A downhole plugging airbag charging and discharging system

Abstract

The application discloses a downhole plugging air bag charging and discharging system, 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 chambers which are connected in sequence and have a transition chamber between the two independent air bag chambers; the air bag charging and discharging device comprises a charging and discharging device, a monitoring device and a multi-core air pipe assembly; according to the working state of the multi-chamber air bag, the charging and discharging device is connected with the multi-chamber air bag or the monitoring device is connected with the multi-chamber air bag; the air bag charging and discharging device independently charges and discharges the independent air bag chambers and the transition chamber according to a charging and discharging sequence. Through the downhole plugging air bag charging and discharging system, each chamber of the multi-chamber air bag can be independently sealed and individually charged and discharged, so that, after the air bag in a certain chamber is punctured, the other chambers are prevented from being synchronously discharged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline plugging, in particular to a downhole plugging air bag inflation and deflation system. BACKGROUND

[0002] At present, the operations such as dredging, detection, repair and closed water test of the drainage pipeline all need to plugging the pipeline port by air bag. The plugging air bag is an air core product made of rubber or PVC mesh material through bonding process, which is inflated by compressed air to realize plugging on the wall of the drainage pipeline, and is the most commonly used pipeline plugging tool. The commonly used air bag is a single chamber structure. In the complex drainage pipeline environment, there are a large number of silt, household garbage and construction waste and other objects, plus material, processing and external force factors, which are easy to cause air bag leakage and even burst, resulting in plugging failure, which seriously affects the safety of construction personnel and equipment. The irregular shape and size of the air bag after exhaust are not convenient for frogmen to carry, and are even less suitable for robots to carry out construction.

[0003] Prior art, patent No. CN106944776A, a plugging device for welding internal protective gas of pipeline, including quick connector and front air bag, built-in hose, gas screen, quick ball valve, pressure reducing valve, protective sleeve and rear air bag together constitute. One end of the front air bag is provided with two groups of air nozzles, and one group of air nozzles is arranged at the other end of the front air bag and connected with the gas 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 the rubber hose. The front air bag and the rear air bag are arranged in the inner wall on the left and right sides of the two groups of pipeline welding ports respectively, and the front air bag and the rear air bag are connected by the rubber hose. The built-in hose is arranged in the front air bag, and the built-in hose is connected with one group of air nozzles arranged at one end of the outer wall of the front air bag, and the built-in hose is connected with the gas screen arranged at the other end of the front air bag. Prior art, two air bags are inflated and deflated synchronously, and a single air bag cannot be inflated and deflated independently and sealed. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the problem that a single air bag cannot be inflated and deflated independently and sealed in a multi-chamber air bag.

[0005] To solve the above technical problems, the present application provides the following technical scheme:

[0006] A downhole plugging air bag inflation and deflation system, comprising a multi-chamber air bag (3400) and an air bag inflation and deflation device (500); the multi-chamber air bag (3400) comprises two independent air bag chambers (300) connected in sequence, and has a transition chamber (400) between the two independent air bag chambers (300);

[0007] The air bag charging and discharging device (500) comprises a charging and discharging device (510), a monitoring device (520) and a multi-chamber air pipe assembly (530), and the charging and discharging device (510) is connected with the multi-chamber air bag (3400) or the monitoring device (520) is connected with the multi-chamber air bag (3400) according to the working state of the multi-chamber air bag (3400).

[0008] The air bag charging and discharging device (500) independently charges and discharges the independent air bag chamber (300) and the transition chamber (400) according to the charging and discharging sequence.

[0009] Advantages: The chambers of the multi-chamber air bag are independently sealed and separately charged and discharged, preventing the air bag in a certain chamber from being punctured and the other chambers from being simultaneously deflated, and preventing the position of the independent air bag chamber from being changed when the transition chamber is punctured, resulting in failure of inflation and plugging.

[0010] In an embodiment of the present application, each independent air bag chamber (300) comprises a cylinder (310), a front plug (320) and a rear plug (330), the front plug (320) and the rear plug (330) are respectively connected with both ends of the cylinder (310); the multi-chamber air bag (3400) further comprises a sealing adapter (340) and an air nozzle (360), the sealing adapter (340) is detachably connected with the front plug (320), and a straight-through air nozzle (350) is arranged on the sealing adapter (340); the straight-through air nozzle (350) is connected with the air bag charging and discharging device (500), and the straight-through air nozzle (350) is connected with the air nozzle (360) through a connecting pipe (370).

[0011] In an embodiment of the present application, the number of air nozzles (360) is multiple, 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 are also arranged on the front plugs (320) of the independent air bag chambers (300) indirectly connected with the air bag charging and discharging device (500).

[0012] In an embodiment of the present application, the charging sequence of the multi-chamber air bag (3400) is that the independent air bag chambers (300) and the transition chamber (400) are sequentially connected; and the discharging sequence of the multi-chamber air bag (3400) is that the independent air bag chambers (300) are discharged first, and then the transition chamber (400) is discharged.

[0013] In an embodiment of the present application, the charging and discharging device (510) comprises a gas source device (511), a gas storage tank (512), a gas pressure gauge (513), a vacuum generator (514), a switch valve body (515) and a multi-pipeline gas distribution device (516); the gas storage tank (512) is connected with the gas source device (511) and the vacuum generator (514) respectively; the vacuum generator (514) is connected with an inlet of the multi-pipeline gas distribution device (516), an outlet of the multi-pipeline gas distribution device (516) is provided with a first needle straight joint (5120), and the multi-core gas tube assembly (530) is connected with the first needle straight joint (5120); the gas pressure gauge (513) is connected with the gas storage tank (512), and the switch valve body (515) is connected with the vacuum generator (514).

