CN207426613U - Fire-resistant plugging device - Google Patents

Abstract

The utility model is related to a kind of fire-resistant plugging devices, including cylinder, fireproof material layer and string holes adjustment structure, the fireproof material layer is arranged on the inner surface of one end of the cylinder, the string holes adjustment structure is arranged in the cylinder, and the string holes adjustment structure adjusts the openings of sizes of string holes to connect or separate the both ends of the cylinder.The utility model fire-resistant plugging device for temporarily by pipeline flame proof passageway is provided, avoid interim pipeline arrangement destroy fire prevention border integrality, using facility easy to operate, reach fireproof purpose.

Description

Fire blocking device

technical field

The utility model relates to the technical field of fire prevention equipment, in particular to a fire prevention sealing device.

Background technique

With the development of the economy and the advancement of science and technology, as the density of buildings continues to increase, people pay more and more attention to the fire performance of buildings.

The power engineering industry, especially nuclear power plants, often needs to be shut down for maintenance. Maintenance personnel often use a large number of temporary cables during the shutdown period. In the actual maintenance process, most of the fire doors are used as temporary cable passages. Therefore, the fire doors are open for a long time, destroying the original fire prevention function of the fire doors, and the fire hazards are increasing. Once an emergency fire occurs, this It will cause immeasurable losses to high-risk factories such as power plants.

Therefore, there is an urgent need for a fire blocking device that can provide a fire prevention passage for the pipeline passing temporarily to overcome the above-mentioned defects.

Utility model content

Based on this, it is necessary to address the existing technical problems and provide a fireproof sealing device that provides a fireproof passage for temporarily passing pipelines and prevents the arrangement of temporary pipelines from destroying the integrity of the fireproof boundary.

The utility model provides a fireproof sealing device, which comprises a cylinder body, a fireproof material layer and a wire hole adjustment structure, the fireproof material layer is arranged on the inner surface of one end of the cylinder body, and the wire hole adjustment structure is arranged on In the cylinder, the wire hole adjustment structure adjusts the opening size of the wire hole to connect or cut off the two ends of the cylinder, thereby avoiding the arrangement of temporary pipelines from destroying the integrity of the fire protection boundary, and no need for traditional maintenance after threading. Fireproof sealing, easy to use and operate.

Preferably, the fireproof material layer has a cylindrical structure and is sleeved in one end of the cylinder so that the fireproof material layer can better adhere to the cylinder to avoid affecting the passage of pipelines, and the structure is simple and compact.

Preferably, the cylinder body has a first through hole and a second through hole, the fireproof material layer is arranged in the first through hole, and the line hole adjustment structure is arranged in the second through hole, so that each component The fit between them is more compact and the structure is simple.

Preferably, the wire hole adjustment structure includes a rotating part and several adjusting blades, the adjusting blades are arranged at the bottom of the second through hole, and the rotating part is rotatably arranged in the second through hole and drives the The adjusting blades are unfolded or retracted, therefore, the opening size of the line hole can be adjusted according to different diameters and different numbers of pipelines, and the adjustment can be performed only by turning the rotating part, without further fireproof sealing. To achieve the purpose of fire prevention, simple and convenient operation and strong applicability.

Preferably, a first short shaft and a second short shaft are respectively provided on both sides of the regulating blade, and a fixed blind hole pivotally connected with the first short shaft is provided at the bottom of the second through hole, and the rotating The bottom of the component is provided with an arc-shaped first limiting hole, the second short shaft is inserted into the first limiting hole, through the first short shaft, the second short shaft, the fixed blind hole and The ingenious cooperation between the first limiting holes drives the adjustment blades to expand or retract.

Preferably, two third short shafts and a fourth short shaft are respectively provided on both sides of the regulating blade, and the bottom of the second through hole is provided with a bar-shaped groove for sliding insertion of the two third short shafts, The bottom of the rotating part is provided with an arc-shaped second limiting hole, and the fourth short shaft is slidably inserted into the second limiting hole, passing through the third short shaft and the fourth short shaft The ingenious cooperation among the bar-shaped groove and the second limiting hole drives the regulating blade to expand or retract.

Preferably, the edges of the adjusting blades are provided with chamfers, which can effectively avoid scratches on the pipeline by the adjusting blades, and better protect the pipelines.

