CN216247057U - Air tightness verifying device for experimental equipment - Google Patents

Abstract

The utility model relates to the technical field of experimental inspection, in particular to a gas tightness inspection device for experimental equipment, which is used for inspecting the tightness of a whole set of experimental equipment, determining the leakage position and having good inspection effect; the testing device comprises a base plate, four travelers, the equipment tray, the inspection cell, a plurality of sealing members and heater, the traveller is all installed to four angle departments of the up end of bottom plate, equipment tray slidable mounting is at the middle part of four travelers, set up a plurality of fixture and slide rail mechanism on the equipment tray, inspection cell slidable mounting is on the upper portion of four travelers, the inside in inspection cell is provided with the inspection cavity, the up end in inspection cell is provided with gets and puts the mouth, get and put mouth and inspection cavity intercommunication, inspection cell bottom is provided with a plurality of through-holes, a plurality of through-holes are located the fixture's of a plurality of equipment trays top respectively, the size of through-hole matches with the bottleneck of experimental device, all install the sealing member on the through-hole, heater movable mounting is on the up end of bottom plate, the heater is located equipment tray fixture's below.

Description

Air tightness verifying device for experimental equipment

Technical Field

The utility model relates to the technical field of experimental inspection, in particular to a gas tightness inspection device for experimental equipment.

Background

When carrying out the experiment, in order to obtain objective accurate experimental result as far as possible, need carry out a series of inspections to experimental apparatus, wherein the gas tightness inspection of experimental apparatus is more common inspection project, generally stretch into aquatic with the oral area and the sealing member of experimental apparatus and connection glass pipe etc. down during the inspection, the mode of using the heating makes the inside intensification of experimental apparatus step up, observe again that the experimental apparatus junction has or not the bubble, but when simple heated air can not reach the experiment, the inside pressure of experimental apparatus, some small bubbles can be attached to when experimental apparatus immerses in the aquatic, cause the interference, the naked eye is difficult to observe when having small leakage, lead to examining the poor effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the air tightness testing device for the experimental equipment, which is used for testing the tightness of the whole set of experimental equipment, determining the leakage position and having good testing effect.

The utility model relates to an air tightness checking device for experimental equipment, which comprises a bottom plate, four sliding columns and an equipment tray, the device comprises a detection pool, a plurality of sealing elements and heaters, sliding columns are arranged at four corners of the upper end surface of a bottom plate, a device tray is slidably arranged in the middle of the four sliding columns, a plurality of clamping mechanisms and sliding rail mechanisms are arranged on the device tray, the detection pool is slidably arranged on the upper portions of the four sliding columns, a detection chamber is arranged inside the detection pool, a taking and placing opening is formed in the upper end surface of the detection pool and communicated with the detection chamber, a plurality of through holes are formed in the bottom of the detection chamber of the detection pool and are respectively positioned above the clamping mechanisms of the device trays, the size of each through hole is matched with the bottleneck of an experimental device, the sealing elements are arranged on the through holes, the heaters are movably arranged on the upper end surface of the bottom plate, and the heaters are positioned below the clamping mechanisms of the device tray; fixing a plurality of experimental devices on a clamping mechanism of a device tray, resetting the experimental devices to the lower part of a test pool through a slide rail mechanism of the device tray, sliding the test pool downwards to enable bottle necks of the experimental devices to respectively pass through a plurality of through holes of the test pool, using a plurality of sealing pieces to respectively seal the bottle necks of the experimental devices and the holes among the through holes, filling ammonia water into one of the experimental devices, sealing and connecting a plurality of experimental devices by rubber plugs, glass tubes and the like used by the experimental devices, filling a water solution containing phenolphthalein into a test chamber of the test pool, enabling the phenolphthalein solution to be beyond the mouth parts of the experimental devices and the rubber plug glass tubes and other parts, moving a heater to the bottom of the experimental device filled with the ammonia water, starting the heater to heat the ammonia water, volatilizing the ammonia gas after the ammonia water is heated, enabling the internal pressure of the experimental devices to rise to achieve the pressure during the experiment, when the leakproofness of the opening part or the connecting part of the experimental device is poor, ammonia gas can leak into phenolphthalein solution, and the phenolphthalein solution at the leaking part can turn red, so that the leakproofness of the whole experimental device is tested, the leaking position can be determined, the targeted replacement is carried out, and the testing effect is improved.

