Equipment vehicle for repairing pipeline through in-situ thermoplastic forming

Abstract

The utility model provides an equipment car for in-situ thermoplastic forming repair pipeline, which comprises a carriage, a water tank and a boiler are arranged in the carriage of the equipment car, the boiler is provided with a first water outlet pipe and a first water return pipe which are connected with the water tank to realize water circulation, a detachable heat insulation plate is arranged outside the water tank, and a heat insulation water tank cover is arranged outside the water tank. The size of the pool is matched with that of the thermoplastic material lining pipe, and the thermoplastic material lining pipe can be placed in the pool and submerged by hot water; the water tank is provided with a second water outlet pipe and a second water return pipe, and the second water outlet pipe and the second water return pipe can be respectively connected with the water passing ports on the plugs arranged at the two ends of the thermoplastic material lining pipe and are respectively connected with the water pump. According to the device, the thermoplastic material lining pipe can be heated and pressurized by using hot water on an engineering site, so that the temperature uniformity during repairing is improved, and the risk of cracks is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipeline repair, in particular to an equipment vehicle used for in-situ thermoplastic molding pipeline repair. Background Art

[0002] In order to eliminate the functional and structural defects of municipal water supply and drainage pipelines, their defects should be repaired. According to the excavation conditions of the adopted process, the repair technology can be divided into excavation repair and trenchless repair. Trenchless repair technology refers to the technology of repairing and updating water supply and drainage pipelines by using less or no excavation of the surface. According to the construction process, trenchless repair technology includes spraying method, interlacing pipe method, on-site pipe making method, and in-situ curing method.

[0003] In-situ thermoplastic molding repair technology is a type of in-situ curing method. This technology first uses steam to heat and soften the liner in the steam box of the equipment vehicle, then uses the pulling method to place the softened liner into the original pipeline, and after adding pipe plugs at both ends of the liner, steam is passed in to pressurize the inner liner so that it softens and fits closely to the original pipeline, and then the hose is solidified by maintaining pressure and cooling, thereby achieving the purpose of defective pipeline repair.

[0004] The existing in-situ thermoplastic forming repair is to preheat and soften the liner pipe with steam on the equipment vehicle, and then use the pull-in method to quickly place the softened liner pipe into the original pipeline. After installing pipe plugs at both ends of the liner pipe, steam is introduced to pressurize the liner pipe so that it softens and fits tightly to the original pipeline. Then, the hose is solidified by maintaining pressure and cooling, thereby achieving the purpose of repairing the defective pipeline.

[0005] Steam is used on the equipment vehicle to preheat and soften the liner pipe. After it is pulled into the pipeline to be repaired, steam is used to pressurize the liner pipe to soften it and make it fit tightly against the original pipeline. The main disadvantages are as follows: the steam temperature is not easy to control. When steam is used to soften the liner pipe, the specific heat capacity of water vapor is small. After heat conduction with the material or the external environment, the temperature changes rapidly, which can easily cause cracks in the liner pipe due to uneven heating. The liner pipe on the reel has a non-customized length and is heated and cooled multiple times, which increases the risk of cracks in the liner pipe. The steam temperature of each part in the liner pipe preheating steamer and pipeline repair process is quite different, and temperature monitoring is difficult, making it impossible to accurately judge whether each part is heated evenly. Utility Model Content

[0006] The purpose of the utility model is to provide an equipment vehicle for in-situ thermoplastic forming pipe repair, which can heat the thermoplastic material lining pipe with hot water and pressurize it to improve the temperature uniformity during repair and reduce the risk of cracks. To this end, the utility model adopts the following technical solutions:

[0007] A device vehicle for in-situ thermoplastic forming repair of pipelines comprises a vehicle compartment, characterized in that a water tank and a boiler are arranged in the vehicle compartment of the device vehicle, the boiler is provided with a first water outlet pipe and a first water return pipe connected to the water tank to realize water circulation, a detachable insulation board is arranged outside the water tank and is equipped with an insulation water tank cover, the size of the water tank is matched to place a thermoplastic material lined pipe and submerge it with hot water; the water tank is provided with a second water outlet pipe and a second water return pipe, the second water outlet pipe and the second water return pipe can be respectively connected to the water-through interfaces on the plugs at both ends of the thermoplastic material lined pipe, and the second water outlet pipe and the second water return pipe are respectively connected to water pumps.

[0008] Furthermore, the first water outlet pipe of the boiler is provided with a connecting pipe in the water pool, and the connecting pipe can be connected with the heated liner pipe in the water pool, so that the hot water first enters the connected thermoplastic liner pipe through the connecting pipe, and after circulating in the liner pipe, the hot water enters the water pool through another port of the thermoplastic liner pipe and mixes into the hot water that submerges the liner pipe wound on the reel.