Preferably, the wire hole adjusting structure further includes a locking structure, the locking structure positions the relative position between the rotating part and the barrel so as to fix the opening size of the wire hole, and can be adjusted by The rotating part is further fixed, which can prevent the rotating part from turning accidentally to open the blades, and can reduce the gap between the wire hole and the pipeline, thereby improving the overall fireproof performance.

Preferably, the locking structure includes a first bolt and a first nut, the side wall of the barrel is provided with an elongated hole, the side wall of the rotating part is provided with a positioning hole, and the first bolt passes through the The elongated hole and the positioning hole are connected with the first nut, and the first nut is connected with the first bolt to clamp or loosen the rotating part and the cylinder, so that the The purpose of fire prevention is well achieved, and the operation is simple and convenient.

Preferably, the locking structure includes a steel belt and a lock, the steel belt covers the outer wall of the rotating part and the outer wall of the barrel, and the lock tightens or loosens the steel belt so that Clamping or loosening the rotating part and the cylinder can better achieve the purpose of fire prevention, and the operation is simple and convenient.

Preferably, the outer wall of the rotating part and the outer wall of the cylinder are provided with grooves, and the steel belt is arranged on the two grooves, so that the steel belt can better fix the rotating part and the The relative position between the cylinders improves the overall fastening effect of the locking structure.

Preferably, the outer wall of the rotating part and the inner wall of the cylinder are provided with threads that cooperate with each other. The provision of the threads is not only convenient for installation but also prevents the rotation due to improper force when adjusting the size of the blade opening. The component is separated from the second through hole due to a relatively large radial displacement.

Preferably, the locking structure includes a second bolt, a second nut, a support ear provided on the side wall of the cylinder, and a rotating ear provided on the side wall of the rotating component, and the rotating ear is provided with an arc one end of the second bolt passes through the arc-shaped hole and is fixed on the support ear, and the other end is mated with the second nut to clamp or loosen the rotating part and the barrel Body, so as to better achieve the purpose of fire prevention, simple and convenient operation.

Preferably, the support ears are provided with fixing holes for connecting to the wall, which is convenient for use.

Preferably, the fire blocking device further includes a sealing cover, which is reversibly arranged and located at the other end of the cylinder to isolate the inside of the cylinder from the outside, and can be used when not in use Directly closing the airtight cover improves airtightness, watertightness and overall fire resistance.

Preferably, the inner side of the sealing cover is provided with a gasket to seal the inside of the cylinder from the outside, and the gasket can further improve the airtightness, watertightness and overall fireproof performance of the plug.

Preferably, the fire blocking device further includes a clamping structure for clamping the sealing cover. By controlling the opening and closing of the sealing cover through the clamping structure, the sealing cover can be closed more tightly to prevent the The airtight lid prevents accidental opening and further improves airtightness, watertightness and overall fire resistance.

Preferably, the clamping structure includes a clamping handle and a clamping piece, the clamping piece is provided with a slot, the clamping handle is pivotally connected to the sealing cover, and the clamping piece is opposite to the barrel The body is fixed, the clamping handle is clamped in the clamping groove, and the sealing cover can be clamped better, the structure is simple and convenient, and it is easy to operate.

Preferably, the clamping structure includes a third bolt, a third nut, a pressing ear fixed on the sealing cover, and a fixing ear fixed on the side wall of the barrel, the pressing ear and the The fixing ears are respectively provided with holes for the passage of the third bolts, and the third bolts pass through the two holes and cooperate with the third nuts to compress the sealing cover, which can be better clamped The sealing cover has a simple and convenient structure and is easy to operate.

The beneficial effects of the utility model are: the fireproof sealing device provided by the utility model, since a cylinder body is provided, a fireproof material layer which expands rapidly in case of fire is arranged at one end of the cylinder body, and a line is set in the cylinder body. Hole adjustment structure, so that it can be adjusted and fixed according to different diameters and different numbers of line holes of the pipeline, and the fireproof sealing device can also be directly closed according to the needs of users. Therefore, through the cylinder body, the fireproof material layer and the line The ingenious combination of the hole adjustment structure provides a fire prevention passage for the pipeline passing through temporarily, avoiding the arrangement of the temporary pipeline from destroying the integrity of the fire boundary. Effectively prevent snakes, rats and other organisms from entering the factory building through temporary pipelines, which plays a role in shielding organisms, improves the fire performance as a whole, and achieves the purpose of effective fire prevention.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the first embodiment of the fireproof sealing device of the present invention.

