Synchronous detection device for temperature, humidity and restrained expansion rate of concrete
By designing a synchronous detection device including a curing box, a pressure end plate, a bracket vertical plate, an isolation cylinder and a top cover, the problem of low detection accuracy of concrete temperature, humidity and limited expansion rate in the prior art is solved, and efficient and accurate multi-parameter detection is achieved, which is suitable for the field of concrete inspection.
Patent Information
- Application Number
- CN202422429745.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The prior art cannot realize synchronous detection of the internal temperature and humidity of concrete and the limited expansion rate, resulting in low detection accuracy and large errors, and the inability to simulate the real state of concrete in different environments, affecting the accuracy of the detection results.
A synchronous detection device for concrete temperature and humidity and limited expansion rate is designed, including a curing box, pressure end plate, bracket vertical plate, isolation cylinder and top cover. The temperature, humidity and deformation of concrete are detected simultaneously through internal sensors and displacement sensors, so that multi-parameter data matching and recording can be performed in a closed environment to avoid errors caused by sample handling.
The synchronous detection of temperature and humidity of concrete samples and limited expansion rate is realized, which improves detection accuracy and efficiency, reduces workload, avoids errors caused by environmental changes, and provides more accurate data support.
Smart Images
Figure CN223259727U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete detection, in particular to a synchronous detection device for concrete temperature, humidity and limited expansion rate. Background Art
[0002] The relative temperature and humidity inside concrete are important parameters that trigger concrete volume deformation. Changes in internal temperature and humidity not only lead to changes in the concrete's quality and volume deformation, but also, when the ambient relative temperature and humidity are lower than the relative temperature and humidity inside the concrete, the moisture inside the concrete is lost due to diffusion into the air, causing shrinkage. Concrete also shrinks due to the internal and external temperature gradient. Therefore, establishing the relationship between concrete volume deformation and internal temperature and humidity is of great significance for studying the mechanism and influencing factors of concrete volume deformation.
[0003] Currently, the temperature and humidity inside concrete are detected by inserting a tube inside the concrete and placing a temperature and humidity sensor in the tube. This detection method is commonly used because of its simple operation. However, this method can only measure the temperature and humidity of the concrete during the setting process, and only the opening at the bottom of the tube can connect the sensor to the concrete test block. As a result, the moisture inside the concrete needs to continuously accumulate upwards to fully contact the sensor for detection, resulting in inaccurate detection data.
[0004] However, existing methods for testing the limiting expansion rate require repeatedly placing concrete test blocks on a measuring instrument, resulting in reduced measurement accuracy. Furthermore, concrete volume deformation and internal temperature and humidity are generally tested separately, which not only increases the amount of testing but also affects the accuracy of establishing the relationship between the two, leading to increased errors.
[0005] Now, multi-parameter testing is also required during the entire process of concrete specimen solidification to detect its temperature and humidity more closely to the construction status. In the early stage of concrete, it is in a viscous state, and after a period of time it becomes a semi-solidified state. Later, the concrete needs to be soaked in water for curing, and cured in different temperature and humidity environments. It is even necessary to simulate the curing data of concrete specimens in a closed state. These all-round multi-parameter tests cannot be completed by current testing equipment.
[0006] Based on this, the utility model designs a synchronous detection device for concrete temperature, humidity and limited expansion rate to solve the above problems. Utility Model Content
[0007] The purpose of the utility model is to provide a synchronous detection device for concrete temperature, humidity and limited expansion rate. The device can automatically and synchronously detect the limited expansion rate and internal temperature and humidity data of the tested concrete, and perform data matching. The two parameters are matched and recorded at different time nodes. The concrete sample can be immersed in a curing box, and the sample can also be tested in a closed space under a dry environment. Technical support is provided for further analysis of the deformation mechanism of concrete, and test efficiency and test accuracy are improved. There is no need to repeatedly move the sample, which saves time and effort and avoids errors caused by environmental changes caused by moving the sample. At the same time, the measuring device is reusable, which can effectively avoid waste and save costs.
