Device for detecting strength of concrete before initial setting

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a device for detecting the strength of concrete before initial setting, which comprises a mounting frame, a fixing component is mounted on one side of the mounting frame, and the fixing component is used for being connected with the outer wall of a slip form and fixing the detection device on the outer wall of the slip form; a measuring system is mounted on the mounting frame and comprises an impact hammer and a displacement measuring structure; one end of the impact hammer is in contact with the displacement measurement structure through a connecting piece, and one end, far away from the impact hammer, of the connecting piece is connected with the mounting frame, so that the impact hammer can swing by taking the connecting part of the connecting piece and the mounting frame as a base point; the displacement measuring structure is arranged on a moving path of the impact hammer; according to the utility model, the strength of the concrete is evaluated by measuring the depth change of the impact hammer of the system after impacting the surface of the concrete, so that the purpose of quickly and accurately detecting the strength of the concrete before initial setting after mold stripping is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a detection device for the strength of concrete before initial setting. Background Technique

[0002] At present, silo granaries are being vigorously constructed across the country. The main construction technology used in silo granary construction is slip form construction. The characteristics of slip form construction are fast construction speed, time-saving and labor-saving, which conform to the national advocated environmental protection, energy conservation and low-carbon development concepts and are favored by the silo industry. The problem in slip form construction is the determination of the concrete strength after form removal. If the concrete strength after form removal is too high, it is impossible for workers to finish the surface; if the concrete strength after form removal is too low, it will seriously affect the construction safety. In actual construction, workers use the construction method of pressing with fingers according to experience. Although this method is effective, it is greatly affected by objective factors, and there are large variables in the operation of different workers, making the measured concrete strength after form removal inaccurate;

[0003] Therefore, it is necessary to design a new detection device for the strength of concrete before initial setting to improve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a detection device for the strength of concrete before initial setting.

[0005] The utility model provides a detection device for the strength of concrete before initial setting, which includes an installation frame. A fixing component is installed on one side of the installation frame. The fixing component is used to connect with the outer wall of the slip form to fix the detection device on the outer wall of the slip form;

[0006] A measuring system is installed on the installation frame, which is used to evaluate the strength of concrete by the depth change after the impact hammer of the measuring system impacts the concrete surface;

[0007] The measuring system includes an impact hammer and a displacement measuring structure; one end of the impact hammer contacts the displacement measuring structure through a connecting piece. The end of the connecting piece far away from the impact hammer is connected with the installation frame, so that the impact hammer can swing with the connecting part of the connecting piece and the installation frame as the base point;

[0008] The displacement measuring structure is arranged on the moving path of the impact hammer and is used to measure the impact depth of the impact hammer on the concrete surface.

[0009] Further, the connecting piece is a flexible connection structure or a rigid connection structure;

[0010] The end of the rigid connection structure far away from the impact hammer is rotatably connected with the installation frame.

[0011] Further, the rigid connection structure includes a horizontally connecting portion and a vertically connecting portion that are connected to each other;

[0012] The horizontally connecting portion is rotatably connected to the mounting frame, and the vertically connecting portion is connected to the impact hammer.

[0013] Further, a counterweight is mounted on the horizontally connecting portion.

[0014] Further, the displacement measuring structure includes a pointer. One end of the pointer is connected to the mounting frame, and the projection of the position where the pointer is connected to the mounting frame coincides with the projection of the position where the impact hammer is connected to the mounting frame;

[0015] A protruding stop pin is mounted on the pointer. The stop pin is in contact with one end of the impact hammer through a connecting member. The stop pin is used to drive the pointer to move with the connecting member when the connecting member moves to the position where the pointer is located, so as to obtain the impact depth of the impact hammer on the concrete surface.

[0016] Further, the displacement measuring structure further includes a scale disk. The scale disk is mounted on the mounting frame. The pointer is rotatably connected to the scale disk, and the indicating part of the pointer points to the scale part of the scale disk.

[0017] Further, the fixing component is a magnetic attraction structure, and one end of the magnetic attraction structure is connected to the outer wall of the slip form.

[0018] Further, the magnetic attraction structure is connected to the mounting frame through an adjusting structure, and the adjusting structure is used to adjust the distance between the magnetic attraction structure and the mounting frame;

[0019] Further, at least two fixing components are provided.

