Special concrete shrinkage test device

Abstract

The utility model discloses a special concrete shrinkage test device. The special concrete shrinkage test device comprises a test box and a base, by adopting the temperature sensor, the humidity sensor, the electric heating tube, the exhaust fan, the atomization box and the refrigerator, after a concrete block is placed, the test box can be sealed through the sealing door, and then the temperature and the humidity in the test box can be detected through the temperature sensor and the humidity sensor; when the temperature and humidity are different from the set conditions, the internal temperature can be regulated and controlled through operation of the electric heating pipe and the refrigerator, meanwhile, atomized water can be added into the box body through the atomizer, so that the internal humidity is improved, internal gas can be pumped out through operation of the exhaust fan, the internal humidity is reduced, and the temperature and humidity of the box body are improved. Through cooperative use of a plurality of groups of structures, the temperature and humidity can be regulated and controlled, so that the test environment is within a certain range, the influence of environmental fluctuation on the test effect is avoided, and the device has the advantages of high detection precision and test environment control.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete performance detection, and specifically to a shrinkage test device for special concrete. Background Technique

[0002] Special concrete refers to cement concrete made of new materials, industrial waste, or new processes with special uses. When concrete is affected by the external environment, it will expand and shrink, resulting in cavity cracking. Therefore, it is necessary to test the shrinkage of concrete.

[0003] In the existing publicly known technology, the application number is: CN202223218322.2, a shrinkage test device for special concrete. Through the mutual cooperation of components such as a motor, a threaded rod, a threaded sleeve, a cylinder, a main rod, a sub-rod, a connecting rod, a first clamp, and a second clamp, good fixing effects and the effect of automatically transporting concrete can be achieved.

[0004] However, the above patent still has certain disadvantages when in use: during the test process, the concrete block is clamped and fixed by the first clamp and the second clamp, resulting in a relatively limited amplitude for the concrete to shrink or expand. However, in the actual process, the concrete needs to overcome the static friction or sliding friction between its bottom and the upper surface of the table to deform outward. The sliding friction that the above patent's concrete needs to overcome is large, resulting in a poor accuracy in detecting the expansion amount of the concrete. Moreover, the positions of the structures are fixed and cannot be changed according to the length of the concrete block to be detected, resulting in a limited application range of the device. And the entire test equipment is directly exposed, making the test environment prone to change, resulting in poor test accuracy. The main impacts of environmental changes are as follows: for example, most calibration rods on the market are made of stainless steel, and the linear expansion coefficient of stainless steel calibration rods is very large, which is prone to errors due to temperature fluctuations. And humidity has a great influence on the shrinkage of concrete. When the humidity is small, that is, the environment is relatively dry, the concrete loses water and dries quickly, resulting in an increase in dry shrinkage. To sum up, due to environmental changes, it is easy to cause deviations in each test result, thereby affecting the overall use effect.

[0005] Regarding the problems in the related technology, no effective solutions have been proposed yet. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] In view of the deficiencies of the existing technology, the utility model provides a shrinkage test device for special concrete, which has the advantages of high detection accuracy, test environment control, and wide application range, thereby solving the problems in the above background technology.

[0008] (2) Technical solution

[0009] To achieve the advantages of high detection accuracy, test environment control, and wide application range, the specific technical solution adopted by the present utility model is as follows:

[0010] A special concrete shrinkage test device, including a test chamber and a base. In the middle position at the top inside the test chamber, a temperature sensor and a humidity sensor are respectively installed. On both sides at the top inside the test chamber, a number of groups of electric heating tubes are symmetrically installed. Between every two electric heating tubes, a refrigerator is installed. On the top position of one side surface inside the test chamber, a mounting plate is fixedly installed. On the surface of the mounting plate, a number of groups of air injection holes are provided. On one side at the top of the test chamber, an atomization chamber is installed. One end of the atomization chamber is provided with a delivery pipe, and the other end of the delivery pipe is connected to the mounting plate. In the middle position at the top of the test chamber, an exhaust fan is installed, and the air inlet position of the exhaust fan is located on the surface at the top inside the test chamber.

