Concrete dry-wet durable circulation system

Abstract

The utility model discloses a concrete dry-wet durability circulating system which comprises a test room and a test piece frame arranged in the test room, the concrete dry-wet durability circulating system further comprises a dry-wet circulating device, the dry-wet circulating device comprises a spray header, a fan and a cold trap, and the spray header is arranged in the test room. The spraying head is arranged above the test piece frame, the fan and the cold trap are arranged on the same side of the test room, the fan is located above the cold trap, and the air blowing direction of the fan is obliquely arranged towards the top of the test room. Concrete is wetted by the spray head, and indoor water vapor is collected by the fan and the cold trap to accelerate the drying of the environment so as to accelerate the drying of the concrete, so that the durability test of the dry-wet cycle of the concrete test piece is quickly realized, and the test efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete durability tests, and particularly relates to a concrete dry-wet durability cycle system. Background Art

[0002] The environment where dry-wet cycles exist belongs to a type of corrosive environment. In a corrosive environment, concrete structures are prone to corrosion, leading to a decline in their performance, directly affecting the safety and durability of concrete structures. A typical example in this environment is... Compared with ordinary environments, the performance of concrete structures, especially reinforced concrete structures, degrades rapidly during service in a corrosive environment. The impact of a corrosive environment on the durability of concrete structures is an issue that urgently needs to be studied and solved. Currently, there are generally two test methods for studying the performance degradation law of concrete structures in a corrosive environment. One is the on-site exposure test method, and the other is the indoor accelerated test method. The former uses the real on-site environment as the corrosive environment, especially the environment where dry-wet cycles exist, and has disadvantages such as inconvenient observation and many accidental factors. The latter uses an environment close to the real on-site environment as the simulation environment and has advantages such as convenient observation and controllable factors. The indoor accelerated test method is the test method adopted in most studies. For example, an environmental simulation device for testing the erosion of concrete under a complex coupling environment disclosed in Patent Application No. CN202320606346.0 includes a simulation box body, a weight monitoring component, a laser scanner, a temperature control component, a rainfall component, an air flow simulation component, an ultraviolet simulation component, a time relay, and a control processor. The weight monitoring component is arranged inside the simulation box body, and the laser scanner, ultraviolet simulation component, air flow simulation component, and temperature control component are all arranged inside the simulation box body and above the weight monitoring component. The rainfall component is arranged at the top of the simulation box body, and the time relay and control processor are arranged outside the simulation box body. This technical solution can automatically simulate daily dry-wet cycles, wind erosion, and ultraviolet irradiation environments, providing support for experiments that need to long-term simulate the cyclic conditions of a daily complex coupling environment, and can also monitor the weight change of concrete test blocks in real time and scan them, so that experimenters can analyze the durability performance of concrete blocks. There is also a durability test box for concrete under the action of salt spray erosion disclosed in Patent Application No. CN202120853835.7, which is used to solve the problem that existing test devices cannot truly simulate the influence of the combined action of load and salt spray erosion on marine concrete structures. It includes a main body pp board box, a spraying system, a constant temperature system, an exhaust system, and a circulation system. This test device has a simple structure and low cost, can ensure the uniform dispersion of the test solution, and the temperature inside the box body is constant. This test box can also be used for other types of durability tests, such as carbonation, dry-wet cycles, etc. The above technical solutions can all complete simulation experiments, but the water vapor generated after the experiments will be directly discharged into the outdoor environment, which will cause waste of resources. Content of the Utility Model

[0003] The present utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present utility model provides a concrete dry-wet durability cycling system, which can accelerate environmental drying while collecting water vapor in the room.

[0004] The concrete dry-wet durability cycling system according to the first aspect embodiment of the present utility model includes a test chamber and a specimen rack. The specimen rack is arranged in the test chamber. The concrete dry-wet durability cycling system further includes a dry-wet cycling device. The dry-wet cycling device includes a spray head, a fan and a cold trap. The spray head is arranged above the specimen rack. The fan and the cold trap are both arranged on the same side of the test chamber and the fan is located above the cold trap. The blowing direction of the fan is inclined towards the top of the test chamber.

[0005] The concrete dry-wet durability cycling system according to the embodiment of the present utility model has at least the following beneficial effects: The concrete is wetted by the spray head, and then the fan and the cold trap are used to collect water vapor in the room to accelerate the drying of the environment, thereby accelerating the drying of the concrete, so as to quickly realize the durability test of the dry-wet cycle of the concrete specimen and effectively improve the test efficiency.

