CN210210261U

CN210210261U - Exhaust structure of telescopic dust-proof cover

Info

Publication number: CN210210261U
Application number: CN201920999349.9U
Authority: CN
Inventors: Liquan Zang; 臧丽泉; Jiasheng Liu; 刘家胜
Original assignee: China Metallurgical Construction Engineering Group Co Ltd
Current assignee: China Metallurgical Construction Engineering Group Co Ltd
Priority date: 2019-06-30
Filing date: 2019-06-30
Publication date: 2020-03-31
Anticipated expiration: 2029-06-30

Abstract

The utility model discloses a flexible dirt proof boot exhaust structure, including being separated by and with the exhaust ring cover and the flexible ring cover of central line setting, be provided with flexible bellows with the central line between exhaust ring cover and the flexible ring cover, flexible bellows's both ends difference fixed connection is in exhaust ring cover and flexible ring cover with rather than hole intercommunication, flexible ring cover bonds on the side of one side of back to the exhaust ring cover have with the rubber seal ring of flexible ring cover with central line setting, the exhaust ring is sheathe in and is worn to be equipped with an exhaust hole along its radial direction, the outside of exhaust ring cover and the position that corresponds the exhaust hole are provided with air cleaner, air cleaner's air inlet is connected with the intake pipe, air cleaner's one end threaded connection is just located the one end in the exhaust hole outside the exhaust ring cover to the intake pipe. The utility model discloses simple structure, convenient to use, at the in-process of concertina bellows compression, the air is discharged through the exhaust hole in it, purifies exhaust air simultaneously, has avoided the production of raise dust.

Description

Exhaust structure of telescopic dust-proof cover

Technical Field

The utility model relates to a dust keeper, concretely relates to flexible dirt proof boot exhaust structure.

Background

In various engineering constructions such as home decoration engineering and the like, a handheld impact drill is usually adopted to drill holes on buildings. However, a great amount of dust and particles are generated in the using process of the percussion drill, indoor air pollution is caused, the sight of drilling of an operator is influenced, and the health of the operator is damaged when the operator is in a dust environment for a long time.

In order to solve the technical problems, the inventor invents a dust-proof sleeve for percussion drill drilling, which comprises a fixed ring sleeve and a telescopic ring sleeve which are separated and arranged at the same central line, wherein the inner diameter of the fixed ring sleeve is consistent with that of the telescopic ring sleeve, a fastening rubber sleeve which is arranged at the same central line with the fixed ring sleeve is arranged in an inner hole of the fixed ring sleeve, the inner hole of the fastening rubber sleeve is a reducing hole, the aperture of the inner hole is gradually reduced from one end far away from the telescopic ring sleeve to one end of the telescopic ring sleeve along the central line direction of the fastening rubber sleeve, the fixed ring sleeve can be sleeved on a drill bit part of a percussion drill to be used through the fastening rubber sleeve for fixing, a plurality of guide slide bars are uniformly arranged between the fixed ring sleeve and the telescopic ring sleeve at intervals around the central line of the fixed ring sleeve, the axial line direction of the guide slide bars is parallel to the central line direction of the fixed ring sleeve, and the projections of the, two ends of a guide slide bar respectively penetrate through the fixed ring sleeve and the telescopic ring sleeve, the guide slide bar can respectively slide and fit with the fixed ring sleeve and the telescopic ring sleeve along the direction parallel to the central line of the fixed ring sleeve, two ends of the guide slide bar are respectively fixedly connected with a limiting head so as to be respectively abutted against the fixed ring sleeve and the telescopic ring sleeve to limit the guide slide bar, a telescopic corrugated pipe which is arranged with the same central line as the fixed ring sleeve is also arranged between the fixed ring sleeve and the telescopic ring sleeve, two ends of the telescopic corrugated pipe are respectively hermetically connected with the fixed ring sleeve and the telescopic ring sleeve so as to be communicated with inner holes of the fixed ring sleeve and the telescopic ring sleeve, a spring I is sleeved on a bar body on the guide slide bar and positioned between the fixed ring sleeve and the telescopic ring sleeve, two ends of the spring I are respectively abutted against the fixed ring sleeve and the telescopic ring sleeve so as to respectively provide spring force for the limiting heads to be abutted against the fixed ring, when the limiting head is respectively abutted against the fixed ring sleeve and the telescopic ring sleeve on one side where the limiting head is located, the telescopic corrugated pipe is in an extension state.

