A concrete test block curing device and its usage method

Abstract

This invention discloses a concrete test block curing device and its usage method. The device includes a mounting box, an intermediate cylinder located in the center of the mounting box, multiple rotating disks vertically spaced around the outer periphery of the intermediate cylinder, multiple annular support nets corresponding to each of the rotating disks, a sliding tube reciprocatingly mounted inside the intermediate cylinder, multiple ventilation blocks vertically spaced on the sliding tube, an adjustment box mounted on the mounting box and connected to the intermediate cylinder, and a centrifugal fan connecting the sliding tube to the adjustment box. The adjustment box contains a humidifier and a heater, and the mounting box contains a temperature and humidity sensor. Multiple sets of ventilation ports are vertically spaced on the intermediate cylinder, each corresponding to one of the rotating disks. The reciprocating movement of the sliding tube allows the ventilation blocks to selectively connect to or deviate from one set of ventilation ports. This invention results in more uniform and stable moisture and temperature action on the test block, ensuring effective curing.

Description

Technical Field

[0001] This invention relates to the field of concrete test block curing technology. More specifically, this invention relates to a concrete test block curing device and its method of use. Background Technology

[0002] While pouring concrete, a portion of the mixed concrete needs to be taken to make several sets of test blocks to test the strength of the concrete structure during construction. In engineering construction, there are two types of concrete test blocks: standard-cured test blocks and identical-condition-cured test blocks. Standard-cured test blocks are obtained by curing under standard conditions (temperature 20±3℃, relative humidity above 90%, and curing periods of 3 days, 7 days, and 28 days). Standard-cured test blocks can test the difference between the strength of the on-site mixed concrete and the theoretical value of the mix proportion. Identical-condition-cured test blocks are obtained by curing under conditions identical to the natural hardening conditions of the concrete structure. Identical-condition-cured test blocks can test the difference between the actual strength of the concrete structure and the theoretical value calculated for the structure. By testing the test blocks, the strength changes of the concrete structure can be understood, thereby determining the timing of formwork removal, removal from the concrete bath, lifting, etc., as well as the allowable load of the concrete structure.

[0003] Therefore, preparing concrete test blocks on the construction site is an essential experimental procedure during construction. However, when preparing standard curing test blocks, the finished concrete test blocks may not be delivered to the standard curing room in a laboratory far from the construction site in a timely manner due to various reasons (such as being prepared before the end of the workday). As a result, these prepared test blocks are piled up on the construction site and are not sent to the standard curing room for curing until the next day, which has an adverse effect on the quality of the standard curing test blocks.

[0004] In the prior art, patent publication number CN104924438A discloses a concrete test block curing box, including a box body, a temperature regulating device, and a humidity regulating device. The box body includes a bottom box, a top cover, and a plurality of curing unit boxes. The temperature regulating device and the humidity regulating device are installed in the bottom box. The plurality of curing unit boxes are stacked on top of the bottom box, and the top cover is arranged on top of the top curing unit box. The curing unit box includes a vertical air duct, and the air ducts of adjacent curing unit boxes are interconnected. The temperature regulating device is installed in the temperature regulating chamber of the bottom box, and the air outlet of the temperature regulating chamber is connected to the air duct of the bottom curing unit box. The air inlet of the temperature regulating chamber is arranged at the top of the temperature regulating chamber and is connected to the curing unit box. This invention can increase or decrease the number of curing unit boxes according to the number of test blocks, has good adaptability, and is superior to traditional concrete test block curing boxes in terms of the curing capacity of concrete test blocks and energy saving and emission reduction performance, ensuring that concrete test blocks on the construction site are effectively and properly cured.

[0005] The aforementioned prior art solves the problems described in the background section. However, in these solutions, the air inlets are all located on one side of the test block. During operation, moisture-containing air tends to converge at the air inlet from right to left, leading to uneven temperature and humidity distribution inside the device and affecting the curing effect. Therefore, a concrete test block curing device that solves the above problems is needed. Summary of the Invention

[0006] One objective of this invention is to provide a concrete test block curing device and its usage method, which makes the water vapor and temperature acting on the test block more uniform and stable, thus ensuring the curing effect.

