CN112401304A

CN112401304A - Outdoor water injection automatic smoke extinguishing column

Info

Publication number: CN112401304A
Application number: CN202011241506.3A
Authority: CN
Inventors: 杜广君
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-02-26

Abstract

The invention discloses an outdoor water injection automatic smoke extinguishing column, which relates to the technical field of fire fighting devices and comprises a stand column, a base, a water storage box, a water injection pipe, a smoke extinguishing mechanism and a garbage can, wherein the bottom of the stand column is fixedly connected with the top of the base, the top of the stand column is provided with the water storage box, one side of the water storage box is fixedly connected with one end of the water injection pipe, and the other end of the water injection pipe is fixedly connected with the top of the smoke extinguishing mechanism. The invention combines the water storage box, the water injection pipe and the cigarette extinguishing mechanism, realizes the function of automatically separating the new cigarette end from the cigarette end which is extinguished at the bottom, avoids the problem that the cigarette end burns because the new cigarette end which is not extinguished is lost into the old cigarette end accumulated at the bottom, also realizes that water is sprayed into the cigarette end accumulated at the bottom after each cigarette extinguishing, prevents the spontaneous combustion phenomenon of the accumulated inflammable cigarette end in outdoor high-temperature weather, simultaneously realizes the watering and caking treatment of the cigarette ash at the bottom, is more beneficial to the cleaning work of the cigarette extinguishing column, and prevents the generation of flying dust in the cleaning process.

Description

Outdoor water injection automatic smoke extinguishing column

Technical Field

The invention relates to a smoke extinguishing column, relates to the technical field of fire fighting devices, and particularly relates to an outdoor automatic smoke extinguishing column filled with water.

Background

The floor cigarette ends are difficult to clean, and in order to protect the environment and create a civilized city, stainless steel cigarette extinguishing columns are arranged in a specific public area and used for extinguishing cigarettes and collecting the cigarette ends in a unified and centralized manner, and hardware is equipped to guide citizens to form a good habit of not throwing out the sundries of the cigarette ends, so that the large environment of the city is jointly promoted. The following problems exist in the prior art:

1. in the prior art, the cigarette extinguishing column installed in a public place has the problems that cigarette ends are accumulated at the bottom in a concentrated manner, and when new cigarette ends which are not completely extinguished are thrown into the accumulated cigarette ends, the cigarette ends at the bottom are often burnt, waste gas and waste smoke are generated, the environment is polluted, and even fire disasters can be possibly caused;

2. among the prior art, can set up the through-hole to some columns that extinguish, the purpose is in the groove of extinguishing in order to prevent that the cigarette end that does not extinguish continues burning the waste cigarette gathering that produces in the bottom, but the waste cigarette can distribute out the external world through the through-hole, produces and then can not reach the use original intention of extinguishing the column environmental protection, and this column that extinguishes's suitability worsens, consequently need carry out the structure innovation and solve specific problem.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an outdoor automatic extinguishing column by water injection, wherein one purpose is to separate the unextinguished new cigarette ends from the cigarette ends accumulated at the bottom after being extinguished, and solve the problems that the cigarette ends are accumulated at the bottom in a concentrated manner in the extinguishing column installed in public places, and when the new cigarette ends which are not completely extinguished are thrown into the accumulated cigarette ends, the cigarette ends at the bottom are often burnt, waste gas and waste smoke are generated, the environment is polluted and even fire is possibly caused; wherein another kind of purpose can set up the through-hole in order to solve to some columns that extinguish cigarette, the purpose is in order to prevent that the cigarette end that does not extinguish from continuing the waste cigarette gathering that the burning produced in the bottom is in the groove that extinguishes cigarette, but the waste cigarette can distribute out external problem through the through-hole, in order to reach the effect that will extinguish completely after abandoning the cigarette end, wherein another kind of purpose is in order to possess the function of easily washing the clearance, make things convenient for sanitation workman to the work of clearing up of columns that extinguish cigarette, be favorable to beautifying the city appearance, clean environment, solved the cigarette end and piled up the problem that is difficult to the clearance in the bottom of the groove that extinguishes cigarette.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides an outdoor automatic smoke column that goes out of water injection, includes stand, base, water storage box, water injection pipe, goes out cigarette mechanism and garbage bin, the bottom of stand and the top fixed connection of base, the top of stand is provided with the water storage box, one side of water storage box and the one end fixed connection of water injection pipe, the other end of water injection pipe and the top fixed connection of going out cigarette mechanism, the bottom of going out cigarette mechanism is provided with the garbage bin.

