A rapid positioning device for heat pipes in frozen soil roadbeds

Abstract

This utility model provides a rapid positioning device for heat pipes in frozen soil roadbeds. The device includes a centering rod, heat pipes, and a GPS handheld device. A first laser rangefinder, a second laser rangefinder, and a fixing sleeve are respectively installed on the outer side of the centering rod. Both the first and second laser rangefinders are fixedly connected to the centering rod via a fixing clamp on one side. The inner ring of the fixing sleeve is fixedly connected to the outer side of the centering rod. A spirit level and a connecting mechanism are respectively installed on the outer side of the fixing sleeve. A fixing mechanism is installed on one side of the connecting mechanism. A support rod is installed at the bottom of the fixing mechanism. An installation mechanism is installed at the top of the centering rod, and a GPS receiver is installed at the top of the installation mechanism. The rapid positioning device for heat pipes in frozen soil roadbeds provided by this utility model solves the problem of poor portability caused by the fixed overall structure of current devices and the inconvenience of disassembling and carrying the various structural units.

Description

Technical Field

[0001] This utility model relates to the field of construction testing technology, and in particular to a rapid positioning device for heat pipes in frozen soil subgrade. Background Technology

[0002] Permafrost freezes like ice during the cold season. As the temperature drops, its volume expands, causing roadbeds, rails, and pipelines built on it to bulge. In summer, the thawing permafrost shrinks, causing the roadbeds and rails to sink back down. This repeated freezing and thawing of permafrost causes mud pumping and frost heaves in the roadbed, resulting in wavy, uneven rails that threaten the safety of railway and highway operations. Currently, permafrost roadbeds are mainly stabilized using heat pipes, also known as coreless gravity heat pipes or thermosiphons. These heat pipes consist of a sealed steel tube filled with liquid nitrogen or other working fluid. The upper part of the tube, called the condensation section, is equipped with cooling fins and is placed in the atmosphere; the lower part, called the evaporation section, is buried in the permafrost of the foundation. When a temperature difference exists in the evaporation section, the liquid nitrogen in the evaporation section absorbs heat and evaporates into gas. Under the action of the gas pressure difference, it rises along the gaps inside the pipe to the condensation section, where it releases its latent heat of vaporization upon contact with the cooler pipe wall, condenses into liquid, and flows down the pipe wall under the action of gravity. This cycle repeats, transferring heat from the strata to the atmosphere, thereby lowering the ground temperature of the permafrost and preventing it from melting, thus achieving the purpose of stabilizing the roadbed.

[0003] Before installing the heating rod, a hole needs to be drilled in the frozen soil subgrade. Then, the heating rod is dropped into the hole. The heating rod needs to be aligned in the hole according to the design requirements. After the insertion depth and verticality of the heating rod are checked and found to be qualified, the heating rod is fixed with a bracket. Finally, the gap between the heating rod and the hole wall is backfilled.

[0004] Patent document CN219841924U discloses a "rapid positioning device for heat pipes in frozen soil subgrade," comprising a prism centering rod with graduated lines along its length at the bottom; a first laser rangefinder and a second laser rangefinder are spaced apart from top to bottom on the centering rod, and are detachably connected to the centering rod; both the first and second laser rangefinders are used for emitting horizontal lasers and real-time distance measurement; and a GPS receiver is installed at the top of the centering rod. This invention's rapid positioning device for heat pipes in frozen soil subgrade improves the efficiency of heat pipe positioning.

[0005] Although the device improves the positioning efficiency of the heat pipe by measuring the distance in real time with the first laser rangefinder and the second laser rangefinder, the overall structure of the device is fixed and the structural units are inconvenient to disassemble and carry, resulting in poor portability. In addition, it is inconvenient to adjust the support angle of the support rod. Therefore, it is necessary to provide a portable rapid positioning device for heat pipes in frozen soil subgrade to solve the above technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a portable rapid positioning device for heat pipes in frozen soil roadbeds.