[0008] The utility model is implemented as follows: a synchronous detection device for concrete temperature, humidity and limited expansion rate, comprising:
[0009] Curing box, pressure end plate, support plate, isolation cylinder and top cover;
[0010] The curing box is a closed box with an open top. A drainage hole and an escape hole are provided on the side wall of the curing box. Sealing plugs are provided on the drainage hole and the escape hole. A frame plate is horizontally provided inside the curing box, and the frame plate is a mesh plate.
[0011] The top cover is a closed cover plate, and the top cover can be detachably covered on the top opening of the curing box;
[0012] The pressure end plate is a flat plate, and the pressure end plate is vertically arranged. A limit rod is horizontally locked between the two pressure end plates. A positioning ring is also provided on the limit rod. The limit rod and the positioning ring are an integral structure. The positioning ring is a horizontally arranged circular ring, and the inner hole of the positioning ring penetrates the upper and lower sides thereof.
[0013] The support plate is a flat plate, each of the pressure end plates is locked with a support plate, and a displacement sensor is provided between the two support plates;
[0014] The isolation tube is a straight tube with openings at both ends. A ventilation window is also provided on the side wall of the lower end of the isolation tube, and the ventilation window communicates with the inner and outer sides of the isolation tube.
[0015] An isolation plug is provided at the bottom of the isolation cylinder, and the isolation plug seals the lower end opening of the isolation cylinder and the vent opening;
[0016] A sealing plug is also provided on the top of the isolation cylinder. The sealing plug can be detachably sealed and tightly plugged at the top opening of the isolation cylinder. An internal sensor is provided at the lower end of the sealing plug. The internal sensor can be detachably suspended inside the isolation cylinder.
[0017] Furthermore, the isolation cylinder is a PVC round tube, the diameter of the isolation cylinder is smaller than the inner hole diameter of the positioning ring, and the diameter difference does not exceed 1 cm;
[0018] The positioning ring is sleeved on the outside of the isolation cylinder.
[0019] Furthermore, both ends of the limiting pull rod are threaded rods, and both ends of the limiting pull rod are locked with the pressure end plates on both sides by nuts;
[0020] The positioning ring is arranged at the midpoint of the limiting pull rod.
[0021] Furthermore, positioning ropes are provided at both ends of the displacement sensor, and the displacement sensor is tensioned between the bracket uprights through the positioning ropes.
[0022] Furthermore, the isolation plug and the isolation cylinder are clearance-fitted, and the clearance does not exceed 1 mm;
[0023] The sealing plug is a rubber plug, and the sealing plug and the upper opening of the isolation cylinder are interference fit;
[0024] The upper end of the internal sensor is provided with a straight rod, which penetrates and extends above the sealing plug, and the sealing plug is a rubber plug;
[0025] The internal sensor is a temperature and humidity sensor, and the electrical connection line of the internal sensor is arranged above the isolation cylinder;
[0026] The isolation plug is a cylindrical iron block.
[0027] Furthermore, an environmental sensor is provided on the top of the inner cavity of the curing box, and the environmental sensor is a temperature and humidity sensor.
[0028] Furthermore, a drainage hole is provided at the bottom of the side wall of the curing box, and the height difference between the drainage hole and the bottom of the curing box is between 1-5 cm;
[0029] There are two avoidance holes, both of which are opened on the top of the side wall of the curing box. The two avoidance holes are respectively arranged on the left and right sides of the curing box, and the height interval between the two avoidance holes and the top of the curing box is between 1-3 cm.
[0030] The beneficial effects of the utility model are as follows: 1. The device uses an internal sensor and a displacement sensor to detect the deformation of the concrete sample through the displacement sensor, and the internal temperature and humidity through the internal sensor. There is no need to move or change the environment of the concrete sample, and the restricted expansion rate and the internal temperature and humidity of the concrete sample can be automatically detected synchronously, which is of great significance for studying the mechanism and influencing factors of concrete volume deformation, while reducing workload and avoiding waste;
[0031] 2. The entire test phase of the concrete sample is in the curing box and does not need to be moved, which avoids changing the environment, avoids the impact of the external environment on the concrete sample, and also avoids the impact of the concrete being moved to different locations on its expansion and deformation during the solidification process, effectively reducing the error of the test data.
