CN113248043A

CN113248043A - Environment-friendly wastewater treatment device

Info

Publication number: CN113248043A
Application number: CN202110530432.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-08-13

Abstract

The invention discloses an environment-friendly wastewater treatment device which comprises a treatment ball, wherein a feed inlet is formed in the top of the treatment ball, a communicating pipe is connected to the inner wall of the feed inlet in a sliding manner, the top of the communicating pipe extends to the outside of the feed inlet and is fixedly connected with a driving belt pulley, the top of the inner wall of the communicating pipe is rotatably connected with a feed pipe through a bearing, the bottom of the feed pipe penetrates through and is fixedly connected with a fine filtration device, the bottom of the fine filtration device penetrates through and is in threaded connection with a coarse filtration device, the bottom of the treatment ball is communicated with a discharge outlet, the treatment ball comprises an upper hemispherical shell and a lower hemispherical shell, the feed inlet is formed in the upper hemispherical shell, and the discharge outlet is formed in the lower hemispherical shell. This environmental protection effluent treatment plant can realize continuous processing, and the treatment effeciency is higher, need not to set up the reaction tank, and occupation space is less to handle more convenient, uses safe and reliable, convenient maintenance, and stability and adaptability are better.

Description

Environment-friendly wastewater treatment device

Technical Field

The invention relates to the technical field of environmental protection, in particular to an environmental-friendly wastewater treatment device.

Background

Environmental protection, which is called environmental protection in its entirety, refers to the collective name of various actions that human beings take to solve real or potential environmental problems, coordinate the relationship between human beings and the environment, and guarantee the sustainable development of economy and society. The method and means of the method are engineering, administrative, innovative and researched, legal, economic, propaganda and education and the like.

The existing method for treating wastewater in environmental protection engineering usually adopts a precipitation and filtration method to carry out primary treatment on the wastewater, and the treatment method needs to arrange a precipitation tank and a treatment tank, so that the occupied space is more, the precipitation process is long in time consumption, and the treatment efficiency is lower.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an environment-friendly wastewater treatment device, which solves the problems that the wastewater treatment in the current environment-friendly engineering usually adopts a precipitation and filtration method to carry out primary treatment, the treatment mode needs to be provided with a precipitation tank and a treatment tank, the occupied space is large, the precipitation process consumes a long time, and the treatment efficiency is low.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: an environment-friendly wastewater treatment device comprises a treatment ball, wherein a feed inlet is formed in the top of the treatment ball, a communicating pipe is connected to the inner wall of the feed inlet in a sliding manner, the top of the communicating pipe extends to the outside of the feed inlet and is fixedly connected with a driving belt pulley, the top of the inner wall of the communicating pipe is rotatably connected with a feed pipe through a bearing, the bottom of the feed pipe penetrates through and is fixedly connected with a fine filtration device, the bottom of the fine filtration device penetrates through and is in threaded connection with a coarse filtration device, and the bottom of the treatment ball is communicated with a discharge outlet;

the treatment ball comprises an upper hemispherical shell and a lower hemispherical shell, the feed inlet is formed in the upper hemispherical shell, the discharge outlet is formed in the lower hemispherical shell, the driving belt wheel is connected with external driving equipment during use, the driving belt wheel rotates to drive the communicating pipe to rotate, the communicating pipe drives the fine filtering device to rotate, wastewater is discharged into the fine filtering device from the feed pipe, the fine filtering device rotates to drive the wastewater to rotate, the wastewater is discharged into the treatment ball from the fine filtering device through centrifugal force, then the wastewater is discharged through the discharge outlet, continuous treatment can be achieved, wastewater filtration can be accelerated through the centrifugal force, and treatment efficiency is high.

