CN113090940B

CN113090940B - Equipment for preventing hazardous gas leakage in colleges and universities laboratory

Info

Publication number: CN113090940B
Application number: CN202110414824.3A
Authority: CN
Inventors: 金泥沙; 陈婧
Original assignee: Hebei University of Environmental Engineering
Current assignee: Hebei University of Environmental Engineering
Priority date: 2021-04-17
Filing date: 2021-04-17
Publication date: 2022-08-12
Anticipated expiration: 2041-04-17
Also published as: CN113090940A

Abstract

The invention relates to the technical field of laboratory equipment, and discloses a safety gas leakage prevention device for a college laboratory, which comprises a tank body, a pressure sensor and a gas concentration detection sensor, wherein an opening is formed in the upper end of the tank body, an annular plate is fixedly connected to the opening, a plurality of uniformly distributed clamping blocks are fixedly connected to the upper end of the annular plate, a sealing plate is arranged at the upper end of the annular plate, a cross rod is fixedly connected to the upper end of the sealing plate, a plurality of connecting rods are fixedly connected to the upper end of the cross rod, a braking ring is fixedly connected to the upper ends of the connecting rods together, and a plurality of clamping grooves are formed in the rod wall of the cross rod. This equipment is revealed to colleges and universities laboratory prevention danger gas can effectively save the danger gas after compression and the liquefaction, also can reduce the inside and outside pressure differential of danger gas packing jar when the storage moreover, can also monitor the leakage of danger gas in less space, can effectively handle contaminated gas when taking place to leak.

Description

Equipment for preventing hazardous gas leakage in colleges and universities laboratory

Technical Field

The invention relates to the technical field of laboratory equipment, in particular to equipment for preventing hazardous gas leakage in a colleges and universities laboratory.

Background

The chemicals which are inflammable, explosive, poisonous and corrosive are called dangerous chemicals, the dangerous chemicals are different in different occasions, such as chemical products in production, operation and use places, the dangerous chemicals are generally called teaching test products in scientific research laboratories, college laboratories and the like, and are divided into explosives, compressed gas and liquefied gas, inflammable liquid, inflammable solid, spontaneous combustion articles and inflammable articles meeting humidity, oxidants and organic peroxides, poisons and corrosive articles according to different types of the chemical articles, therefore, when the chemical articles are stored in the laboratories, the chemical articles are not only stored in classification, but also prevented from leaking, particularly the storage of the compressed gas and the liquefied gas, the storage temperature is not only complied, and the chemical articles are also required to enter the laboratories to be monitored in real time by using equipment such as a gas concentration detection sensor, prevent the gas from leaking to the air and polluting the environment in the laboratory.