The technical scheme of the invention is further improved as follows: the cigarette extinguishing device is characterized in that a placing groove is formed in the top of the stand column, a movable hole is formed in the bottom of the right side of the stand column, a cigarette extinguishing mechanism is movably connected to the upper surface of the placing groove, and a dust pouring hole is formed in the outer wall of the top of the placing groove.

The technical scheme of the invention is further improved as follows: the cigarette extinguishing mechanism comprises a top cover, a cigarette receiving part, a movable rod, a pedal and a pedal spring, the bottom of the top cover is connected with the top of the cigarette receiving part in a clamped mode, a first gear shaft is fixedly connected to the right side of the top cover, a connecting rod is fixedly connected to the right side of the cigarette receiving part, a second gear shaft is fixedly connected to the right side of the connecting rod, first teeth are evenly arranged on the left side of the top of the movable rod, second teeth are evenly arranged on the right side of the bottom of the first teeth, a baffle is fixedly connected to the bottom of the second teeth, the first teeth are meshed with the teeth of the first gear shaft, the second teeth are meshed with the teeth of the second gear shaft, the bottom of the movable rod is fixedly connected with the upper surface of the pedal, the lower surface of the pedal is movably connected with the top of the pedal spring, and the bottom of the pedal spring is fixedly connected with.

The technical scheme of the invention is further improved as follows: the cigarette ash groove has been seted up at the top of top cap, the bottom in cigarette ash groove is provided with deposits the water spare, and the bottom of depositing the water spare is the hemisphere casing, the bottom fixedly connected with water outlet mechanism of depositing the water spare.

The technical scheme of the invention is further improved as follows: connect the right side of cigarette piece to seted up special-shaped groove, and the left side in special-shaped groove sets up inclined plane, the hemisphere groove has been seted up to the bottom in special-shaped groove, the top swing joint in hemisphere groove has spherical ejecting piece.

The technical scheme of the invention is further improved as follows: the water outlet mechanism comprises a shell, a hanging spring, an arc-shaped push plate and a blocking ball, water inlet holes are uniformly formed in the top of the shell, water outlet holes are uniformly formed in the bottom of the shell, the top inner wall of the shell is fixedly connected with the top of the hanging spring, the bottom of the hanging spring is fixedly connected with the top of the arc-shaped push plate, the bottom of the arc-shaped push plate is movably connected with the outer wall of the blocking ball, a moving shaft is inserted in the axis of the blocking ball, and one end of the moving shaft is inserted in the inner wall of the shell.

The technical scheme of the invention is further improved as follows: spherical ejecting piece includes buffer spring, arc roof, metal ball and bearing blade, buffer spring's one end and the inner wall fixed connection in hemisphere groove, buffer spring's the other end and the bottom fixed connection of arc roof, the top of arc roof and the outer wall swing joint of metal ball, the top fixedly connected with fastener of arc roof, the roll groove has been seted up to the outer wall of metal ball, the one end and the inner wall joint in roll groove of fastener, the through-hole has evenly been seted up to the outer wall of metal ball, the inner wall swing joint of metal ball has the bearing blade.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:

1. the invention provides an outdoor automatic water injection smoke extinguishing column, which is ingenious in design and adopts the combination of a top cover, a smoke receiving piece, a movable rod, a pedal and a pedal spring, so that the function of automatically separating a new cigarette end from a cigarette end which is extinguished at the bottom is realized, and the problems that the cigarette end is burnt, waste smoke and waste gas are generated and the environment is polluted because the new cigarette end which is not extinguished completely is thrown into an old cigarette end accumulated at the bottom are avoided.

2. The invention provides an outdoor water injection automatic cigarette extinguishing column, which can realize the extinguishing of a new cigarette end by using water alone through the combination arrangement of a water storage box, a water injection pipe and a cigarette extinguishing mechanism, and can be automatically thrown into a bottom old cigarette end when used next time, so that the new cigarette end is completely ensured to be thrown into a bottom accumulated cigarette end after being extinguished, and the situation that waste cigarettes are generated in the cigarette extinguishing column by the exhausted cigarette end is avoided.

