A positioning device for concrete test block axial compression

Abstract

The application relates to the technical field of material test auxiliary equipment, and particularly discloses a concrete test block axial compression positioning device, which comprises a positioning platform and a positioning sensor, the positioning platform is provided with a rotating and translating mechanism, the rotating and translating mechanism comprises at least four Mecanum wheels and a bearing disc, the bearing disc is placed on the Mecanum wheels, a signal output end of the positioning sensor is electrically connected with an input end of a display unit, the display unit is used for displaying a laser signal combination state in real time, and an operator can operate the rotating and translating mechanism to rotate and translate through a controller according to the display state. The patent aims to solve the problem of large initial positioning deviation caused by manually placing test blocks in the existing positioning device.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for material testing, and in particular to a axial compression positioning device for concrete test blocks. Background Technology

[0002] In the field of construction testing tools, concrete block compression testing is a crucial task, playing a key role in evaluating the quality and performance of concrete. Accurate axial compression test results provide a reliable basis for the design and construction of building structures, ensuring the safety and stability of buildings. With the continuous development of the construction industry, the requirements for the accuracy and efficiency of concrete block compression testing are becoming increasingly stringent.

[0003] In the prior art, in order to position concrete test blocks in a suitable position on a press, bolt assemblies are often used to fasten them to the press operating table. For example, CN209841548U discloses a tool-type concrete test block compression positioning device, which includes a limiting device, a positioning device, and an installation device. The positioning device is symmetrically arranged on both sides of the limiting device. One end of the positioning device is connected to the side of the limiting device, and the other end of the positioning device is slidably connected to the installation device. A support device perpendicular to the installation device is provided below it. The support device is fastened to the operating table by bolt assemblies.

[0004] Although existing technologies have achieved semi-automation of test block positioning, manual placement of the test block onto the support plate is still required. If the initial manual placement of the test block has a large deviation, the compensation pressure during subsequent mechanical positioning will also be very high. Therefore, test block placement depends on the operator's experience, and the placement position varies greatly among different personnel. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention provides a concrete test block axial compression positioning device, which solves the problem of large initial positioning deviation caused by manual placement of test blocks in existing positioning devices.

[0006] To solve the above problems, the technical solution adopted by this utility model is: a concrete test block axial compression positioning device, including a positioning platform and a positioning sensor. The positioning platform is provided with a rotation and translation mechanism, which includes at least four Mecanum wheels and a bearing plate. The bearing plate is placed on the Mecanum wheels. The signal output terminal of the positioning sensor is electrically connected to the input terminal of a display unit. The display unit is used to display the laser signal combination status in real time. The operator operates the rotation and translation mechanism to perform rotation and translation operations according to the display status through the controller.

[0007] Compared with existing technologies, the beneficial effects of this solution are: by controlling the steering of different wheels, the bearing plate can perform a combination of rotation and translation on the test block; combined with laser feedback, the attitude of the test block is adjusted in real time to ensure that the position of the test block is calibrated to the theoretical center line.

[0008] Furthermore, the display unit has two LEDs.

[0009] Furthermore, the positioning sensor includes two sets of parallel laser emitter-receiver pairs. Each laser emitter-receiver pair consists of a laser emitter and a laser receiver. A laser line is formed between the laser emitter and the laser receiver. The laser line is parallel to the preset pushing direction of the test block. The two sets of laser lines are parallel to each other and symmetrically arranged around the center of the press.

[0010] Furthermore, the positioning device also includes a spiral track and a conveyor belt. The top of the spiral track is connected to a positioning platform, and the test block is transported to the positioning platform via the conveyor belt set on the spiral track.

[0011] Furthermore, the spiral track includes a support frame, adjustable height legs, and a fixed suction cup. The support frame is a frame structure assembled by welding. The adjustable height legs adopt a screw and nut mechanism, and the fixed suction cup is installed on the side of the spiral track. The support frame is connected to the spiral track through the adjustable height legs. One end of the adjustable height legs is fixed to the support frame, and the other end is connected to the bottom of the spiral track. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure used in Embodiment 1 of this application.

[0013] Figure 2 This is a schematic diagram of the structure used in Embodiment 2 of this application.