At present, although the concentration that uses check out test set can detect gaseous judges there is dangerous gas leakage, but the storage space in the laboratory is great, is difficult to take counter-measure to the gas in the great space when taking place the hazardous articles leakage to the pressure differential is great inside and outside the packing jar of compressed gas and liquefied gas, and gas is very easily leaked from the valve department on the packing jar, and traditional monitoring facilities also are difficult to carry out effectual control when leaking the volume less.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides equipment for preventing leakage of hazardous gas in a college laboratory, which can effectively store the compressed and liquefied hazardous gas, reduce the pressure difference between the inside and the outside of a hazardous gas packaging can during storage, monitor the leakage of the hazardous gas in a small space, and effectively treat the polluted gas during leakage, thereby solving the problems that the storage space in the laboratory is large, the gas in a large space is difficult to take countermeasures during leakage of hazardous articles, the pressure difference between the inside and the outside of the packaging can of the compressed gas and the liquefied gas is large, the gas is easy to leak from a valve on the packaging can, and the traditional detection equipment is difficult to effectively monitor during leakage.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a dangerous gas leakage prevention device for a college laboratory comprises a tank body, a pressure sensor and a gas concentration detection sensor, wherein an opening is formed in the upper end of the tank body, a ring-shaped plate is fixedly connected to the opening, a plurality of clamping blocks which are uniformly distributed are fixedly connected to the upper end of the ring-shaped plate, a sealing plate is arranged at the upper end of the ring-shaped plate, a cross rod is fixedly connected to the upper end of the sealing plate, a plurality of connecting rods are fixedly connected to the upper end of the cross rod, a braking ring is fixedly connected to the upper end of each connecting rod, a plurality of clamping grooves are formed in the rod wall of the cross rod and are respectively matched with the clamping blocks, a sealing ring is fixedly connected to the lower end of the sealing plate, a sleeve is sleeved in the ring-shaped plate, the upper end of the sleeve is fixedly connected with the lower end of the sealing plate, and a rubber tube is fixedly connected to the lower end of the ring-shaped plate, the sealing device is characterized in that a sealing mechanism is connected to the pipe wall of the rubber pipe, a connecting pipe is fixedly connected to the side wall of the tank body, a fixing mechanism is connected to the connecting pipe, an air inlet pipe is fixedly connected to the side wall of the tank body, an air valve is fixedly connected to the pipe wall of the air inlet pipe, a quick connector is fixedly connected to one end, far away from the tank body, of the air inlet pipe, and the pressure sensor and the gas concentration detection sensor are both fixed to the lower end of the sealing plate.

Preferably, sealing mechanism includes two rubber rings, two the rubber ring all with the inner wall fixed connection of rubber tube, two annular grooves have been seted up on the sheathed tube pipe wall, two the annular groove cooperatees with two rubber rings respectively, the lower extreme fixedly connected with ring of rubber tube, the edge of ring and the inner wall fixed connection of the jar body, the lower extreme fixedly connected with rubber packing ring of ring, the upper end fixedly connected with rubber sleeve of rubber packing ring, the rubber sleeve cup joints with the sheathed tube inner wall, the lateral wall of ring passes through a plurality of evenly distributed's of round hole fixedly connected with pipe.

Preferably, the inner side of the rubber sleeve is slidably connected with a plurality of arc blocks which are uniformly distributed, the arc blocks are distributed in an annular shape, the side wall of each arc block is fixedly connected with an elastic sheet, and the upper end of each elastic sheet is fixedly connected with the lower end of the corresponding sealing plate.

Preferably, the fixing mechanism comprises a rotating shaft, the shaft wall of the rotating shaft is rotatably connected with the inner wall of the connecting pipe through two bearing sleeves, one end of the rotating shaft extends into the tank body and is fixedly connected with a screw rod, the pipe wall of the rubber pipe is sleeved with an elastic ring, the side wall of the elastic ring is provided with a notch, the notch is respectively provided with a first connecting part and a second connecting part, the side wall of the first connecting part is in threaded connection with the rod wall of the screw rod through a threaded hole, the side wall of the second connecting part is sleeved with the rod wall of the screw rod through a round opening, the second connecting part is fixedly connected with the pipe orifice of the connecting pipe, one end of the rotating shaft far away from the screw rod penetrates through the connecting pipe and is fixedly connected with a hand wheel, the shaft wall of the rotating shaft is sleeved with an annular block, one side of the annular block is fixedly connected with the pipe orifice of the connecting pipe, and the shaft wall of the rotating shaft is fixedly connected with a limiting ring.

Preferably, the inclined plane has been seted up to the annular block one side relative with the spacing ring, the rubber block of fixedly connected with round platform column structure on the axle wall of pivot, the one end of rubber block is located the inclined plane on the annular block, the other end of rubber block and one side fixed connection of spacing ring, the rectangle through-hole has been seted up to one side of elastic ring, and the lateral wall of second connecting portion is run through to one side of rectangle through-hole, the endotheca has the arc pole in the rectangle through-hole, the one end of arc pole and one side fixed connection of first connecting portion.

