinforced with the upper valve plate 13 by bolts; as shown in fig. 10, the inflation shaft 15 is a stepped shaft, and three stepped surfaces formed by four sections of cylinders included in the inflation shaft are all close to one end, from the end, the outer diameters of the first three sections of cylinders are sequentially increased, and the outer diameter of the fourth section of cylinders is smaller than the outer diameters of the middle two sections of cylinders, so that the stepped shaft can be divided into two sections of a short stepped shaft and a long stepped shaft; one end of the short step shaft is provided with a central blind hole, the bottom of the central blind hole is communicated with a radial through hole of the long step shaft, the end part of the long step shaft is provided with a threaded blind hole, the end of each inflation shaft 15 passes through the middle end surface through holes of two sealing end seal assemblies 14 in the same step hole, the end parts of the two sealing end seal assemblies are fastened through fixing screws 19, and the radial through holes arranged on the long step shafts of the four inflation shafts 15 are communicated through air passage holes arranged in the upper valve plate 13; the large spring 16 and the small spring 18 are sleeved on the outer circumference of the long step shaft of the inflation shaft 15, and two ends of the large spring are respectively abutted against the sealing end seal assembly 14 and the step surface of the long step shaft; an O-shaped ring I22 is arranged at the step of the end of the short step shaft of the inflation shaft 15; the plug I20 is arranged on one side of the upper valve plate 13 in the length direction and is used for blocking an air passage in the upper valve plate 13; the pipe joint I21 is arranged on the other side of the length direction of the upper valve plate 13 and is an air source interface for pressing the inflation shaft 15 from the top end of the two-position three-way electromagnetic valve 35 into the cavity of the two-position three-way electromagnetic valve during test so as to conveniently detect the tightness of the inner cavity of the two-position three-way electromagnetic valve 35.
In this embodiment, as shown in fig. 3, the lower plate assembly 3 includes: the lower valve plate 23, the positioning shaft 24, the plug II 25 and the pipe joint II 26; as shown in fig. 11, the lower valve plate 23 is a rectangular plate, and through holes in the axial direction are provided in the middle and on both sides in the length direction, the through holes in the middle serve as weight-reducing holes, and the through holes on both sides in the length direction are used for mounting the slide rod 9; eight counter bores are formed in the end face of one end of the lower valve plate 23 in the thickness direction, the center of each counter bore is a through hole penetrating through the thickness direction, and two threaded holes are formed in two sides of the center through hole of each counter bore and are used for installing the positioning shaft 24; as shown in fig. 12, one end of the positioning shaft 24 is a disc, the other end of the positioning shaft is a circular shaft, two through holes are formed in the disc end, the disc ends of the eight positioning shafts 24 are correspondingly arranged in eight counter bores on the lower valve plate 23 and are fastened and fixed by screws, and the positioning shafts 24 are matched with mounting holes at the bottom of the two-position three-way electromagnetic valve 35 and are used for positioning the two-position three-way electromagnetic valve 35; the inside of the lower valve plate 23 is provided with a through hole along the length direction, one side of the width direction is provided with four blind holes along the width direction, the through holes and the blind holes form a communicated air passage, both ends of the through holes and the outer ends of the four blind holes are provided with internal threads, and five plugs II 25 are respectively arranged at one ends of the four blind holes and the through holes of the lower valve plate 23 and used for blocking the air passage in the lower valve plate 23; the pipe joint II 26 is arranged at the other end of the through hole of the lower valve plate 23 and is used as an air source interface for pressurizing the bottom center position of the two-position three-way electromagnetic valve 35 during test so as to detect the tightness of the valve core sealing part of the two-position three-way electromagnetic valve 35.
