CN113532756A - 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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- CN113532756A CN113532756A CN202110669268.4A CN202110669268A CN113532756A CN 113532756 A CN113532756 A CN 113532756A CN 202110669268 A CN202110669268 A CN 202110669268A CN 113532756 A CN113532756 A CN 113532756A
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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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Abstract
The invention discloses a pneumatic mechanism for detecting the air tightness of a two-position three-way electromagnetic valve, which comprises: the main cylinder, the auxiliary cylinder and the guide rod; the auxiliary cylinder is arranged on the lower fixing plate, and the end part of a piston rod of the auxiliary cylinder is supported with an upper fixing plate; one end of the guide rod is fixed on the lower fixing plate, and the other end of the guide rod is supported in the mounting hole of the upper fixing plate through the roller assembly; a piston rod of the auxiliary cylinder can drive the upper fixing plate to move up or down 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 fixing plate and the lower fixing plate, and an air passage for pressurizing a 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 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; a 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 positioned between the upper fixing 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, most of vehicle tire central inflation and deflation systems adopt pneumatic and control technologies to realize inflation, deflation and pressure measurement functions of wheeled vehicle tires and meet the requirements of wheeled vehicle roads, sand, muddy roads and the like on tire pressure. The two-position three-way electromagnetic valve is used as a pneumatic control element for a gas circuit control element of a central inflation and deflation system of a tire, is a direct-acting two-position three-way electromagnetic valve, requires high air tightness in use, and needs to be subjected to an air tightness detection test in order to meet the use requirement of a product. At present, the defects of high working strength, low efficiency, corrosion to the electromagnetic valve and the like exist in the air tightness detection of the electromagnetic valve, and a leakage test solution is smeared in the test; in addition, the gas tightness leak detector is adopted, the structure is complex, the cost is high, and the gas microleakage 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, the directional movement 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 cavity and a valve core of the two-position three-way electromagnetic valve, and ensures that a product meets the use requirements.
The technical scheme of the invention is as follows: a pneumatic mechanism for detecting air tightness of a two-position three-way electromagnetic valve comprises: the main cylinder, the auxiliary cylinder and the guide rod; the auxiliary cylinder is arranged on the lower fixing plate, and the end part of a piston rod of the auxiliary cylinder is supported with an upper fixing plate; one end of the guide rod is fixed on the lower fixing plate, and the other end of the guide rod is supported in the mounting hole of the upper fixing plate through the roller assembly; a piston rod of the auxiliary cylinder can drive the upper fixing plate to move up or down 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 fixing plate and the lower fixing plate, an air passage for pressurizing a valve core of the two-position three-way electromagnetic valve is arranged in the lower plate assembly, an accessory end column 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 column assembly to detect the sealing performance 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; a 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 located between the upper fixing plate and the lower plate assembly, and an air passage for pressing 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 performs an upward or downward rolling movement 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 a through hole is axially formed in the roller; the roller shaft is a step shaft with a thick middle part and thin two ends; the roller seat is a cuboid, two counter bores are arranged on one side of the roller seat in the width direction, and a threaded through hole communicated with the other side is formed in the center of each counter bore; the two rollers are respectively arranged between the two roller seats in parallel through 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 comprises: a lower valve plate and a positioning shaft; the lower valve plate is a rectangular plate, through holes are axially formed in the middle of the lower valve plate and in the thickness direction of the lower valve plate, the through holes in the middle serve as lightening holes, and the through holes in the two sides of the lower valve plate in the length direction are used for installing sliding rods; more than one pair of counter bores are arranged on the end face of one end of the lower valve plate in the thickness direction, the center of each counter bore is a through hole penetrating in the thickness direction, and two threaded holes are formed in two sides of the central through hole of each counter bore and used for mounting 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 ends, the disc ends of more than one pair of positioning shafts are correspondingly installed in counter bores in the lower valve plate, and the positioning shafts are matched with installation holes in the bottom of the two-position three-way electromagnetic valve and used for positioning the two-position three-way electromagnetic valve;
the lower valve plate is internally 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, internal threads are arranged at two ends of the through hole and the outer end of the more than one blind holes, and five plugs II are respectively arranged at the more than one blind holes of the lower valve plate and one end of the through hole and used for plugging the air passage in the lower valve plate; and 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 central position of the bottom of the two-position three-way electromagnetic valve during testing so as to detect the sealing property of the valve core sealing part of the two-position three-way electromagnetic valve.
