Concrete strength detection device
By combining a support body, lifting rod, expansion body, and acquisition device, the problem of poor detection results in thin concrete components is solved, and more accurate concrete strength testing is achieved.
Patent Information
- Application Number
- CN202520480855.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing methods for testing concrete strength are ineffective in thin structural members, especially in expandable structures where displacement can lead to inaccurate shear force tests.
The system employs a combined structure consisting of a support body, a lifting rod, an expansion body, and a data acquisition device. By utilizing the variable diameter section of the lifting rod and the expansion body, the expansion body moves within the operating hole to shear the concrete. Combined with the guiding effect of the guide groove and guide rod, the movement of the expansion body is stabilized, and the shear force is collected to calculate the concrete strength.
This improved the accuracy and stability of concrete strength testing and enhanced the reliability of test results.
Smart Images
Figure CN223955340U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to concrete detection technical field especially relates to a concrete strength detection device. BACKGROUND
[0002] The prefabricated structure needs to adopt part of site cast concrete due to the need of structure stress and connection, which leads to the relatively thin of these prefabricated components or connecting parts; if the concrete strength of these thin concrete components needs to be detected, the current commonly used concrete compressive strength detection technology, such as rebound method, ultrasonic rebound comprehensive method in non-damage detection method or drill core method, pull-out method, post-pull-out method, post-anchoring method, shear-lift comprehensive method in micro-damage detection method, all exist the low rigidity or the drill core hole depth exceeds or approaches the component thickness dilemma.
[0003] Based on the above factors, an expansion wedge type pulling device is proposed in the prior art, which moves the expandable structure on the conical part by the expandable structure and the conical part deep into the drill hole, and extrudes the drill hole wall to form a shear force, so as to calculate the strength of the concrete by the size of the shear force; the expandable structure is easy to produce deviation when moving, and the shear force test effect is poor. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a concrete strength detection device, which solves the problem of poor test effect.
[0005] To achieve this purpose, the utility model adopts the following technical scheme:
[0006] The concrete strength detection device is used for detecting the strength of concrete, and an operation hole is formed in the concrete. The concrete strength detection device comprises:
[0007] A support body is provided with a lifting hole. When the support body abuts against the concrete, the lifting hole is opposite to the operation hole.
[0008] A lifting rod is arranged in the lifting hole. The lifting rod is provided with a variable diameter section. The outer diameter of the variable diameter section gradually increases from one end to the other end. The variable diameter section can extend into the operation hole.
[0009] A plurality of expansion bodies are circumferentially arranged outside the lifting rod. The expansion bodies partially extend into the lifting hole. When the lifting rod is pulled out of the operation hole, the expansion bodies move in the direction of pulling out of the operation hole along with the lifting rod. The variable diameter section abuts against the expansion bodies to move away from each other, so that the outer wall of the expansion body abuts against the inner wall of the operation hole to shear the concrete. One side of the expansion body facing the lifting rod is provided with a guide groove, and the variable diameter section moves in the guide groove.
[0010] a collection piece configured to collect the shear force when the expansion body shears the concrete.
[0011] In some embodiments, the lifting rod further comprises a pull rod segment connected to one end of the variable diameter segment with a smaller outer diameter, the variable diameter segment comprises two semicircular bosses spliced together away from the arc surface of the bosses, two expansion bodies are provided, and the inner wall of the guide groove is attached to the arc surface.
[0012] In some embodiments, the expansion body is provided with a shearing protrusion away from the lifting rod, the shearing protrusion surrounds the lifting rod, and the shearing protrusion is pressed against the hole wall of the operation hole when the lifting rod is pulled.
[0013] In some embodiments, the shearing protrusion has an upper end surface and a lower end surface in the direction of pulling the lifting rod, and the included angle between the upper end surface and the lower end surface is an acute angle.