Preferably, the fine filtering device comprises a filtering spherical shell, a first filtering screen cylinder penetrates through and is fixedly connected with the top of the filtering spherical shell, a partition plate is fixedly connected to the outer side of the first filtering screen cylinder, one end of the side surface of the partition plate is rotatably connected with a guide plate through a rotating bolt, one end of the guide plate, far away from the rotating bolt, is rotatably connected with an arc spring piece, one end of the arc spring piece, far away from the guide plate, is rotatably connected with the side surface of the partition plate, a containing chute is formed in the part, close to the guide plate, of the side surface of the partition plate, one side of the partition plate, far away from the guide plate, is fixedly connected with a material injection device, the fine filtering device is arranged, when wastewater enters the fine filtering device, the wastewater respectively enters each space separated by the partition plate, the wastewater entering the separated space is close to the direction of the material injection device under the pushing of the guide plate, and the wastewater is convenient to better contact with the material injection device, so that the material injection of the material injection device is more uniform.

Preferably, the top of the filtering spherical shell is communicated with the bottom of the communicating pipe, one end of the separating plate, which is far away from the first filtering screen cylinder, is fixedly connected with the inner wall of the filtering spherical shell, and the guide plate and the material injection device are both provided with a plurality of groups.

Preferably, the material injection device comprises a material storage shell, one side of the inner wall of the material storage shell is provided with a material discharge nozzle, the inner wall of the material discharging nozzle is rotationally connected with a rotating water wheel, the part of the inner wall of the material storing shell, which is positioned at one side of the material discharging nozzle, is fixedly connected with an arc-shaped baffle plate matched with the rotating water wheel, one side of the inner wall of the material storage shell is fixedly connected with a filling pipeline, one end of the inner wall of the material storage shell is fixedly connected with an air bag, the air bag is communicated with the outside through an air outlet channel and is provided with a material injection device, a chemical reagent for wastewater treatment is filled in a material storage shell of the material injection device, when the wastewater water flow passes through the side surface of the material storage shell, the water flow drives the rotating water wheel to rotate, the chemical reagent in the material storage shell is taken out and put into the wastewater while the rotating water wheel rotates, the wastewater is conveniently subjected to chemical reaction treatment, a reaction tank is not required to be arranged, and the treatment with small occupied space is more convenient.

Preferably, one side and the deflector fixed connection of the bin outlet are kept away from to the storage shell, the bin outlet is provided with the multiunit and evenly distributed on the storage shell.

Preferably, the rotating water wheel comprises a rotating column, a push plate is fixedly connected to the side face of the rotating column, a water pushing groove is formed in the side face of the push plate, a discharge hole is formed in one side of the water pushing groove, the rotating water wheel is arranged, the water pushing groove is formed in the rotating water wheel, more reaction reagents can be conveniently taken out, and the reaction reagents taken out can be discharged through the discharge hole.

Preferably, the rough filtering device comprises a fixed seat, an annular slot is formed in the top of the fixed seat, a receiving groove is formed in one side of the inner wall of the annular slot, an air passage is formed in the bottom of the inner wall of the receiving groove, one end, far away from the receiving groove, of the air passage penetrates through the fixed seat and extends to the bottom of the fixed seat, a first piston is connected to the inner wall of one end, close to the receiving groove, of the air passage in a sliding manner, a second piston is connected to the inner wall of one end, far away from the first piston, of the air passage in a sliding manner, one end of the second piston extends to the outside of the fixed seat through the air passage and is in threaded connection with the inner wall of the air passage, a clamping seat is fixedly connected to one end, close to the receiving groove, of the clamping seat, a fixing column is fixedly connected to one side, far away from the first piston, of the inner wall of the annular slot is connected with a second filter screen cylinder in a sliding manner, the rough filtering device is arranged, large-diameter impurities in the wastewater can be removed out through the rough filtering device before fine filtering, avoid major diameter impurity to damage the inside filter screen of essence filter equipment, safe and reliable in utilization, and be provided with the fixing base, but the fixing base is detachable with filtering the spherical shell, conveniently clear up the second filter screen section of thick bamboo on fixing base and the fixing base, be provided with annular slot, the inside use of annular slot is inserted to the second filter screen section of thick bamboo, when the second filter screen section of thick bamboo takes place to damage, it can directly take off it to change, need not to change whole rough filter equipment, save the cost, be provided with the cassette, when the second filter screen section of thick bamboo inserts annular slot inside, fixed in the mesh that the fixed column on the accessible cassette inserted the inside second filter screen section of thick bamboo, can avoid the second filter screen section of thick bamboo to rotate, stability is better.