[0014] In an embodiment of the present application, the monitoring device (520) comprises a pressure display assembly (521), a pressure measurement assembly (522), a siren (523), a warning light (524) and a second needle straight joint (5121); the siren (523) and the warning light (524) are both connected with the pressure display assembly (521), and the pressure measurement assembly (522) is connected with the pressure display assembly (521) and the second needle straight joint (5121) respectively; the second needle straight joint (5121) is connected with the multi-core gas tube assembly (530).

[0015] In an embodiment of the present application, the multi-core gas tube assembly (530) comprises a multi-core one-way joint (531), a multi-core gas tube (532) and a third multi-core straight joint (533); two ends of the multi-core gas tube (532) are connected with the multi-core one-way joint (531) and the third multi-core straight joint (533) respectively, the other end of the multi-core one-way joint (531) is connected with the first needle straight joint (5120) or the second needle straight joint (5121) of the monitoring device (520), and the other end of the third multi-core straight joint (533) is connected with the straight-through air nozzle (350).

[0016] In an embodiment of the present application, when the multi-chamber air bag (3400) needs to be in a pipeline blocking state, the gas source device (511) is started, the switch valve body (515) is closed, the multi-pipeline gas distribution device (516) is started, and the gas source device (511) inflates the multi-chamber air bag (3400) through the vacuum generator (514), the multi-pipeline gas distribution device (516) and the multi-core gas tube assembly (530), so that the multi-chamber air bag (3400) expands to a set pressure to block the pipeline.

[0017] In an embodiment of the present application, when the multi-chamber air bag (3400) is in the pressure maintaining and blocking state, the quick plug joint between the charging and discharging device (510) and the multi-core tracheal assembly (530) is disconnected after the multi-chamber air bag (3400) is inflated to the blocking state, and the charging and discharging device (510) is removed, the multi-chamber air bag (3400) is in the pressure maintaining and blocking state; the monitoring device (520) and the multi-core tracheal assembly (530) are connected, so that the air pressure of each chamber is independently displayed, and the pressure is lower than the set safety value and the sound and light alarm is sounded.

[0018] In an embodiment of the present application, when the multi-chamber air bag (3400) needs to be exhausted, the monitoring device (520) is removed, and after the charging and discharging device (510) is reconnected; the switch valve body (515) is opened, the multi-pipeline gas distribution device (516) is opened, the air source device (511) is connected to the multi-chamber air bag (3400) through the vacuum generator (514) and the multi-pipeline gas distribution device (516), and the vacuum generator (514) is connected to the multi-chamber air bag (3400) through the multi-pipeline gas distribution device (516), and the multi-chamber air bag (3400) is connected to the multi-chamber air bag (3400) through the multi-pipeline gas distribution device (516).

[0019] Compared with the prior art, the present application has the following advantages:

[0020] Through the combination of the electromagnetic valve or the multi-pipeline gas distribution and the monitoring device, the pressure of each gas chamber is independently detected. Through the wireless communication connection of the mobile terminal, remote monitoring is realized through the mobile terminal. The sound and light alarm prevents the air bag from bursting or blocking failure caused by excessive or low air pressure, and solves the safety accidents caused by the leakage and pressure reduction during the air bag pressure maintaining and blocking.

[0021] Through the vacuum generator and the switch valve body, intelligent charging and discharging are realized. When the switch valve body is closed, the vacuum generator is equivalent to a straight-through valve, and the air output by the air compressor and the air tank is supplied to the air bag through the combined two-position two-way electromagnetic valve and the multi-core needle straight-through joint, so that the air bag is inflated to block the pipeline. When the switch valve body is opened, the vacuum generator works, and the vacuum is extracted in reverse through the combined two-position two-way electromagnetic valve, so that the deflated air bag is realized. The vacuum generator is equipped with a switch valve body to realize the conversion of positive and negative pressure output. One set of air compressor replaces the vacuum pump, reduces the cost, simplifies the structure, and is convenient for transportation.

[0022] The straight-through air nozzle is used for quick connection with the multi-core tracheal assembly for air bag inflation and deflation. The inner and outer connecting discs clamp the air bag blocking layer and are buckled. The clamping surface is designed with a matching circumferential concave-convex ring groove to clamp the air bag blocking layer and enhance the sealing performance.

[0023] Unequal distance three cabin design, both to solve the problem of safety plugging, and to reduce the length of the air bag, convenient to carry in and out of the shaft. Unequal distance three cabin layout, two large cabin room, small cabin room in the middle, a single large cabin room can meet the plugging capacity requirements. When the air bag is not leaking, the three cabin rooms are simultaneously inflated in the inner wall of the drainage pipeline, increasing the safety factor. When a single cabin leaks or an external object pierces a certain partition in the middle, causing the small cabin room in the middle and the adjacent large cabin room to leak, the remaining large cabin room will normally plug. The middle design of the small cabin room relative to the three large cabin rooms shortens the length of the air bag, and also ensures that the adjacent two cabin rooms do not affect the safety plugging when they leak.

[0024] By appropriately lengthening the length of the middle cabin room, the air pipe can meet the deformation requirement of the partition to the two sides when the air bag is deflated.

[0025] To ensure that the folded state of the air bag does not resist the pipe wall when inflated, and to ensure that the transition chamber gas pipe cannot be stretched, the inflation sequence is: independent air bag chamber and transition chamber are connected in sequence. To ensure that the air bag can be flattened when deflated, the sequence of deflation is: first to the independent air bag chamber, and then to the transition chamber.

[0026] To prevent the middle partition from being irregularly stacked together to form a bulge when the air bag is inflated and deflated, affecting the folding of the air bag, the axial middle crease, the axial outer edge crease and the plugging radial crease play a guiding role. When the air bag is inflated and deflated, the plugging radial crease deforms in the direction set by the crease.

[0027] The straight-through air nozzle is used for quick connection with the multi-core air pipe assembly for air bag inflation and deflation. The inner and outer disc clamps the air bag plugging layer to be buckled, and the clamping surface is designed with a matching circumferential concave-convex ring groove to clamp the air bag plugging layer and enhance the sealing performance.

