CN117167582A - Underground air bag plugging device - Google Patents

Abstract

The invention discloses an underground air bag plugging device, which comprises a multi-chamber air bag and an air bag charging and discharging device; the multi-chamber air bag comprises two independent air bag cabins which are connected in sequence, and a transition chamber is arranged between the two independent air bag cabins; each independent air bag cabin comprises a cylinder body, a front plug and a rear plug, and the front plug and the rear plug are respectively connected with two ends of the cylinder body; the multi-chamber air bag further comprises a sealing connection disc and an air nozzle, wherein the sealing connection disc is detachably connected with the front plug, and the sealing connection disc is provided with a straight-through air nozzle; the straight-through air tap is connected with the air tap through a connecting pipe; the multi-chamber air bag is provided with folds, the air bag charging and discharging device charges and discharges the independent air bag chamber and the transition chamber independently according to the charging and discharging sequence, and the multi-chamber air bag deforms according to the set direction of the folds when the air bag is discharged. The underground air bag plugging device disclosed by the invention can solve the problem of air bag exhaust deformation.

Description

Underground air bag plugging device

Technical Field

The invention relates to the technical field of pipeline plugging, in particular to an underground air bag plugging device.

Background

At present, the operation of dredging, detection, repair, water closing test and the like of the drainage pipeline all need an air bag to block the pipeline opening. The plugging air bag is a hollow product processed by rubber or pvc sandwich mesh cloth material through a bonding process, and is plugged by filling compressed air and tensioning on the wall of a drainage pipeline, so that the plugging air bag is the most commonly used pipeline plugging tool. The common air bags are of a single cabin structure, a large amount of sediment, household garbage, construction garbage and other objects exist in the complex drainage pipeline environment, and the air bags are easily leaked or even burst due to external force factors such as materials and processing, so that the blocking failure is caused, and the safety of constructors and equipment is seriously influenced. The irregular shape and the size of the air bag after the air bag is exhausted are inconvenient for the frogman to carry, and the air bag is not suitable for carrying and constructing a robot.

The invention patent with the patent publication number of CN204611217U in the prior art relates to a sewer plugging air bag, which comprises an air bag and an end seat, wherein an air valve is arranged on the end seat and is used for inflating and deflating, the air valve is communicated with the air bag, a plurality of folding lines are arranged on the air bag and are in a zigzag shape, reinforcing plates are arranged on the inner wall of the air bag corresponding to the folding lines, and folds of the folding lines are reinforced, so that the air bag can be folded rapidly. The folding lines of the air bag in the prior art are folding along the length direction, so that the air bag is convenient to transport, store and arrange in order when being considered to be positioned on a well. It is not considered that when the balloon exhaust exits from the pipe downhole, the balloon exhaust deforms and randomly piles together to form bulges, which makes well exit difficult.

In the prior art, the invention patent with the patent publication number of CN106944776A relates to a plugging device for welding protective gas in a pipeline, which comprises a quick connector, a front air bag, an embedded hose, an air screen, a quick ball valve, a pressure reducing valve, a protective sleeve and a rear air bag. One end of the front air bag is provided with two groups of air nozzles, and the other end of the front air bag is provided with a group of air nozzles and an air screen. One end of the rear air bag is provided with a group of air nozzles, and the air nozzles on the rear air bag are connected with the other end of the front air bag through a rubber hose. The front air bag and the rear air bag are respectively arranged in the inner walls of the left side and the right side of the welded junction in the two groups of pipelines, and are connected through rubber hoses. The front air bag is internally provided with a built-in hose which is connected with a group of air inlet nozzles arranged at one end of the outer wall of the front air bag, and the built-in hose is connected with an air screen arranged at the other end of the front air bag. In the prior art, two air bags synchronously control charging and discharging, and a single air bag cannot be independently charged and discharged and sealed.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the problems that when the air bags are exhausted and removed from the underground, the air bags are exhausted and deformed and are stacked together irregularly to form bulges, the air bags are difficult to exit the well, and in the multi-cabin air bags, the single air bags cannot be inflated and discharged independently and are sealed are solved.

In order to solve the technical problems, the invention provides the following technical scheme:

an underground air bag plugging device comprises a multi-chamber air bag (3400) and an air bag charging and discharging device (500); the multi-chamber airbag (3400) comprises two independent airbag chambers (300) which are connected in sequence, and a transition chamber (400) is arranged between the two independent airbag chambers (300); wherein each independent airbag compartment (300) comprises a cylinder (310), a front plug (320) and a rear plug (330), and the front plug (320) and the rear plug (330) are respectively connected with two ends of the cylinder (310); the multi-chamber airbag (3400) further comprises a sealing connection disc (340) and an air nozzle (360), wherein the sealing connection disc (340) is detachably connected with the front plug (320), and the sealing connection disc (340) is provided with a straight-through air nozzle (350); the straight-through air tap (350) is connected with the air tap (360) through a connecting pipe (370);

the airbag charging and discharging device (500) comprises a charging and discharging device (510), a monitoring device (520) and a multi-core air pipe assembly (530), wherein the charging and discharging device (510) is connected with the straight-through air tap (350) through the multi-core air pipe assembly (530) or the monitoring device (520) is connected with the straight-through air tap (350) through the multi-core air pipe assembly (530) according to the working state of the multi-chamber airbag (3400);

The multi-chamber airbag (3400) is provided with folds, the airbag charging and discharging device (500) charges and discharges the independent airbag cabin (300) and the transition chamber (400) independently according to the charging and discharging sequence, and the multi-chamber airbag (3400) deforms according to the direction set by the folds when the airbag is discharged.

In one embodiment of the present invention, the number of air nozzles (360) is plural, and the air nozzles (360) are respectively fixed on the rear plugs (330) of the independent air bag chambers (300) directly connected with the air bag charging and discharging device (500), and also on the front plugs (320) of the independent air bag chambers (300) indirectly connected with the air bag charging and discharging device (500).

In one embodiment of the invention, an axial middle crease (311) and a radial crease (312) and an axial outer edge crease (313) are arranged on the multi-chamber air bag (3400); wherein the axial intermediate crease (311) is located between a central axis of the multi-chamber balloon (3400) and an outer edge of the multi-chamber balloon (3400); -said axial outer edge fold (313) is located at the outer edge of said multi-chamber balloon (3400); the radial folds (312) are located on the aft independent airbag compartment (300); the crease direction of the axial middle crease (311) and the axial outer crease (313) is folded toward the central axis direction of the multi-chamber airbag (3400).