Preferably, the accessory end post assembly comprises: an end seat, a sealing joint and a rubber pipe; the end seat is a step cylinder, the step surface of the end seat is provided with an annular groove, and an O-shaped ring II is arranged in the annular groove; the outer circumference of the large end of the end seat is provided with a plane, the plane is provided with a blind hole 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 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; the end, provided with the external thread, of the sealing joint is sleeved with an O-shaped ring III and is installed in a blind hole in the side face of the end seat, a rubber pipe is installed at the other end of the sealing joint, when the bottom of the two-position three-way electromagnetic valve is pressed to detect the sealing performance of the valve core, one end, provided with the annular groove, of the end seat is installed at the top of the two-position three-way electromagnetic valve, 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 compressed, the air source interface of the lower plate assembly is pressed, whether the rubber pipe placed in water has bubbles or not is observed, and the sealing performance of the sealing position of the valve core 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 fixing plates.
Preferably, the upper plate assembly is parallel to the upper fixing plate and the lower plate assembly.
Preferably, the method further comprises the following steps: the connecting plate, the push plate and the shaft pin; the end part of a piston rod of the master cylinder is provided with a push plate, the push plate is connected with a connecting plate through a shaft pin, the connecting plate is fixed on the upper plate assembly, and the piston rod of the master cylinder is fixed on the upper plate assembly.
Preferably, the upper plate assembly includes: the upper valve plate, the sealing end seal assembly, the inflation shaft, the large spring, the guide sleeve and the 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 the main cylinder, more than two through holes are formed in the periphery of the middle threaded hole and used for mounting the push plate, two sides of the upper valve plate in the length direction are respectively provided with two step holes and one through hole, threaded holes are formed in two sides of each step hole in the length direction of the upper valve plate and used for mounting the sealing end seal assembly, and each through hole is used for fixing the guide sleeve; the sealing end seal assembly is a cylinder provided with three end face through holes, an annular groove is arranged 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 seal 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 seal assemblies are used for being connected and reinforced with the upper valve plate;
the inflatable shaft is a stepped shaft, three stepped surfaces formed by four sections of cylinders are close to one end, the outer diameters of the front three sections of cylinders are sequentially increased from the end, and the outer diameter of the fourth section of cylinder is smaller than that of the middle two sections of cylinders, so that the stepped shaft can be divided into a short stepped shaft and a long stepped shaft; a central blind hole is formed at 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 at the end part of the long step shaft, the end of the long step shaft of each inflation shaft penetrates through holes in the middle end faces of two sealing end seal assemblies in the same step hole, the end parts of the long step shafts 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 short step shaft of the inflating shaft; the plug I is arranged on one side of the upper valve plate in the length direction and used for plugging 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 pressurizing an air 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 testing so as to detect the tightness of the inner cavity of the two-position three-way electromagnetic valve.
Has the advantages that:
1. according to the pneumatic mechanism provided by the invention, when the inner cavity of the two-position three-way electromagnetic valve is subjected to a pressure test, the piston rod of the main air 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 air 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 subjected to pressure test from the upper plate assembly to the inner cavity of the valve body of the two-position three-way electromagnetic valve, whether the two-position three-way electromagnetic valve leaks or not is observed, and the tightness of the inner cavity of the two-position three-way electromagnetic valve can be detected; when a two-position three-way electromagnetic valve core sealing test is carried out, the accessory end column assembly is placed at an air port at the top end of the two-position three-way electromagnetic valve, a piston rod of the main cylinder moves downwards, so that the upper plate assembly moves downwards along the sliding rod, the upper plate assembly compresses the end face of the accessory end column assembly, and the two-position three-way electromagnetic valve is compressed and fixed on the lower plate assembly; pressurizing gas is introduced from a pressurizing gas source interface of the lower plate assembly, whether bubbles leak out from a rubber tube of the accessory end post assembly placed in the water tank or not is observed, and the tightness of the valve core of the two-position three-way electromagnetic valve can be detected; the two-position three-way electromagnetic valve is electrified to work, whether bubbles seep out from the rubber tube placed in the water tank 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 horizontal rotation of the upper fixing plate can be limited.