However, in the process of compression, the space of the telescopic corrugated pipe is reduced, the air in the telescopic corrugated pipe can be pressed out, and then the dust can be brought out together, and the dust can also be caused to affect the periphery.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a flexible dirt proof boot exhaust structure who has exhaust purification function, avoids producing the raise dust in the bellows compression process that stretches out and draws back.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a flexible dirt proof boot exhaust structure, including exhaust ring cover and the flexible ring cover that is separated by and set up with the central line, be provided with bellows with the central line between exhaust ring cover and the flexible ring cover, bellows's both ends are fixed connection respectively and are connected in exhaust ring cover and flexible ring cover in order to communicate with its hole, flexible ring cover bonds on the side of one side of back to exhaust ring cover and has the rubber seal ring with flexible ring cover with central line setting, exhaust ring sheathes in and wears to be equipped with an exhaust hole along its radial direction, the outside of exhaust ring cover and the position that corresponds the exhaust hole are provided with air cleaner, air cleaner's air inlet is connected with the intake pipe, air cleaner's one end threaded connection is just located the one end in the exhaust hole outside the exhaust.

The utility model discloses in, in order to avoid the dust to spill from the clearance between wall and the flexible ring cover, bond the rubber seal ring on the surface of flexible ring cover to improve the seal in the flexible bellows. And the air in the exhaust ring sleeve can be exhausted through the exhaust holes in the exhaust ring sleeve when the telescopic corrugated pipe is compressed, and an air filter is arranged to filter the air in order to avoid the influence of dust brought out from the air on the periphery.

As the optimization, the inboard of exhaust ring cover is provided with the blast pipe, and the blast pipe includes the edge the connecting pipe that exhaust ring cover radial direction extended setting, and the one end of connecting pipe is connected the exhaust hole just is located on the one end port of exhaust ring cover inboard, the other one end orientation of connecting pipe flexible ring cover place one side direction is extended and is formed the extension pipe, and one-way discharge valve is installed in order to avoid gas to pass through the extension pipe and keep away from the one end discharge of connecting pipe to the end of extension pipe.

When the top plate is drilled, dust falling from the drilled holes can be accumulated at the exhaust ring sleeve, so that the exhaust holes are easily blocked. The exhaust pipe is arranged to enable the exhaust port to be far away from the direction of the exhaust ring sleeve, so that the blockage of the exhaust hole due to sand accumulation can be avoided. In addition, when the telescopic corrugated pipe is opened, the expansion of the inner space of the telescopic corrugated pipe can generate certain negative pressure, the air can be sucked from the outside, if the air is sucked reversely through the exhaust holes, the air can be sprayed out from the pipe opening of the extension pipe, the extension pipe extends towards the direction of the telescopic ring sleeve, the sprayed air flow can easily act on the drilling position, the sand and dust at the drilling position can be blown away, and the blown sand and dust can be scattered around along with the fact that the telescopic ring sleeve leaves the wall surface. The one-way exhaust valve is arranged, so that air can be prevented from reversely entering the telescopic corrugated pipe from the exhaust hole to form impact airflow, and only the air enters from a gap between the telescopic ring sleeve and the wall surface, so that the generation of raised dust is reduced.

As optimization, one-way exhaust valve includes the inflator, the open end screw thread sealing connection of inflator has the end cover, the air inlet has been seted up at the bottom of the section of thick bamboo of inflator, the interior bottom surface fixedly connected with of inflator with the inner tube with the central line setting and with the inner tube of air inlet intercommunication, the one end sealing connection that the air inlet was kept away from to the inner tube has the end cover of holding, the end cover of holding is separated from the end cover and is set up at a distance from, set up a plurality of ventholes that communicate with the inner tube hole along its circumference direction even interval on the body of inner tube, just be located the position between end cover of holding and the end cover of holding in the inflator and be provided with the piston piece, the piston piece can be along inflator central line direction and inflator sliding fit, the air vent has been seted up at the center of piston piece, the projection of air vent along inflator central, two ends of the spring I are respectively abutted against the piston sheet and the sealing end cover so as to provide spring force for the piston sheet to be abutted against the air closing end cover, and the sealing end cover is provided with an air outlet and is connected with the extension pipe through the air outlet.

