A concrete flexural tensile strength test scribing device

Abstract

The utility model belongs to the technical field of concrete test piece ruling, concretely relates to a kind of concrete flexural tensile strength test ruling device;Including clamping positioning system and line printing and dyeing system;Clamping positioning system includes telescopic link, support shell, central bearing gear, clamping spring and clamping baffle;Two telescopic links are reversely installed on support shell slidably, and the rack on the two telescopic links is all engaged with the central bearing gear on support shell;The outside end of telescopic link is equipped with clamping baffle, and clamping spring is connected between telescopic link and support shell;Line printing and dyeing system includes printing plate and pressing assembly, printing plate is located the bottom surface of support shell, pressing assembly is installed on support shell and is connected with printing plate, and pressing assembly is with support shell as support and moves printing plate;A kind of concrete flexural tensile strength test ruling device of the utility model can quickly and accurately draw line of loading point and support point position, improve the standardization of concrete flexural tensile strength test process and the accuracy of result.

Description

Technical Field

[0001] This utility model belongs to the field of concrete specimen marking technology, specifically relating to a marking device for concrete flexural tensile strength testing. Background Technology

[0002] The concrete flexural tensile strength test is mainly used to test the flexural or bending strength of concrete itself. Existing methods for testing concrete flexural tensile strength employ a two-point loading and three-point free support test apparatus. The loading point is located 75 mm from the center of the concrete specimen at each end, and the support point is located 225 mm from the center of the specimen at each end. The loading and support points are symmetrical sides of the concrete specimen. Before the test, the corresponding loading and support points need to be marked to ensure accuracy and reliability of the test results. Currently, specimen marking is done manually, which is inefficient and the accuracy varies from person to person, potentially affecting the accuracy of the test results. Therefore, a concrete flexural tensile strength test marking device is proposed to address these issues. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a marking device for concrete flexural tensile strength test, which replaces manual measurement and marking, and improves the standardization of the concrete flexural tensile strength test process and the accuracy of the results.

[0004] This utility model provides the following technical solution: a marking device for testing the flexural strength of concrete, comprising a clamping and positioning system and a line printing system;

[0005] The clamping and positioning system includes telescopic rods, a support shell, a central bearing gear, a clamping spring, and a clamping baffle. Two telescopic rods are slidably mounted in opposite directions on the support shell, and the racks on both telescopic rods mesh with the central bearing gear on the support shell. A clamping baffle is installed on the outer end of the telescopic rod, and a clamping spring connects the telescopic rod and the support shell. The clamping spring pulls the telescopic rod to keep the two clamping baffles clamped together.

[0006] The line printing system includes a printing plate and a pressing assembly. The printing plate is located on the bottom surface of the support shell, and the pressing assembly is installed on the support shell and connected to the printing plate. The pressing assembly presses the printing plate with the support shell as support.

[0007] Furthermore, a guide rail is provided on the top surface of the support shell, and the telescopic rod is slidably mounted on the guide rail.

[0008] Furthermore, the telescopic rod slides with the guide rail via rollers at the bottom, and the top of the support shell is covered with an outer shell, which restricts the vertical movement of the guide rail.

[0009] Furthermore, a connector is installed on the outer end of the telescopic rod, and the clamping baffle is movably inserted into the connector. A tightening bolt is connected to the connector, and the end of the tightening bolt abuts against the clamping baffle to fix it in place.

[0010] Furthermore, a scale is provided on the connector, and the length scale line of the scale is parallel to the telescopic rod.

[0011] Furthermore, the pressing assembly includes a pressing handle, a retraction spring, and guide posts; two guide posts slide through the support shell, with the top of the two guide posts connected to the pressing handle and the bottom connected to the printing plate, and the retraction spring sleeved on the guide posts, with one end of the retraction spring supporting the guide post and the other end supporting the support shell.

