A precipitation well pipe lowering auxiliary device

Abstract

This utility model relates to the field of dewatering well pipe installation technology, and in particular to a dewatering well pipe lowering auxiliary device, including a dewatering well pipe, a centralizer provided on the outside of the dewatering well pipe, the centralizer including fasteners and a support frame, the support frame being arch-shaped, the upper and lower ends of the support frame abutting against the outer wall of the dewatering well pipe, the middle of the support frame being bent and protruding, and the two ends of the support frame having slots adapted to the fasteners; multiple sets of support frames are provided, arranged in a circular array on the outside of the dewatering well pipe, the ends of the support frames being located between the outer wall of the dewatering well pipe and the fasteners, the fasteners clamping the support frames to the outside of the dewatering well pipe; this utility model, by setting multiple centralizers, positions the dewatering well pipe, ensuring that the well pipe is in the center of the well hole, and at the same time, during lowering, the size of the support frame is adjusted according to the actual situation of the well hole, and is tightened and fixed by the fasteners, reliably ensuring the verticality of the well pipe during lowering.

Description

Technical Field

[0001] This utility model relates to the field of dewatering well pipe installation technology, and in particular to an auxiliary device for lowering dewatering well pipes. Background Technology

[0002] Lowering the dewatering well casing is a crucial step in foundation pit dewatering projects, and its construction quality directly affects the dewatering effect and project safety. Generally, the borehole diameter of the dewatering well is larger than the designed well casing outer diameter. During the lowering process, it is necessary to ensure that the well casing is centered in the borehole and that the verticality of the casing meets the design requirements. In existing technologies, small-scale adjustments are usually made manually, which is inefficient. Large-scale adjustments use auxiliary devices, but these devices have complex structures, high investment costs, and are inconvenient to use. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an auxiliary device for lowering dewatering well pipes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dewatering well pipe lowering auxiliary device includes a dewatering well pipe, a centralizer provided on the outside of the dewatering well pipe, the centralizer including fasteners and a support frame, the support frame being arched, the upper and lower ends of the support frame abutting against the outer wall of the dewatering well pipe, the middle of the support frame being bent and protruding, and the two ends of the support frame being provided with slots adapted to the fasteners; multiple sets of support frames are provided and arranged in a circular array on the outside of the dewatering well pipe, the ends of the support frames being located between the outer wall of the dewatering well pipe and the fasteners, the fasteners clamping the support frames to the outside of the dewatering well pipe.

[0006] Preferably, the fastener is a hose clamp or binding wire, and the fastener is provided in two sets, which are respectively set in the slots at both ends of the support frame.

[0007] Preferably, the support frame has a guide ring on the inner side of the middle part, and a reinforcing wire passes through the guide ring and surrounds the straightener.

[0008] Preferably, the support frame includes a fixed section and a straightening section. The straightening section is located at the central protrusion of the support frame. A bending groove is provided between the fixed section and the straightening section, and the fixed section and the straightening section bend along the bending groove.

[0009] Preferably, the outer side of the straightening section is provided with an adjusting shim, and the inner side of the adjusting shim is provided with a connecting ring.

[0010] Preferably, the two ends of the support frame are provided with a frosted anti-slip surface at the contact points with the dewatering well pipe.

[0011] The beneficial effects of this utility model are as follows:

[0012] Compared with the prior art, this utility model sets up multiple stabilizers to position the dewatering well pipe and ensure that the well pipe is in the center of the well hole. At the same time, the size of the support frame is adjusted according to the actual situation of the well hole during the lowering process, and the pipe is fixed by fasteners, which reliably ensures the verticality of the well pipe during lowering. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of an auxiliary device for lowering dewatering well pipes proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of an auxiliary device for lowering a dewatering well pipe according to the present invention;

[0015] Figure 3 This is a top sectional view of an embodiment of the construction status adjustment of a dewatering well pipe lowering auxiliary device proposed in this utility model.

[0016] In the diagram: 1. Dewatering well pipe; 2. Hose clamp; 3. Support frame; 301. Fixed section; 302. Straightening section; 303. Bending groove; 31. Guide ring; 32. Slot; 4. Reinforcing tie wire; 5. Adjusting shim; 6. Connecting ring. Detailed Implementation

[0017] 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.

[0018] Reference Figure 1-2 A dewatering well pipe lowering auxiliary device includes a dewatering well pipe 1. A straightener is provided on the outside of the dewatering well pipe 1. There are generally at least two straighteners, which are respectively located at the upper and lower ends of the dewatering well pipe 1 to ensure that the verticality of the dewatering well pipe 1 meets the design requirements. The straightener includes fasteners and support frames 3. The fasteners are generally hose clamps 2 or binding wires, which are selected according to cost and construction requirements. There are multiple sets of support frames 3, which are arranged in a ring array on the outside of the dewatering well pipe 1. The end of the support frame 3 is located between the outer wall of the dewatering well pipe 1 and the fasteners. The support frame 3 is clamped to the outside of the dewatering well pipe 1 by the fasteners to achieve quick installation and disassembly.