[0006] According to some embodiments of the present utility model, the dry-wet cycling device further includes a first water pump and a medium container for containing a test medium. The medium container is communicated with the spray head through the first water pump.

[0007] According to some embodiments of the present utility model, a return pool is arranged at the bottom of the test chamber. The return pool is communicated with the medium container through a second water pump.

[0008] According to some embodiments of the present utility model, a mesh grille for passage is arranged at the top of the return pool.

[0009] According to some embodiments of the present utility model, the center of the bottom of the test chamber is a platform. The specimen rack is arranged on the platform. The return pool is arranged around the platform.

[0010] According to some embodiments of the present utility model, a plurality of partitions are sequentially arranged on the specimen rack from top to bottom. The partition at the bottom is a whole plate, and leaky grooves are arranged at intervals on other partitions.

[0011] According to some embodiments of the present utility model, a heating member is arranged below the partition at the bottom.

[0012] According to some embodiments of the present utility model, there are a plurality of specimen racks, and a plurality of heating members are arranged in a matching manner.

[0013] According to some embodiments of the present utility model, there are a plurality of spray heads which are evenly arranged on the top of the test chamber.

[0014] According to some embodiments of the present utility model, a temperature and humidity sensor is provided in the test chamber.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0017] Figure 1 is a schematic structural diagram of a concrete dry-wet durability cycle system according to an embodiment of the present utility model.

[0018] Figure 2 is a schematic structural diagram of a concrete dry-wet durability cycle system according to another embodiment of the present utility model.

[0019] 10. Test chamber; 11. Return pool; 12. Mesh grille; 13. Platform; 20. Specimen rack; 21. Partition board; 22. Heating member; 31. Spray head; 32. Fan; 33. Cold trap; 41. First water pump; 42. Medium container; 43. Second water pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0023] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0024] Reference Figure 1 As shown in the figure, according to the concrete dry-wet durability cycle system of the embodiment of the present utility model, it includes a test chamber 10 and a specimen rack 20. The specimen rack 20 is arranged in the test chamber 10. The concrete dry-wet durability cycle system further includes a dry-wet cycle device. The dry-wet cycle device includes a spray head 31, a fan 32 and a cold trap 33. The spray head 31 is arranged above the specimen rack 20. The fan 32 and the cold trap 33 are both arranged on the same side of the test chamber 10 and the fan 32 is located above the cold trap 33. The blowing direction of the fan 32 is inclined towards the top of the test chamber 10.

[0025] During actual use, the concrete is wetted by the spray head 31, and then the fan 32 and the cold trap 33 are used to collect the water vapor in the room to accelerate the drying of the environment and thus accelerate the drying of the concrete, so as to quickly realize the durability test of the dry-wet cycle of the concrete specimen and effectively improve the test efficiency.

[0026] Reference Figure 2 As shown in the figure, in some specific embodiments of the present utility model, the dry-wet cycle device further includes a first water pump 41 and a medium container 42 for containing a test medium. The medium container 42 is communicated with the spray head 31 through the first water pump 41. Specifically, the test medium can be water, brine or other media existing in common environments.

[0027] In some specific embodiments of the present utility model, a return pool 11 is arranged at the bottom of the test chamber 10. The return pool 11 is communicated with the medium container 42 through a second water pump 43. Specifically, the center of the bottom of the test chamber 10 is a platform 13. The specimen rack 20 is arranged on the platform 13. The return pool 11 surrounds the platform 13. The platform 13 has a structure with a high center and slopes downwards towards the periphery, and the inclination angle is 1° - 2°, so that the liquid sprayed from the spray head 31 can naturally flow into the return pool 11. Preferably, a mesh grille 12 for passage is arranged at the top of the return pool 11. Through the above design, the excess liquid sprayed from the spray head 31 can be collected and returned to the medium container 42 through the second water pump 43.

[0028] In some specific embodiments of the present utility model, a plurality of partition plates 21 are successively arranged on the specimen rack 20 from top to bottom. The lowermost partition plate 21 is a whole plate, and the other partition plates 21 are provided with water leakage grooves (not shown in the figure) at intervals.