[0012] Furthermore, the printing plate has four parallel printing strips, with the middle two printing strips corresponding to the loading points and the outer two printing strips corresponding to the support points.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model provides a marking device for testing the flexural tensile strength of concrete, which mainly consists of two parts: a clamping and positioning system and a line marking system. The clamping and positioning system includes two synchronous telescopic rods, a clamping spring, and a clamping baffle. The two synchronous telescopic rods are stretched and retracted synchronously and at the same distance in the guide rail by the rotation of the central bearing gear. After the clamping baffle and telescopic rods are stretched outward, the spring's retraction force can place the central bearing in the positioning system at the center of the specimen, thereby achieving the central symmetry of the entire system. In addition, the clamping baffle is equipped with a scale to check whether the device clamps symmetrically. The baffle is fixed and loosened with bolts, allowing it to move up and down. When in use, the baffle is moved down, and after use, it is moved up for easy storage of the entire device. The line printing system includes a printing plate and a pressing assembly. The printing plate has four printing strips, with the two middle strips corresponding to the loading points and the two outer strips corresponding to the support points. The pressing assembly includes a pressing handle, a retraction spring, and a support shell. After pressing with the handle, the printing plate moves downward and extends out of the support shell. After stopping the pressing, the spring can lift the printing plate and retract it into the support shell.

[0015] This utility model discloses a marking device for concrete flexural tensile strength testing, which can quickly and accurately draw lines indicating the positions of loading points and support points, thereby improving the standardization of the concrete flexural tensile strength testing process and the accuracy of the results. Attached Figure Description

[0016] Figure 1 A schematic diagram of a marking device for testing the flexural tensile strength of concrete.

[0017] Figure 2 This is a schematic diagram of the clamping and positioning system;

[0018] Figure 3 An exploded schematic diagram of a marking device for testing the flexural strength of concrete.

[0019] Figure 4 A bottom view of a marking device for testing the flexural strength of concrete;

[0020] Figure 5 This is a diagram showing the marking effect of a marking device for testing the flexural strength of concrete.

[0021] In the diagram: 1-Telescopic rod; 1.1-Rack; 2-Support shell; 3-Central bearing gear; 4-Clamping spring; 5-Clamping baffle; 6-Printing plate; 6.1-Printing strip; 7-Guide rail; 8-Outer shell; 9-Plug-in socket; 10-Tightening bolt; 11-Scale; 12-Press handle; 13-Return spring; 14-Guide post; 15-Concrete specimen; 16-Line. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] like Figure 1 , Figure 2 , Figure 3 As shown: A marking device for testing the flexural tensile strength of concrete, including a clamping and positioning system and a line marking system;

[0024] The clamping and positioning system includes a telescopic rod 1, a support shell 2, a central bearing gear 3, a clamping spring 4, and a clamping baffle 5. The two telescopic rods 1 are slidably mounted on the support shell 2 in opposite directions. The racks 1.1 on the two telescopic rods 1 mesh with the central bearing gear 3 on the support shell 2. The outer ends of the telescopic rods 1 are equipped with clamping baffles 5. The clamping spring 4 connects the telescopic rods 1 and the support shell 2. The clamping spring 4 pulls the telescopic rods 1 to keep the two clamping baffles 5 clamped together.

[0025] The top surface of the support shell 2 is provided with a guide rail 7, and the telescopic rod 1 is slidably mounted on the guide rail 7. The two telescopic rods 1 are stretched and retracted synchronously and at the same distance in the guide rail 7 by the rotation of the central bearing gear 3. After the clamping baffle 5 and the telescopic rod 1 are stretched outward, the central bearing gear 3 in the clamping positioning system can be placed at the center of the specimen by the retraction force of the clamping spring 4, thereby achieving the central symmetry of the entire system.

[0026] The line printing system includes a printing plate 6 and a pressing assembly. The printing plate 6 is located on the bottom surface of the support shell 2. The pressing assembly is installed on the support shell 2 and connected to the printing plate 6. The pressing assembly presses the printing plate 6 with the support shell 2 as support.

[0027] The telescopic rod 1 slides with the guide rail 7 via rollers at the bottom. The top of the support shell 2 is covered by the outer shell 8, which restricts the vertical movement of the guide rail 7.

[0028] A connector 9 is installed on the outer end of the telescopic rod 1. The clamping baffle 5 is movably inserted into the connector 9. A tightening bolt 10 is connected to the connector 9. The end of the tightening bolt 10 abuts against the clamping baffle 5 to fix it in place. The clamping baffle 5 is tightened and loosened by the tightening bolt 10, allowing the clamping baffle 5 to move up and down. When in use, the clamping baffle 5 is moved down, and when not in use, it is moved up, making it easy to store the entire device.

[0029] A scale 11 is provided on the connector 9. The length scale line of the scale 11 is parallel to the telescopic rod 1. The scale 11 is used to check whether the clamping and positioning system clamps symmetrically.