In an embodiment of the present invention, a blocking radial crease (3230) is provided on each of the front block (320) and the rear block (330), the blocking radial crease (3230) is located at an intermediate position of the front block (320) and the rear block (330), and a length of the blocking radial crease (3230) is smaller than a diameter of the cylinder (310); the folding direction of the blocking radial crease (3230) is the inward concave direction of the front blocking (320) and the rear blocking (330) of each independent air bag cabin (300) to the cylinder body (310).

In one embodiment of the present invention, when the multi-chamber airbag (3400) is deflated, the airbag deforms in the direction set by the folds, and the airbag comprises: the independent airbag compartments (300) are deflated, the independent airbag compartments are folded towards the central axis direction of the multi-chamber airbag (3400) according to the axial middle folds (311), meanwhile, the front plugs (320) and the rear plugs (330) of each independent airbag compartment (300) are inwards concave towards the cylinder (310) according to the folding direction of the radial folds (3230) of the plugs, the connecting pipes (370) located in the transition chamber (400) are stretched, and the connecting pipes (370) located in the independent airbag compartments (300) directly connected with the airbag charging and discharging device (500) are contracted and deformed.

In one embodiment of the invention, the sequential inflation of the multi-chamber airbag (3400) is: the sequence in which the independent airbag chambers (300) and the transition chamber (400) are connected in sequence; the sequence of the multi-chamber airbag (3400) when being exhausted is as follows: the individual airbag compartments (300) are arranged first, followed by the transition chamber (400).

In one embodiment of the invention, the charging and discharging device (510) comprises an air source device (511), an air storage tank (512), an air pressure meter (513), a vacuum generator (514), a switch valve body (515) and a multi-pipeline air dividing device (516); the air storage tank (512) is respectively connected with the air source device (511) and the vacuum generator (514); the vacuum generator (514) is connected with an inlet of the multi-pipeline gas distribution device (516), a first thimble straight-through joint (5120) is arranged on an outlet of the multi-pipeline gas distribution device (516), and the multi-core gas pipe assembly (530) is connected with the first thimble straight-through joint (5120) in a pipe joint way; the barometer (513) is connected with the air storage tank (512), and the switch valve body (515) is connected with the vacuum generator (514).

In one embodiment of the invention, a multicore tracheal assembly (530) includes multicore unidirectional joint (531), multicore tracheal (532) and third multicore straight-through joint (533); the two ends of the multicore air pipe (532) are respectively connected with the multicore one-way joint (531) and the third multicore straight-through joint (533) in a pipe joint mode, the other end of the multicore one-way joint (531) is connected with the first thimble straight-through joint (5120) or is connected with the second thimble straight-through joint (5121) of the monitoring device (520) in a pipe joint mode, and the other end of the third multicore straight-through joint (533) is connected with the straight-through air nozzle (350) in a pipe joint mode.

In one embodiment of the present invention, when the multi-chamber airbag (3400) is required to be in a pipeline blocking state, the air source device (511) is turned on, the switch valve body (515) is turned off, the multi-pipeline air dividing device (516) is turned on, the air source device (511) inflates the multi-chamber airbag (3400) through the vacuum generator (514), the multi-pipeline air dividing device (516) and the multi-core air pipe assembly (530), and the multi-chamber airbag (3400) inflates to a set pressure to block a pipeline.

In one embodiment of the invention, when the multi-chamber airbag (3400) is required to be exhausted and taken out, the monitoring device (520) is removed, and the charging and discharging device (510) is reconnected; opening the switch valve body (515), opening the multi-pipeline gas distribution device (516), and taking the gas source device (511) out of the plugging pipeline by sucking gas from the multi-chamber gas bag (3400) through the vacuum generator (514) and discharging the gas from the vacuum generator (514) by the multi-pipeline gas distribution device (516), wherein the suction volume of the multi-chamber gas bag (3400) is reduced.

Compared with the prior art, the invention has the beneficial effects that:

1. the design of three cabins with unequal distances solves the problem of safety blocking, reduces the length of the air bag, and is convenient to carry in and out of a hoistway. And the three cabins are distributed in unequal intervals, the two large cabins at the two ends and the small cabin in the middle can meet the plugging capability requirement. When the air bag is not leaked, the three cabins are simultaneously tensioned on the inner wall of the drainage pipeline, so that the safety coefficient is increased. When a single cabin leaks or a foreign object punctures a certain partition in the middle to cause the leakage of the middle small cabin and the adjacent large cabin, the remaining large cabin is normally blocked. The middle small cabin is designed to be relatively three large cabins, so that the length of the air bag is shortened, and the safety blocking is not influenced when two adjacent cabins leak.

2. The deformation requirements to the two sides are cut off when the air bag is exhausted and sucked to be flat by properly lengthening the length of the cabin penetrating air pipe of the middle cabin.

3. In order to ensure that the rear folding part can not be propped against the pipe wall and can not be unfolded and straightened and the air pipe of the transition chamber can not be stretched to influence the inflation when the airbag is inflated in the folding state, the inflation sequence is the sequence of connecting the independent airbag cabin and the transition chamber in sequence. In order to ensure that the air bag can be flattened during the air exhaust and the air suction, the sequence during the air exhaust is as follows: the independent air bag cabins are firstly arranged in a row, and then the transition chamber is arranged in a row.

4. Prevent that the gasbag from breathing in, the gasbag from inhaling when flat middle partition irregular pile together and forming the swell, influence the gasbag folding, then axial middle crease, axial outer fringe crease and shutoff radial crease play the guide effect, shutoff radial crease warp according to crease settlement direction when breathing in and exhausting.

5. The straight-through air tap is used for being connected with the multi-core air pipe assembly rapidly, and is used for inflating and deflating the air bag, the inner connecting disc and the outer connecting disc clamp the air bag plugging layer to be buckled, and the matched circumferential concave-convex ring grooves are designed at the clamping matching surface, so that the air bag plugging layer is clamped and the sealing performance is enhanced.