[0028] The dredging device cuts the hard sludge deposited at the bottom of the drainage pipeline into small pieces and mixes it with water to form slurry, which is pumped out and discharged outside the plugging area. Solid small particles of garbage are mixed with sludge by the dredging device to form slurry, which is pumped out and discharged by the slurry pump, and solid large pieces of garbage are pushed out of the plugging area by the dredging device. The dredging device cleans the plugging area, and the multi-chamber air bag is used to plug the pipeline in the plugging area, and both are integrated on the walking device to improve industrial efficiency. The dredging device cleans out the building sharp objects or walling residues in the plugging area to avoid the multi-chamber air bag being pierced, further improving the reliability of the air bag plugging

[0029] The suction hopper is hinged to the lower part of the walking device and is connected to the suction port of the mud pump through a hose by a soft connection, so that the suction hopper can swing upward around the hinge point. The dredging device is pressed on the accumulated material by its own gravity to cut and mix the sludge, preventing the robot body from pressing on the spiral roller to cause too much rotational driving resistance, and preventing the spiral roller from encountering high-hardness garbage to cause the rear walking wheels of the dredging device and the walking device to be supported and the middle and front walking wheels to be suspended, thereby greatly reducing the walking driving force of the robot.

[0030] The spiral blades are conically wound on the roller, and the spiral directions of the pair of spiral blades are opposite, so that the diameter of the spiral roller is the largest at the middle position in the longitudinal direction, and the largest diameter of the spiral roller is opposite to the suction port. The hard accumulated material at the bottom of the drainage pipeline is cut and mixed with water into a paste-like slurry by the rotation of the spiral blades, and the slurry is collected from both sides to the middle position opposite to the suction port by the rotation of the spiral blades with different spiral directions on the left and right, and is sucked and discharged by the mud pump.

[0031] The height of the pair of spiral blades and the upper radius difference formed by the arc side of the front baffle are greater than the height of the pair of spiral blades and the lower radius difference formed by the arc side of the bottom plate. The suction hopper is arranged in an "eccentric funnel type", and the radius difference between the spiral roller and the front baffle and the bottom plate is large at the top and small at the bottom, which is suitable for loose feeding and damping discharging, realizes the characteristics of large feeding space at the top and small discharging space at the bottom, reduces invalid dredging, and improves the dredging efficiency. The suction port is a front large rear small necking, which generates a certain guiding extrusion force on the sludge.

[0032] The pitch of each spiral blade and the upper radius difference are set according to the solid particle passing capacity of the mud pump, and the upper radius difference is designed to be smaller than the solid particle passing capacity of the mud pump, which plays a blocking role on larger solid particles. When there are larger solid particles stuck between the spiral blade and the suction hopper, they are extruded by the reverse rotation of the spiral roller. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a downhole sealing air bag charging and discharging system schematic diagram of an embodiment of the present application.

[0034] Figures 2 to 5 It is an air bag charging and discharging device schematic diagram of an embodiment of the present application.

[0035] Figure 6 It is a multi-chamber air bag schematic diagram of an embodiment of the present application.

[0036] Figure 7 And Figure 8 It is a multi-chamber air bag schematic diagram of an embodiment of the present application.

[0037] Figure 9 It is a local enlarged view of a sealing joint disc of an embodiment of the present application.

[0038] Figure 10 and Figure 11 Folding diagram of the embodiment of the present application.

[0039] Figures 12 to 14 Folding diagram of the embodiment of the present application.

[0040] Figure 15 and Figure 16 Folding diagram of the embodiment of the present application.

[0041] Figure 17 Diagram of the embodiment 2 of the present application.

[0042] Figure 18 and Figure 19 Diagram of the embodiment of the present application.

[0043] Figure 20 Diagram of the embodiment of the present application.

[0044] Figure 21 Diagram of the embodiment of the present application.

[0045] Figure 22 Diagram of the embodiment of the present application.

[0046] Figure 23 Diagram of the embodiment of the present application.

[0047] Figure 24 Diagram of the embodiment of the present application.

[0048] Figure 25 Diagram of the embodiment of the present application.

[0049] Figure 26 Diagram of the embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to help the skilled in the art to understand the technical solutions of the present application, the technical solutions of the present application will be further described in combination with the drawings of the specification.

[0051] The terms "first", "second", "third", etc. are only used for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0052] Embodiment 1

[0053] Please refer to Figures 1 to 8As shown, the application provides a downhole sealing airbag inflation and deflation system, which comprises a multi-chamber airbag 3400 and an airbag inflation and deflation device 500. The multi-chamber airbag 3400 comprises two independent airbag chambers 300 connected in sequence, and a transition chamber 400 between the two independent airbag chambers 300. The airbag inflation and deflation device 500 comprises an inflation and deflation device 510, a monitoring device 520, and a multi-core air pipe assembly 530. According to the working state of the multi-chamber airbag 3400, the inflation and deflation device 510 is connected with the multi-chamber airbag 3400 or the monitoring device 520 is connected with the multi-chamber airbag 3400. The airbag inflation and deflation device 500 independently inflates and deflates the independent airbag chambers 300 and the transition chamber 400 according to the inflation and deflation sequence.

