A device for detecting freeze-thaw resistance of anti-permeation concrete
The integrated anti-seepage and anti-freeze-thaw concrete testing device solves the problems of large space occupation and high cost in the existing technology, realizes multi-functional testing of concrete specimens, and reduces equipment requirements and maintenance complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING HUAIJIAN CONCRETE CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-07-07
AI Technical Summary
In the existing technology, the testing of impermeable and freeze-thaw resistant concrete requires two separate sets of equipment, which results in a large laboratory space occupation and high procurement and maintenance costs.
Design an integrated testing device for impermeable and freeze-thaw resistant concrete, comprising a frame, refrigeration equipment, a container, a water supply component, and a fixing component, to test the impermeability and freeze-thaw resistance of concrete specimens using the same device.
It enables the testing of the impermeability and freeze-thaw resistance of concrete specimens on the same equipment, reducing space occupation and cost, and simplifying the maintenance process.
Smart Images
Figure CN224471498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing device technology, and in particular to a testing device for impermeable and freeze-thaw resistant concrete. Background Technology
[0002] Concrete is a general term for engineering composite materials that bind aggregates together with cementing materials. Generally, the term "concrete" refers to cement concrete, which uses cement as the cementing material, sand and gravel as aggregates, and water (which may contain admixtures and additives) in a specific ratio, and is widely used in civil engineering. Impermeable and freeze-thaw resistant concrete is a specially designed type of concrete. By optimizing the material ratio and adding admixtures, its ability to resist moisture penetration and freeze-thaw cycle damage is significantly improved. It is widely used in projects with high durability requirements, such as those in extremely cold regions, hydraulic structures, bridges, and tunnels. During the construction of impermeable and freeze-thaw resistant concrete, specimens must be taken for impermeability and freeze-thaw resistance tests to evaluate its durability.
[0003] Currently, assessing the impermeability and freeze-thaw resistance of concrete typically requires two different testing devices to test these properties separately. These two sets of equipment need to be placed independently, resulting in a significant increase in laboratory space requirements. This is particularly problematic for small and medium-sized testing institutions with limited space. Furthermore, purchasing two separate sets of equipment not only means double the acquisition cost but also incurs redundant maintenance and training costs. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a device for testing impermeable and freeze-thaw resistant concrete.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a test device for impermeable and freeze-thaw resistant concrete, comprising a frame and a refrigeration device installed within the frame. A workbench is installed on the frame, and a container with an open top is installed on the workbench. The refrigeration device can freeze the material inside the container. A rubber ring is installed at the bottom of the container, and a circular hole is opened at the bottom of the container. A water supply component for supplying water to the circular hole is installed inside the frame. A lid is hinged to the top of the container, and a fixing component for fixing the lid is also installed on the container. A threaded rod is spirally installed on the lid. One end of the threaded rod is located on the lower side of the lid and is provided with a pressure plate, and the other end is located on the upper side of the lid and is provided with a rotating handle. Several guide rods are circumferentially arranged on the pressure plate, and guide holes are opened on the lid corresponding to the guide holes. The guide holes are slidably connected to the corresponding guide rods.
[0006] By adopting the above technical solution, a frame, refrigeration equipment, a container, a water supply component, a fixing component, and a pressure plate are set up. During concrete impermeability testing, the concrete specimen is first placed in the container, then the lid is closed and secured by the fixing component. The rotating handle then drives the threaded rod to rotate. Due to the restriction of the guide rod and guide hole, the pressure plate cannot rotate. As the threaded rod rotates, it drives the pressure plate to descend, pressing the concrete specimen downwards until the bottom of the specimen contacts the rubber ring. The water supply component is then activated, supplying high-pressure water into the container through a round hole. The rubber ring restricts the water flow to the bottom of the concrete specimen, allowing the water to seep upwards from the bottom, thus testing the concrete's impermeability. During concrete freeze-thaw resistance testing, the concrete specimen is first placed in the container, then the lid is closed. The water supply component then supplies water into the container, submerging the specimen. The refrigeration equipment then freezes the contents of the container, thus testing the concrete specimen's freeze-thaw resistance. One of these anti-permeability and freeze-thaw resistance concrete testing devices can test the impermeability and freeze-thaw resistance of concrete specimens respectively, and it occupies little space, making it easy to place and maintain.