[0014] In some embodiments, the expansion body comprises a sticking part and a guide part, the sticking part is arc-shaped, the guide part is located on the convex side of the sticking part, the guide groove is provided on the concave side of the sticking part, one of the guide part and the support body is provided with a guide rod, and the other is provided with a guide hole matched with the guide rod.
[0015] In some embodiments, the support body is provided with a clamping cavity, the pulling hole penetrates through the clamping cavity, the inner wall of the clamping cavity is provided with a guide rod, and the guide part is provided with a guide hole.
[0016] In some embodiments, the guide rod is detachably connected with the inner wall of the clamping cavity.
[0017] In some embodiments, the end surface of the support body is provided with a groove, and the pulling hole is opened in the groove bottom.
[0018] In some embodiments, the collection piece is provided on the support body, and the collection piece is provided with a through hole for the lifting rod to pass through.
[0019] In some embodiments, the concrete strength detection device is further provided with a driving assembly, and the driving assembly drives the lifting rod to be drawn out of or inserted into the operation hole.
[0020] The beneficial effects of the utility model are as follows:
[0021] The support is placed on the concrete to be tested, with the variable-diameter section of the lifting rod and the portion of the expansion body protruding from the lifting hole extending into the operating hole. The lifting rod is pulled towards the operating hole. Through the resistance of the variable-diameter section, the expansion body moves with the lifting rod towards the operating hole, while the resistance pushes the expansion body away from each other, causing it to move obliquely towards the operating hole. This allows it to resist the inner wall of the operating hole. As the pulling force increases, the concrete is sheared. The concrete strength can be calculated by collecting the shear force through the acquisition device. The guide groove on the side of the expansion body facing the lifting rod makes the movement of the expansion body more stable during the movement of the lifting rod, improving the accuracy of the test results. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the concrete strength testing device of this utility model;
[0023] Figure 2 This is a cross-sectional view of the concrete strength testing device of this utility model;
[0024] Figure 3 This is a schematic diagram of the lifting rod in this utility model;
[0025] Figure 4 This is a cross-sectional view of the expansion body in this utility model;
[0026] Figure 5 This is a schematic diagram of the support body in this utility model;
[0027] Figure 6 This is a schematic diagram of the pressure plate in this utility model.
[0028] In the picture:
[0029] 1. Support body; 11. Lifting hole; 12. Clamping cavity; 13. Groove; 14. Support plate; 15. Pressure plate; 151. Plate body; 152. Plate wall;
[0030] 2. Lifting rod; 21. Variable diameter section; 22. Tie rod section;
[0031] 3. Expanding body; 31. Adhesive part; 32. Guide part; 33. Guide groove; 34. Press-shear protrusion; 341. Upper end face; 342. Lower end face; 35. Guide hole;
[0032] 4. Collected documents;
[0033] 5. Guide rod;
[0034] 6. Drive assembly; 61. Bearing; 62. Nut; 63. Force application handle. Detailed Implementation
[0035] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0036] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0037] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0038] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0039] As Figures 1 to 6As shown, the present application provides a concrete strength detection device for detecting the strength of concrete, which needs to open an operation hole on the concrete during detection, and the opening mode of the operation hole is not limited; the concrete strength detection device comprises a support body 1, a lifting rod 2, expansion bodies 3 and a collection piece 4, the support body 1 is provided with a pulling hole 11, the pulling hole 11 is opposite to the operation hole when the support body 1 abuts against the concrete; the lifting rod 2 is provided through the pulling hole 11, the lifting rod 2 is provided with a variable diameter section 21, the outer diameter of the variable diameter section 21 gradually increases from one end to the other end of the lifting rod 2, and the variable diameter section 21 can extend into the operation hole; a plurality of expansion bodies 3 are circumferentially surrounded outside the lifting rod 2, the expansion bodies 3 partially extend into the pulling hole 11, when the lifting rod 2 is pulled in the direction of withdrawing the operation hole, the plurality of expansion bodies 3 move in the direction of withdrawing the operation hole along with the lifting rod 2, and the variable diameter section 21 abuts against the plurality of expansion bodies 3 to move away from each other, so that the outer wall of the expansion body 3 abuts against the inner wall of the operation hole to shear the concrete; one side of the expansion body 3 facing the lifting rod 2 is provided with a guide groove 33, and the variable diameter section 21 moves in the guide groove 33; the collection piece 4 is configured to collect the shearing force when the expansion body 3 shears the concrete.
