In-pipe grouting device

Abstract

The utility model provides an in-pipe grouting device which comprises an inner cylinder, an air bag capable of being expanded and contracted is arranged on the outer side of the inner cylinder, fixing supports are symmetrically arranged at the two ends of the air bag, and a plurality of telescopic idler wheel assemblies are arranged on the fixing supports. Compared with a traditional double-air-bag system, the novel scheme has the advantages that gaps among the air bags are eliminated, uniform distribution and full filling of grout are guaranteed, the sealing performance is enhanced, and the problem that grouting repair of the pipe wall is not facilitated in the running water environment is solved.

Description

Technical Field

[0001] The utility model relates to the field of pipeline maintenance, in particular to an in-pipe grouting device. Background Art

[0002] Many urban rainwater and sewage pipelines are in disrepair due to age. One of the more serious problems is leakage. Before leakage repair, it is generally necessary to stop water by grouting. However, for third- and fourth-level leakage holes, due to the large leakage volume and fast underground water flow rate, it is difficult to stop water by injecting cement slurry on the outside. If chemical grouting outside the pipe is used, on the one hand, the cost is relatively high, and on the other hand, the positioning drilling is difficult.

[0003] In-pipe grouting can effectively solve the leakage problem. However, the current difficulties in in-pipe grouting are as follows: There is often accumulated water in the rainwater pipeline all year round. Especially in the rainy season when there is sufficient rain, the flow rate of the drainage pipeline is relatively large, and some sewage pipelines operate at a high water level and have a large flow rate. After grouting, the setting time of the slurry is long (the in-pipe grouting equipment is removed after the slurry sets), and the drainage problem must be solved in advance, which is time-consuming and laborious; In addition, the cost of some equipment is high, which is not conducive to large-scale popularization and use.

[0004] The method adopted in Chinese Patent CN112196057B for the in-pipe grouting device and grouting method is that an auxiliary airbag is provided on the outer wall of the cylinder body, and positioning airbags are provided at both ends of the auxiliary airbag; grouting holes are provided on the outer surface of the auxiliary airbag, one end of the grouting hose is connected to the grouting hole, the other end of the grouting hose is connected to the grouting inlet hole, the grouting hose is arranged inside the auxiliary airbag, and the grouting inlet hole is arranged on the cylinder wall of the cylinder body; a plurality of air supply holes are provided on the cylinder wall of the cylinder body, the air supply holes are used to connect the gas input pipe, and the gas input pipe is used to supply gas to the auxiliary airbag and the positioning airbag.

[0005] In this solution, an auxiliary airbag and two side positioning airbags are required to complete the operation together. And after the positioning airbag and the auxiliary airbag are inflated, there is still a large gap between the two airbags, which is not conducive to the extrusion assistance of grouting. In this solution, only one airbag is required to complete the operations in the above patent, and there is no problem of gaps, which is a more preferable solution and has better construction effects. Content of the Utility Model

[0006] The main purpose of the utility model is to provide an in-pipe grouting device, which solves the problem that it is not conducive to grouting and repairing the pipe wall in a flowing water environment, and there is no problem of gaps between the positioning airbag and the auxiliary airbag in this solution compared with other patents.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is: an in-pipe grouting device, including an inner cylinder, an inflatable and retractable airbag is arranged on the outer side of the inner cylinder, fixed brackets are symmetrically arranged at both ends of the airbag, and a plurality of telescopic roller assemblies are arranged on the fixed brackets.

[0008] In a preferred embodiment, the airbag is an integral body, with a recess in the middle. Protrusions are symmetrically arranged on both sides of the recess, and the inside of the recess communicates with the inside of the protrusions.

[0009] In a preferred embodiment, a plurality of grouting holes are evenly distributed on the outer circle of the recess. A grouting pipe is arranged inside the grouting holes, and the grouting pipe penetrates into the inside of the inner cylinder;

[0010] A flexible pipe is also arranged between the grouting pipe and the grouting holes.