Preferably, the equipment tray further comprises a drawing plate, a plurality of guide grooves, a plurality of clamping plates, a plurality of clamping pads, a plurality of stop blocks and a plurality of springs, wherein the upper end surface of the drawing plate is provided with a plurality of positioning holes, the plurality of positioning holes correspond to a plurality of through holes of the inspection pool respectively, the guide grooves are arranged on two sides of the positioning holes respectively, the two clamping plates are arranged in the guide grooves in a sliding manner, clamping ports of the two clamping plates are oppositely arranged, the clamping pads are arranged on the clamping ports of the clamping plates, the clamping pads are made of elastic materials, the stop blocks are arranged on the upper end surface of the drawing plate and are respectively positioned on the rear sides of the clamping plates, and the clamping plates and the stop blocks are respectively and elastically connected through the springs; compress a plurality of grip blocks, pass through the locating hole location of pull board with a plurality of experimental devices, loosen the grip block, the elasticity of spring makes the grip block live through the centre gripping pad with a plurality of experimental devices centre gripping, fixes a position accurate convenient follow-up operation, and the spring provides stable centre gripping dynamics simultaneously, improves the practicality.

Preferably, the equipment tray further comprises two tray side frames, a plurality of positioning bolts, tray chutes and handles, wherein the two tray side frames are respectively slidably mounted in the middles of the four sliding columns through sliding slot holes; the pull plate is arranged in the tray sliding grooves of the two tray side frames in a sliding mode, the pull plate is pulled out through the handle during the disassembly and assembly of the experimental device, the pull plate is reset in a sliding mode through the handle after the disassembly and assembly of the experimental device, the operation is convenient, and the operation convenience of the device is improved.

Preferably, the drawer device further comprises two lengthening sliding strips, the two lengthening sliding strips are respectively installed in tray sliding grooves of the two tray side frames in a sliding mode, and the two lengthening sliding strips are respectively connected with the lower end faces of the two sides of the drawing plate in a sliding mode; through installing two extension draw bars, increase the slip stroke of pull board pulling, there is bigger operating space during dismouting experimental apparatus, improves the practicality.

Preferably, the inspection pool also comprises an inspection pool bottom plate, a plurality of sliding sleeves, a plurality of sliding sleeve locking bolts, a pool wall plate and a plurality of through holes, the sliding sleeves are arranged at four corners of the inspection pool bottom plate and are in sliding connection with four sliding columns, the sliding sleeve locking bolts are arranged on the sliding sleeves, the pool wall plate is arranged on the upper end surface of the inspection pool bottom plate and forms an inspection chamber, the pool wall plate is made of transparent materials, the inspection pool bottom plate is uniformly provided with a plurality of through holes, the through holes correspond to a plurality of positioning holes on the pull plate, the diameter of each through hole is slightly larger than the bottleneck of the experimental equipment, and sealing elements are arranged on the through holes; after the fixed centre gripping of a plurality of experimental facilities was on the pull board, loosen a plurality of sliding sleeve check locks and tie, will inspect the pond bottom plate and descend, make a plurality of experimental facilities's bottleneck department pass a plurality of through-holes and stretch out, use a plurality of sealing members to seal the gap of bottleneck and a plurality of through-hole department, pour into phenolphthalein solution into the pond wallboard, transparent pond wallboard is convenient for observe, improves the practicality.

