Construction technology and device for repairing underground pipe of operation subway contact channel through gas turnover method

Abstract

The invention provides an operation subway contact channel concealed conduit gas turnover method repair construction process and device. The device comprises turnover complete equipment, polyester fiber cloth, a gas connector regulation and control device and a steam generator. The turnover complete equipment and the gas joint regulation and control device are arranged in the operation subway and are positioned at the two ends of the drainage pipeline; the polyester fiber cloth infiltrates the epoxy material and is overturned into the drainage pipeline through the overturning complete equipment; the steam generator is arranged on the turnover complete equipment and generates steam, so that the steam passes through the drainage pipeline through the gas connector regulation and control device, and the polyester fiber cloth is tightly attached to the inner wall of the drainage pipeline; the curing time of the epoxy material at normal temperature is more than 10 hours, and the high-temperature curing time is less than 1 hour; the epoxy material is infiltrated in advance, is loaded into turnover complete equipment on a construction site, and is rapidly cured within the limit of a 2.5-hour subway skylight operation period. The invention relates to the technical field of metro maintenance, and can solve the problem of inconvenient repair of drainage pipelines of connecting channels of operating metro in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of subway maintenance, and particularly relates to a construction process and device for repairing the hidden pipes in the connection passage of an operating subway by the air turning method. Background Art

[0002] The drainage pipes in the connection passage of an operating subway are made of cast iron with a diameter of DN200, and these drainage pipes are hidden pipes. After long-term use, serious corrosion problems have occurred inside the drainage pipes, so these drainage pipes must be repaired.

[0003] However, due to the operating characteristics of the subway tunnel, the construction time is limited (at most 3 hours for each construction point each time), and the construction space is narrow, with an average distance of about 1 km from the subway station entrance. The traditional excavation repair and conventional trenchless repair methods take a long time and are not suitable for the repair work of the drainage pipes in the connection passage of an operating subway. Therefore, a construction process and device for repairing the hidden pipes in the connection passage of an operating subway by the air turning method are needed to solve the problem of inconvenient repair of the drainage pipes in the connection passage of an operating subway in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction process and device for repairing the hidden pipes in the connection passage of an operating subway by the air turning method, which can solve the problem of inconvenient repair of the drainage pipes in the connection passage of an operating subway in the prior art.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A construction device for repairing the hidden pipes in the connection passage of an operating subway by the air turning method includes: a flipping complete set of equipment, a polyester fiber cloth, a gas joint control device, and a steam generator; the flipping complete set of equipment and the gas joint control device are arranged in the operating subway and are respectively located at both ends of the drainage pipe; the polyester fiber cloth is impregnated with epoxy material and is flipped into the drainage pipe through the flipping complete set of equipment; the steam generator is arranged on the flipping complete set of equipment and generates steam, so that the steam passes through the drainage pipe through the gas joint control device and closely adheres the polyester fiber cloth to the inner wall of the drainage pipe.

[0007] The flipping complete set of equipment includes an air turning drum with a winch and a display, a pressure monitor, a temperature monitor, and a bypass valve installed on the air turning drum.

[0008] The weight of the air turning drum is less than 20 kg, and it can be used for repairing drainage pipes within 30 m and in the range of 5 cm - 50 cm.

[0009] The gas joint control device is provided with a micro gas regulating valve.

[0010] The epoxy material described above includes component A and component B. Among them, component A consists of more than 50% bisphenol A epoxy resin and 5%-40% aliphatic glycidyl ether epoxy resin, and component B consists of more than 50% modified polyesteramine curing agent, 10%-30% phenolic curing agent, and 1%-20% alicyclic amine curing agent, enabling the epoxy material to have a curing time greater than 10 hours at room temperature and a curing time less than 1 hour at high temperature.

[0011] The epoxy material described above is pre-infiltrated with polyester fiber cloth in the factory. The polyester fiber cloth is then transported to the construction site and loaded into the flipping equipment set, and the epoxy material is rapidly cured through steam within the 2.5-hour operation subway skylight period limit.

[0012] A construction process for a construction device using the air-turning method for repairing hidden pipes in an operating subway connection passage includes the following steps:

[0013] Step 1: Use a high-pressure pipeline cleaning machine to clean the floating ash and rust loose bodies in the drainage pipeline, and shoot video images before and after cleaning.

[0014] Step 2: Transport the construction device using the air-turning method for repairing hidden pipes in the operating subway connection passage to the construction site, and use the flipping equipment set to flip the polyester fiber cloth fully infiltrated with the specially prepared epoxy material onto the inner wall of the drainage pipeline.

[0015] Step 3: Generate steam through a steam generator and make the steam pass through the drainage pipeline under the action of the gas joint control device, so that the polyester fiber cloth closely adheres to the inner wall of the drainage pipeline and is heated and cured.

