Hole opening device for assisting in strength detection of structural concrete entity

Abstract

The utility model discloses a tapping device for assisting in detecting the solid strength of structural concrete, which comprises a disc seat detachably connected to the end part of a drill rod of a water drilling machine; a connecting hole is formed in one end of the disc seat, and a threaded hole is formed in the center of the disc seat; a first drill bit and a second drill bit are arranged at the other end of the disc seat and are concentrically arranged; the diameter of the first drill bit is more than 1.6 times that of the second drill bit, and the length of the first drill bit is smaller than that of the second drill bit. The tapping device for assisting the strength detection of the structural concrete entity is reasonable in structure and convenient to operate, and is used for processing an annular groove hole so as to obtain counter-force support for the strength detection of the structural concrete and ensure the test accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering technology and relates to an opening device for auxiliary structural concrete strength testing. Background Technology

[0002] Concrete strength testing is a crucial step in construction project quality control and structural safety assessment. The "Standard for Test Methods of Physical and Mechanical Properties of Concrete" (GBT50081-2019) specifically specifies methods for testing the flexural strength and compressive strength of concrete. However, these methods are limited to testing specially prepared beam-shaped or cubic specimens under standard curing conditions. This means the test results only indicate whether the concrete mix meets design requirements. In reality, during construction of concrete structures such as pavements, the concrete hardening process does not undergo standard curing, differing significantly from the molding conditions of the aforementioned standard specimens. Therefore, whether the flexural and compressive strengths of the actual structural concrete meet design requirements remains unknown.

[0003] Therefore, people are eager to know whether the flexural and compressive strengths of the structural concrete after construction meet the design requirements. The flexural strength and other properties of the concrete can be directly measured and calculated using a concrete strength testing device. However, this testing device requires the machining of concentric annular slots to provide a reaction point for the testing device.

[0004] Existing hole-making devices can only process one annular hole at a time. To process two concentric annular slots, two processing steps are required. Furthermore, ensuring concentricity between the two annular holes requires the operator's experience, which places higher demands on the operator's technical skills.

[0005] Therefore, there is an urgent need to design an opening device to assist in the testing of the strength of concrete structures, in order to solve the technical problems existing in the current technology. Utility Model Content

[0006] The purpose of this utility model is to at least partially solve some of the technical problems existing in the prior art, and to provide an auxiliary device for testing the strength of structural concrete. The device has a reasonable structure and is easy to operate. It is used for processing annular grooves to obtain the reaction force support for testing the strength of structural concrete and to ensure the accuracy of the test.

[0007] To solve the above-mentioned technical problems, this utility model provides an auxiliary device for testing the strength of concrete structures, which includes a disc base detachably connected to the end of a water drill rod; one end of the disc base is provided with a connecting hole and a threaded hole is provided at its center; the other end of the disc base is provided with a first drill bit and a second drill bit, which are concentrically arranged; the diameter of the first drill bit is more than 1.6 times the diameter of the second drill bit, and the length of the first drill bit is less than the length of the second drill bit.

[0008] In some embodiments, the diameter of the second drill bit is greater than twice the particle size of the coarse aggregate in the concrete to be drilled.

[0009] In some embodiments, the first drill bit and the second drill bit include a cylinder and cutting teeth disposed at the outer end of the cylinder, the cutting teeth having a Vickers hardness of 10000HV.

[0010] In some embodiments, the cutting tooth includes a cutting tooth matrix made of cemented carbide; diamond microparticles with a particle size of 40-100 μm are disposed on the outer side of the cutting tooth matrix, and the two are sintered together under high temperature and high pressure.

[0011] In some embodiments, the cylinder is made of carbon structural steel with a yield strength of 235 MPa.

[0012] In some embodiments, the material of the disk base is the same as the material of the cylinder, and the cylinders of the first drill bit and the second drill bit are welded to the disk base as a single unit.

[0013] In some embodiments, the cylindrical body has a circular structure and a wall thickness of 2.5 mm.

[0014] In some embodiments, the length of the first drill bit is 30-60 mm.

[0015] In some embodiments, the connecting hole is a tapered hole, with the diameter of its outer end being larger than the diameter of its inner end.

[0016] In some embodiments, the taper angle of the connecting hole is 30°.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides an auxiliary device for testing the strength of concrete structures. It has a reasonable structure and is easy to operate. It is used to process annular grooves to obtain the reaction force support for concrete strength testing and to ensure the accuracy of the test. Attached Figure Description

[0019] The advantages of this invention will become clearer and easier to understand through the following detailed description in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0020] Figure 1 This is a schematic diagram of an opening device for auxiliary structural concrete strength testing as described in this utility model;

[0021] Figure 2 yes Figure 1 A diagram of AA in the middle;

[0022] Figure 3 This is a schematic diagram of the tray base described in this utility model;

[0023] Figure 4 This is a schematic diagram of the concentric double-ring hole formed by the hole-opening device described in this utility model. Detailed Implementation

[0024] Figures 1 to 4 This is a schematic diagram of an opening device for auxiliary structural concrete strength testing as described in this application. The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0025] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0026] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the components of the embodiments of this utility model, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0027] A schematic diagram of the opening device for auxiliary structural concrete strength testing described in this utility model is shown below. Figure 1 As shown. The drilling device for auxiliary structural concrete strength testing includes a disc base 10, which is detachably connected to the end of the drill rod of a water drill rig; one end of the disc base 10 is provided with a connecting hole 11, and a threaded hole 12 is provided in its center; the other end of the disc base 10 is provided with a first drill bit 20 and a second drill bit 30, which are concentrically arranged; the diameter of the first drill bit 20 is more than 1.6 times the diameter of the second drill bit 30, and the length of the first drill bit 20 is less than the length of the second drill bit 30.