Preferably, the sealing element further comprises a sealing seat, threads, a sealing ring and a sealing nut, the sealing seat is mounted on the through hole, an outwards-expanding inclined inner wall is arranged on the sealing seat, the outer wall of the sealing seat is provided with the threads, the sealing ring is made of rubber materials, an inner hole of the sealing ring is slightly smaller than the bottleneck of the experimental equipment, an inwards-inclined outer wall is arranged on the outer wall of the sealing ring, the outer wall of the sealing ring is matched with the inner wall of the sealing seat, the sealing nut is provided with the through hole and internal threads, and the sealing nut presses the sealing ring into the sealing seat; the bottleneck of experimental device stretches out through the through-hole, overlaps the sealing washer on the bottleneck of experimental device, screws up gland nut on the seal receptacle, makes gland nut compress tightly the sealing washer and seals between the bottleneck of seal receptacle and experimental device, and the leakproofness is good, avoids the phenolphthalein in the pond wallboard to dissolve and presses and leak.

Preferably, the heating device further comprises a heat accumulating layer, a heating chamber is arranged in the heater, a heating wire is installed at the bottom of the heating chamber, the heat accumulating layer is arranged on the side wall of the heating chamber, and the heat accumulating layer is a high-temperature-resistant heat-insulating material; the bottom of the experimental device is placed in the heating chamber of the heater, the heat-collecting layer plays a role in heat insulation and heat collection, heat loss is reduced, the heat utilization rate is improved, and the temperature rising speed of the experimental device is increased.

Compared with the prior art, the utility model has the beneficial effects that: fixing a plurality of experimental devices on a clamping mechanism of a device tray, resetting the experimental devices to the lower part of a test pool through a slide rail mechanism of the device tray, sliding the test pool downwards to enable bottle necks of the experimental devices to respectively pass through a plurality of through holes of the test pool, using a plurality of sealing pieces to respectively seal the bottle necks of the experimental devices and the holes among the through holes, filling ammonia water into one of the experimental devices, sealing and connecting a plurality of experimental devices by rubber plugs, glass tubes and the like used by the experimental devices, filling a water solution containing phenolphthalein into a test chamber of the test pool, enabling the phenolphthalein solution to be beyond the mouth parts of the experimental devices and the rubber plug glass tubes and other parts, moving a heater to the bottom of the experimental device filled with the ammonia water, starting the heater to heat the ammonia water, volatilizing the ammonia gas after the ammonia water is heated, enabling the internal pressure of the experimental devices to rise to achieve the pressure during the experiment, when the leakproofness of the opening part or the connecting part of the experimental device is poor, ammonia gas can leak into phenolphthalein solution, and the phenolphthalein solution at the leaking part can turn red, so that the leakproofness of the whole experimental device is tested, the leaking position can be determined, the targeted replacement is carried out, and the testing effect is improved.

Drawings

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

FIG. 2 is a schematic diagram of a front view configuration of the present invention;

FIG. 3 is a schematic view of the construction of an equipment tray;

FIG. 4 is a schematic view of the structure of the test cell and seal;

FIG. 5 is a schematic view of a (magnified) construction of the heater;

in the drawings, the reference numbers: 1. a base plate; 2. a traveler; 3. an equipment tray; 4. a testing pool; 5. a seal member; 6. a heater; 7. a drawing plate; 8. a guide groove; 9. a clamping plate; 10. a clamping pad; 11. a stopper; 12. a spring; 13. a tray side frame; 14. positioning the bolt; 15. a tray chute; 16. a handle; 17. lengthening the slide bar; 18. inspecting the bottom plate of the pool; 19. a sliding sleeve; 20. a sliding sleeve locking bolt; 21. a pool wall plate; 22. a through hole; 23. a sealing seat; 24. a thread; 25. a seal ring; 26. a seal nut; 27. and a heat accumulating layer.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Example 1