[0007] To address the aforementioned technical problems, this invention provides a concrete test block curing device, comprising an installation box, an intermediate cylinder disposed in the center of the installation box, multiple rotating discs vertically spaced around the outer periphery of the intermediate cylinder, multiple annular support nets corresponding to each of the rotating discs, a sliding tube reciprocatingly disposed within the intermediate cylinder, multiple ventilation blocks vertically spaced on the sliding tube, an adjustment box disposed on the installation box and connected to the intermediate cylinder, and a centrifugal fan connecting the sliding tube to the adjustment box. The adjustment box contains a humidifier and a heater, and the installation box contains a [missing information - likely a type of enclosure or enclosure]. The internal temperature and humidity sensor has a hollow rotating disk that is rotatably fitted around the outer periphery of an intermediate cylinder. Several air inlets and outlets are provided on the upper and lower walls of the rotating disk. Multiple air channels communicating with a sliding tube are provided inside the ventilation block. Multiple sets of vents are vertically spaced on the intermediate cylinder, corresponding to and communicating with multiple rotating disks. Each set of vents is located in the same plane and includes multiple vents corresponding to and communicating with multiple air channels within the ventilation block. The vents are connected to the hollow structure of the rotating disk. The sliding tube moves up and down, allowing the ventilation block to selectively communicate with or deviate from one set of vents.

[0008] Preferably, a bearing ring is fixedly provided on the outer wall of the intermediate cylinder below the vent, the rotating disk is rotatably connected to the bearing ring, the bearing net is fixedly connected to the rotating disk by a support rod, and the area of ​​the bearing net covers at least three-quarters of the area between the intermediate cylinder and the mounting box.

[0009] Preferably, the sliding tube passes vertically through the top of the intermediate cylinder and is slidably connected, with the top end of the sliding tube protruding outside the mounting box.

[0010] Preferably, the top of the sliding tube is connected to the centrifugal fan via a connecting hose, and the regulating box is connected to the centrifugal fan via an air outlet pipe.

[0011] Preferably, the number of ventilation blocks and the number of groups of ventilation openings are equal and both are an even number, and only one of adjacent ventilation blocks corresponds to a group of ventilation openings.

[0012] Preferably, an outlet temperature and humidity sensor is provided inside the intermediate cylinder at the connection port between the regulating box and the intermediate cylinder.

[0013] Preferably, the sliding tube is driven to move back and forth by a reciprocating drive structure. The reciprocating drive structure includes a stop fixedly disposed on the upper part of the sliding tube, a fork slidably contacting the lower surface of the stop, a rotating rod fixedly connected to the fork, a gear plate vertically disposed on the upper part of the mounting box, a power gear meshing with the gear plate, and a power motor that drives the power gear to rotate, which is fixedly disposed on the mounting box. The rotating rod is hinged to the support rod at the top of the mounting box so that the rotating rod drives the fork to rotate in the vertical plane where the stop is located, thereby driving the sliding tube to move up and down reciprocally. A sliding groove is provided on the rotating rod, and a connecting slider is slidably embedded in it. The connecting slider is fixedly disposed at any position eccentric to the gear plate.

[0014] Preferably, the mounting box is rotatably provided with a rotating door on its side, which is used to place or remove test blocks on the support net, and the rotating door is rotatably and sealed to the mounting box.

[0015] Preferably, it also includes a control system, which receives temperature and humidity sensors at the outlet and inside the chamber and controls the opening and closing of the humidifier and heater and power adjustment, while controlling the motor to open and close at set intervals.

