Pipe descending auxiliary device of ground source heat pump pipe

Abstract

The utility model belongs to the technical field of geothermal energy application, and particularly relates to a pipe descending auxiliary device of a ground source heat pump pipe, which can effectively ensure the stability of a guide pipe and is simple in arrangement mode as long as the guide pipe is coaxially arranged in a drilling well and a positioning flange is attached to the upper end face of a well mouth of the drilling well. In addition, the pump pipe is lowered into the well through the anti-abrasion roller, the anti-abrasion roller can rotate around the axis of the anti-abrasion roller, friction to the anti-abrasion roller is effectively reduced, lowering of the pump pipe is facilitated, the pipe lowering speed is increased, and friction between the pump pipe and the well mouth of the well can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of geothermal energy application, and in particular relates to a pipe lowering auxiliary device for a ground source heat pump pipe. Background Art

[0002] A ground-source heat pump is a device that transfers low-grade thermal energy to high-grade thermal energy from shallow land resources by inputting a small amount of high-grade energy (such as electricity). Typically, a ground-source heat pump consumes 1kWh of energy, and users can obtain more than 4kWh of heat or cooling. Because ground-source heat pump systems are highly efficient, energy-saving, and environmentally friendly, ground-source heat pump air conditioners save about 30% more energy than ordinary central air conditioners for cooling in the summer; and ground-source heat pump floor heating saves about 40% more energy than gas boiler floor heating for heating in the winter. Ground-source heat pump air conditioners and floor heating do not require boilers, and there is no exhaust gas, waste residue, or wastewater discharged, which is beneficial to environmental protection. Therefore, they are widely used in various fields such as building heating, production and breeding.

[0003] A geothermal heat pump is a central heating and air-conditioning system that uses rock, soil, groundwater, or surface water as a low-temperature heat source. It consists of a water-based geothermal heat pump unit, a geothermal energy exchange system, and a building system. Depending on the type of geothermal energy exchange system, geothermal heat pump systems are divided into buried pipe geothermal heat pump systems, groundwater geothermal heat pump systems, and surface water geothermal heat pump systems. During the installation of buried pipe and groundwater geothermal heat pump systems, the pump pipe needs to be placed into a drilled geothermal well. Currently, most pipe placement devices on the market lack protective measures at the wellhead during pipe placement, resulting in friction between the outer wall of the pump pipe and the wellhead, causing damage to the pump pipe and shortening its service life.

[0004] Chinese patent document CN202121269486.0 (CN215159930U) discloses a ground source heat pump pipe downpipe device. Although the above-mentioned ground source heat pump pipe downpipe device can effectively protect the pump pipe, it is necessary to first place the base plate in the appropriate position during use, then adjust the bottom foot to make the base plate stable to avoid shaking, then pull the fixed plate so that the fixed plate drives the sliding block to slide along the sliding hole, and then move the sleeve to the top of the wellhead, then remove the limit block from the limit groove, and then move the connecting column downward, thereby driving the bottom fixed block and sleeve downward, and then the fixed plate is fixed to the top of the wellhead while the sleeve falls into the well, and it is also necessary to adjust the sleeve by the rotating rod according to the angle of the wellhead so that the sleeve and the well wall are parallel to each other, so as to avoid direct contact between the pump pipe and the wellhead. The entire downpipe device operation process is complicated, and although the fixing ring has no corners, the friction between it and the pump pipe is still very large. Utility Model Content

[0005] In order to overcome the defects of the prior art, the utility model provides a pipe lowering auxiliary device for a ground source heat pump pipe.

[0006] The technical problem to be solved by the utility model is solved by the following technical scheme: a downpipe auxiliary device of a ground source heat pump pipe, including hollow guide pipe and anti-abrasion roller, the guide pipe upper end is provided with positioning flange, the anti-abrasion roller is horizontally arranged above the positioning flange, the anti-abrasion roller can rotate around its own axis,

[0007] The inner diameter of the guide pipe is less than or equal to the inner diameter of the drill hole.