In the process of compression and exhaust of the telescopic corrugated pipe, air enters the inner pipe through the air inlet and then enters the air cylinder from the air outlet hole in the inner pipe, the piston sheet is abutted against the air closing end cover by the spring force, the air can push the piston sheet open from the air closing end cover along with the increase of the air pressure, and the air can enter the other end of the air cylinder through the air vent in the center of the piston sheet and finally is discharged through the air outlet.

Preferably, the air filter comprises a filter cartridge, a filter inlet having the same central line with the filter cartridge is arranged at the bottom of the filter cartridge, a filter cartridge is installed in the filter cartridge, an exhaust end cover for covering the opening of the filter cartridge is arranged at the opening end of the filter cartridge, a filter outlet is arranged on the exhaust end cover, an end cover fixing device for pressing and fixing the exhaust end cover at the opening of the filter cartridge is further arranged on the filter cartridge, the end cover fixing device comprises a plurality of rotating seats fixedly connected to the outer surface of the filter cartridge and close to the opening end of the filter cartridge, the plurality of rotating seats are uniformly arranged along the circumferential direction of the filter cartridge at intervals, a rotating shaft is arranged on the rotating seats, two ends of the rotating shaft are respectively rotatably connected with the rotating seats where the rotating seats are arranged, the axis of the rotating shaft is perpendicular to the central line of the filter cartridge, a sliding hole is arranged on the rotating shaft along the radial direction of the, the both ends of pull rod are fixedly connected with butt head and joint respectively and carry on spacingly in order to the pull rod, still the cover is equipped with the spring II that can provide the spring power for the joint butt in the axis of rotation on the pull rod and be located the pole body between butt head and the axis of rotation, exhaust end covers and corresponds the equal fixedly connected with cassette in position of every rotation seat respectively, set up the bayonet socket that can make the pull rod card go into on the cassette, when exhaust end cover lid closes on cartridge filter tube barrel mouth, the pull rod just is located the pole body between axis of rotation and the joint in order to go into to the bayonet socket in, and can compress tightly exhaust end cover in cartridge filter barrel mouth department with acting on the cassette through the joint.

A large amount of dust is generated in the drilling operation process, the filtering effect of the filtering filter element is easily reduced to be ineffective, and therefore the filtering filter element needs to be replaced frequently. For more convenient change it, set up the exhaust end cover to conveniently open and shut, when the exhaust end cover lid closes on cartridge filter nozzle, operate every pull rod on rotating the seat in proper order, outside pulling joint, and rotate, make the pull rod rotate and stretch out towards the cassette direction, finally block in the corresponding cassette, loosen the pull rod, the pull rod contracts under the effect of spring force, and then make the spacing butt of joint on the cassette, spring force makes the joint stimulate the cassette simultaneously, final exhaust end cover just can be under the effect of spring force, fix in cartridge filter nozzle.

As an optimization, a blocking piece is arranged in the filter cylinder, the plane of the blocking piece is perpendicular to the central line of the filter cylinder, the blocking piece can be in sliding fit with the filter cylinder along the direction of the central line of the filter cylinder, an inner opening which is arranged along the same central line as the filter inlet is formed in the blocking piece, one end of the air inlet pipe penetrates through the filter inlet and is connected to the blocking piece so as to be communicated with the inner opening, an installation sliding sleeve is further arranged in the filter cylinder and on one side, facing the opening of the filter cylinder, of the blocking piece, the diameter of an inner hole of the installation sliding sleeve is larger than that of the inner opening, the installation sliding sleeve can be in sliding fit with the filter cylinder along the direction of the central line of the filter cylinder, the filter core is embedded in the inner hole of the installation sliding sleeve, an annular sealing rubber gasket which is arranged along the same central line as the installation, when the exhaust end cover covers on the filter cylinder barrel opening, the push block can act on the installation sliding sleeve to enable the installation sliding sleeve to butt the blocking piece on the filter cylinder barrel bottom, and when the blocking piece pushes the installation sliding sleeve to move towards the direction of the filter cylinder barrel opening, one end, far away from the blocking piece, of the installation sliding sleeve extends out of the filter cylinder barrel opening.