[0016] The present invention also provides a method for using a concrete test block curing device, comprising the following steps: First, place the test blocks on the support net in sequence, and set the theoretical temperature and humidity in the control system. The humidifier and heater are started by the control system to work together to increase humidity and heat. At the same time, the control system starts the power motor to start and stop at the set interval. Secondly, the control system receives data from the temperature and humidity sensors at the outlet and inside the chamber. When the temperature and humidity sensor inside the chamber senses that the temperature has reached the set theoretical temperature and humidity threshold, and the temperature and humidity values ​​of the temperature and humidity sensor inside the chamber and the temperature and humidity sensor at the outlet are within the set error range, the control system controls the humidifier and heater to reduce their power. When the temperature and humidity sensor inside the chamber senses that the temperature has not reached the set theoretical temperature and humidity threshold, or the temperature and humidity values ​​of the temperature and humidity sensor inside the chamber and the temperature and humidity sensor at the outlet are not within the set error range, the control system controls the humidifier and heater to increase their power to continue heating or humidifying.

[0017] The present invention has at least the following beneficial effects: 1. This invention uses an ultrasonic humidifier and an electric heater to circulate and humidify the gas inside the chamber. At the same time, by using temperature and humidity sensors at the outlet and inside the chamber, the temperature and humidity inside the chamber can be detected and flexibly adjusted to keep the water vapor and temperature acting on the test block stable, thus ensuring the curing effect of the test block.

[0018] 2. This invention drives the sliding tube to move up and down through a reciprocating drive structure, thereby turning the original air outlet rotating disk into an air inlet rotating disk. While creating vertical convection between the two rotating disks, it can also change the vertical air inlet and outlet directions, thereby making the water vapor and temperature acting on the test block more uniform and ensuring the curing effect.

[0019] 3. The rotating disk of the present invention can rotate, thereby driving the supporting net on it to rotate, so that multiple test blocks can be placed on the entire supporting net, thus the device has a large capacity and is easy to place.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the device of the present invention; Figure 2 This is a cross-sectional view of the vent block portion of the present invention; Figure 3 This is a schematic diagram of the external structure of the device of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Mounting box; 2. Intermediate cylinder; 3. Sliding tube; 4. Ventilation block; 5. Air duct; 6. Vent; 7. Bearing ring; 8. Rotating disc; 9. Air inlet and outlet; 10. Bearing mesh; 11. Temperature and humidity sensor inside the box; 12. Temperature and humidity sensor at the air outlet; 13. Ultrasonic humidifier; 14. Electric heater; 15. Regulating box; 16. Centrifugal fan; 17. Air outlet duct; 18. Connecting hose; 19. Stop block; 20. Fork; 21. Gear disc; 22. Connecting slider; 23. Slide groove; 24. Rotating rod; 25. Power gear; 26. Power motor; 27. Rotating door. Detailed Implementation

[0023] To better understand the purpose, structure, and function of this invention, the invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example

