Concrete sample dry-wet cycle test equipment and method

Abstract

The invention provides a dry-wet cycle test device and method for a concrete sample, and relates to the field of material performance test instruments. The concrete sample dry-wet cycle test equipment comprises a dry-wet cycle test box, a positioning device, a liquid storage box and a heating device. The dry-wet cycle test box is communicated with the liquid storage box, and the liquid storage box is used for conveying liquid to the dry-wet cycle test box or collecting the liquid discharged from the dry-wet cycle test box; the positioning device is mounted in the dry-wet cycle test box and is used for positioning a to-be-tested sample; the heating device comprises a first heating pipe and a second heating pipe, and the first heating pipe and the second heating pipe are both arranged in the dry-wet cycle test box and are matched to heat the inner side and the outer side of the to-be-tested sample. The test equipment can improve the heating uniformity of a to-be-tested sample and improve the accuracy of a test result.

Description

Technical Field

[0001] The invention relates to the field of material performance testing instruments, and in particular to a dry-wet cycle testing device and method for a concrete sample. Background Art

[0002] Concrete is widely used in many construction fields such as roads, bridges and buildings due to its low cost, simple preparation process and high performance. However, if concrete is exposed to marine environment, acid rain and saline soil, it will cause serious damage. Under these harsh conditions, the durability of concrete is affected by inorganic salts such as chloride and sulfate. Among them, sulfate is the most harmful salt to ordinary concrete. The attack on ordinary concrete is both physical and chemical, which will seriously reduce the durability of concrete components. Sulfate erosion of concrete is one of the important reasons for its durability damage. There are a lot of sulfates in seawater, rainwater and soil. These sulfates will invade concrete and react with mineral components to produce a series of physical and chemical reactions, causing problems such as concrete structure damage and strength reduction. In addition, sulfate erosion often couples with dry-wet cycles to accelerate concrete damage. Therefore, it is particularly important to detect the durability of concrete under the coupling of sulfate erosion and dry-wet cycles. Existing concrete sulfate dry-wet cycle testers usually use electric heating pipes arranged at the bottom of the tester and combined with fan exhaust heating to dry the sample, but this method has the problem of uneven drying of the sample. In addition, most liquid storage tanks are made of all-steel or stainless steel, and the drain port is set at a certain height from the bottom of the side wall. During the drainage process, the drainage may not be complete, and the operator is required to use tools to scoop out the remaining liquid. The labor intensity is high and the work efficiency is low. If the remaining liquid is not scooped out in time, there will be a risk of corrosion of the liquid storage tank. Summary of the invention

[0003] The object of the present invention is to provide a dry-wet cycle test device and method for concrete samples, which can improve the uniformity of heating of the samples to be tested and improve the accuracy of the test results.

[0004] The embodiment of the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides a concrete sample dry-wet cycle test device, comprising:

[0006] A dry-wet cycle test box, a positioning device, a liquid storage tank and a heating device; the dry-wet cycle test box is connected to the liquid storage tank, and the liquid storage tank is used to transport liquid to the dry-wet cycle test box or to collect liquid discharged from the dry-wet cycle test box; the positioning device is installed in the dry-wet cycle test box, and the positioning device is used to position the sample to be tested; the heating device includes a first heating tube and a second heating tube, and the first heating tube and the second heating tube are both arranged in the dry-wet cycle test box, and the two cooperate to heat the inner and outer sides of the sample to be tested.

[0007] In an optional embodiment, the first heating tube is configured as a bent tube, and at least a portion of the first heating tube extends in the axial direction of the dry-wet cycle test chamber.

[0008] Based on the above scheme, the first heating tube extends in the axial direction of the dry-wet cycle test chamber, which can not only make the axial part of a single test sample of the dry-wet cycle test chamber heated evenly, but also can evenly heat multiple test samples arranged in the axial direction of the dry-wet cycle test chamber, thereby improving the heating efficiency and improving the heating uniformity of the test samples.

[0009] In an optional embodiment, the first heating tube is arranged around the positioning device in the circumferential direction of the dry-wet cycle test chamber.