3. The invention provides an outdoor water injection automatic cigarette extinguishing column, which is characterized in that a water storage box, a water injection pipe and a cigarette extinguishing mechanism are combined, so that water is sprayed to cigarette ends accumulated at the bottom after cigarette extinguishing every time, spontaneous combustion of the accumulated inflammable cigarette ends in outdoor high-temperature weather is prevented, and the situation that the cigarette ends are spontaneously combusted to pollute the environment is avoided.

4. The invention provides an outdoor water injection automatic smoke suppression column, which realizes the watering and caking treatment of bottom cigarette ash by adopting the combination arrangement of a water storage box, a water injection pipe and a smoke suppression mechanism, is more beneficial to the cleaning work of the smoke suppression column and prevents flying dust from being generated in the cleaning process.

Drawings

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

FIG. 2 is a schematic structural view of the smoke suppression mechanism of the present invention;

figure 3 is a schematic view of the open smoke suppression mechanism of the present invention;

FIG. 4 is a schematic view of the closure of the lid and the smoke receiver of the present invention;

FIG. 5 is a schematic view of the top cover structure of the present invention;

FIG. 6 is an enlarged view A of FIG. 4;

fig. 7 is an enlarged view of the top structure of the top cover of the present invention.

In the figure: 1. a column; 11. a base; 2. a water storage box; 20. a water injection pipe; 3. a smoke extinguishing mechanism; 4. a trash can; 10. a placement groove; 13. a movable hole; 12. pouring ash holes; 30. a top cover; 31. a cigarette receiving piece; 32. a movable rod; 33. a pedal; 34. a pedal spring; 301. a first gear shaft; 312. a connecting rod; 311. a second gear shaft; 322. a first tooth; 323. a second tooth; 303. a soot groove; 302. a water storage member; 304. a water outlet mechanism; 313. a special-shaped groove; 314. a hemispherical groove; 315. a spherical ejector member; 3041. a housing; 3042. hanging a spring; 3044. an arc-shaped push plate; 3045. blocking the ball; 3043. a water inlet hole; 3047. a water outlet hole; 3046. a movable shaft; 3151. a buffer spring; 3152. an arc-shaped top plate; 3153. a metal ball; 3155. a bearing blade; 3154. and a through hole.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1

As shown in fig. 1, 2, 3 and 5, the invention provides an outdoor water injection automatic smoke extinguishing column, which comprises a vertical column 1, a base 11, a water storage box 2, a water injection pipe 20, a smoke extinguishing mechanism 3 and a garbage can 4, wherein the bottom of the vertical column 1 is fixedly connected with the top of the base 11, the top of the vertical column 1 is provided with the water storage box 2, one side of the water storage box 2 is fixedly connected with one end of the water injection pipe 20, the other end of the water injection pipe 20 is fixedly connected with the top of the smoke extinguishing mechanism 3, the bottom of the smoke extinguishing mechanism 3 is provided with the garbage can 4, the top of the vertical column 1 is provided with a placing groove 10, the right bottom of the vertical column 1 is provided with a movable hole 13, the upper surface of the placing groove 10 is movably connected with the smoke extinguishing mechanism 3, the outer wall of the top of the placing groove 10 is provided with an ash pouring hole 12, the smoke extinguishing mechanism 3 comprises a top cover 30, a smoke receiving piece 31, a movable rod 32, a, first gear shaft 301 of right side fixedly connected with of top cap 30, connect the right side fixedly connected with connecting rod 312 of cigarette piece 31, the right side fixedly connected with second gear shaft 311 of connecting rod 312, the top left side of movable rod 32 evenly is provided with first tooth 322, the bottom right side of first tooth 322 evenly is provided with second tooth 323, the bottom fixedly connected with baffle 321 of second tooth 323, first tooth 322 meshes with the tooth of first gear shaft 301, second tooth 323 meshes with the tooth of second gear shaft 311, the bottom of movable rod 32 and the upper surface fixed connection of footboard 33, the lower surface of footboard 33 and the top swing joint of footboard spring 34, the bottom of footboard spring 34 and the upper surface fixed connection of base 11, ash groove 303 has been seted up at the top of top cap 30.

