A method of repairing a manhole with continuous water construction

Abstract

The application discloses a method for continuously water construction repair of inspection wells, which can complete the detection and repair construction of the inspection well without plugging and guiding and draining, and adopts the water stop plate provided with a liquid draining one-way valve to assist the liquid draining of the inspection well, so that the inflation device can be closed after the liquid in the inspection well is drained, and the inner cavity of the inspection well does not need to be continuously inflated to maintain the liquid level in the inspection well, so that the inflation device does not need to maintain high pressure and high flow when detecting the well wall of the inspection well and when spraying and repairing the well wall of the inspection well, and the working load of the inflation device can be greatly reduced.

Description

Technical Field

[0001] This invention relates to a method for repairing inspection wells without interrupting water supply. Background Technology

[0002] Chinese patent application number 202121298986.7 discloses a method for inspecting and repairing manholes, which can complete the inspection and repair of manholes without sealing or drainage.

[0003] like Figure 1 As shown, the method for inspecting and repairing inspection wells disclosed in this patent includes the following steps:

[0004] 1) Fix the sealing cover plate 4 to the top of the manhole wall of the inspection well 8, and form a seal between the sealing cover plate 4 and the manhole wall of the inspection well 8;

[0005] 2) The inflation device inflates the inner cavity of the inspection well 8 below the sealing cover plate 4 through the inflation pipe 13 (the inflation pipe 13 is externally connected to the inflation hole on the top surface of the sealing cover plate 4, and the inflation hole is connected to the inner cavity of the inspection well 8 below the sealing cover plate 4), causing the liquid level in the inspection well 8 to drop intermittently to the bottom of the inspection well 8; and during the intermittent period of the liquid level drop in the inspection well 8, the well wall of the inspection well is inspected through the pipe periscope 17 preset below the sealing cover plate 4 until the inspection well 8 is completely inspected; and during the intermittent period of the liquid level drop in the inspection well 8, the inflation device continues to inflate (controlling the air pressure and air volume) to maintain the liquid level in the inspection well 8.

[0006] 3) After the inspection of manhole 8 is completed, the manhole wall of manhole 8 is sprayed and repaired by the spraying equipment 12 pre-installed below the sealing cover plate 4; and before the spraying and repair work is completed, the air filling device is continuously filled with air (controlling the air pressure and air volume) to keep the liquid level in manhole 8 at the bottom of manhole 8.

[0007] 4) After the spraying repair work is completed, stop filling the cavity of manhole 8 with air or actively vent the cavity of manhole 8; after the air pressure inside manhole 8 drops to basically the same as the outside air pressure, remove the sealing cover plate 4 and cover it with the original manhole cover.

[0008] The method for inspecting and repairing inspection wells disclosed in this patent has the following drawbacks: The patent uses an air-filling device to inflate the inner cavity of the inspection well 8 below the sealing cover plate 4, causing the liquid level in the inspection well 8 to drop intermittently to the bottom of the inspection well 8; during the intermittent periods of liquid level drop in the inspection well 8, the air-filling device needs to continuously inflate (controlling air pressure and volume) to maintain the liquid level in the inspection well 8; and before the spraying repair work is completed, the air-filling device still needs to continuously inflate (controlling air pressure and volume) to keep the liquid level 18 of the inspection well at the bottom of the inspection well 8; due to the unavoidable air leakage, the pumping volume of the air-filling device needs to be large enough; if the inspection well is deep and the liquid level is high, the pressure of the air-filling device needs to be greater than the head pressure from the water surface in the inspection well 8 to the inlet of the sewage pipe 19; it can be seen that the air-filling device needs to maintain high pressure and high flow rate throughout the process, and the workload of the air-filling device is large. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a method for repairing inspection wells without interrupting water supply, comprising the following steps:

[0010] 1) The baffle plate with the drain check valve is fixed flat at the bottom of the inspection well wall, and a seal is formed between the baffle plate and the inspection well wall; and the drain check valve is opened, which allows liquid above the baffle plate to flow to the bottom of the baffle plate.

[0011] 2) Fix the sealing cover plate to the top of the inspection well wall and form a seal between the sealing cover plate and the inspection well wall;

[0012] 3) The inflation device inflates the inspection well cavity below the sealing cover through the inflation pipe (the inflation pipe is connected to the inflation hole on the top surface of the sealing cover, and the inflation hole is connected to the inspection well cavity below the sealing cover), so that the liquid above the baffle plate in the inspection well is discharged downward through the drain check valve on the baffle plate, and the process of the liquid level in the inspection well is observed through the pipe periscope preset below the sealing cover until the liquid above the baffle plate in the inspection well is completely drained; and when the liquid above the baffle plate in the inspection well is completely drained, the inflation device is turned off.

[0013] 4) After the inflation device is closed, the manhole wall is inspected through the pipe periscope pre-installed under the sealing cover until the manhole is inspected.