[0011] In a preferred embodiment, a front end cover is arranged at one end of the inner cylinder, and a rear end cover is arranged at the other end. A tension rod is arranged between the front end cover and the rear end cover;

[0012] The tension rod penetrates through the front end cover and the rear end cover. A pull ring is arranged at the top of the end of the tension rod close to the front end cover;

[0013] In a preferred embodiment, an air inlet pipe is also arranged on one side of the front end cover. The air inlet pipe penetrates through the front end cover and the inner cylinder and communicates with the airbag.

[0014] In a preferred embodiment, threaded sections are arranged at both ends of the tension rod, and nuts are arranged on the threaded sections. The nuts are used to clamp the front end cover and the rear end cover;

[0015] A positioning device is also arranged inside the tension rod. The positioning device is used to detect the position of the device in the pipeline during construction. The positioning device is a radio frequency identification tag.

[0016] In a preferred embodiment, the fixed support includes a housing. A plurality of guide cylinders are arranged on the outer circle of the housing. A roller assembly is arranged inside the guide cylinders. A clamping plate is arranged on one side of the housing close to the airbag, and the clamping plate is in contact with the airbag.

[0017] In a preferred embodiment, the roller assembly includes a roller frame. A wheel frame rod is arranged on one side of the roller frame. The wheel frame rod is coaxially arranged with the guide cylinder. A roller is arranged on the other side of the roller frame. The roller is used to roll on the inner wall of the pipeline;

[0018] A sliding seat is arranged at the top of the end of the wheel frame rod far from the roller frame. A spring is arranged between the sliding seat and the wheel frame rod. The sliding seat is slidably connected to the wheel frame rod.

[0019] In a preferred embodiment, a retractable brake rod is arranged inside the wheel frame rod. A brake pad is arranged on a section of the brake rod close to the roller. A pulley is arranged at the tail of the other end of the brake rod. A spring is arranged between the brake rod and the wheel frame rod;

[0020] In a preferred embodiment, a jacking plate is arranged below the sliding seat and the pulley. The jacking plate includes a jacking part and a braking part. The jacking plate is used to abut against the sliding seat, and the braking part is used to abut against the pulley;

[0021] One side of the lifting plate is provided with a guide rail. The lifting plate is slidably connected to the interior of the housing. The bottom surface of the lifting plate is provided with a rack. Below the rack is provided a driving wheel which meshes with the rack. One side of the driving wheel is provided with a worm gear. Below the worm gear is provided a worm which meshes with the worm gear. The worm is connected to a driving motor.

[0022] The utility model provides a pipe grouting device, which has the following beneficial effects: 1. Through the design of a single integrated airbag, the efficiency and effect of leakage repair are significantly improved. Compared with the traditional double-airbag system, the new solution eliminates the gap between the airbags, ensures uniform distribution and full filling of the slurry, and enhances the sealing performance.

[0023] 2. The single-airbag structure simplifies the operation steps, reduces the equipment cost and construction time. It has obvious advantages especially under complex working conditions of high water level and large flow rate. No additional drainage measures are required, reducing the construction difficulty. The compact design is conducive to improving the grouting speed, shortening the waiting time for the slurry to solidify, and thus accelerating the repair process, providing a more economical and efficient technical means for the leakage treatment of urban rainwater and sewage pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present invention in conjunction with the drawings and embodiments:

[0025] Figure 1 is the axonometric view of the grouting device of the utility model;

[0026] Figure 2 is the front view of the grouting device of the utility model;

[0027] Figure 3 is the exploded view of the grouting device of the utility model;

[0028] Figure 4 is the cross-sectional view of the grouting device of the utility model;

[0029] Figure 5 is the structural schematic diagram of the roller assembly of the utility model;

[0030] Figure 6 is the usage schematic diagram of the grouting device of the utility model;

[0031] Figure 7 is the control schematic diagram of the grouting system of the utility model.

