Device for spraying concrete sampling large plate

Abstract

The utility model discloses a device for spraying a concrete sampling large plate, which comprises a vertical rectangular rear template, two vertical side templates and a top template, the two vertical side templates are respectively and vertically arranged on the left side and the right side of the rear template, the top template is arranged at the top of the rear template, and the rear template, the side templates and the top template form a dustpan shape with a downward opening. And the side mold plates and the top mold plate are rotationally connected with the rear mold plate. In the demolding process, demolding operation can be completed only by opening the top mold plate and the two side mold plates in sequence and then prizing up the rear mold plate, and a sample is very convenient to take out, so that the demolding operation is more time-saving and labor-saving, and it can be ensured that the sample is intact and free of defects.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete sample preparation devices, and in particular to a device for taking samples of large slabs of shotcrete. Background Technology

[0002] Shotcrete is a construction method that uses air pressure to spray fine aggregate concrete using a robotic arm. It is commonly used for constructing tunnel linings, walls, ceilings, and other thin-walled structures, as well as protective layers for steel structures. Shotcrete is made by loading pre-mixed cement, sand, gravel, water, and a certain amount of admixtures into a shotcrete machine, using high-pressure air to deliver the mixture to a nozzle, where it is mixed with a quick-setting agent and sprayed at high speed onto the surface of rock or concrete.

[0003] Before formal construction, sampling is required to test the performance of the samples. This usually involves spraying concrete into a mold to form a slab-shaped sample, which is then processed and subjected to performance tests. Only after passing the tests can the next step of construction proceed.

[0004] The current mold is a rectangular box shape. The mold is erected with the opening facing forward, and the operator uses a spray gun to spray concrete slurry into the box. After solidification, a sample is formed. The mold is then laid down, the sample is removed, and the surface concrete is then cut as necessary to process it into the required specimen.

[0005] Because the mold is box-shaped and the sample is located inside the mold, it is difficult to remove the sample. It requires forcefully striking the mold, which is not only time-consuming and laborious, but also easily causes mold deformation and sample damage.

[0006] In addition, due to the weight of the spray gun, the lower edge of the mold is obstructed when the operator sprays concrete, making it difficult to spray the bottom edge of the mold in place, resulting in insufficient material or incomplete compaction at the lower edge of the sample. Patent CN211784659U discloses a portable shotcrete sampling slab mold, including a small base plate, a large base plate, long side plates, short side plates, long rectangular timbers, short rectangular timbers, threaded tie rods, and U-shaped clips. The small and large base plates are rectangular, with the small base plate fixed to the center of the large base plate. Two long side plates and two short side plates form a rectangle along the sides of the small base plate. Short rectangular timbers are fixed to the outside of the short side plates, and long rectangular timbers are fixed to the outside of the long side plates. The long rectangular timbers have ends that extend beyond the contact points of the long and short rectangular timbers, with notches on the ends. The threaded tie rods are located on the corresponding notches at the ends of the two long side plates, and U-shaped clips and nuts are provided at both ends of the threaded tie rods. It achieves detachability and portability by using threaded tie rods, but once disassembled, the parts are scattered and easily lost, and demolding is time-consuming and laborious. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a device for sampling large slabs of shotcrete, so as to solve the problem that the sample is not easy to take out when shooting concrete.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A device for sampling large slabs of shotcrete includes a vertically rectangular rear template, two vertically arranged side templates on the left and right sides of the rear template, and a top template on top of the rear template. The rear template, side templates, and top template form a scoop shape with the opening facing downwards. The side templates and top template are rotatably connected to the rear template.

[0010] Furthermore, locking rings are fixedly connected to the top of both side templates. The top template has through holes at positions corresponding to the locking rings. The locking rings are inserted through the corresponding through holes, and a rod is inserted into the locking rings. The rod is located on the top surface of the top template.

[0011] Furthermore, the top template, side template and rear template are all provided with a release layer inside.

[0012] Furthermore, the release layer is a single-sided adhesive buffer template cloth, one side of which is smooth and the other side is rough. The smooth side of the single-sided adhesive buffer template cloth is attached to the inside of the top template, side template and bottom template.

[0013] Furthermore, the rear template has a notch at the edge near the side template, and a rotating plate is provided in the notch, which is fixedly connected to the side template.