In this embodiment, as shown in fig. 4, the roller assembly 1 includes: a roller 27, a roller shaft 28 and a roller seat 29; as shown in fig. 13, the roller 27 is dumbbell-shaped, and has a semicircular annular groove in the middle, and the roller 27 is axially provided with a through hole; as shown in fig. 14, the roller shaft 28 is a stepped shaft with a thick middle and thin ends; as shown in fig. 15, the roller seat 29 is a cuboid, one side of the width direction of the roller seat is provided with two counter bores, and the center of each counter bore is provided with a threaded through hole communicated with the other side; the two rollers 27 are respectively arranged between the two roller seats 29 in parallel through the roller shafts 28, each roller 27 can rotate on the corresponding roller shaft 28, the roller seat 29 can be arranged in the corresponding mounting hole on the upper fixed plate 5 through a screw, when the piston rod of the auxiliary cylinder 7 drives the upper fixed plate 5 to move up and down, the roller assembly 1 plays a role in directional rolling movement on the upper fixed plate 5, and the friction force during directional movement can be reduced by adopting the roller assembly 1.
In this embodiment, as shown in fig. 5, in the valve core sealing test of the two-position three-way electromagnetic valve 35, the pneumatic mechanism further includes an accessory end post assembly 36, and the accessory end post assembly 36 includes: the end seat 30, the sealing joint 31, the O-shaped ring II 32, the O-shaped ring III 33 and the rubber tube 34; as shown in fig. 16, the end seat 30 is a stepped cylinder, the stepped surface of which is provided with an annular groove, and an O-ring II 32 is arranged in the annular groove; the outer circumferential surface of the large end of the end seat 30 is provided with a plane, the plane is provided with a blind hole along the radial direction of the end seat 30, and the blind hole is communicated with a through hole arranged in the center of the small end of the end seat 30; as shown in fig. 17, the sealing joint 31 is a circular shaft with a cylindrical shaft shoulder in the middle, and a through hole is formed in the center of the circular shaft; one end of the sealing joint 31 is provided with an external thread, the end surface of the sealing joint is provided with an annular groove, and the opposite side of the outer circumferential surface of one end of the cylindrical shaft shoulder corresponding to the other end of the sealing joint 31 is provided with two planes; one end of the sealing joint 31 provided with external threads is sleeved with an O-shaped ring III 33 and is arranged in a blind hole on the side face of the end seat 30, the other end of the sealing joint 31 is provided with a rubber tube 34, when the sealing performance of a valve core is detected by pressing from the bottom of the two-position three-way electromagnetic valve 35, one end of the end seat 30 provided with an annular groove is arranged at the top of the two-position three-way electromagnetic valve 35, and the piston rod of the main cylinder 6 moves downwards to push the upper plate assembly 2 to move downwards, so that the end seat 30 and the two-position three-way electromagnetic valve 35 are pressed, a 3 air source interface of the lower plate assembly is pressed, whether the rubber tube 34 put into water has air bubbles or not is observed, and the sealing performance of the valve core sealing part of the two-position three-way electromagnetic valve 35 is detected.
The working principle of the pneumatic mechanism is as follows: when the inner cavity of the two-position three-way electromagnetic valve 35 is subjected to a pressurizing test, as shown in fig. 18, a mounting hole at the bottom of the two-position three-way electromagnetic valve 35 is in shaft fit with a positioning shaft 24 hole on the lower plate assembly 3, a piston rod of the main cylinder 6 moves downwards, a push plate 11 at the end part of the piston rod pushes a connecting plate 10 connected with a shaft pin 12, so that the upper plate assembly 2 moves downwards along a sliding rod 9, an inflating shaft 15 on the upper plate assembly 2 is inserted into a gas port at the top end of the two-position three-way electromagnetic valve 35, an O-shaped ring I22 on the inflating shaft 15 seals the gas port at the top end of the two-position three-way electromagnetic valve 35, and as the piston rod of the main cylinder 6 moves downwards continuously, a large spring and a small spring on the lower plate assembly 3 are compressed and stressed, and the two-position three-way electromagnetic valve 35 is pressed and fixed on the lower plate assembly 3; the piston rod of the auxiliary cylinder 7 moves downwards, all parts on the upper fixed plate 5 connected with the piston rod move downwards along with the lower part, the roller assembly 1 on the upper fixed plate 5 moves downwards along the guide rod 8 in a rolling way, the two-position three-way electromagnetic valve 35 on the lower plate assembly 3 falls into a water tank for containing water, pressurized gas is introduced from a pressurized gas source interface on the upper plate assembly 2, pressurized gas is pressurized from the gas charging shaft 15 of the upper plate assembly 2 into a valve cavity of the two-position three-way electromagnetic valve 35, whether the two-position three-way electromagnetic valve 35 leaks gas or not is observed, and therefore the inner cavity tightness of the two-position three-way electromagnetic valve 35 is detected;