[0007] Furthermore, the water supply assembly includes a high-pressure water pump installed in the frame. The input end of the high-pressure water pump is connected to an external water source, and the output end is provided with an output pipe. The end of the output pipe away from the high-pressure water pump is connected to a vertically arranged water pipe, which is connected to a circular hole.
[0008] By adopting the above technical solution, a high-pressure water pump and an output pipe are set up. The high-pressure water pump pumps water into the output pipe and water pipe, and then the water flows into the container through the round hole.
[0009] Furthermore, the water pipe is connected to an upwardly inclined pipe, the output pipe is connected to the end of the inclined pipe away from the water pipe, the lower end of the water pipe is connected to a drain pipe, the drain pipe is equipped with a drain valve, and the end of the water pipe near the round hole is equipped with a water inlet valve.
[0010] By adopting the above technical solution, and setting up an inclined pipe, a drain pipe, a drain valve, and a water inlet valve, during the freeze-thaw resistance test, the water inlet valve is in the open state and the drain valve is in the closed state during the water injection process into the container, allowing water to flow into the container through the output pipe, the inclined pipe, and the water pipe. To prevent the water pipe from rupturing due to the freezing and expansion of residual water in the water pipe during the freeze-thaw test, after the water injection is completed, the water inlet valve is closed and the drain valve is opened to drain the water from the water pipe and the inclined pipe.
[0011] Furthermore, the fixing component includes a mounting base disposed on the receiving bucket, two upright plates are disposed at intervals on the mounting base, and sliding holes are horizontally disposed on the upright plates. A sliding rod is slidably disposed in both sliding holes. A connecting block is disposed on the side of the bucket lid adjacent to the mounting base, and a connecting hole is opened on the connecting block. When part of the sliding rod is located in the connecting hole, the connecting block and the bucket lid are fixed.
[0012] By adopting the above technical solution, a mounting base, upright plate, sliding hole, sliding rod, and connecting hole are set. After the bucket lid is closed, the sliding rod is slid so that part of the rod body is located in the connecting hole, thus fixing the connecting block and the bucket lid.
[0013] Furthermore, a baffle is provided on the slide rod, and a compression spring is sleeved on the slide rod between the baffle and the upright plate away from the connecting block.
[0014] By adopting the above technical solution, a baffle and a compression spring are set up. The compression spring provides thrust to the baffle and the slide rod, ensuring the stability of the slide rod when it is fixed to the bucket lid in the connection hole.
[0015] Furthermore, the mounting base is also provided with a fixing plate, and the fixing plate has horizontal fixing holes arranged concentrically with the sliding holes and having the same diameter.
[0016] Furthermore, a filter screen is provided at the bottom of the container located at the circular hole.
[0017] In summary, this utility model has the following beneficial effects: In this application, a frame, refrigeration equipment, a container, a water supply component, a fixing component, and a pressure plate are provided. When testing the concrete's impermeability, the concrete specimen is first placed in the container, then the lid is closed and fixed using the fixing component. The rotating handle then drives the threaded rod to rotate. Due to the restriction of the guide rod and guide hole, the pressure plate cannot rotate. As the threaded rod rotates, it drives the pressure plate to descend, pressing the concrete specimen downwards so that the bottom of the concrete specimen abuts against the rubber ring. Then, the water supply component is activated, supplying high-pressure water into the container through a round hole. The rubber ring restricts the water flow to the bottom of the concrete specimen, allowing the water to seep upwards from the bottom, thus testing the concrete's impermeability. When testing the concrete's freeze-thaw resistance, the concrete specimen is first placed in the container, then the lid is closed. The water supply component then supplies water into the container, submerging the concrete specimen. The refrigeration equipment then freezes the contents of the container, thus testing the concrete specimen's freeze-thaw resistance. One of these anti-permeability and freeze-thaw resistance concrete testing devices can test the impermeability and freeze-thaw resistance of concrete specimens respectively, and it occupies little space, making it easy to place and maintain. Attached Figure Description
[0018] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the container bucket and water pipe according to an embodiment of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the container bucket according to an embodiment of this utility model;
[0021] Figure 4 This is a schematic diagram of the internal structure of the container bucket according to an embodiment of this utility model.
