CN209945865U

CN209945865U - Clamping device and tensile test device

Info

Publication number: CN209945865U
Application number: CN201920830884.1U
Authority: CN
Inventors: 王玉果; 李斌; 贾俊峰
Original assignee: Beijing University of Technology; CCCC First Highway Engineering Group Co Ltd; Haiwei Engineering Construction Co Ltd of FHEC of CCCC
Current assignee: Beijing University of Technology; CCCC First Highway Engineering Group Co Ltd; Haiwei Engineering Construction Co Ltd of FHEC of CCCC
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-01-14
Anticipated expiration: 2029-06-03

Abstract

The utility model provides a clamping device and tensile test device belongs to the concrete test technical field. The clamping device comprises two clamps and two connecting pieces, the two ends of the concrete test piece can be respectively embedded in the clamps, the clamps are tightly matched with the two ends of the concrete test piece, and when the concrete test piece is embedded in the clamps, the connecting pieces are connected with one side, far away from the concrete test piece, of the clamps for connecting the clamps and the testing device. The tensile test device comprises a tensile member and the clamping device, and the connecting pieces of the clamping device are respectively connected with the tensile member. An object of the utility model is to provide a clamping device and tensile test device inlays the tip with the test piece and establishes in this clamping device's contained angle, makes the test piece can even atress when tensile to make this accuracy that improves tensile test data.

Description

Clamping device and tensile test device

Technical Field

The utility model relates to a concrete test technical field particularly, relates to a clamping device and tensile test device.

Background

With the rapid development of economy in China, infrastructure construction and commercial building construction in various regions bloom all over the land. Strength members cast of concrete are widely used in infrastructure construction and commercial building construction.

In actual construction, in order to meet the requirements of engineering design, it is necessary to test the tensile resistance and other properties of concrete used for manufacturing the strength member. In the test of the concrete tensile property, a concrete test piece needs to be stretched by a concrete tensile test device. However, when the existing concrete tensile test device is used for stretching a concrete test piece, the concrete test piece is not accurate in tensile test data due to the fact that the concrete test piece is uneven in tensile stress.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a clamping device and tensile test device inlays the tip with the test piece and establishes in this clamping device's contained angle, makes the test piece can even atress when tensile to improve the accuracy of tensile test data.

The embodiment of the utility model is realized like this:

an aspect of the embodiment of the utility model provides a clamping device, include: two anchor clamps and two connecting pieces, the both ends of concrete sample can inlay respectively and locate in the anchor clamps, and the tip of anchor clamps and concrete sample closely cooperates, and one side fixed connection that concrete sample was kept away from with two anchor clamps respectively to two connecting pieces for connect the tensile test device.

Optionally, the clamp includes at least two clamping portions, and the at least two clamping portions are sequentially connected to form a closed ring to form the clamp.

Optionally, two adjacent clamping portions are connected through a bolt.

Optionally, one side of the clamp connecting piece is provided with a supporting part, and when the concrete sample is embedded between the two clamps, the connecting piece abuts against one side of the supporting part close to the concrete sample.

Optionally, the connecting piece includes a body and a hook connected to one side of the body, and the abutting portion abuts against the hook.

Optionally, a connecting hole is formed in one side of the body, which is far away from the hook, and is used for being connected with a tensile test device.

Optionally, the clamping device further comprises a hanging part, the hanging part is hung on the body through a connecting hole, and the connecting piece is connected with the tensile test device through the hanging part.

Optionally, a recessed portion is formed on one side of the abutting portion abutting against the hook, and the hook abuts against the recessed portion.

Optionally, the hook is formed with a raised portion, the raised portion abutting the recessed portion.

The utility model discloses on the other hand of embodiment provides a tensile test device, include: the clamping device comprises a stretching component and any one of the clamping devices, wherein the two ends of the stretching component are respectively stressed in the opposite directions in the same linear direction, and two connecting pieces of the clamping device are respectively connected with the two opposite stress application ends of the stretching component.

The utility model discloses beneficial effect includes:

an embodiment of the utility model provides a pair of clamping device, including two anchor clamps and two connecting pieces. When the clamp is used, the two ends of the concrete test piece are embedded in the clamp respectively, so that the clamp and the two ends of the concrete test piece can be matched closely. The connecting pieces are respectively arranged on one side of the clamp far away from the concrete test piece, and the tensile test device is respectively connected with the two connecting pieces, so that the experimental device can apply tensile force to the clamp positioned at two ends of the concrete test piece through the connecting pieces. Because the both ends of concrete sample inlay respectively and locate in the anchor clamps, so the pulling force of the experimental apparatus that anchor clamps received can pass through the even transmission of anchor clamps to the concrete sample on, the pulling force subsection that makes the concrete sample receive is more even to the concrete sample passes through the anchor clamps transmission, and the pulling force resultant force direction that receives is for the axial extension along the concrete sample, makes the phenomenon of eccentric displacement can not appear at tensile in-process in the concrete sample, and then improves the accuracy of concrete sample tensile test's data.