when the valve core sealing test of the two-position three-way electromagnetic valve 35 is carried out, as shown in fig. 19, the accessory end column assembly 36 is placed at the top end air port of the two-position three-way electromagnetic valve 35, the piston rod of the main cylinder 6 moves downwards, the push plate 11 at the end part of the piston rod pushes the connecting plate 10 connected with the shaft pin 12, so that the upper plate assembly 2 moves downwards along the sliding rod 9, the air charging shaft 15 on the upper plate assembly 2 compresses the end face of the accessory end column assembly 36, and the compression stress of the big spring and the small spring on the lower plate assembly 3 ensures that the two-position three-way electromagnetic valve 35 is compressed and fixed on the lower plate assembly 3; the pressurized gas is introduced from the pressurized gas source interface of the lower plate assembly 3, whether bubbles seep out from the rubber tube 34 of the accessory end post assembly 36 placed in the water tank or not is observed, and the tightness of the valve core of the two-position three-way electromagnetic valve 35 can be detected; the two-position three-way electromagnetic valve 35 is electrified to work, whether the rubber tube 34 placed in the water tank has bubbles oozed or not is observed, and the tightness of the upper port of the two-position three-way electromagnetic valve 35 can be detected when the two-position three-way electromagnetic valve 35 works.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a pneumatic mechanism that two-position three way solenoid valve gas tightness detected which characterized in that includes: a main cylinder (6), an auxiliary cylinder (7) and a guide rod (8); the auxiliary cylinder (7) is arranged on the lower fixed plate (4), and the end part of a piston rod of the auxiliary cylinder is supported with the upper fixed plate (5); one end of a guide rod (8) is fixed on the lower fixed plate (4), and the other end of the guide rod is supported in a mounting hole of the upper fixed plate (5) through a roller assembly (1); the piston rod of the auxiliary cylinder (7) can drive the upper fixing plate (5) to move upwards or downwards along the guide rod (8);
two sliding rods (9) arranged on opposite sides are fixed between the upper fixing plate (5) and the lower plate assembly (3); the lower plate assembly (3) is positioned between the upper fixing plate (5) and the lower fixing plate (4), an air passage for pressurizing a valve core of the two-position three-way electromagnetic valve (35) is arranged in the lower plate assembly (3), an accessory end post assembly (36) is arranged at the top of the two-position three-way electromagnetic valve (35), and the interior of the lower plate assembly (3) is matched with the accessory end post assembly (36) to detect the tightness of the valve core of the two-position three-way electromagnetic valve (35);
the main air cylinder (6) is fixed on the upper fixed plate (5), a piston rod of the main air cylinder is fixed on the upper plate assembly (2), two ends of the upper plate assembly (2) are sleeved on the sliding rod (9), and the upper plate assembly (2) is in sliding fit with the sliding rod (9); the piston rod of the main cylinder (6) moves up and down to drive the upper plate assembly (2) to move up and down along the sliding rod (9); the upper plate assembly (2) is positioned between the upper fixed plate (5) and the lower plate assembly (3), and an air passage which presses the inner cavity of the valve body of the two-position three-way electromagnetic valve (35) is arranged in the upper plate assembly (2) so as to detect the tightness of the inner cavity of the two-position three-way electromagnetic valve (35);
the roller assembly (1) rolls upwards or downwards along the guide rod (8);
the roller assembly (1) comprises: a roller (27), a roller shaft (28) and a roller seat (29); the roller (27) is dumbbell-shaped, the middle part of the roller is a semicircular annular groove, and the roller (27) is axially provided with a through hole; the roller shaft (28) is a stepped shaft with thick middle and thin two ends; the roller seat (29) is a cuboid, one side of the roller seat in the width direction is provided with two counter bores, and the center of each counter bore is provided with a threaded through hole communicated with the other side; the two rollers (27) are respectively arranged between the two roller seats (29) in parallel through roller shafts (28), each roller (27) is in rotary fit with the roller shaft (28), and the roller seats (29) are arranged in corresponding mounting holes on the upper fixed plate (5);
the lower plate assembly (3) comprises: a lower valve plate (23) and a positioning shaft (24);
the accessory end post assembly (36) includes: an end seat (30), a sealing joint (31) and a rubber tube (34);
the upper plate assembly (2) comprises: the device comprises an upper valve plate (13), a sealing end seal assembly (14), an inflation shaft (15), a large spring (16), a guide sleeve (17) and a small spring (18).
