An automatic measuring device for the length of a vertical ground source heat pump borehole

Abstract

The utility model relates to measuring device technical field especially relates to a kind of ground source heat pump system vertical buried pipe length automatic measuring device.Its technical scheme includes wellhead fixed mechanism, measuring device, alarm module and auxiliary positioning assembly, for alignment and constrain borehole mouth drop trajectory.Measuring device core is elastic compression type pulley measuring mechanism, through high elasticity stainless steel compression spring, ensure close contact without sliding;Pulley inside is provided with light transmission hole, cooperate infrared sensing probe and reflector plate to constitute photoelectric counter, measure pulley number.Data acquisition processing module receives signal and real-time calculation, display length, trigger alarm when out-of-tolerance.In addition, the auxiliary positioning assembly additionally added and main measuring pulley form stable clamping, prevent pipe material to jump and measure failure.This device realizes the real-time, automatic, high-precision measurement of buried pipe drop length, effectively guarantees the construction quality of ground source heat pump system buried pipe heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of measuring device technology, and in particular to an automatic measuring device for the length of vertical buried pipes in a ground source heat pump system. Background Technology

[0002] Shallow ground source heat pump systems are highly efficient and energy-saving systems that use shallow geothermal energy as their primary energy source. By consuming a small amount of electricity, they provide heating, cooling, and domestic hot water to buildings, making them one of the most promising renewable energy technologies under the "dual carbon" target (carbon reduction and emission reduction). Ground source heat pump systems exchange heat with the soil through double-U-shaped or single-U-shaped pipes (usually PE pipes) vertically buried in the underground rock. Their heat exchange efficiency directly depends on the accuracy of the buried pipe's depth. Insufficient pipe length (not reaching the design depth) will lead to a reduced heat exchange area and decreased system energy efficiency; excessive length may damage the underground structure or increase costs.

[0003] Currently, underground pipe laying construction mainly relies on manual measurement: construction workers estimate the pipe laying depth by referring to the length marked on the PE or by using a measuring tape. This approach has several drawbacks: manual measurement is affected by operational experience, and the vertical distance from the borehole opening to the bottom of the pipe is easily deviated due to factors such as slack traction ropes, pipe swaying, and wear of length markings (common errors exceeding ±100mm), failing to meet design accuracy (usually requiring within ±10mm); poor real-time performance: the pipe laying length cannot be measured in real time, reducing construction efficiency; lack of data traceability: manual records are easily lost or tampered with, failing to provide reliable evidence for later system debugging and quality acceptance; and weak environmental adaptability: the borehole is damp, mud splashes, and traditional electronic instruments are easily corroded or interfered with, making stable operation difficult.

[0004] Therefore, there is an urgent need for a device that can measure the length of buried pipes in real time with high precision and automatically to solve the above-mentioned construction pain points. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an automatic measuring device for the length of vertical buried pipes in a ground source heat pump system.

[0006] This application provides an automatic measuring device for the length of vertical buried pipes in a ground source heat pump system, including a wellhead fixing mechanism, a measuring device, and an alarm module; The wellhead fixing mechanism includes a fixing bracket and a guide sleeve. The guide sleeve is vertically fixed on the fixing bracket, and the measuring device is fixed on the inner side of the guide sleeve. The measuring device includes an elastic module, a pulley fixing assembly, and a photoelectric counter; The elastic module includes a steel top plate, a high-elasticity stainless steel compression spring, and a U-shaped bracket. The steel top plate is fixedly installed on the inner wall of the guide sleeve, and the high-elasticity stainless steel compression spring is installed between the steel top plate and the U-shaped bracket. The pulley fixing assembly includes a pulley and a light-transmitting hole, wherein the light-transmitting hole is formed inside the pulley; The photoelectric counter includes an infrared sensor, a reflector, and a data acquisition, processing, and alarm module. The infrared sensor and the reflector are respectively disposed on both sides of the light-transmitting hole, and the data acquisition, processing, and alarm module is connected to the infrared sensor.

[0007] Optionally, the elastic module is embedded in the movable keyway of the pulley fixing assembly via a U-shaped bracket.

[0008] Optionally, the pulley fixing assembly further includes two bearings and a second U-shaped bracket, with the two bearings respectively disposed at both ends of the second U-shaped bracket.

[0009] Optionally, the pulley is mounted on the second U-shaped bracket via the bearing.