[0010] Based on the above scheme, the first heating tube extends in the circumferential direction of the dry-wet cycle test box, which can not only make the part of a single test sample in the circumferential direction of the dry-wet cycle test box heated evenly, but also can uniformly heat multiple test samples arranged in the circumferential direction of the dry-wet cycle test box, thereby improving the heating efficiency and improving the heating uniformity of the test samples.

[0011] In an optional embodiment, the dry-wet cycle test chamber includes a chamber body and two chamber doors, the chamber body is provided with an operating port, the two chamber doors are rotatably matched with the chamber body, the two chamber doors are used to close the operating port, and when the two chamber doors cooperate to close the operating port, the chamber body and the two chamber doors cooperate to define a immersion chamber for storing a solution.

[0012] Based on the above solution, by opening the two chamber doors, a large area of ​​the operation port is opened, which is conducive to taking and placing the samples to be tested through the operation port, and the operation is convenient and flexible.

[0013] In an optional embodiment, the first heating pipes are distributed on the two cabinet doors at the same time.

[0014] Based on the above solution, the first heating tube has a wide distribution area and a large heating area, which can improve the heating uniformity of the sample to be tested.

[0015] In an optional embodiment, the positioning device includes a vertical pipe, a plurality of sockets and a bearing grid, the vertical pipe is fixed in the dry-wet cycle test chamber, the plurality of sockets are fixed to the vertical pipe, and the plurality of sockets are arranged at intervals in the axial direction of the vertical pipe; the bearing grid is connected to one of the plurality of sockets; the bearing grid is used to position the sample to be tested; and the second heating tube is passed through the vertical pipe.

[0016] Based on the above scheme, the second heating tube is positioned by the riser, and the position of the second heating tube is firm and reliable. When the second heating tube generates heat, the surroundings of the second heating tube are heated, and the heating area is large. The samples to be tested distributed around the second heating tube can be heated at the same time, and the heating efficiency is high, and the samples to be tested are heated evenly. The samples to be tested are placed on the bearing grid, and part of the samples to be tested is exposed at the mesh of the bearing grid, which reduces the area blocked by the samples to be tested. The mesh is conducive to the circulation of the solution and the transfer of heat, and improves the uniformity of immersion and heating of the samples to be tested. In addition, the samples to be tested can be positioned on the holders at different heights through the bearing grid according to the needs, and the position adjustment is flexible.

[0017] In an optional embodiment, a plurality of heat dissipation holes are provided on the tube wall of the vertical tube.

[0018] Based on the above solution, when the second heating tube is in operation, heat is not only transferred through the vertical pipe, but also can be transferred through the heat dissipation holes, resulting in small heat loss, high heating efficiency and low operating cost.

[0019] In an optional embodiment, the bottom wall of the liquid storage tank is configured as a water-conducting slope, and a drainage hole penetrating the bottom wall is provided on the lower side of the water-conducting slope.

[0020] Based on the above scheme, the drain hole is arranged on the lower side. When the solution in the liquid storage tank needs to be discharged, the drain hole is opened. Under the action of gravity or the action of the drain valve, the solution in the liquid storage tank can be discharged from the drain hole, and the drain hole is at the lowest position. The solution is not easy to remain in the liquid storage tank, and there is no need to manually scoop out the solution, thereby reducing labor intensity and improving operating efficiency. In addition, it is not easy for the solution to accumulate in the liquid storage tank and corrode the liquid storage tank.

[0021] In an optional embodiment, the bottom of the wet-dry cycle test box is connected to the liquid storage tank, and the height of the water outlet hole of the wet-dry cycle test box is higher than the height of the drainage hole of the liquid storage tank.

[0022] Based on the above scheme, the solution in the dry-wet cycle test chamber can be discharged into the liquid storage tank by gravity, saving energy consumption.

[0023] In a second aspect, the present invention provides a concrete sample dry-wet cycle test method, which is applicable to the concrete sample dry-wet cycle test device described in any one of the aforementioned embodiments, and the method comprises:

[0024] Place the sample to be tested on the positioning device;

[0025] The solution in the liquid storage tank is transported to the dry-wet cycle test chamber;

[0026] After the test sample has been immersed for a set time, the solution in the dry-wet cycle test chamber is discharged into the liquid storage tank;

[0027] After the solution in the dry-wet cycle test box is discharged, the sample to be tested is first air-dried, and then the sample to be tested is dried using a heating device.

