Concrete sample curing box

Abstract

The utility model discloses a concrete sample curing box, and belongs to the technical field of concrete curing equipment. Comprising a curing box body, a curing chamber is arranged on the curing box body, a plurality of layers of shelves are arranged in the curing chamber, and the curing box further comprises a motor, a transmission shaft and an adjusting frame. The shaft body, located in the curing chamber, of the transmission shaft is of a prismatic structure, the shelf is slidably connected with the transmission shaft, and a ridge hole corresponding to the transmission shaft in structure is formed in the connecting position of the shelf and the transmission shaft. An adjusting frame is arranged on the lower side of each layer of shelf and used for adjusting the height of the shelf and supporting the shelf, the left end and the right end of each adjusting frame are slidably connected with the left side wall and the right side wall of the curing chamber respectively, each adjusting frame comprises a fixing rod capable of stretching and retracting front and back, and adjusting holes used for containing the fixing rods are formed in the rear side wall of the curing chamber. The number of the adjusting holes is larger than that of the fixing rods. According to the utility model, test pieces with different sizes and specifications can be conveniently placed, and the test pieces can be uniformly heated.

Description

Technical Field

[0001] The utility model relates to a curing box, in particular to a concrete specimen curing box, and belongs to the technical field of concrete curing equipment. Background Art

[0002] Concrete is one of the common building materials. Since concrete is an artificial material made of cementitious materials, granular aggregates, water and admixtures in a certain proportion, and is evenly mixed, compacted and hardened, it is necessary to inspect and control the quality of each finished material. During the construction of large-scale construction projects, it is necessary to sample and test concrete. The general process is: first, sample the concrete and make a test block. After the test block solidifies, the test block is cured, then demolded and tested using a test instrument. During the curing process, a standard constant temperature and humidity curing box is often used to ensure that the quality of the concrete test block is not affected during the curing process.

[0003] The standard constant temperature and humidity curing box recorded in the relevant technology includes a curing box body and a concrete placement rack. A humidifying device and a humidity sensor are provided inside the curing box to ensure a constant humidity state inside the curing box. A heating tube and a temperature sensor are also provided inside the curing box to ensure a constant temperature state inside the curing box. However, the existing curing box installs the heating tube on the back plate opposite to the box door, so that the temperature of the curing box near the heating tube side is higher than the temperature of the curing box near the box door side. When the curing box performs long-term curing operations on multiple concrete test blocks at the same time, the concrete test blocks will be heated unevenly, which will affect the surface hardness and internal structure of the concrete test blocks, which will affect the final test results.

[0004] In addition, the curing box is used for standard constant temperature and humidity curing of concrete specimens and cement specimens. Since the shelves used to place concrete specimens in the standard constant temperature and humidity curing box have the same spacing, it is not conducive to storing concrete specimens of different sizes, which limits its use. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a concrete specimen curing box.

[0006] The technical solution adopted by the utility model is to design a concrete specimen curing box, comprising a curing box body, a curing room is arranged on the curing box body, and multi-layer shelves are arranged in the curing room, and the utility model is characterized in that it also includes a motor, a transmission shaft and an adjustment frame.

[0007] The motor is arranged at the upper end of the curing box body, the output end of the motor is connected to the transmission shaft, the shaft body of the transmission shaft located in the curing room is arranged as a prismatic structure, the shelf is slidably connected to the transmission shaft, and the connection between the shelf and the transmission shaft adopts a prism hole corresponding to the transmission shaft structure.

[0008] An adjustment frame is provided on the lower side of each layer of the shelf for adjusting the height of the shelf and supporting the shelf. The left and right ends of the adjustment frame are respectively slidably connected to the left and right side walls of the curing room. The adjustment frame includes a fixed rod that can be telescoped forward and backward. Adjustment holes for receiving the fixed rod are provided on the rear side wall of the curing room. The number of the adjustment holes is greater than the number of the fixed rods.

[0009] Furthermore, the shelf is a hollow disc-shaped structure.

[0010] Furthermore, sliders are respectively provided at the left and right ends of the adjustment frame, and slideways are respectively provided at the left and right side walls of the curing room, and the sliders are slidably connected to the slideways.

[0011] Furthermore, the adjustment frame also includes a support rod, and sliders are respectively arranged at the left and right ends of the support rod; the two support rods are arranged opposite to each other, and a fixing rod is respectively arranged at the left and right ends of the two oppositely arranged support rods, and the fixing rod passes through the two support rods and is slidably connected to the support rods.

[0012] Furthermore, a handle and a plug are respectively provided at the front and rear ends of the fixing rod, and the outer diameters of the handle and the plug are larger than the diameter of the through hole at the connection between the support rod and the fixing rod.