In order to more conveniently take out the filter element from the filter cartridge, when the filter element is replaced, the air inlet pipe pushes the blocking piece, the blocking piece is abutted against the mounting sliding sleeve and pushes the mounting sliding sleeve, the far end of the mounting sliding sleeve can be pushed out of the cartridge opening of the filter cartridge, and an operator can conveniently take out the filter element. The filter cartridge who changes the new, in packing into the cartridge filter with the installation sliding sleeve, the exhaust end cover closes, and exhaust end cover closes the in-process at the lid, and ejector pad on it just can the butt on the installation sliding sleeve to corresponding promotion installation sliding sleeve, with the separation blade butt on the cartridge filter bobbin bottom, rubber seal pad can avoid just passing through the dust air of internal orifice from the gap leakage between separation blade and the cartridge filter, has also avoided the dust to pile up the card of separation blade simultaneously and has hindered.

As optimization, the push block is of an annular structure integrally and is fixedly connected to the exhaust end cover along one side of the central line direction, the outer diameter of the push block is smaller than the inner hole diameter of the filter cartridge, the inner diameter of the push block is larger than that of the mounting sliding sleeve, and the filtering row port is located on the inner side of the push block on the exhaust end cover. The push block acts on the mounting sliding sleeve more uniformly, so that the sealing effect of the sealing rubber pad is better.

As an optimization, the separation blade and towards one side fixedly connected with of filtration import with the plug bush that interior mouth with the central line set up, the external diameter of plug bush is less than the diameter of filtration import, the intake pipe insert in the plug bush and with plug bush threaded connection. The air inlet pipe is inserted into the plug bush and is in threaded connection with the plug bush. The installation of the air inlet pipe is convenient.

To sum up, the beneficial effects of the utility model reside in that: the utility model discloses simple structure, convenient to use, at the in-process of concertina bellows compression, the air is discharged through the exhaust hole in it, purifies exhaust air simultaneously, has avoided the production of raise dust.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a dust-proof sleeve for a percussion drill hole;

FIG. 2 is a cross-sectional view of a one-way vent valve in a dust boot of a percussion drill hole;

FIG. 3 is a cross-sectional view of an air filter in a dust boot of a percussion drill.

Detailed Description

The utility model is further described in detail by combining the attached drawings to the dustproof cover for percussion drill drilling which adopts the structure of the utility model.