Preferably, the center of the inner wall of the lower end of the tank body is rotatably connected with a supporting shaft through a rolling bearing, the upper end of the supporting shaft is fixedly connected with a circular plate, the upper end of the circular plate is fixedly connected with a bushing, and the inner side of the bushing is uniformly and fixedly connected with a plurality of annular bearing plates.

(III) advantageous effects

Compared with the prior art, the invention provides equipment for preventing hazardous gas leakage in a college laboratory, which has the following beneficial effects:

1. when the invention is used, small package hazardous gas is placed on the annular bearing plate, large package hazardous gas is placed on the circular plate, then the sealing plate is covered, the brake ring is pressed with force to drive the connecting rod to drive the cross rod to move downwards, the cross rod moves downwards to drive the sealing plate to extrude the sealing ring, the sealing ring is stressed and contracted to rotate the brake ring, the brake ring drives the connecting rod to rotate the cross rod, the cross rod moves to the lower part of the clamping block when rotating, then the brake ring is released, the sealing ring is elastically reset to push the sealing plate to lift the cross rod, the clamping groove is clamped with the clamping block when the cross rod rises, thus the sealing plate can be quickly installed, then an external high-pressure gas pipe is connected with the quick connector and the gas valve is opened, further high-pressure gas can be filled into the tank body, the pressure outside the hazardous gas packaging tank is increased, the internal and external pressures of the packaging tank tend to be balanced, and further gas leakage can be prevented, and jar internal space is less to pressure sensor and gas concentration detection sensor of setting on the closing plate can effectively monitor whether have the danger gas leakage, can follow quick-operation joint and collect contaminated gas when taking place the danger gas leakage, are favorable to timely effectual processing contaminated air.

2. When the sealing plate is fixed, the elastic sheet on the sealing plate pushes the arc-shaped block to extrude the rubber sleeve to be attached to the inner wall of the sleeve, so that the sealing performance between the rubber sleeve and the sleeve is effectively improved, and the self-sealing effect between the tank body and the sealing plate can be realized by utilizing the air pressure during inflation.

3. When the fixing mechanism is used, the hand wheel is rotated by hands to drive the rotating shaft to rotate the screw rod, the screw rod interacts with a threaded hole on the first connecting part when rotating, so that the first connecting part drives the diameter of the elastic ring to change, the rubber tube can be tightly contacted with the sleeve when the diameter of the elastic ring is reduced, the sealing property between the sleeve and the rubber tube can be improved, when the elastic ring deforms, the arc-shaped rod on the first connecting part can move in the rectangular through hole on the second connecting part and the elastic ring, so that the rubber tube at the upper opening of the elastic ring can be extruded by the arc-shaped rod, when the rotating shaft drives the screw rod to rotate and interacts with the first connecting part, the rotating shaft is pulled to move by the reverse force of the first connecting part, and when the rotating shaft moves, the limiting ring and the rubber block are driven to move into the annular block, so that the rubber block is tightly contacted with the annular block to play a sealing role, and then can seal the mouth of pipe department of connecting pipe in step when fixed elastic ring, convenience of customers uses, when taking and depositing article, but at first the fixed and rubber block of fixed establishment to the rubber tube and the contact dynamics between the annular mass are relieved to the reverse rotation hand wheel, and the internal gas of jar this moment passes the connecting pipe and discharges, plays the effect of pressure release in advance, also can directly open the pneumatic valve simultaneously and carry out the pressure release.

