Pumping-inflating dual-purpose drainage well device and construction method

Abstract

The invention discloses an exhausting-inflating dual-purpose drainage well device and a construction method. A floating partition plate capable of moving up and down is arranged in a well pipe body, and the floating partition plate divides an inner cavity of the well pipe body into an inflating area and an exhausting area; the inflating area is communicated with an air inlet pipe for inflating the inflating area, and is provided with a first filtering part which is used for discharging air towards the soil filling area and is provided with a plurality of filtering holes; the air pumping area is communicated with a water pumping exhaust pipe which is used for pumping water in the air pumping area and generating negative pressure, and is provided with a second filtering part which is over against the filter material area and is provided with a plurality of filtering holes. Negative pressure can be formed in an air exhaust area through the water pumping exhaust pipe, the gathering speed of underground water on one side is increased, and the underground water is pumped to the position above the ground through the water pumping exhaust pipe. The inflation area can increase the migration rate of underground water on the other side by pressurizing the underground water, and assists the water pumping area in discharging the underground water above the ground.

Description

Technical Field

[0001] The present invention relates to the technical field of dewatering wells, and specifically, to a pumping and inflating dual-purpose dewatering well device and construction method. Background Art

[0002] In low-permeability formations, the water flow velocity is slow, and the influence radius of pumping wells is limited, making it difficult to effectively lower the groundwater level over a large area. The existing vacuum dewatering wells have a low water output rate: the water extraction volume per unit time is small, and the precipitation speed is slow, making it difficult to quickly achieve the expected effect.

[0003] A circulating inflatable submersible dewatering and precipitation well structure and precipitation method are disclosed in the prior art, with the publication number CN111173015A, including a well pipe, an air inlet pipe, an air extraction pipe, and a water outlet pipe; at least one sealing bag is fixed at the water-stop and sealing section at the upper part of the well pipe, and a grouting pipe extends into the sealing bag; below the sealing bag are a filtering section and a sedimentation pipe section in sequence; the water outlet pipe extends into the well pipe from top to bottom, and its lower end is located in the filtering section; one end of the air inlet pipe extends into the well pipe, and the other end is connected to a pressure air source; one end of the air extraction pipe extends into the well pipe, and the other end is connected to a negative pressure source. The solution of the prior art proposes a precipitation method of inflating and pumping in a cycle, but the pumping and charging cycle efficiency is low, and the inflation is only for assisting pumping, rather than accelerating the migration of groundwater in the soil mass. Summary of the Invention

[0004] The purpose of the present invention is to provide a pumping and inflating dual-purpose dewatering well device and construction method to solve the problems existing in the prior art.

[0005] The purpose of the present invention is achieved as follows: A pumping and inflating dual-purpose dewatering well device includes a well pipe body, and a movable floating partition is arranged inside the well pipe body. The floating partition divides the inner cavity of the well pipe body into an inflation area and an air extraction area, and when the floating partition moves upward, the inflation area and the air extraction area are communicated at the bottom.

[0006] The inflation area is connected with an air inlet pipe for inflating it, and is provided with a first filtering part with a plurality of filter holes for discharging air towards the filling area.

[0007] The air extraction area is connected with a pumping and exhaust pipe that generates negative pressure to extract the water in the air extraction area, and is provided with a second filtering part with a plurality of filter holes facing the filter material area.

[0008] Further, the first filtering part is higher than the second filtering part.

[0009] Further, the floating partition is made of a lightweight material that floats on water.

[0010] Further, a pair of fixed partitions are fixed inside the well pipe body, and the floating partition is arranged to move up and down in the gap between the pair of fixed partitions.

[0011] Furthermore, it further includes an air-filled bag for preventing air pressure from escaping to the ground. The air-filled bag is sleeved outside the well pipe body and is located above the first filtering part. The air-filled bag is in the gap between the well pipe body and the well hole and seals the gap between the well pipe body and the well hole in the inflated state.