[0028] The beneficial effects of the embodiments of the present invention are:

[0029] In summary, the concrete sample dry-wet cycle test equipment provided in this embodiment can heat the outside and inside of the sample to be tested placed on the positioning device at the same time through the cooperation of the first heating tube and the second heating tube. In this way, the heated area of ​​the sample to be tested is large, the heating is uniform, the heating efficiency is high, the temperature environment of multiple samples to be tested is basically the same, the test results of the samples to be tested are less affected by the temperature environment, and the accuracy of the test results is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of a dry-wet cycle test device for concrete samples according to an embodiment of the present invention from one perspective;

[0032] Figure 2 A schematic diagram of another perspective of a dry-wet cycle test device for concrete samples according to an embodiment of the present invention;

[0033] Figure 3 for Figure 2 Schematic cross-sectional view along the AA direction;

[0034] Figure 4 A schematic diagram of a concrete sample dry-wet cycle test device according to an embodiment of the present invention with the box door opened;

[0035] Figure 5 for Figure 4 Schematic cross-sectional view along the BB direction.

[0036] icon:

[0037] 001-test sample; 100-dry-wet cycle test chamber; 110-chamber body; 111-water outlet; 112-pipeline; 113-drain valve; 120-chamber door; 121-handle; 130-liquid level gauge; 200-positioning device; 210-riser pipe; 220-seat; 230-bearing grid; 231-mesh; 300-liquid storage tank; 310-chamber body; 311-water guide slope; 3 12-drain hole; 320-cover body; 400-heating device; 410-first heating tube; 411-first vertical section; 412-first arc section; 413-second vertical section; 414-second arc section; 415-third vertical section; 416-third arc section; 417-fourth vertical section; 420-second heating tube; 500-air drying device; 600-control box; 610-control panel. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the prior art, when a concrete sample is subjected to a dry-wet cycle test, a heating element is only provided at the bottom of the concrete sample. The heat received by the position of the concrete sample far from the bottom and the concrete sample far from the bottom is less than that received by the bottom, resulting in uneven heating of the concrete sample, difficulty in mastering the heating time of the concrete sample, and low accuracy of the test results. In addition, the solution for soaking the concrete sample is transported through a liquid storage tank, and the solution in the liquid storage tank is not discharged thoroughly, requiring manual drainage, which is labor-intensive and inefficient. In addition, the solution remaining in the liquid storage tank is prone to corrode the liquid storage tank, shortening the service life of the liquid storage tank.

[0045] In view of this, the designer provides a concrete sample dry-wet cycle test equipment, which can improve the heating uniformity of the test sample 001 and improve the accuracy of the test results.

[0046] Please combine Figure 1-Figure 5 In this embodiment, the dry-wet cycle test equipment for concrete samples includes a dry-wet cycle test box 100, a positioning device 200, a liquid storage tank 300 and a heating device 400. The dry-wet cycle test box 100 is connected to the liquid storage tank 300, and the liquid storage tank 300 is used to transport liquid to the dry-wet cycle test box 100 or to collect liquid discharged from the dry-wet cycle test box 100; the positioning device 200 is installed in the dry-wet cycle test box 100, and the positioning device 200 is used to position the sample to be tested 001; the heating device 400 includes a first heating tube 410 and a second heating tube 420, and the first heating tube 410 and the second heating tube 420 are both arranged in the dry-wet cycle test box 100, and the two cooperate to heat the inner side and the outer side of the sample to be tested 001.

[0047] Based on the above, the use of the concrete sample dry-wet cycle test equipment provided in this embodiment is as follows:

[0048] After checking that the equipment is correct, a certain amount of diluted sulfate liquid with a concentration of 5% formed by mixing high-purity sulfate liquid and water is stored in the liquid storage tank 300. A number of samples to be tested 001 are placed on the positioning device 200. The solution in the liquid storage tank 300 is transported to the dry-wet cycle test box 100. When the solution submerges all the samples to be tested 001, the solution addition is stopped. After the sample to be tested 001 is soaked for a set time, the solution in the dry-wet cycle test box 100 is discharged into the liquid storage tank 300. After the solution is discharged, the sample to be tested 001 can be air-dried by a fan first, and then the sample to be tested 001 can be dried by a heating device 400. After the sample to be tested 001 is dried, the sample to be tested 001 is taken out for subsequent testing.