Drawings

FIG. 1 is a schematic structural diagram of a hazardous gas leakage prevention device in a laboratory of colleges and universities according to the present invention;

FIG. 2 is a schematic view of the internal structure of the tank body in FIG. 1 of the hazardous gas leakage prevention device in a college laboratory according to the present invention;

FIG. 3 is a schematic structural diagram of a hazardous gas leakage prevention device in a college laboratory, which is provided by the invention, and the sealing mechanism in FIG. 2 is shown in the figure;

FIG. 4 is a schematic structural view of a cross bar and a brake ring in FIG. 1 of the hazardous gas leakage prevention apparatus for laboratories of colleges and universities according to the present invention;

FIG. 5 is a schematic structural diagram of a sealing plate and a sleeve in FIG. 2 of a hazardous gas leakage prevention device in a college laboratory according to the present invention;

FIG. 6 is a schematic structural diagram of a safety mechanism in FIG. 2 of a laboratory hazardous gas leakage prevention device in colleges and universities according to the present invention;

fig. 7 is a schematic structural diagram of a sealing plate, an annular plate, a ring, a rubber tube and a sealing ring in fig. 2 of the hazardous gas leakage prevention device for laboratories of colleges and universities according to the present invention.

In the figure: 1. a tank body; 2. a connecting pipe; 3. a ring block; 4. a hand wheel; 5. an annular plate; 6. a sealing plate; 7. a cross bar; 8. a brake ring; 9. a connecting rod; 10. an air valve; 11. a quick coupling; 12. an elastic ring; 13. a rubber gasket; 14. an annular bearing plate; 15. a bushing; 16. a circular plate; 17. a circular ring; 18. a rubber tube; 19. a rubber ring; 20. a conduit; 21. a screw rod; 22. a first connection portion; 23. a second connecting portion; 24. an arcuate bar; 25. a rotating shaft; 26. a rubber block; 27. a limiting ring; 28. a sleeve; 29. an arc-shaped block; 30. an elastic sheet; 31. a gas concentration detection sensor; 32. a pressure sensor; 33. a seal ring; 34. a clamping block; 35. a rubber sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

a laboratory dangerous gas leakage prevention device in colleges and universities comprises a tank body 1, a pressure sensor 32 and a gas concentration detection sensor 31, wherein an opening is formed in the upper end of the tank body 1, a ring-shaped plate 5 is fixedly connected to the opening, a plurality of clamping blocks 34 which are uniformly distributed are fixedly connected to the upper end of the ring-shaped plate 5, a sealing plate 6 is arranged at the upper end of the ring-shaped plate 5, a cross rod 7 is fixedly connected to the upper end of the sealing plate 6, a plurality of connecting rods 9 are fixedly connected to the upper end of the cross rod 7, a braking ring 8 is fixedly connected to the upper ends of the connecting rods 9 together, a plurality of clamping grooves are formed in the rod wall of the cross rod 7, the clamping grooves are respectively matched with the clamping blocks 34, a sealing ring 33 is fixedly connected to the lower end of the sealing plate 6, a sleeve 28 is sleeved in the ring-shaped plate 5, the upper end of the sleeve 28 is fixedly connected to the lower end of the sealing plate 6, and a rubber tube 18 is fixedly connected to the lower end of the ring-shaped plate 5, be connected with sealing mechanism on the pipe wall of rubber tube 18, the lateral wall fixedly connected with connecting pipe 2 of the jar body 1, connecting pipe 2 in-connection has fixed establishment, the lateral wall fixedly connected with intake pipe of the jar body 1, fixedly connected with pneumatic valve 10 on the pipe wall of intake pipe, the one end fixedly connected with quick-operation joint 11 of the jar body 1 is kept away from to the intake pipe, pressure sensor 32 and gas concentration detection sensor 31 are all fixed at the lower extreme of closing plate 6, the lower extreme inner wall center department of the jar body 1 rotates through antifriction bearing and is connected with the back shaft, the upper end fixedly connected with plectane 16 of back shaft, the upper end fixedly connected with bush 15 of plectane 16, the even a plurality of annular loading boards of fixedly connected with of inboard 14 of bush 15.

