Experimental device capable of realizing two-way water replenishing freezing and thawing circulation

Abstract

The invention discloses an experimental device capable of achieving two-way water replenishing and freeze thawing circulation, and relates to the technical field of water replenishing and freeze thawing circulation experiments.The experimental device capable of achieving two-way water replenishing and freeze thawing circulation comprises a tank body, an upper fixing plate is arranged at the upper end of the tank body, and a top temperature control and water replenishing device is installed at the center of the upper fixing plate; according to the scheme, the problems that an existing indoor test device mostly adopts a Markov bottle to replenish water from the lower portion of a soil body, but the method is difficult to simulate the surface water infiltration condition, in the actual environment, surface water infiltration is an important way for soil body water replenishment, and especially during rainfall, snow melting or irrigation, the soil body water replenishment is difficult to simulate are solved. In the prior art, surface water permeates into the soil body and acts together with underground water to influence the moisture distribution and freeze thawing behavior of the soil body, so that the traditional one-way water replenishing method has obvious defects and cannot comprehensively reflect the real freeze thawing process of the soil body in the cold region in an open system.

Description

Technical Field

[0001] The invention relates to the technical field of water replenishment freeze-thaw cycle experiments, in particular to an experimental device capable of realizing a two-way water replenishment freeze-thaw cycle. Background Art

[0002] The water-replenishing freeze-thaw cycle test is an experiment used to study the performance changes of materials after freeze-thaw cycles under water-replenishing conditions. It is usually used to evaluate the reliability and durability of materials in cold regions or in applications involving the interaction between water and materials.

[0003] For example, the Chinese authorized patent with announcement number CN203224406U (a unidirectional freeze-thaw cycle triaxial apparatus): includes a pressure chamber, a mainframe, a stable air pressure source, a temperature control system, a water supply device, and a test and data acquisition system. The pressure chamber includes an external pressure chamber and an internal pressure chamber. The upper part of the internal pressure chamber is provided with a sample cap consisting of a sample cap upper box and a sample cap lower box, and the bottom of the pressure chamber is provided with a base consisting of a base upper box and a base lower box; the sample cap, the base and the external pressure chamber are respectively connected to the refrigerator through insulation pipelines; the upper part of the pressure chamber is provided with a load transmission shaft, which passes through the upper cover of the pressure chamber and acts on the sample cap upper box; the base of the pressure chamber is connected to the water supply device through a pipeline; the mainframe provides power to realize sample shearing, and the temperature sensor on the refrigerator and the displacement sensor and load sensor on the mainframe are connected to the test and data acquisition system. The utility model can realize a unidirectional freeze-thaw cycle test under low temperature water supply conditions, and simultaneously test the triaxial strength test under freeze-thaw cycle conditions.

[0004] However, existing indoor test devices mostly use Martens flasks to replenish water from the bottom of the soil, but this method is difficult to simulate the situation of surface water infiltration. In the actual environment, surface water infiltration is an important way to replenish soil water, especially during rainfall, snowmelt or irrigation, surface water will penetrate into the soil and interact with groundwater to affect the moisture distribution and freeze-thaw behavior of the soil. Therefore, the traditional one-way water replenishment method has obvious shortcomings and cannot fully reflect the real freeze-thaw process of cold-region soil in an open system. This limitation makes it difficult for researchers to accurately predict and control the impact of freeze-thaw cycles on soil, increasing the difficulty and risk of engineering design and construction; therefore, it does not meet the existing needs. In this regard, we propose an experimental device that can realize two-way water replenishment freeze-thaw cycles. Summary of the invention