[0014] The reference numerals in the accompanying drawings include: 1 positioning platform; 11 rotation and translation mechanism; 111 Mecanum wheel; 112 bearing plate; 12 positioning sensor; 121 laser emitter; 122 laser receiver; 2 spiral track; 21 support frame; 22 adjustable height support leg; 23 fixed suction cup; 24 conveyor belt; 3 press; 4 test block. Detailed Implementation

[0015] Example 1 like Figure 1As shown: The concrete test block axial compression positioning device provided in this application embodiment includes a positioning platform 1 and a positioning sensor 12. The rotation and translation mechanism 11 set on the positioning platform 1 is used to carry the concrete test block 4 and perform rotation and translation operations on it. The positioning sensor 12 is linked with the rotation and translation mechanism 11 to achieve the purpose of accurately controlling the position of the test block 4, so that the center of the test block 4, the center of the jacking device and the center of the press 3 are on a straight line. Finally, the test block 4 is pushed to the center of the press 3 by the jacking device.

[0016] Specifically, the rotation and translation mechanism 11 on the positioning platform 1 includes at least four Mecanum wheels 111 and a support plate 112.

[0017] A Mecanum wheel 111 is a special type of wheel with multiple small rollers distributed on its hub. The axes of these small rollers are at an angle to the axis of the hub. A Mecanum wheel 111 typically consists of a metal hub and small rubber rollers. The metal hub ensures the wheel's strength and durability, while the rubber rollers provide good friction. The Mecanum wheels 111 are linked through a hub drive module, which is driven by a motor. By controlling the rotational speed and direction of different Mecanum wheels 111, multi-degree-of-freedom movement of the support disc 112 can be achieved. For example, a Mecanum wheel disclosed in publication number CN222040135U includes a hub, roller shafts, and rollers. The hub is connected to an axle. Multiple roller shafts are arranged along the outer circumference of the hub, with their axes at an angle to the axis of the hub. Rollers are rotatably connected to the roller shafts, and each roller shaft has one roller.

[0018] The support plate 112 is circular and made of metal or high-strength plastic, possessing a certain degree of flatness and strength to stably support the concrete specimen 4. The support plate 112 rests on Mecanum wheels 111, whose rotation drives the support plate 112 to rotate and translate. Multiple Mecanum wheels 111 are distributed below the support plate 112, working together to precisely control its movement. When the hub drive module drives the Mecanum wheels 111 to rotate, depending on the driving method, the support plate 112 can achieve various movements such as forward and backward translation, left and right translation, and rotation, thereby precisely rotating and translating the concrete specimen 4 on the support plate 112 for positioning.

[0019] Specifically, the positioning sensor 12 on the positioning platform 1 includes two sets of parallel laser transmitting and receiving pairs.

[0020] The laser transmitter and receiver pair consists of a laser transmitter 121 and a laser receiver 122, forming a laser line between them. This laser line is parallel to the preset pushing direction of the test block 4. The two sets of laser lines are parallel to each other and symmetrically positioned around the center of the press 3. The width of the laser line is set just larger than the width of the test block 4, ensuring that the laser line connects when both sides of the test block 4 are parallel to it. The laser transmitter and receiver pair is installed at opposite positions on the edge of the positioning platform 1. The laser transmitter and receiver pair uses infrared laser, which offers high precision and stability.

[0021] Specifically, the rotation and translation mechanism 11 is operated by a manual controller for rotation and translation. The signal output terminal of the laser receiver 122 is electrically connected to the input terminal of the display unit. The display unit has two LEDs; when the laser line of the positioning sensor 12 is connected, the LEDs light up; when the laser line is blocked, the LEDs do not light up. The display unit is used to display the laser signal combination status in real time. Based on the displayed status, the operator operates the rotation and translation mechanism 11 to perform rotation and translation movements via the controller.

[0022] After test block 4 is delivered to positioning platform 1, the operator manually executes the following control logic based on the signal from the display unit: Condition 1: Both laser lines are blocked.

[0023] At this time, both LEDs on the display unit are off, and the test block 4 blocks both laser beams, indicating that there is an angular deviation between the axis of the test block and the center line of the press, i.e., they are not parallel. At this time, the operator manually controls the rotation and translation mechanism 11 through the controller, which drives the bearing plate 112 to rotate the test block 4 around the center of the bearing plate 112.