[0049] Through the cooperation of the first heating tube 410 and the second heating tube 420, the outside and the inside of the test sample 001 placed on the positioning device 200 can be heated at the same time. In this way, the heating area of ​​the test sample 001 is large, the heating is uniform, the heating efficiency is high, the temperature environment of multiple test samples 001 is basically the same, the test results of the test sample 001 are less affected by the temperature environment, and the test results are highly accurate.

[0050] The following embodiments illustrate the details of the dry-wet cycle test equipment for concrete samples provided in the present application by way of examples.

[0051] Please combine Figure 1 and Figure 2 In this embodiment, the concrete sample dry-wet cycle test equipment optionally includes a dry-wet cycle test box 100, a positioning device 200, a liquid storage tank 300, a heating device 400, an air drying device 500 and a control box 600. The control box 600 is also connected to the liquid storage tank 300, the heating device 400, the air drying device 500, etc., and plays a role in overall regulation. It can monitor the immersion time, drying time, and air drying time of the test sample 001, and can also control the power of the heating device 400 and the air drying device 500, and control the flow of the solution.

[0052] Please combine Figure 3 and Figure 4Optionally, the dry-wet cycle test box 100 includes a box body 110 and two box doors 120. The box body 110 is configured as a cylindrical tube structure, and the bottom of the box body 110 is provided with supporting feet for stabilizing the shape. The bottom of the box body 110 is provided with a water outlet 111, and the water outlet 111 is connected to the liquid storage tank 300 through a pipe 112. An operating port is provided on the peripheral wall of the box body 110, and the opening area of ​​the operating hole is set as required, and the area of ​​the operating port can be increased as much as possible, thereby improving the flexibility of taking and placing the test sample 001. The two box doors 120 are both rotatably matched with the box body 110, and the two box doors 120 can share a rotating shaft, and the rotating shaft extends in the axial direction of the box body 110. Each door 120 can be configured as an arc plate structure, and the two doors 120 can cooperate to close the operation port. When the two doors 120 close the operation port, the box body 110 and the two doors 120 cooperate to define a soaking chamber for storing the solution. That is, when the sample 001 to be tested needs to be soaked, the solution in the liquid storage tank 300 can enter the soaking chamber from the water outlet 111 through the pipe 112.

[0053] Optionally, a liquid level meter 130 is provided on one of the two chamber doors 120 , and the liquid level meter 130 can obtain the height of the solution in the soaking chamber.

[0054] In addition, in order to facilitate the delivery of the solution in the liquid storage tank 300 to the dry-wet cycle test box 100 , a drain valve 113 may be provided on the pipeline 112 , and the solution in the liquid storage tank 300 may be pumped into the dry-wet cycle test box 100 by the drain valve 113 .

[0055] In addition, in order to facilitate the operation of the box door 120 , a handle 121 may be provided on the box door 120 .

[0056] Please combine Figure 3-Figure 5In this embodiment, optionally, the positioning device 200 includes a riser 210, a plurality of holders 220, and a plurality of bearing grids 230. The riser 210 may be a hollow circular tube, one end of which is fixed to the bottom of the box 110, the axis of the riser 210 may be colinear with the axis of the box 110, and the other end of the riser 210 extends toward the top of the box 110. The plurality of holders 220 are all fixed to the circumferential surface of the riser 210, and the plurality of holders 220 are arranged at intervals in the axial direction of the riser 210. The number of holders 220 is set as required and is not specifically limited in this embodiment. The bearing grid 230 is connected to one of the plurality of holders 220, that is, each bearing grid 230 can be connected through a corresponding holder 220, and the number of the bearing grids 230 is set as needed, and can be selected according to the number of samples 001 to be tested. A bearing grid 230 can be set on each holder 220. In order to facilitate the adjustment of the height of the bearing grid 230, the bearing grid 230 and the holder 220 are set to be detachably assembled. For example, there are card holes on the bearing grid 230, and the card holes on the bearing grid 230 are used to engage with the holder 220. When disassembling, the bearing grid 230 can be withdrawn from the holder 220. In addition, a positioning groove can be set on the top surface of the bearing grid 230, and the positioning groove is used to position the sample 001 to be tested to ensure the stability of the sample 001 to be tested. The number of positioning grooves can be multiple, and the multiple positioning grooves are arranged at intervals around the axis of the riser 210.