Fig. 2 is a full sectional view of the first embodiment of the fireproof sealing device of the present invention.

Fig. 3 is a top view of the adjusting vane of the fireproof sealing device of the present invention.

Fig. 4 is a full cross-sectional view of the fireproof sealing device of the present invention when it is used on a wall.

Fig. 5 is a schematic perspective view of the second embodiment of the fire prevention sealing device of the present invention.

Fig. 6 is a half-sectional view of the second embodiment of the fireproof sealing device of the present invention.

Fig. 7 is a three-dimensional structural schematic diagram of the third embodiment of the fire prevention sealing device of the present invention.

Fig. 8 is a full sectional view of the third embodiment of the fire prevention sealing device of the present invention.

Fig. 9 is a full perspective view of the third embodiment of the fireproof sealing device of the present invention.

Fig. 10 is a front view of the third embodiment of the fireproof sealing device of the present invention.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1-2, which shows the first embodiment of the fire blocking device of the present invention. In this embodiment, the fire blocking device 100 includes a cylinder body 1, a fireproof material layer 2 and a line hole adjustment structure 3. The cylinder body 1 is a carbon steel cylinder body with two-stage diameter reduction, and the cylinder body 1 has a second A through hole 11 and a second through hole 12, the inner diameter of the first through hole 11 is smaller than the inner diameter of the second through hole 12, the fireproof material layer 2 is made of a sheet-like fireproof material with a high expansion rate, and It is rolled into a tube and fitted on the inner surface of the first through hole 11. When a fire occurs, the high-expansion fireproof material can quickly expand and block the inside of the cylinder 1 to prevent the fire from passing through, achieving excellent fireproof performance. ; The fireproof material should have a fire resistance limit of not less than 2 hours. The wire hole adjusting structure 3 is fitly connected to the inner surface of the second through hole 12 , and the wire hole adjusting structure 3 adjusts the size of the opening of the wire hole 13 to connect or isolate the two ends of the barrel 1 . More specifically, as follows:

Please refer to Figures 1-3, the wire hole adjusting structure 3 includes a plurality of adjusting blades 31 and a rotating part 32, the number of adjusting blades 31 in this embodiment is 6 to 8, the thickness is 1 to 2mm, and carbon steel is used sheet, cast steel sheet or alloy steel sheet material; the regulating blade 31 is in the shape of a fan blade with chamfers on the edge, which can effectively avoid the phenomena such as the regulating blade 31 scratching the pipeline and better protect the pipeline. A first short shaft 311 and a second short shaft 312 are respectively provided on both sides of the adjusting blade 31, and the bottom of the second through hole 12 is provided with a fixed blind hole 14 pivotally connected with the first short shaft 311, The rotating part 32 has a cylindrical structure and is sleeved in the second through hole 12. The bottom of the rotating part 32 is provided with a strip-shaped first limiting hole 321. The first limiting hole 321 is an arc structure, the second short shaft 312 is plugged into the first limiting hole 321, the rotation of the rotating part 32 drives the rotation of the first limiting hole 321, thereby driving the first limiting hole 321 The two short shafts 312 rotate around the first short shaft 311 , and the different rotation degrees of the regulating blades 31 correspond to different opening sizes of the wire holes 13 .

Further, please refer to Fig. 1-2, the wire hole adjustment structure 3 also includes a locking structure 33, the locking structure 33 includes a first bolt 331 and a first nut 332, the side wall of the barrel 1 is provided with There is an elongated hole 334, the side wall of the rotating part 32 is provided with a positioning hole 333, the first bolt 331 passes through the elongated hole 334 and the positioning hole 333 and is connected with the first nut 332, so The first nut 332 cooperates with the first bolt 331 to clamp or loosen the rotating part 32 and the barrel 1 .