3. The roller assembly in the pneumatic mechanism can ensure that the upper fixing plate slides up and down along the guide rod, so that the friction force during directional movement is reduced, and the upper fixing plate can be effectively limited to rotate in the horizontal plane; meanwhile, when the rolling structure is adopted to reduce the up-down movement of the auxiliary cylinder of the pneumatic mechanism of the two-position three-way electromagnetic valve airtightness detection test, the friction force of the guide rod is compressed and fixed by the movement control of the main cylinder and the piston rod of the auxiliary cylinder, the two-position three-way electromagnetic valve is pressed and fixed by the upper plate assembly and the lower plate assembly, the sealing performance of the cavity and the valve core of the two-position three-way electromagnetic valve is detected by the pressing and bottom pressing test of the upper plate assembly and the lower plate assembly in the cavity of the valve body of the two-position three-way electromagnetic valve, the airtightness detection of the two-position three-way electromagnetic valve is ensured by the pneumatic action mechanism of the two-position three-way electromagnetic valve airtightness detection test, the detection efficiency is improved, and the pneumatic mechanism has the characteristics of simple structure and convenience in use.
4. The lower plate assembly positions the position of the two-position three-way electromagnetic valve by adopting a positioning shaft and provides an air pressure channel for detecting the sealing property of a valve core 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 tightly pressed, the tightness of the two-position three-way electromagnetic valves is guaranteed to be detected simultaneously, and an air pressure channel for the tightness detection of the cavities of the two-position three-way electromagnetic valves is provided.
5. The specific design of the accessory end post assembly can accurately assist the two-position three-way electromagnetic valve to carry out a 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 is arranged in parallel with the upper fixing plate and the lower fixing plate, 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 action.
8. The upper plate assembly is parallel to the upper fixing plate and the lower plate assembly, so that the upper plate assembly can be effectively ensured to smoothly slide up and down 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 specific arrangement of the connecting plate, the push plate and the shaft pin can effectively ensure that the piston rod of the main cylinder and the upper plate assembly are stably connected into a whole.
10. The upper plate assembly is specifically arranged to be matched with the main cylinder and the lower plate assembly to realize the compression and fixation of the two-position three-way electromagnetic valve, and can also be used for pressurizing gas into a valve body cavity of the two-position three-way electromagnetic valve through a pressurizing gas source interface on the upper plate assembly, and the tightness of the inner cavity of the two-position three-way electromagnetic valve is detected by observing whether the two-position three-way electromagnetic valve leaks 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 structural diagram of the upper plate assembly of the present invention.
FIG. 3 is a schematic structural diagram of a lower plate assembly according to the present invention.
FIG. 4 is a schematic view of the roller assembly according to the present invention.
FIG. 5 is a schematic view of the construction of the accessory end post assembly of the present invention.
Fig. 6 is a schematic diagram of a two-position three-way solenoid valve, an appearance 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 valve plate in the present invention.
Fig. 8 is a three-dimensional view of the guide sleeve of the present invention.
FIG. 9 is a schematic view, front view, cross-sectional view of a seal end seal assembly of the present invention.
FIG. 10 is a schematic, three-dimensional and sectional view of the inflation shaft of the present invention.
FIG. 11 is a schematic view, a three-dimensional view and a front view of the structure of the lower valve plate of the present invention.
FIG. 12 is a three-dimensional view of a positioning shaft of the present invention.
Fig. 13 is a three-dimensional view of the roller of the present invention.
Figure 14 is a three dimensional view of a roller axle according to the present invention.
Figure 15 is a three dimensional view of the roller mount of the present invention.
Fig. 16 is a schematic, three-dimensional and sectional view of an end seat according to the present invention.
Figure 17 is a three-dimensional view of a sealing joint of the present invention.
FIG. 18 is a structural diagram of the inner cavity of the two-position three-way solenoid valve of the present invention.
FIG. 19 is a structural diagram of the valve core sealing and pressing of the two-position three-way solenoid valve of the present invention.
