CN209841554U - Auxiliary device for detecting tensile strength of steel concrete - Google Patents

Abstract

The utility model discloses an auxiliary device for testing the tensile strength of steel-concrete concrete, which comprises a slide rail, a base, a splint and a pad. The bottom is provided with a control panel, and the inside of the control panel is provided with a single-chip microcomputer, and the two ends of the inner top of the base are respectively equipped with a first threaded rod and a second threaded rod, and one end of the second threaded rod and the first threaded rod are both It is connected with one end of the shaft of the servo motor through the second pulley mechanism. The utility model is provided with a pad, and the top of the pad is arc-shaped, so when the arc surface contacts the plane of the bottom end of the concrete specimen, the position of the joint between the two is in linear contact, and the pad The arc top of the platform is aligned with the center line of the bottom surface of the concrete specimen, so as to ensure that the force of the concrete specimen is at its center, thereby reducing the test error and improving the accuracy of the test.

Description

An auxiliary device for testing the tensile strength of steel-concrete concrete

technical field

The utility model relates to the technical field of auxiliary devices for concrete testing, in particular to an auxiliary device for testing tensile strength of steel-concrete concrete.

Background technique

The tensile performance of concrete is one of its basic mechanical properties. At present, it is difficult to directly measure the axial tensile performance of concrete, and the test data is relatively discrete. Therefore, the tensile test is generally carried out on concrete cube test blocks, but the existing There are many problems or defects in the auxiliary device for testing the tensile strength of steel-concrete concrete:

First, the traditional auxiliary device for testing the tensile strength of steel-concrete concrete generally uses pads to perform the tensile test of the cube test block. During the test, it is necessary to draw parallel lines on the top and bottom surfaces of the formed concrete test block to determine the split The position of the cracked surface, manual marking on the test piece is both troublesome and has the influence of human factors, which affects the accuracy of the marking, and in the follow-up operation process, it is necessary to manually place the gasket to align with the marking line. Therefore, splitting The position of the crack surface is often not guaranteed to be in the center of the specimen, thus affecting the accuracy of the test;

Second, when the traditional auxiliary device for testing the tensile strength of steel-concrete concrete needs to cut the concrete test block, two pads should be placed on a flat backing plate, and the concrete test block is sandwiched between the two pads. However, when the concrete block is cut from the middle, the pads will be offset, which is not easy to operate, which seriously affects the reliability of the split tensile strength value, reduces work efficiency, and consumes time and energy;

Third, when the motor of the traditional auxiliary device for tensile strength testing of steel-concrete concrete drives the movable plate to move, it is easy to collide with the notch, and the threads between them are deformed under the action of force and are stuck. Frequent maintenance has seriously affected work efficiency.

Utility model content

The purpose of this utility model is to provide an auxiliary device for testing the tensile strength of steel-concrete concrete, so as to solve the problems of inconvenient positioning, easy offset and easy jamming of pads proposed in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: an auxiliary device for testing the tensile strength of steel-concrete concrete, including a slide rail, a base, a splint and a pad, and both sides of the inner bottom of the base are provided with Servo motor, while the bottom of one end of the base is provided with a control panel, and the inside of the control panel is provided with a single-chip microcomputer, the two ends of the inner top of the base are respectively equipped with a first threaded rod and a second threaded rod, and the second threaded rod and one end of the first threaded rod are connected to one end of the servo motor shaft through the second pulley mechanism, and the first threaded rod and the second threaded rod are connected through the first pulley mechanism, while the first threaded rod and the second threaded rod The other end of the rod is provided with a shaft sleeve, both sides of the first threaded rod and the second threaded rod are provided with movable plates, both sides of the inner top of the base are provided with partitions, and the two sides of the partitions Both ends are provided with photosensitive sensors, both sides of the top of the base are provided with rectangular slots, and at the same time, the top of the movable plate passes through the rectangular slots and is fixed with slide rails, and the tops of the slide rails are all fixed with sliders. The top of the block is fixed with a linkage bracket, and both ends of the linkage bracket are fixed with a splint, the bottom of the splint is equipped with a miniature oil cylinder, and one end of the expansion rod of the miniature oil cylinder is connected with the bottom end of the linkage bracket. The output ends of the panel and the light sensor are both electrically connected to the input ends of the single-chip microcomputer through wires, and the output ends of the single-chip microcomputer are respectively electrically connected to the input ends of the miniature oil cylinder and the servo motor through wires.

Preferably, shock-absorbing rubber pads are provided at the four corners of the bottom end of the base, and the shock-absorbing rubber pads and the base are welded and integrated.

Preferably, a pad is installed in the middle of the top of the base, and the pad and the base are in a detachable installation structure.

Preferably, a limit block is provided at the bottom of the movable plate, and a limit slot cooperating with the limit block is provided at the top inside the base, and a sliding structure is formed between the limit slot and the limit block.

Preferably, internal threads are provided on the inner side wall of the movable plate, and the surfaces of the first threaded rod and the second threaded rod are provided with external threads that cooperate with the internal threads.

