Vacuum dewatering well structure capable of preventing silt blockage

Abstract

The utility model provides a vacuum dewatering well structure capable of preventing silt blockage. Outer water inlet holes are formed in the pipe wall, close to the bottom, of an outer well pipe in an array mode. The inner well pipe is arranged in the middle of the outer well pipe, the lower end of the inner well pipe extends to the position near the bottom of the outer well pipe, and inner water inlet holes are formed in the pipe wall near the bottom of the inner well pipe in an array mode. The sealing ring plug is detachably arranged at the tops of the outer well pipe and the inner well pipe, and a seal is formed at the top of an annular space of the outer well pipe and the inner well pipe; the sealing plate is detachably arranged on the top of the inner well pipe, and sealing is formed on the top of the inner space of the inner well pipe. The water pumping unit comprises a water pump and a water pumping pipe, the water pumping pipe is hermetically connected to the sealing plate, the upper end is connected with the water pump, and the lower end extends near the bottom of the inner well casing; an exhaust pipe of the vacuumizing unit is connected to the sealing plate in a sealed mode, the upper end is connected with an exhaust pump, and the lower end extends into the inner well pipe. Soil particles are filtered in multiple layers, the water pumping rate of the vacuum dewatering well is increased, and assembling, disassembling and cleaning are convenient.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit dewatering construction technology, and in particular to a vacuum dewatering well structure that prevents silt blockage. Background Technology

[0002] Vacuum dewatering well pipes use a vacuum pump to extract air from the well pipe to create a negative pressure vacuum. This vacuum creates a pressure difference around the well pipe, which causes water to flow into the well pipe and reduces the moisture content of the surrounding soil. However, during the process of extracting groundwater, some small particles of silt are carried by the groundwater and deposited around the filter pipe, causing blockage, reducing dewatering efficiency, and increasing the complexity of construction.

[0003] The existing vacuum dewatering well structure uses iron sheets to rigidly connect the inner and outer well pipes, making disassembly difficult, preventing thorough cleaning of the inner pipe, and eliminating the need for a sedimentation section in the outer well pipe. This causes soil particles that settle inside the pipe to accumulate at the inlet of the outer well pipe, easily leading to blockages. Utility Model Content

[0004] Based on this, the present invention provides a vacuum dewatering well structure that prevents silt blockage, so as to achieve multi-layer filtration of soil particles, improve the pumping rate of the vacuum dewatering well, and facilitate assembly, disassembly and cleaning.

[0005] To achieve the above objectives, the technical solution of this utility model is a vacuum dewatering well structure for preventing silt blockage, comprising: an outer well pipe, vertically buried in an aquifer, with an array of external water inlets on the pipe wall near the bottom; an inner well pipe, centrally located inside the outer well pipe, extending to the vicinity of the bottom of the outer well pipe, with an array of internal water inlets on the pipe wall near the bottom; and a sealing ring plug, detachably disposed at the top of the outer and inner well pipes, and positioned between the outer and inner well pipes. The annular space of the well casing forms a seal at the top; a sealing plate, detachably disposed at the top of the inner well casing, forms a seal at the top of the internal space of the inner well casing; a pumping unit, including a pumping pump and a pumping pipe, the pumping pipe being sealed to the sealing plate, with its upper end connected to the pumping pump and its lower end extending into the vicinity of the bottom of the inner well casing; and a vacuum unit, including a vacuum pump and an air extraction pipe, the air extraction pipe being sealed to the sealing plate, its upper end connected to the air extraction pump and its lower end extending into the inner well casing.

[0006] Furthermore, a sand-sinking tailpipe is provided at the bottom of the outer well pipe, and the bottom of the sand-sinking tailpipe is a closed shell structure.

[0007] Furthermore, the bottom of the inner well pipe is provided with a perforated bottom plate, which is a downwardly protruding arc-shaped shell structure. The bottom through holes are arranged in an array on the arc-shaped shell structure. The perforated bottom plate and the sedimentation tail pipe are arranged vertically and vertically to form a sedimentation space.

[0008] Furthermore, the diameter of the outer water inlet is larger than the diameter of the inner water inlet, and / or the height of the outer water inlet is lower than the height of the inner water inlet.