A gas tightness testing device for experimental equipment comprises a bottom plate 1, four sliding columns 2, an equipment tray 3, a testing pool 4, a plurality of sealing elements 5 and a heater 6, wherein the sliding columns 2 are arranged at four corners of the upper end surface of the bottom plate 1, the equipment tray 3 is slidably arranged in the middle of the four sliding columns 2, a plurality of clamping mechanisms and sliding rail mechanisms are arranged on the equipment tray 3, the testing pool 4 is slidably arranged at the upper parts of the four sliding columns 2, a testing chamber is arranged inside the testing pool 4, a taking and placing opening is formed in the upper end surface of the testing pool 4 and communicated with the testing chamber, a plurality of through holes are formed in the bottom of the testing chamber of the testing pool 4 and are respectively positioned above the clamping mechanisms of the equipment trays 3, the size of each through hole is matched with the bottleneck of the experimental equipment, the sealing elements 5 are arranged on the through holes, the heater 6 is movably arranged on the upper end surface of the bottom plate 1, the heater 6 is positioned below the clamping mechanism of the equipment tray 3; fixing a plurality of experimental devices on a clamping mechanism of a device tray 3, resetting the experimental devices to the lower part of a test pool 4 through a slide rail mechanism of the device tray 3, sliding the test pool 4 downwards to enable bottle necks of the experimental devices to respectively pass through a plurality of through holes of the test pool 4, sealing the bottle necks of the experimental devices and the holes by using a plurality of sealing elements 5, filling ammonia water into one of the experimental devices, hermetically connecting a plurality of experimental devices by using rubber plugs, glass tubes and the like used by the experimental devices, filling a phenolphthalein-containing aqueous solution into a test chamber of the test pool 4, enabling the phenolphthalein solution to not pass through parts such as mouth parts and rubber plugs, glass tubes and the like of the experimental devices, moving a heater 6 to the bottom of the experimental devices filled with the ammonia water, starting the heater 6 to heat the ammonia water, volatilizing the ammonia gas after the ammonia water is heated, and enabling the internal pressure of the experimental devices to rise, pressure when reaching the experiment, when experimental device oral area or junction leakproofness are poor, the ammonia can leak into phenolphthalein solution, and the phenolphthalein solution of leak department can turn red, has both examined a whole set of experimental device leakproofness like this, can confirm the position of leaking again to carry out the change of pertinence, improve the inspection effect.

Example 2

A gas tightness testing device for experimental equipment comprises a bottom plate 1, four sliding columns 2, an equipment tray 3, a testing pool 4, a plurality of sealing elements 5 and a heater 6, wherein the sliding columns 2 are arranged at four corners of the upper end surface of the bottom plate 1, the equipment tray 3 is slidably arranged in the middle of the four sliding columns 2, a plurality of clamping mechanisms and sliding rail mechanisms are arranged on the equipment tray 3, the testing pool 4 is slidably arranged at the upper parts of the four sliding columns 2, a testing chamber is arranged inside the testing pool 4, a taking and placing opening is formed in the upper end surface of the testing pool 4 and communicated with the testing chamber, a plurality of through holes are formed in the bottom of the testing chamber of the testing pool 4 and are respectively positioned above the clamping mechanisms of the equipment trays 3, the size of each through hole is matched with the bottleneck of the experimental equipment, the sealing elements 5 are arranged on the through holes, the heater 6 is movably arranged on the upper end surface of the bottom plate 1, the heater 6 is positioned below the clamping mechanism of the equipment tray 3; the equipment tray 3 further comprises a drawing plate 7, a plurality of guide grooves 8, a plurality of clamping plates 9, a plurality of clamping pads 10, a plurality of stop blocks 11 and a plurality of springs 12, a plurality of positioning holes are formed in the upper end face of the drawing plate 7 and correspond to a plurality of through holes of the inspection pool 4 respectively, the guide grooves 8 are installed on two sides of each positioning hole, two clamping plates 9 are installed in each guide groove 8 in a sliding mode, clamping ports of the two clamping plates 9 are arranged oppositely, clamping pads 10 are installed on clamping ports of the clamping plates 9, the clamping pads 10 are made of elastic materials, the stop blocks 11 are installed on the upper end face of the drawing plate 7, the stop blocks 11 are located on the rear sides of the clamping plates 9 respectively, and the clamping plates 9 are elastically connected with the stop blocks 11 through the springs 12 respectively; the equipment tray 3 further comprises two tray side frames 13, a plurality of positioning bolts 14, tray sliding grooves 15 and handles 16, the two tray side frames 13 are respectively slidably mounted in the middles of the four sliding columns 2 through sliding groove holes, the positioning bolts 14 are mounted on the side walls of the sliding groove holes of the two tray side frames 13, the two tray side frames 13 are fastened on the sliding columns 2 through the positioning bolts 14, the tray sliding grooves 15 are arranged on the inner sides of the two tray side frames 13, the pull plate 7 is slidably mounted in the two tray sliding grooves 15, and the handle 16 is arranged at the right end of the pull plate 7; the two lengthening sliding strips 17 are respectively installed in the tray sliding grooves 15 of the two tray side frames 13 in a sliding mode, and the two lengthening sliding strips 17 are respectively connected with the lower end faces of the two sides of the drawing plate 7 in a sliding mode; pull out board 7 and two extension draw runner 17 through handle 16, compress a plurality of grip blocks 9, pass through the locating hole location of pull out board 7 with a plurality of experimental facilities, loosen grip block 9, the elasticity of spring 12 makes grip block 9 grasp a plurality of experimental facilities through centre gripping pad 10, slide through handle 16 with pull out board 7 and reset