[0010] Optionally, the data acquisition, processing, and alarm module is connected to the infrared sensor probe via a signal line.

[0011] Optionally, an auxiliary positioning component is provided inside the guide sleeve on the side away from the steel top plate; The auxiliary positioning component includes a threaded sleeve, which is disposed inside the guide sleeve on the side away from the steel top plate. Inside the threaded sleeve, there is a threaded rod that matches the internal thread, and one end of the threaded rod is connected to a movable seat via a rotating shaft.

[0012] Optionally, the auxiliary positioning component further includes an auxiliary wheel designed to fit the pipe, the outer wall of the auxiliary wheel being provided with a C-shaped bracket, and the C-shaped bracket being fixed to one side of the outer wall of the movable seat.

[0013] Optionally, the outer wall of the movable seat is provided with a guide rod that can slide and be positioned inside the threaded sleeve.

[0014] In summary, this application includes at least one of the following beneficial technical effects: This invention combines a photoelectric counter with an elastically clamping pulley mechanism to achieve high-precision, automated measurement of the length of buried pipes, completely eliminating subjective errors caused by manual measurement, and ensuring accurate and reliable measurement results.

[0015] The system further displays the pipe depth in real time and immediately alarms when the length does not meet the preset requirements, significantly improving the automation level and work efficiency of the construction process and reducing the need for human intervention and monitoring. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of an automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to this utility model is provided. Figure 2 This is a schematic diagram of the inner structure of the guide sleeve; Figure 3 This is a schematic diagram of the cross-sectional structure of the guide sleeve; Figure 4 This is a schematic diagram of a threaded sleeve structure; Figure 5 for Figure 2 Schematic diagram of the structure at point A in the middle.

[0017] Reference numerals in the attached diagram: 1. Fixed bracket; 2. Guide sleeve; 3. Steel top plate; 4. High-elasticity stainless steel compression spring; 5. Movable keyway; 6. Pulley; 7. Bearing; 8. U-shaped bracket one; 9. U-shaped bracket two; 10. Light-transmitting hole; 11. Infrared sensor; 12. Data acquisition, processing and alarm module; 13. Reflector; 14. Threaded rod; 15. Threaded sleeve; 16. Rotating shaft; 17. Movable seat; 18. Auxiliary wheel; 19. Guide rod; 20. C-shaped bracket. Detailed Implementation

[0018] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-3 As shown, this utility model proposes an automatic measuring device for the length of vertical buried pipes in a ground source heat pump system, including a wellhead fixing mechanism. In one embodiment, the wellhead fixing mechanism includes a fixing bracket 1 and a guide sleeve 2. The guide sleeve 2 is vertically fixed to the fixing bracket 1, and the measuring device is fixed inside the guide sleeve 2. The wellhead fixing mechanism is described in detail below: In this embodiment, during the construction of the buried pipe, the wellhead fixing mechanism is first stably installed on the ground at the borehole opening by the fixing bracket 1. The guide sleeve 2 is vertically fixed on the fixing bracket 1 and coaxially aligned with the center of the borehole. This mechanism constrains the descent trajectory of the buried pipe through the guide sleeve 2, preventing the pipe from deviating or swinging at the entrance, and ensuring that the pipe enters the borehole smoothly in the vertical direction. The fixing bracket 1 provides overall support, while the inner wall of the guide sleeve 2 directly contacts the outer surface of the buried pipe, playing a preliminary guiding and positioning role.

[0020] like Figures 1-5As shown, the automatic measuring device also includes a measuring device; in one embodiment, the measuring device includes an elastic module, a pulley fixing assembly, and a photoelectric counter; The elastic module includes a steel top plate 3, a high-elasticity stainless steel compression spring 4, and a U-shaped bracket 8. The steel top plate 3 is fixedly installed on the inner wall of the guide sleeve 2, and the high-elasticity stainless steel compression spring 4 is installed between the steel top plate 3 and the U-shaped bracket 8. The pulley fixing assembly includes a pulley 6 and a light-transmitting hole 10, with the light-transmitting hole 10 being formed inside the pulley 6; The elastic module is embedded in the movable keyway 5 of the pulley fixing assembly via a U-shaped bracket 8; the pulley fixing assembly also includes two bearings 7 and a U-shaped bracket 2 9, with the two bearings 7 respectively located at both ends of the U-shaped bracket 2 9; the pulley 6 is mounted on the U-shaped bracket 2 9 via the bearings 7. The measuring device is described in detail below: In this embodiment, the elastic module is embedded in the movable keyway 5 of the pulley fixing assembly through the U-shaped bracket 8, so that the pulley fixing assembly can move slightly along the keyway direction. The steel top plate 3 is fixed to the inner wall of the guide sleeve 2. The high-elasticity stainless steel compression spring 4 is set between the steel top plate 3 and the U-shaped bracket 8 to provide continuous clamping force. The pulley fixing assembly includes a pulley 6, a bearing 7 and a U-shaped bracket 9. The pulley 6 is installed on the U-shaped bracket 9 through two bearings 7, so that the pulley 6 can rotate smoothly when the buried pipe is lowered. The elastic force of the high-elasticity stainless steel compression spring 4 is transmitted to the pulley fixing assembly through the U-shaped bracket 8 to ensure that the pulley 6 always presses against the surface of the buried pipe and avoids slippage.