Preferably, the top of the fixing seat penetrates through the bottom of the filtering spherical shell and is in threaded connection with the filtering spherical shell, and the top of the second filtering net cylinder extends into the first filtering net cylinder and is in sliding connection with the inner wall of the first filtering net cylinder.

Preferably, the fixing column is provided with a plurality of groups and is uniformly distributed on the clamping seat, an annular air bag is sleeved on the fixing column, the annular air bag is arranged, the annular air bag can be used by the annular air bag, and filter screen cylinders with different mesh apertures are good in adaptability.

(III) advantageous effects

The invention provides an environment-friendly wastewater treatment device. The method has the following beneficial effects:

1) this environmental protection effluent treatment plant discharges waste water from the inlet pipe to the essence filter equipment inside, and the essence filter equipment rotates and drives waste water and rotate to discharge waste water from the essence filter equipment through centrifugal force to handle inside the ball, then discharge through the discharge gate, can realize continuous processing, and can accelerate waste water filtration through centrifugal force, the treatment effeciency is higher.

2) This environmental protection effluent treatment plant is provided with the essence and strains the device, and when waste water got into the essence and strains the device inside, get into respectively inside each space of being separated out by the division board, the waste water that gets into inside the partition space is close to annotating the material device orientation under the promotion of deflector, makes things convenient for waste water better and annotate the material device contact for annotate the material device and annotate the material more even.

(3) This environmental protection effluent treatment plant is provided with and annotates the material device, and the inside packing of storage shell of annotating the material device has the chemical reagent that waste water treatment used, and when waste water rivers passed through the storage shell side, rivers drove rotation water wheels and rotate, and the inside chemical reagent of storage shell is taken out and is dropped into to waste water when rotating water wheels pivoted, conveniently carries out chemical reaction to waste water and handles, need not to set up the reaction tank, and the less processing ratio of occupation space is more convenient.

(4) This environmental protection effluent treatment plant is provided with and rotates water wheels, rotates to be provided with on the water wheels and pushes away the basin, conveniently takes more reaction agent to the reaction agent accessible discharge opening discharge of taking over.

(5) This environmental protection effluent treatment plant is provided with rough filtering device, and accessible rough filtering device clears away out the major diameter impurity in the waste water earlier before centrifugal essence is strained, avoids major diameter impurity to damage the inside filter screen of essence filter equipment, uses safe and reliable.

(6) This environmental protection effluent treatment plant is provided with the fixing base, but the fixing base is detachable with filtering spherical shell, conveniently clears up the second filter screen section of thick bamboo on fixing base and the fixing base, is provided with annular slot, and the inside use of annular slot is inserted to the second filter screen section of thick bamboo, and when the second filter screen section of thick bamboo takes place to damage, directly take off it change can, need not to change whole colating device, save the cost.

(7) This environmental protection effluent treatment plant is provided with the cassette, and when the second filter screen section of thick bamboo inserted annular slot inside, the fixed column on the accessible cassette inserted and fixes in the inside mesh of second filter screen section of thick bamboo, can avoid the second filter screen section of thick bamboo to rotate, and stability is better.

(8) This environmental protection effluent treatment plant is provided with annular gasbag, and the filter screen section of thick bamboo of different mesh apertures is suitable for to accessible annular gasbag, and adaptability is better.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the fine filtering apparatus according to the present invention;

FIG. 4 is a schematic structural view of a material injection device according to the present invention;

FIG. 5 is a schematic view of a rotating water wheel according to the present invention;

FIG. 6 is a schematic view of the structure of a coarse filtration device according to the present invention;

fig. 7 is a schematic diagram of a structure of the card socket of the present invention.

