Pipe lowering device for mounting ground source heat pump

Abstract

The utility model discloses a pipe lowering device for ground source heat pump installation, which relates to the technical field of ground source heat pump installation equipment and comprises a plurality of connecting pipes and a rod-shaped body, the connecting pipes are sequentially connected from top to bottom, the rod-shaped body is located at the lowermost end, each connecting pipe comprises a pipe body and a center rod, and vertical inserting grooves are formed in the centers of the upper ends of the pipe bodies and the rod-shaped body. A male head matched with the slot is arranged at the lower end of the pipe body; the center rod is rotatably installed in the pipe body, two inserting holes are formed in the side wall of the inserting groove in a circumferential array mode, through holes are formed in the positions, corresponding to the inserting holes, of the side wall of the male head, inserting rods are slidably installed in the through holes, horizontally-arranged connecting rods are hinged to the inner ends of the inserting rods, the other ends of the connecting rods are hinged to the outer wall of the center rod, and all the connecting rods are arranged in a circumferential array mode; the connecting mechanism of the device is simple in structure, easy and convenient to operate, firm in connection, safer to use, not prone to damage and capable of being used repeatedly.

Description

Technical Field

[0001] The utility model relates to the technical field of ground source heat pump installation equipment, and particularly relates to a pipe lowering device for ground source heat pump installation. Background Technique

[0002] A ground source heat pump is a device that transfers low-grade heat energy to high-grade heat energy by inputting a small amount of high-grade energy (such as electric energy) from shallow terrestrial energy. Its working principle is to collect geothermal energy through underground heat exchangers buried in the ground, and heat exchange with the geothermal energy in the soil through the transmission of a heat medium in the heat exchanger. However, in the construction of heat exchangers, especially in the construction of vertical hole heat exchangers, for vertical heat exchangers about 100 meters long, it has always been a difficult point to safely and stably install them in the heat exchange holes. At present, most of the pipe lowering tools in the process of lowering pipes into vertical ground source wells are thread-connected. Threaded connections have disadvantages such as insufficient firmness, easy loosening, and short service life. During use, loosening at the threaded part is likely to cause the equipment to fall and be damaged, resulting in losses.

[0003] Chinese Patent CN201822036941.7 discloses a pipe lowering device in a ground source heat pump, which includes a rod-shaped body and multiple connecting pipes. A first cylinder is fixedly installed at the lower end of the connecting pipe. Second cylinders are fixedly installed at the upper ends of the connecting pipe and the rod-shaped body. A first through hole is opened in the middle of the bottom surface of the first cylinder, and a first piston rod is fitted in the first through hole. A vertical shaft is arranged in the connecting pipe, and the lower end of the vertical shaft is fixedly connected to the upper end of the first piston rod. A first spring is sleeved on the vertical shaft. One end of the first spring is fixedly connected to the side of the vertical shaft, and the other end of the first spring is fixedly connected to the inner wall of the corresponding connecting pipe. A cylindrical groove is opened in the middle of the top surface of the second cylinder, and a second piston rod is fitted in the cylindrical groove. A second through hole is opened in the middle of the top surface of the second piston rod, and a vertical pipe is fixedly installed in the second through hole; the connection mechanism of this pipe lowering device is complex in structure, cumbersome to operate, and has poor practicability. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pipe lowering device for ground source heat pump installation in view of the defects existing in the prior art.

[0005] The technical solution of the utility model is: a pipe lowering device for ground source heat pump installation, which includes multiple connecting pipes connected in sequence from top to bottom and a rod-shaped body at the lowermost end. The connecting pipe includes a pipe body and a central rod. Vertical slots are opened at the centers of the upper ends of the pipe body and the rod-shaped body. A male head adapted to the slot is provided at the lower end of the pipe body. The central rod is rotatably installed in the pipe body. A plurality of jacks are arranged in a circumferential array on the side wall of the slot. Through holes are opened at the positions corresponding to the jacks on the side wall of the male head. Plug rods are slidably installed in the through holes. The inner ends of the plug rods are hinged with horizontally arranged connecting rods. The other ends of the connecting rods are hinged on the outer wall of the central rod, and all the connecting rods are arranged in a circumferential array.