[0025] like Figures 1 to 3 As shown, this invention provides a concrete test block curing device, including a mounting box 1, which is a circular cylindrical structure. A rotating door 27 is installed at the front of the mounting box 1. The concrete test block to be cured is placed inside the mounting box 1 by opening and closing the rotating door 27. When the rotating door 27 is closed, the interior of the mounting box 1 is a sealed space. An intermediate cylinder 2 is installed in the middle of the mounting box 1, which divides the mounting box 1 into inner and outer parts. A sliding tube 3 is embedded in the intermediate cylinder 2 and is slidably connected to the top of the intermediate cylinder 2. Multiple air vents 4 are installed vertically at intervals along the sliding tube 3. Each air vent 4 includes multiple parts that are spaced apart and connected to the circumference of the sliding tube 3. The multiple parts of the air vent 4 are respectively equipped with multiple air channels 5, all of which are connected to the sliding tube 3. Figure 2 As shown, there are four air passages 5. Multiple air vents 6 are opened on the intermediate cylinder 2, forming vertical multi-layered structures. Each layer forms multiple circumferential air vents 6, and the positions of the multiple air vents 6 correspond to the multiple air passages 5 on one of the ventilation blocks 4. For example... Figure 1 As shown, four ventilation blocks 4 correspond to four layers of ventilation openings 6. The four ventilation blocks 4 and the four layers of ventilation openings 6 are staggered. Only one adjacent ventilation block 4 corresponds to one of the layers of ventilation openings 6. For example... Figure 1As shown, the vents 6 of the first and third layers from top to bottom are connected to the first and third ventilation blocks 4, allowing gas to pass through the vents 6 and air passages 5 from the rotating disk 8 into the sliding tube 3, then into the regulating box 15, and finally back into the mounting box 1. A bearing ring 7 is installed on the outside of the intermediate cylinder 2 at the vent 6. A rotating disk 8 is rotatably mounted on the bearing ring 7. The rotating disk 8 has a hollow structure and is connected to the vent 6. Multiple air inlets and outlets 9 are installed on the upper and lower walls of the rotating disk 8, which are connected to the hollow structure inside the rotating disk 8. A bearing net 10 is installed on the upper surface of the rotating disk 8, on which concrete test blocks to be cured are placed. The upper end of the sliding tube 3 is connected to a connecting hose 18, a centrifugal fan 16 is connected to the connecting hose 18, an air outlet pipe 17 is connected to the centrifugal fan 16, and an regulating box 15 is connected to the air outlet pipe 17. An ultrasonic humidifier 13 and an electric heater 14 are installed inside the regulating box 15, and the air outlet of the regulating box 15 is connected to the intermediate cylinder 2.

[0026] The mounting box 1 is equipped with a reciprocating drive structure, which is connected to the sliding tube 3. The reciprocating drive structure includes a gear 21, a stop 19, a shift fork 20, and a rotating rod 24. The gear 21 is vertically rotatably mounted on the upper part of the mounting box 1. A connecting slider 22 is connected to the gear 21, and the connecting slider 22 is embedded in a sliding groove 23. The sliding groove 23 is opened on the rotating rod 24, which is hinged to the bracket of the mounting box 1. A shift fork is mounted on the left end of the rotating rod 24, and a stop 19 is mounted on the sliding tube 3 above the shift fork. The upper surface of the shift fork is in contact with the lower surface of the stop 19. A power gear 25 is engaged on the gear 21, and a power motor 26 is connected to the power gear 25. The power motor 26 is fixedly mounted on the mounting box 1. The power motor 26 drives the power gear 25 to rotate, which in turn drives the gear disc 21 to rotate. This, in turn, causes the connecting slider 22 to move within the slide groove 23 and drives the rotating rod 24 to rotate. This, in turn, causes the shift fork 20 to move up and down, which in turn drives the stop block 19 to move up and down. Finally, this causes the sliding tube 3 to move up and down reciprocally. The up and down reciprocating movement of the sliding tube 3 enables different ventilation blocks 4 to connect with the ventilation openings 6 of different layers, such as... Figure 1 As shown, the air vents 6 of the first and third layers from top to bottom are connected to the first and third air blocks 4; when the sliding tube 3 moves downward, the air vents 6 of the second and fourth layers from top to bottom are connected to the second and fourth air blocks 4, and the original air outlet rotating disk 8 becomes an air inlet rotating disk 8. While forming vertical convection between the two rotating disks 8, the vertical air inlet and outlet directions can be changed, so that the water vapor and temperature acting on the test block are relatively more uniform, ensuring the curing effect.

[0027] It also includes a control system, which receives the temperature and humidity sensor 12 at the outlet and the temperature and humidity sensor 11 inside the chamber and controls the opening and closing of the humidifier and heater and the power adjustment, while controlling the power motor 26 to open and close at set intervals.

[0028] The present invention also provides a method for using a concrete test block curing device, comprising the following steps: 1. When using, first open the rotating door 27 and place the test block on the support net 10. Since both the support net 10 and the rotating disk 8 are circular and the rotating disk 8 can rotate, after placing the test block on the support net 10 at the frontmost position, drive the rotating disk 8 to rotate, and place the support net 10 at the next position. Thus, multiple test blocks can be placed on the entire support net 10, so that the device has a large capacity and is easy to place.

