A well sealing method with a recyclable device type and a detachable airbag type well sealing device

Abstract

The invention discloses a well sealing method of a recyclable device type and a detachable airbag type well sealing device, belonging to the field of dewatering technology. It includes a sleeve, a sealing cover arranged on the upper part of the sleeve, a bottom plate fixed on the lower part of the sleeve, and a middle plate located between the sealing cover and the bottom plate and fixed inside the sleeve. Well pipe holes are provided on both the middle plate and the bottom plate, a grouting hole and a drainage hole are provided on the sealing cover, a drainage chamber is formed between the sealing cover, the middle plate and the sleeve, a sealing chamber is formed between the bottom plate, the middle plate and the sleeve, an airbag is arranged in the sealing chamber, and valves are arranged on both the grouting hole and the drainage hole. By arranging a sleeve on the well pipe, and arranging a sealing chamber and an airbag for sealing and a drainage chamber for drainage on the sleeve, the purpose of both sealing the well and recycling can be achieved.

Description

Technical Field

[0001] The present invention relates to a well sealing method and device, in particular to a well sealing method with a recyclable device and a detachable airbag type well sealing device, belonging to the field of dewatering technology. Background Art

[0002] In traditional deep foundation pit dewatering projects, when sealing wells, generally after removing the submersible pump, a large amount of concrete is directly poured into the well pipe. By using the gravity of a sufficient amount of concrete combined with a large amount of cement powder, it is poured into the wellbore and quickly solidifies to seal the well. However, this method is not suitable for high water level areas and areas with large water inflows, especially when the water pressure of the river water is relatively large. After removing the submersible pump, the solidification time of the concrete is insufficient, and the concrete is washed away. If there is no drainage device installed on the wellbore, the groundwater and concrete will flow randomly, affecting the waterproof effect and causing leakage of the foundation floor slab. Therefore, a device that can be used for well sealing under large water volume and water pressure conditions and is convenient for recycling, as well as a method and steps for using this device to seal wells, are needed. Summary of the Invention

[0003] The main purpose of the present invention is to provide a well sealing method with a recyclable device and a detachable airbag type well sealing device. By setting a sleeve on the well pipe, a sealing chamber and an airbag for sealing, as well as a drainage chamber for drainage, on the sleeve, the purpose of both sealing the well and being recyclable can be achieved.

[0004] The object of the present invention can be achieved by adopting the following technical solutions:

[0005] A well sealing method with a recyclable device, characterized in that: the device includes a sleeve sleeved on the well pipe, and a ring-shaped bottom plate, a ring-shaped middle plate and a detachably connected sealing cover sequentially arranged inside the sleeve from bottom to top. An annular airbag is arranged between the bottom plate and the middle plate. The well sealing method includes the following steps:

[0006] Step 1: Place the annular airbag between the bottom plate and the middle plate, and then sleeve the annular airbag, the bottom plate and the middle plate on the well pipe;

[0007] Step 2: Cover the sealing cover on the sleeve to seal it, and then fix the sleeve on the well pipe or a nearby stable object;

[0008] Step 3: Inflate the airbag to make it expand and closely contact the well pipe;

[0009] Step 4: Insert a grouting pipe into the well pipe through the grouting hole on the sealing cover for grouting or pouring concrete, and at the same time open the drainage hole on the sealing cover to drain the water in the well pipe;

[0010] Step Five: After the grouting or pouring is completed, remove the grouting pipe, deflate the airbag, and then remove the sleeve.

[0011] Step Six: If the grouting liquid or concrete overflows into the sleeve and solidifies, open the sealing cover, remove the solidified matter, and then remove the sleeve.

[0012] A detachable airbag type well sealing device includes a sleeve, a sealing cover arranged on the upper part of the sleeve, a bottom plate fixed on the lower part of the sleeve, and a middle plate located between the sealing cover and the bottom plate and fixed inside the sleeve. Well pipe holes are provided on both the middle plate and the bottom plate. A grouting hole and a drainage hole are provided on the sealing cover. A drainage chamber is formed between the sealing cover, the middle plate and the sleeve. A sealing chamber is formed between the bottom plate, the middle plate and the sleeve. An airbag is arranged in the sealing chamber. Valves are provided on both the grouting hole and the drainage hole.

[0013] Preferably, the airbag is an annular airbag, and an air charging pipe for inflation and deflation is provided on the airbag.