When the invention is used, a small package hazardous gas is placed on the annular bearing plate 14, a large package hazardous gas is placed on the circular plate 16, then the sealing plate 6 is covered, the brake ring 8 is pressed forcibly to enable the connecting rod 9 to drive the cross rod 7 to move downwards, the cross rod 7 moves downwards to drive the sealing plate 6 to extrude the sealing ring 33, the sealing ring 33 is stressed to contract and then rotates the brake ring 8, the brake ring 8 drives the connecting rod 9 to enable the cross rod 7 to rotate, the cross rod 7 moves to the lower part of the clamping block 34 when rotating, then the brake ring 8 is loosened, the sealing ring 33 is elastically reset to push the sealing plate 6 to enable the cross rod 7 to rise, the clamping groove is clamped with the clamping block 34 when the cross rod 7 rises, further, the sealing plate 6 can be quickly installed, then an external high-pressure gas pipe (not shown in the figure) is connected with the quick connector 11, the gas valve 10 is opened, further, high-pressure gas can be filled into the tank body 1 to increase the pressure outside the hazardous gas packaging tank, make the pressure tend to balance inside and outside the packing jar, and then can prevent gas leakage, and jar body 1 inner space is less to pressure sensor 32 and gas concentration detection sensor 31 that set up on closing plate 6 can effectively monitor have or not have the gaseous leakage of danger, can follow quick-operation joint 11 and collect contaminated gas when taking place the gaseous leakage of danger, are favorable to timely effectual processing contaminated air.

Example 2: the difference is based on example 1;

sealing mechanism includes two rubber rings 19, two rubber rings 19 all with the inner wall fixed connection of rubber tube 18, two annular grooves have been seted up on the pipe wall of sleeve pipe 28, two annular grooves cooperate with two rubber rings 19 respectively, the lower extreme fixedly connected with ring 17 of rubber tube 18, the edge of ring 17 and the inner wall fixed connection of the jar body 1, the lower extreme fixedly connected with rubber packing ring 13 of ring 17, the upper end fixedly connected with rubber sleeve 35 of rubber packing ring 13, rubber sleeve 35 cup joints with the inner wall of sleeve pipe 28, the lateral wall of ring 17 passes through the pipe 20 of a plurality of evenly distributed of round hole fixedly connected with, the inboard sliding connection of rubber sleeve 35 has a plurality of evenly distributed's arc piece 29, a plurality of arc pieces 29 are the annular distribution, the lateral wall fixedly connected with flexure strip 30 of arc piece 29, the upper end of flexure strip 30 and the lower extreme fixed connection of closing plate 6.

When the sealing mechanism is used, when the air pressure in the tank body 1 is increased, the air passes through the guide pipe 20 and enters a space formed by the annular plate 5, the rubber pipe 18, the circular ring 17 and the tank body 1, when the air pressure is increased, the rubber pipe 18 is stressed to deform and extrudes the rubber ring 19 to be in contact with the sleeve 28, so that the sealing effect can be realized, and the rubber sleeve 35 is stressed to deform and adhere to the inner wall of the sleeve 28, so that the sealing effect can be effectively realized, the air leakage in the tank body 1 is prevented, when the sealing plate 6 is fixed, the elastic sheet 30 on the sealing plate 6 pushes the arc-shaped block 29 to extrude the rubber sleeve 35 to adhere to the inner wall of the sleeve 28, the sealing property between the rubber sleeve 35 and the sleeve 28 is effectively improved, and the self-sealing effect between the tank body 1 and the sealing plate 6 can be realized by utilizing the air pressure during inflation.

Example 3: the difference is based on example 1;

