Tension and compression strength testing device for concrete member

Abstract

The utility model relates to the technical field of concrete strength detection, in particular to a tension and compression strength testing device of a concrete member, which comprises a connecting frame, a centering mechanism arranged on the connecting frame, and a first cushion block, a first filler strip, a second cushion block, a second filler strip and a base plate arranged on the connecting frame, supporting pieces are hinged to the two sides of the connecting frame, and a limiting sliding groove and a connecting sliding groove are formed in the connecting frame; the centering mechanism comprises a connecting base, a fixing bolt is arranged on one side of the connecting base, a trigger frame is hinged to the top of the connecting base, and a first connecting rod is slidably connected to the trigger frame. The concrete test block centering device has the beneficial effects that when a concrete test block is placed, the centering mechanism is driven by the gravity of the concrete test block to center the concrete test block, so that centering errors are avoided, and the detection precision is improved; meanwhile, the test effect of the concrete test block is prevented from being influenced by the force applied to the concrete test block by the contact piece in the horizontal direction, so that the detection precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete strength detection, in particular to a tensile and compressive strength testing device for concrete components. Background Art

[0002] When testing the tensile strength of concrete components, the splitting test method is often used. A cubic or cylindrical specimen is used. A pad is added between the upper and lower supporting surfaces of the specimen and the press platen to form corresponding strip loads on the upper and lower parts of the specimen, causing splitting failure of the specimen along the center of the cube or the diameter of the cylinder. The force value during splitting can be converted to obtain the axial tensile strength of the concrete.

[0003] According to the National Standard of the People's Republic of China (Standard for Test Methods of Physical and Mechanical Properties of Concrete GB / T 50081-2019), the splitting test requires the installation of pads between the specimen and the steel arc pad, and the pads cannot be reused. Each group of specimens in the splitting test consists of three pieces.

[0004] An asphalt concrete splitting test fixture disclosed in Chinese patent CN214668175U includes: a mounting frame, a limiting plate, a first pad, a second pad, a clamping mechanism, a fixing plate and a rubber sleeve; four columns are vertically arranged on the bottom wall of the mounting frame, the second pad is fixed at the center of the bottom wall of the mounting frame, a limiting hole matching the column is opened on the limiting plate, the first pad is fixedly arranged at the lower end of the limiting plate, the axes of the first pad and the second pad are arranged parallel, the first pad and the second pad have arc surfaces, and are arranged opposite to each other.

[0005] However, the splitting test fixture still has the following problems during actual use:

[0006] Since the splitting test requires a pad between the specimen and the steel arc pad, and the pad cannot be reused, and each group of specimens in the splitting test consists of three pieces, the pad also needs to be replaced when the specimen is replaced. In addition, since the contact surface between the pad and the pad is arc-shaped, and the splitting test requires splitting and destruction along the center of the cubic specimen or the diameter section of the cylindrical specimen, it is difficult to align the specimen when replacing the specimen, and there is a centering error, which will affect the detection accuracy. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a tensile and compressive strength testing device for concrete components.

[0008] The purpose of the utility model is achieved by the following technical solutions: A tensile and compressive strength testing device for a concrete member comprises a connecting frame, a centering mechanism is arranged on the connecting frame, a first cushion block, a first cushion strip, a second cushion block, a second cushion strip and a cushion plate are arranged on the connecting frame;

[0009] Support members are hinged on both sides of the connecting frame, and a limited sliding groove and a connecting sliding groove are provided on the connecting frame;

[0010] The centering mechanism includes a connecting seat, a fixing bolt is provided on one side of the connecting seat, a trigger frame is hinged on the top of the connecting seat, a first connecting rod is slidably connected to the trigger frame, a limiting block is provided at one end of the first connecting rod, a contact piece is fixedly connected to the end of the first connecting rod away from the limiting block, a first elastic piece is provided between the contact piece and the trigger frame, a second connecting rod is fixedly connected to one side of the trigger frame, the second connecting rod is slidably connected to the connecting seat, and a second elastic piece is provided between the trigger frame and the connecting seat.

[0011] Preferably, the first pad is located above the centering mechanism, the first pad strip is overlapped on the top of the first pad, the second pad is located above the first pad, the second pad strip is located at the bottom of the second pad, and the pad plate is overlapped on the top of the second pad. When in use, the concrete test block to be tested is set between the first pad strip and the second pad strip.