[0014] Furthermore, a short pipe is fixedly connected to the outer side of the side template, and the axis of the short pipe is in the horizontal direction.

[0015] Furthermore, the side template and the rear template, as well as the top template and the rear template, are connected by hinges.

[0016] The positive effects of this utility model are:

[0017] 1. This utility model is provided with a rear template, a top template and two side templates. The top template and the side templates are rotatably connected to the rear template. Therefore, when demolding, it is only necessary to pry open the top template and the two side templates in sequence, and then pry open the rear template to complete the demolding operation. The sample can be easily removed, thus making the demolding operation more time-saving and labor-saving.

[0018] 2. The rear template has a notch, and a rotating plate is fixedly connected to the side template. A short tube is fixedly connected to the outside of the side template. A pry bar is inserted into the short tube. When the side template is separated from the sample, the sample can also be separated from the rear template, thus further facilitating the demolding operation.

[0019] 3. This utility model uses a single-sided adhesive buffer template cloth as the release layer. One side of the single-sided adhesive buffer template cloth is smooth, and the other side is rough. The smooth side of the single-sided adhesive buffer template cloth can be easily separated from the top, side, and bottom templates, making demolding easier. Applying the single-sided adhesive buffer template cloth is also convenient; since no release agent is applied, there is no need to wait for the release agent to dry, thus shortening the preparation time. At the same time, the single-sided adhesive buffer template cloth, with its certain thickness, can buffer the impact of shotcrete on the template, reduce concrete rebound, and ensure the accuracy of sampling. Attached Figure Description

[0020] Figure 1 This is the front view of this utility model;

[0021] Figure 2 yes Figure 1 The right view;

[0022] Figure 3 yes Figure 1 A cross-sectional view of the AA section;

[0023] Figure 4 This is a schematic diagram of the sample being demolded;

[0024] In the picture:

[0025] 1. Insert rod; 2. Locking ring; 3. Rotating plate; 4. Top template; 5. Side template; 6. Rear template; 7. Hinge; 8. Notch; 9. Short tube; 10. Demolding layer; 11. Sample. Detailed Implementation

[0026] Example 1

[0027] like Figures 1 to 3 As shown, a device for sampling large slabs of shotcrete includes a vertically rectangular rear template 6, two vertically arranged side templates 5 on the left and right sides of the rear template 6, and a top template 4 on top of the rear template 6. Both the side templates 5 and the top template 4 are rectangular, with both ends of the top template 4 extending beyond the side templates 5. When the rear template 6, side templates 5, and top template 4 are closed, they form a scoop shape with the opening facing downwards. The rear sides of the two side templates 5 are rotatably connected to the left and right sides of the rear template 6 via hinges 7, and the rear side of the top template 4 is also rotatably connected to the upper side of the rear template 6 via hinges 7.

[0028] Both side templates 5 have inverted U-shaped locking rings 2 welded to their tops. The top template 4 has through holes corresponding to the locking rings 2, and the locking rings 2 are respectively inserted into the corresponding through holes. A rod 1 is inserted into each locking ring 2, and the locking ring 2 is located at the front of the top surface of the side template 5. The rod 1 is L-shaped and is inserted sequentially into the two locking rings 2, located on the top surface of the top template 4, thereby locking the positions of the top template 4 and the two side templates 5, making the top template 4 and the two side templates 5 perpendicular to the rear template 6.

[0029] The working process of this utility model is as follows:

[0030] 1. Apply release coating to the inside of the top template 4, side template 5 and rear template 6 to form a release layer 10.

[0031] 2. Place the present invention on the mold platform and spray concrete into the cavity formed by the top mold 4, the rear mold 6 and the two side molds 5. After the concrete solidifies, a sample 11 is formed.

[0032] 3. Lay the present invention down so that the rear template 6 is in a horizontal position. Pull out the insert rod 1, pry open the top template 4 and the two side templates 5 respectively, and the side of the sample 11 will be exposed. Then tap the edge of the rear template 6 and use a pry bar to pry off the rear template 6.

[0033] 4. Cut the sample 11 to form a square of 100×100×100mm or a long strip of 100×100×400mm.