[0005] The purpose of the present invention is to provide an experimental device that can realize two-way water replenishment freeze-thaw cycle, so as to solve the problem that the existing indoor test devices proposed in the above background technology mostly use Martens flasks to replenish water from below the soil, but this method is difficult to simulate the situation of surface water infiltration. In the actual environment, surface water infiltration is an important way to replenish soil water. Especially during rainfall, snowmelt or irrigation, surface water will penetrate into the soil and work together with groundwater to affect the moisture distribution and freeze-thaw behavior of the soil. Therefore, the traditional unidirectional water replenishment method has obvious shortcomings and cannot fully reflect the real freeze-thaw process of cold zone soil in an open system. This limitation makes it difficult for researchers to accurately predict and control the impact of freeze-thaw cycles on the soil, increasing the difficulty and risk of engineering design and construction.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an experimental device capable of realizing a two-way water replenishment freeze-thaw cycle, comprising: a tank body, an upper fixed plate is arranged at the upper end of the tank body, a top temperature control and water replenishment device is installed at the center of the upper fixed plate, a bottom temperature control and water replenishment device is installed at the bottom of the tank body, a support rod is arranged between the corners of the upper fixed plate and the bottom temperature control and water replenishment device, the tank body comprises a first side tank and a second side tank, and the first side tank and the second side tank are installed oppositely, and a through cavity is arranged inside the first side tank and the second side tank.

[0007] Preferably, both side surfaces of the first side tank are provided with limiting grooves, both side surfaces of the second side tank are provided with limiting seats, and the limiting seats are inserted into the limiting grooves, and one side surface of the limiting groove is provided with a sealing notch, and a sealing rubber strip is embedded in the sealing notch.

[0008] Preferably, the other surfaces on both sides of the first side tank and the second side tank are provided with screw holes, the rear surface of the second side tank is provided with mounting holes, and the mounting holes are provided in three groups and arranged in a spiral shape.

[0009] Preferably, the top temperature control and water replenishment device includes a top water inlet and outlet plate and a top temperature control plate, and the top water inlet and outlet plate is located above the top temperature control plate, and the top temperature control plate is located below the upper fixed plate.

[0010] Preferably, a top water outlet is provided on the surface of a corner of the top water inlet and outlet plate and the top temperature control plate, a top water inlet is provided on one side of the top water outlet, a top liquid inlet hole is provided on the surface of another corner of the top water inlet and outlet plate and the top temperature control plate, a top liquid outlet is provided on one side of the top liquid inlet hole, and a top cooling liquid channel is provided on one end of the top liquid inlet hole and the top liquid outlet hole of the top temperature control plate.

[0011] Preferably, the top temperature control and water replenishment device also includes a permeable stone and a side enclosure, and the permeable stone is located below the top temperature control plate, and the side enclosure assembles the top water inlet and outlet plate, the top temperature control plate and the permeable stone, and the inner wall of the side enclosure is provided with a connecting inner plate.

[0012] Preferably, the bottom temperature control and water replenishment device includes a filter plate, a bottom temperature control plate, a sleeve plate and a lower fixed plate, and the filter plate is located on the top of the bottom temperature control plate, the sleeve plate is sleeved on the outside of the bottom temperature control plate, and the lower fixed plate is located at the bottom of the sleeve plate, and the upper surface of the lower fixed plate is provided with an inner groove.

[0013] Preferably, the bottom temperature control plate and the upper surface of one corner of the inner groove are both provided with a bottom water inlet, a bottom water outlet is provided on one side of the bottom water inlet, the upper surface of the other corner of the inner groove and the lower surface of the other corner of the bottom temperature control plate are both provided with a bottom liquid inlet hole, a bottom liquid outlet hole is provided on one side of the bottom liquid inlet hole, and one end of the bottom liquid inlet hole and the bottom liquid outlet hole are both provided with a bottom cold liquid channel.

[0014] Preferably, a connecting slot is provided on the upper surface of the sleeve plate, a baffle is provided on the upper surface at the center of the connecting slot, a stabilizing inner plate is provided on the inner wall of the empty slot at the center of the connecting slot, and bolt holes are provided on the edge surfaces of the stabilizing inner plate, inner groove, bottom temperature control plate, top temperature control plate and top water inlet and outlet plates.