At the same time, in this embodiment, please refer to Figures 1, 2 and 4, the fire blocking device 100 also includes a sealing cover 4, and the sealing cover 4 is connected to the cylinder body 1 through a bolt so that the sealing The cover 4 is reversibly connected to the other end of the cylinder 1 to isolate the inside of the cylinder 1 from the outside world, and a clamping structure 5 is arranged between the sealing cover 4 and the cylinder 1, The clamping structure 5 includes a clamping handle 511 and a clamping member 512, the clamping member 512 is provided with a clamping groove 513, the clamping handle 511 is pivotally connected to the sealing cover 4, and the pivot axis is vertical Set on the surface of the sealing cover 4, the clamping member 512 is fixed relative to the cylinder body 1, the clamping handle 511 is clamped in the clamping groove 513 to clamp the sealing cover 4, the The locking handle 511 withdraws from the locking groove 513 by rotating, so that the sealing cover 4 is opened. A gasket 6 is arranged between the sealing cover 4 and the cylinder body 1 , and the gasket 6 is arranged inside the sealing cover 4 . The gasket 6 is made of organic rubber material with at least B1 fire resistance level, which can further improve the airtightness, watertightness and overall fireproof performance of the plugging.

Please refer to Figures 1, 2 and 4. When in use, install the fireproof sealing device 100 of the present invention on both sides of the wall 300, the user opens the sealing cover 4, loosens the locking structure 33, and rotates the For the rotating part 32, different degrees of rotation correspond to different opening sizes of the wire holes 13. The pipeline 400 enters the factory building through the second through hole 12, the wire hole 13 and the first through hole 11 of the cylinder body 1. Therefore, the user The opening size of the wire hole 13 is adjusted according to different diameters and different numbers of pipelines; after the adjustment is completed, the wire hole 13 clamps the pipeline, and the user locks the locking structure 33 . When encountering a fire, the fireproof material layer 2 will rapidly expand to block the inside of the cylinder 1 so as to block the passage of the fire. After use, the pipeline 400 is removed from the fireproof sealing device 100, and the user adjusts and closes the line hole 13 and closes and locks the sealing cover 4, so as to achieve fireproof, airtight, watertight, etc. multiple effects.

Since the utility model is provided with a cylinder body 1, a fire-proof material layer 2 that expands rapidly in case of fire is arranged at one end of the cylinder body 1, and a wire hole adjustment structure 3 is arranged in the cylinder body 1, so that the pipeline can be adjusted according to the Wire holes with different diameters and different numbers are adjusted and fixed, and the fireproof sealing device can also be directly closed according to the needs of users. Therefore, through the cylinder body 1, fireproof material layer 2 and wire hole adjustment structure Ingenious combination provides fire protection passages for temporary passing pipelines, avoiding the layout of temporary pipelines from destroying the integrity of the fire protection boundary, and no need for traditional fire protection sealing after threading, easy to use and convenient to operate, and can effectively avoid snakes and rats Such organisms enter the factory building through temporary pipelines, which play a role in shielding organisms, improve the fire performance as a whole, and achieve the purpose of effective fire prevention.

Please refer to Fig. 5-6, which shows the second embodiment of the fire blocking device of the present invention. In the fire blocking device 200 of this embodiment, the structure of the cylinder body 1' and the fireproof material layer 2' is the same as that of the first embodiment, the difference lies in the difference of the line hole adjustment structure 3' as follows: In this embodiment Among them, the locking structure 33' includes a steel belt 331' and a lock 332', the rotating part 32' is set in the second through hole 12', and the outer wall of the lower part of the rotating part 32' and the The inner wall of the cylinder 1' is provided with threads that cooperate with each other; the provision of the threads is not only convenient for installation, but also prevents the rotating part 32' from producing a large radial direction due to improper force when adjusting the opening size of the blade 31'. Displaced and separated from the second through hole 12'. The upper edge of the rotating part 32' protrudes from the upper end of the cylinder 1' and the outer wall is flush with the outer wall of the cylinder 1'; the upper outer wall of the rotating part 32' and the outer wall of the cylinder 1' The outer wall is provided with a groove 333 ′, the steel belt 331 ′ surrounds and covers the groove 333 ′, and the lock 332 ′ tightens or loosens the steel belt 331 ′ so that the rotating part 32 ' and the relative position between the barrel 1' to fix the opening size of the wire hole 13'.