As shown in fig. 1 to 3, the dust-proof cover for percussion drill drilling in this embodiment includes a fixed ring sleeve 1 and a telescopic ring sleeve 2 which are separated from each other and are disposed on the same central line, the inner diameter of the fixed ring sleeve 1 is identical to the inner diameter of the telescopic ring sleeve 2, a fastening rubber sleeve disposed on the same central line as the fixed ring sleeve is installed in an inner hole of the fixed ring sleeve 1, the inner hole of the fastening rubber sleeve is a variable diameter hole, the diameter of the inner hole is gradually reduced from one end away from the telescopic ring sleeve 2 toward one end of the telescopic ring sleeve 2 along the central line direction of the fastening rubber sleeve, the fixed ring sleeve 1 can be fixed by the drill bit of the percussion drill to be used through the fastening rubber sleeve, a plurality of guide slide bars 3 are uniformly spaced around the central line of the fixed ring sleeve 1 between the fixed ring sleeve 1 and the telescopic ring sleeve 2, the axial direction of the guide slide bars 3 is parallel to the central line direction of the fixed ring sleeve 1, and the projections of the guide slide bars 3 along the central line direction In the projection, two ends of a guide slide rod 3 respectively penetrate through a fixed ring sleeve 1 and a telescopic ring sleeve 2, the guide slide rod 3 can respectively slide-fit with the fixed ring sleeve 1 and the telescopic ring sleeve 2 along the direction parallel to the central line of the fixed ring sleeve 1, two ends of the guide slide rod 3 are respectively fixedly connected with a limiting head 4 to limit the guide slide rod 3 by respectively butting against the fixed ring sleeve 1 and the telescopic ring sleeve 2, a telescopic corrugated pipe 5 which is arranged with the fixed ring sleeve 1 and the telescopic ring sleeve 2 along the same central line is further arranged between the fixed ring sleeve 1 and the telescopic ring sleeve 2, two ends of the telescopic corrugated pipe 5 are respectively hermetically connected with the fixed ring sleeve 1 and the telescopic ring sleeve 2 to be communicated with inner holes of the fixed ring sleeve 1 and the telescopic ring sleeve 2, a spring I6 is sleeved on a rod body of the guide slide rod 3 and between the fixed ring sleeve 1 and the telescopic ring sleeve 2, two ends of the spring I6 respectively butt against the fixed ring sleeve 1 and the telescopic ring sleeve 2 to be respectively The ring sleeve 2 provides spring force, and when the limiting head 4 abuts against the fixed ring sleeve 1 and the telescopic ring sleeve 2 on one side of the limiting head, the telescopic corrugated pipe 5 is in an extension state.

In the specific embodiment, a rubber sealing ring arranged along the same central line as the telescopic ring sleeve 2 is bonded on the side surface of the telescopic ring sleeve 2, which is opposite to the fixed ring sleeve 1, the thickness of the rubber sealing ring along the direction of the central line of the rubber sealing ring is greater than that of the limiting head 4 on the side where the rubber sealing ring is located, and a containing hole for containing the limiting head 4 is concavely arranged on the side surface of one side of the rubber sealing ring, which faces the telescopic ring sleeve 2 and corresponds to the position of the limiting head 4 on the side where the rubber sealing ring is located;

fixed ring cover 1 orientation one side of flexible ring cover 2 still fixedly connected with rather than the exhaust ring cover 7 with the central line, the internal diameter of exhaust ring cover 7 with the internal diameter of fixed ring cover 1 is unanimous, telescopic bellows 5 just is located the one end sealing connection of fixed ring cover 1 is in order to communicate with the hole of exhaust ring cover 7 on exhaust ring cover 7, wears to be equipped with an exhaust hole along its radial direction on the exhaust ring cover 7, and the outside of exhaust ring cover 7 and the position that corresponds the exhaust hole are provided with air cleaner, and air cleaner's air inlet is connected with intake pipe 8, and air cleaner 7's one end threaded connection is just located the one end in the exhaust hole of exhaust ring cover 7 outside in intake pipe 8.

In this embodiment, the inboard of exhaust ring cover 7 is provided with blast pipe 9, and blast pipe 9 includes the edge the connecting pipe that exhaust ring cover 7 radial direction extended setting, and the one end of connecting pipe is connected the exhaust hole just is located on the one end port of exhaust ring cover 7 inboard, the other one end orientation of connecting pipe flexible ring cover 2 place one side direction is extended and is formed the extension pipe, and one-way discharge valve is installed in the end of extension pipe in order to avoid gaseous one end through the extension pipe and keep away from the connecting pipe to discharge.

In this embodiment, the one-way exhaust valve includes an air cylinder 10, a sealing end cap 11 is screwed and sealed to an opening end of the air cylinder 10, an air inlet is opened at a bottom of the air cylinder 10, an inner tube 12 which is concentric with the air cylinder 10 and communicated with the air inlet is fixedly connected to an inner bottom surface of the air cylinder 10, an end of the inner tube 12, which is far away from the air inlet, is hermetically connected to an air-closing end cap 13, the air-closing end cap 13 is spaced from the sealing end cap 11, a plurality of air outlets communicated with an inner hole of the inner tube 12 are evenly spaced along a circumferential direction of a tube body of the inner tube 12, a piston plate 14 is disposed in the air cylinder 10 and between the air-closing end cap 13 and the sealing end cap 11, the piston plate 14 can be in sliding fit with the air cylinder 10 along the central line direction of the air cylinder 10, an air vent is opened at a center of, a spring II 15 is arranged in the air cylinder 10 and between the piston sheet 14 and the sealing end cover 11, two ends of the spring II 15 are respectively abutted against the piston sheet 14 and the sealing end cover 11 so as to provide spring force for the abutment of the piston sheet 14 against the air closing end cover 13, and the sealing end cover 11 is provided with an air outlet and is connected with the extension pipe through the air outlet.