[0009] By adopting the technical solution of the utility model, the coiled thermoplastic material liner pipe can be heated at the pipeline repair site, and the liner pipe can be pressurized with hot water and circulated to replace the hot water, so as to cool and solidify the expanded liner pipe, improve the temperature uniformity during repair, and reduce the risk of cracks. In addition, by setting up a hot water circulation loop, the hot water can be recycled and used when heating and softening the liner pipe in the water tank and heating, softening, pressurizing and expanding the liner pipe in the repaired pipeline, which reduces energy consumption and production costs and is beneficial to environmental protection; in addition, the hot water temperature is controllable and can be adjusted in real time according to needs. The hot water temperature can be gradually increased to avoid rapid temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 and Figure 2 They are respectively a cross-sectional view and a longitudinal cross-sectional view of a water pool on an equipment vehicle of the utility model.

[0011] Figure 3 Schematic diagram of preheating and softening the liner pipe on the equipment vehicle.

[0012] Figure 4 Schematic diagram of the liner pipe being pulled into the pipeline to be repaired and pressurized with hot water. Implementation

[0013] With reference to the accompanying drawings, the technical solution of the present invention is described in detail below in combination with an in-situ thermoplastic molding method using hot water repair and a method of using the present invention.

[0014] 1) Dredging

[0015] High-pressure cleaning vehicles and sewage suction trucks are used to dredge the pipeline 100 to be repaired, remove siltation at the bottom of the pipe and scale on the pipe wall, and a pipeline multifunctional robot is used to clean out foreign objects such as tree roots, anchor rods, concrete consolidations, etc. in the pipeline.

[0016] 2) Preprocessing

[0017] Combined with the pipeline endoscopy video inspection report, corresponding technical methods are used to deal with the corresponding defects to ensure that the pipeline surface is clean after treatment, without attachments, sharp burrs, and protrusions that affect the lining.

[0018] 3) Preheating and softening of liner pipe 2

[0019] The equipment vehicle 1 is provided with a water tank 11 (steam box is no longer provided), a boiler 12, and a generator (which may not be provided on the vehicle but connected to an external generator). The boiler 12 is provided with a water outlet pipe 121 and a water return pipe 122. A detachable heat preservation board 141 is provided outside the water tank 11 and is equipped with a heat preservation water tank cover 142.

[0020] The thermoplastic material liner pipe 2 wound on the reel 20 is completely immersed in the water pool 11, and the boiler 12 gradually flows the heated water into the water pool 11 through the outlet pipe 121, and the hot water in the pool is gradually heated to the temperature required for preheating the liner pipe; after the preheating and softening of the liner pipe is completed, the hot water in the pool can re-enter the boiler for reuse through the boiler return pipe 122.

[0021] Furthermore, the water outlet pipe 121 of the boiler 12 has a connecting pipe 123 in the water pool 11, and the connecting pipe 123 can be connected to the liner pipe 2, so that the hot water is first connected with the liner pipe 2 on the reel 20 in the water pool 11. After circulating in the liner pipe 2 for one circle, the hot water enters the water pool 11 through another port of the liner pipe, and gradually submerges the liner pipe 2 wound on the reel 20, thereby improving the thermal efficiency. The temperature of the liner pipe 2 will not change drastically and no cracks will occur. When the liner pipe 2 is heated in the water pool 11, the temperature range of the hot water in the water pool 11 is 90-100°C: the heating time range is: 1h-4h, and the specific heating time depends on the pipe diameter and length.

[0022] Circulation loop setting of boiler and water tank: Circulation loop between boiler 12 and water tank 11: Boiler outlet pipe 121 is installed with gate valve, throttle valve, check valve, safety valve, pressure gauge and temperature gauge, and the opening and closing sequence is to open the throttle valve first and then the stop gate valve; Boiler return pipe 122 is installed with return water opening and closing valve, resistance regulating valve, safety valve, pressure gauge and temperature gauge, and the opening and closing sequence is to open the resistance regulating valve first and then the return water opening and closing valve.

[0023] 4) Drag in the preheated and softened liner pipe 2

[0024] When the endoscopic inspection is performed after the pretreatment is completed, the inspection robot is used to bring the nylon traction rope into the pipeline to be repaired 100. One end of the nylon traction rope is connected to the ground winch 3, and the other end is tied to the liner pipe 2. The winch 3 is started to drag the preheated and softened liner pipe 2 into the pipeline to be repaired. When the liner pipe 2 is dragged in, the winch rope (nylon traction rope) of the receiving well 101 and the liner pipe on the reel of the feeding well 102 should be firmly connected to ensure that the liner pipe enters the pipeline smoothly without scratches. The receiving well 101 and the feeding well 102 are both inspection wells, and other pipelines in the inspection wells are temporarily blocked, such as using airbags 103 for temporary blocking.