[0054] As shown, Figures 1 to 8 In an embodiment of the application, the inflation and deflation device 510 comprises an air source device 511, a gas storage tank 512, a gas pressure gauge 513, a vacuum generator 514, a switch valve body 515, and a multi-pipeline gas distribution device 516. The gas storage tank 512 is connected with the air source device 511 and the vacuum generator 514 respectively, the multi-pipeline gas distribution 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 gas distribution device 516. The gas pressure gauge 513 is connected with the gas storage tank 512. The air source device 511 compresses air (positive pressure), the gas storage tank 512 stores the compressed air, and the gas pressure gauge 513 is used to display the pressure of the compressed air in real time. The switch valve body 515 is connected with the vacuum generator 514. The vacuum generator 514 generates a vacuum suction force (negative pressure) when high-pressure air flows through, and the switch valve body 515 is used to open or close the exhaust port of the vacuum generator 514. The multi-pipeline gas distribution device 516 is used to open or close the air path between the multi-chamber airbag 3400. A first needle straight 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 device, and the multi-pipeline gas distribution device is straight and divides one path into multiple paths. Specifically, the multi-pipeline gas distribution device 516 has several pipelines, which are determined according to the number of independent airbag chambers 300 and the transition chamber 400. The air source device 511 is, for example, an air compressor.

[0055] As shown, Figures 1 to 8As shown, in one 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 pin connector 5121. The siren 523 and the warning light 524 are both connected to the pressure display component 521, and the pressure measuring component 522 is connected to both the pressure display component 521 and the second pin connector 5121. The pressure display component 521 monitors the pressure holding status of the multi-chamber airbag 3400 through the second pin connector 5121, whereby each chamber is tested by its corresponding pressure measuring component 522, and the pressure value of each chamber is displayed on the pressure display component 521. When the pressure is lower than a set safety value, the siren 523 and the warning light 524 simultaneously activate to issue an audible and visual alarm. Specifically, the pressure measuring component 522 is a pressure sensor.

[0056] Please see Figures 1 to 8 As shown, in one embodiment of the present invention, the multi-core air tube assembly 530 includes a multi-core one-way connector 531, a multi-core air tube 532, and a third multi-core straight connector 533. The two ends of the multi-core air tube 532 are connected to the multi-core one-way connector 531 and the third multi-core straight connector 533, respectively. The other end of the multi-core one-way connector 531 is connected to either the first ejector pin straight connector 5120 or the second ejector pin straight connector 5121. The other end of the third multi-core straight connector 533 is connected to the straight nozzle 350. The multi-core one-way connector 531 is a one-way valve assembly and is in a closed state when not connected to other components. During operation, the airbag inflation / deflation device 500 is located above the well, and the multi-chamber airbag 3400 is located below the well.

[0057] Please see Figures 1 to 8 As shown, in one embodiment of the present invention, when the multi-chamber airbag 3400 needs to be in a pipe-blocking state, the robot enters the drain pipe, and the multi-chamber airbag 3400 separates from the walking device 100. Simultaneously, the air source device 511 is activated, the switch valve 515 is closed, and the multi-pipe air distribution device 516 is activated. The air source device 511 inflates the multi-chamber airbag 3400 through the vacuum generator 514, the multi-pipe air distribution device 516, and the multi-core air tube assembly 530, causing the multi-chamber airbag 3400 to expand to a set pressure to block the pipe.

[0058] Please see Figures 1 to 8 As shown, in one embodiment of the present invention, when the multi-chamber airbag 3400 is in a pressure-holding and sealing state, after the multi-chamber airbag 3400 inflates to the sealing state, the quick-connect connector between the inflation / deflation device 510 and the multi-core air tube assembly 530 is disconnected, and the inflation / deflation device 510 is removed, leaving the multi-chamber airbag 3400 in a pressure-holding and sealing state. The monitoring device 520 is connected to the multi-core air tube assembly 530, allowing independent display of the air pressure in each chamber, with an audible and visual alarm triggered when the pressure falls below a set safety value. The inflation / deflation device 510 can also be wirelessly connected to a mobile terminal for remote monitoring.

[0059] Please refer to Figures 1 to 8 As shown in the embodiment of the present application, when the multi-chamber air bag 3400 needs to be exhausted and removed, the monitoring device 520 is removed, and the charging and discharging device 510 is reconnected. The switch valve body 515 is opened, the multi-pipeline gas distribution device 516 is opened, the air source device 511 sucks air from the multi-chamber air bag 3400 through the vacuum generator 514 and the multi-pipeline gas distribution device 516, and discharges the air by the vacuum generator 514, so that the volume of the multi-chamber air bag 3400 is reduced, and the multi-chamber air bag 3400 is removed from the plugging pipeline.

[0060] Please refer to Figure 6 and Figure 9 As shown in the embodiment of the present application, each independent air bag chamber 300 includes a cylinder body 310, a front plugging 320, and a rear plugging 330, and the front plugging 320 and the rear plugging 330 are respectively connected to two ends of the cylinder body 310. The multi-chamber air bag 3400 further includes a sealing adapter plate 340 and a gas nozzle 360, the sealing adapter plate 340 is detachably connected to the front plugging 320, and the sealing adapter plate 340 is provided with a straight-through gas nozzle 350, and the straight-through gas nozzle 350 is connected to the gas nozzle 360 through a connecting pipe 370.

[0061] Please refer to Figure 6 and Figure 9 As shown in the embodiment of the present application, the number of the gas nozzles 360 is multiple, and the gas nozzles 360 are respectively fixed on the rear pluggings 330 of the independent air bag chambers 300 which are directly connected to the air bag charging and discharging device 500, and are also located on the front pluggings 320 of the independent air bag chambers 300 which are indirectly connected to the air bag charging and discharging device 500. The number of the straight-through gas nozzles 350 is determined according to the number of the independent air bag chambers 300 and the transition chamber 400, and the straight-through gas nozzles 350 are respectively connected to the air bag charging and discharging device 500 and the gas nozzle 360 through the connecting pipe 370, so as to charge and discharge the independent air bag chambers 300 and the transition chamber 400.