Please refer to Fig. 5-6, in this embodiment, the connection relationship of the sealing cap is different from that of the first embodiment, the sealing cap 4 of the first embodiment is connected with the cylinder body 1, and the sealing cap 4' of this embodiment It is connected with the rotating part 32' through a bolt, and the sealing cover 4' closes the wire hole adjustment structure 3' by turning over, thereby isolating the inside of the cylinder 1' from the outside world, and the sealing cover 4' A clamping structure 5' is provided between the wire hole adjustment structure 3', the clamping structure 5' includes a clamping handle 511' and a clamping part 512', and the clamping part 512' is provided with a card slot 513', the clamping handle 511' is pivotally connected to the sealing cover 4', the clamping member 512' is fixed on the edge of the rotating part 32', and the clamping handle 511' is clamped on the The clamping handle 511' exits the clamping slot 513' through rotational movement, so that the sealing cover 4' is opened. A gasket 6' is arranged between the sealing cover 4' and the rotating part 32', and the gasket 6' is arranged inside the sealing cover 4'. The function of each component of the fireproof sealing device 200 in this embodiment is basically the same as that of the corresponding component in the first embodiment, and the overall technical effect is also the same, and will not be repeated here.

Please refer to Fig. 7-8, which shows the third embodiment of the fire blocking device of the present invention. In the fireproof sealing device 300 of this embodiment, the structure of the cylinder body 1 ″ and the fireproof material layer 2 ″ is the same as that of the first embodiment, the difference lies in the line hole adjustment structure 3 ″, and the differences are as follows: In this embodiment In an example, the locking structure 33" includes a second bolt 331", a second nut 332", a supporting ear 333" and a rotating ear 334", and the supporting ear 333" is welded on the side wall of the cylinder 1". The rotating ear 334" is welded on the side wall of the rotating part 32, and the rotating ear 334" cooperates with the second bolt 331" to open an arc-shaped hole 335", and one end of the second bolt 331" passes through the The arc-shaped hole 335" is fixed on the support ear 333", and the other end is mated with the second nut 332", so as to clamp or loosen the rotating part 32" and the cylinder 1". The supporting ears 333" are provided with fixing holes 336" for connecting to the wall. Please refer to Figures 8-9, two third short shafts 313" and one fourth short shaft 314" are respectively provided on both sides of the regulating blade 31", and the bottom of the second through hole 12" is provided with two The third short shaft 313 "slidably inserts the strip groove 15", the strip groove 15" is a straight groove, and the bottom of the rotating part 32" is provided with an arc-shaped second limiting hole 321", The fourth short shaft 314" is slidably inserted into the second limiting hole 321", and the rotation of the rotating component 32" drives the rotation of the second limiting hole 321", thereby driving the first The four short shafts 314" slide in the second limiting hole 321", and the two third short shafts 313" of the regulating blade move in the strip groove 15" to realize the opening of the regulating blade 31". Together, the different degrees of rotation of the regulating blade 31" correspond to different opening sizes of the wire holes 13".

Please refer to Fig. 10, in this embodiment, there are differences between the clamping structure 5" of the sealing cover 4" and the first embodiment, the differences are as follows: the clamping structure 5" includes a third bolt 511", a third Nut 512", pressing ear 513" and fixing ear 514", the pressing ear 513" is welded on the sealing cover 4", and the fixing ear 514" is welded on the side wall of the cylinder 1". The pressing ear 513" and the fixing ear 514" are respectively provided with holes (not shown) for the third bolt 511" to pass through, and the third bolt 511" passes through the two holes (not shown). ) and cooperate with the third nut 512 "to compress the sealing cover 4 ". The function of each component of the fireproof sealing device 300 of this embodiment is basically the same as that of the corresponding component of the first embodiment , the overall technical effect produced is also the same, and will not be repeated here.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (19)

1. a kind of fire-resistant plugging device, it is characterised in that：It is described anti-including cylinder, fireproof material layer and string holes adjustment structure Fiery material layer is arranged on the inner surface of one end of the cylinder, and the string holes adjustment structure is arranged in the cylinder, described String holes adjustment structure adjusts the openings of sizes of string holes to connect or separate the both ends of the cylinder.

2. fire-resistant plugging device according to claim 1, it is characterised in that：The fireproof material layer is cylindrical in shape structure, and It is socketed in one end of the cylinder.

3. fire-resistant plugging device according to claim 1, it is characterised in that：The cylinder is logical with first through hole and second Hole, the fireproof material layer are arranged at the first through hole, and the string holes adjustment structure is arranged at second through hole.