[0032] In the figure: inner cylinder 1; front end cover 101; rear end cover 102; tension rod 103; pull ring 104; gas filling pipe 105; nut 106; positioning device 107; airbag 2; recessed part 201; protruding part 202; grouting hole 203; grouting pipe 204; flexible pipe 205; fixed bracket 3; outer shell 301; guide cylinder 302; clamping plate 303; roller assembly 4; roller frame 401; roller 402; wheel frame rod 403; brake pad 404; brake rod 405; sliding seat 406; jacking plate 407; jacking part 408; braking part 409; guide rail 410; worm gear 411; driving wheel 412; worm 413; pulley 414; pipeline 5; reader-writer 6; manual valve 7. Detailed implementation method

[0033] Embodiment 1

[0034] As Figures 1-6 shown, a grouting device inside a pipe includes an inner cylinder 1. An expandable and contractible airbag 2 is arranged on the outer side of the inner cylinder 1. Fixed brackets 3 are symmetrically arranged at both ends of the airbag 2, and a plurality of telescopic roller assemblies 4 are arranged on the fixed brackets 3.

[0035] In a preferred solution, the airbag 2 is an integral body. A recessed part 201 is arranged in the middle of the airbag 2. Protruding parts 202 are symmetrically arranged on both sides of the recessed part 201, and the inside of the recessed part 201 communicates with the inside of the protruding parts 202.

[0036] In a preferred solution, a plurality of grouting holes 203 are evenly distributed on the outer circle of the recessed part 201. A grouting pipe 204 is arranged inside the grouting holes 203, and the grouting pipe 204 penetrates through to the inside of the inner cylinder 1;

[0037] A flexible pipe 205 is further arranged between the grouting pipe 204 and the grouting holes 203.

[0038] In a preferred solution, a front end cover 101 is arranged at one end of the inner cylinder 1, and a rear end cover 102 is arranged at the other end. A tension rod 103 is arranged between the front end cover 101 and the rear end cover 102;

[0039] The tension rod 103 penetrates through the front end cover 101 and the rear end cover 102. A pull ring 104 is arranged at the top of the end of the tension rod 103 close to the front end cover 101;

[0040] In a preferred solution, a gas filling pipe 105 is further arranged on one side of the front end cover 101. The gas filling pipe 105 penetrates through the front end cover 101 and the inner cylinder 1 and communicates with the airbag 2.

[0041] In a preferred solution, threaded sections are arranged at both ends of the tension rod 103, and nuts 106 are arranged on the threaded sections. The nuts 106 are used to clamp the front end cover 101 and the rear end cover 102;

[0042] The interior of the tension rod 103 is also provided with a positioning device 107, which is used to detect the position of the device in the pipeline during construction. The positioning device 107 is a radio frequency identification tag.

[0043] In a preferred embodiment, the fixed bracket 3 includes a housing 301. A plurality of guide cylinders 302 are provided on the outer circumference of the housing 301. A roller assembly 4 is provided inside the guide cylinder 302. A clamping plate 303 is provided on one side of the housing 301 close to the airbag 2, and the clamping plate 303 is in contact with the airbag 2.

[0044] In a preferred embodiment, the roller assembly 4 includes a roller frame 401. A wheel frame rod 403 is provided on one side of the roller frame 401. The wheel frame rod 403 is arranged coaxially with the guide cylinder 302. A roller 402 is provided on the other side of the roller frame 401, and the roller 402 is used to roll on the inner wall of the pipeline 5;

[0045] At the top end of the wheel frame rod 403 away from the roller frame 401, a sliding seat 406 is provided. A spring is provided between the sliding seat 406 and the wheel frame rod 403, and the sliding seat 406 is slidably connected to the wheel frame rod 403.