6. The dredging device is used for chopping hard sludge precipitated at the bottom of the drainage pipeline, mixing the hard sludge with water, stirring the mixture into slurry, and pumping the slurry out of the plugging area. The solid small-particle garbage is filtered by the dredging device and is stirred with the silt to form slurry, the slurry is sucked away by a slurry pump and discharged, and the solid large-particle garbage is pushed out of the plugging area by the dredging device. The dredging device cleans the blocking area, the pipeline is blocked in the blocking area through the multi-chamber air bag, and the dredging device and the pipeline are integrated on the travelling device, so that the industrial efficiency is improved. The dredging device cleans building sharp objects or wall residues and the like in the blocking area, so that the multi-chamber air bag is prevented from being punctured, and the reliability of air bag blocking is further improved

7. The suction hopper is hinged with the lower part of the walking device, the upper part of the suction hopper is flexibly connected, and meanwhile, the suction port is connected with the inlet of the slurry pump through a hose, so that the suction hopper can swing upwards around the intersection point. The silt is cut and stirred on the sediment by the gravity pressure of the dredging device, so that the phenomenon that the rotation driving resistance is too large caused by the gravity pressure of the robot body on the spiral roller is avoided, the spiral roller is too high in hardness garbage, the back walking wheel support and the middle and front walking wheels of the dredging device and the walking device are suspended, and the walking driving force of the robot is greatly reduced.

8. The spiral blades are wound on the roller in a conical shape, and the spiral directions of the pair of spiral blades are opposite, so that the diameter of the middle position of the spiral roller is the largest in the longitudinal direction, and the position of the largest diameter of the spiral roller is opposite to the material sucking opening. In the rotating process of the spiral blades, hard sludge at the bottom of the drainage pipeline is cut up and stirred with water to form pasty slurry, the slurry is gathered at the middle position opposite to the material suction openings from the two sides by rotating the spiral blades in different spiral directions, and the pasty slurry is pumped and discharged by the slurry pump.

9. The difference between the height of the pair of helical blades and the upper radius formed by the circular arc side edge of the front baffle is larger than the difference between the height of the pair of helical blades and the lower radius formed by the circular arc side edge of the bottom plate. The suction hopper is arranged in an eccentric funnel shape, the spiral roller is different from the radius formed under the front baffle and the bottom plate, the upper part is large, the lower part is small, the feeding is loose, the discharging damping is adapted, the characteristics of large feeding space at the upper part and small discharging space at the lower part are realized, the ineffective dredging is reduced, and the dredging efficiency is improved. And the material sucking port is a front large and rear small shrinkage port to generate a certain guiding extrusion force for the sludge.

10. The pitch of each helical blade and the upper radius difference are set according to the solid particle passing capability of the slurry pump, and the upper radius difference is designed according to the solid particle passing capability smaller than the slurry pump, so that the larger solid particles are blocked. When larger solid particles are clamped between the spiral blade and the suction hopper, the solid particles are extruded by the reverse rotation of the spiral roller.

Drawings

FIG. 1 is a schematic view of a downhole balloon occlusion device according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion of a sealing adapter according to an embodiment of the present invention.

Fig. 3 and 4 are schematic diagrams of folds according to embodiments of the present invention.

Fig. 5 to 7 are schematic views showing folding of a multi-chamber airbag according to an embodiment of the present invention.

Fig. 8 and 9 are schematic diagrams showing the folded multi-chamber bladder after downhole venting in accordance with an embodiment of the present invention.

Fig. 10 to 13 are schematic views of an airbag charging and discharging device according to an embodiment of the invention.

FIGS. 14 to 16 are schematic views showing various working states of a multi-chamber airbag according to an embodiment of the present invention

FIG. 17 is a schematic diagram of embodiment 2 of the present invention.

Fig. 18 and 19 are schematic views of an airbag connecting device according to an embodiment of the present invention.

FIG. 20 is a schematic view of a dredging apparatus according to an embodiment of the invention.

Fig. 21 is a schematic view of a suction hopper according to an embodiment of the present invention.

Fig. 22 is a cross-sectional view of a drum in accordance with an embodiment of the present application.

FIG. 23 is a schematic view of a spiral roller and a pipe according to an embodiment of the present application.

Fig. 24 is a schematic view of a robotic dredging device according to an embodiment of the application.

Fig. 25 is a schematic view of robot obstacle clearing in an embodiment of the application.

Fig. 26 is a schematic view of a robot obstacle crossing according to an embodiment of the application.

Detailed Description

In order to facilitate the understanding of the technical scheme of the present application by those skilled in the art, the technical scheme of the present application will be further described with reference to the accompanying drawings.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1

Referring to fig. 1 to 14, the present application provides a downhole balloon plugging device, which comprises a multi-chamber balloon 3400 and a balloon inflation/deflation device 500. The multi-chamber airbag 3400 includes two independent airbag chambers 300 connected in sequence with a transition chamber 400 between the two independent airbag chambers 300. Wherein each independent airbag module 300 includes a cylinder 310, a front block 320 and a rear block 330, and the front block 320 and the rear block 330 are respectively connected to both ends of the cylinder 310. The multi-chamber airbag 3400 further comprises a sealing joint disc 340 and an air tap 360, wherein the sealing joint disc 340 is detachably connected with the front plug 320, and a through air tap 350 is arranged on the sealing joint disc 340, and the through air tap 350 is connected with the air tap 360 through a connecting pipe 370. The airbag inflation and deflation device 500 includes an inflation and deflation device 510, a monitoring device 520, and a multi-chamber air tube assembly 530, wherein the inflation and deflation device 510 is connected with the straight-through air tap 350 through the multi-chamber air tube assembly 530 or the monitoring device 520 is connected with the straight-through air tap 350 through the multi-chamber air tube assembly 530 according to the working state of the multi-chamber airbag 3400. The multi-chamber airbag 3400 is provided with folds, the airbag inflation/deflation device 500 independently inflates and deflates the independent airbag chamber 300 and the transition chamber 400 according to the inflation/deflation sequence, and the multi-chamber airbag 3400 deforms in the direction set by the folds when the airbag is deflated.