Wherein, 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 master cylinder; 7. an auxiliary cylinder; 8. a guide bar; 9. a slide bar; 10. a connecting plate; 11. pushing the plate; 12. a shaft pin; 13. an upper valve plate; 14. sealing the end seal assembly; 15. an inflation shaft; 16. a large spring; 17. a guide sleeve; 18. a small spring; 19. a set screw; 20. a plug I; 21. a pipe joint I; 22. an O-shaped ring I; 23. a lower valve plate; 24. positioning the 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. an O-shaped ring II; 33. an O-shaped ring III; 34. a hose; 35. a two-position three-way electromagnetic valve; 36. an accessory end post assembly.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a pneumatic mechanism that two-position three way solenoid valve gas tightness detected, through the control to the cylinder removal, realizes carrying out the fixed clamp to two-position three way solenoid valve, directional movement and aerifing to two-position three way solenoid valve and suppress, detects the gas tightness performance of its two-position three way solenoid valve cavity, case, guarantees that the product satisfies the operation 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 fixing plate 4, an upper fixing 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 fixing plate 4, the piston rod end of the auxiliary cylinder 7 is fixedly provided with an upper fixing plate 5, and the upper fixing plate 5 is parallel to the lower fixing plate 4; one end of the guide rod 8 is fixedly arranged on the lower fixing plate 4, and the other end of the guide rod is supported in a mounting hole on the upper fixing plate 5 through the roller assembly 1; when the auxiliary cylinder 7 acts, the piston rod end of the auxiliary cylinder drives the upper fixing plate 5 to move up or down along the guide rod 8; wherein, the roller assembly 1 mounted on the upper fixing plate 5 rolls upwards or downwards along the guide rod 8, and the roller assembly 1 and the auxiliary cylinder 7 limit the horizontal rotation of the upper fixing plate 5;
the two sliding rods 9 are arranged in parallel, one end of each sliding rod is fixed to two opposite sides of the upper fixing plate 5, and the other end of each sliding rod is fixed to two opposite sides of the lower plate assembly 3; wherein, the lower plate assembly 3 is parallel and positioned 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 fixing plate 5, the piston rod end of the main cylinder is provided with a push plate 11, 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 of the two-position three-way electromagnetic valve is arranged on the lower plate assembly 3, and a bottom normally closed port is communicated with an air passage in the lower plate assembly 3; a 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 positioned between the upper fixing plate 5 and the lower plate assembly 3.
In this embodiment, as shown in fig. 2, the upper plate assembly 2 includes: 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, a small spring 18, a fixing screw 19, a plug I20, a pipe joint I21 and an 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 mounting the push plate 11, two sides of the upper valve plate 13 in the length direction are respectively provided with two step holes, each step hole is provided with a threaded hole along two sides of the upper valve plate 13 in the length direction and used for mounting the sealing end seal assembly 14, and through holes with the axial direction consistent with the thickness direction are formed in 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 at both sides of the upper valve plate 13 in an interference fit manner; as shown in fig. 9, the sealing end seal assembly 14 is a cylinder with three end face through holes, an annular groove is arranged in the middle end face through hole, an O-ring iv is arranged in the annular groove, eight sealing end seal assemblies 14 are respectively and correspondingly arranged on two sides of the thickness direction of the upper valve plate 13, and the end face through holes on two sides of the sealing end seal assemblies 14 are used for being connected and reinforced with the upper valve plate 13 by screws; 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 close to one end, from which the outer diameters of the first three sections of cylinders are sequentially increased, and the outer diameter of the fourth section of cylinder is smaller than that of the middle two sections of cylinders, so that the stepped shaft can be divided into two sections, namely a short stepped shaft and a long stepped shaft; one end of the short stepped 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 stepped shaft, the end part of the long stepped shaft is provided with a threaded blind hole, the end of the long stepped shaft of each inflation shaft 15 passes through the through holes at the middle end surfaces of two sealing end seal assemblies 14 in the same stepped hole, the end parts of the long stepped shafts are fastened through fixing screws 19, and the radial through holes arranged on the long stepped 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 and the small spring respectively abut against the step surfaces of the sealing end seal assembly 14 and the long step shaft; an O-shaped ring