[0032] 3. After the test device is covered, the concrete specimen can be enclosed in the curing chamber to simulate the effects of a closed or stable environment on the concrete specimen. Environmental sensors and internal sensors are also installed. They can simultaneously measure the internal and external environments of the concrete specimen, and record and compare data at the same time point to achieve multi-parameter data detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0034] Figure 1 This is a schematic diagram of the overall internal structure of the utility model;
[0035] Figure 2 This is a schematic diagram of the structure of the curing box of the utility model;
[0036] Figure 3 This is a schematic diagram of the utility model showing the curing box and the top cover separated;
[0037] Figure 4 This is a schematic diagram of the concrete sample clamped by the pressure end plate and the support vertical plate of the utility model;
[0038] Figure 5 This is a schematic diagram of the top view of the pressure end plate and the limiting pull rod of the utility model;
[0039] Figure 6 This is a structural diagram of the utility model in which the isolation cylinder is installed with an isolation plug;
[0040] Figure 7 This is a structural diagram of the assembly state of the isolation cylinder and the internal sensor of the utility model.
[0041] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0042] 1-Maintenance box, 11-Frame plate, 12-Drain hole, 13-Environmental sensor, 14-Avoidance hole, 2-Pressure end plate, 21-Limiting rod, 22-Positioning ring, 3-Bracket vertical plate, 31-Positioning rope, 32-Displacement sensor, 4-Isolation cylinder, 41-Internal sensor, 42-Isolation plug, 43-Sealing plug, 44-Ventilation window, 5-Top cover. DETAILED DESCRIPTION
[0043] See also Figures 1 to 7As shown, the present invention provides a synchronous detection device for concrete temperature, humidity and limited expansion rate. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0044] In a specific embodiment of the technical solution of the present utility model:
[0045] It includes a curing box 1, a pressure end plate 2, a support plate 3, an isolation tube 4 and a top cover 5;
[0046] The curing box 1 is a closed box with an open top, and a drainage hole 12 and an avoidance hole 14 are provided on the side wall. Sealing plugs are provided on the drainage hole 12 and the avoidance hole 14. A frame plate 11 is horizontally provided inside the curing box 1, and the frame plate 11 is a mesh plate. The frame plate 11 is at one-third of the height of the bottom of the curing box 1, and two-thirds of the height space is reserved at the top of the curing box 1 for placing concrete samples, so as to facilitate the injection of water into the curing box 1 for soaking or watering the concrete samples. The water can pass through the frame plate 11 to completely soak the concrete samples, and can also discharge the water inside the curing box 1 through the drainage hole 12 and seal it, thereby achieving the purpose of testing the concrete samples in a closed environment.
[0047] The drainage hole 12 and the avoidance hole 14 can both be provided on the vertical side wall on the back of the curing box 1. The drainage hole 12 is provided at the bottom of the side wall of the curing box 1. The height difference between the drainage hole 12 and the bottom of the curing box 1 is between 1-5 cm.
[0048] There are two avoidance holes 14, both of which are opened on the top of the side wall of the curing box 1. The two avoidance holes 14 are respectively arranged on the left and right sides of the curing box 1. The height interval between the two avoidance holes 14 and the top of the curing box 1 is between 1-3 cm. There are two avoidance holes 14, and the two avoidance holes 14 are used to avoid and pass the data lines of the displacement sensor 32 and the internal sensor 41, so that the concrete sample can be tested in the closed curing box 1 without moving the sample, thereby ensuring the accuracy of the test data.
[0049] An environmental sensor 13 is also installed at the top of the inner cavity of the curing box 1. The environmental sensor 13 is a temperature and humidity sensor. It is used to detect the temperature and humidity of the air environment inside the curing box 1, match the data of the environment with the data inside the concrete sample, and facilitate the detection of data differences and changes inside and outside the sample.