The embodiment of the utility model provides a tensile test device, including tensile member and foretell clamping device, can make the tensile member of this tensile test device exert pulling force evenly distributed on the test piece through clamping device's anchor clamps, and tensile reasonable can follow the axial extension of test piece, reduces the eccentric phenomenon that the test piece appears when tensile to the experimental data that obtains when making to carry out tensile test to the test piece through this tensile test device is more accurate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a clamping device according to an embodiment of the present invention;

fig. 2 is a second schematic structural view of a clamping device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a connecting member of a clamping device according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a hanging portion of the clamping device according to an embodiment of the present invention.

Icon: 110-a clamp; 111-a holding portion; 1110-a recess; 120-a connector; 121-body; 122-a hook; 1220-a projection; 1221-a connection hole; 130-hanging part; 210-concrete test piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An embodiment of the utility model provides a clamping device, as shown in fig. 1 and fig. 2, include: the two ends of the concrete test piece 210 can be respectively embedded in the clamp 110 (as shown in fig. 1), the clamp 110 is tightly matched with the end of the concrete test piece 210, and the two connecting pieces 120 are respectively fixedly connected with one sides of the two clamps 110 far away from the concrete test piece 210 and used for connecting a tensile test device.

It should be noted that, first, in practical applications, the fixture 110 may be an integral structure or a detachable structure, and therefore, the embodiment of the present invention is not limited specifically. When the fixture 110 is provided as an integral structure, the concrete specimen 210 may be embedded in the fixture 110 by casting and solidifying, or may be provided in a nested manner. Generally, in order to firmly connect the end of the concrete sample 210 embedded in the clamp 110 with the clamp 110, the clamp 110 is configured to be a circular truncated cone, a trapezoidal table, or the like with a large end face and a small end face, when the end of the concrete sample 210 is embedded in the clamp 110 by pouring, the end of the concrete sample 210 matches with the shape of the clamp 110, so that the small end face of the clamp 110 can limit the end of the concrete sample 210, thereby reducing the occurrence of slipping-out of the end of the concrete sample 210 in the stretching process due to small friction force between the end and the clamp 110. Of course, in the embodiment of the present invention, the clamp 110 may also be other shapes, such as a cylinder, a square, etc., and is not limited herein.

Second, can be connected through bolted connection, butt, mode such as between connecting piece 120 and the tensile test device the embodiment of the utility model provides an in, do not specifically limit to the connected mode between connecting piece 120 and the tensile test device.

The embodiment of the utility model provides a clamping device, including two anchor clamps 110 and two connecting pieces 120. When the method is applied, two ends of the concrete specimen 210 are respectively embedded in the clamp 110, so that the clamp 110 can be tightly matched with the two ends of the concrete specimen 210. The connecting members 120 are respectively disposed at the sides of the clamps 110 far from the concrete sample 210, and the tensile test devices are respectively connected with the two connecting members 120, so that the experimental device can apply tensile force to the clamps 110 at both ends of the concrete sample 210 through the connecting members 120. Because the both ends of concrete test piece 210 are inlayed respectively in anchor clamps 110, so the tensile force of the experimental apparatus that anchor clamps 110 received can pass through anchor clamps 110 even transmission to concrete test piece 210 on, the pulling force subsection that makes concrete test piece 210 receive is more even, and concrete test piece 210 passes through anchor clamps 110 transmission, the pulling force resultant force direction that receives is along concrete test piece 210's axial extension, make concrete test piece 210 can not appear the phenomenon of eccentric displacement in tensile process, and then improve the accuracy of concrete test piece 210 tensile test's data.

Optionally, the clamp comprises at least two clamping portions, and the at least two clamping portions are sequentially connected to form a closed ring to form the clamp (not shown in the drawings).

When the clamp is a detachable structure, the clamp can be arranged into a structure that at least two clamping parts are connected and assembled along the radial direction. During the use, assemble the clamping part around the tip of concrete sample to make the concrete sample can inlay and establish in the anchor clamps of assembling.

Set up anchor clamps into the dismantled and assembled structure of constituteing by two at least clamping parts, the tip that makes the concrete sample can be firm more easily inlays and establishes in anchor clamps, and the operation is more convenient.

Alternatively, two adjacent clamping portions are connected by bolts (not shown in the drawings).

The screw holes can be arranged at the corresponding positions of the assembled clamping parts to realize the connection of the clamping parts through bolts. Of course, during the actual use process, the bolt connection between the clamping portions can also be realized by other manners, and is not limited specifically here.

With passing through bolted connection between the clamping part to assemble into anchor clamps, make the assembling of anchor clamps more convenient, and convenient to detach reuse, it is more convenient to use, and utilizes long-term the use.

Optionally, as shown in fig. 2, a butting portion 111 is disposed on one side of the clamp 110, which is connected to the connecting member 120, and when the concrete specimen 210 is embedded between the two clamps 110, the connecting member 120 butts against one side of the butting portion 111, which is close to the concrete specimen 210.

The clamp 110 is provided with the abutting part 111, the connecting piece 120 abuts against one side, close to the concrete test piece 210, of the abutting part 111, the connecting piece 120 and the clamp 110 can be rapidly connected together through the structure, and the connecting piece 120 can effectively conduct the tensile force of the tensile test device to the clamp 110. Simple structure, and tensile conduction effect is relatively better.