2. The pneumatic mechanism for detecting the air tightness of the two-position three-way electromagnetic valve according to claim 1, wherein the lower valve plate (23) is a rectangular plate, through holes axially along the thickness direction are formed in the middle part and at the two sides in the length direction, the through holes in the middle part are used as lightening holes, and the through holes at the two sides in the length direction are used for installing sliding rods (9); one end face of the lower valve plate (23) in the thickness direction is provided with more than one pair of counter bores, the center of each counter bore is a through hole penetrating through the thickness direction, and two sides of the central through hole of each counter bore are respectively provided with a threaded hole for installing a positioning shaft (24); one end of the positioning shaft (24) is a disc, the other end of the positioning shaft is a circular shaft, two through holes are formed in the disc end, the disc ends of more than one pair of positioning shafts (24) are correspondingly arranged in counter bores on the lower valve plate (23), and the positioning shafts (24) are matched with mounting holes at the bottom of the two-position three-way electromagnetic valve (35) and are used for positioning the two-position three-way electromagnetic valve (35);
the inside of the lower valve plate (23) is provided with a through hole along the length direction, one side of the width direction is provided with more than one blind hole along the width direction, the through hole and the blind holes form a communicated air passage, both ends of the through hole and the outer ends of the more than one blind hole are provided with internal threads, and five plugs II (25) are respectively arranged at the more than one blind hole of the lower valve plate (23) and one end of the through hole and used for blocking the air passage in the lower valve plate (23); the pipe joint II (26) is arranged at the other end of the through hole of the lower valve plate (23) and is used as an air source interface for pressurizing the bottom center position of the two-position three-way electromagnetic valve (35) during test so as to detect the tightness of the valve core sealing part of the two-position three-way electromagnetic valve (35).
3. The pneumatic mechanism for detecting the air tightness of the two-position three-way electromagnetic valve according to claim 1, wherein the end seat (30) is a stepped cylinder, an annular groove is arranged on the stepped surface of the stepped cylinder, and an O-shaped ring II (32) is arranged in the annular groove; a plane is arranged on the outer circumferential surface of the large end of the end seat (30), a blind hole is arranged along the radial direction of the end seat (30) at the plane, and the blind hole is communicated with a through hole arranged in the center of the small end of the end seat (30); the sealing joint (31) is a round shaft with a cylindrical shaft shoulder in the middle, and a through hole is arranged in the center of the round shaft; one end of the sealing joint (31) is provided with an external thread, the end surface of the sealing joint is provided with an annular groove, and two planes are arranged on the opposite side of the outer circumferential surface of one end of the cylindrical shaft shoulder corresponding to the other end of the sealing joint (31); one end of the sealing joint (31) provided with external threads is sleeved with an O-shaped ring III (33) and is arranged in a blind hole on the side face of the end seat (30), the other end of the sealing joint (31) is provided with a rubber tube (34), when the bottom of the two-position three-way electromagnetic valve (35) is pressed to detect the sealing property of the valve core, one end of the end seat (30) provided with an annular groove is arranged at the top of the two-position three-way electromagnetic valve (35), and the piston rod of the main cylinder (6) moves downwards to push the upper plate assembly (2) to move downwards, so that the end seat (30) and the two-position three-way electromagnetic valve (35) are pressed tightly, whether the rubber tube (34) put into water has bubbles or not is observed, and the sealing property of the valve core sealing part of the two-position three-way electromagnetic valve (35) is detected.
4. Pneumatic mechanism for the tightness detection of two-position three-way solenoid valves according to claim 1, characterised in that said upper fixed plate (5) is parallel to the lower fixed plate (4).