[0012] Furthermore, the air-filled bag is connected to the inflation area.

[0013] Furthermore, at the position of the inflation area facing the air-filled bag, there is an air inlet for the bag, and the air-filled bag has an inflation end connected to the air inlet for the bag.

[0014] As another aspect of the present invention, based on the above device, a construction method is proposed:

[0015] Arrange a number of well pipe bodies, and use floating partitions in each well pipe body to divide the inner cavity of the well pipe body into an air extraction area and an inflation area;

[0016] The inflation area of the well pipe body uses the driving force generated by inflation to accelerate the migration of groundwater on one side to the air extraction area. The air extraction area of the well pipe body uses the vacuum negative pressure generated by air extraction to suck the groundwater into the well pipe body and discharge it along the pumping exhaust pipe.

[0017] When the water level in the air extraction area is relatively high, the floating partition floats upward under the action of the buoyancy of the water body, allowing the air extraction area and the inflation area to communicate, and using the atmospheric pressure in the inflation area to drive and accelerate the drainage process in the air extraction area.

[0018] The intake pipe is connected to an external air source component, and the pumping exhaust pipe is connected to a suction device.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. It can use the pumping exhaust pipe to form a negative pressure in the air extraction area, accelerate the rate of groundwater convergence on one side, and pump the groundwater above the ground through the pumping exhaust pipe;

[0021] 2. The inflation area can pressurize the groundwater to accelerate the migration rate of groundwater on the other side and assist the air extraction area to drain the groundwater above the ground;

[0022] 3. It achieves the effect of dual use of one well, can save materials and reduce costs;

[0023] 4. The air-filled bag is arranged in the gap between the well pipe body and the well hole and seals the gap between the well pipe body and the well hole after inflation, preventing the pressure from escaping to the ground. When recovering the air-filled bag, stop inflating, so that the air-filled bag shrinks, facilitating the recovery of the air-filled bag. Description of the Drawings

[0024] Figure 1It is a schematic layout diagram of the present invention from an overlooking perspective.

[0025] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0026] Figure 3 It is a schematic diagram of the relationship between well groups.

[0027] Explanation of reference numerals: 1 - well pipe body; 101 - air inlet hole; 102 - air inlet pipe; 103 - first filter pipe part; 104 - second filter pipe part; 105 - pumping exhaust pipe; 106 - pumping exhaust hole; 107 - inflation area; 108 - air extraction area; 109 - fixed partition board; 110 - air inlet of bladder bag; 111 - solid pipe part; 2 - floating partition board; 3 - inflated bladder bag; 4 - filter material area; 5 - backfill area. Detailed implementation manners

[0028] Next, in combination with the accompanying drawings in the embodiments of the present invention Figures 1-3 , the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1-2 shown, a pumping - inflation dual - purpose dewatering well device is proposed, which includes a well pipe body 1. The well pipe body 1 can be a PVC round pipe. A vertically movable floating partition board 2 is arranged inside the well pipe body 1. The floating partition board 2 divides the inner cavity of the well pipe body 1 into an inflation area 107 and an air extraction area 108. When the floating partition board 2 moves upward, the inflation area 107 and the air extraction area 108 are connected at the bottom.

[0030] The above - mentioned inflation area 107 is connected to an air inlet pipe 102 for inflating it, and is provided with a first filtering part 103 having a number of filter holes for exhausting air towards the backfill area 5. An air inlet hole 101 facing the inflation area 107 is arranged at the upper end of the well pipe body 1. The air inlet end of the air inlet pipe 102 is connected to a high - pressure air source through the air inlet hole 101.

[0031] The above - mentioned air extraction area 108 is connected to a pumping exhaust pipe 105 that pumps out the water in the air extraction area 108 and generates negative pressure, and is provided with a second filtering part 104 having a number of filter holes facing the filter material area 4;

[0032] At the upper end of the well pipe body 1, a pumping exhaust hole 106 facing the air extraction area 108 is arranged. The pumping exhaust pipe 105 is connected to a suction device through the pumping exhaust hole 106. The pumping exhaust pipe 105 is close to the bottom of the well pipe body 1 and close to the second filtering part 104.