[0012] Preferably, the first cushion block and the second cushion block are both provided with sliding blocks adapted to the limiting sliding groove, and the first cushion strip and the second cushion strip are both provided in the limiting sliding groove.

[0013] Preferably, the fixing bolt is arranged inside the connecting slide groove.

[0014] Preferably, there are two trigger racks, which are symmetrically distributed on both sides of the top of the connecting seat.

[0015] Preferably, the middle portion of the trigger frame is hinged to the bottom of the connecting seat.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The tensile and compressive strength testing device for concrete components, when placing a concrete test block, uses the gravity of the concrete test block itself to drive a centering mechanism to center the concrete test block, thereby avoiding centering errors and improving the detection accuracy; at the same time, it avoids the influence of the horizontal force exerted by the contact piece on the concrete test block on the test effect of the concrete test block, thereby further improving the detection accuracy.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of the first state when the utility model detects a cylindrical test piece;

[0021] Figure 2 This is a schematic diagram of the structure of the first state when the utility model detects a cubic specimen;

[0022] Figure 3 It is a schematic diagram of the split structure when the utility model detects a cylindrical specimen;

[0023] Figure 4 It is a structural schematic diagram of the second state when the utility model detects a cylindrical test piece;

[0024] Figure 5 This is a structural schematic diagram of the connecting frame of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the centering mechanism of the utility model;

[0026] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at point A in the middle.

[0027] In the figure: 1. connecting frame; 101. supporting member; 102. limiting slide; 103. connecting slide; 2. centering mechanism; 201. connecting seat; 202. fixing bolt; 203. trigger frame; 204. first connecting rod; 205. limiting block; 206. contact member; 207. first elastic member; 208. second connecting rod; 209. second elastic member; 3. first cushion block; 4. first cushion strip; 5. second cushion block; 6. second cushion strip; 7. cushion plate. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] Additional aspects and advantages of the present invention will be further described below in conjunction with the accompanying drawings, and some will become apparent from the following description or be learned through practice of the present invention.

[0030] like Figures 1 to 4 As shown, a tensile and compressive strength testing device for a concrete member comprises a connecting frame 1, on which a centering mechanism 2 is arranged, on which a first pad 3, a first pad strip 4, a second pad 5, a second pad strip 6 and a pad plate 7 are arranged, the first pad 3 is located above the centering mechanism 2, the first pad strip 4 is overlapped on the top of the first pad 3, the second pad 5 is located above the first pad 3, the second pad strip 6 is located at the bottom of the second pad 5, and the pad plate 7 is overlapped on the top of the second pad 5. When in use, the test block to be tested is arranged between the first pad strip 4 and the second pad strip 6.

[0031] like Figures 1 to 5 As shown, support members 101 are hinged on both sides of the connecting frame 1, a limiting slide groove 102 and a connecting slide groove 103 are provided on the connecting frame 1, sliders adapted to the limiting slide groove 102 are provided on the first cushion block 3 and the second cushion block 5, and the first cushion strip 4 and the second cushion strip 6 are both arranged in the limiting slide groove 102.

[0032] like Figure 2 , Figures 4 to 7 As shown, the centering mechanism 2 includes a connecting seat 201, a fixing bolt 202, a trigger frame 203, a first connecting rod 204, a limit block 205, a contact member 206, a first elastic member 207, a second connecting rod 208 and a second elastic member 209. A fixing bolt 202 is provided on one side of the connecting seat 201, and the fixing bolt 202 is provided inside the connecting slide groove 103. The top of the connecting seat 201 is hinged with a trigger frame 203. The number of the trigger frames 203 is two, which are symmetrically distributed on both sides of the top of the connecting seat 201. The middle part of the trigger frame 203 is hinged. Connected to the bottom of the connecting seat 201, a first connecting rod 204 is slidably connected to the trigger frame 203, a limiting block 205 is set at one end of the first connecting rod 204, a contact piece 206 is fixedly connected to the end of the first connecting rod 204 away from the limiting block 205, a first elastic piece 207 is set between the contact piece 206 and the trigger frame 203, a second connecting rod 208 is fixedly connected to one side of the trigger frame 203, the second connecting rod 208 is slidably connected to the connecting seat 201, and a second elastic piece 209 is set between the trigger frame 203 and the connecting seat 201.