In the figure: 1. the device comprises processing balls, 11, an upper hemispherical shell, 12, a lower hemispherical shell, 2, a feed inlet, 3, a communicating pipe, 4, a driving belt wheel, 5, a feed pipe, 6, a fine filter device, 61, a filter ball shell, 62, a first filter screen cylinder, 63, a partition plate, 64, a guide plate, 65, an arc-shaped spring sheet, 66, a containing chute, 67, an injection device, 671, a storage shell, 672, a discharge nozzle, 673, a rotating water wheel, 6731, a rotating column, 6732, a push plate, 6733, a water pushing tank, 6734, a discharge hole, 674, an arc-shaped baffle, 675, a filling pipeline, 676, an air bag, 7, a rough filter device, 71, a fixed seat, 72, an annular slot, 73, a containing tank, 74, an air passage, 75, a first piston, 76, a second piston, 77, a clamping seat, 78, a fixed seat, a 79, a second filter screen cylinder, 710, an adjusting air passage, 711, a plunger, 712, 8 and a discharge port.

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.

The first embodiment is as follows:

referring to fig. 1-2, the present invention provides a technical solution: the utility model provides an environmental protection effluent treatment plant, is including handling ball 1, its characterized in that: the top of a treatment ball 1 is provided with a feed inlet 2, the inner wall of the feed inlet 2 is connected with a communicating pipe 3 in a sliding way, the top of the communicating pipe 3 extends to the outside of the feed inlet 2 and is fixedly connected with a driving belt wheel 4, the top of the inner wall of the communicating pipe 3 is rotatably connected with a feed pipe 5 through a bearing, the bottom of the feed pipe 3 is penetrated and fixedly connected with a fine filtering device 6, the bottom of the fine filtering device 6 is penetrated and connected with a coarse filtering device 7 in a threaded way, the bottom of the treatment ball 1 is communicated with a discharge port 8, the treatment ball 1 comprises an upper hemispherical shell 11 and a lower hemispherical shell 12, the feed inlet 2 is arranged on the upper hemispherical shell 11, the discharge port 8 is arranged on the lower hemispherical shell 12, when in use, the driving belt wheel 4 is connected with an external driving device, the driving belt wheel 4 rotates to drive the communicating pipe 3, and discharge waste water from essence filter equipment 6 to processing ball 1 inside through centrifugal force, then discharge through discharge gate 8, can realize continuous processing to can accelerate waste water filtration through centrifugal force, the treatment effeciency is higher.

Example two:

referring to fig. 1-5, the present invention provides a technical solution based on the first embodiment: the fine filtering device 6 comprises a filtering spherical shell 61, a first filtering net barrel 62 penetrates through and is fixedly connected with the top of the filtering spherical shell 61, a partition plate 63 is fixedly connected with the outer side of the first filtering net barrel 62, one end of the side surface of the partition plate 63 is rotatably connected with a guide plate 64 through a rotating bolt, one end of the guide plate 64, which is far away from the rotating bolt, is rotatably connected with an arc-shaped spring sheet 65, one end of the arc-shaped spring sheet 65, which is far away from the guide plate 64, is rotatably connected with the side surface of the partition plate 63, a containing chute 66 is formed in the part, which is close to the guide plate 64, of the side surface of the partition plate 63, one side, which is far away from the guide plate 64, is fixedly connected with a material injection device 67, the material injection device 67 comprises a storage shell 671, one side of the inner wall of the storage shell 671 is provided with a discharging nozzle 672, the inner wall of the discharging nozzle 672 is rotatably connected with a rotating water wheel 673, and the part, which is positioned on one side of the inner wall of the storage shell 671, is fixedly connected with an arc-shaped baffle 674 matched with the rotating water wheel 673, material storage shell 671 inner wall one side fixedly connected with fills pipeline 675, and material storage shell 671 inner wall one end fixedly connected with gasbag 676, gasbag 676 is through going out the gas channel and outside intercommunication.