[0033] As an embodiment of the structural optimization, the arrangement position of the first filtering part 103 is higher than that of the second filtering part 104.

[0034] The floating partition 2 is made of a light material that floats on water, such as plastic foam, or other light materials that float on water.

[0035] A pair of fixed partitions 109 are fixed inside the well pipe body 1. The fixed partitions 109 are integrally formed with the well pipe body 1. The floating partition 2 is arranged in the gap between a pair of fixed partitions 109 in a vertically movable manner. The fixed partitions 109 can not only limit the position of the floating partition 2 but also guide the direction of the vertical movement of the floating partition 2.

[0036] To ensure the airtight effect, as Figure 2 shown, the device further includes an air-filled balloon bag 3 for preventing air pressure from escaping to the ground. The air-filled balloon bag 3 is set as an annular balloon. The air-filled balloon bag 3 is sleeved outside the well pipe body 1 and is located above the first filtering part 103; the air-filled balloon bag 3 is arranged in the gap between the well pipe body 1 and the well hole and seals the gap between the well pipe body 1 and the well hole after being inflated.

[0037] As Figure 1 shown, the air-filled balloon bag 3 is connected to the inflation area 107. A balloon inlet 110 is provided at the position of the inflation area 107 facing the air-filled balloon bag 3. The air-filled balloon bag 3 has an inflation end connected to the balloon inlet 110. Inflating the air-filled balloon bag 3 can drive it to expand, seal the gap between the well pipe body 1 and the well hole, and prevent the pressure generated by inflation from escaping to the ground; when recovering the air-filled balloon bag 3, stop inflating to make the air-filled balloon bag 3 contract, facilitating the recovery of the air-filled balloon bag 3.

[0038] Based on the above device, a preferred construction method is provided.

[0039] Arrange a group of dewatering well groups, including several well pipe bodies 1. In each well pipe body 1, use the floating partition 2 (preferably a foam board, which can be other floating / movable structures) to divide the inner cavity of the well pipe body 1 into two areas: an air extraction area 108 and an inflation area 107.

[0040] The air inlet pipe 102 is connected to an external air source component, and the water pumping and exhaust pipe 105 is connected to a suction device to form a negative pressure inside the air extraction area 108.

[0041] During use, inflate the inflation area 107 through the air inlet pipe 102. The inflation area 107 of the well pipe body 1 can use the driving force generated by inflation to accelerate the migration of groundwater on one side to the air extraction area 108. At the same time, start the suction device. The air extraction area 108 of the well pipe body 1 uses the vacuum negative pressure generated by air extraction to suck groundwater into the well pipe body 1 and discharge it along the water pumping and exhaust pipe 105.

[0042] When the water level in the air extraction area 108 is relatively high, the floating partition 2 floats upward under the action of buoyancy, enabling the air extraction area 108 and the air inflation area 107 to communicate at the bottom. The atmospheric pressure in the air inflation area 107 can be utilized to drive and accelerate the drainage process in the air extraction area 108.

[0043] Reference Figure 1 It can be found that within the circular area surrounding the well pipe body 1, the area of the filter material area 4 is larger than that of the filling area 5, accounting for two-thirds of the circular area. The filter material area 4 faces the air extraction area 108 inside the well pipe body 1, and the filling area 5 faces the air inflation area 107 inside the well pipe body 1; such a structural configuration can facilitate the collection of groundwater while avoiding the air inflation side from being water-sealed.