[0016] Step 4: Conduct video recording inside the drainage pipeline after repair.

[0017] Step 5: If there are exposed steel parts outside the drainage pipeline, use fiber cloth to wrap the exposed steel parts, and then apply epoxy on the fiber cloth to fully wrap the exposed steel parts.

[0018] In step 3 described above, during the heating and curing process of the polyester fiber cloth, make the steam pass through the drainage pipeline through the micro gas regulating valve of the gas joint control device, and adjust the air pressure inside the drainage pipeline so that the polyester fiber cloth can closely adhere to the inner wall of the drainage pipeline and be cured.

[0019] In step 3 described above, after the polyester fiber cloth is cured, cut off the part of the polyester fiber cloth that protrudes from the drainage pipeline.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The construction device of the present invention is provided with a flipping complete set of equipment, a polyester fiber cloth, a gas joint control device, and a steam generator. The flipping complete set of equipment flips the polyester fiber cloth soaked with epoxy material into the drainage pipe. The steam generator and the gas joint control device form a certain pressure in the drainage pipe and heat the polyester fiber cloth, so that the polyester fiber cloth can be quickly cured and closely adhered to the inner wall of the drainage pipe, and can quickly repair the drainage culvert without affecting the normal operation of the subway.

[0022] 2. The construction process of the present invention is simple and efficient, can be constructed in a narrow space, is suitable for the anti-corrosion construction and defect repair of the inner wall of non-collapsed pipes, especially suitable for the repair construction of the culvert in the operation subway connection passage, and is not restricted by the construction time and construction conditions of the operation subway. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By describing the exemplary embodiments of the present disclosure in more detail in conjunction with the accompanying drawings, the above and other objects, features, and advantages of the present disclosure will become more obvious. Among them, in the exemplary embodiments of the present disclosure, the same reference numerals generally represent the same components.

[0024] Figure 1 is the construction schematic diagram of the air flipping method repair construction device for the culvert in the operation subway connection passage of the present invention;

[0025] Figure 2 is the structural schematic diagram of the gas joint control device in the air flipping method repair construction device for the culvert in the operation subway connection passage of the present invention.

[0026] In the figure, 1 is the flipping complete set of equipment, 2 is the drainage pipe, 3 is the polyester fiber cloth, 4 is the gas joint control device, 5 is the steam generator, and 6 is the micro gas regulating valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further details a repair construction process and device for the air flipping method of the culvert in the operation subway connection passage proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.

[0028] Please refer to the appendix Figure 1, An operating subway connection passage dark pipe air-turning method repair construction device, including a turning complete set of equipment 1, a polyester fiber cloth 3, a gas joint control device 4 and a steam generator 5; the turning complete set of equipment 1 and the gas joint control device 4 are arranged in the operating subway and are respectively located at both ends of the drainage pipe 2; the polyester fiber cloth 3 is infiltrated with epoxy material and is turned into the drainage pipe 2 through the turning complete set of equipment 1; the steam generator 5 is arranged on the turning complete set of equipment 1 and generates steam, so that the steam passes through the drainage pipe 2 through the gas joint control device 4 and closely adheres the polyester fiber cloth 3 to the inner wall of the drainage pipe 2.

[0029] Preferably, the epoxy material infiltrating the polyester fiber cloth 3 can be formulated according to actual repair requirements. The requirements are that the epoxy material does not cure at room temperature for 10 hours and can cure within 1 hour when heated by the steam of the steam generator 5 to 80°C. The polyester fiber cloth 3 can be fully infiltrated in the factory and transported to the site to meet the special requirements of rapid curing repair, so as to meet the requirement of completing the repair construction within the 2.5-hour skylight period of subway operation.

[0030] Preferably, the turning complete set of equipment 1 can adopt a portable turning complete set of equipment in the prior art, which is convenient to use in narrow spaces such as subway tunnels, and is used to turn the polyester fiber cloth 3 into the drainage pipe 2, facilitating the repair of the inner wall of the drainage pipe 2, meeting the requirements of dark pipe repair, and being simpler and faster than traditional excavation repair welding and trenchless repair methods.

[0031] The steam generator 5 is used to generate steam, and the gas joint control device 4 controls the speed of the steam discharging from the drainage pipe 2, thereby controlling the pressure and temperature inside the drainage pipe 2. The steam passes through the drainage pipe 2 under the action of the gas joint control device 4 and heats and cures the polyester fiber cloth 3 turned into the drainage pipe 2. At the same time, a certain internal pipe pressure is formed inside the drainage pipe 2 to ensure that the polyester fiber cloth 3 closely adheres to the inner wall of the drainage pipe 2 and enables the polyester fiber cloth 3 to repair the rusted parts on the inner wall of the drainage pipe 2 after rapid curing.