In this embodiment, when the cigarette needs to be ejected during smoking, the cigarette ash can be ejected into the cigarette ash groove 303 formed on the top of the top cover 30, when the cigarette end needs to be discarded, the pedal 33 is firstly stepped on by feet, the pedal 33 presses the pedal spring 34 and pulls the movable rod 32 to displace downward, when the movable rod 32 displaces downward, the first tooth 322 on the left side and the second tooth 323 on the right side respectively rotate the first gear shaft 301 and the second gear shaft 311, the first gear shaft 301 and the second gear shaft 311 respectively drive the top cover 30 and the cigarette receiving member 31 to rotate and open in opposite directions, the cigarette ash in the cigarette ash groove 303 formed on the top of the top cover 30 is poured into the ash pouring hole 12 on the rear end and finally falls into the garbage can 4 on the bottom, then the cigarette end is discarded into the opened cigarette receiving member 31, the cigarette end is released, then the feet are released, and the movable rod 32 displaces upward to return to the initial position through the rebound action of the pedal spring 34, at the same time, the top cover 30 and the cigarette receiving piece 31 are tightly closed.

Example 2

As shown in fig. 3 to 6, on the basis of embodiment 1, the present invention provides a technical solution: the top of the top cover 30 is provided with a cigarette ash groove 303, the bottom of the cigarette ash groove 303 is provided with a water storage part 302, the bottom of the water storage part 302 is a hemispherical shell, the bottom of the water storage part 302 is fixedly connected with a water outlet mechanism 304, the water outlet mechanism 304 comprises a shell 3041, a hanging spring 3042, an arc-shaped push plate 3044 and a blocking ball 3045, the top of the shell 3041 is uniformly provided with a water inlet 3043, the bottom of the shell 3041 is uniformly provided with a water outlet 3047, the top inner wall of the shell 3041 is fixedly connected with the top of the hanging spring 3042, the bottom of the hanging spring 3042 is fixedly connected with the top of the arc-shaped push plate 3044, the bottom of the arc-shaped push plate 3044 is movably connected with the outer wall of the blocking ball 3045, a moving shaft 3046 is inserted in the shaft center of the blocking ball 3045, one end of the moving shaft 3046 is inserted in the inner wall of the shell 3041, the right side of the cigarette receiving part 31, the top swing joint of hemisphere groove 314 has spherical liftout 315, spherical liftout 315 includes buffer spring 3151, arc roof 3152, metal ball 3153 and bearing vane 3155, buffer spring 3151's one end and hemisphere groove 314's inner wall fixed connection, buffer spring 3151's the other end and arc roof 3152's bottom fixed connection, arc roof 3152's top and metal ball 3153's outer wall swing joint, arc roof 3152's top fixedly connected with fastener, the rolling groove has been seted up to metal ball 3153's outer wall, the one end and the inner wall joint of rolling groove of fastener, through-hole 3154 has evenly been seted up to metal ball 3153's outer wall, metal ball 3153's inner wall swing joint has bearing vane 3155.

In this embodiment, after the cigarette end is discarded in the cigarette receiving member 31, during the process that the top cover 30 is tightly closed and closed with the cigarette receiving member 31, the metal ball 3153 disposed on the upper surface of the inner wall of the cigarette receiving member 31 will make rolling contact with the outer wall of the blocking ball 3045 in the water outlet mechanism 304 disposed at the bottom of the water storage member 302, and push the blocking ball 3045 upwards into the top of the housing 3041, the arc top plate 3152 at the bottom of the metal ball 3153 and the buffer spring 3151 play a role in buffering and supporting the metal ball 3153, so as to prevent the metal ball 3153 from being stuck in the hemispherical groove 314, when the blocking ball 3045 is pushed up by the metal ball 3153, the inserted 3046 in the blocking ball 3045 will move upwards along the inner wall of the housing 3041, open the water outlet 3047 on the side surface, the water flow in the water storage member 302 will flow downwards and enter the inner cavity of the metal ball 3153 through the through hole 3154 at the top of the metal ball 3153, and drive the bearing vane 3155 to rotate, and centrifugal force is generated during the rotation of the bearing vane 31, make things convenient for rivers to flow out metal ball 3153 more fast, the cigarette end of abandoning in the cigarette piece 31 will be connect to the rivers of flowing out metal ball 3153 extinguishes, and when the interior rivers of cigarette piece 31 were full of, the effect rivers balanced by water pressure will no longer flow out from metal ball 3153, and water will be full of the whole cavity that connects between cigarette piece 31 and top cap 30.