[0008] The utility model discloses the downpipe auxiliary device only needs to arrange the guide pipe coaxially in the drill hole, and the positioning flange is attached to the upper end surface of the drill hole mouth, so that the stability of the guide pipe can be effectively ensured, and the arrangement mode is simple.

[0009] In addition, the pump pipe is lowered into the drill hole through the anti-abrasion roller, the anti-abrasion roller can rotate around its own axis, the friction on the anti-abrasion roller is effectively reduced, the lowering of the pump pipe is facilitated, the downpipe speed is improved, and the pump pipe and the drill hole mouth are prevented from being rubbed.

[0010] The utility model discloses the technical scheme still further: still include pipeline position adjusting mechanism, the pipeline position adjusting mechanism includes guide support plate, the slide that can slideably be arranged in the guide support plate in the slide and fixed bolt,

[0011] The guide support plate is fixedly arranged above the positioning flange in parallel with the longitudinal section of the guide pipe, the anti-abrasion roller is rotatably arranged on the slide, the side wall of the guide support plate is provided with a guide slide, the slide is provided with a threaded hole, and the fixed bolt is screw-connected with the threaded hole through the guide slide. Since the diameters of different pump pipes are different, the position of the pump pipe in the guide pipe and the angle of the pump pipe lowered into the drill hole can be adjusted through the pipeline position adjusting mechanism, so that the pump pipe and the upper end edge of the guide pipe are prevented from being rubbed. The position of the slide is adjusted along the radial direction of the guide pipe, so that the pump pipe can be vertically lowered into the guide pipe through the anti-abrasion roller, the slide and the guide support plate are relatively fixed together through the screw thread cooperation of the fixed bolt and the slide, and the anti-abrasion roller is prevented from being moved to affect the downpipe operation when the pump pipe is lowered.

[0012] The utility model discloses the technical scheme still further: still include ball, the guide pipe inner wall is provided with the ball of multiple turns spherical from top to bottom inlaying, the ball rotatable setting in the guide pipe, the ball protrudes in the guide pipe inner wall setting. Inlaying the ball in the guide pipe inner wall avoids that the pump pipe above is directly contacted with the guide pipe inner wall and is worn when downpipe, and the free rolling of the ball can effectively protect the outer wall of the pump pipe.

[0013] The utility model discloses the technical scheme still further: the ball is evenly distributed along the circumference of the guide pipe. The ball is arranged evenly along the circumference of the guide pipe, so that the pump pipe and the ball can be uniformly stressed when being contacted.

[0014] The utility model discloses a technical scheme still has: the guide pipe includes the guide pipe body and the ball retainer of coaxial arrangement, the ball retainer sets up in the guide pipe body, the recessed groove that is matched with the ball is provided on the guide pipe body inner wall, the limiting hole that is matched with the ball is provided on the ball retainer, the ball rotatable setting is between recessed groove and limiting hole.

[0015] The recessed groove that is matched with the ball is provided on the guide pipe body inner wall, the limiting hole that is matched with the ball is provided on the ball retainer, the ball rotatable setting is between recessed groove and limiting hole. Utilize the position of ball of coaxial arrangement's guide pipe body and ball retainer to limit, simple structure, convenient assembly.

[0016] The utility model discloses a technical scheme still has: the arc concave surface is provided in the middle part of the anti-abrasion roller. The arc concave surface of the middle part of the anti-abrasion roller can prevent the pump pipe from sliding horizontally to the two sides of the anti-abrasion roller when lowering, avoiding the pump pipe from sliding out of the anti-abrasion roller and failing to prevent abrasion.