I22 is arranged at the step of the short step shaft of the inflating shaft 15; the plug I20 is arranged on one side of the upper valve plate 13 in the length direction and used for plugging 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 pressurizing the air inflation shaft 15 from the top end of the two-position three-way electromagnetic valve 35 to the cavity of the two-position three-way electromagnetic valve in test so as to 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, through holes are axially formed in the middle and on both sides in the length direction, the through holes in the middle serve as lightening holes, and the through holes on both sides in the length direction are used for installing the sliding rods 9; eight counter bores are arranged on one end face of the lower valve plate 23 in the thickness direction, the center of each counter bore is a through hole penetrating in the thickness direction, and two threaded holes are formed in two sides of the central through hole of each counter bore and used for mounting a positioning shaft 24; as shown in fig. 12, one end of the positioning shaft 24 is a circular disc, the other end of the positioning shaft is a circular shaft, two through holes are formed in the circular disc, the circular disc ends of the eight positioning shafts 24 are correspondingly installed in the eight counter bores in the lower valve plate 23 and are fastened and fixed by screws, and the positioning shaft 24 is matched with an installation hole in the bottom of the two-position three-way electromagnetic valve 35 and used for positioning the two-position three-way electromagnetic valve 35; a through hole is formed in the lower valve plate 23 along the length direction, four blind holes are formed in one side of the width direction, the through hole and the blind holes form a communicated air passage, internal threads are formed at two ends of the through hole and at the outer ends of the four blind holes, and five plugs II 25 are respectively arranged at the four blind holes of the lower valve plate 23 and one end of the through hole and used for plugging 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 central position of the bottom of the two-position three-way electromagnetic valve 35 during testing so as to detect the sealing performance 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 base 29; as shown in fig. 13, the roller 27 is dumbbell-shaped, and the middle part thereof is a semicircular annular groove, and the roller 27 is axially provided with a through hole; as shown in fig. 14, the roller shaft 28 is a stepped shaft having a thick middle and thin ends; as shown in fig. 15, the roller seat 29 is a rectangular parallelepiped, and two counter bores are provided at one side in the width direction, and a threaded through hole communicated with the other side is provided at the center of each counter bore; the two rollers 27 are respectively installed between two roller seats 29 in parallel through roller shafts 28, each roller 27 can rotate on the corresponding roller shaft 28, the roller seats 29 can be installed in the corresponding installation holes on the upper fixing plate 5 through screws, when the piston rod of the auxiliary cylinder 7 drives the upper fixing plate 5 to move up and down, the roller assembly 1 plays a role in directional rolling movement on the upper fixing plate 5, and the friction force during the directional movement can be reduced by adopting the roller assembly 1.
In this embodiment, as shown in fig. 5, when the valve core of the two-position three-way electromagnetic valve 35 is subjected to a sealing test, 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, and an annular groove is formed on the stepped surface of the end seat, and an O-ring ii 32 is installed 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 on the plane 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 shoulder at the middle, and a through hole is formed at the center; 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; an O-shaped ring III 33 is sleeved at one end of a sealing joint 31 with external threads and is installed in a blind hole in the side face of an end seat 30, a rubber pipe 34 is installed at the other end of the sealing joint 31, when the bottom of a two-position three-way electromagnetic valve 35 is pressed to detect the sealing performance of a valve core, one end of the end seat 30 with an annular groove is installed at the top of the two-position three-way electromagnetic valve 35, a piston rod of a main air cylinder 6 moves downwards to push an upper plate assembly 2 to move downwards, so that the end seat 30 and the two-position three-way electromagnetic valve 35 are pressed, the air source interface of the lower plate assembly 3 is pressed, whether bubbles exist in the rubber pipe 34 placed in water 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: during the pressure test of the inner cavity of the two-position three-way electromagnetic valve 35, as shown in fig. 18, the mounting hole at the bottom of the two-position three-way electromagnetic valve 35 is in shaft fit with the hole 24 of the positioning shaft on the lower plate assembly 3, the piston rod of the main cylinder 6 moves downwards, the push plate 11 at the end of the piston