[0046] In a preferred embodiment, a telescopic brake rod 405 is provided inside the wheel frame rod 403. A brake pad 404 is provided on a section of the brake rod 405 close to the roller 402. A pulley 414 is provided at the tail end of the other end of the brake rod 405. A spring is provided between the brake rod 405 and the wheel frame rod 403;

[0047] In a preferred embodiment, a jacking plate 407 is provided below the sliding seat 406 and the pulley 414. The jacking plate 407 includes a jacking part 408 and a braking part 409. The jacking plate 407 is used to abut against the sliding seat 406, and the braking part 409 is used to abut against the pulley 414;

[0048] A guide rail 410 is provided on one side of the jacking plate 407. The jacking plate 407 is slidably connected to the inside of the housing 301. A rack is provided on the bottom surface of the jacking plate 407. A driving wheel 412 is provided below the rack. The driving wheel 412 meshes with the rack. A worm gear 411 is provided on one side of the driving wheel 412. A worm 413 is provided below the worm gear 411. The worm 413 meshes with the worm gear 411, and the worm 413 is connected to a driving motor.

[0049] Embodiment 2

[0050] Further described in combination with Embodiment 1, as Figure 7 shown in the structure, a grouting control system in a pipeline includes a grouting pump and a water pump. The grouting pump and the water pump are connected to at least one grouting pipe 204 through pipelines, and at least one grouting pipe 204 is connected to the waste water tank of the external system through a pipeline;

[0051] An air compressor and a negative pressure pump are connected to the gas injection pipe 105 through pipelines;

[0052] The PLC controller is electrically connected to all solenoid valves, pressure detectors and timers on the pipeline.

[0053] In the preferred solution, a 6# solenoid valve, a 5# solenoid valve, a manual valve 7, an 8# pressure detector and a 7# timer are successively arranged between the grouting pump and the grouting pipe 204. The 7# timer is used to close regularly during grouting or water injection, so that maintenance personnel can temporarily leave the site during grouting or water injection;

[0054] A 4# solenoid valve is arranged on the pipeline of the water pump. The pipeline after the 4# solenoid valve is connected between the 6# solenoid valve and the 5# solenoid valve and is communicated with the pipeline of the grouting pump;

[0055] A 3# solenoid valve and a manual valve 7 are successively arranged between the pipeline of the waste sewage tank and the grouting pipe 204;

[0056] A 2# solenoid valve, a manual valve 7 and a 9# solenoid valve are successively arranged between the air compressor and the gas filling pipe 105;

[0057] The negative pressure pump is connected with a 1# solenoid valve. The pipeline after the 1# solenoid valve is connected between the 2# solenoid valve and the manual valve 7.

[0058] A usage method and a control system of a pipe internal grouting device are as follows: Place this device in the pipeline to be repaired. Connect a pipeline robot in front of the advancing end of this device, connect the gas filling pipe 105 and the grouting pipe 204, then connect the towing rope to the pull ring 104, and at the same time start the driving motor to rotate the worm 413. The worm 413 drives the worm wheel 411 to rotate, and the driving wheel 412 drives the jacking plate to move horizontally. The jacking part 408 preferentially contacts the sliding seat 406, pushes the sliding seat 406 upward, so that the outer rollers 402 contact the inner wall of the pipeline 5. When the wheel frame rods 403 in at least four directions rise to the same height, the driving motor stops and remains stationary;

[0059] The pipeline robot moves this device to the position to be repaired. The maintenance personnel first confirm the position through the pipeline robot, and then use a handheld radio frequency identification (RFID) tag reader / writer to sense the position closest to the RFID tag arranged inside this device outside the pipeline for construction confirmation. This solution uses low-frequency (LF) RFID, frequency range: 30 kHz to 300 kHz, typical operating frequency: 125 kHz or 134.2 kHz, sensing range: usually less than 10 cm (about 4 inches), sometimes up to about 30 cm (about 12 inches). The sensing range is short, but the penetration is good, and it is suitable for metal and liquid environments;

[0060] After confirmation, the drive motor continues to rotate the worm 413. At this time, the brake part 409 will lift the brake lever 405, causing the brake pads 404 to tightly adhere to the rollers 402, making the entire device no longer slidable. Then, the airbag 2 is inflated. The convex part 202 bulges first and presses against the inner wall of the pipeline 5. At this time, the concave part 201 is an annular area, that is, the area that needs to be repaired by grouting. The grouting method is the same as that of the pipe grouting device and grouting method in Chinese Patent CN112196057B;