[0017] The utility model discloses a technical scheme still has: the anti-abrasion roller is rubber material. The anti-abrasion roller prepared by rubber material plays the role of buffering, and increases the friction force between the pump pipe and the anti-abrasion roller, improves the stability of the pump pipe in the lowering process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic drawing of the down pipe auxiliary device of the ground source heat pump pipe of the utility model;

[0019] Figure 2 It is the sectional view of the down pipe auxiliary device of the ground source heat pump pipe of the utility model;

[0020] Figure 3 It is the use state reference drawing of the down pipe auxiliary device of the ground source heat pump pipe of the utility model;

[0021] In the drawing, 100 is a well, 200 is a pump pipe, 300 is a counterweight, 400 is a pressing rod;

[0022] 1 guide pipe, 101 positioning flange;

[0023] 2 anti-abrasion roller, 3 guide support plate, 31 guide slide;

[0024] 4 sliding block, 41 threaded hole;

[0025] 5 fixing bolt, 6 ball;

[0026] 11 guide pipe body, 12 ball retainer, 13 recessed groove, 14 limiting hole. DETAILED DESCRIPTION

[0027] Clearly and completely describe the technical solutions in the embodiments of the utility model with the drawings, obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the scope of protection of the utility model.

[0028] As Figure 1 The lower pipe auxiliary device of the ground source heat pump pipe comprises a hollow guide pipe 1 and an anti-abrasion roller 2, the upper end of the guide pipe 1 is provided with a positioning flange 101, the anti-abrasion roller 2 is horizontally arranged above the positioning flange 101, and the anti-abrasion roller 2 can rotate around the axis thereof.

[0029] The inner diameter of the guide pipe 1 is less than or equal to the inner diameter of the drill hole 100. When the inner diameter of the guide pipe 1 is equal to the inner diameter of the drill hole, a groove matched with the outer diameter of the guide pipe 1 is arranged at the upper end of the drill hole, so that the guide pipe 1 is fixed and limited. When the inner diameter of the guide pipe 1 is equal to the inner diameter of the drill hole, the outer diameter of the guide pipe 1 is slightly smaller than the inner diameter of the drill hole, so that the guide pipe 1 can be directly inserted into the drill hole without additional treatment of the drill hole.

[0030] In the embodiment, the middle part of the anti-abrasion roller 2 is provided with an arc-shaped concave surface, and the anti-abrasion roller 2 is made of rubber.

[0031] The lower pipe auxiliary device of the ground source heat pump pipe further comprises a pipeline position adjusting mechanism, the pipeline position adjusting mechanism comprises a guide support plate 3, a sliding block 4 slidably arranged in the guide support plate 3 and a fixing bolt 5.

[0032] The guide support plate 3 is fixedly arranged above the positioning flange 101 in parallel with the longitudinal section of the guide pipe 1, two guide support plates 3 are arranged in parallel on the two sides of the guide pipe 1, the anti-abrasion roller 2 is rotatably arranged on the sliding block 4 through a rotating shaft or rotatably arranged on the sliding block 4 through bearings at the two ends of the anti-abrasion roller 2, a guide slide 31 is arranged through the side wall of the guide support plate 3, the guide slide 31 is horizontally arranged and parallel to the longitudinal section of the guide pipe 1, the sliding block 4 is provided with a threaded hole 41, and the fixing bolt 5 is threadedly connected with the threaded hole 41 through the guide slide 31.

[0033] As Figure 1 And Figure 2 The lower pipe auxiliary device of the ground source heat pump pipe further comprises a plurality of balls 6, a plurality of balls 6 in the shape of spheres are embedded in the inner wall of the guide pipe 1 from top to bottom, the balls 6 are rotatably arranged on the guide pipe 1, the balls 6 protrude from the inner wall of the guide pipe 1, and the balls 6 are uniformly distributed in the circumferential direction of the guide pipe 1.

[0034] As Figure 2As shown, the guide tube 1 includes a coaxially arranged guide tube body 11 and a ball retainer 12, and the ball retainer 12 is arranged in the guide tube body 11. Specifically, the guide tube body 11 is symmetrically arranged in two parts along the axial direction, and the two halves of the guide tube body 11 are combined together to set the ball retainer 12 in the guide tube body 11.