[0062] Please refer to Figure 6 and Figure 9 As shown in the embodiment of the present application, in order to meet the requirements of air bag charging and air deformation and the length change of the air pipe, the connecting pipe 370 is, for example, a spiral telescopic air pipe. The independent air bag chambers 300 and the transition chamber 400 are arranged in an unequal distance three-chamber layout, the independent air bag chambers 300 at two ends are large chambers, and the transition chamber 400 is a small chamber. The multi-chamber air bag 3400 is designed in an unequal distance three-chamber layout, which not only solves the problem of safe plugging, but also reduces the length of the air bag, facilitates carrying in and out of the shaft, and in the embodiment, the length of the multi-chamber air bag 3400 is less than 2 meters. In addition, under the premise that the multi-chamber air bag 3400 does not appear wrinkles on the pipe wall, the outer diameter of the cylinder body 310 is slightly larger than the inner diameter of the pipeline, so as to improve the air bag anti-burst and anti-puncture capacity.

[0063] Please refer to Figure 6 and Figure 9As shown, in one embodiment of the present invention, the sealing plate 340 includes an inner plate 341 and an outer plate 342. The inner plate 341 and the outer plate 342 are detachably connected and clamped together with the front seal 320. The clamping surfaces of the inner plate 341 and the outer plate 342 are provided with matching circumferential grooves 3412. The straight air nozzle 350 is fixedly connected to the inner plate 341.

[0064] Please see Figure 6 , Figures 9 to 11 As shown, in one embodiment of the present invention, an axial intermediate crease 311, a radial crease 312, and an axial outer edge crease 313 are provided on the multi-chamber airbag 3400. The axial intermediate crease 311 is located between the central axis of the multi-chamber airbag 3400 and its outer edge. The axial outer edge crease 313 is located at the outer edge of the multi-chamber airbag 3400. The radial crease 312 is located on the independent airbag compartment 300 at the tail, that is, on the independent airbag compartment 300 indirectly connected to the airbag inflation / deflation device 500. The creases of the axial intermediate crease 311 and the axial outer edge crease 313 are folded towards the central axis of the multi-chamber airbag 3400.

[0065] Please see Figure 6 , Figures 9 to 11 As shown, in one embodiment of the present invention, sealing radial creases 3230 are provided on both the front seal 320 and the rear seal 330. The sealing radial creases 3230 are located at the middle positions of the front seal 320 and the rear seal 330, respectively, and the length of the sealing radial creases 3230 is less than the diameter of the cylinder 310. The folding direction of the sealing radial creases 3230 is inwardly concave towards the cylinder 310 from the front seal 320 and the rear seal 330 of each independent airbag compartment 300.

[0066] Please see Figure 6 , Figures 9 to 14As shown in the embodiment of the present application, before the robot goes down the well, the multi-chamber air bag 3400 is folded, first laid flat, then folded in half along the axial middle crease 311, folded in half again along the radial crease 312, and bound by the plastic wrapping tape 302. The bound multi-chamber air bag 3400 is fixed on the walking device 100 by the hanging ring 301, and is pulled in and out of the inspection well by the front hanging belt 303 on the multi-chamber air bag 3400, and is fixed at the well mouth to prevent the multi-chamber air bag 3400 from being washed away by water. When the multi-chamber air bag 3400 is separated from the walking device 100, the air bag inflation and deflation device 500 inflates the multi-chamber air bag 3400 at the same time, to ensure that the rear folded part does not rest against the pipe wall when the folded air bag is inflated, and that the air pipe of the transition chamber 400 cannot be stretched to affect inflation. The sequence of inflation is that the independent air bag chambers 300 and the transition chamber 400 are connected in sequence. The multi-chamber air bag 3400 is inflated and expanded by the air bag inflation and deflation device 500, breaks through the plastic wrapping tape 302 restraint, and tightens on the pipe wall to complete the plugging.

[0067] As shown in the embodiment of the present application, when the multi-chamber air bag 3400 needs to be deflated, to ensure that the air bag can be laid flat during deflation, the sequence of deflation is: first deflate the independent air bag chambers 300, and then deflate the transition chamber 400. Figure 6 Figures 9 to 16 As shown in the embodiment of the present application, when the multi-chamber air bag 3400 needs to be deflated, to ensure that the air bag can be laid flat during deflation, the sequence of deflation is: first deflate the independent air bag chambers 300, and then deflate the transition chamber 400.

[0068] As shown in the embodiment of the present application, when the multi-chamber air bag 3400 needs to be deflated, to ensure that the air bag can be laid flat during deflation, the sequence of deflation is: first deflate the independent air bag chambers 300, and then deflate the transition chamber 400. Figure 6 Figures 9 to 16 As shown in the embodiment of the present application, to prevent the middle partition from being irregularly stacked together to form a bulge and affect the folding of the air bag during air bag inflation and deflation, the axial middle crease 311, the axial outer edge crease 313, and the plugging radial crease 3230 act as guides, and the plugging radial crease 3230 deforms in the direction set by the crease during inflation and deflation. Among them, the crease can be produced by external cold pressure or high-temperature pressure to achieve plastic permanent deformation.

[0069] When the multi-chamber air bag 3400 is deflated, it deforms in the direction set by the crease, including: the independent air bag chambers 300 are deflated, folded along the axial middle crease 311 towards the central axis of the multi-chamber air bag 3400, and at the same time, the front plugging 320 and the rear plugging 330 of each independent air bag chamber 300 are concave into the cylinder 310 along the folding direction of the plugging radial crease 3230, the connecting pipe 370 located in the transition chamber 400 is stretched, and the connecting pipe 370 located in the independent air bag chamber 300 directly connected with the air bag inflation and deflation device 500 is contracted and deformed.

[0070] Embodiment 2

[0071] ​​In the complex sewer environment, there are a large number of silt, garbage and construction waste and other items, plus material, processing and external factors, which are prone to cause air bag leakage and even burst, resulting in plugging failure. Although the multi-chamber air bag structure can improve the reliability of multi-air bag plugging, if the pipeline is dredged before the air bag plugging, the sharp objects and wall residues are removed, and the dredging is carried out before the air bag plugging, the reliability of the air bag plugging is further improved. In the prior art, the pipeline dredging and the air bag plugging are two independent devices, when working, the dredging device first completes the dredging work and needs to exit the well, and then the air bag plugging is lowered into the well to carry out the air bag plugging, so the working efficiency is low.