[0061] The logic of the grouting control system of this device is as follows:

[0062] I. Air circuit logic of the grouting device: 1. Airbag negative pressure: The 1# solenoid valve is opened, and a signal is given to start the negative pressure pump. The negative pressure pump starts to work and runs for about 5 minutes. The required time is determined according to the actual pipeline length. Refer to the pressure gauge of the negative pressure pump. When the negative pressure is about -100 Pa, a signal is given to turn off the negative pressure pump, and the negative pressure pump stops pumping. At the same time, the 1# line solenoid valve is closed;

[0063] 2. Airbag pressurization: Open the 2# solenoid valve, and compressed air starts to inflate. When the pressure reaches the value set by the 9# pressure detector, such as 0.15 MPa, the 2# solenoid valve is closed;

[0064] 3. Airbag pressure increase: Open the 2# solenoid valve, and compressed air inflates. When the pressure reaches the highest pressure value set by the 9# pressure detector, such as the set highest pressure of 0.2 MPa, the 2# solenoid valve automatically closes and cannot continue to increase the pressure;

[0065] 4. Airbag pressure reduction: Open the 1# solenoid valve, and compressed air leaks out. When the pressure reaches the value set by the 9# pressure detector, such as 0.1 MPa, close the 1# solenoid valve to maintain this pressure;

[0066] 5. Airbag pressure relief: Open the 1# solenoid valve, and compressed air leaks out, and the airbag is at normal pressure;

[0067] II. Liquid circuit logic of the grouting device: 1. Grouting replacement: The 6# solenoid valve and the 5# solenoid valve are opened, all the manual valves 7 on the front side of the working airbag are in the open state, the 4# solenoid valve is in the closed state, and a signal is given to start the grouting pump. The grouting pump works; at the same time, the 3# solenoid valve is opened to replace and discharge the wastewater in the sewage pipeline until the normal cement slurry is discharged. Then, the 3# solenoid valve is closed, and a signal is given to turn off the grouting pump. The duration can be freely set, such as 5 minutes, etc.;

[0068] 2. Grouting pressure increase and maintenance: The 6# solenoid valve and the 5# solenoid valve are opened, and the 3# solenoid valve is in the closed state; a signal is given to start the grouting pump. When the pressure detected by the 8# pressure sensor rises to the set value, such as 0.2 MPA, a signal is given to turn off the grouting pump, and the 6# solenoid valve and the 5# solenoid valve are closed; After 10 minutes, the time is adjustable, open the 3# solenoid valve for about 2 minutes, the time is adjustable, and cycle back to the start;

[0069] 3. Rubber bladder water replacement: Open the 4# solenoid valve and the 5# solenoid valve. All the manual valves 7 on the front side of the working bladder are in the open state. Close the 6# solenoid valve. Give the start signal to the water pump, and the water pump works. At the same time, open the 3# solenoid valve to replace and discharge the cement slurry in the sewage pipeline until the discharged water is clear and normal. Then give the stop signal to the water pump. The duration can be freely set, such as 10 minutes, etc.

[0070] 4. Water replacement of the pipeline at the grouting pump: Open the 4# solenoid valve and the 6# solenoid valve. Close the 5# solenoid valve. Give the start signal to the water pump, and the water pump works. Replace and discharge the cement slurry in the pipeline until the discharged water is normal. Then give the stop signal to the water pump. The duration can be freely set, such as 2 minutes, etc.

[0071] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A pipe grouting device, characterized in that: The invention comprises an inner cylinder (1), an expandable and contractible air bag (2) is arranged on the outer side of the inner cylinder (1), fixed brackets (3) are symmetrically arranged at both ends of the air bag (2), and a plurality of retractable roller assemblies (4) are arranged on the fixed brackets (3).