Referring to fig. 1 and 14, in one embodiment of the present invention, the number of air nozzles 360 is plural, and the air nozzles 360 are respectively fixed on the rear plug 330 of the independent air bag chamber 300 directly connected to the air bag charging and discharging device 500, and also on the front plug 320 of the independent air bag chamber 300 indirectly connected to the air bag charging and discharging device 500. The through air tap 350 is connected with the air tap 360 and the air charging and discharging device 500 respectively according to the number of the independent air bag cabins 300 and the transition chambers 400 through the through air tap 350, so as to charge and discharge the independent air bag cabins 300 and the transition chambers 400.

Referring to fig. 1 and 2, in an embodiment of the present invention, the requirement of the deformation of the inflatable bag and the change of the length of the air tube is met, and the connecting tube 370 is, for example, a spiral telescopic air tube. The independent air bag cabins 300 and the transition chambers 400 are distributed in three cabins which are not equidistant, the independent air bag cabins 300 at two ends are large cabins, and the transition chambers 400 are small cabins. The multi-chamber airbag 3400 solves the problem of safety blocking and reduces the length of the airbag through the design of non-equidistant three cabins, and is convenient to carry in and out of a hoistway, and in the embodiment, the length of the multi-chamber airbag 3400 is less than 2 meters. And guaranteed. The outer diameter of the cylinder 310 of the multi-chamber air bag 3400 is slightly larger than the inner diameter of the pipeline on the premise that no wrinkles appear on the pipe wall, so that the anti-explosion and anti-puncture capacity of the air bag is improved.

Referring to fig. 1 and 2, in an embodiment of the invention, the sealing disc 340 includes an inner disc 341 and an outer disc 342, the inner disc 341 and the outer disc 342 are detachably connected, and the plug 320 is clamped and fastened, the clamping and fastening surfaces of the inner disc 341 and the outer disc 342 are provided with identical circumferential concave-convex ring grooves 3412, and the through air nozzle 350 is fixedly connected with the inner disc 341.

Referring to fig. 1 to 4, in an embodiment of the present invention, an axial middle fold 311 and a radial fold 312 and an axial outer edge fold 313 are provided on a multi-chamber airbag 3400. Wherein the axial middle fold 311 is located between the central axis of the multi-chamber balloon 3400 and the outer edge of the multi-chamber balloon 3400. The axial outer edge fold 313 is located at the outer edge of the multi-chamber balloon 3400. Radial folds 312 are located on the aft independent airbag compartment 300, i.e., on the independent airbag compartment 300 indirectly connected to the airbag cushion 500. The fold directions of the axial middle fold 311 and the axial outer edge fold 313 are folded toward the central axis of the multi-chamber airbag 3400.

Referring to fig. 1 to 4, in an embodiment of the present invention, a seal radial crease 3230 is provided on each of the front seal 320 and the rear seal 330, the seal radial crease 3230 is located at an intermediate position of the front seal 320 and the rear seal 330, and a length of the seal radial crease 3230 is smaller than a diameter of the cylinder 310. The folding direction of the blocking radial crease 3230 is the direction in which the front blocking 320 and the rear blocking 330 of each individual airbag module 300 are recessed inward of the barrel 310.

Referring to fig. 1 to 7, in an embodiment of the present invention, before the robot goes down the well, the multi-chamber airbag 3400 is folded, firstly the multi-chamber airbag 3400 is tiled, then the two sides of the multi-chamber airbag 3400 are folded in half according to the axial middle folds 311, then the multi-chamber airbag 3400 is folded in half according to the radial folds 312, and is bound by the plastic wrapping tape 302. The bundled multi-chamber airbag 3400 is fixed on the walking device 100 through the hanging ring 301, and the multi-chamber airbag 3400 is pulled into and out of the manhole through the front hanging belt 303 on the multi-chamber airbag 3400 and fixed at the wellhead to prevent the multi-chamber airbag 3400 from being washed away by water. When the multi-chamber airbag 3400 is separated from the running gear 100, the airbag inflation and release device 500 inflates the multi-chamber airbag 3400, and in order to ensure that the rear folded part does not abut against the pipe wall and cannot be unfolded and straightened and the air pipe of the transition chamber 400 cannot be unfolded to influence the inflation when the airbag is inflated in the folded state, the inflation sequence is the sequence in which the independent airbag cabin 300 and the transition chamber 400 are connected in sequence. The multi-chamber air bag 3400 is inflated through the air bag inflation and deflation device 500, and the plastic winding adhesive tape 302 is broken through to be bound and tensioned on the pipe wall so as to complete the sealing.

Referring to fig. 1 to 9, in an embodiment of the present invention, when the multi-chamber airbag 3400 needs to be deflated, in order to ensure that the airbag can be flattened during the deflation and the deflation, the sequence of the inflation is as follows: the individual airbag compartments 300 are first arranged, followed by the transition chamber 400.

Referring to fig. 1 to 9, in an embodiment of the present invention, when the air bag is inflated and the air bag is deflated, the middle partition is prevented from irregularly piling up to form a bulge, so as to affect the folding of the air bag, and the axial middle crease 311, the axial outer crease 313 and the blocking radial crease 3230 play a guiding role, and the blocking radial crease 3230 deforms according to the crease setting direction when the air bag is inflated and deflated. Wherein, the crease can be realized by plastic permanent deformation generated by cold pressing or high-temperature pressurization by external force.

When the multi-chamber airbag 3400 is deflated, the deformation is performed in the direction set by the folds, and the method includes: the individual airbag compartments 300 are deflated, folded in the direction of the central axis of the multi-compartment airbag 3400 according to the axial middle fold 311, and simultaneously the front and rear stoppers 320 and 330 of each individual airbag compartment 300 are inwardly recessed toward the cylinder body 310 according to the folding direction of the stopper radial fold 3230, and the connection tube 370 located in the transition compartment 400 is stretched, and the connection tube 370 located in the individual airbag compartment 300 directly connected to the airbag deployment device 500 is contracted and deformed.

Referring to fig. 1 and 10 to 16, in an embodiment of the present invention, an airbag charging and discharging device 500 is located on a well, and includes a charging and discharging device 510, a monitoring device 520 and a multi-chamber air tube assembly 530, wherein the charging and discharging device 510 is connected with the multi-chamber air tube 3400 through the multi-chamber air tube assembly 530 or the monitoring device 520 is connected with the multi-chamber air tube 3400 through the multi-chamber air tube assembly 530 according to the working state of the multi-chamber air tube 3400.

