Spraying repairing device for inner wall of pipeline

Abstract

The utility model provides a spraying repairing device for the inner wall of a pipeline. The spraying repairing device comprises a lifting device, a rotating device and a spraying device. The lifting device is used for adjusting the distance between the spraying device and the inner wall of the pipeline; the rotating device is arranged on the lifting device and connected with the spraying device through a telescopic device so as to drive the spraying device to rotate in the circumferential direction of the pipeline to be sprayed, and the telescopic device is used for adjusting the distance between the spraying device and the rotating device; the spraying device comprises an air conveying pipe, a material conveying assembly and a spraying gun, the spraying gun is arranged on the rotating device through a telescopic device, and the air conveying pipe and the material conveying assembly are both connected with the spraying gun. The spraying device can solve the problem that spraying of the inner walls of pipelines at different positions is not uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline inner wall spraying repair, in particular to a pipeline inner wall spraying repair device. Background Art

[0002] Due to the long-term influence of various loads, groundwater, sewage and other factors, most urban underground pipelines will be damaged for various reasons before reaching the design life, thus causing various problems such as pipeline leakage and ground collapse, posing a great threat to people's daily life and personal safety. At present, the existing technology generally adopts rotary centrifugal spray repair technology to build a new lining layer such as cement mortar, epoxy resin or polyurethane on the inner wall of the pipe to repair the pipeline. However, the rotary centrifugal spray repair device in the prior art has uneven spraying thickness, which affects the pipeline repair effect and causes a large waste of spraying slurry.

[0003] The invention with publication number CN114643149A discloses a trenchless large-diameter pipeline repair automatic spraying system and method, including: a walking mechanism, which can walk in the length direction of the pipeline to be sprayed; a sliding mechanism, which is slidably arranged on the walking mechanism so that it can slide back and forth along the length direction of the pipeline to be sprayed; and a rotating mechanism, which is arranged on the sliding mechanism and connected to the sprayer to drive the sprayer to rotate circumferentially along the pipeline to be sprayed, and then spray slurry on the inner wall of the pipeline, but the rotation center of the above-mentioned spraying system cannot be adjusted, the spraying radius of the slurry is limited by the diameter of the pipeline, and there is uneven spraying on the inner wall of the pipeline at different positions. Utility Model Content

[0004] The utility model aims to solve the defects in the prior art and provide a spraying repair device for the inner wall of a pipeline to solve the problem of uneven spraying of the inner wall of the pipeline at different positions.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a spraying repair device for the inner wall of a pipeline, comprising a lifting device, a rotating device and a spraying device;

[0006] The lifting device is used to adjust the distance between the spraying device and the inner wall of the pipeline;

[0007] The rotating device is arranged on the lifting device and connected to the spraying device through a telescopic device to drive the spraying device to rotate along the circumference of the pipeline to be sprayed, and the telescopic device is used to adjust the distance between the spraying device and the rotating device;

[0008] The spraying device comprises an air delivery pipe, a material delivery component and a spray gun. The spray gun is arranged on a rotating device through a telescopic device. The air delivery pipe and the material delivery component are both connected to the spray gun.

[0009] The lifting device drives the spraying device to rise according to the diameter of the pipeline, so that the spraying device and the inner wall of the pipeline are adjusted to the required distance. The spray repair device moves to the area to be sprayed; the spray device is turned on, the feeding component conveys the slurry to the spray gun, and the air pipe inputs high-pressure air into the spray gun. Under the action of high-pressure gas, the slurry is evenly sprayed through the nozzle; at the same time, the rotating device drives the spray gun to rotate, and the spray gun sprays the area to be sprayed.

[0010] The utility model is provided with a lifting device, and the distance between the nozzle and the inner wall of the pipeline can be adjusted according to the diameter of the pipeline to ensure that the spraying radius of the slurry is not limited by the diameter of the pipeline, that is, the spraying thickness of the inner wall of the pipeline at different positions is the same; and the air pipe in the spraying device can make the slurry sprayed through the nozzle under the action of high-pressure gas atomized, so that the sprayed slurry is more uniform, the waste of slurry is reduced, and the cost is reduced.

[0011] Optionally, the lifting device includes a lifting seat, a support assembly and a lifting drive, the rotating device is arranged on the lifting seat, the support assembly is hinged to the lifting seat, and the lifting drive drives the lifting seat to rise and fall through the support assembly, thereby adjusting the height of the spraying device to ensure that the spraying radius is not limited by the diameter of the pipeline.

[0012] Optionally, the support assembly includes a first support rod and a second support rod, the first support rod and the second support rod are cross-hinged through a hinge shaft, the power output end of the lifting drive is connected to the hinge shaft, and the first support rod and the second support rod are both hinged to the lifting seat.