[0009] Furthermore, the outer well pipe is surrounded by an outer filter structure outside the outer water inlet, and the inner well pipe is surrounded by an inner filter structure outside the outer water inlet. The pore size of the outer filter structure is larger than that of the inner filter structure.

[0010] Furthermore, the inner ring of the sealing ring plug is connected to the outer surface of the inner well pipe through a first threaded pair, and the outer ring of the sealing ring plug is connected to the inner surface of the outer well pipe through a second threaded pair. The first threaded pair and the second threaded pair have the same direction of rotation and pitch.

[0011] Furthermore, a sealing ring plate is provided at the bottom of the sealing ring plug, and the sealing ring plate is supported and tightened at the bottom of the sealing ring plug by a retaining ring.

[0012] Furthermore, at least two levers are evenly distributed along the circumference on the top surface of the sealing ring plug, and each lever is arranged vertically with its upper end extending above the top of the outer well pipe and the inner well pipe.

[0013] Furthermore, the vacuum pumping unit also includes a vacuum monitoring meter and a vacuum monitoring tube. The vacuum monitoring tube is sealed and connected to a sealing plate. The upper end of the vacuum pumping tube is connected to the vacuum monitoring meter, and the lower end extends into the inner wellbore.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The system uses both outer and inner pipes to filter sediment. The filter holes in the outer pipe are larger than those in the inner pipe, which facilitates the flow of water into the vacuum dewatering well and improves the construction efficiency of the dewatering well. In addition, there is a sedimentation pipe at the bottom of the filter holes in the outer pipe to collect the sediment and prevent it from clogging.

[0016] 2. The first threaded pair of the sealing ring plug connects to the inner well pipe, and the second threaded pair connects to the outer well pipe. The structure is simple and easy to disassemble and clean.

[0017] 3. A sealing ring plate is installed at the bottom of the sealing ring plug to achieve double sealing, which can reduce the vacuum loss of the vacuum dewatering well, improve the dewatering efficiency, and monitor the vacuum level in real time through a vacuum monitoring meter to carry out a reasonable pumping operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of an embodiment of a vacuum dewatering well designed to prevent silt blockage.

[0020] Figure 2 A schematic diagram of the provided sealing ring plug;

[0021] Figure 3 This is a structural schematic diagram of the upper part of the provided external well casing;

[0022] Figure 4 This is a schematic diagram of the upper part of the provided inner well casing.

[0023] Explanation of reference numerals in the attached diagram:

[0024] 1-Outer well casing, 101-Outer water inlet, 102-Outer filter structure, 103-Sediment settling tailpipe;

[0025] 2-Inner well casing, 201-Inner water inlet hole, 202-Inner filter structure, 203-Perforated bottom plate;

[0026] 31-Sealing ring plug, 32-Sealing plate, 301-Lever, 302-Snap ring, 303-Sealing ring plate;

[0027] 4-Water pump pipe;

[0028] 5-Vacuum tube;

[0029] 6-Vacuum monitoring gauge; 601-Vacuum monitoring tube.

[0030] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figures 1 to 4 As shown, a vacuum dewatering well structure for preventing silt blockage includes an outer well pipe 1, an inner well pipe 2, a sealing ring plug 31, a sealing plate 32, a pumping unit, and a vacuum pumping unit. The outer well pipe 1 is vertically buried within the aquifer, and external water inlets 101 are arrayed on the pipe wall near the bottom of the outer well pipe 1. The inner well pipe 2 is centrally located inside the outer well pipe 1, extending its lower end to near the bottom of the outer well pipe 1. Internal water inlets 201 are arrayed on the pipe wall near the bottom of the inner well pipe 2. The sealing ring plug 31 is detachably mounted on the top of the outer well pipe 1 and the inner well pipe 2, forming a seal at the top of the annular space between the outer well pipe 1 and the inner well pipe 2. Plate 32 is detachably mounted on the top of the inner well pipe 2, forming a seal at the top of the internal space of the inner well pipe 2; the water pumping unit includes a water pump and a water pumping pipe 4, the water pumping pipe 4 is sealed to the sealing plate 32, and its upper end is connected to the water pump and its lower end extends into the vicinity of the bottom of the inner well pipe 2; and the vacuum pumping unit includes a vacuum pump and an air pumping pipe, the air pumping pipe is sealed to the sealing plate 32, its upper end is connected to the air pump and its lower end extends into the inner well pipe 2.

