A concrete core sample or pavement water stable layer core sample holding device

Abstract

The utility model discloses a kind of concrete core sample or road surface water stable layer core sample clamping devices, comprising: clamping component, the clamping component includes pedestal, pedestal lower end left and right sides are respectively provided with the clamping piece of vertically downward extension, clamping piece has elastic deformation capacity, the cross section of clamping piece is the arc shape of being compatible with core sample appearance;Clamping force component, the clamping force component operable engagement clamping piece, force clamping piece lower portion to move to core sample to generate clamping force.The clamping piece of pedestal lower end vertically downward extension in the utility model, the cross section of clamping piece is the arc shape of being compatible with core sample appearance, clamping piece can be in-depth core sample outer circumferential surface four around gap, increase the contact area with core sample, not only increase the friction force and facilitate clamping, additionally, can also increase the integrity of core sample.

Description

Technical Field

[0001] This utility model relates to the field of core sampling technology, and in particular to a clamping device for concrete core samples or pavement water-stabilized layer core samples. Background Technology

[0002] Core sampling of cement concrete pavement or water-stabilized layer is a key procedure in pavement quality acceptance. Cylindrical core samples are drilled from the paved pavement and brought back to the laboratory for physical and mechanical property testing to assess whether the actual construction quality meets the design and specification requirements.

[0003] Chinese utility model patent with publication number CN207480418U discloses a core sample gripper, including a gripper body. The gripper body is generally scissor-shaped. The gripper body includes a handle, a connecting part, and a gripping part. The inner side of the gripping part is inclined from the root of the gripping part to the end of the gripping part, so that the gripping part forms a structure in which the width gradually decreases from the root to the end. The included angle between the connecting part and the corresponding gripping part is greater than or equal to 135° and less than 150°.

[0004] However, the device in the aforementioned utility model patent is scissor-shaped, making it difficult to insert deeply into the vertically downward gap on the outer periphery of the core sample. When faced with a large-diameter, deep, and relatively heavy core sample, coupled with the suction force of water inside the hole, the small contact area between the gripping part of the device and the core sample results in low friction. The existing core sample clamps simply cannot grip it, making it difficult to remove the core sample from the road hole and easily damaging the integrity of the core sample. Utility Model Content

[0005] In order to solve the problems in the prior art, this utility model provides a clamping device for concrete core samples or pavement water-stabilized layer core samples.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A clamping device for concrete core samples or pavement water-stabilized layer core samples includes: The clamping component includes a base, and clamping pieces extending vertically downward are respectively provided on the left and right sides of the lower end of the base. The clamping pieces have elastic deformation capability, and the cross-section of the clamping pieces is an arc shape that matches the shape of the core sample. A clamping force member, which is operable to engage a clamping piece, forces the lower part of the clamping piece to move toward the core to generate a clamping force.

[0007] Preferably, the top end of the clamping piece and the bottom end of the base are integrally connected.

[0008] Preferably, the clamping piece has a hole on its upper part; The clamping force component includes a first fastener, which is rod-shaped and passes through a hole in the upper part of the clamping piece in a horizontal direction. A second fastener is threadedly connected to the first fastener on the outer curved surface of the clamping piece. The first fastener and the second fastener cooperate to provide clamping force to the clamping piece.

[0009] Preferably, the second fastener has a handle for easy hand tightening.

[0010] Preferably, a sleeve is provided between the second fastener and the outer curved surface of the clamping piece. The second fastener transmits clamping force to the clamping piece through the sleeve. The sleeve is fitted on the outside of the first fastener to facilitate hand gripping when extracting the core sample upwards.

[0011] Preferably, the clamping member is formed by cutting a through notch in the middle of a steel pipe that is compatible with the diameter of the core sample. The notch extends axially downward from near the top of the steel pipe to the lower end face of the steel pipe. The clamping pieces are formed on the pipe walls on the left and right sides of the notch, and the top part of the notch forms a base.

[0012] Preferably, the first fastener is a lead screw and the second fastener is a wing nut.

[0013] The beneficial effects of this utility model are: 1. A clamping piece extends vertically downward from the lower end of the base. The cross-section of the clamping piece is an arc shape that matches the shape of the core sample. The clamping piece can penetrate into the gaps around the outer circumference of the core sample, increasing the contact area with the core sample. This not only increases friction for easier clamping, but also increases the integrity of the core sample.

[0014] 2. The first fastener is rod-shaped and passes through the hole at the top of the clamping plate in the horizontal direction. The first fastener is threaded to the second fastener on the outer curved surface of the clamping plate. Tightening the second fastener provides a larger clamping force to the clamping plate, which is beneficial for clamping large-diameter, deep and heavy core samples.

[0015] 3. The clamping component is formed by cutting a through notch along the axial direction in the middle of a steel pipe. The notch starts from near the top of the steel pipe and extends axially downward to the lower end face of the steel pipe. The pipe walls on both sides of the notch form clamping plates, and the top part of the notch forms a base. The threaded rod, wing nut and steel pipe sleeve form the clamping force component. All parts are made from local materials. The clamping component can be formed by simply cutting the steel pipe. No special manufacturing tools are required. The manufacturing process is extremely simple, which reduces the manufacturing cost and has strong practicality. Attached Figure Description

[0016] Figure 1 This is a front view of the utility model; Figure 2 This is a frontal three-dimensional structural diagram of the present invention; Figure 3 This is an exploded view of the present invention; The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figure 1-3 As shown, a concrete core sample or pavement water-stabilized layer core sample clamping device includes a clamping component 1 and a clamping force component 2.