[0022] In the diagram: 10. Frame; 11. Refrigeration equipment; 12. Workbench; 20. Container tank; 21. Rubber ring; 22. Round hole; 23. Filter screen; 30. Water supply assembly; 31. High-pressure water pump; 32. Output pipe; 33. Water pipe; 34. Inclined pipe; 35. Drain pipe; 36. Drain valve; 37. Inlet valve; 40. Tank lid; 41. Threaded rod; 42. Pressure plate; 43. Rotating handle; 44. Guide rod; 50. Fixing assembly; 51. Mounting base; 52. Vertical plate; 53. Slide rod; 54. Connecting block; 55. Baffle; 56. Compression spring; 57. Fixing plate; 58. Fixing hole. Detailed Implementation
[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0024] like Figure 1-4As shown in the figure, this application discloses a testing device for impermeable and freeze-thaw resistant concrete, including a frame 10, a refrigeration device 11, a water supply component 30, a fixing component 50, and a pressure plate 42. The refrigeration device 11 is installed inside the frame 10, and a workbench 12 is installed on the frame 10. A receiving tank 20 with an open top is installed on the workbench 12. The refrigeration device 11 can freeze the material inside the receiving tank 20. A rubber ring 21 is installed at the bottom of the receiving tank 20, and a circular hole 22 is opened at the bottom of the receiving tank 20. The water supply component 30 is installed inside the frame 10 for supplying water into the circular hole 22. A tank cover 40 is hinged to the top of the receiving tank 20, and the fixing component 50 is installed on the receiving tank 20 for fixing the tank cover 40. During the freeze-thaw resistance test of concrete, the concrete specimen is first placed in the container 20, and then the lid 40 is placed on top. Next, the water supply component 30 supplies water into the container 20. Under the action of water pressure, the water flows into the container 20 from the gap between the concrete specimen and the rubber ring 21, so that the water submerges the concrete specimen. Then, the refrigeration equipment 11 freezes the material in the container 20, thereby testing the freeze-thaw resistance of the concrete specimen.
[0025] A threaded rod 41 is spirally provided on the lid 40. One end of the threaded rod 41 is located on the lower side of the lid 40 and is provided with a pressure plate 42, and the other end is located on the upper side of the lid 40 and is provided with a rotating handle 43. Several guide rods 44 are provided circumferentially on the pressure plate 42. Guide holes are opened on the lid 40 corresponding to the guide holes, and the guide holes are slidably connected to the corresponding guide rods 44. During concrete impermeability testing, the concrete specimen is first placed in the receiving container 20, then the container lid 40 is placed on top and secured with the fixing component 50. The rotating handle 43 then rotates the threaded rod 41. Due to the restriction of the guide rod 44 and guide hole, the pressure plate 42 cannot rotate. As the threaded rod 41 rotates, it drives the pressure plate 42 to descend, pressing the concrete specimen downwards until the bottom of the specimen contacts the rubber ring 21. The water supply component 30 is then activated, supplying high-pressure water into the receiving container 20 through the round hole 22. The rubber ring 21 restricts the water flow to the bottom of the concrete specimen, allowing the water to seep upwards from the bottom, thus testing the concrete's impermeability. One such impermeability and freeze-thaw resistance concrete testing device can test both the impermeability and freeze-thaw resistance of concrete specimens, and it occupies little space, making it easy to place and maintain. For the testing of concrete specimens, separate dedicated concrete specimens must be prepared for both tests; that is, the same concrete specimen cannot be used for both tests. Therefore, if two different tests are to be carried out, two sets of concrete specimens must be prepared separately.
[0026] Specifically, the water supply assembly 30 includes a high-pressure water pump 31 installed within the frame 10. The input end of the high-pressure water pump 31 is connected to an external water source, and the output end is equipped with an output pipe 32. The external water source can be a municipal tap water pipe 33 or a water storage tank or other water supply facilities. The end of the output pipe 32 away from the high-pressure water pump 31 is connected to a vertically arranged water pipe 33, which is connected to a circular hole 22. The high-pressure water pump 31 pumps water into the output pipe 32 and the water pipe 33, and then the water flows into the container tank 20 through the circular hole 22. A sloping pipe 34 is connected to the water pipe 33. The output pipe 32 is connected to the end of the sloping pipe 34 away from the water pipe 33. A drain pipe 35 is connected to the lower end of the water pipe 33. A drain valve 36 is installed on the drain pipe 35. An inlet valve 37 is installed at the end of the water pipe 33 near the circular hole 22. During the freeze-thaw resistance test, the inlet valve 37 is open and the drain valve 36 is closed during the water injection into the container 20, allowing water to flow into the container 20 through the output pipe 32, the sloping pipe 34, and the water pipe 33. To prevent the water pipe 33 from rupturing due to the freezing and expansion of residual water in the water pipe 33 during the freeze-thaw test, the inlet valve 37 is closed and the drain valve 36 is opened after the water injection is completed, draining the water from the water pipe 33 and the sloping pipe 34.