2. According to claim 1, a pipe grouting device is characterized in that: The airbag (2) is a whole, a recessed portion (201) is provided in the middle of the airbag (2), raised portions (202) are symmetrically provided on both sides of the recessed portion (201), and the interiors of the recessed portion (201) and the raised portions (202) are communicated with each other.

3. According to claim 2, a pipe grouting device is characterized in that: A plurality of grouting holes (203) are evenly distributed on the outer circle of the recessed portion (201), and a grouting pipe (204) is provided inside the grouting hole (203), and the grouting pipe (204) penetrates into the interior of the inner tube (1); A flexible tube (205) is also provided between the grouting pipe (204) and the grouting hole (203).

4. The in-pipe grouting device according to claim 1, characterized in that: A front end cover (101) is provided at one end of the inner cylinder (1), and a rear end cover (102) is provided at the other end; a tension rod (103) is provided between the front end cover (101) and the rear end cover (102); The tension rod (103) passes through the front end cover (101) and the rear end cover (102), and a pull ring (104) is provided at the top of one end of the tension rod (103) close to the front end cover (101).

5. The in-pipe grouting device according to claim 4, characterized in that: A gas filling pipe (105) is also provided on one side of the front end cover (101), and the gas filling pipe (105) passes through the front end cover (101) and the inner tube (1) and is in communication with the air bag (2).

6. The in-pipe grouting device according to claim 4, characterized in that: Both ends of the tension rod (103) are provided with threaded sections, and nuts (106) are provided on the threaded sections. The nuts (106) are used to clamp the front end cover (101) and the rear end cover (102). A positioning device (107) is also provided inside the tension rod (103). The positioning device (107) is used to detect the position of the device in the pipeline during construction. The positioning device (107) is a wireless radio frequency identification tag.

7. The in-pipe grouting device according to claim 1, characterized in that: The fixed bracket (3) comprises a shell (301), the outer circumference of the shell (301) is provided with a plurality of guide cylinders (302), a roller assembly (4) is provided inside the guide cylinders (302), and a clamping plate (303) is provided on a side of the shell (301) close to the airbag (2), the clamping plate (303) being in contact with the airbag (2).

8. The in-pipe grouting device according to claim 7, characterized in that: The roller assembly (4) comprises a roller frame (401), a roller frame rod (403) is provided on one side of the roller frame (401), the roller frame rod (403) and the guide cylinder (302) are arranged coaxially, and a roller (402) is provided on the other side of the roller frame (401), and the roller (402) is used to roll on the inner wall of the pipe (5); A sliding seat (406) is provided at the top of one end of the wheel frame rod (403) away from the roller frame (401), a spring is provided between the sliding seat (406) and the wheel frame rod (403), and the sliding seat (406) is slidably connected to the wheel frame rod (403).

9. The in-pipe grouting device according to claim 8, characterized in that: A retractable brake rod (405) is arranged inside the wheel frame rod (403), a section of the brake rod (405) close to the roller (402) is provided with a brake pad (404), a pulley (414) is arranged at the tail of the other end of the brake rod (405), and a spring is arranged between the brake rod (405) and the wheel frame rod (403).

10. The in-pipe grouting device according to claim 9, characterized in that: A lifting plate (407) is provided below the sliding seat (406) and the pulley (414), and the lifting plate (407) includes a lifting portion (408) and a brake portion (409). The lifting plate (407) is used to abut against the sliding seat (406), and the brake portion (409) is used to abut against the pulley (414); A guide rail (410) is provided on one side of the lifting plate (407), the lifting plate (407) is slidably connected to the inside of the housing (301), a rack is provided on the bottom surface of the lifting plate (407), a driving wheel (412) is provided below the rack, the driving wheel (412) is meshed with the rack, a worm wheel (411) is provided on one side of the driving wheel (412), a worm (413) is provided below the worm wheel (411), the worm (413) is meshed with the worm wheel (411), and the worm (413) is connected to a driving motor.

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