Referring to fig. 1, 10 to 16, in an embodiment of the present invention, a charging/discharging device 510 includes a gas source device 511, a gas storage tank 512, a barometer 513, a vacuum generator 514, a switch valve body 515, and a multi-channel gas dividing device 516. The air storage tank 512 is connected with the air source device 511 and the vacuum generator 514 respectively, the multi-pipeline air dividing device 516 is connected with the inlet of the vacuum generator 514, and the multi-core air pipe assembly 530 is connected with the outlet of the multi-pipeline air dividing device 516 in a pipe joint way. The air pressure gauge 513 is connected to the air tank 512, the air source device 511 compresses air (positive pressure), the air tank 512 stores the compressed air, and the air pressure gauge 513 is used for displaying the pressure of the compressed air in real time. The switching valve body 515 is connected to the vacuum generator 514, and the vacuum generator 514 generates vacuum suction force (negative pressure) when high-pressure air circulates, and the switching valve body 515 is used to open or close an exhaust port of the vacuum generator 514. The multi-line gas distribution device 516 is used to open or close the gas path with the multi-chamber airbag 3400. Wherein, a first thimble through joint 5120 is arranged on the outlet of the multi-pipeline gas distribution device 516, the multi-pipeline gas distribution device 516 is a combined two-position two-way electromagnetic valve or a multi-pipeline gas distribution row, and the multi-pipeline gas distribution row is straight-through and is divided into multiple paths. Specifically, the multi-line gas distribution apparatus 516 has several lines depending on the number of independent airbag chambers 300 and transition chambers 400. The air source device 511 is, for example, an air compressor.

Referring to fig. 1, 10-16, in an embodiment of the present invention, the monitoring device 520 includes a pressure display component 521, a pressure measuring component 522, a siren 523, a warning light 524, and a second thimble through connector 5121. Both the siren 523 and the warning lamp 524 are connected to the pressure display assembly 521, and the pressure measurement assembly 522 is connected to the pressure display assembly 521 and the second thimble straight-through connector 5121, respectively. The pressure display assembly 521 monitors the pressure maintaining condition of the multi-chamber airbag 3400 through the connection of the second thimble through joint 5121 and the multi-chamber air pipe assembly 530, wherein each chamber is tested by the corresponding pressure measuring assembly 522, the pressure value of each chamber is displayed on the pressure display assembly 521, and when the pressure is lower than a set safety value, the siren 523 and the warning lamp 524 act simultaneously to give out an audible and visual alarm. Specifically, pressure sensing assembly 522 is a pressure sensor.

Referring to fig. 1, 10-16, in one embodiment of the present invention, a multicore air pipe assembly 530 includes multicore unidirectional connector 531, multicore air pipe 532, and third multicore straight-through connector 533. The two ends of the multicore air pipe 532 are respectively connected with the multicore one-way joint 531 and the third multicore straight-through joint 533 in a pipe way, the other end of the multicore one-way joint 531 is connected with the first thimble straight-through joint 5120 or the second thimble straight-through joint 5121 in a pipe way, and the other end of the third multicore straight-through joint 533 is connected with the straight-through air nozzle 350 in a pipe way. The multicore one-way joint 531 is the check valve subassembly, is in the confined state when not connecting other parts.

Referring to fig. 1 and 10 to 16, in an embodiment of the present invention, when the multi-chamber airbag 3400 is required to be in a pipe blocking state, the robot enters the drain pipe, and the multi-chamber airbag 3400 is separated from the traveling apparatus 100. Simultaneously, the air source device 511 is opened, the switch valve body 515 is closed, the multi-pipeline air dividing device 516 is opened, the air source device 511 inflates the multi-chamber air bag 3400 through the vacuum generator 514, the multi-pipeline air dividing device 516 and the multi-pipeline air pipe assembly 530, and the multi-chamber air bag 3400 inflates to set pressure to seal a pipeline.

Referring to fig. 1, 10 to 16, in an embodiment of the present invention, when the multi-chamber airbag 3400 is in a pressure maintaining and plugging state, after the multi-chamber airbag 3400 is inflated to a plugging state, the quick plug connector between the charging and discharging device 510 and the multi-core tracheal assembly 530 is disconnected, and the charging and discharging device 510 is removed, and the multi-chamber airbag 3400 is in a pressure maintaining and plugging state. The monitoring device 520 is connected with the multi-core air pipe assembly 530, so that the air pressure of each cabin is independently displayed, and the pressure is lower than a set safety value and the sound and light alarm is carried out. The charging and discharging device 510 can be connected with a mobile terminal through wireless communication, and remote monitoring is realized through the mobile terminal.

Referring to fig. 1, 10-16, in one embodiment of the present invention, when the multi-chamber airbag 3400 is required to be exhausted and removed, the monitoring device 520 is removed and the charging and discharging device 510 is reconnected. When the switch valve body 515 is opened, the multi-pipeline gas distribution device 516 is opened, the gas source device 511 sucks gas from the multi-chamber gas bag 3400 through the vacuum generator 514 and the multi-pipeline gas distribution device 516 and discharges the gas from the vacuum generator 514, the gas suction volume of the multi-chamber gas bag 3400 is reduced, and the gas is taken out from the plugging pipeline.

Example 2

In the complex drainage pipeline environment, a large amount of sediment, household garbage, construction garbage and other objects exist, and the factors of materials, processing and external force are extremely easy to cause leakage and even burst of the air bag to cause blocking failure. Although the multi-chambered airbag structure can improve the reliability of multi-airbag blocking. However, if the pipeline dredging is performed before the air bag plugging, building sharp objects, wall building residues and the like are removed, and the air bag plugging is performed after dredging, the reliability of the air bag plugging is further improved. In the prior art, pipeline dredging and air bag plugging are respectively two independent devices, when the dredging device is operated, after the dredging operation is finished, the dredging device needs to be withdrawn from the pit, and then the air bag plugging is put into the pit, so that the air bag plugging is carried out, and the working efficiency is low.