[0007] The present invention provides a rapid positioning device for frozen soil roadbed using a heat pipe, comprising a centering rod, a heat pipe, and a GPS handheld device. A first laser rangefinder, a second laser rangefinder, and a fixing sleeve are respectively arranged on the outer side of the centering rod. Both the first and second laser rangefinders are fixedly connected to the centering rod via a fixing clamp on one side. The inner ring of the fixing sleeve is fixedly connected to the outer side of the centering rod. A spirit level and a connecting mechanism are respectively arranged on the outer side of the fixing sleeve. A fixing mechanism is arranged on one side of the connecting mechanism. A support rod is arranged at the bottom of the fixing mechanism. An installation mechanism is arranged at the top of the centering rod, and a GPS receiver is arranged at the top of the installation mechanism.

[0008] As a quick positioning device for heat pipes in frozen soil roadbed provided by this utility model, preferably, the connecting mechanism includes a connecting block, the connecting block is fixedly connected to the outside of the fixing sleeve, and fixing blocks are fixedly connected to both sides of the connecting block. The inner cavity of the fixing block is provided with a fixing bolt, and the outer side of the fixing bolt is threadedly connected to a fixing seat.

[0009] As a quick positioning device for heat pipes in frozen soil roadbed provided by this utility model, preferably, a docking groove is provided on one side of the connecting block, and a docking rod is slidably connected to the inner cavity of the docking groove.

[0010] As a preferred embodiment of the present invention, a rapid positioning device for heat pipes in frozen soil subgrade is provided. The fixing mechanism includes a fixing plate, which is fixedly connected to one side of a connecting block. A positive and negative threaded rod is rotatably fitted inside the fixing plate. A positive threaded block and a negative threaded block are respectively threaded to the outer sides of the positive and negative threaded rods. A moving block is fixedly connected to the outer sides of both the positive and negative threaded blocks. A limiting block is fixedly connected to one side of the fixing plate. A connecting plate is rotatably fitted to one side of the limiting block. The bottom of the connecting plate is fixedly connected to the top of the support rod.

[0011] As a quick positioning device for heat pipes in frozen soil subgrade provided by this utility model, preferably, the installation mechanism includes an installation frame, the installation frame is fixedly connected to the top of the centering rod, the inner cavity of the installation frame is slidably connected to an installation seat, the GPS receiver is installed on the top of the installation seat, the inner cavity of the installation seat is welded with a spring, and one end of the spring is welded with a locking block.

[0012] As a quick positioning device for heat pipes in frozen soil roadbed provided by this utility model, preferably, the installation mechanism further includes a limiting sleeve, the limiting sleeve is fixedly connected to the inner cavity of the mounting base, the inner cavity of the limiting sleeve is fixedly connected to a limiting rod, and the outer side of the limiting rod is welded to the inner cavity of the locking block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This rapid positioning device for frozen soil roadbed heat pipes allows for easy installation of a GPS receiver. Simply insert the mounting base at the bottom of the GPS receiver into the mounting frame, and the locking block will engage with the locking hole, completing the installation. When not in use, simply press the locking block to move it into the mounting base and out of the locking hole in the mounting frame, thus releasing the fixing between the mounting base and the mounting frame. For storage and transport, simply unscrew the fixing bolt from the fixing base to release the fixing plate. The user can then separate the support rod and the centering rod, facilitating separate transport and replacement of the support rod in case of future damage. This solves the problem of poor portability caused by the fixed overall structure of current devices and the inconvenience of disassembling and carrying individual structural units. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the rapid positioning device for heat pipes in frozen soil roadbeds provided by this utility model;

[0016] Figure 2 This is a top sectional view of a partial structure of this utility model;

[0017] Figure 3 This is a side structural sectional view of the fixing plate of this utility model;

[0018] Figure 4 This is a cross-sectional view of the installation mechanism of this utility model.