[0015] Preferably, a quick-release plane is provided on one side surface of the support rod, connecting threads are provided on the outer walls at both ends of the support rod, rod holes are provided on the corner surfaces of the lower fixing plate and the upper fixing plate, and the support rod passes through the rod holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention is provided with a top temperature-controlled water replenishment device and a bottom temperature-controlled water replenishment device for two-way water replenishment. The top water inlet and the top water outlet are responsible for water inlet and outlet. The soil below is replenished with water through the permeable stone. The top liquid inlet and the top liquid outlet facilitate the inlet and outlet of cold liquid. The cold liquid circulates through the top cold liquid channel to control the temperature of the soil below. The soil above can be replenished with water through the bottom water inlet and the bottom water outlet. The cold liquid circulates in the bottom cold liquid channel by relying on the bottom liquid inlet and the bottom liquid outlet. The cold liquid can work together with the bottom temperature control plate to perform a cold bath cycle, thereby realizing a two-way water replenishment operation. Not only can water be replenished from below the soil, but also the surface water infiltration can be simulated through the top infiltration device to truly reflect the water migration process under natural conditions. This design overcomes the limitations of the traditional one-way water replenishment method and can more accurately study the water content of the soil in the freeze-thaw cycle. The changes in distribution and structural stability provide a more reliable research method for engineering construction, environmental protection and climate change response in cold regions, which is helpful to improve the durability and safety of infrastructure in cold regions. It solves the problem that most existing indoor test devices use Martensitic flasks to replenish water from under the soil, but this method is difficult to simulate surface water infiltration. In actual environments, surface water infiltration is an important way to replenish soil water, especially during rainfall, snowmelt or irrigation. Surface water will penetrate into the soil and work together with groundwater to affect the moisture distribution and freeze-thaw behavior of the soil. Therefore, the traditional one-way water replenishment method has obvious shortcomings and cannot fully reflect the actual freeze-thaw process of cold-region soil in an open system. This limitation makes it difficult for researchers to accurately predict and control the impact of freeze-thaw cycles on the soil, increasing the difficulty and risk of engineering design and construction.

[0018] (2) The tank body is respectively a first side tank and a second side tank, and the first side tank and the second side tank are assembled, the limit seat is inserted into the limit groove to improve the connection stability, and a sealing rubber strip is embedded in the sealing groove to improve the sealing performance of the connection between the first side tank and the second side tank. The support rod passes through the rod hole to connect the tank body, the upper fixing plate, the top temperature control and water supply device and the bottom temperature control and water supply device, thereby realizing the tank body can be disassembled and replaced, and improving flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the tank structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the side surface structure of the first side tank of the present invention;

[0022] Figure 4 It is a schematic diagram of the rear surface structure of the second side tank of the present invention;

[0023] Figure 5This is a schematic diagram of the top water inlet and outlet plate of the present invention from a top view;

[0024] Figure 6 It is a schematic diagram of the structure of the top temperature control plate of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the permeable stone of the present invention;

[0026] Figure 8 It is a schematic diagram of the side enclosure structure of the present invention;

[0027] Fig. 9 It is a schematic structural diagram of the bottom temperature control and water replenishment device of the present invention;

[0028] Fig.10 It is a schematic diagram of the top view of the bottom temperature control plate of the present invention;

[0029] Fig.11 This is a schematic diagram of the bottom temperature control plate of the present invention when viewed from above;

[0030] Fig.12 A schematic diagram of the top view of the sleeve plate of the present invention;

[0031] Fig.13 It is a schematic diagram of the structure of the sleeve plate of the present invention when viewed from the bottom;

[0032] Fig.14 It is a schematic diagram of the structure of the lower fixing plate of the present invention;