Example 3

A gas tightness testing device for experimental equipment comprises a bottom plate 1, four sliding columns 2, an equipment tray 3, a testing pool 4, a plurality of sealing elements 5 and a heater 6, wherein the sliding columns 2 are arranged at four corners of the upper end surface of the bottom plate 1, the equipment tray 3 is slidably arranged in the middle of the four sliding columns 2, a plurality of clamping mechanisms and sliding rail mechanisms are arranged on the equipment tray 3, the testing pool 4 is slidably arranged at the upper parts of the four sliding columns 2, a testing chamber is arranged inside the testing pool 4, a taking and placing opening is formed in the upper end surface of the testing pool 4 and communicated with the testing chamber, a plurality of through holes are formed in the bottom of the testing chamber of the testing pool 4 and are respectively positioned above the clamping mechanisms of the equipment trays 3, the size of each through hole is matched with the bottleneck of the experimental equipment, the sealing elements 5 are arranged on the through holes, the heater 6 is movably arranged on the upper end surface of the bottom plate 1, the heater 6 is positioned below the clamping mechanism of the equipment tray 3; the inspection pool 4 further comprises an inspection pool bottom plate 18, a plurality of sliding sleeves 19, a plurality of sliding sleeve locking bolts 20, a pool wall plate 21 and a plurality of through holes 22, the sliding sleeves 19 are arranged at four corners of the inspection pool bottom plate 18, the sliding sleeves 19 are in sliding connection with the four sliding columns 2, the sliding sleeve locking bolts 20 are arranged on the sliding sleeves 19, the pool wall plate 21 is installed on the upper end face of the inspection pool bottom plate 18, the pool wall plate 21 forms an inspection chamber, the pool wall plate 21 is made of transparent materials, the inspection pool bottom plate 18 is uniformly provided with the through holes 22, the through holes 22 correspond to the positioning holes in the drawing plate 7, the diameter of each through hole 22 is slightly larger than the bottleneck of an experimental device, and the sealing elements 5 are arranged on the through holes 22; the sealing element 5 further comprises a sealing seat 23, threads 24, a sealing ring 25 and a sealing nut 26, the sealing seat 23 is installed on the through hole 22, an outwards-opened inclined inner wall is arranged on the sealing seat 23, the threads 24 are arranged on the outer wall of the sealing seat 23, the sealing ring 25 is made of rubber materials, an inner hole of the sealing ring 25 is slightly smaller than the bottleneck of the experimental equipment, an inwards-inclined outer wall is arranged on the outer wall of the sealing ring 25, the outer wall of the sealing ring 25 is matched with the inner wall of the sealing seat 23, the sealing nut 26 is provided with the through hole and internal threads, and the sealing ring 25 is pressed into the sealing seat 23 by the sealing nut 26; the fixed centre gripping of experimental apparatus is back on pull board 7, loosen a plurality of sliding sleeve locking bolt 20, to examine the decline of pond bottom plate 18, make a plurality of experimental apparatus's bottleneck department pass a plurality of through-holes 22 and stretch out, overlap sealing washer 25 on the bottleneck of experimental apparatus, screw up sealing nut 26 on seal receptacle 23, make sealing nut 26 compress tightly sealing washer 25 between the bottleneck of seal receptacle 23 and experimental apparatus, pour into phenolphthalein solution into pond wallboard 21, transparent pond wallboard 21 is convenient for observe, the leakproofness is good.