Referring to fig. 17, in this embodiment, in combination with embodiment 1, there is provided a plugging robot including a running gear 100 and a dredging device 200 located at the front end of the running gear 100, and a multi-chamber air bag 3400 located at the back of the running gear 100. The running gear 100 carries the dredging device 200 and the multi-chamber air bag 3400 to enter the drain pipe, the dredging device 200 cleans a plugging area in the drain pipe, after cleaning is completed, the multi-chamber air bag 3400 is separated from the running gear 100, the running gear 100 carries the dredging device 200 to exit the drain pipe, and meanwhile the multi-chamber air bag 3400 is inflated, so that the multi-chamber air bag 3400 is tightly inflated in the wall of the drain pipe to plug the pipeline.

Referring to fig. 17 to 19, in an embodiment of the present invention, a walking device 100 includes a walking body 110 and an airbag connection device 120 located on the walking body 110. The bottom of the walking trunk 110 is provided with an accommodating space 111, and a slurry pump 240 of the dredging device 200 is positioned in the accommodating space 111 and fixedly connected with the walking trunk 110. The afterbody of walking truck 110 sets up rings 111 in the back, and both sides are provided with magnetic force rings 112, when the robot is about to go into the well, is fixed in on rings 111 in the back and magnetic force rings 112 through the lifting rope, and when the robot was placed in the inspection shaft bottom through gallows and lifting rope, magnetic force rings 112 loses the electricity, breaks away from with walking truck 110, and the robot gets into in the drain pipe, starts desilting device 200, clears up out the shutoff region.

Referring to fig. 17 to 19, in an embodiment of the present invention, the airbag connecting device 120 includes a connecting housing 121, recesses 122 are provided at both sides of a middle portion of the connecting housing 121, such that a protrusion 123 is formed between the two recesses 122, and a front housing 124 and a rear housing 125 connected to the protrusion 123. And the front housing 124 is provided with a sewage inlet 1241, the rear housing 125 is provided with a sewage outlet 1251, the sewage inlet 1241 is communicated with the inside of the convex part 123 and the sewage outlet 1251 to form a sewage channel, the sludge outlet 241 of the sludge pump 240 is connected with the sewage pipe 242, and the sewage pipe 242 penetrates through the sludge channel to discharge sludge out of the water drain pipe. The sewage outlet 1251 is located on the rear housing 125 and is connected with the sludge outlet 241 in a pipe way, and when the sludge pump 240 works, a larger reaction force is generated in the process of discharging sludge, and the reaction force is converted into a driving force for the robot forwards, so that the power of a driving motor of the robot is reduced.

Referring to fig. 17 to 19, in an embodiment of the present invention, the air bag connection device 120 further includes a plurality of pin removal assemblies 126 and roller assemblies 127, and a plurality of recesses 122 in which the pin removal assemblies 126 and roller assemblies 127 are located. A plurality of pin stripper assemblies 126 are provided with telescoping rods 1261 on opposite ends of the front and rear housings 124, 125. When the running gear 100 carries the multi-chamber air bag 3400, the hanging ring 301 on the multi-chamber air bag 3400 is sleeved on the telescopic rod 1261, so that the multi-chamber air bag 3400 and the running gear 100 are integrated when the running gear goes into the well. The roller assembly 127 is positioned between the pin removal assembly 126 and the boss 123, and when the multi-chamber air bag 3400 is disengaged from the running gear 100, the roller assembly 127 is in rolling friction with the multi-chamber air bag 3400.

Referring to fig. 17-19, in one embodiment of the present invention, telescoping rod 1261 is opened and multi-chamber air bag 3400 is decoupled from running gear 100. Under the working conditions of high water level, full water or larger pipeline diameter, the multi-chamber air bag 3400 is separated from the running gear 100 to float upwards, at the moment, the separating power of the roller assembly 127 is an unpowered roller, and the roller assembly can freely rotate, so that the sliding friction of the multi-chamber air bag 3400, which is not completely separated from the running gear 100, is changed into rolling friction, and the running gear 100 is prevented from dragging the multi-chamber air bag 3400 out. The running gear 100 is withdrawn from the lower portion of the multi-chamber airbag 3400 to the manhole and lifted to the entrance by the hoist rope. The multi-chamber air bag 3400 inflates and expands the air bag through the air bag inflation and release device 500, breaks the constraint of the plastic adhesive tape and tightens on the pipe wall, and completes the blocking. In the case of a low water level or small pipe diameter, the disengagement power of the roller assembly 127 is a powered roller. When the running gear 100 releases the multi-chamber air bag 3400 to be withdrawn through the pin removing assembly 126, the roller assembly 127 reversely rotates, namely, rotates in the direction opposite to the withdrawal direction of the running gear 100, and generates forward moving force for poking the multi-chamber air bag 3400, so that the multi-chamber air bag 3400 is prevented from being separated from the running gear 100 thoroughly and not being withdrawn. The multi-chamber airbag 3400 and the traveling apparatus 100 are separated by the rotational conveyance of the roller assembly 127, and the traveling apparatus 100 is withdrawn to the manhole. The multi-chamber air bag 3400 inflates and expands the air bag through the air bag inflation and release device 500, and breaks through the constraint and the tension of the plastic adhesive tape to complete the sealing on the pipe wall.

Referring to fig. 17 to 19, in an embodiment of the present invention, the running gear 100 is capable of steering, advancing and retracting downhole. At both ends of the front case 124 and the rear case 125, a body illumination lamp 1245 and a downhole camera 1246 are provided; and a pair of body lights 1245 are provided on both sides of each of the downhole cameras 1246. A pair of body lights 1245 are offset illuminated at 45 to prevent light from being reflected in the same direction to affect the down-hole camera 1246. The downhole camera 1246 is a wide angle camera for taking pictures of conditions in the pipeline. Radar (not shown) and power signal connector 113 are also provided on the traveling trunk 110, and the dredging device 200, the radar, the pin removal assembly 126, the roller assembly 127, the body illumination lamp 1245, the downhole camera 1246 and the driving device on the traveling device 100 are connected with the controller on the well through the power signal connector 113.

Referring to fig. 18 to 23, in an embodiment of the present invention, a dredging device 200 includes a suction hopper 210 and a spiral roller 220. The suction hopper 210 is flexibly connected with the connecting shell 121, hinged with the walking trunk 110, and the spiral roller 220 is eccentrically assembled with the suction hopper 210.