[0050] The top cover 5 is a closed cover plate, and the top cover 5 can be detachably covered on the top opening of the curing box 1 .
[0051] The pressure end plate 2 is a flat plate, and the pressure end plate 2 is arranged vertically. The two pressure end plates 2 are parallel to each other, and the two bracket vertical plates 3 locked above them can also be parallel to each other, so that the two pressure end plates 2 are horizontally locked at both ends of the limiting rod 21. A positioning ring 22 is also provided on the limiting rod 21. The limiting rod 21 and the positioning ring 22 are an integral structure. The two ends of the limiting rod 21 are threaded rods, and the two ends of the limiting rod 21 are locked to the pressure end plates 2 on both sides by nuts; the two ends of the limiting rod 21 can also adjust the positional relationship with the pressure end plate 2 through nuts, so as to fine-tune different concrete samples to ensure that the pressure end plate 2 can press the concrete sample, simulate the compression state of the template on the concrete sample, and then detect the shrinkage rate of the concrete in the restricted state, rather than simply detecting the concrete sample in the open state.
[0052] The pressure end plate 2 is used to limit and pull during the concrete solidification and forming stage, which is convenient for pre-tightening and limiting the concrete, and pulling it through the limiting pull rod 21 to simulate the expansion force that occurs when the concrete is formed and the resistance between the concrete formwork. Because the concrete sample is already in a solidification and forming state during the test, there is no need to add additional baffles on the other two sides of the concrete sample.
[0053] The positioning ring 22 is a horizontally arranged circular ring, and the inner hole of the positioning ring 22 penetrates its upper and lower sides; the isolation tube 4 is a PVC circular tube, and the diameter of the isolation tube 4 is smaller than the inner hole diameter of the positioning ring 22, and the diameter difference does not exceed 1 cm; the positioning ring 22 is sleeved on the outside of the isolation tube 4. The positioning ring 22 is used to position the isolation tube 4 to prevent the concrete from squeezing the isolation tube 4 and causing it to fall over, ensuring that the isolation tube 4 is placed vertically and keeps its position fixed. The positioning ring 22 is set at the midpoint of the limiting rod 21. Through the position of the positioning ring 22, the position of the isolation tube 4 is kept at the center, and the position of the internal sensor 41 can be kept at the center of the concrete sample. Therefore, the limiting rod 21 is on the line connecting the center points of the two pressure end plates 2, ensuring that the limiting rod 21 is at the center of the two pressure end plates 2, so that the positioning ring 22 is also at the center point of the entire concrete sample, and thus the internal sensor 41 is at the center point of the concrete for effective detection.
[0054] The support plate 3 is a flat plate. A support plate 3 is locked on each pressure end plate 2. A displacement sensor 32 is provided between the two support plates 3. The displacement sensor 32 is provided above the liquid level of the immersion water inside the curing box 1. Positioning ropes 31 are provided at both ends of the displacement sensor 32. The displacement sensor 32 is tensioned between the support plates 3 through the positioning ropes 31.
[0055] The positioning rope 31 is a detection rope of the displacement sensor 32 , that is, the displacement sensor 32 and the positioning rope 31 are both integral components of the sensor.
[0056] The isolation tube 4 is a straight tube with openings at both ends. A ventilation window 44 is provided on the side wall of the lower end of the isolation tube 4. The ventilation window 44 connects the inner and outer sides of the isolation tube 4.
[0057] An isolation plug 42 is provided at the bottom of the isolation cylinder 4, and the isolation plug 42 blocks the lower end opening of the isolation cylinder 4 and the opening of the vent window 44;
[0058] A sealing plug 43 is also provided on the top of the isolation tube 4. The sealing plug 43 can be detachably sealed and tightly plugged at the top opening of the isolation tube 4. An internal sensor 41 is provided at the lower end of the sealing plug 43. The internal sensor 41 can be detachably suspended inside the isolation tube 4.