As shown in fig. 1 to 5, in the air tightness testing device for experimental equipment of the present invention, during operation, a plurality of clamping plates 9 are compressed, a plurality of experimental equipment are positioned by positioning holes of a drawing plate 7, the clamping plates 9 are released, the clamping plates 9 clamp the plurality of experimental equipment by clamping pads 10 by the elasticity of springs 12, the testing tank is reset to the lower part of a testing tank 4 by pushing a handle 16, then a testing tank bottom plate 18 is slid downwards, bottle necks of the plurality of experimental equipment pass through a plurality of through holes 22 respectively, sealing nuts 26 are screwed on a sealing seat 23, sealing nuts 26 press a sealing ring 25 between the sealing seat 23 and the bottle necks of the experimental equipment, ammonia water is filled into one of the experimental equipment, rubber plugs, glass tubes, etc. used by the experimental equipment are connected in a sealing manner, then an aqueous solution containing phenolphthalein is filled into a tank wall plate 21, phenolphthalein solution has not crossed parts such as oral area and rubber buffer glass pipe of experimental device, move heater 6 to the experimental device bottom of having annotated the aqueous ammonia at last, it heats the aqueous ammonia to open heater 6, the aqueous ammonia can volatilize the ammonia after being heated, make the internal pressure of experimental device rise, pressure when reaching the experiment, when experimental device oral area or junction leakproofness are poor, the ammonia can leak into phenolphthalein solution, the phenolphthalein solution of leak department can turn red, and then inspect a whole set of experimental device leakproofness, and confirm the leakage position.

The main functions realized by the utility model are as follows: the tightness of the whole set of experimental equipment is tested, the leakage position is determined, and the test effect is good.

According to the air tightness testing device for the experimental equipment, the installation mode, the connection mode or the arrangement mode are common mechanical modes, and the air tightness testing device can be implemented as long as the beneficial effects of the air tightness testing device can be achieved; the sliding column 2, the heater 6, the sealing ring 25, the sealing nut 26, the heat accumulating layer 27 and the spring 12 of the air tightness testing device for the experimental equipment are purchased from the market, and the technical personnel in the industry only need to install and operate according to the attached operating instructions without creative labor of the technical personnel in the field.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The air tightness testing device for the experimental equipment is characterized by comprising a bottom plate (1), four sliding columns (2), an equipment tray (3), a testing pool (4), a plurality of sealing pieces (5) and a heater (6), wherein the sliding columns (2) are arranged at four corners of the upper end surface of the bottom plate (1), the equipment tray (3) is slidably arranged in the middle of the four sliding columns (2), the equipment tray (3) is provided with a plurality of clamping mechanisms and sliding rail mechanisms, the testing pool (4) is slidably arranged at the upper parts of the four sliding columns (2), a testing chamber is arranged inside the testing pool (4), the upper end surface of the testing pool (4) is provided with a taking and placing port which is communicated with the testing chamber, the bottom of the testing chamber of the testing pool (4) is provided with a plurality of through holes which are respectively positioned above the clamping mechanisms of the equipment trays (3), and the size of the through holes is matched with the bottleneck of the experimental equipment, all install sealing member (5) on the through-hole, heater (6) movable mounting is on the up end of bottom plate (1), and heater (6) are located equipment tray (3) fixture's below.