Referring to fig. 18 to 23, in an embodiment of the present invention, the suction hopper 210 includes a top plate 211, a bottom plate 212, side plates 213, front and rear baffles 214 and 215, and a supporting wheel 216. Both ends of the pair of side plates 213 are connected to the top plate 211 and the bottom plate 212, respectively, and the front baffle 214 is connected to the top plate 211 and the pair of side plates 213, and is on the same side as the spiral drum 220. One end of each of the plurality of rear baffles 215 is connected to the top plate 211, the bottom plate 212 and the side plates 213, and the other end is folded toward the traveling device 100 to form a suction port 230, and the suction port 230 is connected to the slurry pump 240. The pair of support wheels 216 are connected to the pair of side plates 213, respectively, and support the suction hopper 210 so as to move in the pipe along with the running gear 100. Wherein, a hopper connector 2111 is provided on the top plate 211, and is flexibly connected with the connection housing 121 through the hopper connector 2111. The side plate 213 is provided with a lug 2131, and is connected with the walking body 110 through a dredging connecting plate 260, in particular, the dredging connecting plate 260 is detachably connected with the walking body 110 and is hinged with the lug 2131. The support wheel 216 positions the dredging device 200 and the bottom of the pipeline relative to each other, preventing the spiral blade 222 from rubbing against the bottom of the pipeline.

Referring to fig. 18 to 23, in an embodiment of the invention, an angle a between a connecting edge of the side plate 213 and the top plate 211 and a connecting edge of the side plate 213 and the front baffle 214 is an obtuse angle, so that the front baffle 214 has a certain gradient, the bottom plate 212 is vertically connected to the side plate 213, the suction hopper 210 is arranged in an "eccentric funnel" shape, and the sides of the front baffle 214 and the bottom plate 212 near the spiral roller 220 are all arranged in an arc shape.

Referring to fig. 18 to 23, in an embodiment of the present invention, the spiral roller 220 is detachably connected to the suction hopper 210 through a roller mounting plate 250. A plurality of groups of adjustment holes 251 are provided on the drum mounting plate 250 to adjust the gap between the spiral drum 220 and the pipe wall. The spiral roller 220 includes a roller 221 and a pair of spiral blades 222 wound and fixed on the roller 221, wherein the pair of spiral blades 222 are wound on the roller 221 in a conical shape, and the spiral directions of the pair of spiral blades 222 are opposite, so that the diameter of the spiral roller 220 in the longitudinal direction is the largest, and the position of the largest diameter of the spiral roller 220 is opposite to the material suction opening 230. The spiral blade 222 rotates to cut up the hard sludge at the bottom of the drain pipe 600, and the hard sludge is stirred with water to form pasty slurry, and the slurry is collected by the middle position opposite to the two side suction openings 230 through the rotation of the spiral blade 222 in different spiral directions, and is sucked and discharged by the slurry pump 240, as shown in fig. 24.

Referring to fig. 18 to 23, in an embodiment of the present invention, a drum motor 2211 and a conductive slip ring 2212 are disposed in a drum 221, and two sides of the drum 221 are sealed by a rotary oil seal and an O-ring of an end cover, so that the structure is compact and the sealing is reliable. The power cable 2213 is connected with the conductive slip ring 2212 to transmit signals and power to the drum motor 2211, and the drum motor 2211 rotates to drive the spiral drum 220 to rotate.

Referring to fig. 18 to 23, in an embodiment of the present invention, the maximum radius of the spiral roller 220 is smaller than the radius of the drain pipe, and the supporting wheel 216 supports the dredging device 200, so that a certain gap B is kept between the spiral roller 220 and the wall of the drain pipe, and the spiral roller 220 is prevented from rotating to scratch the wall of the pipe. The upper radius difference R between the height of the pair of helical blades 222 and the circular arc side of the front baffle 214 is greater than the lower radius difference (not shown) between the height of the pair of helical blades 222 and the circular arc side of the bottom plate 212. The suction hopper 210 is arranged in an eccentric funnel shape, the spiral roller 220 is different from the radius formed under the front baffle 214 and the bottom plate 212, the upper part is large, the lower part is small, the adaptation feeding is loose, the discharging damping is realized, the characteristics of large upper feeding space and small lower discharging space are realized, the ineffective dredging is reduced, and the dredging efficiency is improved. And the material sucking port 230 is a front large and rear small shrinkage port to generate a certain guiding extrusion force for the sludge.

Referring to fig. 18-23, in one embodiment of the present invention, the pitch D and the upper radius difference R of each helical blade 222 are set according to the solid particulate matter throughput of the mud pump 240. The upper radius difference R is designed to be smaller than the solids throughput capacity of the mud pump 240 to act as a barrier to larger solids. When larger solid particles are caught between the screw blade 223 and the suction hopper 210, the extrusion is reversely rotated by the screw drum 220.

Referring to fig. 18 to 26, in an embodiment of the present invention, when the rotation direction of the spiral roller 220 is opposite to the rotation direction of the travelling wheel 130 of the travelling device 100, the larger solid particles can be lifted and tumbled upwards during the dredging process, as shown in fig. 25. In order to prevent the solid garbage from rotating and climbing over, the obstacle can only be overcome. The spiral roller 220 and the travelling wheel 130 are rotated in the same direction, and no dredging action exists at this time, as shown in 26. In this embodiment, the maximum solid particulate matter throughput of the mud pump 240 is 20mm, and the pitch D and the upper radius difference R of the helical blades 222 is less than 20mm. Not only ensures that the mud and the solid particles smaller than 20mm can be sucked away and removed by the mud pump 240, but also can push away the larger solid particles while blocking the forward movement.

