Marine concrete salt freezing damage test device
By designing marine concrete salt freezing damage testing equipment, including freeze-thaw environment simulation box and sink mechanism, the problem of inaccurate salt freezing damage status in the marine environment in the prior art is solved, and more accurate simulation and reliability of test results are achieved.
Patent Information
- Application Number
- CN202421880106.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-05
AI Technical Summary
When the prior art simulates the frozen damage state of concrete salt in marine environments, it is difficult to accurately simulate the coupling effect of salt ions and freeze-thaw cycles, resulting in a gap between the test results and the actual environment.
A marine concrete salt freezing damage test device was designed, including a freeze-thaw environment simulation box, a sink mechanism, a salt solution storage box and a salt solution recovery box. The temperature and humidity are adjusted through the refrigerator and humidity adjustment mechanism in the simulation box, and combined with the sink mechanism and a salt solution system, the tide rise and fall and freeze-thaw cycle in the marine environment are simulated.
The device can more accurately simulate the salt freezing damage process of offshore concrete in marine environments, providing a more accurate and feasible way to support the durability of offshore concrete.
Smart Images
Figure CN223021876U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of concrete salt freeze-thaw damage, and particularly relates to a test device for salt freeze-thaw damage of marine concrete. Background Technique
[0002] At present, the durability problem of concrete structures is becoming more and more prominent. The durability degradation has a huge negative impact on concrete, thus affecting the service performance of concrete structures. In recent years, more and more cases of concrete structures with performance decline or even collapse due to durability degradation have been reported at home and abroad. Therefore, the concrete durability problem and related research cannot be ignored.
[0003] For coastal areas with relatively low winter temperatures, offshore or marine concrete buildings are easily subjected to the combined action of salt ions and freeze-thaw cycles, thus having an adverse impact on the structural durability. Accurately simulating the salt freeze-thaw damage state of marine concrete in the marine environment is an important support for studying its durability performance.
[0004] At present, the salt freeze-thaw test of concrete in the marine environment mostly adopts the method of soaking first and then freeze-thawing. There is a certain gap between this simulation method and the actual marine environment. The salt solution soaking erosion and freeze-thaw cycles may act simultaneously, and the damage to concrete may also be different under the conditions of rising and falling tides of seawater. To solve the above problems, the utility model provides a test device for salt freeze-thaw damage of marine concrete, so as to more accurately simulate the salt freeze-thaw damage process of marine concrete in the marine environment. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a test device for salt freeze-thaw damage of marine concrete in view of the deficiencies in the above-mentioned prior art.
[0006] To solve the above technical problems, the technical solution adopted by the utility model is as follows: An experimental device for salt-freezing damage of marine concrete, characterized in that it includes a freeze-thaw environment simulation box, a water tank mechanism arranged in the freeze-thaw environment simulation box for containing marine concrete, and a salt solution storage tank and a salt solution recovery tank arranged outside the freeze-thaw environment simulation box to provide a salt-freezing damage test solution environment for the water tank mechanism. The water tank mechanism includes a bottom plate, a large water tank side plate arranged on the bottom plate for enclosing a large water tank, and a small water tank side plate located inside the large water tank side plate for enclosing a small water tank. The large water tank side plate includes a first side plate, a second side plate, a third side plate, and a fourth side plate connected in sequence. The small water tank side plate includes two perpendicularly arranged partitions. The other ends of the two perpendicularly arranged partitions are respectively connected to the first side plate and the second side plate. A liquid inlet hole is opened on the side wall of the first side plate at the position of the small water tank. One end of the liquid inlet pipe is communicated with the salt solution storage tank, and the other end of the liquid inlet pipe passes through the liquid inlet hole and is communicated with the small water tank. A water pump is installed at the liquid inlet end of the liquid inlet pipe. A first liquid outlet hole is opened on the side wall of the second side plate at the position of the small water tank, and a second liquid outlet hole is opened on the side wall of the second side plate at the position other than the small water tank. The first liquid outlet hole is communicated with the salt solution recovery tank through a first recovery pipe, and the second liquid outlet hole is communicated with the salt solution recovery tank through a second recovery pipe. A conversion hole is opened on one partition, and a conversion transmission pipe is installed at the position of the conversion hole on the partition. A first control valve is installed on the conversion transmission pipe, a second control valve is installed on the first recovery pipe, and a third control valve is installed on the second recovery pipe.
[0007] The above experimental device for salt-freezing damage of marine concrete is characterized in that: a sealing door and a controller are arranged on the freeze-thaw environment simulation box, and the water pump, the first control valve, the second control valve, and the third control valve are all controlled by the controller.