[0013] Optionally, a mixing chamber is provided on the spray gun, and the material delivery assembly includes a plurality of material delivery pipes, and the air delivery pipe and the material delivery pipe are both connected to the mixing chamber.

[0014] The material delivery component includes a first material delivery pipe and a second material delivery pipe, which are respectively used to deliver two different slurries A and B. Slurries A and B are delivered to a mixing chamber. Slurries A and B are evenly mixed in the mixing chamber through high-pressure gas delivered by the gas delivery pipe. The evenly mixed slurry is atomized by the high-pressure gas and sprayed out from the nozzle.

[0015] Optionally, the rotating device includes a rotating drive, and the rotating drive is connected to the telescopic device via a rotating joint.

[0016] Optionally, the telescopic device includes a connecting rod, a telescopic head and a telescopic drive for driving the telescopic head to extend and retract, wherein one end of the telescopic head is connected to the connecting rod and the other end is slidably connected to the rotary joint. The telescopic drive drives the telescopic head to slide on the rotary joint, thereby realizing the extension and retraction of the telescopic head.

[0017] A protrusion is provided on the telescopic head, and a rotating part is provided in the rotating joint. The rotating part is sleeved on the outside of the telescopic head, and a groove matching the protrusion is provided at the corresponding position. The telescopic head is clamped with the rotating part through the protrusion and the groove. The rotating part is driven by the rotary drive to rotate. The telescopic head rotates under the drive of the rotating part and drives the connecting rod to rotate. One or more protrusions are provided on the telescopic head, and the number of grooves provided in the rotating part corresponds to the number of protrusions.

[0018] Optionally, the spray repair device further includes a walking device, which can move along the length direction of the pipeline to be sprayed, and the lifting device is arranged on the walking device.

[0019] Optionally, the walking device includes a walking base, with tracks provided on both sides of the walking base, and a walking drive for driving the tracks to move.

[0020] Optionally, the spray repair device also includes a camera device for respectively observing the spraying conditions in front and the spraying effects in the rear of the spray repair device.

[0021] The working process of the spray repair device of the utility model is as follows:

[0022] S1. Determine the area to be sprayed according to the location of the defect on the inner wall of the pipeline, and determine the total spraying thickness H according to the severity of the defect.

[0023] S2. Determine the distance l between the spray gun and the inner wall of the pipeline according to the diameter of the pipeline, so that the distance between the spray gun and the inner wall of the pipeline at different positions is the same;

[0024] S3, driving the walking device to move the spray repair device to the area to be sprayed;

[0025] S4. Determine the spraying rate m and the rotation speed ω of the spray gun according to the total spraying thickness H and uniformity of the spray gun;

[0026] S5, start the spraying device, the feeding assembly conveys the slurry to the spray gun, and the air pipe conveys high-pressure air into the spray gun;

[0027] S6. The rotating device drives the spray gun to rotate, and the spray gun starts to spray the area to be sprayed.

[0028] Beneficial effects:

[0029] The lifting device drives the spraying device to rise according to the diameter of the pipeline, so that the spraying device and the inner wall of the pipeline are adjusted to the required distance. The spray repair device moves to the area to be sprayed; the spray device is turned on, the feeding component conveys the slurry to the spray gun, and the air pipe inputs high-pressure air into the spray gun. Under the action of high-pressure gas, the slurry is evenly sprayed through the nozzle; at the same time, the rotating device drives the spray gun to rotate, and the spray gun sprays the area to be sprayed.

[0030] The utility model is provided with a lifting device, and the distance between the nozzle and the inner wall of the pipeline can be adjusted according to the diameter of the pipeline to ensure that the spraying radius of the slurry is not limited by the diameter of the pipeline, that is, the spraying thickness of the inner wall of the pipeline at different positions is the same; and the air pipe in the spraying device can atomize the slurry sprayed through the nozzle under the action of high-pressure gas, so that the sprayed slurry is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 It is a structural diagram of the spray repair device for the inner wall of a pipeline disclosed in the utility model;

[0033] Figure 2 It is a front view of the rotating device in the spray repair device for the inner wall of the pipeline disclosed in the utility model;

[0034] Figure 3 It is a side view of the rotating device in the spray repair device for the inner wall of the pipeline disclosed in the utility model;

[0035] Figure 4 It is a cross-sectional view of the connection between the rotary joint and the telescopic head in the spray repair device for the inner wall of the pipeline disclosed in the utility model;

[0036] Figure 5 It is a bottom view of the rotating device in the spray repair device for the inner wall of the pipeline disclosed in the utility model;

[0037] Figure 6 It is a front view of the spraying device in the spraying repair device for the inner wall of a pipeline disclosed in the utility model;

[0038] Figure 7 It is a side view of the spraying device in the spraying repair device for the inner wall of a pipeline disclosed in the utility model;

[0039] Figure 8 The utility model discloses a bottom view of a spraying device in the spraying repair device for the inner wall of a pipeline.