When a new cigarette end needs to be discarded next time, the top cover 30 and the cigarette receiving piece 31 are opened through the function of the embodiment 1, and the cigarette end which is extinguished last time and the cigarette soaking water flow the inclined plane on the left side of the cigarette receiving piece 31 into the garbage can 4 at the bottom.

The working principle of the automatic water injection smoke extinguishing column for outdoor use is described in detail below.

As shown in fig. 1-7, when smoke is smoked, the cigarette ash can be ejected into the cigarette ash groove 303 formed on the top of the top cover 30 when the cigarette end needs to be discarded, the pedal 33 is firstly stepped on, the pedal 33 presses the pedal spring 34 and pulls the movable rod 32 to displace downwards, when the movable rod 32 displaces downwards, the first tooth 322 on the left side and the second tooth 323 on the right side respectively rotate the first gear shaft 301 and the second gear shaft 311, the first gear shaft 301 and the second gear shaft 311 respectively drive the top cover 30 and the cigarette receiving member 31 to rotate reversely to open, the cigarette ash in the cigarette ash groove 303 formed on the top of the top cover 30 is poured into the ash pouring hole 12 on the rear end and finally falls into the garbage bin 4 on the bottom, then the cigarette end is discarded into the opened cigarette receiving member 31, the cigarette end is released, the foot is released, and the movable rod 32 returns to the initial position upwards through the rebound action of the pedal spring 34, meanwhile, the top cover 30 and the cigarette receiving member 31 are driven to close tightly, when the cigarette end is discarded in the cigarette receiving member 31, the metal ball 3153 arranged on the upper surface of the inner wall of the cigarette receiving member 31 is in rolling contact with the outer wall of the blocking ball 3045 in the water outlet mechanism 304 arranged at the bottom of the water storing member 302, and pushes the blocking ball 3045 upwards to the top of the shell 3041, the arc top plate 3152 at the bottom of the metal ball 3153 and the buffer spring 3151 play a role in buffering and supporting the metal ball 3153, so as to prevent the metal ball 3153 from being stuck in the hemispherical groove 314, when the blocking ball 3045 is pushed by the metal ball 3153, the inserted 3046 in the blocking ball 3045 moves upwards along the inner wall of the shell 3041, so as to open the water outlet 3047 at the side face, the water flow in the water storing member 302 flows downwards, and enters the cavity 3154 in the metal ball 3153 through the metal ball 3154 at the top of the metal ball 3153, so as to drive the bearing blade 3155 to rotate, and generate centrifugal force to throw the water flow out of the side face 3154 through the metal ball 3153, make things convenient for rivers faster outflow metal ball 3153, the cigarette end that abandons in the cigarette piece 31 will be extinguished to the rivers that flow out metal ball 3153, and when the interior rivers of cigarette piece 31 were full of the back, will no longer flow out from metal ball 3153 by the balanced effect rivers of water pressure, and water will be full of the whole cavity that connects between cigarette piece 31 and top cap 30.

When a new cigarette end needs to be discarded next time, through the effect of the embodiment 1, the top cover 30 is opened and the cigarette receiving piece 31 is opened, the cigarette end which is extinguished last time and cigarette soaking water enable the cigarette to flow into the garbage can 4 at the bottom through the inclined plane at the left side of the cigarette receiving piece 31, after the new cigarette end and the old cigarette end are separated, water can be injected into the new cigarette end to be extinguished completely, the cigarette end is prevented from being accumulated at the bottom and spontaneous combustion due to high temperature is avoided, and meanwhile, subsequent cleaning work can be performed on the garbage can 4 at the bottom conveniently.

The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.

Claims

1. The utility model provides an outdoor automatic smoke column that goes out of water injection, includes stand (1), base (11), water storage box (2), water injection pipe (20), goes out cigarette mechanism (3) and garbage bin (4), its characterized in that: the bottom of stand (1) and the top fixed connection of base (11), the top of stand (1) is provided with water storage box (2), one side of water storage box (2) and the one end fixed connection of water injection pipe (20), the other end of water injection pipe (20) and the top fixed connection of cigarette mechanism (3) go out, the bottom of cigarette mechanism (3) that goes out is provided with garbage bin (4).