[0011] Furthermore, on one side at the bottom inside the test chamber, a moving plate is slidably connected. At one end of the moving plate, a number of groups of third electric push rods are symmetrically installed, and the other end of the third electric push rods is fixedly connected to the inner wall of the test chamber. In the middle position on the surface of the moving plate, a moving seat is slidably connected. In the middle position inside the moving seat, an adjusting screw is installed through. On the middle position of one side surface of the moving seat, a first ejector rod is installed. On the other side at the bottom inside the test chamber, a test plate is fixedly installed. In the middle position on the surface of the test plate, an adjusting seat is slidably connected. On both sides at the bottom of the adjusting seat, a first electric push rod is symmetrically installed. On the top position of the adjusting seat, a dial indicator is installed, and one end of the dial indicator passes through one side of the adjusting seat and is connected to a second ejector rod.

[0012] Furthermore, in the middle position at the bottom inside the test chamber, an adjusting groove is provided. At both ends inside the adjusting groove, a second electric push rod is symmetrically installed. At one end position of the second electric push rod, an adjusting baffle is fixedly installed, and the adjusting baffle is slidably connected to the adjusting groove.

[0013] Furthermore, on both sides of the adjusting groove, on the surface at the bottom inside the test chamber, a number of groups of bearing seats are evenly installed. On the top surface of the bearing seats, a roller is rotatably connected, and a number of groups of balls are rollingly connected on the surface of the roller.

[0014] Furthermore, on one side surface of the test chamber, a sealing door is rotatably connected. On the surface of the sealing door, an observation window is installed. On the other side surface of the test chamber, a sealing groove is provided.

[0015] Furthermore, at the bottom position of the test chamber, a base is fixedly installed.

[0016] Further, the hot end of the cooler is located on the outer surface of the test chamber, and the cold end is located on the inner surface of the test chamber.

[0017] Further, the test chamber is electrically connected to an external control terminal through a wire.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the special concrete shrinkage test device provided by the present utility model has the following beneficial effects:

[0020] (1) By adopting a temperature sensor, a humidity sensor, an electric heating tube, a suction fan, an atomization box, and a cooler, after the concrete blocks are placed, the test chamber can be closed through the sealing door to avoid the intrusion of external substances, so that the environment in the test chamber can be isolated from the external environment to a certain extent. Then, the temperature and humidity in the test chamber can be detected by the temperature sensor and humidity sensor inside the test chamber. When the temperature and humidity are different from the set conditions, the internal temperature can be regulated by the operation of the electric heating tube and the cooler to avoid the influence of temperature changes on the linear expansion coefficients of the first ejector rod and the second ejector rod during use. At the same time, the operation of the atomizer can add atomized water into the box body to increase the internal humidity, and the operation of the suction fan can extract the internal gas to reduce the internal humidity. Through the combined use of multiple sets of structures, the internal temperature and humidity can be regulated accordingly, so that the test environment is within a certain range, avoiding the influence of environmental fluctuations on the test effect, and having the advantages of high detection accuracy and test environment control.

[0021] (2) By adopting a third electric push rod and a moving plate, during actual use, personnel can control the third electric push rod according to the different sizes of the special concrete to be tested, so as to adjust the position of the moving plate, thereby changing the distance between the moving plate and the test plate, facilitating personnel to place the special concrete block to be tested on the roller at the top of the bearing seat, enabling the device to test concrete blocks of different sizes, expanding the overall scope of application, and having the advantage of a wide scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1It is a schematic structural diagram of a special concrete shrinkage test device proposed by the present utility model;

[0024] Figure 2 It is a schematic internal structure diagram of the bearing seat of the present utility model;

[0025] Figure 3 It is a connection schematic diagram of the moving seat and the first ejector rod of the present utility model;

[0026] Figure 4 It is a connection schematic diagram of the mounting plate and the delivery pipe of the present utility model.