[0019] The diagram is labeled as follows: 1. Centering rod; 2. Fixing clamp; 3. First laser rangefinder; 4. Fixing sleeve; 5. Spirit level; 6. Connecting mechanism; 601. Connecting block; 602. Fixing block; 603. Fixing bolt; 604. Fixing seat; 7. Fixing mechanism; 701. Fixing plate; 702. Positive and negative threaded rods; 703. Positive threaded block; 704. Negative threaded block; 705. Limiting block; 706. Moving block; 707. Connecting plate; 8. Installation mechanism; 801. Installation frame; 802. Installation seat; 803. Spring; 804. Locking block; 805. Limiting sleeve; 806. Limiting rod; 9. GPS receiver; 10. Second laser rangefinder; 11. Heat rod; 12. Support rod; 13. Docking groove; 14. Docking rod; 15. GPS handpiece. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figures 1-4 ,in Figure 1A schematic diagram of a preferred embodiment of the rapid positioning device for heat pipes in frozen soil roadbeds provided by this utility model; Figure 2 This is a top sectional view of a partial structure of this utility model; Figure 3 This is a side structural sectional view of the fixing plate of this utility model; Figure 4 This is a cross-sectional view of the installation mechanism of this utility model. A rapid positioning device for a heat pipe in frozen soil subgrade includes a centering rod 1, a heat pipe 11, and a GPS handheld device 15. A first laser rangefinder 3, a second laser rangefinder 10, and a fixing sleeve 4 are respectively arranged on the outer side of the centering rod 1. The first laser rangefinder 3 and the second laser rangefinder 10 are both fixedly connected to the centering rod 1 through a fixing clamp 2 on one side. The inner ring of the fixing sleeve 4 is fixedly connected to the outer side of the centering rod 1. A spirit level 5 and a connecting mechanism 6 are respectively arranged on the outer side of the fixing sleeve 4. A fixing mechanism 7 is arranged on one side of the connecting mechanism 6. A support rod 12 is arranged at the bottom of the fixing mechanism 7. An installation mechanism 8 is arranged at the top of the centering rod 1. A GPS receiver 9 is arranged at the top of the installation mechanism 8.

[0022] In this embodiment: the first laser rangefinder 3 and the second laser rangefinder 10 are both used to emit horizontal lasers. The GPS receiver 9 is specifically model i90GNSS. The first laser rangefinder 3 and the second laser rangefinder 10 are fixed to the centering rod 1 by the fixing clamp 2. When adjusting the position of the first laser rangefinder 3 and the second laser rangefinder 10, it is only necessary to unscrew the bolt on the outside of the fixing clamp 2 to adjust the position of the first laser rangefinder 3 and the second laser rangefinder 10. After adjusting to the required position, the bolt can be tightened again.

[0023] As a technical optimization of this utility model, the connecting mechanism 6 includes a connecting block 601, which is fixedly connected to the outside of the fixing sleeve 4. Fixing blocks 602 are fixedly connected to both sides of the connecting block 601. A fixing bolt 603 is provided in the inner cavity of the fixing block 602, and a fixing seat 604 is threadedly connected to the outside of the fixing bolt 603.

[0024] The fixing mechanism 7 includes a fixing plate 701, which is fixedly connected to one side of the connecting block 601. The inner cavity of the fixing plate 701 is rotatably fitted with a positive and negative threaded rod 702. The outer sides of the positive and negative threaded rods 702 are respectively threaded with a positive threaded block 703 and a negative threaded block 704. The outer sides of both the positive threaded block 703 and the negative threaded block 704 are fixedly connected with a moving block 706. A limit block 705 is fixedly connected to one side of the fixing plate 701. A connecting plate 707 is rotatably fitted to one side of the limit block 705. The bottom of the connecting plate 707 is fixedly connected to the top of the support rod 12.