[0027] During setup, a filter screen 23 is installed at the bottom of the container 20, located at the circular hole 22. After testing, when the water in the container 20 needs to be drained, the drain valve 36 and the inlet valve 37 are opened, allowing the water in the tank to drain out through the water pipe 33 and the drain pipe 35. During the concrete specimen testing, some debris may fall off. The filter screen 23 filters the water flow, trapping the debris in the water. Subsequently, the staff uses a vacuum cleaner to clean the debris on the filter screen 23 and inside the container 20. The inclined pipe 34 prevents the drained water from entering the output pipe 32, thus avoiding contamination of the output pipe 32. After draining, the drain valve 36 and the inlet valve 37 can be closed. Then, the high-pressure water pump 31 pumps water into the output pipe 32, the inclined pipe 34, and the water pipe 33. Next, the drain valve 36 is opened to drain the water, cleaning the output pipe 32, the inclined pipe 34, and the water pipe 33. The cleaning operation can be repeated multiple times.
[0028] In a specific configuration, the fixing component 50 includes a mounting base 51 mounted on the receiving container 20. Two upright plates 52 are spaced apart on the mounting base 51. Each upright plate 52 has horizontally arranged sliding holes, and a sliding rod 53 is slidably mounted within both sliding holes. A connecting block 54 is located on the side of the container lid 40 adjacent to the mounting base 51. The connecting block 54 has a connecting hole. After the container lid 40 is closed, the sliding rod 53 is slid, causing part of the rod 53 to be positioned within the connecting hole, thus fixing the connecting block 54 and the container lid 40. A baffle 55 is provided on the sliding rod 53. A compression spring 56 is fitted onto the rod 53 between the baffle 55 and the upright plate 52 furthest from the connecting block 54. The compression spring 56 provides thrust to the baffle 55 and the sliding rod 53, ensuring stability when part of the sliding rod 53 is positioned within the connecting hole to fix the container lid 40. The mounting base 51 is also provided with a fixing plate 57. The fixing plate 57 has horizontally opened fixing holes 58 that are concentric with the sliding holes and have the same diameter. When the sliding rod 53 fixes the bucket lid 40, the end of the sliding rod 53 is located in the fixing hole 58, which further improves the stability of the sliding rod 53.
[0029] Refrigeration equipment 11 typically consists of four basic components: a compressor, a condenser, a throttling valve, and an evaporator. These components are connected sequentially by pipes to form a closed system. The refrigerant continuously circulates within the system, undergoing state changes and exchanging heat with the outside environment. After absorbing heat from the object being cooled in the evaporator, the liquid refrigerant vaporizes into low-temperature, low-pressure vapor. This vapor is then drawn into the compressor, compressed into high-pressure, high-temperature vapor, and discharged into the condenser. In the condenser, it releases heat to the cooling medium (water or air), condenses into a high-pressure liquid, and is then throttled by the throttling valve to become low-pressure, low-temperature refrigerant. It then re-enters the evaporator to absorb heat and vaporize, achieving the purpose of cyclic refrigeration. The container 20 has an annular groove inside, and an arc-shaped groove on the base plate for the evaporator to pass through. The evaporator is located within the annular groove. Insulation plates are installed on the outer wall of the container 20 and the top of the lid 40.
[0030] The operating principle of the anti-permeability and freeze-thaw resistant concrete testing device in this embodiment is as follows:
[0031] During concrete impermeability testing, the concrete specimen is first placed in the container 20. Then, the lid 40 is placed on top, and the sliding rod 53 is slid so that part of the rod body is in the connecting hole and the end is in the fixing hole 58, thus fixing the connecting block 54 and the lid 40. Next, the rotating handle 43 is turned, causing the threaded rod 41 to rotate, driving the guide rod 44 and the dynamic pressure plate 42 to descend, pressing the concrete specimen downwards until the bottom of the specimen abuts against the rubber ring 21. Then, the high-pressure water pump 31 is started, pumping water into the output pipe 32 and water pipe 33, which then flows into the container 20 through the round hole 22. The rubber ring 21 restricts the water flow to the bottom of the concrete specimen, allowing the water to seep upwards from the bottom, thus testing the concrete's impermeability. The concrete specimen is then removed from the container 20, vertically cut open, and the permeation area within the specimen is measured to determine the concrete's impermeability.