[0027] In the figure:

[0028] 1. Test chamber; 2. First electric push rod; 3. Micrometer; 4. Adjustment groove; 5. Second electric push rod; 6. Ball; 7. Bearing seat; 8. Roller; 9. First ejector rod; 10. Moving seat; 11. Moving plate; 12. Base; 13. Sealing groove; 14. Third electric push rod; 15. Air jet hole; 16. Mounting plate; 17. Electric heating tube; 18. Adjusting screw; 19. Atomizing chamber; 20. Delivery pipe; 21. Temperature sensor; 22. Humidity sensor; 23. Exhaust fan; 24. Adjusting baffle; 25. Refrigerator; 26. Second ejector rod; 27. Test plate; 28. Adjusting seat; 29. Observation window; 30. Sealing door. Specific embodiments

[0029] To further illustrate the embodiments, the present utility model provides accompanying drawings, which are part of the disclosure of the present utility model. They are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0030] According to an embodiment of the present utility model, a special concrete shrinkage test device is provided.

[0031] Now, the present utility model will be further described in conjunction with the accompanying drawings and specific embodiments, as Figures 1-4As shown in the figure, a special concrete shrinkage test device according to an embodiment of the present utility model includes a test box 1 and a base 12. A temperature sensor 21 and a humidity sensor 22 are respectively installed at the middle position of the top end inside the test box 1. A number of groups of electric heating tubes 17 are symmetrically installed at both sides of the top end inside the test box 1. A refrigerator 25 is installed between two adjacent electric heating tubes 17. An installation plate 16 is fixedly installed at the top position of one side surface inside the test box 1. A number of groups of air injection holes 15 are formed on the surface of the installation plate 16. An atomization box 19 is installed at one side position of the top of the test box 1. One end of the atomization box 19 is installed with a conveying pipe 20, and the other end of the conveying pipe 20 is connected to the installation plate 16. A suction fan 23 is installed at the middle position of the top of the test box 1. The air inlet position of the suction fan 23 is located at the surface of the top end inside the test box 1. The suction fan 23 is provided to weaken the humidity by pumping out the gas inside the box. And an atomizer is provided inside the atomization box 19, which can increase the humidity inside the box by atomized water, so as to ensure the constancy of the humidity inside the box, ensure the stability of the test environment, and improve the overall test effect.

[0032] In one embodiment, a moving plate 11 is slidably connected to one side position of the bottom end inside the test box 1. A number of groups of third electric push rods 14 are symmetrically installed at one end of the moving plate 11, and the other end of the third electric push rods 14 is fixedly connected to the inner wall of the test box 1. A moving seat 10 is slidably connected to the middle position of the surface of the moving plate 11. An adjusting screw rod 18 is installed through the middle position inside the moving seat 10. A first ejector rod 9 is installed at the middle position of one side surface of the moving seat 10. A test plate 27 is fixedly installed at the other side position of the bottom end inside the test box 1. An adjusting seat 28 is slidably connected to the middle position of the surface of the test plate 27. A first electric push rod 2 is symmetrically installed at both sides of the bottom of the adjusting seat 28. A dial indicator 3 is installed at the top position of the adjusting seat 28. One end of the dial indicator 3 penetrates through one side of the adjusting seat 28 and is connected to a second ejector rod 26. The dial indicator 3 can adopt a digital display model, and the dial indicator 3 is a basic component for the concrete shrinkage test, so no more details will be described.

[0033] In one embodiment, an adjusting groove 4 is formed at the middle position of the bottom end inside the test box 1. Second electric push rods 5 are symmetrically installed at both ends of the inside of the adjusting groove 4. An adjusting baffle 24 is fixedly installed at one end of the second electric push rod 5. The adjusting baffle 24 is slidably connected to the adjusting groove 4. The adjusting baffle 24 is provided to adjust the special concrete block to be tested by moving it to the middle position, which is convenient for subsequent contact testing by multiple groups of ejector rods.

