Multi-factor climate temperature control box

Abstract

The present application relates to temperature control box technical field, provide a kind of multi-factor climate temperature control box, comprising: lower box and upper box, the top of the upper box is fixedly connected with glass box, one side of the lower box is provided with side door, the other side of the lower box is provided with cold and hot component unit, the outer surface of the lower box is also provided with pipeline placement unit, pipeline placement unit includes multiple rotating discs corresponding to different pipe diameters and installation heights, and the limit rotation column driven by electric cylinder realizes quick positioning, double locking and side wall integrated sealing of pipeline, cold and hot component uses lifting type cold plate and hot plate structure integrated with bottom water replenishment, to form stable vertical temperature gradient. The present application can quickly switch operating conditions without disassembling box or refilling soil, and the temperature field is stable, suitable for pile foundation, buried pipeline freeze-thaw test.

Description

Technical Field

[0001] This invention relates to the field of temperature control box technology, and in particular to a multi-factor climate temperature control box. Background Technology

[0002] In the field of geotechnical engineering in cold regions, frost heave and thaw settlement failure of underground structures such as buried pipelines and pile foundations is a core issue affecting the safety and service life of these projects. Indoor model freeze-thaw tests are a key means to study their failure mechanisms and verify anti-freeze design schemes. During the test, the installation height of pipelines and pile foundations is a core parameter that directly affects the distribution of frost heave force and deformation patterns. It needs to be precisely adjusted according to different engineering conditions to simulate the service conditions of structures at different burial depths in actual projects.

[0003] The existing freeze-thaw test chambers have obvious defects in the pipe installation height adjustment: traditional equipment mostly uses the method of fixing the opening on the side wall of the chamber. One opening corresponds to a single fixed height. If the burial depth needs to be adjusted, it is necessary to re-drill holes in the side wall of the chamber or replace the special flange. The process is cumbersome and will damage the insulation structure of the chamber. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that adjusting the burial depth of traditional control boxes is cumbersome and will damage the insulation structure of the box, and to provide a multi-factor climate temperature control box.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a multi-factor climate temperature control box, including: a lower box and an upper box, a glass box is fixedly connected to the top of the upper box, a side door is provided on one side of the lower box, a cold and hot component unit is provided on the other side of the lower box, and a pipe placement unit is also provided on the outer surface of the lower box. The pipe placement unit includes a first support block, a second electric cylinder is fixedly connected inside the first support block, a second terminal is provided on the second electric cylinder, a second telescopic end is also provided on the outer surface of the second electric cylinder, a support plate is fixedly connected to the end of the second telescopic end away from the second electric cylinder, a limited rotating column is fixedly connected to the outer surface of the support plate, and a placement component is also provided in the middle of the first support block. The placement assembly includes a top cover, and the bottom of the top cover is provided with multiple sets of connected rotating disks. Adjacent rotating disks are rotatably connected to each other. The rotating disks are provided with placement holes and rotation limiting holes. The placement holes and insertion holes are both adapted to the outer diameter of pile foundations and test pipelines within the range of 100mm-140mm. The top of the rotating disks is also provided with adjustment grooves for manually rotating the disks.

[0006] Preferably, the outer surface of the first support block is fixedly connected to the outer surface of the lower housing, and the top of the top cover is fixedly connected to the outer surface of the first support block.

[0007] Preferably, the pipe placement unit further includes a second support block, the outer surface of which is provided with an embedding hole.

[0008] Preferably, the second support block is located on the side of the lower box away from the first support block, the embedding hole and the placement hole are adapted to the size of the pile foundation and pipeline hole, the rotation limiting hole is adapted to the diameter of the rotation limiting column hole, and the diameter of the placement hole is larger than the diameter of the rotation limiting hole.

[0009] Preferably, the heating and cooling component unit includes a side plate, a motor is fixedly connected to the top of the side plate, a ball screw is fixedly connected to the output end of the motor, the bottom end of the ball screw is rotatably connected to the bottom inner wall of the side plate, a nut platform is threadedly connected to the outer surface of the ball screw, an isolation curtain is fixedly connected to the upper and lower ends of the nut platform, a guide rod is also fixedly connected to the inner wall of the side plate, a cold plate structure is fixedly connected to the outer surface of the nut platform, and a coolant inlet pipe is provided at the top of the cold plate structure.

[0010] Preferably, the outer surface of the side plate is fixedly connected to the end of the lower housing away from the side door, the inner wall of the nut platform is slidably connected to the outer surface of the guide rod, and the end of the isolation curtain away from the nut platform is fixedly connected to the inner wall of the side plate.