[0006] Preferably, two jacks are arranged in a circumferential array on the side wall of the slot. Correspondingly, two inserting rods are provided in the male head.

[0007] Preferably, a positioning block is provided at the lower end of the male head. A first positioning hole adapted to the positioning block is provided at the bottom of the slot of the rod-shaped body socket. A second positioning hole adapted to the positioning block is provided at the upper end of the central rod. When the inserting rod on the connecting pipe completely protrudes, the second positioning hole on its central rod is vertically aligned with the positioning block on the male head.

[0008] Preferably, the rod-shaped body is a hollow sleeve structure.

[0009] Preferably, a sub-joint is fixedly installed at the bottom of the rod-shaped body.

[0010] Compared with the prior art, the present utility model has the following advantages:

[0011] The connection mechanism of this device has a simple structure, is easy to operate, has a firm connection, is safer to use, is not easily damaged, and can be used multiple times. It is more firm and has a longer service life compared with the traditional threaded connection; when the positioning block on the male head is docked with the corresponding second positioning hole, the positioning block locks the lower central rod, avoiding the problem that the pipe lowering device is disengaged due to the rotation of the central rod when lowering the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic perspective view of the connecting pipe;

[0013] Figure 2 Cross-sectional view of the connecting pipe;

[0014] Figure 3 For Figure 2 Enlarged view of part A in

[0015] Figure 4 Schematic structural view of the rod-shaped body installed with an inverted "Y" type sub-joint;

[0016] Figure 5 Schematic structural view of the rod-shaped body installed with a double "Y" type sub-joint.

[0017] In the figure: 1, pipe body; 2, central rod; 3, rod-shaped body; 4, socket; 5, male head; 501, through hole; 6, jack; 7, inserting rod; 8, connecting rod; 9, positioning block; 10, first positioning hole; 11, second positioning hole; 12, sub-joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the present utility model in conjunction with the drawings and embodiments. Embodiment 1

[0019] Refer to Figures 1-4As shown in the figure, a pipe lowering device for ground source heat pump installation includes a plurality of connecting pipes connected in sequence from top to bottom and a rod-shaped body 3 at the lowermost end. The connecting pipes include a pipe body 1 and a central rod 2. A vertical slot 4 is provided at the center of the upper end of the pipe body 1 and the rod-shaped body 3. A male head 5 adapted to the slot 4 is provided at the lower end of the pipe body 1; the central rod 2 is rotatably installed inside the pipe body 1. Two jacks 6 are arranged in a circumferential array on the side wall of the slot 4. Through holes 501 are provided at the positions corresponding to the jacks 6 on the side wall of the male head 5. Plug rods 7 are slidably installed in the through holes 501. The inner ends of the plug rods 7 are hinged with horizontally arranged connecting rods 8. The other ends of the connecting rods 8 are hinged on the outer wall of the central rod 2, and all the connecting rods 8 are arranged in a circumferential array.

[0020] When connecting two connecting pipes, insert the male head 5 into the corresponding slot 4, and then rotate the central rod 2. It drives the plug rod 7 to protrude outwards along the through hole 501 through the connecting rod 8 until it is inserted into the jack 6, completing the connection of the two connecting pipes. Similarly, the rod-shaped body 3 and the connecting pipe can be quickly inserted. The assembly sequence of this device is to first connect the rod-shaped body 3 with one of the connecting pipes, and then connect other connecting pipes in sequence at the upper end of this connecting pipe.