[0034] In one embodiment, a number of groups of bearing seats 7 are evenly installed on both sides of the adjustment groove 4 at the position of the inner bottom surface of the test chamber 1. A roller 8 is rotatably connected to the top surface of the bearing seat 7. A number of groups of balls 6 are rollingly connected to the surface of the roller 8. The roller 8 and the balls 6 are provided to facilitate the movement and adjustment of the concrete to be tested. When the concrete block shrinks or expands and deforms, relative rolling occurs between the roller 8 and the balls 6 and the concrete block. Compared with traditional static friction or sliding friction, the frictional force of rolling friction is smaller, and it is easier to reflect the tiny shrinkage or expansion amount of the concrete on the dial indicator 3, improving the detection accuracy.

[0035] In one embodiment, a sealing door 30 is rotatably connected to one side surface of the test chamber 1. An observation window 29 is installed on the surface of the sealing door 30. A sealing groove 13 is formed on the other side surface of the test chamber 1. The sealing door 30 is provided to enclose the inside of the test chamber 1 during the test to avoid interference from the external environment. The sealing groove 13 is provided to be docked with the sealing strip provided on the surface of the sealing door 30, thereby enhancing the overall sealing performance. The sealing strip is provided at the corresponding position of the sealing door 30 for convenient subsequent use. The observation window 29 is provided for convenient observation by personnel.

[0036] In one embodiment, a base 12 is fixedly installed at the bottom of the test chamber 1. The device as a whole can be fixed through the base 12 to facilitate enhancing the overall stability.

[0037] In one embodiment, the hot end of the cooler 25 is located on the outer surface of the test chamber 1, and the cold end is located at the position of the inner surface of the test chamber 1. The cooler 25 is provided to cool the inside of the test chamber 1, thereby realizing the regulation of the internal temperature and ensuring the stability of the test environment.

[0038] In one embodiment, the test chamber 1 is electrically connected to an external control terminal through a wire. The connection of the external control terminal is for controlling the equipment inside the test chamber 1, such as the temperature sensor 21, the humidity sensor 22, and multiple groups of electric push rods, etc. Since the types of external control terminals are diverse and the application technologies are mature, personnel can realize the control of the equipment through programming, so no more details are given.

[0039] Working principle: During actual use, personnel can control the third electric push rod 14 according to the different sizes of the special concrete to be tested, so as to adjust the position of the moving plate 11, thereby changing the distance between the moving plate 11 and the test plate 27, which facilitates personnel to place the special concrete block to be tested on the roller 8 at the top of the bearing seat 7. When the concrete shrinks or expands and deforms subsequently, relative rolling occurs between the roller 8 and the concrete block. Compared with traditional static friction or sliding friction, the frictional force of rolling friction is smaller, and it is easier to reflect the tiny concrete shrinkage or expansion amount on the dial indicator 3, improving the detection accuracy. Then, after the concrete block is placed, the adjusting screws 18 and the first electric push rods 2 on both sides can be controlled separately according to the overall height of the concrete block, so that the heights of the moving seat 10 and the adjusting seat 28 change. Then, by operating the telescopic movement of the second electric push rods 5 on both sides, the positions of the adjusting baffles 24 on both sides can be changed, so as to adjust the concrete block to the middle position of the test chamber 1, so that the connected first ejector rod 9 and the second ejector rod 26 can move to the middle position of the surface of the concrete block. Then, the shrinkage change can be tested through the dial indicator 3. After the concrete block is placed, the test chamber 1 can be closed through the sealing door 30 to prevent the intrusion of external substances, so that the environment in the test chamber 1 can be isolated from the external environment to a certain extent. Then, the temperature and humidity in the test chamber 1 can be detected through the temperature sensor 21 and the humidity sensor 22 inside the test chamber 1. When the temperature and humidity are different from the set conditions, the electric heating tubes 17, the cooler 25, the atomizing box 19 and the exhaust fan 23 can be correspondingly turned on. By operating the electric heating tubes 17 and the cooler 25, the internal temperature can be regulated to prevent the change of temperature from affecting the linear expansion coefficient when the first ejector rod 9 and the second ejector rod 26 are used. At the same time, by operating the atomizer, atomized water can be added to the inside of the box to increase the internal humidity, and by operating the exhaust fan 23, the internal gas can be extracted, thereby reducing the internal humidity. Through the combined use of multiple groups of structures, the internal temperature and humidity can be regulated accordingly, so that the test environment is within a certain range, preventing environmental fluctuations from affecting the test effect and improving the overall test effect. The device as a whole has the advantages of high detection accuracy, test environment control and wide application range.