[0011] Preferably, the heating and cooling component unit further includes a hot plate structure, which is fixedly connected to the bottom of the side plate. A hot liquid inlet pipe is provided on the outer surface of the hot plate structure, and a water supply plate is provided on the top of the hot plate structure. A water supply pipe is fixedly connected to the outer surface of the water supply plate.

[0012] Preferably, a first electric cylinder is provided on the inner wall of the lower housing frame, a first wiring terminal is provided on the outer surface of the first electric cylinder, a first telescopic end is provided on the top of the first electric cylinder, and the top of the first telescopic end is fixedly connected to the bottom of the upper housing.

[0013] The beneficial effects of this invention are as follows: (1) This pipeline placement unit is designed with a multi-specification rotating disc and a rotation-limiting column locking and sealing integrated design. It can quickly complete the adjustment of the pipeline pre-embedding depth without disassembling the box, replacing the seals or refilling the soil, which greatly shortens the test preparation cycle.

[0014] (2) The adjustable cold plate structure can always fit the soil surface, so the depth of the pre-embedded part can be changed during the experiment, which simplifies the equipment operation process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0016] Figure 2This is a cross-sectional view of the structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the pipe placement unit of the present invention.

[0018] Figure 4 This is a cross-sectional view of the pipe placement unit of the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the component placement in this invention.

[0020] Figure 6 This is a schematic diagram of the structure of the heating and cooling component unit of the present invention.

[0021] In the diagram: 1. Lower housing; 2. Upper housing; 3. Glass housing; 4. Side door; 5. Pipe placement unit; 6. Hot and cold component unit; 7. Socket hole; 8. First electric cylinder; 9. First terminal block; 10. First telescopic end; 51. First support block; 52. Second support block; 53. Embedded hole; 54. Second electric cylinder; 55. Support plate; 56. Second terminal block; 57. Second telescopic end; 58. Rotation limit post; 59. Placement component; 591. Top cover; 592. Rotating circular plate; 593. Placement hole; 594. Rotation limit hole; 595. Adjustment groove; 61. Side plate; 62. Motor; 63. Ball screw; 64. Nut platform; 65. Guide rod; 66. Isolation curtain; 67. Cold plate structure; 68. Cold liquid inlet pipe; 69. Hot plate structure; 610. Hot liquid inlet pipe; 611. Water replenishment plate; 612. Water inlet pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the further embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] Example 1, such as Figures 1-2 As shown, the multi-factor climate temperature control box includes a lower box 1 and an upper box 2, which are divided into upper and lower sections. A glass box 3 is fixedly connected to the top of the upper box 2. A side door 4 is provided on one side of the lower box 1. A heating and cooling component unit 6 is provided on the other side of the lower box 1. A pipe placement unit 5 is also provided on the outer surface of the lower box 1. When the present invention is in operation, the pile foundation or buried pipeline used for the test is placed into the lower box 1 through the pipeline placement unit 5. Then, the side door 4 is opened and the operator enters the lower box 1 through the side door 4. The test soil is compacted to the set height in the cold and heat component unit 6. At the same time, the height of the cold and heat component unit 6 is adjusted. After the soil is filled, the cold and heat component unit 6 is connected to the external high and low temperature cold bath unit and the pressureless constant water level water tank. The freeze-thaw state of the soil, the development of ice lenses, and the deformation of piles / pipelines can be observed in real time through the glass box 3 on the top of the upper box 2.

[0024] A first electric cylinder 8 is installed on the inner wall of the frame of the lower housing 1. A first terminal 9 is installed on the outer surface of the first electric cylinder 8. A first telescopic end 10 is installed on the top of the first electric cylinder 8. The top of the first telescopic end 10 is fixedly connected to the bottom of the upper housing 2. The first electric cylinder 8 is connected to the control power supply through the first terminal 9. When the first electric cylinder 8 is started, the first telescopic end 10 of the first electric cylinder 8 extends upward smoothly, simultaneously lifting the upper housing 2 to its maximum stroke, so that the top opening of the lower housing 1 is fully opened, which facilitates further observation of the soil and pipeline conditions.