[0020] Further, a horizontal indicating device is mounted on the top of the mounting frame.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] A measuring system is mounted on the mounting frame of the present utility model. The measuring system includes an impact hammer and a displacement measuring structure; one end of the impact hammer is connected to the displacement measuring structure through a connecting member, and the end of the connecting member away from the impact hammer is connected to the mounting frame, so that the impact hammer can swing with the connecting position of the connecting member and the mounting frame; the displacement measuring structure is arranged on the moving path of the impact hammer and is used to measure the impact depth of the impact hammer on the concrete surface; by measuring the depth change of the impact hammer after hitting the concrete surface, the strength of the concrete is evaluated, so as to quickly and accurately detect the strength of the concrete before the initial setting of the concrete after removing the form, improve the construction efficiency and reduce the construction risk. Description of the Drawings

[0023] The following drawings only schematically illustrate and explain the present utility model, and are not used to limit the scope of the present utility model, where:

[0024] Figure 1 : Schematic structural diagram of the detection device for the strength of the present utility model before the initial setting of concrete;

[0025] In the figure: 1, slip form; 2, magnet; 3, adjusting screw; 4, adjusting nut; 5, level; 6, counterweight; 7, rigid connection structure; 8, impact hammer; 9, trip needle; 10, pointer; 11, scale; 12, scale value. Specific embodiments

[0026] In order to make the purpose, technical solution, design method and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] As Figure 1 shown, the present utility model provides a detection device for the strength of concrete before initial setting, which is used to detect the strength of concrete before initial setting, and includes an installation frame. A fixing component is installed on one side of the installation frame, and the fixing component is a magnetic attraction structure, and the fixing component is used to connect with the outer wall of the slip form 1 to fix the detection device on the outer wall of the slip form 1;

[0028] A measuring system is installed on the installation frame, and the measuring system includes an impact hammer 8 and a displacement measuring structure; one end of the impact hammer 8 contacts the displacement measuring structure through a connecting member, and the end of the connecting member away from the impact hammer 8 is connected to the installation frame, so that the impact hammer 8 can swing with the connecting part of the connecting member and the installation frame as the base point;

[0029] The displacement measuring structure is arranged on the moving path of the impact hammer 8 and is used to measure the impact depth of the impact hammer 8 on the concrete surface; by measuring the depth change of the impact hammer 8 on the concrete surface after hitting the concrete surface, the strength of the concrete can be evaluated, so as to quickly and accurately detect the strength of the concrete before initial setting after removing the formwork, improve the construction efficiency and reduce the construction risk;

[0030] Among them, the connecting member is a flexible connection structure or a rigid connection structure 7;

[0031] The flexible connection structure can be a rope. Since the rope itself has flexibility, its connection method with the installation frame and the impact hammer 8 can be a rotating method or a fixed method, and those skilled in the art can choose according to the flexibility of the selected rope structure.

[0032] The rigid connection structure 7 can be a single-piece rod-shaped structure or a combined rod-shaped structure. One end of the rigid connection structure 7 away from the impact hammer 8 is rotatably connected to the mounting frame. In the embodiment of the present application, the rigid connection structure 7 includes a horizontally connected portion and a vertically connected portion that are connected to each other;

[0033] The horizontally connected portion is rotatably connected to the mounting frame, and the vertically connected portion is connected to the impact hammer 8.

[0034] Wherein, a counterweight 6 is installed on the horizontally connected portion.

[0035] It should be noted that the counterweight 6 is installed at different positions of the rigid connection structure 7 to adjust the centroid distribution and falling kinetic energy of the impact hammer 8; the kinetic energy during the fall of the impact hammer 8 is changed by increasing its mass. The position and size of the counterweight 6 can be adjusted as needed to adapt to concrete tests of different strengths and hardnesses; in the embodiment of the present application, the weight of the counterweight 6 is 200 g;

[0036] Wherein, the displacement measurement structure includes a pointer 10. One end of the pointer 10 is connected to the mounting frame, and the projection of the position where the pointer 10 is connected to the mounting frame coincides with the position where the impact hammer 8 is connected to the mounting frame;