In the embodiment, the air filter includes a filter cartridge 16, a filter inlet having the same center line with the filter cartridge 16 is disposed at the bottom of the filter cartridge 16, a filter cartridge 17 is installed in the filter cartridge 16, an exhaust end cover 18 for covering the opening of the filter cartridge 16 is disposed at the opening end of the filter cartridge 16, a filter outlet is disposed on the exhaust end cover 18, an end cover fixing device for pressing and fixing the exhaust end cover 18 at the opening of the filter cartridge 16 is further disposed on the filter cartridge 16, the end cover fixing device includes a plurality of rotating seats 19 fixedly connected to the outer surface of the filter cartridge 16 and close to the opening end of the filter cartridge 16, the plurality of rotating seats 19 are uniformly spaced along the circumferential direction of the filter cartridge 16, a rotating shaft is disposed on the rotating seats 19, two ends of the rotating shaft are rotatably connected to the rotating seats 19, the axis of the rotating shaft is perpendicular to the center line of the filter cartridge 16, the slide hole is a through hole, a pull rod 21 which can be in sliding fit with the slide hole along the central line direction of the slide hole is arranged in the slide hole in a penetrating mode, two ends of the pull rod 21 are fixedly connected with an abutting head 22 and a clamping head 23 respectively to limit the pull rod 21, a spring III 24 which can provide spring force for the clamping head 23 to abut against the rotating shaft is further sleeved on the rod body which is arranged between the abutting head 22 and the rotating shaft on the pull rod 21, clamping seats 25 are fixedly connected on the exhaust end cover 18 and correspond to the positions of each rotating seat 19 respectively, bayonets which can enable the pull rod 21 to be clamped are formed in the clamping seats 25, when the exhaust end cover 18 covers the opening of the filter cartridge 16, the rod body which is arranged between the rotating shaft and the clamping head 22 can be clamped into the bayonets, and the exhaust end cover 18 can be tightly pressed on the opening of the filter cartridge 16 through.

In the present embodiment, a blocking plate 26 is disposed in the filter cartridge 16, a plane of the blocking plate 26 is perpendicular to a central line of the filter cartridge 16, the blocking plate 26 can be in sliding fit with the filter cartridge 16 along the direction of the central line of the filter cartridge 16, an inner opening disposed along the same central line as the filter inlet is formed in the blocking plate 26, one end of the air inlet pipe 8 penetrates through the filter inlet and is connected to the blocking plate 26 to communicate with the inner opening, an installation sliding sleeve 27 is further disposed in the filter cartridge 16 and located on one side of the blocking plate 26 facing the opening of the filter cartridge 16, the diameter of the inner hole of the installation sliding sleeve 27 is greater than that of the inner opening, the installation sliding sleeve 27 can be in sliding fit with the filter cartridge 16 along the direction of the central line of the filter cartridge 16, the filter cartridge 17 is embedded in the inner hole of the installation sliding sleeve 27, and an annular sealing rubber gasket disposed along the, the exhaust end cover 18 and the side of one side facing the inner hole of the filter cartridge 16 are fixedly connected with a push block 28, when the exhaust end cover 18 covers the opening of the filter cartridge 16, the push block 28 can act on the mounting sliding sleeve 27 to enable the mounting sliding sleeve 27 to abut against the blocking piece 26 on the bottom of the filter cartridge 16, and when the blocking piece 26 pushes the mounting sliding sleeve 27 to move towards the opening of the filter cartridge 16, one end of the mounting sliding sleeve 27, which is far away from the blocking piece 26, can extend out of the opening of the filter cartridge 16.

