CN210497590U - Fall-preventing mechanism of ventilation cabinet - Google Patents
Fall-preventing mechanism of ventilation cabinet Download PDFInfo
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- CN210497590U CN210497590U CN201920614731.3U CN201920614731U CN210497590U CN 210497590 U CN210497590 U CN 210497590U CN 201920614731 U CN201920614731 U CN 201920614731U CN 210497590 U CN210497590 U CN 210497590U
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- spring
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Abstract
The utility model discloses a fume chamber prevent falling mechanism in the technical field of experimental facilities, including the belt clamp that is used for connecting the hold-in range, the outside one side fixedly connected with top shoe of belt clamp, be equipped with at least one connecting axle in the top shoe slidable, the lower part threaded connection of connecting axle has the lower slider, the upper portion of connecting axle is connected with stop nut, the cover is equipped with spacing spring on the connecting axle between the upside of upper slider and the downside of stop nut, before the hold-in range breaks, spacing spring is in compression state, fixedly connected with prevents weighing down the cover on the lower slider, prevent weighing down the cover and be equipped with the anti-weighing down axle that can stretch out outward in preventing weighing down; the utility model discloses simple structure, can be ingenious prevent that the floating gate from falling, fail safe nature is high.
Description
Technical Field
The utility model belongs to the technical field of experimental facilities, in particular to fume chamber prevent mechanism of falling.
Background
In a research place such as a hospital, a school, various research institutes and the like, experimental research is frequently required, air pollution in a laboratory is often caused due to the use of various chemical substances in the laboratory, and some substances are bad in taste and harmful to health, so that the experimental research is required to be carried out by adopting a fume hood. Ordinary fume chamber main part is a box, sets up air exhaust passageway and tonifying wind passageway on the box, arranges experimental facilities in the box of fume chamber during the use to can discharge harmful gas.
The structure that the floating gate of drive fume chamber goes up and down is chain sprocket structure usually, the chain is connected on the sprocket, chain one end down is connected with the floating gate, the other end that the chain is down is connected with the balancing weight, when no external force is applyed on the floating gate, the floating gate can not remove under the effect of balancing weight, when the exogenic action is on the floating gate, the floating gate rises or descends, when the floating gate goes up and down, can have the condition existence of chain snap, when the chain fracture, the floating gate descends fast under the dead weight effect, injure the operating personnel of floating gate below by a crashing object, the security is not high.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model discloses an overcome the weak point among the above-mentioned prior art, solve the not high technical problem of security among the prior art, provide a fume chamber prevent falling mechanism, the utility model discloses simple structure can be ingenious prevent that the floating gate from falling, and fail safe nature is high.
The purpose of the utility model is realized like this: the utility model provides a fume chamber prevent mechanism of falling, is including the belt clamp that is used for connecting the hold-in range, belt clamp one side fixedly connected with top shoe outwards, be equipped with at least one connecting axle in the top shoe slidable, the lower part threaded connection of connecting axle has lower slider, and the upper portion of connecting axle is connected with stop nut, the cover is equipped with spacing spring on the connecting axle between stop nut's downside and the upside of top shoe, before the hold-in range fracture, spacing spring is in compression state, fixedly connected with prevents weighing down the cover that falls on the slider down, prevent weighing down to fall to be equipped with in the cover and can outwards stretch out prevent weighing down the axle that falls.
In the utility model, one end of the synchronous belt is connected with the belt buckle, the other end of the synchronous belt is connected with the balancing weight, the lower sliding block is fixedly connected with the movable door, and when no external force is applied on the movable door, the movable door is kept still under the action of the balancing weight; the utility model is arranged in the door frame, the inside of the door frame is fixedly connected with a track, and the upper slide block and the lower slide block can move up and down along the track in the height direction; when the synchronous belt is not broken, the limiting spring is in a compressed state, when the synchronous belt is broken, the balancing weight and the lower sliding block are separated from a connected state, the lower sliding block and the movable door move downwards together under the action of gravity, the limiting spring pops out, the anti-falling shaft extends outwards, and when the anti-falling shaft is clamped on the track, the lower sliding block cannot move downwards continuously, the movable door also stops moving downwards, and the anti-falling of the movable door is realized; can be applied to the falling prevention work of the movable door of the fume chamber.
In order to realize the anti-falling function, the belt buckle and the upper sliding block are connected together through a fixing screw, one end of a steel wire rope is connected to the fixing screw, the other end of the steel wire rope is connected with an anti-falling shaft, an installation groove is formed in the anti-falling shaft extending into the anti-falling sleeve, an anti-falling spring is arranged in the installation groove, one end of the anti-falling spring is abutted against the inner side of the anti-falling sleeve, which is opposite to the anti-falling shaft, the other end of the anti-falling spring is abutted against the anti-falling shaft, and the anti-; before the synchronous belt is broken, the steel wire rope tensions the anti-falling shaft to enable the anti-falling spring to be in a compressed state, and the anti-falling shaft is arranged in the anti-falling sleeve; in the design, when the synchronous belt is broken, the balancing weight is disconnected with the lower sliding block, the lower sliding block and the movable door move downwards together under the action of gravity, the limiting spring pops out, the lower sliding block pulls the connecting shaft to move downwards, the limiting nut provides downward force to the upper sliding block, the upper sliding block moves downwards, the speed of the lower sliding block just moving downwards is higher than the speed of the upper sliding block moving downwards, the steel wire rope loosens, the anti-falling spring pops out, the anti-falling shaft pops out outwards under the action of the anti-falling spring, the anti-falling shaft is clamped on the rail, the lower sliding block does not move downwards any.