[0021] like Figures 1-5 As shown, the automatic measuring device also includes an alarm module; in one embodiment, the photoelectric counter includes an infrared sensor 11, a reflector 13 and a data acquisition, processing and alarm module 12. The infrared sensor 11 and the reflector 13 are respectively disposed on both sides of the light-transmitting hole 10, and the data acquisition, processing and alarm module 12 is connected to the infrared sensor 11. The data acquisition, processing, and alarm module 12 is connected to the infrared sensor 11 via a signal line. The alarm module is described in detail below: In this embodiment, the light-transmitting hole 10 is opened inside the pulley 6, and periodically aligns the infrared sensor 11 and the reflector 13 as the pulley rotates. The infrared sensor 11 emits infrared rays. When the light-transmitting hole 10 rotates to the aligned position, the rays pass through the hole and are reflected back to the sensor by the reflector 13. The infrared sensor 11 is connected to the data acquisition, processing and alarm module 12 through a signal line. The module receives the sensor signal and calculates the number of rotations of the pulley, and then calculates the length of the lower tube according to a preset algorithm.

[0022] like Figures 1-4As shown, the automatic measuring device also includes an auxiliary positioning component; in one embodiment, the auxiliary positioning component is provided inside the guide sleeve 2 on the side away from the steel top plate 3; The auxiliary positioning component includes a threaded sleeve 15, which is located inside the guide sleeve 2 on the side away from the steel top plate 3. Inside the threaded sleeve 15, there is a threaded rod 14 that matches the internal thread. One end of the threaded rod 14 is connected to a movable seat 17 via a rotating shaft 16. The auxiliary positioning assembly also includes an auxiliary wheel 18 designed to fit the pipe. A C-shaped bracket 20 is provided on the outer wall of the auxiliary wheel 18, and the C-shaped bracket 20 is fixed to one side of the outer wall of the movable seat 17. A guide rod 19, which can slide and be positioned inside the threaded sleeve 15, is provided on the outer wall of the movable seat 17. The auxiliary positioning assembly is described in detail below: In this embodiment, measurement is achieved through a light-transmitting hole 10, an infrared sensor 11, a reflector 13, and a data acquisition, processing, and alarm module 12. The light-transmitting hole 10 is located inside the pulley 6 and periodically aligns the infrared sensor 11 and the reflector 13 as the pulley rotates. The infrared sensor 11 emits infrared rays; when the light-transmitting hole 10 rotates to the aligned position, the rays pass through the hole and are reflected back to the sensor by the reflector 13. The infrared sensor 11 is connected to the data acquisition, processing, and alarm module 12 via a signal line. The module receives the sensor signal, calculates the number of pulley rotations, and then determines the lower tube length according to a preset algorithm.

[0023] Specifically, during installation, the device is secured to the ground at the borehole opening using the fixed bracket 1. The guide sleeve 2 is adjusted so that its centerline coincides with the borehole axis. During the pipe lowering process, the buried pipe passes vertically through the center of the guide sleeve 2. Its inner wall effectively constrains the pipe, limiting lateral offset and sway at the inlet, ensuring that the pipe is lowered smoothly along the preset trajectory, and establishing a stable spatial reference for length measurement.