[0029] 2. Then close the rotating door 27, set the theoretical temperature and humidity in the control system, and according to the required temperature and humidity, such as 95% humidity and 20 degrees Celsius, start the ultrasonic humidifier 13 and electric heater 14 to work together to humidify and heat the system. When the temperature and humidity sensor 11 inside the chamber senses that the temperature has reached the set threshold, stop heating or humidifying. The centrifugal fan 16 works to draw air out of the sliding tube 3 through the connecting hose 18, and then discharges it into the regulating box 15 through the air outlet 17. After being heated and humidified, it is discharged into the intermediate cylinder 2. Since part of the ventilation block 4 is intersected with the vent 6, the air directly enters the vent 6 through the intermediate cylinder 2 and enters the rotating plate 8, and is discharged through the air inlet and outlet 9, thus providing warm and humid gas to the installation box 1. Since there are many air inlets and outlets 9 and they are evenly distributed, the temperature and humidity in the installation box 1 are relatively uniform, which is beneficial for the curing of the test block under standard conditions.

[0030] 3. The control system starts the power motor 26 at set intervals. Every certain period of operation, the power motor 26 drives the power gear 25 to rotate, which in turn drives the gear disc 21. The gear disc 21 then moves the connecting slider 22, which in turn acts on the slide groove 23, causing the rotating rod 24 to rotate. The rotating rod 24 then moves the shift fork, which in turn moves the sliding tube 3 upwards or downwards. The gear disc 21 rotates 180 degrees. The movement of the sliding tube 3 causes the ventilation block 4 to align its air passage 5 with another vent 6, thus changing the original outlet rotating disc 8 into an inlet rotating disc 8. This creates vertical convection between the two rotating discs 8 and changes the direction of airflow, resulting in more uniform moisture and temperature distribution on the test block, ensuring better curing results. The sliding tube 3 can be configured to fall freely due to gravity or to move vertically by sliding connection between the stop block 19 and the shift fork 20.

[0031] 4. The outlet temperature and humidity sensor 12 is used to detect the temperature and humidity of the gas discharged from the regulating box 15. When the temperature and humidity values ​​of the internal temperature and humidity sensor 11 and the outlet temperature and humidity sensor 12 are small and the temperature and humidity value of the internal temperature and humidity sensor 11 is close to the set value, the power of the ultrasonic humidifier 13 and the electric heater 14 is reduced, thereby making the regulation more stable. The control system receives data from the outlet temperature and humidity sensor 12 and the internal temperature and humidity sensor 11. When the internal temperature and humidity sensor 11 senses that the temperature has reached the set theoretical temperature and humidity threshold, and the temperature and humidity values ​​of the internal temperature and humidity sensor 11 and the outlet temperature and humidity sensor 12 are within the set error range, the control system controls the humidifier and heater to reduce their power. When the internal temperature and humidity sensor 11 senses that the temperature has not reached the set theoretical temperature and humidity threshold, or the temperature and humidity values ​​of the internal temperature and humidity sensor 11 and the outlet temperature and humidity sensor 12 are not within the set error range, the control system controls the humidifier and heater to increase their power to continue heating or humidifying.

[0032] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention, and other modifications can be easily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A concrete test block curing device, characterized in that, The system includes a mounting box, a central cylinder located in the middle of the mounting box, multiple rotating discs vertically spaced around the outer periphery of the central cylinder, multiple annular support nets corresponding to each of the rotating discs, a sliding tube reciprocating within the central cylinder, multiple ventilation blocks vertically spaced on the sliding tube, a regulating box mounted on the mounting box and connected to the central cylinder, and a centrifugal fan connecting the sliding tube to the regulating box. The regulating box contains a humidifier and a heater. The mounting box contains an internal temperature and humidity sensor. The rotating discs are... The rotating disk has a hollow structure and is rotatably fitted around the outer periphery of the intermediate cylinder. Several air inlets and outlets are provided on the upper and lower walls of the rotating disk. The ventilation block has multiple air channels that communicate with the sliding tube. Multiple sets of vents are vertically spaced on the intermediate cylinder, which correspond to and communicate with multiple rotating disks. Each set of vents is located in the same plane and includes multiple vents that communicate with multiple air channels in the ventilation block. The vents are connected to the hollow structure of the rotating disk. The sliding tube moves up and down, allowing the ventilation block to selectively communicate with or be offset from one set of vents.