[0057] Furthermore, a plurality of heat dissipation holes may be provided on the tube wall of the vertical tube 210 .

[0058] It should be noted that the sample to be tested 001 is positioned by the carrier grid 230, and part of the sample to be tested 001 is exposed at the mesh 231 of the carrier grid 230, which reduces the area blocked by the sample to be tested 001. The mesh 231 is conducive to the circulation of the solution and the transfer of heat, thereby improving the uniformity of immersion and heating of the sample to be tested 001. In addition, the sample to be tested 001 can be positioned on the holder 220 at different heights through the carrier grid 230 according to needs, and the position adjustment is flexible.

[0059] In this embodiment, optionally, the heating device 400 includes a first heating tube 410 and a second heating tube 420. The first heating tube 410 is configured as a bent tube, a portion of the first heating tube 410 extends in the axial direction of the dry-wet cycle test box 100, and the rest of the first heating tube 410 extends in the circumferential direction of the dry-wet cycle test box 100. In this way, the distribution area of ​​the first heating tube 410 is wide, so that the test sample 001 can be heated by the first heating tube 410 in both the circumferential and axial positions of the dry-wet cycle test box 100, and the heating area of ​​the test sample 001 is large and the heating is uniform. In addition, when a plurality of test samples 001 are arranged at intervals in the axial direction of the box body 110, since a portion of the first heating tube 410 extends in the axial direction of the box body 110, the first heating tube 410 can heat a plurality of test samples 001 at the same time, and the plurality of test samples 001 are heated uniformly.

[0060] Please combine Figure 4 For example, in this embodiment, optionally, the first heating tube 410 includes a first vertical section 411, a first arc section 412, a second vertical section 413, a second arc section 414, a third vertical section 415, a third arc section 416 and a fourth vertical section 417. The first arc section 412, the second arc section 414 and the third arc section 416 can all be arc sections. The two ends of the first arc section 412 are respectively connected to the first vertical section 411 and the second vertical section 413, the two ends of the second arc section 414 are respectively connected to the second vertical section 413 and the third vertical section 415, and the two ends of the third arc section 416 are respectively connected to the third vertical section 415 and the fourth vertical section 417. The first arc segment 412 and the third arc segment 416 have the same bending direction and are both disposed near the top of the box body 110, and the second arc segment 414 has a bending direction opposite to that of the first arc segment 412 and is disposed near the bottom of the box body 110. The first vertical segment 411, the first arc segment 412, and the second vertical segment 413 are installed on the inner side of one of the two box doors 120, the third vertical segment 415, the third arc segment 416, and the fourth vertical segment 417 are installed on the inner side of the other of the two box doors 120, and the second arc segment 414 is located on both of the box doors 120.

[0061] It should be understood that the first heating tube 410 can be a metal tube, which generates heat when powered on, thereby drying the test sample 001.

[0062] In addition, the first heating tube 410 can be fixed to the cabinet door 120 by buckles.

[0063] Optionally, the second heating tube 420 is passed through the riser 210 . The second heating tube 420 may be a metal tube, which generates heat when powered on, thereby transferring the heat through the riser 210 and the heat dissipation holes on the riser 210 to dry the test sample 001 .

[0064] It should be understood that the first heating tube 410 extends around the multiple samples to be tested 001 and can heat the outer sides of the multiple samples to be tested 001. The second heating tube 420 is located in the vertical tube 210, and the multiple samples to be tested 001 are arranged around the vertical tube 210. The second heating tube 420 can heat the inner sides of the multiple samples to be tested 001 at the same time. In this way, the first heating tube 410 and the second heating tube 420 cooperate to make the samples to be tested 001 heated evenly, and it is not easy to have local temperatures that are too high or too low, and the drying effect is good.