[0033] In the figure: 1, tank body; 2, upper fixing plate; 3, top temperature control and water supply device; 4, bottom temperature control and water supply device; 5, support rod; 6, first side tank; 7, second side tank; 8, screw hole; 9, through cavity; 10, limit groove; 11, sealing notch; 12, limit seat; 13, mounting hole; 14, top water inlet and outlet plate; 15, top water inlet; 16, top water outlet; 17, top liquid inlet hole; 18, top liquid outlet hole; 19, bolt hole; 20, top control Temperature plate; 21. Top cooling liquid channel; 22. Permeable stone; 23. Side enclosure; 24. Connecting inner plate; 25. Connecting slot; 26. Sleeve plate; 27. Filter plate; 28. Bottom temperature control plate; 29. ​​Bottom water inlet; 30. Bottom water outlet; 31. Bottom liquid inlet hole; 32. Bottom liquid outlet hole; 33. Bottom cooling liquid channel; 34. Baffle; 35. Stabilizing inner plate; 36. Inner groove; 37. Connecting thread; 38. Rod hole; 39. Lower fixing plate; 40. Quick-release plane. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] See also Figure 1-14 An embodiment of the present invention is as follows: an experimental device capable of realizing a two-way water replenishment freeze-thaw cycle, comprising: a tank body 1, an upper fixed plate 2 is arranged at the upper end of the tank body 1, a top temperature control and water replenishment device 3 is installed at the center of the upper fixed plate 2, a bottom temperature control and water replenishment device 4 is installed at the bottom of the tank body 1, a support rod 5 is arranged between the corners of the upper fixed plate 2 and the bottom temperature control and water replenishment device 4, the tank body 1 comprises a first side tank 6 and a second side tank 7, and the first side tank 6 and the second side tank 7 are oppositely installed, and the first side tank 6 and the second side tank 7 are both arranged inside There is a through cavity 9, both side surfaces of the first side tank 6 are provided with limiting grooves 10, both side surfaces of the second side tank 7 are provided with limiting seats 12, and the limiting seats 12 are inserted into the limiting grooves 10, and one side surface of the limiting groove 10 is provided with a sealing notch 11, and a sealing rubber strip is embedded in the sealing notch 11. The first side tank 6 and the second side tank 7 are assembled, and the limiting seat 12 is inserted into the limiting groove 10 to improve the connection stability, and the sealing rubber strip is embedded in the sealing notch 11 to improve the connection sealing performance of the first side tank 6 and the second side tank 7;

[0036] The other surfaces of both sides of the first side tank 6 and the second side tank 7 are provided with screw holes 8, and the rear surface of the second side tank 7 is provided with mounting holes 13, and the mounting holes 13 are provided in three groups and are arranged in a spiral shape. This design can effectively reduce the influence of boundary conditions and can be used to place three different types of sensors. The top temperature control and water replenishment device 3 includes a top water inlet and outlet plate 14 and a top temperature control plate 20, and the top water inlet and outlet plate 14 is located above the top temperature control plate 20, and the top temperature control plate 20 is located below the upper fixing plate 2, and one of the top water inlet and outlet plate 14 and the top temperature control plate 20 A top water outlet 16 is provided on the surface of the corner, a top water inlet 15 is provided on one side of the top water outlet 16, a top liquid inlet hole 17 is provided on the surface of the other corner of the top water inlet and outlet plate 14 and the top temperature control plate 20, a top liquid outlet hole 18 is provided on one side of the top liquid inlet hole 17, a top cooling liquid channel 21 is provided at one end of the top liquid inlet hole 17 and the top liquid outlet hole 18 of the top temperature control plate 20, and the top temperature control water replenishment device 3 also includes a permeable stone 22 and a side enclosure 23, and the permeable stone 22 is located below the top temperature control plate 20, and the side enclosure 23 is opposite to the top water inlet and outlet plate 14. , the top temperature control plate 20 and the permeable stone 22 are assembled, the inner wall of the side enclosure 23 is provided with a connecting inner plate 24, the bottom temperature control and water replenishing device 4 includes a filter plate 27, a bottom temperature control plate 28, a sleeve plate 26 and a lower fixed plate 39, and the filter plate 27 is located at the top of the bottom temperature control plate 28, the sleeve plate 26 is sleeved on the outside of the bottom temperature control plate 28, and the lower fixed plate 39 is located at the bottom of the sleeve plate 26, and the upper surface of the lower fixed plate 39 is provided with an inner groove 36, and the upper surface of the bottom temperature control plate 28 and a corner of the inner groove 36 are both provided with a bottom water inlet 29, and one side of the bottom water inlet 29 is provided with a bottom outlet The water inlet 30, the upper surface of the other corner of the inner groove 36 and the lower surface of the other corner of the bottom temperature control plate 28 are all provided with a bottom liquid inlet hole 31, and a bottom liquid outlet hole 32 is provided on one side of the bottom liquid inlet hole 31. One end of the bottom liquid inlet hole 31 and the bottom liquid outlet hole 32 are both provided with a bottom cooling liquid channel 33, which is responsible for water in and out through the top water inlet 15 and the top water outlet 16, and the soil below is replenished with water through the permeable stone 22, and the cooling liquid is convenient for entering and exiting through the top liquid inlet hole 17 and the top liquid outlet hole 18, and circulates through the top cooling liquid channel 21 to control the temperature of the soil below;