Preferably, the first threaded rods and the second threaded rods are distributed symmetrically with respect to the center line of the base.

Compared with the prior art, the beneficial effect of the utility model is that the auxiliary device for testing the tensile strength of steel-concrete concrete has a reasonable structure and has the following advantages:

1. By setting up a pad, and the top of the pad is arc-shaped, so when the surface of the arc is in contact with the plane at the bottom of the concrete specimen, the position of the joint between the two is in linear contact, and the pad The arc top of the arc is aligned with the center line of the bottom surface of the concrete specimen, so as to ensure that the force of the concrete specimen is at its center, thereby reducing the test error and improving the accuracy of the test.

2. With splints installed, since the splints are connected by linkage brackets, the miniature oil cylinder drives the splints to expand to both sides after starting, which is convenient for fixing the concrete specimen. At the same time, the slide rail is fixed on the top of the movable plate. After the servo motor starts Drive the first threaded rod and the second threaded rod to rotate, and the movable plate moves to both sides under the action of the first threaded rod and the second threaded rod, which is convenient to adjust the distance between the splints, due to the relative support of the splints to the concrete specimen , to ensure the stability and balance of the concrete specimens under compression, to ensure the accuracy of the test results, and to have wide applicability.

3. By installing a light sensor, when the movable plate is about to touch the edge of the rectangular groove, the light sensor sends a message to the single-chip microcomputer, so that the servo motor stops working immediately, avoiding the contact between the movable plate and the edge of the rectangular groove, and preventing the rectangular groove from contacting the edge of the rectangular groove. Stuck between movable boards.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the utility model;

Fig. 2 is the top view sectional structure schematic diagram of the utility model;

Fig. 3 is the side view sectional structure schematic diagram of splint of the present utility model;

Fig. 4 is a system block diagram of the utility model.

In the figure: 1. slider; 2. miniature oil cylinder; 3. slide rail; 4. first pulley mechanism; 5. base; 6. second pulley mechanism; 7. servo motor; 8. limit slot; 9. Control panel; 10. Single-chip microcomputer; 11. Limiting block; 12. Shock-absorbing rubber pad; 13. Partition; 14. Light sensor; 15. Rectangular slot; 19. The first threaded rod; 20. The second threaded rod; 21. The shaft sleeve; 22. The linkage bracket.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1-4, an embodiment provided by the utility model: an auxiliary device for testing the tensile strength of steel-concrete concrete, including a slide rail 3, a base 5, a splint 17 and a pad 18, and the bottom of the base 5 The four corners of the end are all provided with shock-absorbing rubber pads 12, and there is a welded integrated structure between the shock-absorbing rubber pads 12 and the base 5, so that the setting plays a shock-absorbing effect, and both sides of the inner bottom of the base 5 are Servomotor 7 is provided, and the model of servomotor 7 can be LC08ABK00, and the bottom of one end of base 5 is provided with control panel 9 simultaneously, and the inside of control panel 9 is provided with single-chip microcomputer 10, and the model of single-chip microcomputer 10 can be HT66F018, and base 5 The first threaded rod 19 and the second threaded rod 20 are respectively installed at the two ends of the inner top, and one end of the second threaded rod 20 and the first threaded rod 19 is connected with one end of the rotating shaft of the servo motor 7 through the second pulley mechanism 6, The first threaded rod 19 and the second threaded rod 20 are connected by the first pulley mechanism 4, while the other ends of the first threaded rod 19 and the second threaded rod 20 are all provided with axle sleeves 21, and the first threaded rod 19 and the second threaded rod 20 are connected with each other. Between the two threaded rods 20, it is symmetrically distributed about the center line of the base 5, so that the operation is more stable, and both sides of the first threaded rod 19 and the second threaded rod 20 are provided with a movable plate 16, and the inboard of the movable plate 16 The wall is provided with internal threads, and the surfaces of the first threaded rod 19 and the second threaded rod 20 are all provided with external threads that cooperate with the internal threads, so that the distance between the adjustable movable plates 16 is convenient to adjust, and the inner top of the base 5 Both sides are provided with a partition 13, and both ends of the partition 13 are provided with a light sensor 14, the model of the light sensor 14 can be ALS-PDT144-6C/L451, and the bottom of the movable plate 16 is provided with a limit block 11. At the same time, the top inside the base 5 is provided with a limit groove 8 that cooperates with the limit block 11, and the space between the limit groove 8 and the limit block 11 is a sliding structure, so that the setting plays the role of limit, basically Both sides of seat 5 top are all provided with rectangular groove 15, and the top of movable plate 16 passes through rectangular groove 15 and all is fixed with slide rail 3 simultaneously, and the top of slide rail 3 is all fixed with slide block 1, and the top of slide block 1 is all fixed. Linkage support 22 is arranged, and the two ends of linkage support 22 are all fixed with splint 17, and the bottom end of splint 17 is all equipped with miniature oil cylinder 2, and the model of miniature oil cylinder 2 can be CX-SD-32, and the extension rod of miniature oil cylinder 2 One end is connected with the bottom end of the linkage bracket 22, and a pad 18 is installed at the middle position of the top of the base 5, and between the pad 18 and the base 5 is a disassembly and installation structure, so that it is convenient to replace the pad 18, and the control panel 9 The output end of the light sensor 14 is electrically connected with the input end of the single-chip microcomputer 10 through wires, and the output end of the single-chip microcomputer 10 is electrically connected with the input end of the micro cylinder 2 and the servo motor 7 through wires.