[0065] In this embodiment, the air drying device 500 optionally includes a plurality of air outlet pipes, the air outlet pipes are distributed in the dry-wet cycle test box 100, a plurality of air outlet holes are arranged on the pipe wall of the air outlet pipe, the air outlet pipe is connected to the fan, and the air outlet holes can discharge air from multiple directions and blow it to the sample to be tested 001 for air drying. For example, part of the air outlet pipes can be connected to the vertical pipe 210, and the air is discharged from the heat dissipation holes of the vertical pipe 210 and blown to the inside of the sample to be tested 001, and part of the air outlet pipes can be installed on the box door 120 and blown to the outside of the sample to be tested 001, so that the air drying effect is good.

[0066] Please combine Figure 3 In this embodiment, the liquid storage tank 300 optionally includes a tank body 310 and a cover body 320. The tank body 310 is provided with a water storage tank. The cover body 320 is connected to the tank body 310 and can open or close the notch of the water storage tank. The bottom wall of the water storage tank is provided with a water guide slope 311. The water guide slope 311 can be a conical surface. The bottom wall of the tank body 310 is provided with a drainage hole 312 located at the lower side of the water guide slope 311. The position of the drainage hole 312 is located at the lowest position of the bottom wall. The water outlet 111 of the dry-wet cycle test box 100 is connected to the tank body 310 through the pipeline 112. The drainage hole 312 can discharge the solution. A water valve can be set at the drainage hole 312 to control the drainage state. Since the drainage hole 312 is located at a lower position, the solution is not easy to remain in the liquid storage tank 300, and there is no need to manually scoop out the solution, which reduces the labor intensity and improves the operation efficiency; and it is not easy for the solution to accumulate in the liquid storage tank 300 and corrode the liquid storage tank 300.

[0067] In this embodiment, optionally, the control box 600 can be installed on the side of the box body 310, and the control box 600 can be configured with a control panel 610 and a display screen. The control panel 610 can be a keypad or a touchpad, etc., which is convenient for adjusting the working status, and the display screen can display the working parameters of each component to facilitate regulation.

[0068] The concrete sample dry-wet cycle test equipment provided in this embodiment can heat the outside and inside of the test sample 001 placed on the positioning device 200 at the same time through the cooperation of the first heating tube 410 and the second heating tube 420. In this way, the heating area of ​​the test sample 001 is large, the heating is uniform, the heating efficiency is high, the temperature environment of multiple test samples 001 is basically the same, the test result of the test sample 001 is less affected by the temperature environment, and the test result is highly accurate.

[0069] This embodiment also provides a concrete sample dry-wet cycle test method, which is applicable to the above concrete sample dry-wet cycle test equipment, and the method comprises the following steps:

[0070] Check whether the control panel 610 can control the first heating tube 410, the second heating tube 420 and the drain valve 113 to enter a normal working state. If not, adjust them to a normal state.

[0071] High-purity sulfate liquid and water are introduced into the liquid storage tank 300 to quantitatively prepare a diluted sulfate liquid with a concentration of 5%.

[0072] The box door 120 is opened, and the test sample 001 to be tested is placed in the positioning groove of the supporting grid 230 , and then the box door 120 is closed.

[0073] After inputting relevant parameters in the control panel 610 , the test equipment is started.

[0074] The drain valve 113 is energized to introduce the sulfate solution diluted to 5% into the dry-wet cycle test chamber 100. When the liquid level displayed on the liquid level meter 130 completely immerses the top layer of the test sample 001, the drain valve 113 is closed and the wetting process begins.

[0075] After the specified wetting time, the drainage process begins, the drain valve 113 is opened, and the sulfate solution is guided back from the dry-wet cycle test box 100 to the liquid storage tank 300 .

[0076] After the specified drainage time, the test sample 001 is first air-dried for a specified time by the air-drying device 500, and then the high-temperature drying process begins. The first heating tube 410 and the second heating tube 420 cooperate with each other, and the two can work simultaneously to perform high-temperature drying on the test sample 001 until the specified drying time, and finally cool it for a specified time, and a cycle ends.