[0033] During implementation, a sedimentation tailpipe 103 is installed at the bottom of the outer well pipe 1, and the bottom of the sedimentation tailpipe 103 is a closed shell structure. A perforated bottom plate 203 is installed at the bottom of the inner well pipe 2. The perforated bottom plate 203 is a downwardly convex arc-shaped shell structure, and an array of bottom through holes is arranged on the arc-shaped shell structure. The perforated bottom plate 203 and the sedimentation tailpipe 103 are arranged vertically and vertically to form a sedimentation space, so as to realize the collection of sediment and avoid sediment from burying the outer water inlet 101 and the inner water inlet 201.

[0034] The diameter of the outer water inlet 101 is larger than the diameter of the inner water inlet 201, and / or the height of the outer water inlet 101 is lower than the height of the inner water inlet 201. Specifically, the outer well pipe 1 is surrounded by an outer filter structure 102 outside the outer water inlet 101, and the inner well pipe 2 is surrounded by an inner filter structure 202 outside the outer water inlet 101. The pore size of the outer filter structure 102 is larger than that of the inner filter structure 202. Through the above structure, the outer well pipe 1 and the inner well pipe 2 provide dual filtration of sediment. The filter holes of the outer well pipe 1 are larger than those of the inner pipe, which facilitates the flow of water into the vacuum dewatering well, improving the construction efficiency of the dewatering well. Furthermore, there is a sedimentation pipe at the bottom of the filter holes of the outer well pipe to collect the settled sediment and prevent clogging.

[0035] In some embodiments, the inner ring of the sealing ring plug 31 is connected to the outer surface of the inner well pipe 2 via a first threaded connection, and the outer ring of the sealing ring plug 31 is connected to the inner surface of the outer well pipe 1 via a second threaded connection. The first and second threaded connections have the same direction of rotation and pitch. Furthermore, at least two levers 301 are evenly distributed along the circumference of the top surface of the sealing ring plug. Each lever 301 is arranged vertically and its upper end extends above the top of both the outer and inner well pipes. Two levers 301 are welded to the diameter of the top surface of the sealing ring plug 31 for easy rotational connection.

[0036] A sealing ring 303 is provided at the bottom of the sealing ring plug 31. The sealing ring 303 is supported and secured to the bottom of the sealing ring plug 31 by a retaining ring 302. In addition, a sealing ring plate is provided at the bottom of the sealing ring plug, realizing double sealing, which can reduce the vacuum loss of the vacuum dewatering well, improve the dewatering efficiency, and monitor the vacuum degree in real time through a vacuum monitoring meter to carry out a reasonable pumping operation.

[0037] The sealing device includes a threaded sealing ring and a sealing ring 303 supported by a retaining ring 302, which enhances the sealing performance of the vacuum dewatering pipe and reduces vacuum loss. The retaining ring 302 is located under the threads on the inner wall of the outer well pipe 1, and under the threads on the inner and outer walls of the inner pipe 2, to support the sealing structure of the inner and outer well pipes. When installing the pipe structure, first connect the sealing ring plug 31 and the inner pipe threaded sealing ring to the inner pipe 2, then place the sealing ring plate 303 on the outer well pipe retaining ring 302, and then connect the sealing ring plug 31, the inner pipe threaded sealing ring, the inner well pipe 2, the outer well pipe threaded sealing ring to the outer well pipe 1 with the rotational force of the lever 301.

[0038] The lowest end of the inner pipe is not a perforated structure but has an arc-shaped base plate 203. The opening of the arc-shaped base plate 203 serves as the water inlet for the inner pipe section. The lowest end of the outer well pipe has a sedimentation pipe 103. The outer layer filter structure 102 has a coarser filter media, while the inner layer filter structure 202 has a finer filter media, facilitating faster water flow into the well pipe and preventing silt blockage. Furthermore, the silt carried by the groundwater flowing into the outer well pipe 1 will be deposited in the sedimentation pipe 103, preventing blockage of the water inlet. In the event of blockage in the vacuum well, the inner and outer well pipes can be disassembled for cleaning.