Working principle: when in use, first turn on the power supply, and use the first pulley mechanism 4 and the second pulley mechanism 6 to drive the first threaded rod 19 and the second threaded rod 20 to rotate after the servo motor 7 is started, and the movable plate 16 is in the first Move to both sides under the effect of threaded rod 19 and the second threaded rod 20, adjust the spacing between clamping plate 17, when movable plate 16 will touch the edge of rectangular groove 15, photosensitive sensor 14 sends information to single-chip microcomputer 10, makes Servomotor 7 stops working immediately, avoids movable plate 16 and the edge contact of rectangular groove 15, prevents from being stuck between rectangular groove 15 and movable plate 16, then concrete specimen is placed on the top of pad 18, starts servomotor 7, The servo motor 7 drives the slide rails 3 to close each other, so that the splint 17 fixes the concrete specimen on the top of the pad 18, and starts the miniature oil cylinder 2. Since the splints 17 are connected by the linkage bracket 22, the miniature oil cylinder 2 drives the splint 17 after starting. Expanding to both sides, it is convenient to fix the concrete specimen. The device has simple structure, convenient operation and wide application range.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. Auxiliary device for steel-concrete tensile strength detection, comprising slide rail (3), base (5), splint (17) and pad (18), it is characterized in that: described base (5) Both sides of the inner bottom end are provided with servo motors (7), while the bottom at one end of the base (5) is provided with a control panel (9), and the inside of the control panel (9) is provided with a single-chip microcomputer (10), the base (5) The first threaded rod (19) and the second threaded rod (20) are installed on the two ends of the inner top respectively, and one end of the second threaded rod (20) and the first threaded rod (19) pass through the second pulley The mechanism (6) is connected with one end of the rotating shaft of the servo motor (7), and the first threaded rod (19) is connected with the second threaded rod (20) through the first pulley mechanism (4), while the first threaded rod ( 19) and the other end of the second threaded rod (20) are provided with a shaft sleeve (21), and both sides of the first threaded rod (19) and the second threaded rod (20) are provided with movable plates (16) , both sides of the inner top of the base (5) are provided with partitions (13), and both ends of the partition (13) are provided with light sensors (14), the top of the base (5) Both sides are provided with rectangular slots (15), while the top of the movable plate (16) passes through the rectangular slots (15) and is fixed with a slide rail (3), and the top of the slide rail (3) is fixed with a slide block ( 1), the top of the slider (1) is fixed with a linkage bracket (22), and both ends of the linkage bracket (22) are fixed with splints (17), and the bottom of the splint (17) is equipped with a miniature oil cylinder (2), and one end of the miniature oil cylinder (2) telescopic rod is connected with the bottom end of the linkage support (22), and the output end of the control panel (9) and the light sensor (14) is all connected with the single-chip microcomputer (10) by the wire The input ends are electrically connected, and the output ends of the single-chip microcomputer (10) are respectively electrically connected with the input ends of the miniature oil cylinder (2) and the servo motor (7) through wires. 2. The auxiliary device for detecting the tensile strength of steel-concrete concrete according to claim 1, characterized in that: shock-absorbing rubber pads (12) are provided at the four corners of the bottom of the base (5), Moreover, the shock-absorbing rubber pad (12) and the base (5) are welded and integrated. 3. The auxiliary device for detecting tensile strength of steel-concrete concrete according to claim 1, characterized in that: a pad (18) is installed at the middle position of the top of the base (5), and the pad (18) 18) and the base (5) are disassembled and installed. 4. The auxiliary device for detecting the tensile strength of steel-concrete concrete according to claim 1, characterized in that: the bottom end of the movable plate (16) is provided with a limit block (11), while the base (5) A limiting slot (8) cooperating with the limiting block (11) is arranged at the top inside, and a sliding structure is formed between the limiting slot (8) and the limiting block (11). 5. The auxiliary device for detecting tensile strength of steel-concrete concrete according to claim 1, characterized in that: the inner side wall of the movable plate (16) is provided with an internal thread, the first threaded rod (19) and The surfaces of the second threaded rods (20) are all provided with external threads cooperating with the internal threads. 6. The auxiliary device for testing the tensile strength of steel-concrete concrete according to claim 1, characterized in that: between the first threaded rod (19) and the second threaded rod (20) about the base (5 ) are symmetrically distributed.