[0040] The support body 1 is placed at the concrete to be detected, the variable diameter section 21 of the lifting rod and the part of the expansion body 3 exposed from the pulling hole 11 extend into the operation hole, the lifting rod 2 is pulled in the direction of withdrawing the operation hole, through the abutment of the variable diameter section 21, the expansion body 3 moves in the direction of withdrawing the operation hole along with the lifting rod 2 on one hand, and abuts against the expansion body 3 to move away from each other on the other hand, that is, the expansion body 3 moves obliquely in the direction of withdrawing the operation hole, and then the expansion body 3 can abut against the inner wall of the operation hole, and the shearing force can be collected by the collection piece 4 during the increase of the pulling force to calculate the strength of the concrete; the guide groove 33 on the side of the expansion body 3 facing the lifting rod 2 can make the expansion body 3 move more stably during the movement of the lifting rod, and improve the accuracy of the test results.
[0041] As shown in the drawings, Figure 3 In some embodiments, the lifting rod 2 comprises a pull rod section 22 and a variable diameter section 21, the pull rod section 22 is connected to one end of the variable diameter section 21 with smaller outer diameter, the end of the variable diameter section 21 with larger outer diameter is the second end of the lifting rod 2, and the end of the pull rod section 22 away from the variable diameter section 21 is the first end of the lifting rod 2; the variable diameter section 21 comprises two semicircular bosses, the two bosses are spliced along the side away from the arc surface to form the variable diameter section 21, so that the cross section of the variable diameter section 21 is in the shape of 8. Based on the above form of the lifting rod, as shown in the drawings, Figure 3 and Figure 4 In the present embodiment, two expansion bodies 3 are also provided, the inner walls of the guide grooves 33 on the two expansion bodies 3 are fitted to the arc surface of the variable diameter section 21, so that the expansion bodies 3 can move along the arc surface to ensure stable movement of the expansion bodies 3. In addition, the two expansion bodies 3 also make the overall structure more compact, and make the shearing more uniform.
[0042] As shown in Figure 4 In some embodiments, the expansion body 3 includes a fitting portion 31 and a guide portion 32. The fitting portion is arc-shaped, and the fitting portions 31 of the two expansion bodies 3 enclose the outer side of the variable-diameter section 21 of the lifting rod. The guide groove 33 is arranged on the concave side of the fitting portion. The guide portion 32 is arranged on the convex side of the fitting portion, so that the longitudinal section of the expansion body 3 is in the shape of “7”. The guide portion 32 is provided with a guide rod 5 on one of the support bodies 1, and the other is provided with a guide hole 35 matched with the guide rod 5. The guide rod 5 is inserted into the guide hole 35, so that the movement of the expansion body 3 is guided not only by the guide groove 33, but also by the cooperation of the guide rod 5 and the guide hole 35, further improving the stability of the expansion body 3 during movement. It can be understood that the guide hole 35 is arranged obliquely along the guide portion 32, and the extension direction is the same as the movement direction of the expansion body 3.