[0040] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A special concrete shrinkage test device, comprising a test box (1) and a base (12), characterized in that: A temperature sensor (21) and a humidity sensor (22) are respectively installed at the middle position of the top of the interior of the test box (1); a plurality of groups of electric heating tubes (17) are symmetrically installed at both sides of the top of the interior of the test box (1); a refrigerator (25) is installed between the two electric heating tubes (17); a mounting plate (16) is fixedly installed at the top position of one side surface of the interior of the test box (1); a plurality of groups of air injection holes (15) are opened at the surface of the mounting plate (16); an atomization box (19) is installed at one side of the top of the test box (1); a delivery pipe (20) is installed at one end of the atomization box (19); the other end of the delivery pipe (20) is connected to the mounting plate (16); an exhaust fan (23) is installed at the middle position of the top of the test box (1); the air inlet of the exhaust fan (23) is located at the top surface of the interior of the test box (1).

2. The special concrete shrinkage test device according to claim 1, characterized in that: A movable plate (11) is slidably connected to one side of the bottom end of the test box (1), and a plurality of third electric push rods (14) are symmetrically mounted on one end of the movable plate (11). The other end of the third electric push rod (14) is fixedly connected to the inner wall of the test box (1). A movable seat (10) is slidably connected to the middle position of the surface of the movable plate (11). An adjusting screw (18) is installed through the middle position of the inside of the movable seat (10). A first push rod (9) is installed in the middle position of one side of the surface of the movable seat (10). A test plate (27) is fixedly mounted on the other side of the bottom end of the test box (1). An adjusting seat (28) is slidably connected to the middle position of the surface of the test plate (27). First electric push rods (2) are symmetrically mounted on both sides of the bottom of the adjusting seat (28). A micrometer (3) is installed at the top of the adjusting seat (28). One end of the micrometer (3) passes through one side of the adjusting seat (28) and is connected to a second push rod (26).

3. The special concrete shrinkage test device according to claim 1, characterized in that: An adjustment slot (4) is provided at the middle of the bottom end of the test box (1), and second electric push rods (5) are symmetrically installed at both ends of the adjustment slot (4). An adjustment baffle (24) is fixedly installed at one end of the second electric push rod (5), and the adjustment baffle (24) is slidably connected to the adjustment slot (4).

4. The special concrete shrinkage test device according to claim 3, characterized in that: A plurality of groups of bearing seats (7) are evenly installed on both sides of the adjustment groove (4) at the bottom surface position inside the test box (1), and a roller (8) is rotatably connected to the top surface position of the bearing seat (7), and a plurality of groups of balls (6) are rollingly connected to the surface position of the roller (8).

5. The special concrete shrinkage test device according to claim 1, characterized in that: A sealing door (30) is rotatably connected to the surface of one side of the test box (1), an observation window (29) is installed on the surface of the sealing door (30), and a sealing groove (13) is opened on the surface of the other side of the test box (1).

6. The special concrete shrinkage test device according to claim 1, characterized in that: A base (12) is fixedly installed at the bottom of the test box (1).

7. The special concrete shrinkage test device according to claim 1, characterized in that: The hot end of the refrigerator (25) is located on the outer surface of the test box (1), and the cold end is located on the inner surface of the test box (1).

8. The special concrete shrinkage test device according to claim 1, characterized in that: The test box (1) is electrically connected to an external control terminal via a wire.

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