[0008] The above experimental device for salt-freezing damage of marine concrete is characterized in that: a salt solution spraying mechanism connected to the salt solution storage tank is arranged in the freeze-thaw environment simulation box. The salt solution spraying mechanism includes a salt solution transmission pipe and a first atomizing nozzle arranged on the salt solution transmission pipe. The salt solution transmission pipe is communicated with the salt solution storage tank, and the first atomizing nozzle is controlled by the controller.
[0009] The above experimental device for salt-freezing damage of marine concrete is characterized in that: a liquid level monitor is arranged on the side wall of the second side plate at the position of the small water tank, and the signal output end of the liquid level monitor is connected to the controller.
[0010] The above-mentioned marine concrete salt-freezing damage test device is characterized in that: a refrigerator and a humidity regulating mechanism are arranged on the freeze-thaw environment simulation box. The humidity regulating mechanism includes a water tank arranged on the top of the freeze-thaw environment simulation box and an aqueous solution spraying mechanism arranged in the freeze-thaw environment simulation box and connected to the water tank. The aqueous solution spraying mechanism includes an aqueous solution transmission pipe and a second atomizing nozzle arranged on the aqueous solution transmission pipe. The refrigerator and the second atomizing nozzle are both controlled by a controller.
[0011] The beneficial effects of the present utility model are as follows: The required freeze-thaw cycle environment is simulated through the freeze-thaw environment simulation box; the water tank mechanism is placed inside the environment simulation box to perform the salt-freezing test, and it can sense the water level in the water tank and simulate the ebb and flow of the ocean environment; the salt solution storage device is used to store the salt solution required for the test and is connected to the water tank through a pipeline to meet the water inlet and outlet requirements of the water tank; a refrigerator and a humidity regulating mechanism are arranged on the freeze-thaw environment simulation box to adjust the temperature and humidity inside the test device, so as to more accurately simulate the climate of the offshore environment, and can more reasonably simulate the environmental conditions such as the shallow water area, deep water area height, high tide, ebb tide cycle, and freeze-thaw cycle of the ocean environment, providing a more accurate and feasible method for obtaining the freeze-thaw damage state of marine concrete structures in the ocean environment and supporting the research on the durability of marine concrete.
[0012] The technical solution of the present utility model will be further described in detail below through the drawings and embodiments. Description of the Drawings
[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0014] Figure 2 It is a schematic diagram of the structure of the water tank mechanism of the present utility model.
[0015] Description of the Reference Numerals:
[0016] 1 - Freeze-thaw environment simulation box; 2 - Sealing door; 3 - Controller;
[0017] 4 - Salt solution storage tank; 5 - Liquid inlet pipe; 6 - Water tank mechanism;
[0018] 6-1 - First side plate; 6-2 - Second side plate; 6-3 - Third side plate;
[0019] 6-4 - Fourth side plate; 6-5 - Partition; 6-6 - Liquid inlet hole;
[0020] 6-7 - Conversion hole; 6-8 - Liquid level monitor; 6-9 - First liquid outlet hole;
[0021] 6-10 - Second liquid outlet hole; 6-11 - Second recovery pipe; 7 - Salt solution spraying mechanism;
[0022] 8 - Aqueous solution spraying mechanism; 9 - Water tank; 10 - Refrigerator;
[0023] 11 - Salt solution recovery tank. Specific implementation manner
[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the described embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this disclosure.
[0025] As Figure 1 and Figure 2 shown, the present utility model includes a freeze-thaw environment simulation box 1, a water tank mechanism 6 disposed in the freeze-thaw environment simulation box 1 for containing marine concrete, and a salt solution storage tank 4 and a salt solution recovery tank 11 disposed outside the freeze-thaw environment simulation box 1 to provide a salt freeze damage test solution environment for the water tank mechanism 6. The water tank mechanism 6 includes a bottom plate, a large water tank side plate disposed on the bottom plate for enclosing a large water tank, and a small water tank side plate disposed inside the large water tank side plate for enclosing a small water tank. The large water tank side plate includes a first side plate 6-1, a second side plate 6-2, a third side plate 6-3, and a fourth side plate 6-4 connected in sequence. The small water tank side plate includes two perpendicular partitions 6-5. The other ends of the two perpendicular partitions 6-5 are respectively connected to the first side plate 6-1 and the second side plate 6-2. A liquid inlet hole 6-6 is opened on the side wall of the first side plate 6-1 at the position of the small water tank. One end of the liquid inlet pipe 5 is communicated with the salt solution storage tank 4, and the other end of the liquid inlet pipe 5 passes through the liquid inlet hole 6-6 and is communicated with the small water tank. A water pump is installed at the liquid inlet end of the liquid inlet pipe 5. A first liquid outlet hole 6-9 is opened on the side wall of the second side plate 6-2 at the position of the small water tank, and a second liquid outlet hole 6-10 is opened on the side wall of the second side plate 6-2 at a position other than the small water tank. The first liquid outlet hole 6-9 is communicated with the salt solution recovery tank 11 through a first recovery pipe, and the second liquid outlet hole 6-10 is communicated with the salt solution recovery tank 11 through a second recovery pipe 6-11. A conversion hole 6-7 is opened on one partition 6-5, and a conversion transmission pipe is installed at the position of the conversion hole 6-7 on the partition 6-5. A first control valve is installed on the conversion transmission pipe, a second control valve is installed on the first recovery pipe, and a third control valve is installed on the second recovery pipe 6-11.