[0028] In some embodiments, the length of the first drill bit 20 is 30-60 mm. Preferably, the length of the first drill bit 20 is 50 mm.

[0029] Furthermore, the diameter of the second drill bit 30 is more than twice the particle size of the coarse aggregate in the concrete to be drilled.

[0030] Figure 2 yes Figure 1 The cross-sectional view of AA in the embodiment is... Figure 2 It can be seen that the cross-section of the disc base 10 is a regular hexagon, that is, the connecting surface 10a of the disc base 10 is a regular hexagon, so as to facilitate the connection with the drill rod of the water drill and transmit the torque of the water drill to the disc base 10.

[0031] The first drill bit 20 and the second drill bit 30 include a cylinder and cutting teeth 40 disposed at the outer end of the cylinder. The cutting teeth 40 have a Vickers hardness of 10000 HV. This Vickers hardness is equivalent to a Mohs hardness of grade 9, to ensure that the cutting teeth 40 have sufficient strength to cut concrete.

[0032] The cutting tooth 40 includes a cutting tooth matrix made of cemented carbide; diamond microparticles with a particle size of 40-100μm are disposed on the outer side of the cutting tooth matrix, and the two are sintered together under high temperature and high pressure.

[0033] In this invention, the cylinder is made of carbon structural steel with a yield strength of 235 MPa.

[0034] Furthermore, the material of the disc base 10 is the same as that of the cylinder body, and the cylinder bodies of the first drill bit 20 and the second drill bit 30 are welded together with the disc base 10. That is, the disc base 10 is also made of carbon structural steel with a yield strength of 235 MPa to ensure that the drilling device has good strength.

[0035] As one embodiment of this utility model, the cylinder has a circular structure and a wall thickness of 2.5 mm. Figure 1 In the embodiment shown, the wall thickness of the cylinder is 2.5 mm to ensure that the drill bit has good strength.

[0036] Figure 1 In the embodiment shown, the connecting hole 11 is a tapered hole, with the diameter of its outer end being larger than the diameter of its inner end.

[0037] Furthermore, the cone angle θ of the connecting hole 11 ( Figure 1 (As shown), the cone angle θ is 30°. The connection hole 11 facilitates the rapid flow of cooling water to the cutting teeth 40 of the drill bit, thereby promptly removing the heat generated by the cutting teeth 40 when cutting concrete, ensuring the quality of the opening in the concrete structure.

[0038] Figure 4This is a schematic diagram of the concentric double-ring hole formed by the hole-opening device described in this utility model. The depth of the inner hole 51 is greater than the depth of the outer hole 52, so as to apply a force to the side wall of the outer hole 52 and thus form a reverse force on the side wall of the inner hole 51, so as to break the concrete column formed by the inner hole 51 at the root.

[0039] Compared with the shortcomings and deficiencies of existing technologies, the present invention provides an opening device for auxiliary structural concrete strength testing. It has a reasonable structure and is easy to operate. It is used for processing annular grooves to obtain the reaction force support for concrete strength testing and ensure the accuracy of the test.

[0040] This utility model is not limited to the above-described embodiments. Anyone can derive other products in various forms under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. An opening device for assisting in the testing of the strength of concrete structures, characterized in that, It includes a base (10) which is detachably connected to the end of the drill rod of a water drill; one end of the base (10) is provided with a connecting hole (11) and a threaded hole (12) is provided at its center; the other end of the base (10) is provided with a first drill bit (20) and a second drill bit (30), which are concentrically arranged; the diameter of the first drill bit (20) is more than 1.6 times the diameter of the second drill bit (30), and the length of the first drill bit (20) is less than the length of the second drill bit (30).

2. The opening device according to claim 1, characterized in that, The diameter of the second drill bit (30) is more than twice the size of the coarse aggregate of the concrete to be drilled.

3. The opening device according to claim 1, characterized in that, The first drill bit (20) and the second drill bit (30) include a cylinder and cutting teeth (40) disposed at the outer end of the cylinder, wherein the Vickers hardness of the cutting teeth (40) is 10000HV.

4. The opening device according to claim 3, characterized in that, The cutting tooth (40) includes a cutting tooth matrix, which is made of cemented carbide; diamond microparticles with a particle size of 40-100μm are disposed on the outer side of the cutting tooth matrix, and the two are sintered together under high temperature and high pressure.

5. The opening device according to claim 3, characterized in that, The cylinder is made of carbon structural steel with a yield strength of 235 MPa.

6. The opening device according to claim 5, characterized in that, The material of the disk base (10) is the same as that of the cylinder body, and the cylinder bodies of the first drill bit (20) and the second drill bit (30) are welded together with the disk base (10).

7. The opening device according to claim 5, characterized in that, The cylinder has a circular structure and a wall thickness of 2.5 mm.

8. The opening device according to claim 1, characterized in that, The length of the first drill bit (20) is 30-60mm.

9. The opening device according to claim 1, characterized in that, The connecting hole (11) is a tapered hole, with the diameter of its outer end being larger than the diameter of its inner end.

10. The opening device according to claim 1, characterized in that, The cone angle of the connecting hole (11) is 30°.

Images