[0034] Since the top template 4, side template 5 and rear template 6 can all be pried open outwards, the separation of this utility model from the sample 11 is more convenient, time-saving and labor-saving.

[0035] In addition, since the bottom of this utility model is unobstructed, there is no obstruction at the bottom when spraying concrete. Therefore, when spraying concrete, it is easy to fill the cavity formed by the top formwork 4, the rear formwork 6 and the two side formworks 5 with concrete, and the bottom edge of the sample 11 will not have a lack of material.

[0036] Example 2

[0037] Combination Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that:

[0038] The rear template 6 has eight rectangular notches 8 near the edge of the side template, each notch 8 containing a rectangular rotating plate 3, which is fixedly connected to the side template 5. In actual production, the side template 5 and the rotating plate 3 can be made by cutting and bending the same steel plate.

[0039] Two short pipes 9 are welded to the outside of each side template 5, and the axes of the short pipes 9 are both horizontal.

[0040] During demolding, after laying the present invention down, pull out the insert rod 1, open the top template 4 outward, and then insert a pry bar into the short tube 9. At the same time as the side template 5 separates from the sample block 11, the rotating plate 3 rotates together with the side template 5. The edge of the sample block 11 is lifted by the rotating plate 3, so that a gap is formed between the sample block 11 and the rear template 6, and the sample block 11 can be easily removed.

[0041] Example 3

[0042] The difference between this embodiment and Embodiment 2 is that:

[0043] The release layer 10 is a single-sided adhesive buffer template fabric, with one side being smooth and the other side being rough. The smooth side of the single-sided adhesive buffer template fabric is attached to the inside of the top template 4, side template 5, and bottom template 6.

[0044] The smooth surface of the single-sided adhesive cushioning template fabric can be easily separated from the top template 4, side templates 5, and rear template 6, making demolding easier. Applying the single-sided adhesive cushioning template fabric is also convenient; since no release agent is applied, there is no need to wait for it to dry, thus shortening preparation time.

[0045] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present utility model. They are only used to illustrate the technical ideas and features of the present utility model, with the aim of enabling those skilled in the art to understand the content of the present utility model and implement it accordingly. However, they are not limited to the present utility model, and the patent scope of the present utility model cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed in the present utility model, without departing from the structure of the present utility model, such as local improvements within the system and modifications or transformations between subsystems, are still within the patent scope of the present utility model.

Claims

1. An apparatus for jetting a concrete sample slab, characterized by, The back template (6) comprises a vertical rectangle, two vertical side templates (5) are vertically arranged on the left and right sides of the back template (6) respectively, and a top template (4) is arranged on the top of the back template (6), the back template (6), the side template (5) and the top template (4) form a dustpan shape with the mouth downward, and the side template (5) and the top template (4) are rotatably connected with the back template (6); The top of each of the two side templates (5) is fixedly connected with a locking ring (2), the top template (4) is provided with a through hole at a position corresponding to the locking ring (2), the locking ring (2) is arranged in the corresponding through hole in a penetrating mode, a plug rod (1) is inserted into the locking ring (2), and the plug rod (1) is located on the top surface of the top template (4).

2. An apparatus for jetting a concrete sample slab according to claim 1, wherein The inside of the top template (4), the side template (5) and the back template (6) is provided with a release layer (10).

3. An apparatus for jetting a concrete sample slab according to claim 2, wherein The release layer (10) is a single-sided adhesive buffer template cloth, one side of the single-sided adhesive buffer template cloth is a smooth surface, and the other side is a rough surface, and the smooth surface of the single-sided adhesive buffer template cloth is attached to the inside of the top template (4), the side template (5) and the back template (6).

4. An apparatus for jetting a concrete sample slab as defined in claim 1, wherein The back template (6) is provided with a notch (8) near the edge of the side template (5), the notch (8) is provided with a rotating plate (3), and the rotating plate (3) is fixedly connected with the side template (5).

5. An apparatus for jetting a concrete sample slab according to claim 4, wherein The outside of the side template (5) is fixedly connected with a short pipe (9), and the axis of the short pipe (9) is in a horizontal direction.

6. An apparatus for jetting a concrete sample slab as defined in claim 1 wherein, The side template (5) and the back template (6) and the top template (4) and the back template (6) are rotatably connected through hinges (7).

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