rod pushes the connecting plate 10 connected with the shaft pin 12 to enable the upper plate assembly 2 to move downwards along the sliding rod 9, the inflating shaft 15 on the upper plate assembly 2 is inserted into the top end air port of the two-position three-way electromagnetic valve 35, the O-shaped ring i 22 on the inflating shaft 15 seals the top end air port of the two-position three-way electromagnetic valve 35, and as the piston rod of the main cylinder 6 moves downwards continuously, the large spring and the small spring on the lower plate assembly 3 are compressed and fixed on the lower plate assembly 3; the piston rod of the auxiliary cylinder 7 moves downwards, all parts on the upper fixing plate 5 connected with the piston rod move downwards along with the piston rod, the roller assembly 1 on the upper fixing plate 5 rolls downwards along the guide rod 8, the two-position three-way electromagnetic valve 35 on the lower plate assembly 3 falls into a water tank filled with water, a pressurizing gas is introduced from a pressurizing gas source interface on the upper plate assembly 2, the pressurizing gas is pressurized from the inflating shaft 15 of the upper plate assembly 2 to the valve body cavity of the two-position three-way electromagnetic valve 35, and whether the two-position three-way electromagnetic valve 35 leaks gas or not is observed, so that the tightness of the inner cavity of the two-position three-way electromagnetic valve 35 is detected;
during the valve core sealing test of the two-position three-way electromagnetic valve 35, as shown in fig. 19, the accessory end post assembly 36 is placed at the air port at the top end 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 inflating shaft 15 on the upper plate assembly 2 compresses the end surface of the accessory end post assembly 36, and the large spring and the small spring on the lower plate assembly 3 are compressed and stressed, so that the two-position three-way electromagnetic valve 35 is compressed and fixed on the lower plate assembly 3; pressurizing gas is introduced from a pressurizing gas source interface of the lower plate assembly 3, whether bubbles leak out from a rubber tube 34 of an accessory end post assembly 36 placed in the water tank is observed, and the tightness of a valve core of a two-position three-way electromagnetic valve 35 can be detected; the two-position three-way solenoid valve 35 is electrified to work, whether bubbles seep out from the rubber tube 34 placed in the water tank is observed, and the tightness of the upper port of the two-position three-way solenoid valve 35 can be detected when the two-position three-way solenoid valve 35 works.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
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 fixing plate (4), and the end part of a piston rod of the auxiliary cylinder is supported with an upper fixing plate (5); one end of a guide rod (8) is fixed on the lower fixing plate (4), and the other end of the guide rod is supported in a mounting hole of the upper fixing plate (5) through a roller assembly (1); a piston rod of the auxiliary cylinder (7) can drive the upper fixing plate (5) to move up or down along the guide rod (8);
two sliding rods (9) arranged at opposite sides are fixed between the upper fixing plate (5) and the lower plate assembly (3); the lower plate assembly (3) is located between the upper fixing plate (5) and the lower fixing plate (4), an air passage for pressing a valve core of the two-position three-way electromagnetic valve (35) is arranged in the lower plate assembly (3), an accessory end column 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 column assembly (36) to detect the sealing performance of the valve core of the two-position three-way electromagnetic valve (35);
the main cylinder (6) is fixed on the upper fixing plate (5), a piston rod of the main 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); a 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 located between the upper fixing plate (5) and the lower plate assembly (3), and an air passage for pressurizing the inner cavity of the valve body of the two-position three-way electromagnetic valve (35) is arranged inside the upper plate assembly (2) so as to detect the tightness of the inner cavity of the two-position three-way electromagnetic valve (35).
2. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 1, characterized in that said roller assembly (1) performs an upward or downward rolling movement along the guide rod (8).
3. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 2, wherein said 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 a through hole is axially formed in the roller (27); the roller shaft (28) is a step shaft with thick middle and thin two ends; the roller seat (29) is a cuboid, two counter bores are arranged on one side of the roller seat in the width direction, and a threaded through hole communicated with the other side is formed in the center of each counter bore; the two rollers (27) are respectively arranged between two roller seats (29) in parallel through roller shafts (28), each roller (27) is in running fit with the roller shaft (28), and the roller seats (29) are arranged in corresponding mounting holes on the upper fixing plate (5).
4. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 1, characterized in that said lower plate assembly (3) comprises: a lower valve plate (23) and a positioning shaft (24); the lower valve plate (23) is a rectangular plate, through holes are axially formed in the middle of the lower valve plate and on two sides of the lower valve plate in the length direction along the thickness direction, the through holes in the middle serve as lightening holes, and the through holes on the two sides of the lower valve plate in the length direction are used for installing sliding rods (9); more than one pair of counter bores are arranged on 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 in the thickness direction, and two threaded holes are respectively arranged on two sides of the central through hole of each counter bore and used for mounting 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 installed in counter bores in the lower valve plate (23), and the positioning shaft (24) is matched with an installation hole in the bottom of the two-position three-way electromagnetic valve (35) and used for positioning the two-position three-way electromagnetic valve (35);
the inner part 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, the two ends of the through hole and the outer end 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 holes of the lower valve plate (23) and one end of the through hole and used for plugging the air passage in the lower valve plate (23); and 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 central position of the bottom of the two-position three-way electromagnetic valve (35) during testing so as to detect the sealing property of the valve core sealing part of the two-position three-way electromagnetic valve (35).
5. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 1, wherein said accessory end-post assembly (36) comprises: an end seat (30), a sealing joint (31) and a rubber pipe (34); the end seat (30) is a step cylinder, the step surface of the end seat is provided with an annular groove, 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 on the plane 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); the sealing joint (31) is a round shaft with a cylindrical shaft shoulder in the middle, and a through hole is formed in the center of the sealing joint; 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 an external thread is sleeved with an O-shaped ring III (33) and is installed in a blind hole in the side face of the end seat (30), a rubber pipe (34) is installed at the other end of the sealing joint (31), when the sealing performance of the valve core is detected by pressurizing 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 installed at the top of the two-position three-way electromagnetic valve (35), a 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 compressed, the air source interface of the lower plate assembly (3) is pressurized, whether the rubber pipe (34) placed in water has bubbles is observed, and the sealing performance of the valve core sealing part of the two-position three-way electromagnetic valve (35) is detected.
6. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 1, characterized in that said upper fixed plate (5) is parallel to said lower fixed plate (4).
7. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 6, characterized in that said lower plate assembly (3) is parallel to the upper fixed plate (5) and the lower fixed plate (4).
8. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 7, characterized in that said upper plate assembly (2) is parallel to the upper fixed plate (5) and the lower plate assembly (3).
9. The pneumatic mechanism for the airtightness detection of the two-position three-way electromagnetic valve according to any one of claims 1 to 8, further comprising: a connecting plate (10), a push plate (11) and a shaft pin (12); the end part of a piston rod of the main cylinder (6) is provided with a push plate (11), 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).
10. The pneumatic mechanism for the airtight testing of a two-position three-way solenoid valve according to claim 9, wherein said 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);
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 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 used for mounting the push plate (11), two stepped holes and one through hole are formed in two sides of the upper valve plate (13) in the length direction respectively, threaded holes are formed in two sides of each stepped hole in the length direction of the upper valve plate (13) and used for mounting a sealing end seal assembly (14), and each through hole is used for fixing a guide sleeve (17); the sealing end seal 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 seal assemblies (14) are correspondingly arranged on two sides of the thickness direction of the upper valve plate (13) respectively, and the end face through holes on the two sides of the sealing end seal assemblies (14) are used for being connected and reinforced with the upper valve plate (13);
the inflation 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 front three sections of cylinders are sequentially increased from the end, and the outer diameter of the fourth section of cylinder is smaller than that 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 (15) passes through the through hole at the middle end surface of two sealing end seal assemblies (14) in the same step hole, the end part of the long step shaft is fastened through a fixing screw (19), and the radial through holes arranged on the long step shafts of more than one inflation shaft (15) are communicated through an air passage hole 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 inflating shaft (15), and two ends of the large spring and the small spring respectively abut against the sealing end seal assembly (14) and the step surface of the long step shaft; an O-shaped ring I (22) is arranged at the step of the short step shaft of the inflating shaft (15); the plug I (20) is arranged on one side of the upper valve plate (13) in the length direction and used for plugging 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 pressurizing the air inflation shaft (15) into the cavity of the two-position three-way electromagnetic valve (35) from the top end of the two-position three-way electromagnetic valve in a test so as to detect the tightness of the inner cavity of the two-position three-way electromagnetic valve (35).
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| Application Number | Priority Date | Filing Date | Title |
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| 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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|---|---|---|---|
| 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 CN113532756B (en) | 2023-10-03 |
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