[0021] More specifically, the rod-shaped body 3 is a hollow sleeve structure. With such a structure, the overall joint of the pipe lowering device presents a "sleeve type" structure. When in use, insert the corresponding connecting part of the heat exchanger into the rod-shaped body 3. When lowering the pipe, push the connecting pipe to apply a downward force to the heat exchanger, and push the heat exchanger to overcome the buoyancy or well wall friction force of the water or mud in the soil source well and other reverse force effects and move downward to the bottom of the well for positioning. When the pipe lowering device is taken out, the heat exchanger can naturally disengage. Embodiment Two

[0022] As a preferred embodiment of the present utility model, a positioning block 9 and a positioning hole are added in this embodiment on the basis of Embodiment One. Specifically:

[0023] In this embodiment, a positioning block 9 is provided at the lower end of the male head 5. A first positioning hole 10 adapted to the positioning block 9 is provided at the bottom of the slot 4 of the rod-shaped body 3. A second positioning hole 11 adapted to the positioning block 9 is provided at the upper end of the central rod 2. When the plug rod 7 on the connecting pipe completely protrudes, the second positioning hole 11 on the central rod 2 is aligned with the positioning block 9 on the male head 5 up and down.

[0024] When the positioning block 9 on the male head 5 is docked with the corresponding second positioning hole 11, the positioning block 9 locks the lower central rod 2, avoiding the problem of the pipe lowering device coming off caused by the rotation of the central rod 2 when lowering the well. Embodiment Three

[0025] A sub-joint 12 is added in this embodiment on the basis of Embodiment Two. Specifically:

[0026] In this embodiment, a sub-joint 12 is fixedly installed at the bottom of the rod-shaped body 3. The design of the sub-joint 12 enables more convenient connection to the heat exchanger.

[0027] As Figure 4 shown, the longitudinal section of the sub-joint 12 is an inverted "Y" shape. With such a structure, the overall structure of the lower pipe tool joint presents a "single Y type" structure, which is suitable for the lower pipe construction operation when the heat exchanger is a single U-shaped casing type.

[0028] As Figure 5 shown, the longitudinal section of the sub-joint 12 is an inverted double "Y" shape. With such a structure, the overall structure of the lower pipe tool joint presents a "double Y type" structure, which is suitable for the lower pipe construction operation when the heat exchanger is a double U-shaped casing type.

[0029] The present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present utility model, and the changed content still falls within the protection scope of the present utility model.

Claims

1. A pipe lowering device for ground source heat pump installation, comprising a plurality of connecting pipes sequentially connected up and down and a rod-shaped body located at the lowermost end, characterized in that: The connecting pipe includes a pipe body and a central rod. A vertical slot is provided at the center of the upper end of the pipe body and the rod-shaped body. A male head adapted to the slot is provided at the lower end of the pipe body. The central rod is rotatably installed in the pipe body. A plurality of jacks are arranged in a circumferential array on the side wall of the slot. Through holes are provided at positions corresponding to the jacks on the side wall of the male head. Plug rods are slidably installed in the through holes. A horizontally arranged connecting rod is hinged to the inner end of the plug rod. The other end of the connecting rod is hinged to the outer wall of the central rod, and all the connecting rods are arranged in a circumferential array.

2. The downhole pipe placer for ground source heat pump installation according to claim 1, characterized in that: Two jacks are arranged in a circumferential array on the side wall of the slot. Correspondingly, two plug rods are provided in the male head.

3. The pipe lowering device for ground source heat pump installation according to claim 1, characterized in that: A positioning block is provided at the lower end of the male head. A first positioning hole adapted to the positioning block is provided at the bottom of the slot of the rod-shaped body. A second positioning hole adapted to the positioning block is provided at the upper end of the central rod. When the plug rod on the connecting pipe completely extends out, the second positioning hole on the central rod is vertically aligned with the positioning block on the male head.

4. The downhole pipe placer for ground source heat pump installation according to claim 3, characterized in that: The rod-shaped body is a hollow sleeve structure.

5. The downhole pipe placer for ground source heat pump installation according to claim 4, characterized in that: A sub-joint is fixedly installed at the bottom of the rod-shaped body.

Images