4. fire-resistant plugging device according to claim 3, it is characterised in that：The string holes adjustment structure includes rotary part With several regulation blades, the regulation blade is arranged at the bottom of second through hole, and the rotary part is rotatably arranged in In second through hole and the regulation blade is driven to be unfolded or pack up.

5. fire-resistant plugging device according to claim 4, it is characterised in that：The both sides of the regulation blade are respectively arranged with First short axle and the second short axle, the bottom of second through hole are equipped with the fixation blind hole with first short axle pivot joint, the rotation The bottom of rotation member is equipped with the first arc-shaped limit hole, and second short axle is plugged in first limit hole.

6. fire-resistant plugging device according to claim 4, it is characterised in that：The both sides of the regulation blade are respectively arranged with Two the 3rd short axles and the 4th short axle, the bottom of second through hole are equipped with the bar-shaped trough for two the 3rd short axle sliding plugs, The bottom of the rotary part is equipped with the second arc-shaped limit hole, and the 4th short axle sliding plug is in second limit hole In.

7. fire-resistant plugging device according to claim 4, it is characterised in that：The edge of the regulation blade is provided with down Angle.

8. fire-resistant plugging device according to claim 4, it is characterised in that：The string holes adjustment structure further includes locking knot Structure, the locking mechanism are positioned so that the relative position between the rotary part and the cylinder the fixed string holes Openings of sizes.

9. fire-resistant plugging device according to claim 8, it is characterised in that：The locking mechanism includes the first bolt and the One nut, the side wall of the cylinder are equipped with elongated hole, and the side wall of the rotary part is equipped with location hole, and first bolt passes through The elongated hole and the location hole are connected with first nut, and first nut is connected with first bolt, To clamp or unclamp the rotary part and the cylinder.

10. fire-resistant plugging device according to claim 8, it is characterised in that：The locking mechanism includes steel band and lock, The steel band is coated on the outer wall of the rotary part and the outer wall with the cylinder, and the steel band is tightened or loosened to the lock So as to clamp or unclamp the rotary part and the cylinder.

11. fire-resistant plugging device according to claim 10, it is characterised in that：The outer wall of the rotary part and with it is described The outer wall setting of cylinder is fluted, and the steel band is arranged on two grooves.

12. fire-resistant plugging device according to claim 10, it is characterised in that：The outer wall of the rotary part and the cylinder The inner wall of body is provided with the screw thread of mutual cooperation.

13. fire-resistant plugging device according to claim 8, it is characterised in that：The locking mechanism includes the second bolt, the Two nuts, the support ear arranged on the cylinder lateral wall and the rotation ear arranged on the rotary part side wall, the rotation ear are set There is an arcuate socket, one end of second bolt through the arcuate socket and is fixed on the support ear, the other end and described the Two nuts are connected, to clamp or unclamp the rotary part and the cylinder.

14. fire-resistant plugging device according to claim 13, it is characterised in that：It is provided with to connect on the support ear The mounting hole of wall.

15. fire-resistant plugging device according to claim 1, it is characterised in that：The fire-resistant plugging device further includes sealing Lid, the sealing cover in turnablely setting and positioned at the other end of the cylinder, by the inside of the cylinder and the external world every From.

16. fire-resistant plugging device according to claim 15, it is characterised in that：The inside of the sealing cover is described equipped with making The inside of cylinder and the gasket of extraneous sealing.

17. fire-resistant plugging device according to claim 15, it is characterised in that：The fire-resistant plugging device further includes clamping The clamping structure of the sealing cover.

18. fire-resistant plugging device according to claim 17, it is characterised in that：The clamping structure include clamping handle and Fastener, the Fastener offer card slot, and the clamping handle is articulated on the sealing cover, and the Fastener is relatively described Cylinder is fixed, and the clamping handle is fastened in the card slot.

19. fire-resistant plugging device according to claim 17, it is characterised in that：The clamping structure include the 3rd bolt, 3rd nut, the compression ear being fixed on the sealing cover and the fixed ear for being fixed on the cylinder lateral wall, the compression ear With the fixed ear be respectively equipped with for the 3rd bolt by hole, the 3rd bolt is through described in two Kong Bingyu the Three nuts coordinate, to compress the sealing cover.