[0025] In this embodiment: one side of the fixing base 604 is fixed to one side of the fixing plate 701. A stabilizing sleeve is fixedly connected to the outer sides of both the positive thread block 703 and the negative thread block 704. A stabilizing rod is slidably connected to the inner ring of the stabilizing sleeve. Both ends of the stabilizing rod are fixed to the inner wall of the fixing plate 701. When fixing this device, the user can first rotate the support rod 12 to adjust it to the required angle, and then rotate the positive and negative thread screws 702. The rotation of the positive and negative thread screws 702 can cause the positive thread block 703 and the negative thread block 704 to move in opposite directions, thereby driving the moving block 706 to move. The moving block 706 cooperates with the limiting... Position block 705 clamps and fixes connecting plate 707, thereby fixing support rod 12, making it easy for users to adjust the angle of support rod 12. In addition, a rubber pad is provided on one side of moving block 706, which improves the fixing effect of moving block 706 on connecting plate 707. When storing and carrying this device, simply twist the fixing bolt 603 out of the fixing seat 604 to release the fixing plate 701. Then the user can separate support rod 12 from centering rod 1. This not only makes it easy for users to carry separately, but also makes it easy to replace support rod 12 if it is damaged in the future.

[0026] As a technical optimization of this utility model, a docking groove 13 is provided on one side of the connecting block 601, and a docking rod 14 is slidably connected to the inner cavity of the docking groove 13.

[0027] In this embodiment, one end of the docking rod 14 is fixedly connected to one side of the fixing plate 701. By setting the docking rod 14 to cooperate with the docking groove 13, the connection stability between the fixing plate 701 and the connecting block 601 is improved.

[0028] As a technical optimization of this utility model, the installation mechanism 8 includes an installation frame 801, which is fixedly connected to the top of the centering rod 1. An installation seat 802 is slidably connected to the inner cavity of the installation frame 801. The GPS receiver 9 is installed on the top of the installation seat 802. A spring 803 is welded to the inner cavity of the installation seat 802, and a locking block 804 is welded to one end of the spring 803.

[0029] The mounting mechanism 8 also includes a limiting sleeve 805, which is fixedly connected to the inner cavity of the mounting base 802. A limiting rod 806 is fixedly connected to the inner cavity of the limiting sleeve 805, and the outer side of the limiting rod 806 is welded to the inner cavity of the locking block 804.

[0030] In this embodiment, both sides of the mounting frame 801 are provided with locking holes for use with locking blocks 804. When installing the GPS receiver 9, simply insert the mounting base 802 at the bottom of the GPS receiver 9 into the mounting frame 801, and the locking blocks 804 will lock into the locking holes, thus completing the installation of the GPS receiver 9. When not in use, simply press the locking blocks 804 to move them into the mounting base 802 and out of the locking holes of the mounting frame 801, thereby releasing the fixing between the mounting base 802 and the mounting frame 801. Then, the user can remove the GPS receiver 9 for separate storage, improving the protection effect of the GPS receiver 9.

[0031] The working principle of the rapid positioning device for heat pipes in frozen soil roadbed provided by this utility model is as follows:

[0032] When using this device, first move the centering rod 1 to the edge of the frozen soil subgrade where the heat pipe 11 needs to be installed. Then rotate the support rod 12 to adjust it to the required angle. Next, rotate the positive and negative lead screws 702. The rotation of the positive and negative lead screws 702 causes the positive lead block 703 and the negative lead block 704 to move in opposite directions, thereby driving the moving block 706 to move. The moving block 706, in conjunction with the limiting blocks 705 and 705, clamps and fixes the connecting plate 707, thereby fixing the support rod 12. The support rod 12 ensures the structural stability of the device. Then, the centering rod 1 is adjusted by observing the level bubble 5 until it is vertical. The elevation of the top surface of the frozen soil subgrade is measured by the GPS receiver 9, and the elevation of the measured top surface of the frozen soil subgrade is obtained by observing the GPS handbook 15. Then, the difference between the design elevation of the road surface to be paved on the frozen soil subgrade and the elevation of the top surface of the frozen soil subgrade is calculated. The position of the second laser rangefinder 10 on the centering rod 1 is adjusted, and the scale line on the centering rod 1 is observed to ensure that the second laser rangefinder 10 is positioned on the road surface to be paved. The design elevation of the surface is determined by adjusting the heating rod 11 in the borehole so that the lasers emitted by the first laser rangefinder 3 and the second laser rangefinder 11 both irradiate the heating rod 11. The second laser rangefinder 10 irradiates the section of the heating rod 11 below the laser spot irradiated by the second laser rangefinder 10, which is the part of the heating rod 11 inserted into the borehole. This is determined based on the design value of the verticality of the heating rod 11 and the distance between the first laser rangefinder 3 and the second laser rangefinder 10. The difference between the measured values ​​of the first laser rangefinder 3 and the second laser rangefinder 10 is calculated by the vertical distance. Then, the verticality of the heating rod 11 is adjusted until the difference between the measured values ​​of the first laser rangefinder 3 and the second laser rangefinder 10 meets the design requirements. The difference l between the measured values ​​of the first laser rangefinder 3 and the second laser rangefinder 10 is calculated according to the formula l=D*tanα, where α is the design value of the verticality of the heating rod 11 and D is the vertical distance between the first laser rangefinder 3 and the second laser rangefinder 10.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A frozen soil subgrade thermal rod rapid positioning device, characterized in that, The device includes a centering rod (1), a heat pipe (11), and a GPS handpiece (15). A first laser rangefinder (3), a second laser rangefinder (10), and a fixing sleeve (4) are respectively provided on the outer side of the centering rod (1). The first laser rangefinder (3) and the second laser rangefinder (10) are fixedly connected to the centering rod (1) through a fixing clamp (2) on one side. The inner ring of the fixing sleeve (4) is fixedly connected to the outer side of the centering rod (1). A spirit level (5) and a connecting mechanism (6) are respectively provided on the outer side of the fixing sleeve (4). A fixing mechanism (7) is provided on one side of the connecting mechanism (6). A support rod (12) is provided at the bottom of the fixing mechanism (7). An installation mechanism (8) is provided at the top of the centering rod (1). A GPS receiver (9) is provided at the top of the installation mechanism (8).

2. The frozen soil embankment thermal rod rapid positioning device according to claim 1, characterized in that, The connecting mechanism (6) includes a connecting block (601), which is fixedly connected to the outside of the fixing sleeve (4). Fixing blocks (602) are fixedly connected to both sides of the connecting block (601). A fixing bolt (603) is provided in the inner cavity of the fixing block (602), and a fixing seat (604) is threadedly connected to the outside of the fixing bolt (603).

3. The frozen ground embankment thermal rod rapid positioning device according to claim 2, characterized in that, A docking groove (13) is provided on one side of the connecting block (601), and a docking rod (14) is slidably connected to the inner cavity of the docking groove (13).

4. The frozen ground embankment thermal rod rapid positioning device according to claim 2, characterized in that, The fixing mechanism (7) includes a fixing plate (701), which is fixedly connected to one side of the connecting block (601). The inner cavity of the fixing plate (701) is rotatably fitted with a positive and negative threaded rod (702). The outer sides of the positive and negative threaded rod (702) are respectively threaded with a positive threaded block (703) and a negative threaded block (704). The outer sides of the positive threaded block (703) and the negative threaded block (704) are fixedly connected with a moving block (706). A limit block (705) is fixedly connected to one side of the fixing plate (701). A connecting plate (707) is rotatably fitted to one side of the limit block (705). The bottom of the connecting plate (707) is fixedly connected to the top of the support rod (12).

5. The frozen ground subgrade thermal rod rapid positioning device according to claim 1, characterized in that, The installation mechanism (8) includes an installation frame (801), which is fixedly connected to the top of the centering rod (1). The inner cavity of the installation frame (801) is slidably connected to an installation seat (802). The GPS receiver (9) is installed on the top of the installation seat (802). The inner cavity of the installation seat (802) is welded with a spring (803), and one end of the spring (803) is welded with a locking block (804).

6. The frozen ground embankment thermal rod rapid positioning device according to claim 5, characterized in that, The installation mechanism (8) further includes a limiting sleeve (805), which is fixedly connected to the inner cavity of the mounting base (802). A limiting rod (806) is fixedly connected to the inner cavity of the limiting sleeve (805), and the outer side of the limiting rod (806) is welded to the inner cavity of the locking block (804).

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