[0025] like Figures 3-4 As shown, the pipe placement unit 5 includes a first support block 51, a second electric cylinder 54 is fixedly connected inside the first support block 51, a second terminal block 56 is provided on the second electric cylinder 54, a second telescopic end 57 is also provided on the outer surface of the second electric cylinder 54, a support plate 55 is fixedly connected to the end of the second telescopic end 57 away from the second electric cylinder 54, a limited rotating column 58 is fixedly connected to the outer surface of the support plate 55, and a placement component 59 is also provided in the middle of the first support block 51. like Figure 5 As shown, the placement component 59 includes a top cover 591. The bottom of the top cover 591 is provided with multiple sets of interconnected rotating disks. Adjacent rotating disks are rotatably connected to each other. The rotating disks are provided with placement holes 593 and rotation limiting holes 594. The placement holes 593 and the insertion holes 53 are both adapted to the outer diameter of pile foundations and test pipelines within the range of 100mm-140mm (preferably 120mm). The top of the rotating disks is also provided with an adjustment groove 595 for manually rotating the disks.

[0026] The test pile or buried pipeline is placed into the lower box 1 through the pipeline placement unit 5. Specifically, before the test, the actual installation depth is simulated according to the placement height of the pile or pipeline used in this test. The adjustment groove 595 on the top of the rotating disc of the corresponding pipe diameter is manually held, and the disc is rotated around the central axis until the placement hole 593 in the center is completely coaxially aligned with the embedding hole 53 of the second support block 52. The placement holes 593 on the rotating discs at other heights are perpendicular to the embedding holes 53 of the second support block 52. One end of the test pipeline or pile is horizontally inserted from the outside of the first support block 51, passes through the aligned placement hole 593 and enters the lower box 1. The pipeline is pushed until the other end is inserted into the embedding hole 53 of the second support block 52, thus completing the placement of the pipeline at a specific height.

[0027] After determining the installation height of the pipeline, the control power is connected to the second electric cylinder 54 through the second terminal 56. The second electric cylinder 54 is started, and the second telescopic end 57 of the second electric cylinder 54 extends forward smoothly, pushing the end support plate 55 to move towards the rotating disk. The support plate 55 drives the fixed rotation limit post 58 to be inserted into the rotation limit hole 594 of the rotating disk where the pipeline is placed, thereby locking the pipeline in the horizontal and vertical directions. The remaining rotation limit post 58 will be inserted into the placement hole 593 of the remaining rotating disk, so that the lower box 1 is in a sealed state.

[0028] By utilizing the design of rotating discs layered to correspond to different installation heights and pipe diameters, the precise switching of pipelines and burial depths can be completed quickly without refilling the soil, significantly shortening the test preparation cycle. At the same time, the rotation limit column 58 is inserted into the rotation limit hole 594 of the target disc to achieve dual locking of the pipeline in both horizontal and vertical directions, preventing the pipeline from shifting or shaking due to soil frost heave and thaw settlement during the test, and ensuring the accuracy of the stress and deformation data of the pile foundation and pipeline.

[0029] The outer surface of the first support block 51 is fixedly connected to the outer surface of the lower housing 1, and the top of the top cover 591 is fixedly connected to the outer surface of the first support block 51.

[0030] The pipe placement unit 5 also includes a second support block 52, and the outer surface of the second support block 52 is provided with an embedding hole 53.

[0031] The second support block 52 is located on the side of the lower box 1 away from the first support block 51. The embedding hole 53 and the placement hole 593 are both adapted to the size of the pile foundation and pipeline hole. The rotation limiting hole 594 is adapted to the hole diameter of the rotation limiting column 58. The hole diameter of the placement hole 593 is larger than the hole diameter of the rotation limiting hole 594.

[0032] Example 2, as follows Figure 6 As shown, the heating and cooling component unit 6 includes a side plate 61. A motor 62 is fixedly connected to the top of the side plate 61. A ball screw 63 is fixedly connected to the output end of the motor 62. The bottom end of the ball screw 63 is rotatably connected to the bottom inner wall of the side plate 61. A nut platform 64 is threadedly connected to the outer surface of the ball screw 63. An isolation curtain 66 is fixedly connected to the upper and lower ends of the nut platform 64. The isolation curtain 66 is used to isolate the soil and block the convection exchange between the hot and cold air inside the box and the outside, preventing the leakage of heat and cold from affecting the stability of the temperature field. A guide rod 65 is also fixedly connected to the inner wall of the side plate 61. A cold plate structure 67 is fixedly connected to the outer surface of the nut platform 64. The cold plate structure 67 is made of an integral aluminum plate and is insulated with epoxy resin board on the outside. The liquid inlet pipe is made of copper pipe with a diameter of 8mm. A cold liquid inlet pipe 68 is provided at the top of the cold plate structure 67.