[0059] The isolation plug 42 and the isolation cylinder 4 are clearance-fitted, and the clearance does not exceed 1 mm;
[0060] The sealing plug 43 is a rubber plug, which can be used to seal the top opening of the isolation cylinder 4;
[0061] There is a straight rod at the upper end of the internal sensor 41. The straight rod at the upper end of the internal sensor 41 penetrates and extends above the sealing plug 43. The sealing plug 43 and the straight rod of the internal sensor 41 are interference fit.
[0062] The internal sensor 41 is a temperature and humidity sensor, and the electrical connection line of the internal sensor 41 is arranged above the isolation tube 4;
[0063] The isolation plug 42 is a cylindrical iron block that can provide strong support for the isolation cylinder 4 to prevent the isolation cylinder 4 from being squeezed and deformed during the concrete solidification process. It can also be placed more conveniently and stably on the frame plate 11 to position and place the isolation cylinder 4.
[0064] A straight rod can be provided on the top of the isolation plug 42, and the straight rod extends above the isolation cylinder 4. The top straight rod of the isolation plug 42 is used to pull the isolation plug 42, so as to facilitate the isolation plug 42 and the isolation cylinder 4 to be pulled out of the concrete sample, and it is also convenient to push the isolation plug 42 to separate from the isolation cylinder 4.
[0065] When the present invention is in use, before the concrete sample is formed, the limiting rod 21 and the pressure end plate 2 are placed in the concrete forming mold so that the pressure end plate 2 fits on the two side walls of the concrete mold, and the limiting rod 21 needs to be set horizontally. The position of the limiting rod 21 is adjusted to ensure that the positioning ring 22 is in the center of the concrete. After the concrete is formed and vibrated according to the standard method, the isolation plug 42 is inserted into the bottom of the isolation tube 4 to close the vent window 44 and the bottom opening. Then the entire isolation tube 4 is inserted into the concrete sample, and the isolation tube 4 is inserted into the positioning ring 22 to ensure that the isolation tube 4 is in the center of the concrete sample. After the concrete is initially solidified, the isolation plug 42 at the bottom of the isolation tube 4 is pulled out to open the vent window 44 and the bottom opening of the isolation tube 4.
[0066] Next, place the internal sensor 21 into the isolation tube 4 through the upper opening. The top opening of the isolation tube 4 is then blocked with a rubber plug 43. This plug 43 is designed to ensure a tight seal between the plug 43 and the top opening of the isolation tube 4. The internal sensor 21 and the plug 43 are sealed with a rubber ring to ensure a certain degree of airtightness, preventing excessive air flow. At this point, the temperature and humidity of the concrete setting process can be monitored.
[0067] After the concrete formwork is removed, the bracket of the displacement sensor 32 is connected to the bracket upright plate 3 by fastening screws, and the displacement sensor 32 is installed.
[0068] After completing the above steps, the concrete sample is placed in the curing box 1, and then water is added to the curing box 1 until the water level covers the concrete sample. The data cables of the displacement sensor 32, the environmental sensor 13, and the internal sensor 41 are respectively passed through the curing box 1 through the reserved avoidance holes 14, so that each sensor is connected to the data terminal, and the avoidance holes 14 are sealed with sealing plugs or sealing tape.
[0069] After the concrete is cured to the corresponding age, the water is drained through the drainage hole 12 at the bottom of the curing box 1, and the environmental sensor 13 is placed in the interlayer gap between the curing box 1 and the concrete sample. At this time, the environmental sensor 13 can detect the environment outside the concrete, which is convenient for controlling the temperature and humidity inside the curing box 1. Then the top cover of the curing box is buckled and sealed, and the external temperature and humidity data of the concrete sample during the curing process can be detected. By comparing the changes in the internal and external environments and the data differences, multiple parameters of the concrete sample can be detected and recorded.