[0043] As shown in Figure 5 and Figure 6 In order to facilitate the installation of the guide rod 5 and provide a movement space for the expansion body 3, the support body 1 is provided with a clamping cavity 12. The support body 1 includes a support disc 14 and a pressing disc 15. The pressing disc 15 includes a disc body 151 and a disc wall 152. The disc wall 152 is arranged on the disc body 151 to form a clamping groove. The support disc 14 is buckled on the disc wall 152 to close the slot of the clamping groove, so as to form the clamping cavity 12 between the support disc 14 and the disc body 151. The lifting hole 11 penetrates the clamping cavity 12, the disc body 151 and the pressing disc 15. The guide portion 32 of the expansion body 3 is located in the clamping cavity 12, and the fitting portion of the expansion body 3 extends out of the clamping cavity 12 through the lifting hole 11, so as to ensure compactness. In the present embodiment, the guide rod 5 is arranged on the support wall, and the guide hole 35 is arranged on the guide portion 32. In some embodiments, in order to facilitate disassembly and replacement, the guide rod 5 is detachably connected with the inner wall of the clamping cavity 12, that is, the guide rod 5 is detachably connected with the support wall, so as to detach the guide rod 5 from the support wall, and facilitate the expansion body 3 to separate from the support body 1. Exemplarily, the end of the guide rod 5 can be provided with a thread, so as to fix the guide rod 5 on the support body 1 by bolts.
[0044] As shown in Figure 4As shown, in order to make it more convenient to cut the concrete, in some embodiments, the expansion body 3 is further provided with a pressure shear protrusion 34, which is arranged on the abutting part and located on the side away from the lifting rod 2. The pressure shear protrusion 34 is arranged around the lifting rod 2. When the two abutting parts 31 are spliced, the protrusions around the two abutting parts 31 enclose the lifting rod 2. When the lifting rod 2 is pulled, the pressure shear protrusion 34 abuts against the hole wall of the pressure shear operation hole, thereby reducing the contact area between the expansion body 3 and the hole wall, and making the pressure shear more convenient. In the current embodiment, the pressure shear protrusion 34 has an upper end surface 341 and a lower end surface 342 in the direction of pulling the lifting rod 2. The included angle between the upper end surface 341 and the lower end surface 342 is a, which is an acute angle. Exemplarily, the included angle is 45°. The force direction of the pressure shear is inclined relative to the pulling direction, which can better exert force and conveniently abut against the pressure shear.
[0045] As shown, Figure 5 Further, the end surface of the support body 1 is provided with a groove 13. Specifically, the side of the support disc 14 away from the pressure disc 15 is provided with the groove 13. The pulling hole 11 is arranged on the groove bottom of the groove 13. When the end surface of the support disc 14 abuts against the concrete, there is a gap between the edge of the operation hole and the edge of the groove 13. When the expansion body 3 abuts against the hole wall of the operation hole, the part between the edge of the operation hole and the edge of the groove 13, which is not bound by the support body 1, is easily deformed and thus is subjected to pressure shear. That is, the groove 13 facilitates the pressure shear.
[0046] As shown, Figure 2 The concrete strength detection device is further provided with a driving assembly 6. The driving assembly 6 drives the lifting rod 2 to be pulled out of or inserted into the operation hole, so that the variable diameter section 21 abuts against the expansion body 3. In order to optimize the space and facilitate operation, in some embodiments, the driving assembly 6 includes a bearing 61 and a nut 62. The bearing 61 is fixed on the side of the pressure disc 15 away from the support disc 14, and the pull rod section 22 of the lifting rod 2 passes through the bearing 61. The pull rod section 22 is further provided with a thread, and the nut 62 is screwed on the pull rod section 22. Thus, the lifting rod 2 can be pulled by rotating the nut 62. Further, in order to facilitate force exertion, a plurality of force exertion handles 63 are arranged on the nut 62. In order to further optimize the space and facilitate data collection, in some embodiments, the collection piece 4 is arranged on the side of the pressure disc 15 away from the support disc 14, and the collection piece 4 is provided with a through hole through which the lifting rod 2 passes, so that the pull rod section 22 of the lifting rod 2 passes through. The bearing 61 is arranged on the side of the collection piece 4 away from the pressure disc 15. In the current embodiment, the collection piece 4 is a pressure sensor, which is connected in series with the pressure disc 15 of the support body 1, so as to measure the pressure shear force through the reaction force generated on the pressure disc 15 when the pressure shear is performed. It should be noted that the model of the pressure sensor is not limited.