the fixing mechanism comprises a rotating shaft 25, the shaft wall of the rotating shaft 25 is rotatably connected with the inner wall of the connecting pipe 2 through two bearing sleeves, one end of the rotating shaft 25 extends into the tank body 1 and is fixedly connected with a screw rod 21, an elastic ring 12 is sleeved on the pipe wall of the rubber pipe 18, a notch is arranged on the side wall of the elastic ring 12, a first connecting part 22 and a second connecting part 23 are respectively arranged at the notch, the side wall of the first connecting part 22 is in threaded connection with the rod wall of the screw rod 21 through a threaded hole, the side wall of the second connecting part 23 is sleeved with the rod wall of the screw rod 21 through a round opening, the second connecting part 23 is fixedly connected with the pipe orifice of the connecting pipe, one end of the rotating shaft 25 far away from the screw rod 21 penetrates through the connecting pipe 2 and is fixedly connected with a hand wheel 4, an annular block 3 is sleeved on the shaft wall of the rotating shaft 25, one side of the annular block 3 is fixedly connected with the pipe orifice of the connecting pipe 2, a limiting ring 27 is fixedly connected on the shaft wall of the rotating shaft 25, the inclined plane has been seted up with the relative one side of spacing ring 27 to annular piece 3, fixedly connected with round platform column structure's rubber block 26 on the axle wall of pivot 25, the one end of rubber block 26 is located the inclined plane on annular piece 3, the other end of rubber block 26 and one side fixed connection of spacing ring 27, the rectangle through-hole has been seted up to one side of elastic ring 12, and the lateral wall of second connecting portion 23 is run through to one side of rectangle through-hole, the endotheca has curved bar 24 in the rectangle through-hole, the one end of curved bar 24 and one side fixed connection of first connecting portion 22.

When the fixing mechanism is used, the hand wheel 4 is rotated by hands to drive the rotating shaft 25 to rotate the screw rod 21, the screw rod 21 interacts with a threaded hole on the first connecting part 22 when rotating, so that the first connecting part 22 drives the diameter of the elastic ring 12 to change, the rubber tube 18 can be tightly contacted with the sleeve 28 when the diameter of the elastic ring 12 is reduced, the sealing property between the sleeve 28 and the rubber tube 18 can be improved, when the elastic ring 12 deforms, the arc-shaped rod 24 on the first connecting part 22 can move in the rectangular through holes on the second connecting part 23 and the elastic ring 12, so that the rubber tube 18 at the upper opening of the elastic ring 12 can be extruded by the arc-shaped rod 24, when the rotating shaft 25 drives the screw rod 21 to rotate and interact with the first connecting part 22, the rotating shaft 25 is pulled by the reverse force of the first connecting part 22 to move, and when the rotating shaft 25 moves, the limiting ring 27 and the rubber block 26 are driven to move into the annular block 3, make block rubber 26 and ring block 3 in close contact with play sealed effect, and then can seal the mouth of pipe department of connecting pipe 2 in step when fixed elastic ring 12, convenience of customers uses, when taking and depositing article, but at first reverse rotation hand wheel 4 removes the fixed and block rubber 26 and ring block 3 contact dynamics of fixed establishment to rubber tube 18, the gas in the jar body 1 passes connecting pipe 2 and discharges this moment, play the effect of pressure release in advance, also can directly open pneumatic valve 10 simultaneously and carry out the pressure release.