[0040] Reference numerals:

[0041] 11 lifting seat; 12 lifting drive; 13 first support rod; 14 second support rod; 15 first camera; 16 second camera;

[0042] 21 rotation drive; 22 rotary joint; 23 rotating part; 24 groove;

[0043] 3 telescopic device; 31 connecting rod; 32 telescopic head; 33 convex block;

[0044] 41 spray gun; 42 mixing chamber; 43 air delivery pipe; 44 first material delivery pipe; 45 second material delivery pipe; 46 spray head;

[0045] 51 walking base; 52 crawler track; 53 walking drive;

[0046] 6 control device.

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0050] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] Embodiment 1:

[0052] See also Figure 1-8 , according to the first embodiment of the utility model, the spraying repair device for the inner wall of the pipeline includes a walking device, a lifting device, a rotating device and a spraying device;

[0053] The walking device can walk along the length direction of the pipeline to be sprayed;

[0054] The lifting device is arranged on the walking device and is used to adjust the distance between the spraying device and the inner wall of the pipeline;

[0055] The rotating device is arranged on the lifting device and connected to the spraying device through the telescopic device 3 to drive the spraying device to rotate along the circumference of the pipe to be sprayed. The telescopic device 3 is used to adjust the distance between the spraying device and the rotating device;

[0056] The spraying device comprises an air pipe 43 , a material feeding assembly and a spray gun 41 . The spray gun 41 is arranged on the rotating device through a telescopic device 3 . The air pipe 43 and the material feeding assembly are both connected to the spray gun 41 .

[0057] Specifically, the lifting device drives the spraying device to rise according to the diameter of the pipeline, so that the spraying device and the inner wall of the pipeline are adjusted to the required distance. The walking device is driven to move the spray repair device to the area to be sprayed; the spraying device is turned on, the feeding component conveys the slurry to the spray gun 41, and the air pipe 43 inputs high-pressure air into the spray gun 41. Under the action of the high-pressure gas, the slurry is evenly sprayed through the nozzle 46; at the same time, the rotating device drives the spray gun 41 to rotate, and the spray gun 41 sprays the area to be sprayed.

[0058] The utility model is provided with a lifting device, and the distance between the nozzle 46 and the inner wall of the pipeline can be adjusted according to the diameter of the pipeline to ensure that the spraying radius of the slurry is not limited by the diameter of the pipeline, that is, the spraying thickness of the inner wall of the pipeline at different positions is the same; and the gas pipe 43 in the spraying device can make the slurry sprayed through the nozzle 46 atomized under the action of high-pressure gas, so that the sprayed slurry is more uniform.

[0059] In this embodiment, a passage for the material delivery assembly and the gas delivery pipe 43 to pass through is provided in the rotating device. One end of the material delivery assembly and the gas delivery pipe 43 passes through the rotating device and is connected to the spray gun 41, and the other end is connected to the slurry feeding device; one end of the gas delivery pipe 43 passes through the rotating device and is connected to the spray gun 41, and the other end is connected to the air intake device. The gas delivery pipe 43 is used to deliver high-pressure gas to the spray gun 41. Optionally, the passage for the material delivery assembly and the gas delivery pipe 43 to pass through may not be provided in the rotating device, and the material delivery assembly may be directly connected to the slurry feeding device, and the gas delivery pipe 43 may be directly connected to the air intake device.

[0060] See also Figure 1 In some embodiments of the utility model, the lifting device includes a lifting seat 11, a supporting assembly and a lifting drive 12, the rotating device is arranged on the lifting seat 11, the supporting assembly is hinged to the lifting seat 11, and the lifting drive 12 drives the lifting seat 11 to rise and fall through the supporting assembly.

[0061] A support assembly is provided below the lifting seat 11, and the lifting drive 12 drives the lifting seat 11 to rise and fall through the support assembly, thereby adjusting the height of the spraying device to ensure that the spraying radius is not limited by the diameter of the pipeline. Optionally, the lifting drive 12 is a cylinder, and the lifting seat 11 is raised and lowered by extending and retracting the power output end of the cylinder, thereby changing the distance between the spraying device and the inner wall of the pipeline.