[0035] The inner wall of the guide tube body 11 is provided with a groove 13 that matches the ball 6, and the ball retainer 12 is provided with a limiting hole 14 that matches the ball 6. The ball 6 is rotatably disposed between the groove 13 and the limiting hole 14. In this embodiment, the guide tube body 11, ball retainer 12, and ball 6 are all made of steel, ensuring wear resistance and strength.

[0036] Working principle: Figure 3 As shown, a counterweight 300 is provided at the lower end of the pump tube 200 and placed into the wellbore 100. A push-down rod 400 is provided on the upper end surface of the counterweight 300. Under the gravity of the counterweight 300 and the push-down rod 400, the pump tube 200 moves downward along the axial direction of the wellbore 100. The connection between the counterweight 300, the push-down rod 400, and the pump tube 200 is achieved using existing technology and will not be described in detail here.

[0037] In order to prevent the pump pipe 200 from being worn due to friction with the upper edge of the drilling rig 100, the guide pipe 1 is placed into the drilling rig 100 before the pipe is lowered. The positioning flange 101 can effectively ensure that the guide pipe 1 and the drilling rig 100 remain coaxial and avoid the shaking of the anti-wear roller 2 above. The pump pipe 200 is placed into the drilling rig 100 through the anti-wear roller 2 and the guide pipe 1. This can avoid friction between the pump pipe 200 and the upper edge of the drilling rig 100, reduce the wear of the pump pipe 200, and the anti-wear roller 2 can reduce the friction of the lowered pipe, thereby increasing the speed below the pump pipe 200.

Claims

1. A ground source heat pump pipe lowering auxiliary device, characterized by: It comprises a hollow guide tube (1) and an anti-wear roller (2), wherein the upper end of the guide tube (1) is provided with a positioning flange (101), the anti-wear roller (2) is horizontally arranged above the positioning flange (101), and the anti-wear roller (2) is capable of rotating around its own axis; The inner diameter of the guide tube (1) is smaller than or equal to the inner diameter of the wellbore (100).

2. The ground source heat pump pipe lowering auxiliary device according to claim 1, characterized in that: It also includes a pipeline position adjustment mechanism, which includes a guide support plate (3), a slider (4) slidably arranged in the guide support plate (3), and a fixing bolt (5); The guide support plate (3) is fixedly arranged above the positioning flange (101) parallel to the longitudinal section of the guide tube (1); the anti-wear roller (2) is rotatably arranged on the slider (4); a guide slideway (31) is provided through the side wall of the guide support plate (3); the slider (4) is provided with a threaded hole (41); the fixing bolt (5) passes through the guide slideway (31) and is threadedly connected to the threaded hole (41).

3. The ground source heat pump pipe lowering auxiliary device according to claim 1 or 2, characterized in that: The guide tube (1) further comprises a plurality of spherical balls (6) embedded in the inner wall of the guide tube (1) from top to bottom. The balls (6) are rotatably arranged on the guide tube (1) and protrude from the inner wall of the guide tube (1).

4. The ground source heat pump pipe lowering auxiliary device according to claim 3, characterized in that: The balls (6) are evenly distributed along the circumference of the guide tube (1).

5. The ground source heat pump pipe lowering auxiliary device according to claim 3, characterized in that: The guide tube (1) comprises a coaxially arranged guide tube body (11) and a ball retainer (12), wherein the ball retainer (12) is arranged in the guide tube body (11); A groove (13) matching the ball (6) is provided on the inner wall of the guide tube body (11), a limiting hole (14) matching the ball (6) is provided on the ball retainer (12), and the ball (6) is rotatably arranged between the groove (13) and the limiting hole (14).

6. The ground source heat pump pipe lowering auxiliary device according to claim 1 or 2, characterized in that: The anti-wear roller (2) is provided with an arc-shaped concave surface in the middle.

7. The ground source heat pump pipe lowering auxiliary device according to claim 1 or 2, characterized in that: The anti-wear roller (2) is made of rubber.

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