Referring to fig. 1 to 26, in an embodiment of the present invention, when the multi-chamber airbag 3400 is required to be in a pipe blocking state, a robot enters a drain pipe, and after the dredging device 200 cleans out a blocking area, the multi-chamber airbag 3400 is separated from the traveling device 100. Simultaneously, the balloon inflation and deflation device 500 inflates the multi-chamber balloon 3400, and the multi-chamber balloon 3400 inflates to a set pressure to seal the pipeline.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

The above-described embodiments merely represent embodiments of the invention, the scope of the invention is not limited to the above-described embodiments, and it is obvious to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims (10)

1. The underground air bag plugging device is characterized by comprising a multi-chamber air bag (3400) and an air bag charging and discharging device (500); the multi-chamber airbag (3400) comprises two independent airbag chambers (300) which are connected in sequence, and a transition chamber (400) is arranged between the two independent airbag chambers (300); wherein each independent airbag compartment (300) comprises a cylinder (310), a front plug (320) and a rear plug (330), and the front plug (320) and the rear plug (330) are respectively connected with two ends of the cylinder (310); the multi-chamber airbag (3400) further comprises a sealing connection disc (340) and an air nozzle (360), wherein the sealing connection disc (340) is detachably connected with the front plug (320), and the sealing connection disc (340) is provided with a straight-through air nozzle (350); the straight-through air tap (350) is connected with the air tap (360) through a connecting pipe (370);

the airbag charging and discharging device (500) comprises a charging and discharging device (510), a monitoring device (520) and a multi-core air pipe assembly (530), wherein the charging and discharging device (510) is connected with the straight-through air tap (350) through the multi-core air pipe assembly (530) or the monitoring device (520) is connected with the straight-through air tap (350) through the multi-core air pipe assembly (530) according to the working state of the multi-chamber airbag (3400);

the multi-chamber airbag (3400) is provided with folds, the airbag charging and discharging device (500) charges and discharges the independent airbag cabin (300) and the transition chamber (400) independently according to the charging and discharging sequence, and the multi-chamber airbag (3400) deforms according to the direction set by the folds when the airbag is discharged.

2. The downhole balloon occlusion device of claim 1, wherein the number of gas nozzles (360) is plural, the gas nozzles (360) being fixedly located on the rear plugs (330) of the individual balloon chambers (300) directly connected to the balloon inflation and deflation device (500), and further located on the front plugs (320) of the individual balloon chambers (300) indirectly connected to the balloon inflation and deflation device (500), respectively.

3. The downhole balloon occlusion device according to claim 2, wherein an axial middle crease (311) and a radial crease (312) and an axial outer rim crease (313) are provided on the multi-chamber balloon (3400); wherein the axial intermediate crease (311) is located between a central axis of the multi-chamber balloon (3400) and an outer edge of the multi-chamber balloon (3400); -said axial outer edge fold (313) is located at the outer edge of said multi-chamber balloon (3400); the radial folds (312) are located on the aft independent airbag compartment (300); the crease direction of the axial middle crease (311) and the axial outer crease (313) is folded toward the central axis direction of the multi-chamber airbag (3400).

4. A downhole balloon occlusion device according to claim 3, wherein occlusion radial folds (3230) are provided on both the front occlusion (320) and the rear occlusion (330), the occlusion radial folds (3230) being located in intermediate positions of the front occlusion (320) and the rear occlusion (330), respectively, and the occlusion radial folds (3230) having a length smaller than the diameter of the barrel (310); the folding direction of the blocking radial crease (3230) is the inward concave direction of the front blocking (320) and the rear blocking (330) of each independent air bag cabin (300) to the cylinder body (310).

5. The downhole balloon occlusion device of claim 4, wherein upon venting of said multi-chamber balloon (3400), deforms in a direction set by the folds, comprising: the independent airbag compartments (300) are deflated, the independent airbag compartments are folded towards the central axis direction of the multi-chamber airbag (3400) according to the axial middle folds (311), meanwhile, the front plugs (320) and the rear plugs (330) of each independent airbag compartment (300) are inwards concave towards the cylinder (310) according to the folding direction of the radial folds (3230) of the plugs, the connecting pipes (370) located in the transition chamber (400) are stretched, and the connecting pipes (370) located in the independent airbag compartments (300) directly connected with the airbag charging and discharging device (500) are contracted and deformed.

6. The downhole balloon occlusion device of claim 5, wherein the sequential inflation of the multi-chamber balloon (3400) is: the sequence in which the independent airbag chambers (300) and the transition chamber (400) are connected in sequence; the sequence of the multi-chamber airbag (3400) when being exhausted is as follows: the individual airbag compartments (300) are arranged first, followed by the transition chamber (400).

7. The downhole balloon plugging device of claim 6, wherein the inflation and deflation device (510) comprises an air supply device (511), an air reservoir (512), an air pressure gauge (513), a vacuum generator (514), a switch valve body (515), and a multi-channel air distribution device (516); the air storage tank (512) is respectively connected with the air source device (511) and the vacuum generator (514); the vacuum generator (514) is connected with an inlet of the multi-pipeline gas distribution device (516), a first thimble straight-through joint (5120) is arranged on an outlet of the multi-pipeline gas distribution device (516), and the multi-core gas pipe assembly (530) is connected with the first thimble straight-through joint (5120) in a pipe joint way; the barometer (513) is connected with the air storage tank (512), and the switch valve body (515) is connected with the vacuum generator (514).

8. The downhole balloon occlusion device of claim 7, wherein the multicore tracheal assembly (530) comprises multicore unidirectional joints (531), multicore tracheal (532), and a third multicore straight-through joint (533); the two ends of the multicore air pipe (532) are respectively connected with the multicore one-way joint (531) and the third multicore straight-through joint (533) in a pipe joint mode, the other end of the multicore one-way joint (531) is connected with the first thimble straight-through joint (5120) or is connected with the second thimble straight-through joint (5121) of the monitoring device (520) in a pipe joint mode, and the other end of the third multicore straight-through joint (533) is connected with the straight-through air nozzle (350) in a pipe joint mode.

9. The downhole balloon occlusion device of claim 8, wherein when a pipeline occlusion state of the multi-chamber balloon (3400) is required, the gas source device (511) is turned on, the switch valve body (515) is turned off, the multi-pipeline gas distribution device (516) is turned on, the gas source device (511) inflates the multi-chamber balloon (3400) through the vacuum generator (514), the multi-pipeline gas distribution device (516) and the multi-chamber gas pipe assembly (530), and the multi-chamber balloon (3400) inflates to a set pressure to occlude a pipeline.

10. The downhole balloon occlusion device of claim 8, wherein when removal of said multi-chamber balloon (3400) vent is desired, said monitoring device (520) is removed and the inflation and deflation device (510) is reconnected; opening the switch valve body (515), opening the multi-pipeline gas distribution device (516), and taking the gas source device (511) out of the plugging pipeline by sucking gas from the multi-chamber gas bag (3400) through the vacuum generator (514) and discharging the gas from the vacuum generator (514) by the multi-pipeline gas distribution device (516), wherein the suction volume of the multi-chamber gas bag (3400) is reduced.