[0037] A protruding stop pin 9 is installed on the pointer 10. The stop pin 9 is used to drive the pointer 10 to move with the connecting member when the connecting member moves to the position where the pointer 10 is located, so as to obtain the impact depth of the impact hammer 8 on the concrete surface. In the embodiment of the present application, the stop pin 9 is located at one-third of the pointer 10,

[0038] Wherein, the displacement measurement structure further includes a scale disk 11. The scale disk 11 is installed on the mounting frame. The length of the vertically connected portion is half of the length of the displacement measurement structure, and the value indicated by the pointer 10 on the scale disk 11 is amplified and displayed in proportion, which is convenient for reading the value on the scale disk 11 when the impact hammer 8 impacts the concrete;

[0039] The pointer 10 is rotatably connected to the scale disk 11, and the indicating part of the pointer 10 points to the scale part of the scale disk 11.

[0040] The fixing component is a magnetic attraction structure. One end of the magnetic attraction structure is connected to the outer wall of the slip form 1. Wherein, the magnetic attraction structure is connected to the mounting frame through an adjusting structure, and the adjusting structure is used to adjust the distance between the magnetic attraction structure and the mounting frame;

[0041] Among them, the adjusting structure includes an adjusting screw 3; the magnetic attraction structure is a circular magnet 2. One end of the adjusting screw 3 is provided with the circular magnet 2. One end of the adjusting screw 3 is connected to one end of the magnet 2, and the other end of the magnet 2 is adsorbed on the outer wall of the slip form 1. The other end of the adjusting screw 3 is connected to one side of the installation frame. An adjusting nut 4 is sleeved on the adjusting screw 3 for adjusting the distance between the magnetic attraction structure and the installation frame; a dial 11, a pointer 10, and a striking hammer 8 are installed on the installation frame at a position three centimeters away from the adjusting screw 3 for adjusting the distance; scale values 12 are set on the dial 11. One end of the pointer 10 is connected to the installation frame, and the other end of the pointer 10 points to the scale values 12;

[0042] It should be noted that when the striking hammer 8 falls and strikes the concrete, the rigid connection structure 7 connected to one end of the striking hammer 8 contacts the stop pin 9, and the rigid connection structure 7 pushes the stop pin 9 to move forward. The movement of the stop pin 9 will drive the pointer 10 to move on the dial 11, thereby recording the impact depth. Since the length of the vertical connection part in the rigid connection structure 7 is half of the length of the dial 11, when the striking hammer 8 strikes the concrete, the value pointed by the pointer 10 is magnified and displayed, and the impact depth data is magnified and displayed, which improves the convenience of observation. By reading the position of the pointer 10 on the dial 11, the sinking depth of the striking hammer 8 in the concrete can be accurately measured, and then the strength of the concrete can be evaluated;

[0043] At least two fixing components are provided; among them, the two fixing components are located on one side of the installation frame; one end of the fixing component is connected to one side of the installation frame, and the other end of the fixing component is adsorbed on the outer wall of the slip form 1;

[0044] A horizontal indicating device is installed on the top of the installation frame. Among them, the horizontal indicating device is a level 5;

[0045] Impact test principle: Install this detection device at the bottom end of the outer wall of the slip form 1, and install a measurement system on the installation frame. The measurement system includes a striking hammer 8 and a displacement measurement structure. One end of the striking hammer 8 contacts the displacement measurement structure through a connecting piece. The end of the connecting piece away from the striking hammer 8 is connected to the installation frame, so that the striking hammer 8 can swing with the connecting part of the connecting piece and the installation frame. The displacement measurement structure is arranged on the moving path of the striking hammer for measuring the impact depth of the striking hammer on the concrete surface;

[0046] When the concrete is taken out of the mold and before the initial setting of the concrete, the impact hammer 8 is freely dropped from a certain height to impact the surface of the concrete, and the impact hammer 8 will sink into the concrete to a certain depth. This depth is directly related to the hardness or strength of the concrete. Harder concrete will prevent the impact hammer 8 from sinking too deep, while softer concrete will allow the impact hammer 8 to sink deeper; the strength of the concrete is evaluated by the depth change after the impact hammer 8 impacts the surface of the concrete, so as to quickly and accurately detect the strength of the concrete before the initial setting after the concrete is taken out of the mold;