[0039] The vacuum pumping unit also includes a vacuum monitoring gauge 6 and a vacuum monitoring tube 601. The vacuum monitoring tube 601 is sealed to the sealing plate 32. The upper end of the vacuum pumping tube 5 is connected to the vacuum monitoring gauge 6, and the lower end extends into the inner wellbore. In a specific implementation, the vacuum monitoring tube 601 is connected to the vacuum monitoring gauge 6, which can observe the vacuum level inside the well and monitor for leaks and blockages.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vacuum dewatering well structure to prevent silt blockage, characterized in that, include: An external well pipe (1) is vertically buried in an aquifer, and an array of external water inlets (101) are arranged on the pipe wall near the bottom of the external well pipe (1). The inner well pipe (2) is centrally located inside the outer well pipe (1), with its lower end extending to the vicinity of the bottom of the outer well pipe (1). The inner well pipe (2) has an array of internal water inlet holes (201) arranged on the pipe wall near the bottom. A sealing ring plug (31) is detachably disposed at the top of the outer well pipe (1) and the inner well pipe (2) to form a seal at the top of the annular space between the outer well pipe (1) and the inner well pipe (2); A sealing plate (32) is detachably disposed on the top of the inner well pipe (2) to form a seal at the top of the internal space of the inner well pipe (2); The pumping unit includes a pump and a pumping pipe (4), the pumping pipe (4) being sealed to the sealing plate (32), with its upper end connected to the pump and its lower end extending into the vicinity of the bottom of the inner well pipe (2); and The vacuum unit includes a vacuum pump and a suction pipe. The suction pipe is sealed to the sealing plate (32), with its upper end connected to the suction pump and its lower end extending into the inner well pipe (2).

2. The vacuum dewatering well structure for preventing silt blockage according to claim 1, characterized in that, The bottom of the outer well pipe (1) is provided with a sand settling tail pipe (103), and the bottom of the sand settling tail pipe (103) is a closed shell structure.

3. The vacuum dewatering well structure for preventing silt blockage according to claim 2, characterized in that, The bottom of the inner well pipe (2) is provided with a perforated bottom plate (203). The perforated bottom plate (203) has a downwardly protruding arc-shaped shell structure. The bottom through holes are arranged in an array on the arc-shaped shell structure. The perforated bottom plate (203) and the sedimentation tail pipe (103) are arranged vertically and vertically to form a sedimentation space.

4. The vacuum dewatering well structure for preventing silt blockage according to claim 1, characterized in that, The diameter of the outer water inlet (101) is larger than the diameter of the inner water inlet (201), and / or the height of the outer water inlet (101) is lower than the height of the inner water inlet (201).

5. The vacuum dewatering well structure for preventing silt blockage according to claim 4, characterized in that, The outer well pipe (1) is surrounded by an outer filter structure (102) outside the outer water inlet (101), and the inner well pipe (2) is surrounded by an inner filter structure (202) outside the outer water inlet (101). The pore size of the outer filter structure (102) is larger than that of the inner filter structure (202).

6. The vacuum dewatering well structure for preventing silt blockage according to claim 1, characterized in that, The inner ring of the sealing ring plug (31) is connected to the outer surface of the inner well pipe (2) through a first threaded pair, and the outer ring of the sealing ring plug (31) is connected to the inner surface of the outer well pipe (1) through a second threaded pair. The first threaded pair and the second threaded pair have the same direction of rotation and pitch.

7. The vacuum dewatering well structure for preventing silt blockage according to claim 6, characterized in that, The bottom of the sealing ring plug (31) is provided with a sealing ring plate (303), and the sealing ring plate (303) is supported and tightened to the bottom of the sealing ring plug (31) by a retaining ring (302).

8. The vacuum dewatering well structure for preventing silt blockage according to claim 6 or 7, characterized in that, At least two levers (301) are evenly distributed along the circumference on the top surface of the sealing ring plug (31). Each lever (301) is arranged vertically and its upper end extends above the top of the outer well pipe (1) and the inner well pipe (2).

9. The vacuum dewatering well structure for preventing silt blockage according to claim 1, characterized in that, The vacuum pumping unit also includes a vacuum monitoring meter (6) and a vacuum monitoring tube (601). The vacuum monitoring tube (601) is sealed and connected to the sealing plate (32). The upper end of the vacuum pumping tube (5) is connected to the vacuum monitoring meter (6), and the lower end extends into the inner well barrel.

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