2. The outdoor automatic smoke extinguishing column filled with water according to claim 1, characterized in that: the cigarette extinguishing device is characterized in that a placing groove (10) is formed in the top of the stand column (1), a movable hole (13) is formed in the bottom of the right side of the stand column (1), a cigarette extinguishing mechanism (3) is movably connected to the upper surface of the placing groove (10), and a dust pouring hole (12) is formed in the outer wall of the top of the placing groove (10).

3. The outdoor automatic smoke extinguishing column filled with water according to claim 1, characterized in that: the cigarette extinguishing mechanism (3) comprises a top cover (30), a cigarette receiving part (31), a movable rod (32), a pedal (33) and a pedal spring (34), the bottom of the top cover (30) is clamped with the top of the cigarette receiving part (31), the right side of the top cover (30) is fixedly connected with a first gear shaft (301), the right side of the cigarette receiving part (31) is fixedly connected with a connecting rod (312), the right side of the connecting rod (312) is fixedly connected with a second gear shaft (311), the left side of the top of the movable rod (32) is uniformly provided with first teeth (322), the right side of the bottom of the first teeth (32) is uniformly provided with second teeth (323), the bottom of the second teeth (323) is fixedly connected with a baffle plate (321), the first teeth (322) are meshed with the teeth of the first gear shaft (301), and the second teeth (323) are meshed with the teeth of the second gear shaft (311), the bottom of movable rod (32) is connected with the upper surface fixed of footboard (33), the lower surface of footboard (33) and the top swing joint of footboard spring (34), the bottom of footboard spring (34) and the upper surface fixed of base (11) are connected.

4. The outdoor automatic smoke extinguishing column filled with water according to claim 1, characterized in that: the cigarette ash groove (303) has been seted up at the top of top cap (30), the bottom of cigarette ash groove (303) is provided with water storage member (302), and the bottom of water storage member (302) is the hemisphere casing, the bottom fixedly connected with of water storage member (302) goes out water mechanism (304).

5. The outdoor automatic smoke extinguishing column filled with water according to claim 1, characterized in that: connect the right side of cigarette piece (31) to seted up dysmorphism groove (313), and the left side in dysmorphism groove (313) is seted up there is the inclined plane, hemisphere groove (314) have been seted up to the bottom in dysmorphism groove (313), the top swing joint of hemisphere groove (314) has spherical ejecting (315).

6. The outdoor automatic smoke extinguishing column filled with water according to claim 1, characterized in that: the water outlet mechanism (304) comprises a shell (3041), a hanging spring (3042), an arc-shaped push plate (3044) and a blocking ball (3045), wherein water inlet holes (3043) are uniformly formed in the top of the shell (3041), water outlet holes (3047) are uniformly formed in the bottom of the shell (3041), the inner wall of the top of the shell (3041) is fixedly connected with the top of the hanging spring (3042), the bottom of the hanging spring (3042) is fixedly connected with the top of the arc-shaped push plate (3044), the bottom of the arc-shaped push plate (3044) is movably connected with the outer wall of the blocking ball (3045), a moving shaft (3046) is inserted in the axis of the blocking ball (3045), and one end of the moving shaft (3046) is inserted in the inner wall of the shell (3041).

7. The outdoor automatic smoke extinguishing column filled with water according to claim 5, characterized in that: spherical liftout piece (315) includes buffer spring (3151), arc roof (3152), metal ball (3153) and bearing vane (3155), the inner wall fixed connection of one end and hemisphere groove (314) of buffer spring (3151), the bottom fixed connection of the other end and arc roof (3152) of buffer spring (3151), the top and the outer wall swing joint of metal ball (3153) of arc roof (3152), the top fixed connection of arc roof (3152) has the fastener, the rolling groove has been seted up to the outer wall of metal ball (3153), the one end and the inner wall joint in rolling groove of fastener, through-hole (3154) have evenly been seted up to the outer wall of metal ball (3153), the inner wall swing joint of metal ball (3153) has bearing vane (3155).