[0032] The described turning complete set of equipment 1 includes an air-turning drum (not shown in the figure) with a winch (not shown in the figure) and a display (not shown in the figure), a pressure monitor (not shown in the figure), a temperature monitor (not shown in the figure) and a bypass valve (not shown in the figure) installed on the air-turning drum.

[0033] The winch is used to turn the polyester fiber cloth 3 into the drainage pipe 2. The inside of the air-turning drum is a closed chamber, and the pressure of the closed chamber can be adjusted by the opening and closing of the bypass valve. The pressure inside the closed chamber is monitored in real time through the pressure monitor, and the temperature inside the closed chamber is monitored in real time through the temperature monitor to ensure that the winch can work within a safe pressure and temperature range.

[0034] The main working process of the air - turning drum is as follows: Wrap the polyester fiber cloth 3 in the closed chamber, then inject high - pressure air into the closed chamber, and turn out the polyester fiber cloth 3 through the winch, so as to turn the polyester fiber cloth 3 into the drainage pipe 2. The air - turning drum is a mature product of the existing technology, and its specific structure and working principle will not be elaborated here.

[0035] Preferably, the weight of the air - turning drum is less than 20 kg. The air - turning drum can be applied to the repair of drainage pipes 2 within 30 m and in the range of 5 cm - 50 cm, and is especially suitable for the construction conditions of long - distance manual transportation such as subway side channels.

[0036] Please refer to the appendix Figure 2 , and a micro - gas regulating valve 6 is provided on the gas joint regulating device 4.

[0037] Control the speed of steam discharging from the drainage pipe 2 by adjusting the opening of the micro - gas regulating valve 6, so as to control the pressure and temperature inside the drainage pipe 2.

[0038] The epoxy material includes component A and component B. Among them, component A is composed of more than 50% bisphenol A epoxy resin and 5% - 40% aliphatic glycidyl ether epoxy resin, and component B is composed of more than 50% modified polyesteramine curing agent, 10% - 30% phenolic curing agent, and 1% - 20% alicyclic amine curing agent, so that the epoxy material can have a curing time greater than 10 h at room temperature and a curing time less than 1 h at high temperature to meet the construction restrictions during the subway operation skylight period.

[0039] The epoxy material is pre - infiltrated into the polyester fiber cloth 3 in the factory. The polyester fiber cloth 3 is loaded into the flipping complete set of equipment 1 at the construction site, and the epoxy material is quickly cured by steam within the 2.5 - h subway operation skylight period limit, ensuring the rapid repair of the drainage pipe 2 without affecting subway operation at the same time.

[0040] Please refer to the appendix Figure 1 and the appendix Figure 2 , a construction technology for repairing the hidden pipe of the subway connection channel by the air - turning method, includes the following steps:

[0041] Step 1: Use a high - pressure pipeline cleaning machine to clean the floating ash and rust - loosened bodies in the drainage pipe 2, and shoot video images before and after cleaning.

[0042] The high - pressure pipeline cleaning machine is a commonly used pipeline cleaning device in this field, and its working process and working principle will not be elaborated here.

[0043] Insert shooting equipment such as a camera into the drainage pipe 2 to take video images of the inside of the cleaned drainage pipe 2 to ensure the full cleaning of the floating ash and rust - loosened bodies.

[0044] Step 2: Transport the construction device for repairing the hidden pipe of the subway connection channel by the air turning method to the construction site, and turn the polyester fiber cloth 3 fully soaked with the specially prepared epoxy material onto the inner wall of the drainage pipe 2 through the turning complete set of equipment 1.

[0045] Step 3: Generate steam through the steam generator 5 and make the steam pass through the drainage pipe 2 under the action of the gas joint control device 4, so that the polyester fiber cloth 3 closely adheres to the inner wall of the drainage pipe 2 and is heated and cured.

[0046] In the said Step 3, during the heating and curing process of the polyester fiber cloth 3, make the steam pass through the drainage pipe 2 through the micro gas regulating valve 6 of the gas joint control device 4, and adjust the air pressure in the drainage pipe 2, so that the polyester fiber cloth 3 can closely adhere to the inner wall of the drainage pipe 2 and be quickly heated and cured.

[0047] In the said Step 3, after the polyester fiber cloth 3 is cured, cut off the part of the polyester fiber cloth 3 protruding from the drainage pipe 2.

[0048] Step 4: Conduct video recording inside the repaired drainage pipe 2 to ensure effective repair of the rusty parts inside the drainage pipe 2.

[0049] Step 5: If there are exposed steel parts outside the drainage pipe 2 (that is, the rusty parts on the outer wall of the drainage pipe 2), wrap the exposed steel parts with fiber cloth, and then apply epoxy on the fiber cloth to fully wrap the exposed steel parts.