[0077] After the entire dry-wet cycle test is completed, the box door 120 is opened and all the test samples 001 are taken out for subsequent tests.

[0078] In the concrete sample dry-wet cycle test method provided in this embodiment, the test sample 001 is heated evenly, and is not prone to local high or low temperatures. The drying effect is good, which is beneficial to subsequent experiments.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry-wet cycle test equipment for concrete samples, characterized in that: include: A dry-wet cycle test box (100), a positioning device (200), a liquid storage tank (300) and a heating device (400); the dry-wet cycle test box (100) is connected to the liquid storage tank (300), and the liquid storage tank (300) is used to transport liquid to the dry-wet cycle test box (100) or to collect liquid discharged from the dry-wet cycle test box (100); the positioning device (200) is installed in the dry-wet cycle test box (100), and the positioning device (200) is used to position a sample to be tested (001); the heating device (400) comprises a first heating tube (410) and a second heating tube (420), and the first heating tube (410) and the second heating tube (420) are both arranged in the dry-wet cycle test box (100), and the two cooperate to heat the inner side and the outer side of the sample to be tested (001).

2. The dry-wet cycle test equipment for concrete samples according to claim 1, characterized in that: The first heating tube (410) is configured as a bent tube, and at least a portion of the first heating tube (410) extends in the axial direction of the dry-wet cycle test box (100).

3. The dry-wet cycle test equipment for concrete samples according to claim 2, characterized in that: The first heating tube (410) is arranged around the positioning device (200) in the circumferential direction of the dry-wet cycle test box (100).

4. The dry-wet cycle test equipment for concrete samples according to claim 1, characterized in that: The dry-wet cycle test box (100) comprises a box body (110) and two box doors (120), wherein the box body (110) is provided with an operation port, and the two box doors (120) are rotatably matched with the box body (110), and the two box doors (120) are used to close the operation port, and when the two box doors (120) are used to close the operation port, the box body (110) and the two box doors (120) cooperate to define a soaking chamber for storing a solution.

5. The dry-wet cycle test equipment for concrete samples according to claim 4, characterized in that: The first heating tube (410) is distributed on the two cabinet doors (120) at the same time.

6. The dry-wet cycle test equipment for concrete samples according to claim 1, characterized in that: The positioning device (200) comprises a vertical pipe (210), a plurality of holders (220) and a bearing grid (230); the vertical pipe (210) is fixed in the dry-wet cycle test chamber (100); the plurality of holders (220) are all fixed to the vertical pipe (210); the plurality of holders (220) are arranged at intervals in the axial direction of the vertical pipe (210); the bearing grid (230) is connected to one of the plurality of holders (220); the bearing grid (230) is used to position a sample to be tested (001); and the second heating tube (420) is passed through the vertical pipe (210).

7. The dry-wet cycle test equipment for concrete samples according to claim 6, characterized in that: A plurality of heat dissipation holes are arranged on the tube wall of the vertical tube (210).

8. The dry-wet cycle test equipment for concrete samples according to claim 1, characterized in that: The bottom wall of the liquid storage tank (300) is arranged as a water guiding slope (311), and a drainage hole (312) penetrating the bottom wall is arranged on the lower side of the water guiding slope (311).

9. The dry-wet cycle test equipment for concrete samples according to claim 1, characterized in that: The bottom of the dry-wet cycle test box (100) is connected to the liquid storage tank (300), and the height of the water outlet hole (111) of the dry-wet cycle test box (100) is higher than the height of the drainage hole (312) of the liquid storage tank (300).

10. A method for testing dry-wet cycles of concrete specimens, characterized in that: The dry-wet cycle test equipment for concrete specimens according to any one of claims 1 to 9, the method comprising: Placing a sample to be tested (001) on a positioning device (200); The solution in the liquid storage tank (300) is transported to the dry-wet cycle test chamber (100); After the sample to be tested (001) is immersed for a set time, the solution in the dry-wet cycle test chamber (100) is discharged into the liquid storage tank (300); After the solution in the dry-wet cycle test box (100) is discharged, the sample to be tested (001) is first air-dried, and then the sample to be tested (001) is dried using a heating device (400).

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