[0019] The clamping component 1 includes a base 11, and clamping pieces 13 extending vertically downward are respectively provided on the left and right sides of the lower end of the base 11. The clamping pieces 13 have elastic deformation capability, and the cross-section of the clamping pieces 13 is an arc shape that matches the shape of the core sample.

[0020] To facilitate the connection between the base and the arc-shaped clamping piece, in this embodiment, the top end of the clamping piece 13 and the lower end of the base 11 are integrally connected, and the cross-section of the base 11 is circular.

[0021] To reduce manufacturing difficulty and processing costs, in this embodiment, locally sourced materials are used. The clamping component 1 is formed by cutting a through notch 14 in the middle of a steel pipe with an inner diameter of 150 mm and a cylindrical length of 550 mm. The notch 14 extends axially downward from 100 mm from the top of the steel pipe to its lower end face. The pipe walls on the left and right sides of the notch 14 form the clamping pieces 13, and the top part of the notch 14 forms the base 11.

[0022] The clamping force member 2 engages the clamping piece 13, forcing the lower part of the clamping piece 13 to move toward the core sample to generate a clamping force.

[0023] Specifically, the clamping force component 2 includes a first fastener, which is rod-shaped. The upper part of the clamping plate 13 has a hole 12. The first fastener passes through the hole 12 in the horizontal direction. The first fastener is threaded to a second fastener on the outer curved surface of the clamping plate 13. The first fastener and the second fastener cooperate to provide clamping force to the clamping plate.

[0024] For ease of manufacturing, in this embodiment, locally sourced materials are used, and the first fastener is a lead screw 22.

[0025] To facilitate tightening, the second fastener has a handle for easy manual tightening. In this embodiment, the second fastener is a wing nut 21.

[0026] To facilitate gripping, a sleeve 23 is provided between the second fastener and the outer curved surface of the clamping piece 13. The second fastener transmits clamping force to the clamping piece through the sleeve 23. The sleeve 23 is sleeved on the outside of the first fastener and is used to facilitate gripping by hand when extracting the core sample upwards. In this embodiment, the sleeve 23 is made of steel pipe.

[0027] Lead screws and wing nuts are existing technologies, and their structures are irrelevant to the present invention, so they will not be described in detail here.

[0028] The working principle of this utility model is as follows: First, after the coring operation on the road surface, remove the coring machine, clean the drilled area, and ensure that no residual debris falls into the annular hole. Check whether the root of the core sample inside the hole has detached and whether it can be moved inside the hole. Next, insert the lower end of the clamping plate 13 into the drill hole gap, and the inner wall of the clamping plate 13 contacts the core sample. Tighten the wing nuts 21 on both sides, and the wing nuts 21 move closer to the clamping plate 13, and drive the sleeve 23 to move closer to the clamping plate 13, thereby transmitting the clamping force. The lower parts of the two clamping plates 13 undergo elastic deformation and move closer to each other, thereby clamping the core sample.

[0029] Finally, by holding the sleeves 23 on both sides and lifting them upwards, the core sample can be removed. Then, place the core sample on a flat surface, loosen the wing nut 21, and the clamping plate 13 will return to its original shape due to the elastic force, thus separating from the core sample and completing this operation.

[0030] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0031] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A clamping device for concrete core samples or pavement water-stabilized layer core samples, characterized in that, include: The clamping component includes a base, and clamping pieces extending vertically downward are respectively provided on the left and right sides of the lower end of the base. The clamping pieces have elastic deformation capability, and the cross-section of the clamping pieces is an arc shape that matches the shape of the core sample. A clamping force member, which is operable to engage a clamping piece, forces the lower part of the clamping piece to move toward the core to generate a clamping force.

2. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 1, characterized in that, The top of the clamping plate and the bottom of the base are connected as a single unit.

3. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 1, characterized in that, The clamping piece has a hole on its upper part; The clamping force component includes a first fastener, which is rod-shaped and passes through a hole in the upper part of the clamping piece in a horizontal direction. A second fastener is threadedly connected to the first fastener on the outer curved surface of the clamping piece. The first fastener and the second fastener cooperate to provide clamping force to the clamping piece.

4. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 3, characterized in that, The second fastener has a handle for easy hand tightening.

5. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 3, characterized in that, A sleeve is provided between the second fastener and the outer curved surface of the clamping plate. The second fastener transmits clamping force to the clamping plate through the sleeve. The sleeve is fitted on the outside of the first fastener to facilitate hand gripping when extracting the core sample upwards.

6. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 3, characterized in that, The clamping member is formed by cutting a through notch along the axial direction in the middle of a steel pipe that is adapted to the diameter of the core sample. The notch extends axially downward from near the top of the steel pipe to the lower end face of the steel pipe. The pipe walls on the left and right sides of the notch form the clamping pieces, and the top part of the notch forms a base.

7. The concrete core sample or pavement water-stabilized layer core sample clamping device as described in claim 3, characterized in that, The first fastener is a lead screw, and the second fastener is a wing nut.

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