5. Pneumatic mechanism for the tightness detection of two-position three-way solenoid valves according to claim 4, characterised in that said lower plate assembly (3) is parallel to the upper fixed plate (5) and to the lower fixed plate (4).
6. Pneumatic mechanism for the tightness detection of two-position three-way solenoid valves according to claim 5, characterised in that said upper plate assembly (2) is parallel to the upper fixed plate (5) and to the lower plate assembly (3).
7. The pneumatic mechanism for air tightness detection of a two-position three-way solenoid valve according to any one of claims 1 to 6, further comprising: the connecting plate (10), the push plate (11) and the shaft pin (12); a push plate (11) is arranged at the end part of a piston rod of the main cylinder (6), the push plate (11) is connected with a connecting plate (10) through a shaft pin (12), the connecting plate (10) is fixed on the upper plate assembly (2), and the piston rod of the main cylinder (6) is fixed on the upper plate assembly (2).
8. The pneumatic mechanism for detecting the air tightness of the two-position three-way electromagnetic valve according to claim 7, wherein,
the upper valve plate (13) is a rectangular plate, a middle threaded hole is formed in the middle of the upper valve plate (13) and is used for being connected with a piston rod of the main cylinder (6), more than two through holes are formed in the periphery of the middle threaded hole and are used for installing the push plate (11), two step holes and a through hole are respectively formed in two sides of the upper valve plate (13) in the length direction, threaded holes are formed in each step hole in two sides of the upper valve plate (13) in the length direction and are used for installing the sealing assembly (14), and each through hole is used for fixing the guide sleeve (17); the sealing end sealing assemblies (14) are cylinders provided with three end face through holes, annular grooves are formed in the middle end face through holes, O-shaped rings IV are arranged in the annular grooves, more than one pair of sealing end sealing assemblies (14) are respectively and correspondingly arranged at two sides of the upper valve plate (13) in the thickness direction, and the end face through holes at the two sides of the sealing end sealing assemblies (14) are used for connecting and reinforcing with the upper valve plate (13);
the inflatable shaft (15) is a step shaft, three step surfaces formed by four sections of cylinders are close to one end, the outer diameters of the first three sections of cylinders are sequentially increased from the end, and the outer diameter of the fourth section of cylinders is smaller than the outer diameters of the middle two sections of cylinders, so that the step shaft can be divided into a short step shaft and a long step shaft; a central blind hole is formed in one end of the short step shaft, the bottom of the central blind hole is communicated with a radial through hole of the long step shaft, a threaded blind hole is formed in the end part of the long step shaft, the end of each inflation shaft (15) penetrates through the middle end surface through holes of two sealing end seal assemblies (14) in the same step hole, the end parts of the central blind hole are fastened through fixing screws (19), and radial through holes formed in the long step shafts of more than one inflation shaft (15) are communicated through air passage holes formed in the upper valve plate (13); the large spring (16) and the small spring (18) are sleeved on the outer circumference of the long step shaft of the inflation shaft (15), and two ends of the large spring are respectively abutted against the step surfaces of the sealing end seal assembly (14) and the long step shaft; an O-shaped ring I (22) is arranged at the step position of the end of the short step shaft of the inflation shaft (15); the plug I (20) is arranged on one side of the upper valve plate (13) in the length direction and is used for blocking an air passage in the upper valve plate (13); the pipe joint I (21) is arranged on the other side of the length direction of the upper valve plate (13) and is an air source interface for pressing the air inflation shaft (15) from the top end of the two-position three-way electromagnetic valve (35) to the cavity of the air inflation shaft during test so as to detect the inner cavity tightness of the two-position three-way electromagnetic valve (35).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669268.4A CN113532756B (en) | 2021-06-17 | 2021-06-17 | Pneumatic mechanism for detecting air tightness of two-position three-way electromagnetic valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669268.4A CN113532756B (en) | 2021-06-17 | 2021-06-17 | Pneumatic mechanism for detecting air tightness of two-position three-way electromagnetic valve |
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| CN113532756B true CN113532756B (en) | 2023-10-03 |
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