[0030] The pressing assembly includes a pressing handle 12, a return spring 13, and guide posts 14. Two guide posts 14 slidably pass through the support shell 2. The top of each guide post 14 is connected to the pressing handle 12, and the bottom is connected to the printing plate 6. The return spring 13 is fitted onto the guide posts 14, with one end supporting the guide post 14 and the other end supporting the support shell 2. After pressing with the pressing handle 12, the printing plate 6 moves downwards and extends out of the support shell 2. After pressing stops, the return spring 13 can lift the printing plate 6 and retract it into the support shell 2.

[0031] like Figure 4 As shown: The printing plate 6 has four parallel printing strips 6.1. The width of the printing strips 6.1 is 2mm. The middle two printing strips 6.1 are spaced 150mm apart at their corresponding loading points, and the outer two printing strips 6.1 are spaced 450mm apart at their corresponding support points.

[0032] like Figure 5 The method of using a marking device for concrete flexural tensile strength testing is as follows: Apply ink evenly and gently to the four ink strips 6.1 on the marking plate 6 using a small brush (one application of ink allows for multiple markings). Place the marking device on the side of the concrete flexural tensile strength specimen. Clamping baffles 5 at both ends of the specimen clamp the two ends of the specimen. Then, gently press down on the pressing handle 12 to complete the marking on one side. Flip the specimen 180 degrees and repeat the above steps to mark the loading and support points of the concrete flexural tensile strength specimen. This device can quickly and accurately draw the lines indicating the loading and support points, improving the standardization of the concrete flexural tensile strength testing process and the accuracy of the results.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A marking device for testing the flexural tensile strength of concrete, characterized in that: Including a clamping and positioning system and a line printing system; The clamping and positioning system includes a telescopic rod (1), a support shell (2), a central bearing gear (3), a clamping spring (4), and a clamping baffle (5); two telescopic rods (1) are slidably mounted on the support shell (2) in opposite directions, and the racks (1.1) on the two telescopic rods (1) mesh with the central bearing gear (3) on the support shell (2); a clamping baffle (5) is installed on the outer end of the telescopic rod (1), and a clamping spring (4) is connected between the telescopic rod (1) and the support shell (2). The clamping spring (4) pulls the telescopic rod (1) to keep the two clamping baffles (5) clamped together. The line printing system includes a printing plate (6) and a pressing assembly. The printing plate (6) is located on the bottom surface of the support shell (2). The pressing assembly is installed on the support shell (2) and connected to the printing plate (6). The pressing assembly presses the printing plate (6) with the support shell (2) as support.

2. The marking device for testing the flexural tensile strength of concrete according to claim 1, characterized in that: The top surface of the support shell (2) is provided with a guide rail (7), and the telescopic rod (1) is slidably assembled on the guide rail (7).

3. The marking device for testing the flexural tensile strength of concrete according to claim 2, characterized in that: The telescopic rod (1) slides with the guide rail (7) through the bottom roller, and the top of the support shell (2) is covered with a shell (8), which restricts the guide rail (7) from jumping up and down.

4. A marking device for testing the flexural tensile strength of concrete according to any one of claims 1 to 3, characterized in that: The telescopic rod (1) is equipped with a plug-in seat (9) on its outer end. The clamping baffle (5) is movably inserted into the plug-in seat (9). A tightening bolt (10) is connected to the plug-in seat (9). The end of the tightening bolt (10) abuts against the clamping baffle (5) to fix it.

5. The marking device for testing the flexural tensile strength of concrete according to claim 4, characterized in that: The plug-in socket (9) is provided with a scale (11), and the length scale line of the scale (11) is parallel to the telescopic rod (1).

6. The marking device for testing the flexural tensile strength of concrete according to claim 1, characterized in that: The pressing assembly includes a pressing handle (12), a retraction spring (13), and guide posts (14); the two guide posts (14) slide through the support shell (2), the top of the two guide posts (14) is connected to the pressing handle (12), the bottom is connected to the printing plate (6), the retraction spring (13) is sleeved on the guide post (14), one end of the retraction spring (13) supports the guide post (14), and the other end supports the support shell (2).

7. The marking device for testing the flexural tensile strength of concrete according to claim 1, characterized in that: The printing plate (6) is provided with four parallel printing strips (6.1), with the middle two printing strips (6.1) corresponding to the loading point positions and the outer two printing strips (6.1) corresponding to the support point positions.

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