When waste water gets into essence filter equipment 6 inside, get into respectively inside by each space that division board 63 separated out, get into the inside waste water of partition space and be close to annotating material device 67 direction under deflector 64's promotion, make things convenient for waste water better with annotate material device 67 contact, it is more even to make notes material device 67 annotate the material, be provided with and annotate material device 67, the inside chemical reagent who has the waste water treatment usefulness of packing of storage shell 671 of annotating material device 67, when waste water rivers pass through storage shell 671 side, rivers drive rotation water wheel 673 and rotate, rotate water wheel 673 pivoted while with the inside chemical reagent of storage shell 671 and take out and drop into to waste water, conveniently carry out chemical reaction to waste water and handle, need not to set up the reaction tank, occupation space is less, it is more convenient to handle.

Example three:

referring to fig. 1-7, the present invention provides a technical solution based on the first embodiment and the second embodiment: the coarse filtering device 7 comprises a fixed seat 71, an annular slot 72 is arranged at the top of the fixed seat 71, a receiving groove 73 is arranged at one side of the inner wall of the annular slot 72, an air passage 74 is arranged at the bottom of the inner wall of the receiving groove 73, one end of the air passage 74 far away from the receiving groove 73 penetrates through the fixed seat 71 and extends to the bottom of the fixed seat 71, a first piston 75 is connected with the inner wall of one end of the air passage 74 close to the receiving groove 73 in a sliding manner, a second piston 76 is connected with the inner wall of one end of the air passage 74 far away from the first piston 75 in a sliding manner, one end of the second piston 76 extends to the outside of the fixed seat 71 through the air passage 74 and is in threaded connection with the inner wall of the air passage 74, a clamping seat 77 is fixedly connected with one end of the first piston 75, a fixing column 78 is fixedly connected with one side of the clamping seat 77 far away from the first piston 75, a second filter screen cylinder 79 is connected with the inner wall of the annular slot 72 in a sliding manner, the coarse filtering device 7 is arranged, large-diameter impurities in the waste water can be removed out through the coarse filtering device 7 before centrifugal fine filtering, avoid major diameter impurity to damage the inside filter screen of fine filtration device 6, safe and reliable is used, and be provided with fixing base 71, fixing base 71 and filtering spherical shell 61 are detachable, conveniently clear up the second filter screen section of thick bamboo 79 on fixing base 71 and the fixing base 71, be provided with annular slot 72, second filter screen section of thick bamboo 79 inserts the inside use of annular slot 72, when second filter screen section of thick bamboo 79 takes place to damage, directly take it off the change can, need not to change whole rough filter device 7, save cost, be provided with cassette 77, when second filter screen section of thick bamboo 79 inserts annular slot 72 inside, fixed column 78 on the accessible cassette 77 inserts in the inside mesh of second filter screen section of thick bamboo 79 and fixes, can avoid second filter screen section of thick bamboo 79 to rotate, stability is better.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are 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. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the 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 environmental protection effluent treatment plant, is including handling ball (1), its characterized in that: the top of the treatment ball (1) is provided with a feed inlet (2), the inner wall of the feed inlet (2) is connected with a communicating pipe (3) in a sliding manner, the top of the communicating pipe (3) extends to the outside of the feed inlet (2) and is fixedly connected with a driving belt wheel (4), the top of the inner wall of the communicating pipe (3) is rotatably connected with a feed pipe (5) through a bearing, the bottom of the feed pipe (3) is penetrated and fixedly connected with a fine filtration device (6), the bottom of the fine filtration device (6) is penetrated and connected with a coarse filtration device (7) in a threaded manner, and the bottom of the treatment ball (1) is communicated with a discharge outlet (8);

the processing ball (1) comprises an upper hemispherical shell (11) and a lower hemispherical shell (12), the feeding hole (2) is formed in the upper hemispherical shell (11), and the discharging hole (8) is formed in the lower hemispherical shell (12).