[0014] 5) After the inspection of the manhole is completed, the manhole wall is sprayed and repaired using a spraying device pre-installed under the sealing cover.

[0015] 6) After the spraying repair work is completed, and after the air pressure inside the inspection well drops to basically the same as the outside air pressure (you can actively vent the air from the inside of the inspection well), remove the sealing cover.

[0016] 7) After removing the sealing cover, remove and take out the water-blocking plate, and replace it with the original well cover.

[0017] Preferably, a circular airbag is fitted on the side circumferential surface of the baffle plate, and the inner ring of the circular airbag is fixedly connected to the side circumferential surface of the baffle plate; by inflating the circular airbag on the side circumferential surface of the baffle plate, the baffle plate is fixed to the bottom of the inspection well wall.

[0018] Preferably, the outer ring of the annular airbag on the side periphery of the baffle plate is also fitted with an elastic sealing ring, the inner ring of which is fixedly connected to the outer ring of the annular airbag on the side periphery of the baffle plate; the elastic sealing ring forms a seal between the baffle plate and the manhole wall.

[0019] Preferably, when removing the baffle plate, the annular airbags on the side periphery of the baffle plate are deflated to detach the baffle plate from the manhole wall.

[0020] Preferably, the baffle plate is also equipped with a liquid inlet check valve; after the sealing cover is removed, the liquid inlet check valve is opened first, and the liquid inlet check valve is opened to allow the liquid below the baffle plate to pass to the top of the baffle plate; after the liquid level above the baffle plate rises and stabilizes, the baffle plate is removed and taken out.

[0021] The advantages and beneficial effects of the present invention are as follows: it provides a method for repairing inspection wells without interrupting water supply, which can complete the inspection and repair of inspection wells without sealing and drainage, and can greatly reduce the workload of the air filling device.

[0022] This invention can drain the liquid (the liquid above the baffle plate) from the inspection well in one go, and the air filling device can be turned off after draining the liquid from the inspection well. It is not necessary to continuously fill the inner cavity of the inspection well to maintain the liquid level (the baffle plate can prevent the drained liquid from flowing back to the baffle plate before the liquid inlet check valve is opened). Therefore, the air filling device does not need to maintain high pressure and high flow rate when inspecting the inspection well wall and when spraying and repairing the inspection well wall, which can greatly reduce the workload of the air filling device.

[0023] Before removing the baffle plate, the present invention first opens the liquid inlet check valve to allow the liquid below the baffle plate to flow back to the top of the baffle plate, which can release the water pressure below the baffle plate and avoid the impact of the water pressure below the baffle plate when the baffle plate is directly removed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of existing technology;

[0025] Figure 2 This is a schematic diagram of the present invention. Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] The specific technical solution of this invention is as follows:

[0028] like Figure 2 As shown, a method for repairing a manhole 8 without interrupting water supply includes the following steps:

[0029] 1) The baffle plate 21, which is equipped with a drain check valve and a drain check valve, is fixed flat at the bottom of the inspection well 8, and a seal is formed between the baffle plate 21 and the inspection well 8; and the drain check valve is opened, which allows liquid above the baffle plate 21 to pass down the baffle plate 21 after it is opened.

[0030] Specifically:

[0031] A circular airbag is fitted on the side circumference of the baffle plate 21, and the inner ring of the circular airbag is fixed to the side circumference of the baffle plate 21; by inflating the circular airbag on the side circumference of the baffle plate 21, the baffle plate 21 is fixed to the bottom of the inspection well wall 8.

[0032] An elastic sealing ring is fitted around the outer ring of the annular airbag on the side circumference of the baffle plate 21. The inner ring of the elastic sealing ring is fixedly connected to the outer ring of the annular airbag on the side circumference of the baffle plate 21. The elastic sealing ring forms a seal between the baffle plate 21 and the wall of the inspection well 8.

[0033] 2) Fix the sealing cover plate 4 to the top of the manhole wall of the inspection well 8, and form a seal between the sealing cover plate 4 and the manhole wall of the inspection well 8;

[0034] 3) The inflation device inflates the inner cavity of the inspection well 8 below the sealing cover plate 4 through the inflation pipe 13 (the inflation pipe 13 is externally connected to the inflation hole on the top surface of the sealing cover plate 4, and the inflation hole is connected to the inner cavity of the inspection well 8 below the sealing cover plate 4), so that the liquid above the baffle plate 21 in the inspection well 8 is discharged downward through the drain check valve on the baffle plate 21, and the process of the liquid level in the inspection well is observed through the pipe periscope 17 preset below the sealing cover plate 4 until the liquid above the baffle plate 21 in the inspection well 8 is completely drained; and when the liquid above the baffle plate 21 in the inspection well 8 is completely drained, the inflation device is turned off.