[0013] Furthermore, a threaded barrel is provided at the connection between the support rod and the fixing rod on the front side of the adjustment frame, and an external thread which is threadably connected to the threaded barrel is provided outside the front end of the fixing rod.

[0014] Furthermore, the front end of the adjustment hole and the insertion end of the plug are chamfered respectively.

[0015] Furthermore, the adjustment frame further includes a support plate and a reinforcement rod, wherein the support plate and the reinforcement rod are arranged between two support rods of the adjustment frame, the reinforcement rods are respectively arranged on the left and right sides of the support plate, and the transmission shaft passes through the support plate.

[0016] Furthermore, a thrust ball bearing for supporting the shelf is provided at the connection between the transmission shaft and the support plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model drives the shelf to rotate through a motor, so that the test piece on the shelf can rotate and be heated, so that the concrete test block is heated more evenly, reducing the impact of uneven heating on the surface hardness and internal structure of the concrete test block, and the final test result is more accurate and reliable. In addition, the utility model combines the adjustment frame and the shelf that can slide up and down along the transmission shaft, so that the spacing between adjacent shelves can be flexibly adjusted, which is more conducive to the storage of concrete samples of different sizes and has less restrictions on use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the axonometric drawing of the utility model.

[0021] Figure 2 It is a schematic diagram of the front view of the utility model.

[0022] Figure 3 The utility model is a schematic diagram of an adjustment frame equipped with a thrust ball bearing.

[0023] Figure 4 This is a schematic diagram of a shelf of the utility model.

[0024] In the figure: 1. Curing box body; 2. Curing room; 3. Shelf; 4. Motor; 5. Drive shaft; 6. Adjustment frame; 7. Fixing rod; 8. Adjustment hole; 9. Slider; 10. Slide; 11. Support rod; 12. Handle; 13. Plug; 14. Threaded tube; 15. Support plate; 16. Reinforcement rod; 17. Thrust ball bearing; 18. Heating tube. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example 1

[0028] like Figure 1-Figure 4 As shown: This embodiment discloses a concrete specimen curing box, which includes a curing box body 1, on which a curing room 2 is provided, and inside which a six-layer shelf 3 is provided. The curing box body 1 includes a box structure, which consists of an inner layer, a middle layer and an outer layer. The inner liner is welded with imported mirror stainless steel, the outer shell is made of cold-rolled steel plate, which is bent and formed, and the middle partition is filled with thermal insulation cotton; the curing box body 1 should also include a humidifying device (ultrasonic humidifier) ​​and a humidity sensor to ensure a constant humidity state inside the curing box, and the curing box should also include a heating pipe 18 and a temperature sensor (which can also be equipped with a refrigeration device or system) to ensure a constant temperature state inside the curing box; the heating pipe 18 is installed on the back panel opposite to the box door. The curing box body 1 should also include a control system and an operation panel, etc.

[0029] The above-mentioned standard constant temperature and humidity curing box is easy to operate, and has electric heating and cooling devices. It can be controlled at 20±1℃ for concrete specimen curing under any room temperature conditions. It provides indispensable equipment for large, medium and small cement plants, construction and construction departments for concrete specimen and cement specimen coagulation curing.

[0030] Its working principle can be roughly divided into:

[0031] Temperature control: When the temperature inside the box is lower than the lower limit given value of the control system (temperature controller), the control system outputs a heating signal to instruct the electric heating element to start working. Conversely, when the temperature is higher than the upper limit given value, the control system instructs the refrigeration system to work. When the temperature inside the box reaches the required requirement, heating or cooling will automatically stop.

[0032] Humidity control: Use ultrasonic humidifier to increase humidity, which can ensure that the humidity in the box reaches ≥95%. The humidification device is automatically controlled by the control system. When the humidity is <95%, the control system instructs the humidifier to work, and it automatically stops working after reaching the hysteresis value. The hysteresis value should be adjusted to 0-1℃ and not too large.

[0033] The above are all prior arts and are not the innovation of this application, so they will not be described in detail here.

[0034] The concrete specimen curing box disclosed in this embodiment also includes a motor 4, a transmission shaft 5 and an adjustment frame 6; the motor 4 is fixedly arranged at the upper end of the curing box body 1, and the output end of the motor 4 is connected to the transmission shaft 5, and the transmission shaft 5 is rotatably arranged in the curing chamber 2, and the shaft body of the transmission shaft 5 located in the curing chamber 2 is arranged as a prismatic structure, specifically a hexagonal prism structure, and the shelf 3 is slidably connected to the transmission shaft 5, and the connection between the shelf 3 and the transmission shaft 5 adopts a prism hole corresponding to the structure of the transmission shaft 5, that is, a hexagonal prism hole; when working, the motor 4 drives the transmission shaft 5 to rotate slowly, and then the transmission shaft 5 drives the shelf 3 to rotate slowly, so that the cement specimen on the shelf 3 rotates in the curing chamber 2 to improve its heating uniformity.