2. The concrete test block curing device as described in claim 1, characterized in that, A bearing ring is fixedly installed on the outer wall of the intermediate cylinder below the vent. The rotating disk is rotatably connected to the bearing ring. The bearing net is fixedly connected to the rotating disk by a support rod. The area of ​​the bearing net covers at least three-quarters of the area between the intermediate cylinder and the mounting box.

3. The concrete test block curing device as described in claim 1, characterized in that, The sliding tube passes vertically through the top of the intermediate cylinder and is slidably connected, with the top end of the sliding tube protruding outside the mounting box.

4. The concrete test block curing device as described in claim 3, characterized in that, The top of the sliding tube is connected to the centrifugal fan via a connecting hose, and the regulating box is connected to the centrifugal fan via an air outlet pipe.

5. The concrete test block curing device as described in claim 1, characterized in that, The number of ventilation blocks and the number of ventilation openings are equal and both are even numbers. Only one of the adjacent ventilation blocks corresponds to one group of ventilation openings.

6. The concrete test block curing device as described in claim 1, characterized in that, An outlet temperature and humidity sensor is installed at the connection between the regulating box and the intermediate cylinder inside the intermediate cylinder.

7. The concrete test block curing device as described in claim 6, characterized in that, The sliding tube is driven to move back and forth by a reciprocating drive structure. The reciprocating drive structure includes a stop fixedly set on the upper part of the sliding tube, a fork slidably contacting the lower surface of the stop, a rotating rod fixedly connected to the fork, a gear plate vertically set on the upper part of the mounting box, a power gear meshing with the gear plate, and a power motor that drives the power gear to rotate. The motor is fixedly set on the mounting box. The rotating rod is hinged to the support rod at the top of the mounting box so that the rotating rod drives the fork to rotate in the vertical plane where the stop is located, thereby driving the sliding tube to move up and down reciprocally. A sliding groove is opened on the rotating rod, and a connecting slider is slidably embedded in it. The connecting slider is fixedly set at any position eccentric to the gear plate.

8. The concrete test block curing device as described in claim 1, characterized in that, The mounting box is rotatably equipped with a rotating door on its side, which is used to place or remove test blocks on the support net. The rotating door is rotatably and sealed to the mounting box.

9. The concrete test block curing device as described in claim 7, characterized in that, It also includes a control system, which receives data from the temperature and humidity sensors at the outlet and inside the chamber and controls the humidifier and heater to turn on and off and adjust their power, while controlling the motor to turn on and off at set intervals.

10. A method of using the concrete test block curing device as described in claim 9, characterized in that, Includes the following steps: First, place the test blocks on the support net in sequence, and set the theoretical temperature and humidity in the control system. The humidifier and heater are started by the control system to work together to increase humidity and heat. At the same time, the control system starts the power motor to start and stop at the set interval. Secondly, the control system receives data from the temperature and humidity sensors at the outlet and inside the chamber. When the temperature and humidity sensor inside the chamber senses that the temperature and humidity have reached the set theoretical temperature and humidity thresholds, and the difference between the temperature and humidity values ​​of the temperature and humidity sensor inside the chamber and the temperature and humidity sensor at the outlet is within the set error range, the control system controls the humidifier and heater to reduce their power. When the temperature and humidity sensor inside the chamber senses that the temperature and humidity have not reached the set theoretical temperature and humidity thresholds, or the difference between the temperature and humidity values ​​of the temperature and humidity sensor inside the chamber and the temperature and humidity sensor at the outlet is not within the set error range, the control system controls the humidifier and heater to increase their power to continue heating or humidifying.

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