Device for testing frost resistance of cement-based material

Abstract

The utility model relates to a cement-based material anti-freezing performance testing device which comprises a box body and a box cover of a heat preservation testing box, the box cover covers the upper portion of the box body in a buckled mode, the left end and the right end of the inner side of the box body are fixedly connected with fan supports respectively, and transverse fans are arranged on the upper portions of the fan supports. A horizontal and continuous S-shaped heat exchange coil pipe is inserted into the middle of the inner side of the box body, and the two ends of the heat exchange coil pipe are located on the front side and the rear side of the fan support and are fixedly inserted into the box wall of the box body; the upper end faces of the cushion blocks are located on the upper side of the heat exchange coil pipe, and the lower ends of the cushion blocks are fixedly connected to the bottom face of the inner side of the box body. A fan timer is fixedly connected to the front end face of the box cover, and the fan timer is electrically connected with the fan through a cable and controls the running time of the fan. The testing device can simulate the influence of wind erosion on the performance of the cement-based material under the freezing condition.

Description

Technical field:

[0001] The utility model relates to the technical field of an antifreeze performance testing device, and more specifically to an antifreeze performance testing device for cement-based materials. Background technology:

[0002] In the cold regions of my country, the use of cement-based materials is subjected to severe tests, especially in extreme cold conditions, where freeze-thaw cycles cause the surface to peel off, reduce durability, and even cause direct structural damage, greatly shortening its service life. Therefore, antifreeze performance tests are required when preparing related materials. The traditional antifreeze performance test device for cement-based materials only has a single freezer to simulate the freezing scene. For example, as stated in Chapter 11 of JGJ / T70-2009 "Standard for Basic Performance Test Methods of Building Mortar", it does not consider the situation in which the material will be eroded by wind and rain in actual applications. The disclosed patent CN215066283U simulates the rain scene, and the patent CN 219758128 U is only an improvement on the patent CN215066283U, and does not consider the impact of wind erosion on the performance of cement-based materials under freezing conditions. Utility model content:

[0003] The purpose of the utility model is to address the deficiencies of the prior art and to provide a cement-based material antifreeze performance testing device, which can simulate the influence of wind erosion on the performance of cement-based materials under freezing conditions.

[0004] A device for testing the antifreeze performance of cement-based materials, comprising a box body and a box cover of a heat preservation test box, the box cover is buckled on the upper part of the box body, the left and right ends of the inner side of the box body are respectively fixedly connected with fan brackets, and a horizontal fan is arranged on the upper part of the fan bracket; a horizontal and continuous S-shaped heat exchange coil is inserted in the middle part of the inner side of the box body, and the two ends of the heat exchange coil are located at the front and rear sides of the fan bracket and are respectively plugged and fixed on the box wall of the box body; a plurality of pads are plugged and fixed on the heat exchange coil, and the upper end surface of the pads is located on the upper side of the heat exchange coil, and the lower end is fixed to the bottom surface of the inner side of the box body; a fan timer is fixedly connected to the front end surface of the box cover, and the fan timer is electrically connected to the fan through a cable and controls the running time of the fan;

[0005] The fan bracket comprises a longitudinal base plate, the front and rear sides of the base plate are respectively fixedly connected with vertical steel trough-shaped fixed support columns, a vertical guide groove is formed on the fixed support column, a dynamic support column is inserted in the fixed support column, the fan is inserted at the upper end of the dynamic support column, ear seats are formed on the outer walls of both sides of the air guide tube on the fan, and the upper end of the dynamic support column is inserted with locking bolts, which are respectively screwed on the ear seats on both sides of the fan; a longitudinal connecting shaft is inserted and fixed between the lower ends of the dynamic support columns, and the two ends of the connecting shaft pass through the guide groove of the fixed support column and are fixed with a limiting sleeve, and the limiting sleeves respectively rest on the side walls of the fixed support column; a horizontal connecting block is formed on the limiting sleeve on one side of the fan bracket, a vertical stud is screwed on the connecting block, the lower end of the stud is pivotally connected to the base plate, and the upper end sleeve is fixed with a knob.

[0006] Preferably, two ends of the heat exchange coil extend out of the outer wall of the box body and are fixedly connected to refrigeration pipelines of a refrigeration device.

[0007] Preferably, the cushion blocks are distributed in a linear array in the box body, arc-shaped grooves are formed on the outer walls of the front and rear sides of the cushion blocks, and the tube bodies of the heat exchange coils are clamped in the grooves of the cushion blocks.

[0008] Preferably, a rectangular net basket is inserted into the box, and the net basket abuts against the upper end surface of the cushion block.