[0035] In this embodiment, an adjustment frame 6 is provided on the lower side of each layer of the shelf 3 to adjust the height of the shelf 3 and support the shelf 3. The left and right ends of the adjustment frame 6 are respectively connected to the left and right side walls of the curing room 2 in a sliding manner. The adjustment frame 6 includes a fixed rod 7 that can be telescopically moved forward and backward. The rear side wall of the curing room 2 is provided with an adjustment hole 8 for receiving the fixed rod 7. The number of the adjustment holes 8 is greater than the number of the fixed rods 7, so as to achieve multi-gear adjustment of the height of the adjustment frame 6. When it is necessary to adjust the height of the shelf 3 so as to obtain the required spacing between two adjacent layers of the shelf 3, the fixed rod 7 on the adjustment frame 6 on the lower side of the shelf 3 is separated from the adjustment hole 8, and the adjustment frame 6 is lifted or lowered, and the shelf 3 on the adjustment frame 6 is lifted or lowered accordingly. When the required height is reached, the fixed rod 7 on the adjustment frame 6 is pushed backward into the adjustment hole 8 to fix the adjustment frame 6. At this time, the shelf 3 on the adjustment frame 6 is relatively fixed and no longer slides up and down along the transmission shaft 5.

[0036] Example 2

[0037] like Figure 4 As shown: This embodiment is a further optimized design of the shelf 3 based on the embodiment 1, specifically: the shelf 3 is a hollow disc-shaped structure, including multiple layers of circular rings of different sizes, the multiple layers of circular rings are coaxially arranged, and adjacent circular rings are connected by rectangular tubes, so as to facilitate the rotation with the transmission shaft 5 and the placement of the test piece.

[0038] Example 3

[0039] like Figure 3 As shown: This embodiment is a further refinement of the structure of the adjustment frame 6 based on the embodiment 2, specifically:

[0040] The left and right ends of the adjustment frame 6 are respectively provided with sliders 9, and the left and right side walls of the curing chamber 2 are respectively provided with slideways 10, and the sliders 9 are slidably connected with the slideways 10. Two sliders 9 are arranged side by side at each end of the adjustment frame 6, and correspondingly, two sets of slideways 10 are arranged side by side on each side wall on the left and right sides of the curing chamber 2.

[0041] In this embodiment, the adjustment frame 6 further includes a support rod 11, and the support rod 11 is used to support the shelf 3. Slide blocks 9 are respectively arranged at the left and right ends of the support rod 11. In one adjustment frame 6, two support rods 11 are arranged opposite to each other, and a fixing rod 7 is respectively arranged at the left and right ends of the two oppositely arranged support rods 11. The support rods 11 and the fixing rod 7 form a well-shaped structure. The fixing rod 7 penetrates the two support rods 11 and is slidably connected with the support rods 11, so that the fixing rod 7 can be pulled out forward or pushed into the adjustment hole 8 backward.

[0042] Example 4

[0043] This embodiment further refines the structure of the fixing rod 7 on the basis of the embodiment 3, specifically:

[0044] A handle 12 and a plug 13 are respectively provided at the front and rear ends of the fixing rod 7. The outer diameters of the handle 12 and the plug 13 are larger than the diameter of the through hole at the connection between the support rod 11 and the fixing rod 7. The forward or backward stroke of the fixing rod 7 can be limited to prevent the fixing rod 7 from being separated from the support rod 11. The handle 12 is more convenient for the operator to use.

[0045] Example 5

[0046] This embodiment further refines the structure of the adjustment frame 6 on the basis of the embodiment 4, specifically:

[0047] A threaded barrel 14 is provided at the connection between the support rod 11 and the fixing rod 7 on the front side of the adjustment frame 6, and an external thread that is threadedly connected to the threaded barrel 14 is provided on the front end of the fixing rod 7. When fixing the adjustment frame 6, the plug 13 of the fixing rod 7 is inserted into the adjustment hole 8, and then the fixing rod 7 is rotated so that the front end of the fixing rod 7 is threadedly connected to the threaded barrel 14 on the support rod 11, thereby preventing the adjustment frame 6 from loosening during use after being fixed.