2. The airtightness testing device for experimental equipment according to claim 1, wherein the equipment tray (3) further comprises a pull plate (7), a plurality of guide grooves (8), a plurality of clamping plates (9), a plurality of clamping pads (10), a plurality of stoppers (11) and a plurality of springs (12), the upper end surface of the pull plate (7) is provided with a plurality of positioning holes, the plurality of positioning holes correspond to the plurality of through holes of the testing tank (4), the guide grooves (8) are mounted on both sides of the positioning holes, the two clamping plates (9) are slidably mounted in the guide grooves (8), the clamping ports of the two clamping plates (9) are arranged oppositely, the clamping pads (10) are mounted on the clamping ports of the clamping plates (9), the clamping pads (10) are made of elastic material, the plurality of stoppers (11) are mounted on the upper end surface of the pull plate (7), the plurality of stoppers (11) are located on the rear sides of the plurality of clamping plates (9), the plurality of clamping plates (9) and the plurality of stoppers (11) are respectively elastically connected through a plurality of springs (12).

3. The airtightness testing device for the experimental apparatus according to claim 2, wherein the apparatus tray (3) further comprises two tray side frames (13), a plurality of positioning bolts (14), tray sliding grooves (15) and handles (16), the two tray side frames (13) are respectively slidably mounted in the middle of the four sliding columns (2) through sliding slot holes, the positioning bolts (14) are respectively mounted on the side walls of the sliding slot holes of the two tray side frames (13), the two tray side frames (13) are fastened on the sliding columns (2) through the positioning bolts (14), the tray sliding grooves (15) are respectively disposed on the inner sides of the two tray side frames (13), the pull plate (7) is slidably mounted in the two tray sliding grooves (15), and the handle (16) is disposed at the right end of the pull plate (7).

4. The airtightness testing apparatus for experimental devices according to claim 3, further comprising two elongated slides (17), wherein the two elongated slides (17) are slidably mounted in the tray sliding grooves (15) of the two tray side frames (13), respectively, and the two elongated slides (17) are slidably connected to the lower end surfaces of the two sides of the drawer plate (7), respectively.

5. The airtightness testing device for the experimental equipment according to claim 1, wherein the testing tank (4) further comprises a testing tank bottom plate (18), a plurality of sliding sleeves (19), a plurality of sliding sleeve locking bolts (20), a tank wall plate (21) and a plurality of through holes (22), the sliding sleeves (19) are disposed at four corners of the testing tank bottom plate (18), the sliding sleeves (19) are slidably connected with the four sliding columns (2), the sliding sleeve locking bolts (20) are disposed on the plurality of sliding sleeves (19), the tank wall plate (21) is mounted on an upper end surface of the testing tank bottom plate (18), the tank wall plate (21) forms a testing chamber, the tank wall plate (21) is made of a transparent material, the testing tank bottom plate (18) is uniformly provided with the plurality of through holes (22), the plurality of through holes (22) correspond to the plurality of positioning holes on the pull-out plate (7), and the diameter of the through holes (22) is slightly larger than the bottleneck of the experimental equipment, sealing elements (5) are arranged on the through holes (22).

6. The air tightness testing device for the experimental equipment as claimed in claim 5, wherein the sealing member (5) further comprises a sealing seat (23), a thread (24), a sealing ring (25) and a sealing nut (26), the sealing seat (23) is installed on the through hole (22), the sealing seat (23) is provided with an outward-expanding inclined inner wall, the outer wall of the sealing seat (23) is provided with the thread (24), the sealing ring (25) is made of rubber material, the inner hole of the sealing ring (25) is slightly smaller than the bottleneck of the experimental equipment, the outer wall of the sealing ring (25) is provided with an inward-inclined outer wall, the outer wall of the sealing ring (25) is matched with the inner wall of the sealing seat (23), the sealing nut (26) is provided with the through hole and an internal thread, and the sealing nut (26) presses the sealing ring (25) into the sealing seat (23).

7. The airtightness verifying apparatus for experimental devices according to claim 1, further comprising a heat accumulating layer (27), wherein a heating chamber is provided inside the heater (6), a heating wire is installed at a bottom of the heating chamber, the heat accumulating layer (27) is provided on a side wall of the heating chamber, and the heat accumulating layer (27) is provided as a high-temperature resistant heat insulating material.

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