[0033] After the pipeline is installed and locked, the operator opens the side door 4 of the lower box 1 and enters the box. First, the bottom layer of test soil is compacted in layers above the water replenishment plate 611 of the hot and cold component unit 6 to the set burial depth of the pipeline. After confirming that the pipeline is horizontal and without deviation, the upper layer of soil is compacted in layers to the total set height. The soil surface is leveled, and then the motor 62 on the top of the side plate 61 is started. The motor 62 drives the ball screw 63 to rotate in the forward direction, which drives the nut platform 64 to slide vertically downward smoothly along the guide rod 65. At the same time, the cold plate structure 67 is moved downward until the bottom surface of the cold plate structure 67 is completely and tightly attached to the upper surface of the test soil. The motor 62 stops running and self-locks.

[0034] The outer surface of the side panel 61 is fixedly connected to the end of the lower housing 1 away from the side door 4, the inner wall of the nut platform 64 is slidably connected to the outer surface of the guide rod 65, and the end of the isolation curtain 66 away from the nut platform 64 is fixedly connected to the inner wall of the side panel 61.

[0035] The heating and cooling component unit 6 also includes a hot plate structure 69. The hot plate is made of an integral aluminum plate and is covered with epoxy resin board for pressure and heat insulation. The liquid inlet pipe is made of copper pipe with a diameter of 8mm. The hot plate structure 69 is fixedly connected to the bottom of the side plate 61. The outer surface of the hot plate structure 69 is provided with a hot liquid inlet pipe 610. The top of the hot plate structure 69 is provided with a water supply plate 611. The water supply pipe is made of 20*10mm rectangular tube with a water supply hole spacing of 40mm. The outer surface of the water supply plate 611 is fixedly connected with a water inlet pipe 612.

[0036] After the soil filling and cold plate bonding are completed, connect the cold liquid inlet pipe 68 at the top of the cold plate structure 67 to the low-temperature circulation pipeline of the high and low temperature cooling bath unit. Connect the hot liquid inlet pipe 610 of the hot plate structure 69 to the constant temperature circulation pipeline of the same cooling bath unit. Connect the water inlet pipe 612 of the water supply plate 611 to a pressureless constant water level tank and adjust the water level in the tank to be flush with the water level inside the water supply plate 611. Start the high and low temperature cooling bath unit. The constant temperature heat exchange medium circulates inside the hot plate structure 69 through the hot liquid inlet pipe 610, keeping the top surface of the hot plate at the set temperature. The constant underground temperature (10℃) provides a stable one-dimensional thermal boundary for the bottom of the soil. The low-temperature heat exchange medium circulates inside the cold plate structure 67 through the cold liquid inlet pipe 68, maintaining the bottom surface of the cold plate at the set low surface temperature (-30℃), forming a stable vertical temperature gradient with the bottom hot plate. At the same time, the pressureless water supply valve of the water supply plate 611 is opened, and the pressureless water source in the water supply plate 611 migrates upward through capillary action under the drive of the soil temperature gradient, simulating the process of groundwater recharge and water migration in natural frozen soil.

[0037] When it is necessary to change the soil depth, first suspend the high and low temperature cooling bath unit and the water replenishment system. After the temperature inside the chamber returns to room temperature, start the motor 62 on the top of the side plate 61, drive the ball screw 63 to rotate in the opposite direction, and drive the nut platform 64 to slide vertically upward smoothly along the guide rod 65. At the same time, drive the cold plate structure 67 to rise to the height corresponding to the target soil depth. The motor 62 self-locks and fixes the position of the cold plate. Then open the side door 4 of the lower chamber 1. The operator adds test soil in layers on the surface of the original soil and compacts each layer until the total height of the soil reaches the set value. Level the soil surface, start the motor 62 again to drive the ball screw 63 to rotate in the forward direction, and drive the cold plate structure 67 to slowly descend until its bottom surface is completely and tightly attached to the upper surface of the newly added soil. The motor 62 self-locks again. Finally, restart the hot and cold cycle and water replenishment system to continue the freeze-thaw test.

[0038] This operating method eliminates the need to clear the original test soil or disassemble any internal structure. It allows for rapid and flexible adjustment of soil depth simply by raising and lowering the cold plate in conjunction with local soil addition. This significantly shortens the switching cycle between different burial depths, reduces waste of soil materials and labor costs, and ensures that the cold plate can be precisely adapted to the soil height, maintaining a tight fit with the soil surface. This prevents the cold plate from being suspended due to changes in soil depth, which could disrupt the vertical temperature gradient, or cause internal stress distortion due to excessive compression of the soil. Furthermore, it preserves the initial state of the original soil and any existing freeze-thaw damage. It allows for continuous comparative tests of the same soil at different burial depths, completely eliminating systematic errors caused by differences in the physical properties of different batches of soil, and significantly improving the comparability and scientific validity of multiple sets of control test data.