In this embodiment, the push block 28 is an annular structure and is fixedly connected to the exhaust end cover 18 along a side surface of a central line direction thereof, an outer diameter of the push block 28 is smaller than an inner hole diameter of the filter cartridge 16, an inner diameter of the push block 28 is larger than an inner diameter of the mounting sliding sleeve 27, and the filter row opening is located on the exhaust end cover 18 inside the push block 28.

In this embodiment, the blocking piece 26 is fixedly connected to one side of the filtering inlet, and is connected to the inserting sleeve 20, which is disposed on the same center line as the inner opening, the outer diameter of the inserting sleeve 20 is smaller than the diameter of the filtering inlet, and the air inlet pipe 8 is inserted into the inserting sleeve 20 and is in threaded connection with the inserting sleeve 20.

In the specific implementation process, a rubber sealing retaining ring which is arranged at the same center line as the vent hole and can act on the air-closing end cover is bonded on one side surface of the piston piece facing the air-closing end cover, so that the air tightness can be improved.

The venthole is the bar and follows inner tube length direction extends, and when the percussion drill was at some fast substrate of drilling rate, the concertina bellows compression rate was fast, and the bar venthole can increase the air output, made the better compression of concertina bellows.

The outer bottom surface of inflator just is located the position fixedly connected with of air inlet is used for right the air inlet carries out the filtration net that covers, can avoid some great dregs to enter into the inside jamming that causes the piston piece of inflator.

The filter mesh comprises a fixed outer ring which is arranged along the same central line as the air inlet, a mesh body which is positioned on the same plane with the fixed outer ring is arranged in the fixed outer ring, the mesh body is fixedly connected with the fixed outer ring, and the fixed outer ring is arranged at the bottom of the inflator through a fixing screw.

Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a flexible dirt proof boot exhaust structure, is including being separated by and the exhaust ring cover and the flexible ring cover that set up with the central line, is provided with bellows with the central line between exhaust ring cover and the flexible ring cover, and bellows's both ends difference fixed connection is in exhaust ring cover and flexible ring cover with rather than hole intercommunication, its characterized in that: the side surface of one side of the telescopic ring sleeve, which is back to the exhaust ring sleeve, is bonded with a rubber sealing ring which is arranged with the same central line as the telescopic ring sleeve, the exhaust ring sleeve is provided with an exhaust hole along the radial direction, the outer side of the exhaust ring sleeve is provided with an air filter corresponding to the exhaust hole, the air inlet of the air filter is connected with an air inlet pipe, and one end of the air inlet pipe, which is far away from the air filter, is in threaded connection with the exhaust hole and is positioned at one end of the outer.

2. The telescopic dust boot exhaust structure according to claim 1, characterized in that: the inboard of exhaust ring cover is provided with the blast pipe, and the blast pipe includes follows the connecting pipe that exhaust ring cover radial direction extended setting, the one end of connecting pipe is connected the exhaust hole just is located on the one end port of exhaust ring cover inboard, the other one end orientation of connecting pipe the one side direction of flexible ring cover place extends and forms the extension pipe, and one-way discharge valve is installed in order to avoid gaseous through the extension pipe and keep away from the one end discharge of connecting pipe to the end of extension pipe.

3. The telescopic dust boot exhaust structure according to claim 2, characterized in that: the one-way exhaust valve comprises an air cylinder, a sealing end cover is in threaded sealing connection with an opening end of the air cylinder, an air inlet is formed in the bottom of the air cylinder, an inner bottom surface of the air cylinder is fixedly connected with an inner tube which is arranged on the same central line of the air cylinder and communicated with the air inlet, one end, far away from the air inlet, of the inner tube is in sealing connection with an air-closing end cover, the air-closing end cover and the sealing end cover are arranged at intervals, a plurality of air outlet holes communicated with an inner hole of the inner tube are uniformly formed in the tube body of the inner tube along the circumferential direction at intervals, a piston sheet is arranged in the air cylinder and between the air-closing end cover and the sealing end cover, the piston sheet can be in sliding fit with the air cylinder along the central line direction of the air cylinder, an air vent is formed in the center of, two ends of the spring I are respectively abutted against the piston sheet and the sealing end cover so as to provide spring force for the piston sheet to be abutted against the air closing end cover, and the sealing end cover is provided with an air outlet and is connected with the extension pipe through the air outlet.