[0019] The support frame 3 is in the shape of an arch bridge. The upper and lower ends of the support frame 3 abut against the outer wall of the dewatering well pipe 1. The two ends of the support frame 3 are provided with a frosted anti-slip surface at the contact points with the dewatering well pipe 1. The support frame 3 is bent and protruded in the middle. The protrusion is about 10cm high to ensure that the dewatering well pipe 1 is in the center of the well hole during the process of lowering the dewatering well pipe 1.

[0020] The support frame 3 has slots 32 at both ends that are compatible with fasteners. The slots 32 are adapted to hose clamps 2 or binding wires. There are two sets of fasteners, which are respectively set in the slots 32 at both ends of the support frame 3 to stably fix the support frame 3 to the outside of the dewatering well pipe 1.

[0021] The support frame 3 includes a fixed section 301 and a straightening section 302. The straightening section 302 is located at the protrusion in the middle of the support frame 3. A bending groove 303 is provided between the fixed section 301 and the straightening section 302. The fixed section 301 and the straightening section 302 bend along the bending groove 303.

[0022] The diameter of the well holes dug for dewatering is generally 450mm to 525mm, and the diameter of the well pipe is generally 273mm or 325mm. Therefore, adjustments are required during actual construction.

[0023] The support frame 3 is made of metal plate with a certain degree of elasticity, and it can also be bent to undergo plastic deformation. When adjusting, the fixed section 301 and the straightening section 302 are directly bent to adjust the height of the protrusion in the middle of the support frame 3, thereby meeting the size of the gap between the dewatering well pipe 1 and the well hole, and stably realizing the straightening function.

[0024] like Figure 3 As shown in the embodiment of adjusting the construction status accordingly, the support frame 3 is provided with a guide ring 31 on the inner side of the middle part, and a reinforcing tie wire 4 passes through the guide ring 31. The reinforcing tie wire 4 is arranged around the centralizer. The adjusted support frame 3 is tightened by the shrinking of the reinforcing tie wire 4, which reduces the outer contour of the centralizer and adapts to a smaller wellbore.

[0025] During the lowering process of the dewatering well pipe 1, the well hole will be damaged, affecting the subsequent verticality. Therefore, an adjusting shim 5 is provided on the outside of the straightening section 302, and a connecting ring 6 is provided on the inside of the adjusting shim 5. The binding wire passes through the connecting ring 6 and the guide ring 31 to fix the adjusting shim 5 on the outside of the straightening section 302, adapting to the well hole size, making up for the adjustment, and ensuring that the upper and lower ends of the dewatering well pipe 1 are in the center position of the well hole.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

Claims

1. A dewatering well pipe lowering aid device comprising a dewatering well pipe (1), characterized in that, The outside of the dewatering well pipe (1) is provided with a straightener. The straightener includes fasteners and a support frame (3). The support frame (3) is in the shape of an arch bridge. The upper and lower ends of the support frame (3) abut against the outer wall of the dewatering well pipe (1). The middle part of the support frame (3) is bent and protruded. The two ends of the support frame (3) are provided with slots (32) that are compatible with the fasteners. The support frame (3) is provided in multiple sets and arranged in a ring array on the outside of the dewatering well pipe (1). The end of the support frame (3) is located between the outer wall of the dewatering well pipe (1) and the fastener. The fastener clamps the support frame (3) to the outside of the dewatering well pipe (1).

2. A precipitation well pipe lowering assist device according to claim 1, characterized in that, The fastener is a hose clamp (2) or binding wire. The fastener is provided in two sets, which are respectively set in the slots (32) at both ends of the support frame (3).

3. A precipitation well pipe lowering assist device according to claim 1, characterized in that, The support frame (3) has a guide ring (31) on the inner side of the middle, and a reinforcing wire (4) runs through the guide ring (31) and surrounds the straightener.

4. The device of claim 1, wherein, The support frame (3) includes a fixed section (301) and a straightening section (302). The straightening section (302) is located at the protrusion in the middle of the support frame (3). A bending groove (303) is provided between the fixed section (301) and the straightening section (302). The fixed section (301) and the straightening section (302) bend along the bending groove (303).

5. A precipitation well pipe lowering assist device according to claim 4, characterised in that, An adjusting shim (5) is provided on the outer side of the straightening section (302), and a connecting ring (6) is provided on the inner side of the adjusting shim (5).

6. A precipitation well pipe lowering assist device according to claim 1, wherein, The support frame (3) has a frosted anti-slip surface at both ends where it contacts the dewatering well pipe (1).

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