[0072] Please refer to Figure 17 In the embodiment, in combination with example 1, a plugging robot is provided, which comprises a walking device 100 and a dredging device 200 located at the front end of the walking device 100, and a multi-chamber air bag 3400 located at the back of the walking device 100. The walking device 100 carries the dredging device 200 and the multi-chamber air bag 3400 into the sewer, the dredging device 200 cleans the plugging area in the sewer, after the cleaning is completed, the multi-chamber air bag 3400 is separated from the walking device 100, the walking device 100 carries the dredging device 200 out of the sewer, and the multi-chamber air bag 3400 is inflated and expanded to be tightly fitted in the sewer wall to plug the pipeline.

[0073] Please refer to Figures 17 to 19 In an embodiment of the present application, the walking device 100 comprises a walking trunk 110 and an air bag connecting device 120 located above the walking trunk 110. The bottom of the walking trunk 110 is provided with a containing space 111, and the mud pump 240 of the dredging device 200 is located in the containing space 111 and is fixedly connected with the walking trunk 110. The tail of the walking trunk 110 is provided with a rear lifting ring 111, and the two sides are provided with magnetic lifting rings 112. When the robot is lowered into the well, it is fixed on the rear lifting ring 111 and the magnetic lifting ring 112 through the lifting rope. When the robot is placed at the bottom of the inspection well through the lifting frame and the lifting rope, the magnetic lifting ring 112 loses power and is separated from the walking trunk 110, and the robot enters the sewer, and the dredging device 200 is started to clean the plugging area.

[0074] Please refer to Figures 17 to 19As shown, in one embodiment of the present invention, the airbag connecting device 120 includes a connecting housing 121, with recesses 122 on both sides of the middle portion of the connecting housing 121, forming a protrusion 123 between the two recesses 122, and a front housing 124 and a rear housing 125 connected to the protrusion 123. The front housing 124 has a sludge inlet 1241, and the rear housing 125 has a sludge outlet 1251. The sludge inlet 1241 communicates with the interior of the protrusion 123 and the sludge outlet 1251 to form a sludge discharge channel. The sludge discharge port 241 of the mud pump 240 is connected to a sludge discharge pipe 242, which passes through the sludge discharge channel to discharge sludge into the drain pipe. The sludge outlet 1251 is located on the rear housing 125 and is connected to the sludge discharge port 241. When the mud pump 240 is working, it generates a large reaction force during the discharge of sludge, which is converted into a forward driving force for the robot, reducing the power of the robot's drive motor.

[0075] Please see Figures 17 to 19 As shown, in one embodiment of the present invention, the airbag connecting device 120 further includes a plurality of pin release components 126 and a roller assembly 127, which are located in the recess 122. The plurality of pin release components 126 are provided with telescopic rods 1261 at their opposite ends to the front housing 124 and the rear housing 125. When the traveling device 100 carries the multi-chamber airbag 3400, the hanging ring 301 on the multi-chamber airbag 3400 is fitted onto the telescopic rod 1261, ensuring that the multi-chamber airbag 3400 and the traveling device 100 are a single unit when lowered into the well. The roller assembly 127 is located between the pin release components 126 and the protrusion 123. When the multi-chamber airbag 3400 detaches from the traveling device 100, the roller assembly 127 and the multi-chamber airbag 3400 experience rolling friction.

[0076] Please see Figures 17 to 19As shown, in one embodiment of the present invention, the telescopic rod 1261 opens, and the multi-chamber airbag 3400 detaches from the traveling device 100. Under conditions of high water level, full water, or large pipe diameter, the multi-chamber airbag 3400 detaches from the traveling device 100 and floats upwards. At this time, the detachment force of the roller assembly 127 is a non-powered roller, which can rotate freely, changing the sliding friction of the incomplete detachment of the multi-chamber airbag 3400 from the traveling device 100 into rolling friction, preventing the traveling device 100 from dragging the multi-chamber airbag 3400 out. The traveling device 100 withdraws from the lower part of the multi-chamber airbag 3400 to the inspection well and is lifted to the inlet by a hoisting rope. The multi-chamber airbag 3400 is inflated by the airbag inflation / deflation device 500, breaking through the plastic tape binding and tightening against the pipe wall, completing the sealing. Under conditions of low water level or small pipe diameter, the detachment force of the roller assembly 127 is a powered roller. When the traveling device 100 releases the multi-chamber airbag 3400 through the release pin assembly 126, the roller assembly 127 rotates in the opposite direction, i.e., in the opposite direction to the exit direction of the traveling device 100, generating a forward force that pushes the multi-chamber airbag 3400 forward, preventing the multi-chamber airbag 3400 from being incompletely detached from the traveling device 100 and thus being completely disengaged. Through the rotational conveying of the roller assembly 127, the multi-chamber airbag 3400 and the traveling device 100 are separated, and the traveling device 100 is withdrawn into the inspection well. The multi-chamber airbag 3400 is inflated by the airbag inflation / deflation device 500, breaking through the plastic tape restraints and tightening onto the pipe wall to complete the seal.

[0077] Please see Figures 17 to 19 As shown, in one embodiment of the present invention, the walking device 100 is capable of turning, moving forward, and moving backward underground. Vehicle body lights 1245 and underground cameras 1246 are provided at both ends of the front housing 124 and the rear housing 125; and a pair of vehicle body lights 1245 are provided on both sides of each underground camera 1246. The pair of vehicle body lights 1245 are staggered at 45° to prevent light reflection from affecting the underground cameras 1246. The underground cameras 1246 are wide-angle cameras used to capture the situation inside the pipeline. A radar (not shown) and a power signal connector 113 are also provided on the walking body 110. The power signal connector 113 connects the dredging device 200, radar, pin removal assembly 126, roller assembly 127, vehicle body lights 1245, underground cameras 1246, and the drive device on the walking device 100 to the controller above ground.