[0048] In this embodiment, the front end of the adjustment hole 8 and the insertion end of the plug 13 are chamfered respectively, that is, the insertion end of the plug 13 forms a conical structure, and the front end of the adjustment hole 8 forms a trumpet-shaped opening structure, which is convenient for aligning and inserting the fixing rod 7 with the adjustment hole 8.

[0049] Example 6

[0050] This embodiment further refines the structure of the adjustment frame 6 on the basis of the embodiment 5, specifically:

[0051] The adjustment frame 6 also includes a support plate 15 and a reinforcement rod 16, which are arranged between the two support rods 11 of the adjustment frame 6. The reinforcement rods 16 are respectively arranged on the left and right sides of the support plate 15 to strengthen the structural strength of the adjustment frame 6 or the support plate 15. The transmission shaft 5 passes through the support plate 15, and the transmission shaft 5 can rotate freely relative to the support plate 15.

[0052] In this embodiment, a thrust ball bearing 17 for supporting the shelf 3 is provided at the connection between the transmission shaft 5 and the support plate 15 to reduce wear and resistance during the rotation of the shelf 3 .

[0053] In addition, the inventor believes that part of the water vapor in the box will condense on the top wall of the box to produce water droplets. After a certain period of time, the water droplets will drip into the specimen. The water droplets entering the specimen will affect the water-cement ratio of the specimen, and thus affect the quality of the specimen. In view of this, the top of the curing room 2 is deliberately set into a herringbone structure (not shown in the accompanying drawings) in the present application, so that the water droplets produced on the top wall are guided to the left and right side walls of the curing room 2 and flow down to the water tank below, thereby improving the detection accuracy and reliability of the specimen.

[0054] In addition, in the description of the present utility model, unless otherwise specified, if the terms "multiple", "multiple roots", "multiple groups" are used, they mean two or more than two, and "several", "several roots", "several groups" mean one or more than one. In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", "third" are used, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A concrete specimen curing box, comprising a curing box body, a curing room provided on the curing box body, and a multi-layer shelf provided in the curing room, characterized in that: It also includes a motor, a transmission shaft and an adjustment frame; The motor is arranged at the upper end of the curing box body, the output end of the motor is connected to the transmission shaft, the shaft body of the transmission shaft located in the curing room is arranged as a prismatic structure, the shelf is slidably connected to the transmission shaft, and the connection between the shelf and the transmission shaft adopts a prism hole corresponding to the transmission shaft structure; An adjustment frame is provided on the lower side of each layer of the shelf for adjusting the height of the shelf and supporting the shelf. The left and right ends of the adjustment frame are respectively slidably connected to the left and right side walls of the curing room. The adjustment frame includes a fixed rod that can be telescoped forward and backward. Adjustment holes for receiving the fixed rod are provided on the rear side wall of the curing room. The number of the adjustment holes is greater than the number of the fixed rods.

2. The concrete specimen curing box according to claim 1, characterized in that: The shelf is a hollow disc-shaped structure.

3. The concrete specimen curing box according to claim 2, characterized in that: Slide blocks are respectively arranged at the left and right ends of the adjustment frame, and slideways are respectively arranged at the left and right side walls of the curing room, and the slide blocks are slidably connected with the slideways.

4. The concrete specimen curing box according to claim 3, characterized in that: The adjustment frame also includes a support rod, and sliders are respectively arranged at the left and right ends of the support rod; the two support rods are arranged opposite to each other, and a fixing rod is respectively arranged at the left and right ends of the two oppositely arranged support rods, and the fixing rod passes through the two support rods and is slidably connected to the support rods.

5. The concrete specimen curing box according to claim 4, characterized in that: The front and rear ends of the fixing rod are respectively provided with a handle and a plug, and the outer diameters of the handle and the plug are larger than the aperture of the through hole at the connection between the support rod and the fixing rod.

6. The concrete specimen curing box according to claim 5, characterized in that: A threaded barrel is arranged at the connection between the support rod and the fixing rod at the front side of the adjusting frame, and an external thread which is threadably connected with the threaded barrel is arranged outside the front end of the fixing rod.

7. The concrete specimen curing box according to claim 6, characterized in that: The front end of the adjustment hole and the insertion end of the plug are chamfered respectively.

8. The concrete specimen curing box according to claim 7, characterized in that: The adjustment frame further comprises a support plate and a reinforcement rod, wherein the support plate and the reinforcement rod are arranged between two support rods of the adjustment frame, the reinforcement rods are arranged on the left and right sides of the support plate respectively, and the transmission shaft passes through the support plate.

9. The concrete specimen curing box according to claim 8, characterized in that: A thrust ball bearing for supporting the shelf is arranged at the connection between the transmission shaft and the support plate.

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