2. The environmental-friendly wastewater treatment device according to claim 1, wherein: the fine filtration device (6) is including filtering spherical shell (61), filter spherical shell (61) top and run through and the first filter screen section of thick bamboo (62) of fixedly connected with, first filter screen section of thick bamboo (62) outside fixedly connected with division board (63), division board (63) side one end is tied through rotating to rotate and is connected with deflector (64), the one end that rotates the bolt is kept away from in deflector (64) rotates and is connected with arc spring leaf (65), the one end that deflector (64) were kept away from in arc spring leaf (65) rotates with division board (63) side to be connected, division board (63) side is close to the part of deflector (64) and has been seted up and has been accomodate spout (66), one side fixedly connected with notes material device (67) that deflector (64) were kept away from in division board (63).

3. The environmental-friendly wastewater treatment device according to claim 2, wherein: the top of the filtering spherical shell (61) is communicated with the bottom of the communicating pipe (3), one end of the separating plate (63) far away from the first filtering screen cylinder (62) is fixedly connected with the inner wall of the filtering spherical shell (61), and the guide plate (64) and the material injection device (67) are provided with a plurality of groups.

4. The environmental-friendly wastewater treatment device according to claim 1, wherein: annotate material device (67) including storage shell (671), bin outlet (672) have been seted up to storage shell (671) inner wall one side, bin outlet (672) inner wall rotates and is connected with rotation water wheel (673), partial fixedly connected with that storage shell (671) inner wall is located bin outlet (672) one side and arc baffle (674) of rotation water wheel (673) looks adaptation, storage shell (671) inner wall one side fixedly connected with filling tube (675), storage shell (671) inner wall one end fixedly connected with gasbag (676), gasbag (676) are through gas outlet channel and outside intercommunication.

5. The environmental-friendly wastewater treatment device according to claim 4, wherein: one side that storing shell (671) kept away from blow-off nozzle (672) and deflector (64) fixed connection, blow-off nozzle (672) are provided with the multiunit and evenly distributed on storing shell (671).

6. The environmental-friendly wastewater treatment device according to claim 4, wherein: the rotating water wheel (673) comprises a rotating column (6731), a push plate (6732) is fixedly connected to the side surface of the rotating column (6731), a water pushing groove (6733) is formed in the side surface of the push plate (6732), and a discharge hole (6734) is formed in one side of the water pushing groove (6733).

7. The environmental-friendly wastewater treatment device according to claim 1, wherein: the coarse filtering device (7) comprises a fixed seat (71), an annular slot (72) is formed in the top of the fixed seat (71), an accommodating groove (73) is formed in one side of the inner wall of the annular slot (72), an air passage (74) is formed in the bottom of the inner wall of the accommodating groove (73), one end, far away from the accommodating groove (73), of the air passage (74) penetrates through the fixed seat (71) and extends to the bottom of the fixed seat (71), a first piston (75) is connected to the inner wall of one end, close to the accommodating groove (73), of the air passage (74) in a sliding mode, a second piston (76) is connected to the inner wall of one end, far away from the first piston (75), of the air passage (74), one end of the second piston (76) extends to the outside of the fixed seat (71) through the air passage (74) and is in threaded connection with the inner wall of the air passage (74), a clamping seat (77) is fixedly connected to one end, close to the accommodating groove (73), of the first piston (75), one side of the clamping seat (77) far away from the first piston (75) is fixedly connected with a fixing column (78), and the inner wall of the annular slot (72) is connected with a second filter screen cylinder (79) in a sliding mode.

8. The environmental-friendly wastewater treatment device according to claim 7, wherein: the top of the fixed seat (71) penetrates through the bottom of the filtering spherical shell (61) and is in threaded connection with the filtering spherical shell (61), and the top of the second filtering net cylinder (79) extends into the first filtering net cylinder (62) and is in sliding connection with the inner wall of the first filtering net cylinder.

9. The environmental-friendly wastewater treatment device according to claim 7, wherein: the fixing column (78) is provided with a plurality of groups and is uniformly distributed on the clamping seat (77), one side of the air passage (74) is communicated with an adjusting air passage (710), the top of the inner wall of the adjusting air passage (710) extends to the outside of the fixing seat (71) and is connected with a plunger (711) in a sliding mode, and the fixing column (78) is sleeved with an annular air bag (712).