[0033] The working process is as follows:

[0034] S1. When in use, first rotate the support member 101 so that the support member 101 is in a vertical state to support the connection seat 201, and tighten the fixing bolt 202 to fix the position of the connection seat 201;

[0035] S2, then sequentially place the first cushion block 3 and the first cushion strip 4 on the centering mechanism 2 through the limiting slide groove 102, place the concrete test block to be tested on the first cushion strip 4, then sequentially place the second cushion strip 6 and the second cushion block 5 through the limiting slide groove 102 on the concrete test block to be tested, and then place the pad 7 on the second cushion block 5;

[0036] S3, due to the gravity of the first cushion block 3, the concrete test block, the second cushion block 5 and the cushion plate 7, the trigger frame 203 is pressed to rotate, the second elastic member 209 is stretched, the trigger frame 203 drives the first connecting rod 204 to move, and the first connecting rod 204 drives the contact member 206 to move, so that the contact member 206 is against the surface of the concrete test block;

[0037] S4, the trigger frames 203 symmetrically distributed on both sides of the top of the connecting seat 201 rotate simultaneously, driving the contact member 206 to press against the concrete test block, and centering the concrete test block to avoid centering errors, thereby improving the detection accuracy;

[0038] S5. After the alignment is completed, the support member 101 is rotated so that the support member 101 is in a horizontal state, the support for the connecting seat 201 is released, and the fixing bolts 202 are loosened to release the fixing of the connecting seat 201;

[0039] S6, the connecting seat 201 moves downward to the middle of the connecting frame 1, the second elastic member 209 rebounds, driving the trigger frame 203 to rotate and reset, the first elastic member 207 rebounds, driving the contact member 206 to rotate and reset, and the first cushion block 3 is stuck at the bottom of the limiting slide groove 102 to support the concrete test block;

[0040] S7. At this time, the output end of the pressure testing machine is pressed down on the pad 7 to test the tensile strength of the concrete test block, avoiding the influence of the horizontal force applied by the contact member 206 on the test block on the test block, thereby further improving the detection accuracy.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A tensile and compressive strength testing device for concrete components, characterized in that: It comprises a connecting frame (1), the connecting frame (1) is provided with a centering mechanism (2), the connecting frame (1) is provided with a first cushion block (3), a first cushion strip (4), a second cushion block (5), a second cushion strip (6) and a cushion plate (7); Support members (101) are hingedly connected to both sides of the connecting frame (1), and a limiting slide groove (102) and a connecting slide groove (103) are provided on the connecting frame (1); The centering mechanism (2) comprises a connecting seat (201), a fixing bolt (202) is provided on one side of the connecting seat (201), a trigger frame (203) is hinged on the top of the connecting seat (201), a first connecting rod (204) is slidably connected to the trigger frame (203), a limit block (205) is provided at one end of the first connecting rod (204), a contact piece (206) is fixedly connected to the end of the first connecting rod (204) away from the limit block (205), a first elastic piece (207) is provided between the contact piece (206) and the trigger frame (203), a second connecting rod (208) is fixedly connected to one side of the trigger frame (203), the second connecting rod (208) is slidably connected to the connecting seat (201), and a second elastic piece (209) is provided between the trigger frame (203) and the connecting seat (201).

2. A tensile and compressive strength testing device for concrete components according to claim 1, characterized in that: The first pad (3) is located above the centering mechanism (2), the first pad strip (4) is overlapped on the top of the first pad (3), the second pad (5) is located above the first pad (3), the second pad strip (6) is located at the bottom of the second pad (5), and the pad (7) is overlapped on the top of the second pad (5). When in use, the concrete test block to be tested is set between the first pad strip (4) and the second pad strip (6).

3. The tensile and compressive strength testing device for concrete components according to claim 1, characterized in that: The first cushion block (3) and the second cushion block (5) are both provided with a sliding block adapted to the limiting sliding groove (102), and the first cushion strip (4) and the second cushion strip (6) are both provided in the limiting sliding groove (102).

4. The tensile and compressive strength testing device for concrete components according to claim 1, characterized in that: The fixing bolt (202) is arranged inside the connecting sliding groove (103).

5. The tensile and compressive strength testing device for concrete components according to claim 1, characterized in that: There are two trigger frames (203) symmetrically distributed on both sides of the top of the connecting seat (201).

6. The tensile and compressive strength testing device for concrete components according to claim 1, characterized in that: The middle portion of the trigger frame (203) is hinged to the bottom of the connecting seat (201).

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