[0047] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A concrete strength testing device for testing the strength of concrete having an operation hole formed therein, characterized by, The concrete strength detection device comprises: A support body (1) provided with a pulling hole (11) opposite to the operation hole when the support body (1) abuts against the concrete; A lifting rod (2) penetrating through the pulling hole (11), the lifting rod (2) being provided with a variable-diameter section (21), the outer diameter of the variable-diameter section (21) gradually increasing from one end to the other end, the variable-diameter section (21) being capable of extending into the operation hole; A plurality of expansion bodies (3) circumferentially surrounding the outer side of the lifting rod (2), the expansion bodies (3) partially extending into the pulling hole (11), when the lifting rod (2) is pulled out in the direction of the operation hole, the expansion bodies (3) move with the lifting rod (2) in the direction of the operation hole, and the variable-diameter section (21) abuts against the mutually separated expansion bodies (3) to make the outer wall of the expansion bodies (3) abut against the inner wall of the operation hole to shear the concrete; one side of the expansion bodies (3) facing the lifting rod (2) is provided with a guide groove (33), and the variable-diameter section (21) moves in the guide groove (33); A collection piece (4) configured to collect the shearing force of the expansion bodies (3) when shearing the concrete.
2. The concrete strength detection apparatus of claim 1, wherein The lifting rod (2) further comprises a pull rod section (22) connected to the end of the variable-diameter section (21) with a smaller outer diameter, the variable-diameter section (21) comprises two semicircular bosses, the two bosses are spliced away from one side of the arc surface of the bosses, the expansion bodies (3) are provided in two, and the inner wall of the guide groove (33) is fitted with the arc surface.
3. The concrete strength detection apparatus of claim 1, wherein One side of the expansion bodies (3) away from the lifting rod (2) is provided with a shearing protrusion (34) surrounding the lifting rod (2), when the lifting rod (2) is pulled, the shearing protrusion (34) abuts against and shears the hole wall of the operation hole.
4. The concrete strength detection apparatus of claim 3, wherein In the direction of pulling the lifting rod (2), the shearing protrusion (34) has an upper end surface (341) and a lower end surface (342), and the included angle between the upper end surface (341) and the lower end surface (342) is an acute angle.
5. The concrete strength detection apparatus of claim 1, wherein The expansion bodies (3) comprise a sticking part (31) and a guide part (32), the sticking part (31) is arc-shaped, the guide part (32) is located on the convex side of the sticking part (31), the guide groove (33) is provided on the concave side of the sticking part (31), and one of the guide part (32) and the support body (1) is provided with a guide rod (5), and the other is provided with a guide hole (35) matched with the guide rod (5).
6. The concrete strength detection apparatus of claim 5, wherein The support body (1) is provided with a clamping cavity (12), the pulling hole (11) penetrates through the clamping cavity (12), the inner wall of the clamping cavity (12) is provided with a guide rod (5), and the guide part (32) is provided with a guide hole (35).
7. The concrete strength detection apparatus of claim 6, wherein The guide rod (5) and the inner wall of the clamping cavity (12) are detachably connected.
8. The concrete strength detection apparatus of claim 1, wherein The end surface of the support body (1) is provided with a groove (13), and the pulling hole (11) is arranged at the groove bottom of the groove (13).
9. The concrete strength detection apparatus of claim 1, wherein The collecting piece (4) is arranged on the support body (1), and the collecting piece (4) is provided with a perforation through which the lifting rod (2) passes.
10. The concrete strength detection apparatus of claim 1, wherein The concrete strength detection device is further provided with a driving assembly (6), and the driving assembly (6) drives the lifting rod (2) to be drawn out or inserted into the operation hole.