[0047] Measurement operation process: Before measurement, the detection device is adsorbed on the outer wall of the slip form 1 by the magnet 2 connected to one end of the adjusting screw 3. The other end of the adjusting screw 3 is connected to one side of the installation frame. The installation distance between the magnetic adsorption structure and the installation frame is adjusted through the adjusting structure, and the detection device is fixed on the outer wall of the slip form 1;

[0048] The impact hammer 8 and the displacement measurement structure are installed on the installation frame. The displacement measurement structure is arranged on the moving path of the impact hammer 8 and is used to measure the impact depth of the impact hammer on the concrete surface. When measuring the strength of the concrete before the initial setting after the concrete is taken out of the mold, first place the impact hammer 8 on the concrete surface and record the initial reading of the pointer 10; then place the impact hammer 8 at a certain height and release it. Release the impact hammer 8 to freely fall and impact the concrete surface, and record the value pointed by the pointer 10 on the displacement measurement structure after the impact on the scale 11; the difference between the two readings is the sinking depth of the impact hammer 8 in the concrete, which is also an indirect index of the concrete strength. The detection device indirectly evaluates the strength of the concrete by measuring the sinking depth of the impact hammer 8 in the concrete, and improves the convenience of observation through the scale value 12 on the scale 11; in order to obtain more accurate measurement results, the above operations can be repeated multiple times, and the average difference is taken as the final reference value.

[0049] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. A device for detecting the strength of concrete before initial setting, characterized in that: It includes a mounting frame, a fixing component is installed on one side of the mounting frame, and the fixing component is used to connect with the outer wall of the sliding form to fix the detection device on the outer wall of the sliding form; A measuring system is installed on the mounting frame, and the measuring system includes an impact hammer and a displacement measuring structure; one end of the impact hammer contacts the displacement measuring structure through a connecting piece, and the end of the connecting piece away from the impact hammer is connected to the mounting frame, so that the impact hammer can swing with the connection part between the connecting piece and the mounting frame as a base point; The displacement measuring structure is arranged on the moving path of the impact hammer and is used to measure the impact depth of the impact hammer on the concrete surface.

2. A detection device for the strength of concrete before initial setting according to claim 1, characterized in that: The connecting piece is a flexible connecting structure or a rigid connecting structure; The rigid connection structure is rotatably connected to the mounting frame at one end away from the impact hammer.

3. A detection device for the strength of concrete before initial setting according to claim 2, characterized in that: The rigid connection structure comprises a horizontal connection part and a vertical connection part connected to each other; The horizontal connection part is rotatably connected to the installation frame, and the vertical connection part is connected to the impact hammer.

4. A detection device for the strength of concrete before initial setting according to claim 3, characterized in that: A counterweight is installed on the horizontal connecting part.

5. The device for detecting the strength of concrete before initial setting according to claim 1, characterized in that: The displacement measurement structure comprises a pointer, one end of which is connected to the mounting frame, and the position where the pointer is connected to the mounting frame coincides with the projection of the position where the impact hammer is connected to the mounting frame; A protruding stop pin is installed on the pointer, and the stop pin is in contact with one end of the impact hammer through a connecting piece. The stop pin is used to drive the pointer to move with the connecting piece when the connecting piece moves to the position of the pointer, so as to obtain the impact depth of the impact hammer on the concrete surface.

6. A detection device for the strength of concrete before initial setting according to claim 5, characterized in that: The displacement measurement structure also includes a scale plate, which is mounted on the mounting frame. The pointer is rotatably connected to the scale plate, and the pointer indicates a scale position of the scale plate.

7. A detection device for the strength of concrete before initial setting according to claim 1, characterized in that: The fixing component is a magnetic attraction structure, and one end of the magnetic attraction structure is connected to the outer wall of the sliding mold.

8. A detection device for the strength of concrete before initial setting according to claim 7, characterized in that: The magnetic attraction structure is connected to the installation frame through an adjustment structure, and the adjustment structure is used to adjust the distance between the magnetic attraction structure and the installation frame.

9. A detection device for the strength of concrete before initial setting according to claim 1, characterized in that: At least two fixing components are provided.

10. A detection device for the strength of concrete before initial setting according to claim 1, characterized in that: A level indicating device is installed on the top of the installation frame.

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