[0029] Preferably, a heating member 22 is provided below the lowermost partition plate 21. The heating member 22 is protected from water by the integral partition plate 21, and the sprayed liquid will flow downward through the water leakage groove after being sprayed onto the concrete specimen, thereby completing the spraying of all the concrete specimens on the specimen rack 20.

[0030] In some specific embodiments of the present invention, there are multiple specimen racks 20, and multiple heating members 22 are correspondingly provided. The heating member 22 can adopt a common technical solution in the prior art, such as an air heater. By means of the heating member 22, the environment in the test chamber 10 can be heated, so that the concrete can be dried faster, and at the same time, a humid and hot environment can also be simulated.

[0031] In some specific embodiments of the present invention, there are multiple spray heads 31, which are uniformly arranged on the top of the test chamber 10.

[0032] In some specific embodiments of the present invention, a temperature and humidity sensor (not shown in the figure) is provided in the test chamber 10 for obtaining the temperature and humidity in the test chamber 10. Preferably, a pressure sensor (not shown in the figure) is provided on each partition plate 21 for supporting the concrete specimen for obtaining the weight change of the concrete specimen.

[0033] It should be noted that the first water pump 41, the second water pump 43, the spray head 31, the fan 32, the cold trap 33, the temperature and humidity sensor, and the pressure sensor can all obtain corresponding models by referring to reference books according to actual required parameters and be purchased on the market. Their specific structures and working principles will not be elaborated here.

[0034] Working principle:

[0035] The concrete specimen on the specimen rack 20 is sprayed and humidified by the spray head 31 to make the concrete specimen in a wet state. Then, after the spraying is completed, by turning on the fan 32 and the cold trap 33, the fan 32 will form a circulating air flow in the test chamber 10. Refer to Figure 1 and Figure 2 the arrow directions in for the flow direction of the circulating air flow, and the moisture in the concrete specimen will be extracted. The cold trap 33 on the circulating air flow path will capture the moisture in the air flow, thereby drying the environment faster. The moisture condensed on the cold trap 33 will flow naturally along the wall of the test chamber 10 into the return pool 11.

[0036] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A dry-wet durability cycling system for concrete, comprising a test chamber (10) and a specimen rack (20), wherein the specimen rack (20) is arranged in the test chamber (10), and is characterized in that, The concrete dry-wet durability cycle system further includes a dry-wet cycle device, which includes a spray head (31), a blower (32), and a cold trap (33). The spray head (31) is arranged above the specimen rack (20). The blower (32) and the cold trap (33) are both arranged on the same side of the test chamber (10), and the blower (32) is located above the cold trap (33). The blowing direction of the blower (32) is inclined towards the top of the test chamber (10).

2. The concrete dry-wet durability cycle system according to claim 1, characterized in that, The dry-wet cycle device further includes a first water pump (41) and a medium container (42) for containing the test medium. The medium container (42) is communicated with the spray head (31) through the first water pump (41).

3. The concrete dry-wet durability cycling system according to claim 2, characterized in that, A reflux pool (11) is arranged at the bottom of the test chamber (10). The reflux pool (11) is communicated with the medium container (42) through a second water pump (43).

4. The concrete dry-wet durability cycle system according to claim 3, wherein, A mesh grille (12) for passage is arranged at the top of the reflux pool (11).

5. The concrete dry-wet durability cycle system according to claim 4, characterized in that, The center of the bottom of the test chamber (10) is a platform (13). The specimen rack (20) is arranged on the platform (13), and the reflux pool (11) is arranged around the platform (13).

6. The concrete dry-wet durability cycle system according to claim 5, characterized in that, A plurality of partitions (21) are sequentially arranged on the specimen rack (20) from top to bottom. The partition (21) at the bottommost is a whole plate, and leaky grooves are arranged at intervals on other partitions (21).

7. The concrete dry-wet durability cycle system according to claim 6, characterized in that, A heating member (22) is arranged below the partition (21) at the bottommost.

8. The concrete dry-wet durability cycling system according to claim 7, characterized in that, There are a plurality of specimen racks (20), and a plurality of heating members (22) are arranged correspondingly.

9. The concrete dry-wet durability cycling system according to claim 1, characterized in that There are a plurality of spray heads (31), which are evenly arranged on the top of the test chamber (10).

10. The concrete dry-wet durability cycle system according to claim 1, characterized in that, A temperature and humidity sensor is arranged in the test chamber (10).

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