[0009] Preferably, the fan timer is provided with a display screen, and a start / stop button, a minute button and a second button are provided on one side of the display screen.

[0010] Preferably, a thermal insulation interlayer is provided in the box cover and the box body respectively.

[0011] Preferably, a temperature sensor is inserted into the box, the temperature sensor is electrically connected to a temperature display via a cable, and the temperature display is fixedly connected to the front end surface of the box.

[0012] The beneficial effects of the utility model are:

[0013] This test device can simulate the influence of wind erosion on the performance of cement-based materials under freezing conditions. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model in a front view;

[0015] Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure at A-A in the middle;

[0016] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at B-B in the middle.

[0017] In the figure: 1. box body; 2. box cover; 3. fan; 4. fan bracket; 5. temperature display; 6. temperature sensor; 7. fan timer; 8. heat exchange coil; 9. pad. Specific implementation method:

[0018] Example: See Figures 1 to 3 As shown, a test device for antifreeze performance of cement-based materials comprises a box body 1 and a box cover 2 of a heat preservation test box, the box cover 2 is buckled on the upper part of the box body 1, and fan brackets 4 are respectively fixedly connected to the left and right ends of the inner side of the box body 1, and a horizontal fan 3 is arranged on the upper part of the fan bracket 4; a horizontal and continuous S-shaped heat exchange coil 8 is inserted in the middle part of the inner side of the box body 1, and the two ends of the heat exchange coil 8 are located at the front and rear sides of the fan bracket 4 and are respectively plugged and fixed on the box wall of the box body 1; a plurality of pads 9 are plugged and fixed on the heat exchange coil 8, and the upper end surface of the pad 9 is located on the upper side of the heat exchange coil 8, and the lower end is fixed to the bottom surface of the inner side of the box body 1; a fan timer 7 is fixedly connected to the front end surface of the box cover 2, and the fan timer 7 is electrically connected to the fan 3 through a cable and controls the running time of the fan 3; the fan 3 is provided with a power cord, and the power cord is inserted into the box body 1;

[0019] The fan bracket 4 includes a longitudinal bottom plate 41, and the front and rear sides of the bottom plate 41 are respectively fixedly connected with vertical steel groove-shaped fixed support columns 42, and the fixed support columns 42 are formed with vertical guide grooves. A dynamic support column 43 is inserted in the fixed support column 42, and the fan 3 is inserted at the upper end of the dynamic support column 43. Ear seats 31 are formed on the outer walls of both sides of the air guide tube on the fan 3. The upper end of the dynamic support column 43 is inserted with locking bolts 44, and the locking bolts 44 are respectively screwed to the ear seats 31 on both sides of the fan 3. The fan bracket 4 is provided with a fan support 40, a fan support 41 and a fan support 42. The fan bracket 40 is provided with a fan support 40, a fan support 40 and a fan support 40. The fan bracket 40 is provided with a fan support 40, a fan support 40 and a fan support 40. The fan bracket 40 is provided with a fan support 40, a fan support 40 and a fan support 40. The fan bracket 40 is provided with a fan support 40, a fan support 40 and a fan support 40. The fan bracket 40 is provided with a fan support 40, a fan support 40 and a fan support 40.

[0020] Both ends of the heat exchange coil 8 extend out of the outer wall of the box body 1 and are fixedly connected to the refrigeration pipeline of the refrigeration equipment. The refrigeration equipment realizes refrigeration and heat exchange in the insulation test box through the heat exchange coil 8, thereby achieving a low temperature state in the insulation test box.

[0021] The cushion blocks 9 are distributed in a linear array in the box body 1 , and arc-shaped grooves 91 are formed on the outer walls of the front and rear sides of the cushion blocks 9 , and the tube bodies of the heat exchange coils 8 are clamped in the grooves 91 of the cushion blocks 9 .

[0022] A rectangular mesh basket is inserted into the box 1, and the mesh basket rests on the upper end surface of the cushion block 9; when the volume of the test sample is large, it can be placed directly on the cushion block, but when the volume of the test sample is small, it needs to be set in the mesh basket and the test sample is placed in the mesh basket.

[0023] The fan timer 7 is provided with a display screen, and a start / stop button, a minute button and a second button are provided on one side of the display screen. The fan 3 can be started and stopped by the start / stop button, the fraction of the timing can be adjusted by pressing the minute button, and the number of seconds of the timing can be adjusted by pressing the second button; the minute button and the second button can be pressed simultaneously to reset the time.

[0024] The box cover 2 and the box body 1 are respectively provided with heat-insulating interlayers to achieve a constant temperature in the box body 1.