[0024] The pulley fixing assembly is equipped with a movable keyway 5, into which a U-shaped bracket 8 is embedded, giving the assembly radial freedom of movement. The pulley 6 is mounted on the U-shaped bracket 9 via two bearings 7. The preload of the high-elasticity stainless steel compression spring 4 acts on the pulley fixing assembly through the U-shaped bracket 8, pushing the pulley 6 to press against the surface of the buried pipe. When the pipe is lowered, the friction between the pipe wall and the pulley 6 drives it to rotate. The elastic pressure ensures that the two are in close contact without relative slippage, so that the number of rotations of the pulley precisely corresponds to the length of the pipe.

[0025] A light-transmitting hole 10 is made inside the pulley 6, and an infrared sensor 11 and a reflector 13 are respectively set on both sides of it. Every time the pulley rotates to the angle where the light-transmitting hole 10 is aligned with the sensor, the infrared rays pass through the hole, are reflected by the reflector 13 and are received by the sensor, generating a counting pulse. This signal is transmitted to the data acquisition, processing and alarm module 12. The module accumulates the number of pulses and, combined with the pre-stored pulley circumference parameter, calculates and displays the current lower tube depth in real time using the algorithm of "lower tube length L = number of pulley rotations N × π × pulley diameter".

[0026] An auxiliary wheel 18 with a C-shaped bracket 20 is installed on the movable seat 17, and a guide rod 19 is provided to ensure that the movable seat 17 moves in a straight line. Rotating the threaded rod 14 can drive the movable seat 17 and the auxiliary wheel 18 to move radially, so that the auxiliary wheel 18 presses against the outer wall of the buried pipe, forming a stable three-point clamping structure together with the pulley 6. This structure effectively suppresses pipe vibration and jumping, ensures that the pipe is always in reliable contact with the pulley 6, and prevents measurement errors caused by separation.

[0027] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An automatic measuring device for the length of vertical buried pipes in a ground source heat pump system, characterized in that; Includes wellhead fixing mechanism, measuring device and alarm module; The wellhead fixing mechanism includes a fixing bracket (1) and a guide sleeve (2). The guide sleeve (2) is vertically fixed on the fixing bracket (1), and the measuring device is fixed on the inner side of the guide sleeve (2). The measuring device includes an elastic module, a pulley fixing assembly, and a photoelectric counter; The elastic module includes a steel top plate (3), a high-elasticity stainless steel compression spring (4), and a U-shaped bracket (8). The steel top plate (3) is fixedly installed on the inner wall of the guide sleeve (2), and the high-elasticity stainless steel compression spring (4) is installed between the steel top plate (3) and the U-shaped bracket (8). The pulley fixing assembly includes a pulley (6) and a light-transmitting hole (10), wherein the light-transmitting hole (10) is opened inside the pulley (6); The photoelectric counter includes an infrared sensor (11), a reflector (13), and a data acquisition, processing, and alarm module (12). The infrared sensor (11) and the reflector (13) are respectively disposed on both sides of the light-transmitting hole (10), and the data acquisition, processing, and alarm module (12) is connected to the infrared sensor (11).

2. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 1, characterized in that, The elastic module is embedded in the movable keyway (5) of the pulley fixing assembly via a U-shaped bracket (8).

3. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 1, characterized in that, The pulley fixing assembly also includes two bearings (7) and a U-shaped bracket (9), with the two bearings (7) respectively located at both ends of the U-shaped bracket (9).

4. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 3, characterized in that, The pulley (6) is mounted on the U-shaped bracket (9) via the bearing (7).

5. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 1, characterized in that, The data acquisition, processing and alarm module (12) is connected to the infrared sensor (11) via a signal line.

6. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 1, characterized in that, An auxiliary positioning component is provided inside the guide sleeve (2) on the side away from the steel top plate (3); The auxiliary positioning component includes a threaded sleeve (15), which is located inside the guide sleeve (2) on the side away from the steel top plate (3). Inside the threaded sleeve (15) is a threaded rod (14) that matches the internal thread. One end of the threaded rod (14) is connected to a movable seat (17) via a rotating shaft (16).

7. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 6, characterized in that, The auxiliary positioning component also includes an auxiliary wheel (18) designed to fit the pipe. The outer wall of the auxiliary wheel (18) is provided with a C-shaped bracket (20), which is fixed to one side of the outer wall of the movable seat (17).

8. The automatic measuring device for the length of vertical buried pipes in a ground source heat pump system according to claim 7, characterized in that, The outer wall of the movable seat (17) is provided with a guide rod (19) that can slide and be positioned inside the threaded sleeve (15).

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