4. The telescopic dust boot exhaust structure according to claim 1, characterized in that: the air filter comprises a filter cartridge, a filter inlet which is concentric with the filter cartridge is arranged at the bottom of the filter cartridge, a filter cartridge is arranged in the filter cartridge, an exhaust end cover which is used for covering the opening of the filter cartridge is arranged at the opening end of the filter cartridge, a filter row opening is arranged on the exhaust end cover, an end cover fixing device which is used for tightly pressing and fixing the exhaust end cover at the opening of the filter cartridge is also arranged on the filter cartridge, the end cover fixing device comprises a plurality of rotating seats which are fixedly connected with the outer surface of the filter cartridge and close to the opening end of the filter cartridge, the rotating seats are uniformly arranged at intervals along the circumferential direction of the filter cartridge, a rotating shaft is arranged on each rotating seat, two ends of the rotating shaft are respectively rotatably connected with the rotating seat where the rotating shaft is arranged, the axis of the rotating shaft is vertical to the central line of the filter cartridge, a sliding hole is arranged on the rotating, the both ends of pull rod are fixedly connected with butt head and joint respectively and carry on spacingly in order to the pull rod, still the cover is equipped with the spring II that can provide the spring power for the joint butt in the axis of rotation on the pull rod and be located the pole body between butt head and the axis of rotation, exhaust end covers and corresponds the equal fixedly connected with cassette in position of every rotation seat respectively, set up the bayonet socket that can make the pull rod card go into on the cassette, when exhaust end cover lid closes on cartridge filter tube barrel mouth, the pull rod just is located the pole body between axis of rotation and the joint in order to go into to the bayonet socket in, and can compress tightly exhaust end cover in cartridge filter barrel mouth department with acting on the cassette through the joint.

5. The telescopic dust boot exhaust structure according to claim 4, characterized in that: the filter cartridge is internally provided with a baffle plate, the plane of the baffle plate is vertical to the central line of the filter cartridge, the baffle plate can be in sliding fit with the filter cartridge along the direction of the central line of the filter cartridge, the baffle plate is provided with an inner opening which is arranged along the same central line as the filter inlet, one end of the air inlet pipe penetrates through the filter inlet and is connected on the baffle plate so as to be communicated with the inner opening, an installation sliding sleeve is also arranged in the filter cartridge and positioned at one side of the baffle plate facing the opening of the filter cartridge, the diameter of an inner hole of the installation sliding sleeve is larger than that of the inner opening, the installation sliding sleeve can be in sliding fit with the filter cartridge along the direction of the central line of the filter cartridge, the filter cartridge is embedded in an inner hole of the installation sliding sleeve, an annular sealing rubber gasket which is arranged along the same central line as the installation sliding sleeve, when the exhaust end cover covers on the filter cylinder barrel opening, the push block can act on the installation sliding sleeve to enable the installation sliding sleeve to butt the blocking piece on the filter cylinder barrel bottom, and when the blocking piece pushes the installation sliding sleeve to move towards the direction of the filter cylinder barrel opening, one end, far away from the blocking piece, of the installation sliding sleeve extends out of the filter cylinder barrel opening.

6. The telescopic dust boot exhaust structure according to claim 5, characterized in that: the push block is integrally of an annular structure and is fixedly connected to the exhaust end cover along one side face of the center line direction, the outer diameter of the push block is smaller than the inner hole diameter of the filter cartridge, the inner diameter of the push block is larger than that of the mounting sliding sleeve, and the filtering row port is located on the inner side of the push block and is located on the exhaust end cover.

7. The telescopic dust boot exhaust structure according to claim 5, characterized in that: the separation blade just towards one side fixedly connected with of filtration import with the plug bush that the internal orifice is with the central line setting, the external diameter of plug bush is less than the diameter of filtration import, the intake pipe insert in the plug bush and with plug bush threaded connection.