[0062] See also Figure 1 In some embodiments of the utility model, the support assembly includes a first support rod 13 and a second support rod 14, the first support rod 13 and the second support rod 14 are cross-hinged through a hinge shaft, the power output end of the lifting drive 12 is connected to the hinge shaft, and the first support rod 13 and the second support rod 14 are both hinged to the lifting seat 11. The power output end of the lifting drive 12 drives the lifting seat 11 to rise and fall by changing the position of the hinge shaft.

[0063] See also Figure 6 and 7 In some embodiments of the present invention, a mixing chamber 42 is provided on the spray gun 41 , and the material delivery assembly includes a plurality of material delivery pipes, and the air delivery pipe 43 and the material delivery pipe are both connected to the mixing chamber 42 .

[0064] In this embodiment, the feed assembly includes a first feed pipe 44 and a second feed pipe 45, which are respectively used to transport two different slurries A and B. Slurries A and B are transported to a mixing chamber 42. Slurries A and B are evenly mixed in the mixing chamber 42 through high-pressure gas transported by a gas pipe 43. The evenly mixed slurry is atomized by the high-pressure gas and sprayed out from a nozzle 46.

[0065] See also Figure 1-5 In some embodiments of the present invention, the rotating device includes a rotating drive 21, and the rotating drive 21 is connected to the telescopic device 3 through a rotating joint 22, thereby driving the telescopic device 3 to rotate, so that the spraying device can achieve centrifugal spraying.

[0066] See also Figure 1-8 In some embodiments of the present invention, the telescopic device 3 includes a connecting rod 31, a telescopic head 32 and a telescopic drive for driving the telescopic head 32 to extend and retract. One end of the telescopic head 32 is connected to the connecting rod 31, and the other end is slidably connected to the rotary joint 22. The telescopic drive drives the telescopic head 32 to slide on the rotary joint 22, thereby realizing the extension and retraction of the telescopic head 32. Optionally, the telescopic length of the telescopic head 32 can also be adjusted manually.

[0067] A protrusion 33 is provided on the telescopic head 32, and a rotating part 23 is provided in the rotary joint 22. The rotating part 23 is sleeved on the outside of the telescopic head 32, and a groove 24 matching the protrusion 33 is provided at the corresponding position. The telescopic head 32 is clamped with the rotating part 23 through the protrusion 33 and the groove 24. The rotary drive 21 drives the rotating part 23 to rotate. Driven by the rotating part 23, the telescopic head 32 rotates and drives the connecting rod 31 to rotate. One or more protrusions 33 are provided on the telescopic head 32, and the number of grooves 24 provided in the rotating part 23 corresponds to the number of protrusions 33.

[0068] See also Figure 1 In some embodiments of the present invention, the walking device includes a walking base 51, and tracks 52 are respectively provided on both sides of the walking base 51, and a walking drive 53 for driving the tracks 52 to move.

[0069] See also Figure 1 In some embodiments of the present invention, the spray repair device also includes a camera device.

[0070] The camera device includes a first camera 15 and a second camera 16, which respectively observe the front spraying situation and the rear spraying effect of the spray repair device. The first camera 15 and the second camera 16 are both connected to the lifting seat 11 through a connecting frame.

[0071] See also Figure 1 In some embodiments of the present utility model, the spray repair device further includes a control device 6, and the lifting drive 12, the first camera 15, the second camera 16, the rotation drive 21, the telescopic drive, the slurry feeding device, the air intake device, and the walking drive 53 are all electrically connected to the control device 6. The control device 6 is used to control the switch and lifting height of the lifting drive 12, the switch and rotation speed of the rotation drive 21, the switch and telescopic length of the telescopic drive, the switch and feeding speed of the slurry feeding device, the switch, air intake rate and conveying gas pressure of the air intake device, and the switch and walking distance of the walking drive 53. The observation images of the first camera 15 and the second camera 16 are transmitted to the control device 6.

[0072] See also Figure 1-8 The working process of the pipe inner wall spray repair device according to the embodiment of the utility model is as follows:

[0073] S1. Determine the area to be sprayed according to the location of the defect on the inner wall of the pipeline, and determine the total spraying thickness H according to the severity of the defect; connect the spraying device with the control equipment and the slurry raw material barrel.

[0074] According to the severity of the disease, different spraying thicknesses H are set; if the degree of the disease is slight, that is, there is only slight cracking and the crack width is less than 0.01mm, the spraying thickness H≤1mm; if the degree of the disease is moderate, that is, the crack width exceeds 0.01mm and there is slight leakage, the spraying thickness H ranges from 1mm≤H≤1.5mm; if the degree of the disease is severe, that is, there is damage, cracks, and water seepage, the spraying thickness H>1.5mm.