[0035] 4) After the inflation device is closed, the wall of the inspection well 8 is inspected through the pipe periscope 17 pre-installed below the sealing cover plate 4 until the inspection well 8 is inspected.

[0036] 5) After the inspection of manhole 8 is completed, the manhole wall of manhole 8 is sprayed and repaired using the spraying equipment 12 pre-installed below the sealing cover plate 4.

[0037] 6) After the spraying repair work is completed, and after the air pressure inside the inspection well 8 drops to basically the same as the outside air pressure (you can actively vent the air from the inside of the inspection well 8), remove the sealing cover plate 4;

[0038] 7) After the sealing cover plate 4 is removed, first open the liquid inlet check valve. After the liquid inlet check valve is opened, it only allows the liquid below the baffle plate 21 to pass to the top of the baffle plate 21. After the liquid level above the baffle plate 21 rises and stabilizes, remove the baffle plate 21 and take it out, and cover it with the original well cover.

[0039] Specifically:

[0040] When removing the baffle plate 21, the annular airbag on the side of the baffle plate 21 is deflated to detach the baffle plate 21 from the wall of the inspection well 8.

[0041] This invention can drain the liquid in the inspection well 8 (the liquid above the baffle plate 21) in one go, and the air filling device can be turned off after draining the liquid in the inspection well 8. It is not necessary to continuously fill the inner cavity of the inspection well 8 with air in order to maintain the liquid level in the inspection well 8 (before opening the liquid inlet check valve, the baffle plate 21 can prevent the drained liquid from flowing back to the baffle plate 21). Therefore, the air filling device does not need to maintain high pressure and high flow rate when inspecting the wall of the inspection well 8 and when spraying and repairing the wall of the inspection well 8, which can greatly reduce the workload of the air filling device.

[0042] Before removing the baffle plate 21, the present invention first opens the liquid inlet check valve to allow the liquid below the baffle plate 21 to flow back to the top of the baffle plate 21, which can release the water pressure below the baffle plate 21 and avoid the impact of the water pressure below the baffle plate 21 due to the direct removal of the baffle plate 21.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of rehabilitating a manhole with a live water construction, characterized in that, It comprises the following steps: 1) the water stop plate provided with a drainage one-way valve is fixed horizontally on the bottom of the inspection well wall, and a seal is formed between the water stop plate and the inspection well wall; and the drainage one-way valve is opened, which only allows the liquid above the water stop plate to pass downward; 2) the sealing cover plate is fixed on the top of the inspection well wall, and a seal is formed between the sealing cover plate and the inspection well wall; 3) the inflation device inflates the inspection well cavity below the sealing cover plate through the inflation pipe, so that the liquid above the water stop plate in the inspection well is discharged downward through the drainage one-way valve on the water stop plate, and the lowering process of the liquid surface in the inspection well is observed through the pipeline periscope preset below the sealing cover plate until the liquid above the water stop plate in the inspection well is discharged; and when the liquid above the water stop plate in the inspection well is discharged, the inflation device is closed; 4) after the inflation device is closed, the inspection well wall is detected through the pipeline periscope preset below the sealing cover plate until the inspection well is detected; 5) after the inspection well is detected, the inspection well wall is sprayed and repaired through the spraying equipment preset below the sealing cover plate; 6) after the spraying and repairing construction is completed, and when the air pressure in the inspection well is reduced to the same as the external air pressure, the sealing cover plate is removed; 7) after the sealing cover plate is removed, the water stop plate is removed and taken out, and the original manhole cover is covered.

2. The method of repairing a manhole with a continuous water construction according to claim 1, characterized in that A circular ring type air bag is sleeved on the side surface of the water stop plate, and the inner ring of the circular ring type air bag is fixed to the side surface of the water stop plate; the water stop plate is fixed on the bottom of the inspection well wall by inflating the circular ring type air bag on the side surface of the water stop plate.

3. The method of repairing a manhole with a continuous water construction according to claim 2, characterized in that, The outer ring of the circular ring type air bag on the side surface of the water stop plate is further sleeved with an elastic sealing ring, and the inner ring of the elastic sealing ring is fixed to the outer ring of the circular ring type air bag on the side surface of the water stop plate; the elastic sealing ring forms a seal between the water stop plate and the inspection well wall.

4. The method of repairing a manhole with a continuous water construction according to claim 3, characterized in that When the water stop plate is removed, the circular ring type air bag on the side surface of the water stop plate is deflated, so that the water stop plate is separated from the inspection well wall.

5. The method of repairing a manhole with a continuous water construction according to claim 4, characterized in that, The water stop plate is further provided with a liquid inlet one-way valve; after the sealing cover plate is removed, the liquid inlet one-way valve is opened, which only allows the liquid below the water stop plate to pass upward; after the liquid surface above the water stop plate rises stably, the water stop plate is removed and taken out.

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