[0078] Please see Figures 18 to 23 As shown, in one embodiment of the present invention, the dredging device 200 includes a suction hopper 210 and a spiral roller 220. The suction hopper 210 is flexibly connected to the connecting housing 121 and hinged to the walking body 110, and the spiral roller 220 is eccentrically assembled with the suction hopper 210.

[0079] Please see Figures 18 to 23As shown, in one embodiment of the present invention, the suction hopper 210 includes a top plate 211, a bottom plate 212, side plates 213, a front baffle 214, a rear baffle 215, and support wheels 216. The two ends of a pair of side plates 213 are respectively connected to the top plate 211 and the bottom plate 212. 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 roller 220. One end of each of the multiple rear baffles 215 is connected to the top plate 211, the bottom plate 212, and the side plates 213, and the other end converges towards the traveling device 100 to form a suction port 230, which is connected to the mud pump 240 via a pipe. A pair of support wheels 216 are respectively connected to a pair of side plates 213, supporting the suction hopper 210 as it moves within the pipe along with the traveling device 100. The top plate 211 is equipped with a hopper connector 2111, which is flexibly connected to the connecting housing 121. The side plate 213 has lugs 2131, which are connected to the walking frame 110 via a sludge-clearing connecting plate 260. Specifically, the sludge-clearing connecting plate 260 is detachably connected to the walking frame 110 and hinged to the lugs 2131. Support wheels 216 position the sludge-clearing device 200 relative to the bottom of the pipe, preventing the spiral blades 222 from scraping against the pipe bottom.

[0080] Please see Figures 18 to 23 As shown, in one embodiment of the present invention, the angle A between the connecting edge of the side plate 213 and the top plate 211 and the 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 slope. The bottom plate 212 is perpendicularly connected to the side plate 213, so that the suction hopper 210 is set in an "eccentric funnel shape", and the sides of the front baffle 214 and the bottom plate 212 near the spiral roller 220 are both set in an arc.

[0081] Please see Figures 18 to 23 As shown, in one embodiment of the present invention, the spiral roller 220 is detachably connected to the suction hopper 210 via a roller mounting plate 250. Multiple sets of adjustment holes 251 are provided on the roller mounting plate 250 to adjust the gap between the spiral roller 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. The pair of spiral blades 222 are conically wound on the roller 221, and their spiral directions are opposite, so that the diameter of the spiral roller 220 is largest at the middle position in the longitudinal direction, and the point of maximum diameter of the spiral roller 220 is directly opposite the suction port 230. During the rotation of the spiral blades 222, the hard silt at the bottom of the drainage pipe 600 is chopped up and stirred with water into a paste-like slurry. Through the rotation of the spiral blades 222 with different spiral directions, the slurry is gathered from both sides towards the middle position directly opposite the suction port 230, and then sucked in and discharged by the slurry pump 240. Figure 24 As shown.

[0082] Please see Figures 18 to 23As shown, in an embodiment of the present application, the drum 221 is provided with a drum motor 2211 and a conductive slip ring 2212, and the drum 221 is sealed by a rotary oil seal and an end cover O-ring on both sides, which is compact in structure and reliable in sealing. 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 roller 220 to rotate.

[0083] As shown, Figures 18 to 23 As shown, in an embodiment of the present application, the maximum radius of the spiral roller 220 is smaller than the radius of the drain pipe, and the support wheel 216 supports the dredging device 200 to keep a certain gap B between the spiral roller 220 and the pipe wall of the drain pipe, so as to avoid scratching the pipe wall when the spiral roller 220 rotates. The height of the pair of spiral blades 222 and the upper radius difference R formed by the arc side of the front baffle 214 are greater than the height of the pair of spiral blades 222 and the lower radius difference (not shown in the figure) formed by the arc side of the bottom plate 212. The suction hopper 210 is arranged in an "eccentric funnel type", the radius difference between the spiral roller 220 and the front baffle 214 and the bottom plate 212 is large at the top and small at the bottom, which is suitable for loose feeding and damping discharging, realizes the characteristics of large feeding space at the top and small discharging space at the bottom, reduces invalid dredging, and improves the dredging efficiency. The suction port 230 is a front large and rear small conical port which generates a certain guiding and extruding force on the sludge.

[0084] As shown, Figures 18 to 23 As shown, in an embodiment of the present application, the pitch D of each spiral blade 222 and the upper radius difference R are set according to the solid particle passing capacity of the slurry pump 240. The upper radius difference R is designed to be smaller than the solid particle passing capacity of the slurry pump 240, which plays a blocking role on larger solid particles. When a larger solid particle is stuck between the spiral blade 223 and the suction hopper 210, it is extruded by the reverse rotation of the spiral roller 220.

[0085] As shown, Figures 18 to 26 As shown, in an embodiment of the present application, when the rotation direction of the spiral roller 220 is opposite to the rotation direction of the traveling wheel 130 of the traveling device 100, larger solid particles can be lifted, rolled and pushed upward during dredging, as shown in Figure 25 As shown, in order to prevent the rotation from climbing over solid waste and being unable to push, the rotation direction of the spiral roller 220 is the same as that of the traveling wheel 130, and at this time, there is no dredging action, as shown in 26. In this embodiment, the maximum solid particle passing capacity of the slurry pump 240 is 20 mm, and the pitch D of the spiral blade 222 and the upper radius difference R are smaller than 20 mm. This can not only ensure that the slurry and solid particles smaller than 20 mm can be sucked away and excluded by the slurry pump 240, but also can block and push away larger solid particles.