[0075] S2, determining the distance l between the spray gun and the inner wall of the pipeline according to the diameter of the pipeline, so that the distance between the nozzle 46 of the spray gun 41 and the inner wall of the pipeline at different positions is the same;

[0076] The support height of the lifting drive 12 is set according to the pipe diameter, so that the distance between the nozzle 46 and the inner wall of the pipe at different positions is the same. At this time, the distance between the nozzle 46 and the inner wall of the pipe is a predetermined distance l, and the distance l is related to the spraying pressure P. The dimension elimination formula is:

[0077]

[0078] Where l is in cm, spray pressure P is in MPa, l0=1cm, P0=1MPa. The range of distance l is 15cm≤l≤30cm, which is determined according to the pipe diameter and on-site working conditions.

[0079] S3, driving the walking device to move the spray repair device to the area to be sprayed;

[0080] The starting and ending ends of the spraying area need to extend 10cm-15cm outside the diseased area.

[0081] S4. Determine the spraying rate m and the rotation speed ω of the spray gun according to the total spraying thickness H and uniformity of the spray gun;

[0082] By observing the spraying thickness and uniformity in real time, the spraying rate m and the rotation speed ω of the spray gun 41 are adjusted. The spraying rate m is related to the spraying pressure. The greater the spraying pressure, the greater the spraying rate. The range of the spraying rate m of the spray gun 41 is 0.5kg / min≤m≤3.6kg / min.

[0083] The spray coverage width b is positively correlated with the distance between the spray head 46 and the inner wall of the pipe;

[0084] According to the spraying coverage width b, the cross-sectional area S = 2πrb;

[0085] The density of the spray slurry is ρ, and according to the total spray thickness in step S1 being H, the total amount of material used is M=SHρ;

[0086] The spraying time for each section is n=M / m, and the spraying thickness h is related to the pressure. Therefore, the number of spray layers required for each section is c=H / h, that is, the number of spraying circles is c; the rotation speed ω=c / n.

[0087] S5, start the spraying device, the feeding assembly conveys the slurry to the spray gun 41, and the air pipe 43 conveys high-pressure air into the spray gun 41;

[0088] S6. The rotating device drives the spray gun 41 to rotate, and the spray gun 41 starts to spray the area to be sprayed.

[0089] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The spray repair device for the inner wall of the pipeline is characterized by: It includes a lifting device, a rotating device and a spraying device; The lifting device is used to adjust the distance between the spraying device and the inner wall of the pipeline; The rotating device is arranged on the lifting device and connected to the spraying device through a telescopic device to drive the spraying device to rotate along the circumference of the pipeline to be sprayed, and the telescopic device is used to adjust the distance between the spraying device and the rotating device; The spraying device comprises an air delivery pipe, a material delivery component and a spray gun. The spray gun is arranged on a rotating device through a telescopic device. The air delivery pipe and the material delivery component are both connected to the spray gun.

2. The spray repair device according to claim 1, characterized in that: The lifting device comprises a lifting seat, a supporting assembly and a lifting drive, the rotating device is arranged on the lifting seat, the supporting assembly is hinged to the lifting seat, and the lifting drive drives the lifting seat to move up and down through the supporting assembly.

3. The spray repair device according to claim 2, characterized in that: The support assembly includes a first support rod and a second support rod, the first support rod and the second support rod are cross-hinged through a hinge shaft, the power output end of the lifting drive is connected to the hinge shaft, and the first support rod and the second support rod are both hinged to the lifting seat.

4. The spray repair device according to claim 1, characterized in that: The spray gun is provided with a mixing chamber, the material delivery assembly comprises a plurality of material delivery pipes, and the air delivery pipe and the material delivery pipe are both connected to the mixing chamber.

5. The spray repair device according to claim 1, characterized in that: The rotating device comprises a rotating drive, which is connected to the telescopic device via a rotating joint.

6. The spray repair device according to claim 5, characterized in that: The telescopic device comprises a connecting rod, a telescopic head and a telescopic drive for driving the telescopic head to extend and retract. One end of the telescopic head is connected to the connecting rod, and the other end is slidably connected to the rotating joint.

7. The spray repair device according to claim 1, characterized in that: The spray repair device also includes a walking device, which can move along the length direction of the pipeline to be sprayed, and the lifting device is arranged on the walking device.

8. The spray repair device according to claim 7, characterized in that: The walking device comprises a walking base, crawlers are respectively arranged on both sides of the walking base, and a walking drive for driving the crawlers to move.

9. The spray repair device according to claim 1, characterized in that: The spray repair device also includes a camera.

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