It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an equipment is revealed to colleges and universities laboratory prevention danger gas, includes jar body (1), pressure sensor (32) and gas concentration detection sensor (31), its characterized in that: the upper end of the tank body (1) is provided with an opening, the opening is fixedly connected with a ring-shaped plate (5), the upper end of the ring-shaped plate (5) is fixedly connected with a plurality of clamping blocks (34) which are uniformly distributed, the upper end of the ring-shaped plate (5) is provided with a sealing plate (6), the upper end of the sealing plate (6) is fixedly connected with a cross rod (7), the upper end of the cross rod (7) is fixedly connected with a plurality of connecting rods (9), the upper ends of the connecting rods (9) are fixedly connected with a braking ring (8) together, the rod wall of the cross rod (7) is provided with a plurality of clamping grooves, the clamping grooves are respectively matched with the clamping blocks (34), the lower end of the sealing plate (6) is fixedly connected with a sealing ring (33), a sleeve (28) is sleeved in the ring-shaped plate (5), and the upper end of the sleeve (28) is fixedly connected with the lower end of the sealing plate (6), the lower extreme fixedly connected with rubber tube (18) of annular slab (5), be connected with sealing mechanism on the pipe wall of rubber tube (18), sealing mechanism includes two rubber ring (19), two rubber ring (19) all with the inner wall fixed connection of rubber tube (18), seted up two annular grooves on the pipe wall of sleeve pipe (28), two the annular groove cooperatees with two rubber ring (19) respectively, the lower extreme fixedly connected with ring (17) of rubber tube (18), the edge of ring (17) and the inner wall fixed connection of the jar body (1), the lower extreme fixedly connected with rubber packing ring (13) of ring (17), the upper end fixedly connected with rubber sleeve (35) of rubber packing ring (13), rubber sleeve (35) cup joints with the inner wall of sleeve pipe (28), the lateral wall of ring (17) passes through a plurality of evenly distributed's pipe (20) of round hole fixedly connected with, the utility model discloses a jar body, including jar body (1), the lateral wall fixedly connected with connecting pipe (2) of the body, connecting pipe (2) in-connection has fixed establishment, fixed establishment includes pivot (25), the axle wall of pivot (25) rotates through the inner wall of two bearing housings and connecting pipe (2) to be connected, the one end of pivot (25) extends to jar body (1) in and fixedly connected with lead screw (21), elasticity ring (12) have been cup jointed on the pipe wall of rubber tube (18), the incision has been seted up to the lateral wall of elasticity ring (12), incision department is equipped with first connecting portion (22) and second connecting portion (23) respectively, the lateral wall of first connecting portion (22) all passes through the screw hole and the pole wall threaded connection of lead screw (21), the lateral wall of second connecting portion (23) cup joints through the pole wall of round mouth and lead screw (21), second connecting portion (23) and the mouth of pipe department fixed connection, the one end of pivot (25) keeping away from lead screw (21) passes connecting pipe (2) and fixedly connected with hand wheel (4), annular piece (3) has been cup jointed on the axle wall of pivot (25), one side of annular piece (3) and the mouth of pipe department fixed connection of connecting pipe (2), fixedly connected with spacing ring (27) on the axle wall of pivot (25), the lateral wall fixed connection of the jar body (1) has the intake pipe, fixedly connected with pneumatic valve (10) on the pipe wall of intake pipe, the one end fixed connection of intake pipe keeping away from jar body (1) has quick-operation joint (11), pressure sensor (32) and gas concentration detection sensor (31) are all fixed in the lower extreme of closing plate (6), the lower extreme inner wall center department of jar body (1) rotates through antifriction bearing and is connected with the back shaft, the upper end fixed connection of back shaft has plectane (16), the upper end of the circular plate (16) is fixedly connected with a lining (15), and the inner side of the lining (15) is uniformly and fixedly connected with a plurality of annular bearing plates (14).

2. The college laboratory hazardous gas leakage prevention device according to claim 1, wherein: the inboard sliding connection of rubber sleeve (35) has a plurality of evenly distributed's arc piece (29), and is a plurality of arc piece (29) are the annular distribution, the lateral wall fixedly connected with flexure strip (30) of arc piece (29), the upper end of flexure strip (30) and the lower extreme fixed connection of closing plate (6).

3. The equipment for preventing hazardous gas leakage in colleges and universities laboratory according to claim 1, characterized in that: the inclined plane has been seted up to one side that annular block (3) are relative with spacing ring (27), fixedly connected with round platform column structure's rubber block (26) on the axle wall of pivot (25), the one end of rubber block (26) is located the inclined plane on annular block (3), the other end of rubber block (26) and one side fixed connection of spacing ring (27), the rectangle through-hole has been seted up to one side of elastic ring (12), and the lateral wall of second connecting portion (23) is run through to one side of rectangle through-hole, cup jointed arc pole (24) in the rectangle through-hole, one end of arc pole (24) and one side fixed connection of first connecting portion (22).