[0037] Water can be replenished to the upper soil through the bottom water inlet 29 and the bottom water outlet 30, and circulates in the bottom cooling liquid channel 33 through the bottom liquid inlet hole 31 and the bottom liquid outlet hole 32, and can work together with the bottom temperature control plate 28 to perform cold bath circulation, thereby realizing a two-way water replenishment operation.

[0038] Furthermore, a connecting slot 25 is provided on the upper surface of the sleeve plate 26, a baffle 34 is provided on the upper surface at the center of the connecting slot 25, and a stabilizing inner plate 35 is provided on the inner wall of the empty slot at the center of the connecting slot 25. Bolt holes 19 are provided on the edge surfaces of the stabilizing inner plate 35, the inner groove 36, the bottom temperature control plate 28, the top temperature control plate 20 and the top water inlet and outlet plate 14. External bolts are connected through the bolt holes 19 to facilitate fixation between adjacent structures. The first side tank 6 and the second side tank 7 are inserted into the connecting slot 25 to improve the stability of the connection with the sleeve plate 26 and prevent it from being easily displaced. Rod holes 38 are provided on the corner surfaces of the lower fixing plate 39 and the upper fixing plate 2, and the support rod 5 passes through the rod hole 38 to connect the tank body 1, the upper fixing plate 2, the top temperature control and water replenishment device 3 and the bottom temperature control and water replenishment device 4. Except for the permeable stone 22, the top temperature control and water replenishment device 3 is made of stainless steel, which is not easily corroded and damaged, thereby improving the service life.

[0039] It is further introduced that a quick-release plane 40 is provided on one side surface of the support rod 5, and connecting threads 37 are provided on the outer walls at both ends of the support rod 5. The quick-release plane 40 is used to facilitate the application of force to move the support rod 5, thereby facilitating quick disassembly. In addition, the support rod 5 is made of stainless steel, which is not easy to be corroded and damaged, thereby increasing the service life.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle, comprising a tank body (1), characterized in that: An upper fixing plate (2) is provided at the upper end of the tank body (1), a top temperature control and water replenishing device (3) is installed at the center of the upper fixing plate (2), a bottom temperature control and water replenishing device (4) is installed at the bottom of the tank body (1), a support rod (5) is provided between the corners of the upper fixing plate (2) and the bottom temperature control and water replenishing device (4), the tank body (1) comprises a first side tank (6) and a second side tank (7), and the first side tank (6) and the second side tank (7) are installed opposite to each other, and a through cavity (9) is provided inside each of the first side tank (6) and the second side tank (7).

2. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 1, characterized in that: Both side surfaces of the first side tank (6) are provided with limiting grooves (10), and both side surfaces of the second side tank (7) are provided with limiting seats (12), and the limiting seats (12) are inserted into the limiting grooves (10). One side surface of the limiting groove (10) is provided with a sealing notch (11), and a sealing rubber strip is embedded in the sealing notch (11).

3. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 1, characterized in that: The other surfaces on both sides of the first side tank (6) and the second side tank (7) are provided with screw holes (8), and the rear surface of the second side tank (7) is provided with mounting holes (13), and the mounting holes (13) are provided in three groups and arranged in a spiral shape.

4. The experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 1, characterized in that: The top temperature control and water replenishment device (3) comprises a top water inlet and outlet plate (14) and a top temperature control plate (20), wherein the top water inlet and outlet plate (14) is located above the top temperature control plate (20), and the top temperature control plate (20) is located below the upper fixed plate (2).

5. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 4, characterized in that: A top water outlet (16) is provided on the surface of a corner of the top water inlet and outlet plate (14) and the top temperature control plate (20), a top water inlet (15) is provided on one side of the top water outlet (16), a top liquid inlet hole (17) is provided on the surface of another corner of the top water inlet and outlet plate (14) and the top temperature control plate (20), a top liquid outlet hole (18) is provided on one side of the top liquid inlet hole (17), and a top cooling liquid channel (21) is provided on one end of the top liquid inlet hole (17) and the top liquid outlet hole (18) of the top temperature control plate (20).

6. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 5, characterized in that: The top temperature control and water replenishment device (3) further comprises a permeable stone (22) and a side enclosure (23), wherein the permeable stone (22) is located below the top temperature control plate (20), and the side enclosure (23) assembles the top water inlet and outlet plate (14), the top temperature control plate (20) and the permeable stone (22), and the inner wall of the side enclosure (23) is provided with a connecting inner plate (24).

7. An experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 6, characterized in that: The bottom temperature control and water replenishing device (4) comprises a filter plate (27), a bottom temperature control plate (28), a sleeve plate (26) and a lower fixed plate (39), wherein the filter plate (27) is located on the top of the bottom temperature control plate (28), the sleeve plate (26) is sleeved on the outside of the bottom temperature control plate (28), and the lower fixed plate (39) is located at the bottom of the sleeve plate (26), and an inner groove (36) is provided on the upper surface of the lower fixed plate (39).

8. The experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 7, characterized in that: The bottom temperature control plate (28) and the upper surface of one corner of the inner groove (36) are both provided with a bottom water inlet (29), a bottom water outlet (30) is provided on one side of the bottom water inlet (29), the upper surface of the other corner of the inner groove (36) and the lower surface of the other corner of the bottom temperature control plate (28) are both provided with a bottom liquid inlet hole (31), a bottom liquid outlet hole (32) is provided on one side of the bottom liquid inlet hole (31), and a bottom cold liquid channel (33) is provided at one end of each of the bottom liquid inlet hole (31) and the bottom liquid outlet hole (32).

9. The experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 8, characterized in that: The upper surface of the sleeve plate (26) is provided with a connection slot (25), the upper surface at the center of the connection slot (25) is provided with a baffle (34), the inner wall of the empty slot at the center of the connection slot (25) is provided with a stabilizing inner plate (35), and the edge surfaces of the stabilizing inner plate (35), the inner groove (36), the bottom temperature control plate (28), the top temperature control plate (20) and the top water inlet and outlet plate (14) are all provided with bolt holes (19).

10. The experimental device capable of realizing a two-way water replenishment freeze-thaw cycle according to claim 7, characterized in that: A quick-release plane (40) is provided on one side surface of the support rod (5), connecting threads (37) are provided on the outer walls at both ends of the support rod (5), and rod holes (38) are provided on the corner surfaces of the lower fixing plate (39) and the upper fixing plate (2), and the support rod (5) passes through the rod holes (38).

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