[0026] In this embodiment, a sealing door 2 and a controller 3 are provided on the freeze-thaw environment simulation box 1. The water pump, the first control valve, the second control valve, and the third control valve are all controlled by the controller 3.
[0027] In this embodiment, a salt solution spraying mechanism 7 connected to the salt solution storage tank 4 is provided inside the freeze-thaw environment simulation chamber 1. The salt solution spraying mechanism 7 includes a salt solution transfer pipe and a first atomizing nozzle provided on the salt solution transfer pipe. The salt solution transfer pipe is communicated with the salt solution storage tank 4, and the first atomizing nozzle is controlled by the controller 3.
[0028] In this embodiment, a liquid level monitor 6-8 is provided on the side wall of the second side plate 6-2 at the position of the small water tank. The signal output end of the liquid level monitor 6-8 is connected to the controller 3.
[0029] In this embodiment, a refrigerator 10 and a humidity adjustment mechanism are provided on the freeze-thaw environment simulation chamber 1. The humidity adjustment mechanism includes a water tank 9 provided on the top of the freeze-thaw environment simulation chamber 1 and an aqueous solution spraying mechanism 8 provided inside the freeze-thaw environment simulation chamber 1 and connected to the water tank 9. The aqueous solution spraying mechanism 8 includes an aqueous solution transfer pipe and a second atomizing nozzle provided on the aqueous solution transfer pipe. Both the refrigerator 10 and the second atomizing nozzle are controlled by the controller 3.
[0030] It should be noted that the required freeze-thaw cycle environment is simulated by the freeze-thaw environment simulation chamber; the water tank mechanism is placed inside the environment simulation chamber to perform the salt freezing test, can sense the water level in the water tank, and can simulate the ebb and flow of the ocean environment; the salt solution storage device is used to store the salt solution required for the test and is connected to the water tank through a pipeline to meet the water inlet and outlet requirements of the water tank; a refrigerator and a humidity adjustment mechanism are provided on the freeze-thaw environment simulation chamber to adjust the temperature and humidity inside the test device, so as to more accurately simulate the climate of the offshore environment, and can more reasonably simulate the environmental conditions such as the shallow water area, deep water area height, high tide, ebb tide cycle, and freeze-thaw cycle of the ocean environment, providing a more accurate and feasible way to obtain the freeze-thaw damage state of marine concrete structures in the ocean environment and supporting the research on the durability of marine concrete.
[0031] The water tank mechanism 6 includes a large water tank and a small water tank inside. The main function of the small water tank is to avoid the need to fill the entire intelligent water tank with water when conducting tests with only a small number of samples, saving test costs. A conversion transfer pipe is installed at the position of the conversion hole 6-7 on the partition plate 6-5, and a first control valve is installed on the conversion transfer pipe. When needed, the first control valve is opened, and the salt solution in the small water tank will flow to the entire large water tank.
[0032] The freeze-thaw environment simulation chamber 1 is made of insulating and corrosion-resistant materials.
[0033] Furthermore, the water tank mechanism 6, the salt solution storage tank 4, and the salt solution recovery tank 11 are made of acid and alkali resistant and corrosion-resistant plastic materials.
[0034] When the utility model is in use and when conducting the salt freeze-thaw damage experiment on marine concrete, if it is a small test block, it is placed in a small water tank. The first control valve is closed, and the water level of the small water tank is set according to the test requirements, so that the concrete test block is immersed in the salt solution. At the same time, the controller 3 sets the heights of the shallow water area and the deep water area, the tidal flood and ebb cycle, and the freeze-thaw cycle. After the operation is completed, the sealing door 2 of the freeze-thaw environment simulation box 1 is closed, and wait for the test to be completed. After the test is over, the waste liquid is recovered by controlling the second control valve, and no personnel operation is required during this period.