[0070] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A synchronous detection device for concrete temperature, humidity and limited expansion rate, characterized in that: include: Curing box (1), pressure end plate (2), bracket vertical plate (3), isolation cylinder (4) and top cover (5); The curing box (1) is a closed box with an open top. A drainage hole (12) and an escape hole (14) are provided on the side wall of the curing box (1). Sealing plugs are provided on the drainage hole (12) and the escape hole (14). A shelf (11) is horizontally provided inside the curing box (1), and the shelf (11) is a mesh plate. The top cover (5) is a closed cover plate, and the top cover (5) can be detachably covered on the top opening of the curing box (1); The pressure end plate (2) is a flat plate, and the pressure end plate (2) is vertically arranged. A limit rod (21) is horizontally locked between the two pressure end plates (2). A positioning ring (22) is also arranged on the limit rod (21). The limit rod (21) and the positioning ring (22) are an integral structure. The positioning ring (22) is a horizontally arranged circular ring, and the inner hole of the positioning ring (22) penetrates the upper and lower sides thereof. The support plate (3) is a flat plate, one support plate (3) is locked on each of the pressure end plates (2), and a displacement sensor (32) is provided between the two support plates (3); The isolation cylinder (4) is a straight cylinder with openings at both ends. A ventilation window (44) is also provided on the side wall of the lower end of the isolation cylinder (4). The ventilation window (44) communicates with the inner and outer sides of the isolation cylinder (4). An isolation plug (42) is provided at the bottom of the isolation cylinder (4), and the isolation plug (42) seals the lower end opening of the isolation cylinder (4) and the opening of the vent window (44); A sealing plug (43) is also provided at the top of the isolation cylinder (4), and the sealing plug (43) is detachably sealed and tightly plugged at the top opening of the isolation cylinder (4). An internal sensor (41) is provided at the lower end of the sealing plug (43), and the internal sensor (41) is detachably suspended inside the isolation cylinder (4).
2. The synchronous detection device for concrete temperature, humidity and limited expansion rate according to claim 1, characterized in that: The isolation cylinder (4) is a PVC round tube, and the diameter of the isolation cylinder (4) is smaller than the inner hole diameter of the positioning ring (22), and the diameter difference does not exceed 1 cm; The positioning ring (22) is sleeved on the outside of the isolation cylinder (4); Both ends of the limiting rod (21) are threaded rods, and both ends of the limiting rod (21) are locked with the pressure end plates (2) on both sides by nuts; The positioning ring (22) is arranged at the midpoint of the limiting pull rod (21).
3. The synchronous detection device for concrete temperature, humidity and limited expansion rate according to claim 1, characterized in that: Positioning ropes (31) are provided at both ends of the displacement sensor (32), and the displacement sensor (32) is tensioned between the bracket uprights (3) via the positioning ropes (31).
4. The synchronous detection device for concrete temperature, humidity and limited expansion rate according to claim 1, characterized in that: The isolation plug (42) and the isolation cylinder (4) are clearance-fitted, and the clearance does not exceed 1 mm; The sealing plug (43) is a rubber plug, and the sealing plug (43) and the upper opening of the isolation cylinder (4) are interference fit; The upper end of the internal sensor (41) is provided with a straight rod, the upper end straight rod of the internal sensor (41) penetrates and extends above the sealing plug (43), and the sealing plug (43) is a rubber plug; The internal sensor (41) is a temperature and humidity sensor, and the electrical connection line of the internal sensor (41) is arranged above the isolation cylinder (4); The isolation plug (42) is a cylindrical iron block.
5. The synchronous detection device for concrete temperature, humidity and limited expansion rate according to claim 1, characterized in that: An environmental sensor (13) is also provided on the top of the inner cavity of the curing box (1), and the environmental sensor (13) is a temperature and humidity sensor.
6. The synchronous detection device for concrete temperature, humidity and limited expansion rate according to claim 1, characterized in that: The drainage hole (12) is provided at the bottom of the side wall of the curing box (1), and the height difference between the drainage hole (12) and the bottom of the curing box (1) is between 1 and 5 cm; There are two avoidance holes (14), both of which are opened on the top of the side wall of the curing box (1). The two avoidance holes (14) are respectively arranged on the left and right sides of the curing box (1), and the height interval between the two avoidance holes (14) and the top of the curing box (1) is between 1-3 cm.