In order to further prevent falling of the sliding door when the synchronous belt is broken, a plurality of anti-falling holes are distributed on the track, and the anti-falling shaft can be clamped on the track just through the anti-falling holes when extending outwards.
In order to further improve the sliding stability of the upper sliding block and the lower sliding block, the lower sliding block is rotatably connected with a rolling wheel, the rolling wheel can roll along a track, and the track is fixedly connected to the doorframe.
Drawings
Fig. 1 is a front view of the three-dimensional structure of the present invention.
Fig. 2 is a first perspective view of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a second perspective view of the present invention.
Fig. 5 is a three-dimensional structure diagram of the upper and lower sliding blocks of the present invention.
Fig. 6 is a view from direction B-B of the present invention.
Fig. 7 is a structural diagram of the connection between the falling-preventing sleeve and the falling-preventing shaft of the utility model.
Fig. 8 is a view from direction C-C in fig. 7.
The anti-falling device comprises a mounting hole II 1, a mounting hole I2, an anti-falling hole 3, a track 4, an anti-falling sleeve 5, a lower sliding block 6, a connecting shaft 7, a limiting nut 8, a limiting spring 9, an upper sliding block 10, a fixing screw 11, a hanging shaft 12, a steel wire rope 13, a belt buckle 14, a sliding groove 15, a rolling wheel 16, an anti-falling shaft 17, an anti-falling spring 18 and a mounting groove 19.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1-8, the anti-falling mechanism of the ventilation hood comprises a belt buckle 14 for connecting a synchronous belt, an upper slide block 10 is fixedly connected to one outward side of the belt buckle 14, two sliding grooves 15 are formed in the upper slide block 10, two connecting shafts 7 are arranged in the upper slide block 10, the upper portion of each connecting shaft 7 is an optical axis, the upper portion of each connecting shaft 7 can slide in the corresponding sliding groove 15, a lower slide block 6 is connected to the lower portion of each connecting shaft 7 through threads, a limiting nut 8 is connected to the upper portion of each connecting shaft 7, a limiting spring 9 is sleeved on the connecting shaft 7 between the lower side of each limiting nut 8 and the upper side of the corresponding upper slide block 10, before fracture of the synchronous belt, the limiting spring 9 is in a compression state, an anti-falling sleeve 5 is fixedly connected to the lower slide block 6.
In order to realize the anti-falling function, the belt buckle 14 is connected with the upper sliding block 10 through a fixing screw 11, one end of a steel wire rope 13 is connected onto the fixing screw 11, the other end of the steel wire rope 13 is connected with an anti-falling shaft 17, an installation groove 19 is formed in the anti-falling shaft 17 extending into the anti-falling sleeve 5, an anti-falling spring 18 is arranged in the installation groove 19, one end of the anti-falling spring 18 abuts against the inner side, opposite to the anti-falling shaft 17, of the anti-falling sleeve 5, the other end of the anti-falling spring 18 abuts against the anti-falling shaft 17, and the anti-falling shaft 17 can slide in the anti; before the synchronous belt is broken, the steel wire rope 13 tensions the anti-falling shaft 17 to enable the anti-falling spring 18 to be in a compressed state, and the anti-falling shaft 17 is arranged in the anti-falling sleeve 5; a plurality of anti-falling holes 3 are distributed on the track 4, and the anti-falling shaft 17 can be just clamped on the track 4 through the anti-falling holes 3 when extending outwards; the lower sliding block 6 is rotatably connected with a rolling wheel 16, the rolling wheel 16 can roll along the track 4, the track 4 is fixedly connected with the doorframe, and the rolling wheel 16 is arranged between the anti-falling sleeve 5 and the belt buckle 14.
In order to facilitate the installation of the movable door, one side of the lower sliding block 6, which is arranged opposite to the movable door, is fixedly connected with two hanging shafts 12 which are arranged at intervals in the height direction, the lower sliding block is connected with the movable door through the hanging shafts 12, meanwhile, the lower part of the lower sliding block 6 is provided with a first mounting hole 2, the lower part of the track 4 is provided with a second mounting hole 1, and the first mounting hole 2 and the second mounting hole 1 can be coaxial; when the movable door is installed, the lower sliding block 6 is pulled down to a proper installation position, the positioning pin penetrates through the first installation hole 2 and the second installation hole 1 to enable the lower sliding block 6 to be kept still, the movable door and the hanging shaft 12 are fixedly installed together, and after the installation is finished, the positioning pin is pulled out, so that the movable door is convenient to install; when the movable door is detached, the movable door is firstly moved downwards to a proper position, the positioning pin penetrates through the first mounting hole 2 and the second mounting hole 1, the lower sliding block 6 is kept still, the movable door is detached from the hanging shaft 12, and the movable door is convenient to detach.