[0014] Preferably, the air charging pipe is connected to an external inflation device, and an inflation hole for the air charging pipe to pass through is provided on the side wall of the sealing chamber.

[0015] Preferably, the air charging pipe is connected to an external inflation device through the well pipe hole on the lower side; or the air charging pipe is connected to an external inflation device through the well pipe hole on the upper side and the drainage hole in sequence.

[0016] Preferably, the sealing cover is detachably connected to the sleeve, including snap connection and threaded connection.

[0017] Preferably, a fixing device for external fixed connection is provided on the sleeve, including a chain, a clamp and a bolt.

[0018] The beneficial technical effects of the present invention:

[0019] According to the well sealing method of the recyclable device type of the present invention, by using the expansion and compression of the airbag and the method of the detachable sealing cover, the sleeve and the well pipe can be quickly separated, and the device can be recycled and reused.

[0020] According to the detachable airbag type well sealing device of the present invention, by arranging a detachable sealing cover on the wellbore, deflating the airbag after well sealing, then removing the sealing cover and knocking off the concrete, the entire sleeve can be removed and recycled for the next well sealing. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall internal structure of a preferred embodiment of the detachable airbag type well sealing device according to the present invention;

[0022] Figure 2 Schematic diagram of the internal structure sleeved on the well pipe according to a preferred embodiment of the detachable airbag type well sealing device of the present invention;

[0023] Figure 3 Schematic diagram of the overall structure according to a preferred embodiment of the detachable airbag type well sealing device of the present invention;

[0024] Figure 4 Schematic diagram of the overall structure from another angle according to a preferred embodiment of the detachable airbag type well sealing device of the present invention.

[0025] In the figure: 1 - sleeve, 2 - sealing cover, 3 - middle plate, 4 - bottom plate, 5 - well pipe hole, 6 - grouting hole, 7 - drainage hole, 8 - drainage chamber, 9 - sealing chamber, 10 - airbag, 11 - air filling pipe. Specific embodiments

[0026] To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0027] As Figures 1 - 4 shown, the well sealing method of the recyclable device type provided in this embodiment includes the following steps:

[0028] Step 1: Place the annular airbag 10 between the bottom plate 4 and the middle plate 3, and then sleeve the annular airbag 10, the bottom plate 4, and the middle plate 3 on the well pipe;

[0029] Step 2: Cover the sealing cover 2 on the sleeve 1 for sealing, and then fix the sleeve 1 on the well pipe or a nearby stable object;

[0030] Step 3: Inflate the airbag 10 to make it expand and closely contact the well pipe;

[0031] Step 4: Insert the grouting pipe into the well pipe through the grouting hole on the sealing cover 2 for grouting or pouring concrete, and at the same time open the drainage hole on the sealing cover 2 to drain the water in the well pipe;

[0032] Step 5: After the grouting or pouring is completed, remove the grouting pipe, deflate the airbag 10, and then remove the sleeve 1;

[0033] Step 6: If the grouting liquid or concrete overflows into the sleeve 1 and solidifies, open the sealing cover 2, remove the solidified matter, and then remove the sleeve 1.

[0034] As Figures 1 - 4As shown in the figure, the detachable airbag type well sealing device provided in this embodiment includes a sleeve 1, a sealing cover 2 arranged on the upper part of the sleeve 1, a bottom plate 4 fixed on the lower part of the sleeve 1, and a middle plate 3 located between the sealing cover 2 and the bottom plate 4 and fixed inside the sleeve 1. Well pipe holes 5 are provided on both the middle plate 3 and the bottom plate 4. The well pipe holes 5 are used to sleeved on the well pipe. The diameter of the well pipe hole 5 is slightly larger than the diameter of the well pipe, and it is preferably 3 - 8 mm.

[0035] Further, in this embodiment, as Figures 1 - 4 shown, a drainage chamber 8 is formed between the sealing cover 2, the middle plate 3 and the sleeve 1, which is used to temporarily store the groundwater discharged from the well pipe.

[0036] Further, in this embodiment, as Figures 1 - 4 shown, a grouting hole 6 and a drainage hole 7 are provided on the sealing cover 2. Valves are provided on both the grouting hole 6 and the drainage hole 7. When grouting, the grouting pipe is extended into the wellbore through the grouting hole 6. After starting grouting, the water in the wellbore is discharged out through the drainage hole 7.