[0025] A temperature sensor 6 is inserted into the box body 1 . The temperature sensor 6 is electrically connected to a temperature display 5 via a cable. The temperature display 5 is fixedly connected to the front end surface of the box body 1 .

[0026] Working principle: The utility model is a device for testing the antifreeze performance of cement-based materials. The performance testing device includes a heat preservation test box. Two groups of fans 3 distributed on the left and right are arranged in the heat preservation test box. The fans 3 are set by fan brackets 4. The fans 3 can be adjusted by adjusting the pitch angle and height of the fan brackets 4. The fans 3 in the heat preservation test box can be set diagonally on the horizontal and vertical planes, that is, the fan 3 on the left side of the heat preservation test box can be in a low position and the elevation angle can be adjusted, and the fan 3 on the left side can blow air to the upper right; and the fan 3 on the right side of the heat preservation test box can be in a high position and the pitch angle can be adjusted to blow air to the lower left, so that the wind can contact more outer surfaces of the sample;

[0027] Moreover, in conjunction with the heat exchange coil 8, the temperature in the heat preservation test box is uniform based on the airflow;

[0028] During the test, the fan 3 is mainly started through the fan timer 7. By setting the timing time, after the fan 3 stops running, it is observed whether the sample has problems such as cracking; and the test is mainly carried out by blowing wind for different periods of time on the same type of samples, and then testing the performance of the sample under wind blowing and freezing environment.

[0029] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A device for testing the antifreeze performance of cement-based materials, comprising a box body (1) and a box cover (2) of a heat-insulating test box, wherein the box cover (2) is buckled on the upper part of the box body (1), and is characterized in that: The left and right ends of the inner side of the box body (1) are respectively fixedly connected with fan brackets (4), and a horizontal fan (3) is arranged on the upper part of the fan bracket (4); a horizontal and continuous S-shaped heat exchange coil (8) is inserted in the middle part of the inner side of the box body (1), and the two ends of the heat exchange coil (8) are located at the front and rear sides of the fan bracket (4) and are respectively plugged and fixed on the box wall of the box body (1); a plurality of pads (9) are plugged and fixed on the heat exchange coil (8), and the upper end surface of the pad (9) is located on the upper side of the heat exchange coil (8), and the lower end is fixed to the bottom surface of the inner side of the box body (1); a fan timer (7) is fixedly connected to the front end surface of the box cover (2), and the fan timer (7) is electrically connected to the fan (3) through a cable and controls the running time of the fan (3); The fan bracket (4) comprises a longitudinal bottom plate (41), the front and rear sides of the bottom plate (41) are respectively fixedly connected with vertical steel groove-shaped fixed support columns (42), a vertical guide groove is formed on the fixed support column (42), a dynamic support column (43) is inserted in the fixed support column (42), the fan (3) is inserted at the upper end of the dynamic support column (43), the outer walls of both sides of the air guide tube on the fan (3) are formed with ear seats (31), the upper end of the dynamic support column (43) is inserted with locking bolts (44), and the locking bolts (44) are respectively screwed to the ear seats on both sides of the fan (3). (31); a longitudinal connecting shaft (45) is inserted and fixed between the lower ends of the movable support columns (43), and the two ends of the connecting shaft (45) pass through the guide grooves of the fixed support columns (42) to be fixed with limit sleeves (46), and the limit sleeves (46) respectively abut against the side walls of the fixed support columns (42); a horizontal connecting block (461) is formed on the limit sleeve (46) on one side of the fan bracket (4), and a vertical stud (47) is screwed on the connecting block (461), and the lower end of the stud (47) is pivotally connected to the bottom plate (41), and the upper end of the plug sleeve is fixedly connected with a knob (48).

2. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: Both ends of the heat exchange coil (8) extend out of the outer wall of the box body (1) and are fixedly connected to refrigeration pipelines of refrigeration equipment.

3. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: The cushion blocks (9) are distributed in a linear array in the box body (1); arc-shaped grooves (91) are formed on the outer walls of the front and rear sides of the cushion blocks (9); and the tube body of the heat exchange coil (8) is clamped in the grooves (91) of the cushion blocks (9).

4. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: A rectangular net basket is inserted into the box body (1), and the net basket abuts against the upper end surface of the cushion block (9).

5. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: The fan timer (7) is provided with a display screen, and a start / stop button, a minute button and a second button are provided on one side of the display screen.

6. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: The box cover (2) and the box body (1) are respectively provided with a heat-insulating interlayer.

7. A cement-based material antifreeze performance testing device according to claim 1, characterized in that: A temperature sensor (6) is inserted into the box (1), and the temperature sensor (6) is electrically connected to a temperature display (5) via a cable. The temperature display (5) is fixedly connected to the front end surface of the box (1).

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