[0044] In this solution, the migration of groundwater can be accelerated by increasing the pressure difference on both sides. According to the following Bernoulli equation:

[0045]

[0046] The above-mentioned first filtering part 103 is higher than the second filtering part 104, and the second filtering part 104 is close to the bottom of the well pipe body 1. Such an improvement has the following technical advantages: The function of the second filtering part 104 in the air extraction area 108 is to intake water. The intake position is low, ensuring the effective entry and dewatering of groundwater. The function of the air inflation area 107 is to pressurize. The pressurization position is high, facilitating pressure diffusion through the first filtering part 103. It can be equivalently regarded as a depression funnel, with air inflation at the top of the funnel and water pumping at the bottom of the funnel. As Figure 3 shown, the relationship between the well groups can be understood.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense. For example, it can be fixedly connected, or detachably connected, or integrally formed, or mechanically connected, or indirectly connected through an intermediate connecting component. The specific meaning of the terms in this utility model can be understood according to specific circumstances.

[0048] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0049] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-purpose pumping and inflating dewatering well device, comprising a well pipe body (1), characterized in that, A floating partition (2) that can move up and down is provided inside the well pipe body (1). The floating partition (2) divides the inner cavity of the well pipe body (1) into an air inflation area (107) and an air extraction area (108). When the floating partition (2) moves upward, the air inflation area (107) and the air extraction area (108) are connected at the bottom. The air inflation area (107) is connected to an air inlet pipe (102) for inflating it, and is provided with a first filtering part (103) having a number of filter holes for discharging air towards the filling area (5). The air extraction area (108) is connected to a water extraction exhaust pipe (105) that generates negative pressure to extract the water in the air extraction area (108), and is provided with a second filtering part (104) having a number of filter holes facing the filter material area (4).

2. The air extraction and inflation dual-purpose dewatering well device according to claim 1, characterized in that, The first filtering part (103) is higher than the second filtering part (104).

3. The draw - inflation dual - purpose dewatering well device according to claim 1, characterized in that, The floating partition (2) is made of a light material that floats on water.

4. A pumping and inflating dual-purpose dewatering well device according to claim 3, characterized in that, A pair of fixed partitions (109) are fixed inside the well pipe body (1), and the floating partition (2) is arranged to move up and down in the gap between the pair of fixed partitions (109).

5. The draw - inflation dual - purpose dewatering well device according to claim 2, characterized in that, It further includes an air inflation bag (3) for preventing air pressure from escaping to the ground. The air inflation bag (3) is sleeved outside the well pipe body (1) and is located above the first filtering part (103). The air inflation bag (3) is in the gap between the well pipe body (1) and the well hole, and seals the gap between the well pipe body (1) and the well hole in the inflated state.

6. The air extraction and inflation dual-purpose dewatering well device according to claim 5, characterized in that, The air inflation bag (3) is connected to the air inflation area (107).

7. The air extraction and inflation dual-purpose dewatering well device according to claim 6, characterized in that, At the position of the air inflation area (107) facing the air inflation bag (3), there is a bag inlet (110), and the air inflation bag (3) has an inflation end connected to the bag inlet (110).

8. A construction method using the pumping and air-injecting dual-purpose dewatering well device according to claim 1, characterized in that, A number of well pipe bodies (1) are arranged, and the inner cavity of each well pipe body (1) is divided into an air extraction area (108) and an air inflation area (107) by using the floating partition (2). The air inflation area (107) of the well pipe body (1) uses the driving force generated by inflation to accelerate the migration of groundwater on one side into the air extraction area (108). The air extraction area (108) of the well pipe body (1) uses the vacuum negative pressure generated by air extraction to suck the groundwater into the well pipe body (1) and discharge it along the water extraction exhaust pipe (105).

9. A construction method according to claim 8, characterized in that, When the water level in the air extraction area (108) is relatively high, the floating partition (2) floats upward under the buoyancy of the water body, allowing the air extraction area (108) and the air inflation area (107) to communicate, and using the atmospheric pressure in the air inflation area (107) to drive and accelerate the drainage process in the air extraction area (108).

10. A construction method according to claim 8, characterized in that, The air inlet pipe (102) is connected to an external air source component, and the water extraction exhaust pipe (105) is connected to a suction device.

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