[0037] In this embodiment, the grouting hole 6 is provided with a sealing device for the grouting pipe to prevent water from leaking out from the gap between the grouting pipe and the grouting hole 6. In this embodiment, it is preferably to sleeved a conical sealing ring on the grouting pipe, and place the sealing ring in the drainage chamber 8. Under the pressure of the water flushing outwards, the conical sealing ring will be closer and closer to the grouting hole 6.

[0038] Further, in this embodiment, as Figures 1 - 4 shown, a sealing chamber 9 is formed between the bottom plate 4, the middle plate 3 and the sleeve 1. An airbag 10 is provided in the sealing chamber 9. The airbag 10 has no gas inside when not in use, and needs to be inflated to expand when grouting is required.

[0039] Further, in this embodiment, as Figures 1 - 4 shown, the airbag 10 is an annular airbag, including a rubber airbag, etc. The inner diameter of its inner ring in the non-inflated state is larger than the diameter of the well pipe by 3 - 8 mm. In the inflated state, its inner ring diameter is smaller than the well pipe diameter. When the airbag 10 is sleeved on the well pipe and inflated, the airbag 10 fits tightly with the well pipe to play a sealing role and prevent water from flowing out from the gap between the airbag 10 and the well pipe.

[0040] Further, in this embodiment, as Figures 1 - 4 shown, an inflation pipe 11 is connected to the airbag 10, and the inflation pipe is connected to an external inflation device. The structure diagram of the inflation device is not drawn in this embodiment, which is not within the protection scope of this application, as long as it can realize the function of inflating and deflating the airbag 10.

[0041] Further, in this embodiment, as Figures 1 - 4As shown in the figure, there are multiple ways to connect the charging pipe 11 to an external charging device. One way is to provide a charging hole on the side wall of the sealed chamber 9 for the charging pipe 11 to pass through. Another way is to connect the charging pipe 11 to the external charging device through the well pipe hole 5 on the lower side. The third way is to connect the charging pipe 11 to the external charging device through the well pipe hole 5 on the upper side and the drain hole 7 in sequence.

[0042] Furthermore, in this embodiment, as Figures 1 - 4 shown, the sealing cover 2 is detachably connected to the sleeve 1, including snap connection and threaded connection. A sealing treatment, such as an O-ring, is provided at the connection to prevent water from leaking out at the connection.

[0043] The purpose of setting the detachable connection in this embodiment is that after sealing the well, excess concrete may remain in the drainage chamber, causing the entire sleeve to solidify with the wellbore. After removing the sealing cover 2 by using the detachable connection, it is convenient to remove the solidified concrete.

[0044] Another purpose of setting the detachable connection in this embodiment is that if the water volume and water pressure are relatively large, the impact force of the water may wash away the entire sleeve. Therefore, the sleeve 1 needs to be fixed. Before sealing the well, remove the sealing cover 2 and weld several limiting blocks, such as steel bars, on the upper part of the dewatering well pipe. The protruding length of the limiting blocks is greater than the gap between the well pipe hole and the well pipe. When the sleeve 1 is pushed up and washed away by the groundwater, the middle plate 3 will be blocked under the limiting blocks, preventing the middle plate 3 and the sleeve from rising further. After sealing the well, remove the limiting blocks, and then the sleeve can be removed.

[0045] Furthermore, in this embodiment, as Figures 1 - 4 shown, the sleeve 1 is provided with a fixing device for external fixed connection. For example, the sleeve 1 can be locked to a nearby fixed object with a chain, or a protrusion can be welded on the wellbore to lock the sleeve 1 on the protrusion, or a clamp can be added to the sleeve and directly clamped on the well pipe, or lugs can be provided on the sleeve 1 and directly fixed on the foundation pit bottom plate by connecting the lugs with bolts. The purpose of the above various measures is to prevent the sleeve 1 from being washed away due to excessive water volume and water pressure.