[0086] As shown, Figures 1 to 26As shown, in an embodiment of the present application, when the multi-chamber air bag 3400 is needed to be in the pipeline blocking state, the robot enters the sewer, and after the dredging device 200 cleans the blocking area, the multi-chamber air bag 3400 is separated from the walking device 100. At the same time, the air bag inflation and deflation device 500 inflates the multi-chamber air bag 3400, and the multi-chamber air bag 3400 expands to a set pressure to block the pipeline.

[0087] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather that it can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is therefore intended that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced by the application. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0088] The above-described embodiments are merely representative of the present application, and the scope of the present application is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are all within the scope of the present application.

Claims

1. A downhole plugging gasbag inflation and deflation system, characterized in that, It includes a multi-chamber airbag (3400) and an airbag inflation / deflation device (500); the multi-chamber airbag (3400) includes two independent airbag chambers (300) connected in sequence, and a transition chamber (400) is provided between the two independent airbag chambers (300); The airbag inflation / deflation device (500) includes an inflation / deflation device (510), a monitoring device (520), and a multi-core air tube assembly (530). Depending on the working state of the multi-chamber airbag (3400), the inflation / deflation device (510) is connected to the multi-chamber airbag (3400) or the monitoring device (520) is connected to the multi-chamber airbag (3400). 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; The charging and discharging device (510) includes a gas source device (511), a gas storage tank (512), a pressure gauge (513), a vacuum generator (514), a switch valve body (515), and a multi-pipe gas distribution device (516). The gas storage tank (512) is connected to the gas source device (511) and the vacuum generator (514) respectively. The vacuum generator (514) is connected to the inlet of the multi-pipe gas distribution device (516), and a first pin straight connector (5120) is provided on the outlet of the multi-pipe gas distribution device (516). The multi-core gas pipe assembly (530) is connected to the first pin straight connector (5120). The pressure gauge (513) is connected to the gas storage tank (512), and the switch valve body (515) is connected to the vacuum generator (514).

2. The downhole plugging gasbag inflation and deflation system according to claim 1, characterized in that, Each independent airbag compartment (300) includes a cylinder (310), a front plug (320), and a rear plug (330), the front plug (320) and the rear plug (330) being connected to both ends of the cylinder (310), respectively; the multi-chamber airbag (3400) also includes a sealing plate (340) and an air nozzle (360), the sealing plate (340) being detachably connected to the front plug (320), and a straight-through air nozzle (350) being provided on the sealing plate (340); the straight-through air nozzle (350) being pipe-connected to the airbag inflation device (500), and the straight-through air nozzle (350) being pipe-connected to the air nozzle (360) via a connecting pipe (370).

3. The downhole plugging gasbag inflation and deflation system according to claim 2, characterized in that, The number of air nozzles (360) is multiple. The air nozzles (360) are respectively fixed on the rear seal (330) of the independent airbag chamber (300) directly connected to the airbag inflation device (500), and also on the front seal (320) of the independent airbag chamber (300) indirectly connected to the airbag inflation device (500).

4. The downhole plugging gasbag inflation and deflation system according to claim 3, characterized in that, The multi-chamber airbag (3400) is inflated in the following order: the independent airbag chamber (300) and the transition chamber (400) are connected in sequence; the multi-chamber airbag (3400) is deflated in the following order: the independent airbag chamber (300) is deflated first, and then the transition chamber (400) is deflated.

5. The downhole plugging gasbag inflation and deflation system according to claim 4, characterized in that, 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 pin connector (5121); the siren (523) and the warning light (524) are both connected to the pressure display component (521), and the pressure measuring component (522) is connected to the pressure display component (521) and the second pin connector (5121) respectively; the second pin connector (5121) is connected to the multi-core air tube assembly (530).

6. The downhole plugging gasbag inflation and deflation system according to claim 5, characterized in that, The multi-core air tube assembly (530) includes a multi-core one-way connector (531), a multi-core air tube (532), and a third multi-core straight connector (533); the two ends of the multi-core air tube (532) are respectively connected to the multi-core one-way connector (531) and the third multi-core straight connector (533), the other end of the multi-core one-way connector (531) is connected to the first pin straight connector (5120) or to the second pin straight connector (5121) of the monitoring device (520), and the other end of the third multi-core straight connector (533) is connected to the straight nozzle (350).

7. The downhole plugging gasbag inflation and deflation system according to claim 6, characterized in that, When the multi-chamber airbag (3400) needs to be in a pipeline blocking state, the gas source device (511) is turned on, the switch valve body (515) is closed, the multi-pipe gas distribution device (516) is turned on, and the gas source device (511) inflates the multi-chamber airbag (3400) through the vacuum generator (514), the multi-pipe gas distribution device (516) and the multi-core air tube assembly (530), and the multi-chamber airbag (3400) expands to the set pressure to block the pipeline.

8. The downhole plugging gasbag inflation and deflation system according to claim 7, characterized in that, When the multi-chamber airbag (3400) is in a pressure-holding and sealing state, after the multi-chamber airbag (3400) inflates to the sealing state, the quick-connect connector between the inflation / deflation device (510) and the multi-core air tube assembly (530) is disconnected, and the inflation / deflation device (510) is removed, so that the multi-chamber airbag (3400) is in a pressure-holding and sealing state; the monitoring device (520) and the multi-core air tube assembly (530) are connected so that the air pressure of each chamber is displayed independently, and an audible and visual alarm is triggered when the pressure is lower than the set safety value.

9. The downhole plugging gasbag inflation and deflation system according to claim 8, characterized in that, When the multi-chamber airbag (3400) needs to be vented and removed, the monitoring device (520) is removed and the filling and discharging device (510) is reconnected; the switch valve body (515) is opened and the multi-pipe gas distribution device (516) is turned on. The gas source device (511) draws air from the multi-chamber airbag (3400) through the vacuum generator (514) and the multi-pipe gas distribution device (516) and discharges it through the vacuum generator (514). The multi-chamber airbag (3400) deflates and becomes smaller, and is then removed from the blocked pipe.

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