Alternatively, as shown in fig. 3 and 2, the connecting member 120 includes a body 121 and a hook 122 connected to one side of the body 121, and the abutting portion 111 abuts against the hook 122.

Generally, in order to make the connection between the connecting member 120 and the clamp 110 relatively stable through the hook 122 and the abutting portion 111, the abutting portion 111 includes at least two portions symmetrically disposed on the clamp 110, and the hook 122 of the connecting member 120 is disposed corresponding to the abutting portion 111 of the clamp 110. Of course, the number of the abutting portions 111 and the hooks 122 may be set according to actual conditions.

The hook 122 abuts against the abutting portion 111, whereby the abutment of the connector 120 against the abutting portion 111 can be further stabilized.

Optionally, as shown in fig. 3, a connecting hole 1221 is provided on a side of the body 121 away from the hook 122 for connecting with a tensile testing apparatus.

Set up connecting hole 1221 in body 121 keeps away from one side of couple 122, be connected connecting piece 120 and tensile test device through this connecting hole 1221, because connecting hole 1221 sets up with couple 122 relatively, so the pulling force that connecting piece 120 received can be relatively evenly distributed to couple 122, and then makes pulling force can be relatively even conduct to anchor clamps 110, the eccentric phenomenon appears when further reduction concrete test piece 210 is tensile.

Optionally, as shown in fig. 4 and 2, the clamping device further includes a hanging portion 130, the hanging portion 130 is hung on the body 121 through a connecting hole 1221, and the connecting member 120 is connected to the tensile testing device through the hanging portion 130.

The hanging part 130 is matched with the connecting hole 1221 to connect the connecting part 120 to the tensile testing device, so that the connection between the connecting part 120 and the tensile testing device is firmer.

Optionally, as shown in fig. 1, a recessed portion 1110 is formed on a side of the abutting portion 111 abutting against the hook 122, and the hook 122 abuts against the recessed portion 1110.

A recessed portion 1110 is formed on the abutting portion 111, and the hook 122 abuts against the recessed portion 1110, so that a larger frictional force is generated when the hook 122 abuts against the abutting portion 111, thereby enhancing the stability of the abutment between the hook 122 and the abutting portion 111.

Alternatively, as shown in fig. 3, the hook 122 is formed with a projection 1220, and the projection 1220 abuts against the recess 1110.

Since the protrusion 1220 is formed on the hook 122 and the protrusion 1220 of the hook 122 is in contact with the recess 1110 of the abutting portion 111, the hook 122 can be restricted by the protrusion 1220 and the recess 1110 after being in contact with the abutting portion 111, thereby further enhancing the stability of the contact between the hook 122 and the abutting portion 111.

The utility model discloses on the other hand of embodiment provides a tensile test device, include: the clamping device comprises a stretching component and any one of the clamping devices, wherein the two ends of the stretching component are respectively stressed in the opposite directions in the same linear direction, and the two connecting pieces 120 of the clamping devices are respectively connected with the two opposite stress application ends of the stretching component.

The clamp 110 of the clamping device enables the tensile member of the tensile test device to be uniformly distributed on the test piece, the tensile force is reasonable, the axial extension of the test piece can be followed, the eccentric phenomenon of the test piece during the tensile test is reduced, and therefore the test data obtained when the tensile test device is used for performing the tensile test on the test piece is more accurate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a clamping device for centre gripping concrete sample, its characterized in that includes: the two ends of the concrete test piece are respectively embedded in the clamps, the clamps are tightly matched with the end parts of the concrete test piece, and the connecting pieces are respectively far away from the clamps and fixedly connected with one side of the concrete test piece and used for connecting a tensile test device.

2. The clamping device of claim 1, wherein the clamp comprises at least two clamping portions, and the at least two clamping portions are sequentially connected to form a closed ring to form the clamp.

3. The clamping device of claim 2, wherein adjacent two of said clamping portions are bolted together.

4. The clamping device as claimed in claim 1, wherein a butting portion is arranged on one side of the clamps connected with the connecting piece, and when the concrete sample is embedded between the two clamps, the connecting piece butts against one side of the butting portion close to the concrete sample.

5. The clamping device as claimed in claim 4, wherein said connecting member includes a body and a hook connected to one side of said body, said abutting portion abutting said hook.

6. Clamping device according to claim 5, characterized in that the side of the body remote from the hook is provided with a coupling hole for coupling with the tensile testing device.

7. The clamping device of claim 6, further comprising a hanging portion, wherein the hanging portion is hung on the body through the connecting hole, and the connecting member is connected with the tensile testing device through the hanging portion.

8. The clamping device as claimed in claim 6, wherein a recess is formed on one side of the abutting portion abutting against the hook, and the hook abuts against the recess.

9. The clip-on device of claim 8, in which the hook is formed with a projection which abuts the recess.

10. A tensile testing apparatus, comprising a tensile member having opposite force applied to both ends thereof in the same linear direction, and the holding apparatus according to any one of claims 1 to 9, wherein the two connecting members of the holding apparatus are connected to the opposite force applied ends of the tensile member, respectively.