[0039] The working principle of this invention is as follows: By using a split-type lifting box with pipe placement unit 5, the installation, burial depth adjustment and integrated locking and sealing of pile foundations and pipelines of different diameters can be completed quickly. A stable vertical temperature gradient is formed by independently temperature-controlled hot and cold plates at the top and bottom. The bottom integrated water replenishment plate 611 provides pressureless and uniform water replenishment, simulating the temperature field of natural permafrost and the groundwater replenishment process. The freeze-thaw conditions in cold regions are accurately reproduced in a sealed test chamber, providing a standardized and controllable environment for the freeze-thaw performance testing of pile foundations and buried pipelines.

[0040] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, it can refer to a bolted connection, a welded connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-factor climate temperature control box, characterized in that, include: The lower box and the upper box are provided. A glass box is fixedly connected to the top of the upper box. A side door is provided on one side of the lower box. A heating and cooling component unit is provided on the other side of the lower box. A pipe placement unit is also provided on the outer surface of the lower box. The pipe placement unit includes a first support block, a second electric cylinder is fixedly connected inside the first support block, a second terminal is provided on the second electric cylinder, a second telescopic end is also provided on the outer surface of the second electric cylinder, a support plate is fixedly connected to the end of the second telescopic end away from the second electric cylinder, a limited rotating column is fixedly connected to the outer surface of the support plate, and a placement component is also provided in the middle of the first support block. The placement assembly includes a top cover, and the bottom of the top cover is provided with multiple sets of connected rotating disks. Adjacent rotating disks are rotatably connected to each other. The rotating disks are provided with placement holes and rotation limiting holes. The placement holes and insertion holes are both adapted to the outer diameter of pile foundations and test pipelines within the range of 100mm-140mm. The top of the rotating disks is also provided with adjustment grooves.

2. The multi-factor climate temperature control box according to claim 1, characterized in that: The outer surface of the first support block is fixedly connected to the outer surface of the lower box, and the top of the top cover is fixedly connected to the outer surface of the first support block.

3. The multi-factor climate temperature control box according to claim 1, characterized in that: The pipe placement unit also includes a second support block, the outer surface of which is provided with an embedding hole.

4. The multi-factor climate temperature control box according to claim 3, characterized in that: The second support block is located on the side of the lower box away from the first support block. The embedding hole and the placement hole are both adapted to the size of the pile foundation and pipeline hole. The rotation limiting hole is adapted to the diameter of the rotation limiting column hole. The diameter of the placement hole is larger than the diameter of the rotation limiting hole.

5. A multi-factor climate temperature control box according to claim 1, characterized in that: The heating and cooling component unit includes a side plate. A motor is fixedly connected to the top of the side plate. A ball screw is fixedly connected to the output end of the motor. The bottom end of the ball screw is rotatably connected to the bottom inner wall of the side plate. A nut platform is threadedly connected to the outer surface of the ball screw. Isolation curtains are fixedly connected to the upper and lower ends of the nut platform. A guide rod is also fixedly connected to the inner wall of the side plate. A cold plate structure is fixedly connected to the outer surface of the nut platform. A coolant inlet pipe is provided at the top of the cold plate structure.

6. A multi-factor climate temperature control box according to claim 5, characterized in that: The outer surface of the side panel is fixedly connected to the end of the lower housing away from the side door, the inner wall of the nut platform is slidably connected to the outer surface of the guide rod, and the end of the isolation curtain away from the nut platform is fixedly connected to the inner wall of the side panel.

7. A multi-factor climate temperature control box according to claim 1, characterized in that: The heating and cooling component unit also includes a hot plate structure, which is fixedly connected to the bottom of the side plate. A hot liquid inlet pipe is provided on the outer surface of the hot plate structure, and a water supply plate is provided on the top of the hot plate structure. A water inlet pipe is fixedly connected to the outer surface of the water supply plate.

8. A multi-factor climate temperature control box according to claim 1, characterized in that: The inner wall of the lower housing is provided with a first electric cylinder, the outer surface of the first electric cylinder is provided with a first wiring terminal, the top of the first electric cylinder is provided with a first telescopic end, and the top of the first telescopic end is fixedly connected to the bottom of the upper housing.

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