[0032] During the freeze-thaw resistance test of concrete, the concrete specimen is first placed in the container 20, then the lid 40 is placed on top and the sliding rod 53 is slid so that part of the rod body is in the connecting hole and the end is in the fixing hole 58, thus fixing the connecting block 54 and the lid 40. Next, the high-pressure water pump 31 is started to pump water into the output pipe 32 and the water pipe 33, and then the water flows into the container 20 through the round hole 22, so that the water submerges the concrete specimen. Then, the material in the container 20 is frozen by the refrigeration equipment 11. Finally, the concrete specimen is taken out and weighed to understand the freeze-thaw resistance of the concrete specimen.
[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A testing device for impermeable and freeze-thaw resistant concrete, characterized in that: The system includes a frame (10) and a refrigeration device (11) installed within the frame (10). A workbench (12) is mounted on the frame (10), and a container (20) with an open top is mounted on the workbench (12). The refrigeration device (11) is a cooling unit capable of freezing the contents of the container (20). A rubber ring (21) is installed at the bottom of the container (20), and a circular hole (22) is formed at the bottom of the container (20). A water supply assembly (30) is installed within the frame (10) to supply water into the circular hole (22). A bucket lid (40) is hinged at the top. A fixing component (50) for fixing the bucket lid (40) is also provided on the container (20). A threaded rod (41) is spirally provided on the bucket lid (40). One end of the threaded rod (41) is located on the lower side of the bucket lid (40) and is provided with a pressure plate (42). The other end is located on the upper side of the bucket lid (40) and is provided with a rotating handle (43). Several guide rods (44) are circumferentially provided on the pressure plate (42). A guide hole is opened on the bucket lid (40) corresponding to the guide hole. The guide hole is slidably connected to the corresponding guide rod (44).
2. The anti-seepage and anti-freeze-thaw concrete testing device according to claim 1, characterized in that: The water supply assembly (30) includes a high-pressure water pump (31) installed in the frame (10). The input end of the high-pressure water pump (31) is connected to an external water source, and the output end is provided with an output pipe (32). The end of the output pipe (32) away from the high-pressure water pump (31) is connected to a vertically arranged water pipe (33), and the water pipe (33) is connected to a round hole (22).
3. The anti-permeability and freeze-thaw resistant concrete testing device according to claim 2, characterized in that: The water pipe (33) is connected to an upwardly inclined pipe (34), the output pipe (32) is connected to the end of the inclined pipe (34) away from the water pipe (33), the lower end of the water pipe (33) is connected to a drain pipe (35), a drain valve (36) is provided on the drain pipe (35), and an inlet valve (37) is provided on the end of the water pipe (33) near the round hole (22).
4. The anti-permeability and freeze-thaw resistant concrete testing device according to claim 1, characterized in that: The fixing component (50) includes a mounting base (51) disposed on the receiving bucket (20). Two upright plates (52) are disposed at intervals on the mounting base (51). A sliding hole is horizontally disposed on the upright plate (52). A sliding rod (53) is slidably disposed in both sliding holes. A connecting block (54) is disposed on the side of the bucket lid (40) adjacent to the mounting base (51). A connecting hole is opened on the connecting block (54). When part of the sliding rod (53) is located in the connecting hole, the connecting block (54) and the bucket lid (40) are fixed.
5. The anti-seepage and anti-freeze-thaw concrete testing device according to claim 4, characterized in that: A baffle (55) is provided on the slide rod (53), and a compression spring (56) is sleeved on the slide rod (53) located between the baffle (55) and the upright plate (52) away from the connecting block (54).
6. The anti-seepage and anti-freeze-thaw concrete testing device according to claim 5, characterized in that: The mounting base (51) is also provided with a fixing plate (57), and the fixing plate (57) has a fixing hole (58) arranged concentrically with the sliding hole and with the same diameter.
7. The anti-permeability and freeze-thaw resistant concrete testing device according to claim 1, characterized in that: A filter screen (23) is provided at the bottom of the container (20) at the round hole (22).