[0035] If it is a large test block, it is placed in the large water tank area outside the small water tank. The first control valve is opened, and the water level of the small water tank is set according to the test requirements, so that the concrete test block is immersed in the salt solution. At the same time, the controller 3 sets the heights of the shallow water area and the deep water area, the tidal flood and ebb cycle, and the freeze-thaw cycle. After the operation is completed, the sealing door 2 of the freeze-thaw environment simulation box 1 is closed, and wait for the test to be completed. After the test is over, the waste liquid is recovered by controlling the third control valve, and no personnel operation is required during this period.
[0036] In an embodiment of the utility model, the operator can open or close the first atomizing nozzle inside the freeze-thaw environment simulation box 1 according to the needs, so as to simulate salt spray erosion.
[0037] The above are only the preferred embodiments of the utility model, and do not impose any limitations on the utility model. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the utility model still fall within the protection scope of the technical solution of the utility model.
Claims
1. A marine concrete salt freezing damage test device, characterized in that: The invention comprises a freeze-thaw environment simulation box (1), a water tank mechanism (6) arranged in the freeze-thaw environment simulation box (1) for containing marine engineering concrete, and a salt solution storage box (4) and a salt solution recovery box (11) arranged outside the freeze-thaw environment simulation box (1) for providing the water tank mechanism (6) with a salt freezing damage test solution environment. The water tank mechanism (6) comprises a bottom plate and large water tank side plates arranged on the bottom plate for enclosing a large water tank and small water tank side plates arranged in the large water tank side plates for enclosing a small water tank. The large water tank side plates comprise a first side plate (6-1), a second side plate (6-2), a third side plate (6-3) and a fourth side plate (6-4) connected in sequence. The small water tank side plates comprise two partition plates (6-5) arranged vertically. The other ends of the two partition plates (6-5) arranged vertically are connected to the first side plate (6-1) and the second side plate (6-2) respectively. A liquid inlet hole (6-1) is provided on the side wall of the first side plate (6-1) at the position of the small water tank. -6), one end of the liquid inlet pipe (5) is connected to the salt solution storage box (4), the other end of the liquid inlet pipe (5) passes through the liquid inlet hole (6-6) and is connected to the small water tank, a water pump is installed at the liquid inlet end of the liquid inlet pipe (5), a first liquid outlet hole (6-9) is opened on the side wall of the second side plate (6-2) at the position of the small water tank, and a second liquid outlet hole (6-10) is opened on the side wall of the second side plate (6-2) at the position other than the small water tank, and the first liquid outlet hole (6-9) passes through the first return line The receiving pipe is connected to the salt solution recovery box (11), the second liquid outlet (6-10) is connected to the salt solution recovery box (11) through the second recovery pipe (6-11), a conversion hole (6-7) is opened on a partition (6-5), a conversion transmission pipe is installed on the partition (6-5) at the position of the conversion hole (6-7), a first control valve is installed on the conversion transmission pipe, a second control valve is installed on the first recovery pipe, and a third control valve is installed on the second recovery pipe (6-11).
2. A marine concrete salt freezing damage test device according to claim 1, characterized in that: The freeze-thaw environment simulation box (1) is provided with a sealed door (2) and a controller (3); the water pump, the first control valve, the second control valve and the third control valve are all controlled by the controller (3).
3. A marine concrete salt freezing damage test device according to claim 2, characterized in that: The freeze-thaw environment simulation box (1) is provided with a salt solution spraying mechanism (7) connected to the salt solution storage box (4), the salt solution spraying mechanism (7) comprising a salt solution transmission pipe and a first atomizing nozzle arranged on the salt solution transmission pipe, the salt solution transmission pipe is in communication with the salt solution storage box (4), and the first atomizing nozzle is controlled by a controller (3).
4. A marine concrete salt freezing damage test device according to claim 2, characterized in that: A liquid level monitor (6-8) is arranged on the side wall of the second side plate (6-2) at the position of the small water tank, and a signal output end of the liquid level monitor (6-8) is connected to the controller (3).
5. A marine concrete salt freezing damage test device according to claim 2, characterized in that: The freeze-thaw environment simulation box (1) is provided with a refrigerator (10) and a humidity regulating mechanism, wherein the humidity regulating mechanism comprises a water tank (9) arranged on the top of the freeze-thaw environment simulation box (1) and an aqueous solution spraying mechanism (8) arranged in the freeze-thaw environment simulation box (1) and connected to the water tank (9), wherein the aqueous solution spraying mechanism (8) comprises an aqueous solution transmission pipe and a second atomizing nozzle arranged on the aqueous solution transmission pipe, and both the refrigerator (10) and the second atomizing nozzle are controlled by a controller (3).