In the utility model, one end of the synchronous belt is connected with the belt buckle 14, the other end of the synchronous belt is connected with the balancing weight, the balancing weight tensions the upper slide block 10 through the synchronous belt, the lower slide block 6 is fixedly connected with the movable door, and the movable door is kept still under the action of the balancing weight when no external force is applied on the movable door; the utility model is arranged in a door frame, a track 4 is fixedly connected in the door frame, and an upper sliding block 10 and a lower sliding block 6 can move up and down along the track 4 in the height direction; when the synchronous belt is not broken, the balancing weight tensions the upper sliding block 10 through the synchronous belt, the steel wire rope 13 tensions the anti-falling shaft 17 to enable the anti-falling spring 18 to be in a compressed state (as shown in figure 8), the anti-falling shaft 17 is in the anti-falling sleeve 5, the limiting spring 9 is also in a compressed state, when the synchronous belt is broken, the balancing weight is separated from the lower sliding block 6, the lower sliding block and the movable door move downwards together under the action of gravity, the limiting spring 9 pops out, the lower sliding block 6 pulls the connecting shaft 7 to move downwards, the limiting nut 8 gives the downward force to the upper sliding block 10, the upper sliding block 10 moves downwards, the speed of the lower sliding block 6 just moving downwards is greater than the speed of the upper sliding block 10 moving downwards, the steel wire rope 13 is loosened, the anti-falling spring 18 pops out, the anti-falling shaft 17 pops outwards under the action of the anti-falling spring 18, and when the, the lower sliding block 6 does not move downwards any more, and the movable door also stops moving downwards, so that falling prevention of the movable door is realized (the structural schematic diagram of the limiting spring 9 when being ejected is shown in the attached drawings 1 and 2); the utility model has simple structure, skillfully prevents the falling of the movable door when the synchronous belt is broken, and improves the safety and reliability; can be applied to the falling prevention work of the movable door of the fume chamber.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (4)
1. The utility model provides a fume chamber prevent mechanism of falling, a serial communication port, including the belt clamp that is used for connecting the hold-in range, belt clamp one side fixedly connected with top shoe outwards, be equipped with at least one connecting axle in the top shoe slidable, the lower part threaded connection of connecting axle has lower slider, and the upper portion of connecting axle is connected with stop nut, the cover is equipped with stop spring on the connecting axle between stop nut's downside and the upside of top shoe, before the hold-in range fracture, stop spring is in compression state, fixedly connected with prevents weighing down the cover down on the slider down, prevent weighing down that it can outwards stretch out to be equipped with in the cover and prevent weighing down the axle.
2. The anti-falling mechanism of the ventilation cabinet as claimed in claim 1, wherein a track is fixedly connected in the door frame, the belt buckle is connected with the upper slide block through a fixing screw, one end of a steel wire rope is connected to the fixing screw, the other end of the steel wire rope is connected with the anti-falling shaft, an installation groove is formed in the anti-falling shaft extending into the anti-falling sleeve, an anti-falling spring is arranged in the installation groove, one end of the anti-falling spring abuts against the inner side of the anti-falling sleeve, which is opposite to the anti-falling shaft, the other end of the anti-falling spring abuts against the anti-falling shaft, and the anti-falling shaft can slide in the; before the synchronous belt is broken, the steel wire rope tensions the anti-falling shaft to enable the anti-falling spring to be in a compressed state, and the anti-falling shaft is arranged in the anti-falling sleeve.
3. The anti-falling mechanism of the fume hood as claimed in claim 2, wherein the rail is provided with a plurality of anti-falling holes, and the anti-falling shaft can be clamped on the rail just through the anti-falling holes when extending outwards.
4. A fall arrest mechanism for a fume hood according to claim 2 or 3, wherein the lower slider is rotatably connected to rolling wheels which roll along the rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614731.3U CN210497590U (en) | 2019-04-30 | 2019-04-30 | Fall-preventing mechanism of ventilation cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614731.3U CN210497590U (en) | 2019-04-30 | 2019-04-30 | Fall-preventing mechanism of ventilation cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210497590U true CN210497590U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920614731.3U Active CN210497590U (en) | 2019-04-30 | 2019-04-30 | Fall-preventing mechanism of ventilation cabinet |
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| Country | Link |
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| CN (1) | CN210497590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117718302A (en) * | 2023-12-13 | 2024-03-19 | 北京国马斯尔福实验室设备有限责任公司 | Fume chamber window anti-falling device |
-
2019
- 2019-04-30 CN CN201920614731.3U patent/CN210497590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117718302A (en) * | 2023-12-13 | 2024-03-19 | 北京国马斯尔福实验室设备有限责任公司 | Fume chamber window anti-falling device |
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