[0025] When the liner pipe 2 is dragged in, it is not necessary to take out the reel of the liner pipe 2 from the pool 11, and the reel can be directly unwound in the water tank. The liner pipe reel can be put into the pool by a forklift, and the pool is sealed after being put in. The heat-insulating pool cover 142 of the pool can be a cover that can be flipped open from the outside (that is, a pool cover composed of two hinged covers) to be used when the liner pipe 2 is unwound, and heat loss can also be minimized.

[0026] After the liner pipe reel is placed in the water pool, it can be adjusted first with the material port facing upwards and the rope tied in advance. When taking out the liner pipe wrapped on the reel in the water pool, the operator can set up a ladder, pull the liner pipe out of the water pool, and then use a winch to unwind the liner pipe and pull it into the pipeline to be repaired.

[0027] 5) Liner pipe pressurization expansion

[0028] The pool is provided with an outlet pipe 111 and a return pipe 112. The inner liner pipe 2 will cool and harden during the dragging process. After being completely dragged in, the inner liner pipe 2 is heated and softened again, and the two ends of the inner liner pipe 2 are sealed with plugs. The pool outlet pipe 111 and the return pipe 112 are respectively connected to the water inlet 131 and the water outlet 132 of the water pump. The pool outlet pipe 111 is connected to the water interface on the plug 21 at the first end of the inner liner pipe, and the pool return pipe 112 is connected to the water interface on the plug 22 at the second end of the inner liner pipe.

[0029] The hot water 110 in the water pool 11 that originally heated the liner pipe can be reused after the liner pipe 2 is dragged into the pipeline 100 to be repaired. It is passed into the liner pipe 2 in the pipeline 100 to be repaired through the water pump 131 to heat, pressurize and expand the cooled liner pipe 2; the water outlet of the second end plug 22 flows back to the water pool 11 through the return pipe 112 and the water pump 132.

[0030] When hot water 110 is passed into the inner liner pipe 2 , the inner liner pipe 2 can be pressurized by turning on the water pump 131 and turning off the water pump 132 , so that the inner liner pipe 2 is pressurized and expanded until it is tightly attached to the original pipeline 100 .

[0031] Hot water is filled into the inner liner 2 to pressurize it to expand, and the temperature range of the hot water is 90-95° C. When steam curing is adopted, the temperature of the steam varies greatly; when hot water curing is adopted, the temperature of the hot water varies slightly.

[0032] Circulation loop between the water pool 11 and the inner liner pipe 2: the water pool outlet pipe 111 is installed with a gate valve, a throttle valve, a check valve, a safety valve, a pressure gauge and a temperature gauge, and the opening and closing sequence is to open the throttle valve first and then the stop gate valve; the water pool return pipe 112 is installed with a return water opening and closing valve, a resistance regulating valve, a safety valve, a pressure gauge and a temperature gauge, and the opening and closing sequence is to open the resistance regulating valve first and then the return water opening and closing valve.

[0033] 6) Liner pipe cooling

[0034] After the inner liner pipe 2 is pressurized and expanded and restored, the hot water in the inner liner pipe 2 should be gradually cooled down while maintaining the original pressure. The following steps can be adopted: remove the pool insulation board 141, the water in the pool 11 gradually cools down naturally, turn on the water pumps 131 and 132, and the water flows back to the pool 11 through the water pumps 131 and 132, so that the water in the pool 11 and the water in the thermoplastic inner liner pipe 2 circulate and cool naturally. When the temperature drops below 40°C, release the pressure in the inner liner pipe 11.

[0035] 7) End treatment

[0036] After curing is completed, the excess liner at both ends of the well is cut off and the edges are flanging to close.

[0037] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of the present invention.

Claims

1. An equipment vehicle for in-situ thermoplastic forming repair of pipelines, comprising a carriage, characterized in that: A water tank and a boiler are arranged in the compartment of the equipment vehicle. The boiler is provided with a first water outlet pipe and a first water return pipe connected to the water tank to realize water circulation. A detachable insulation board is arranged outside the water tank and is equipped with an insulation water tank cover. The size of the water tank is matched to place a thermoplastic material lined pipe and submerge it with hot water; the water tank is provided with a second water outlet pipe and a second water return pipe, the second water outlet pipe and the second water return pipe can be respectively connected to the water-passing interfaces on the plugs at both ends of the thermoplastic material lined pipe, and the second water outlet pipe and the second water return pipe are respectively connected to water pumps.

2. The equipment vehicle for in-situ thermoplastic forming pipe repair according to claim 1, characterized in that The first water outlet pipe of the boiler is provided with a connecting pipe in the water pool, and the connecting pipe can be connected with the heated liner pipe in the water pool, so that the hot water first enters the connected thermoplastic liner pipe through the connecting pipe, and after circulating in the liner pipe once, the hot water enters the water pool through another port of the thermoplastic liner pipe and mixes into the hot water that submerges the liner pipe wound on the reel.

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