[0046] In this embodiment, as Figures 1 - 4As shown in the figure, the working process of the detachable airbag type well sealing device in this embodiment is as follows. Remove the sealing cover 2, place the airbag 10 in the sealing chamber 9, and put the sleeve 1 on the well pipe. At this time, the well pipe penetrates through the two well pipe holes 5 and the annular airbag 10 at the same time. Then seal the sleeve 1 with the sealing cover 2, inflate the airbag 10 through the air charging pipe 11 to make it expand, and then fix the sleeve on the well pipe or on the stable building around it. Then insert the grouting pipe into the well pipe through the grouting hole 6 for grouting (or pouring concrete). The water in the well pipe is forced out and discharged through the drainage chamber 8 and the drainage hole 7 (with a valve on it). After the grouting or the concrete solidifies, deflate the airbag 10, and then remove the sleeve. If the concrete and the grouting liquid solidify in the drainage chamber, it is necessary to remove the sealing cover 2, knock off the solidified matter, and then remove the sleeve.

[0047] In summary, in this embodiment, according to the detachable airbag type well sealing device of this embodiment, the detachable airbag type well sealing device provided in this embodiment uses an airbag to seal the well wall. In the deflated state, the sleeve and the well pipe are convenient to separate, and the sleeve and the seal are detachably connected. If the concrete solidifies in the drainage chamber, the sealing cover can be removed and then the solidified matter can be processed, and the sleeve used for well sealing can be recycled.

[0048] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, all belong to the protection scope of the present invention.

Claims

1. A well sealing method with a recyclable device, characterized in that: The device includes a sleeve (1) sleeved on a well pipe, and an annular bottom plate (4), an annular middle plate (3) and a detachably connected sealing cover (2) sequentially arranged inside the sleeve (1) from bottom to top. An annular airbag (10) is arranged between the bottom plate (4) and the middle plate (3). The well sealing method includes the following steps: Step 1: Place the annular airbag (10) between the bottom plate (4) and the middle plate (3), and then sleeve the annular airbag (10), the bottom plate (4) and the middle plate (3) on the well pipe; Step 2: Cover the sealing cover (2) on the sleeve (1) for sealing, and then fix the sleeve (1) on the well pipe or a stable object nearby; Step 3: Inflate the airbag (10) to make it expand and closely contact with the well pipe; Step 4: Insert a grouting pipe into the well pipe through the grouting hole on the sealing cover (2) for grouting or pouring concrete, and at the same time open the drainage hole on the sealing cover (2) to drain the water in the well pipe; Step 5: After the grouting or pouring is completed, remove the grouting pipe, deflate the airbag (10), and then remove the sleeve (1); Step 6: If the grouting liquid or concrete overflows into the sleeve (1) and solidifies, open the sealing cover (2), remove the solidified matter, and then remove the sleeve (1).

2. A detachable airbag type well sealing device, characterized in that: It includes a sleeve (1), a sealing cover (2) arranged on the upper part of the sleeve (1), a bottom plate (4) fixed on the lower part of the sleeve (1), and a middle plate (3) located between the sealing cover (2) and the bottom plate (4) and fixed inside the sleeve (1). Well pipe holes (5) are provided on both the middle plate (3) and the bottom plate (4). A grouting hole (6) and a drainage hole (7) are provided on the sealing cover (2). A drainage chamber (8) is formed between the sealing cover (2), the middle plate (3) and the sleeve (1). A sealing chamber (9) is formed between the bottom plate (4), the middle plate (3) and the sleeve (1). An airbag (10) is arranged in the sealing chamber (9). Valves are provided on both the grouting hole (6) and the drainage hole (7).

3. The detachable airbag type well sealing device according to claim 2, characterized in that: The airbag (10) is an annular airbag, and an air filling pipe (11) for inflating and deflating is provided on the airbag (10).

4. A detachable airbag type well sealing device according to claim 3, characterized in that: The air filling pipe (11) is connected to an external inflation device, and an inflation hole for the air filling pipe (11) to pass through is provided on the side wall of the sealing chamber (9).

5. The detachable airbag type well sealing device according to claim 3, characterized in that: The air filling pipe (11) is connected to an external inflation device through the lower well pipe hole (5); or the air filling pipe (11) is sequentially connected to an external inflation device through the upper well pipe hole (5) and the drainage hole (7).

6. The detachable airbag type well sealing device according to claim 2, characterized in that: The sealing cover (2) is detachably connected to the sleeve (1), including snap connection and threaded connection.

7. The detachable airbag type well sealing device according to claim 2, characterized in that: The sleeve (1) is provided with a fixing device for external fixed connection, including a chain, a clamp and a bolt.

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