[0050] According to the particularity of the subway operation time, the construction time can be set within the construction point skylight period from 0:00 to 3:00. The construction process is mainly divided into three processes, namely: perform pre-treatment on the drainage pipe 2 through Step 1, perform the turning construction of the polyester fiber cloth 3 inside the drainage pipe 2 through Step 2, and perform curing and joint treatment on the polyester fiber cloth 3 through Step 3, so as to effectively repair the corrosion of the drainage pipe 2 without affecting the normal operation of the subway.

[0051] Effectively repair the corrosion on the inner wall of the drainage pipe 2 through Step 3, and effectively repair the corrosion on the outer wall of the drainage pipe 2 through Step 5, ensuring the corrosion repair effect of the drainage pipe 2.

[0052] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the technical field of the present invention according to the above disclosure shall fall within the protection scope of the claims.

Claims

1. A repair construction device for underground pipelines in operating subway communication passages by gas-turning method, characterized in that: include: A turning equipment set (1), a polyester fiber cloth (3), a gas joint control device (4) and a steam generator (5); the turning equipment set (1) and the gas joint control device (4) are arranged in an operating subway and are respectively located at both ends of a drainage pipe (2); the polyester fiber cloth (3) is impregnated with epoxy material and turned into the drainage pipe (2) by the turning equipment set (1); the steam generator (5) is arranged on the turning equipment set (1) and generates steam, so that the steam passes through the drainage pipe (2) through the gas joint control device (4), and the polyester fiber cloth (3) is closely attached to the inner wall of the drainage pipe (2).

2. The repair construction device for the underground pipeline of the operating subway communication channel according to claim 1 is characterized in that: The complete set of turning equipment (1) comprises an air turning drum with a winch and a display, a pressure monitor, a temperature monitor and a bypass valve installed on the air turning drum.

3. The repair construction device for the underground pipeline of the operating subway communication channel according to claim 2 is characterized in that: The weight of the air drum is less than 20 kg and can be used to repair drainage pipes (2) within 30 m and within the range of 5 cm to 50 cm.

4. The repair construction device for the underground pipeline of the operating subway communication channel according to claim 1 is characterized in that: The gas joint control device (4) is provided with a trace gas regulating valve (6).

5. The repair construction device for the underground pipeline of the operating subway communication channel according to claim 1 is characterized in that: The epoxy material includes component A and component B, wherein component A is composed of more than 50% bisphenol A epoxy resin and 5%-40% aliphatic glycidyl ether epoxy resin, and component B is composed of more than 50% modified polyester amine curing agent, 10%-30% phenolic curing agent, and 1%-20% alicyclic amine curing agent, so that the epoxy material can be cured for more than 10 hours at room temperature and less than 1 hour at high temperature.

6. The repair construction device for the underground pipeline of the operating subway communication channel according to claim 1 or 5, characterized in that: The epoxy material is impregnated with polyester fiber cloth (3) in advance in the factory, and the polyester fiber cloth (3) is loaded into the flipping complete set of equipment (1) at the construction site, and the epoxy material is quickly cured by steam within the 2.5-hour operating subway skylight period.

7. A construction process for repairing the underground pipe of an operating subway connecting passage by pneumatic flipping method according to claim 4, characterized in that: The following steps are involved: Step 1: Use a high-pressure pipe cleaning machine to clean the floating dust and rust loose bodies in the drainage pipe (2), and take video images before and after the cleaning; Step 2: transport the underground pipe repair construction device of the operating subway connecting channel to the construction site, and flip the polyester fiber cloth (3) fully soaked with the specially formulated epoxy material onto the inner wall of the drainage pipe (2) by flipping the complete set of equipment (1); Step 3: generating steam through a steam generator (5) and passing the steam through the drainage pipe (2) under the action of a gas joint control device (4), so that the polyester fiber cloth (3) is closely attached to the inner wall of the drainage pipe (2) and is heated and solidified; Step 4: Recording the video inside the drainage pipe (2) after repair; Step 5: If there is any exposed steel part on the outside of the drainage pipe (2), wrap the exposed steel part with fiber cloth, and then apply epoxy on the fiber cloth to fully wrap the exposed steel part.

8. The construction process according to claim 7, characterized in that: In the aforementioned step 3, during the heating and curing process of the polyester fiber cloth (3), steam is passed through the drainage pipe (2) via the trace gas regulating valve (6) of the gas joint control device (4), and the air pressure in the drainage pipe (2) is adjusted, so that the polyester fiber cloth (3) can be closely attached to the inner wall of the drainage pipe (2) and cured.

9. The construction process according to claim 7, characterized in that: In the step 3, after the polyester fiber cloth (3) is solidified, the portion of the polyester fiber cloth (3) protruding from the drainage pipe (2) is cut off.

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