[0024] Condition 2: Only one laser line is connected, while the other is blocked.

[0025] At this time, only the LED on the side connected by the laser line is lit in the display unit. The test block 4 is biased towards the side where the laser is blocked, indicating that the center line of the test block 4 is deviated from the center line of the press. At this time, the operator manually controls the rotation and translation mechanism 11 through the controller to drive the bearing plate 112 to move the test block 4 in the horizontal direction of the side connected by the laser.

[0026] Condition 3: Both laser lines are connected.

[0027] At this point, both LEDs on the display unit will light up, and the laser beam will not be blocked on either side of test block 4, indicating that the side of test block 4 is parallel to the laser line, and the center line of test block 4 coincides with the center line of press 3, thus completing the positioning. At this time, the center of test block 4, the center of the pushing device, and the center of press 3 are on the same straight line. The operator then controls the pushing device to push the test block towards the center of the press.

[0028] Specifically, the jacking device (not shown in the figure) is a telescopic push rod.

[0029] The telescopic push rod can be an electric push rod or a hydraulic push rod. Taking an electric push rod as an example, it consists of a motor, a lead screw and nut mechanism, etc. The rotation of the motor drives the lead screw to rotate, thereby causing the nut to move linearly along the lead screw, realizing the extension and retraction of the push rod. The end of the telescopic push rod is equipped with an anti-slip clamping head, which is made of rubber or other materials with high friction. It can better clamp the test block 4 and prevent the test block 4 from slipping during the pushing process.

[0030] Example 2 like Figure 2 As shown: The axial compression positioning device for concrete test block 4 provided in this embodiment of the application further includes a spiral track 2 and a conveyor belt 24. The top of the spiral track 2 is connected to the positioning platform 1, and the test block 4 is transported to the positioning platform 1 by the conveyor belt 24 set on the spiral track 2.

[0031] Specifically, the spiral track 2 includes a support frame 21, adjustable height support legs 22, and a fixed suction cup 23.

[0032] The support frame 21 is made of metal, such as steel, possessing high strength and stability, providing reliable support for the spiral track 2. The support frame 21 is a frame structure assembled by welding. The height of the spiral track 2 is adjusted by changing the length of the adjustable height support leg 22, thus altering the overall tilt height of the spiral track 2. The adjustable height support leg 22 employs a hydraulic rod or a screw-nut mechanism. Taking the screw-nut mechanism as an example, the screw engages with the nut via threads; rotating the screw adjusts the height. By adjusting the height of the adjustable height support leg 22, the spiral track 2 can adapt to different working height requirements. The fixed suction cup 23 is made of a material with good adsorption properties, such as rubber, and is installed on the side of the spiral track 2. When it is necessary to fix the spiral track 2, the fixed suction cup 23 is pressed against the side of the press 3, expelling the air from the suction cup. Atmospheric pressure then firmly adheres the spiral track 2 to the side of the press 3, thereby achieving positioning and fixation of the spiral track 2. The adsorption force of the fixed suction cup 23 can be selected according to the weight of the spiral track 2 and the stability requirements during operation. The support frame 21 is connected to the spiral track 2 via adjustable height legs 22. One end of the adjustable height legs 22 is fixed to the support frame 21, and the other end is connected to the bottom of the spiral track 2, allowing for easy adjustment of the height of the spiral track 2. A fixed suction cup 23 is attached to the side of the press 3, providing additional stability to the spiral track 2 and preventing it from shaking or shifting during operation. The support frame 21, adjustable height legs 22, and fixed suction cup 23 of the spiral track 2 work together to ensure that the spiral track 2 can be stably installed in different working environments and its height can be adjusted as needed, providing a reliable foundation for the subsequent transport of the test block 4.

[0033] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A concrete test block axial compression positioning device, characterized in that: A concrete test block axial compression positioning device includes a positioning platform and a positioning sensor. The positioning platform is equipped with a rotation and translation mechanism, which includes at least four Mecanum wheels and a bearing plate. The bearing plate is placed on the Mecanum wheels. The signal output terminal of the positioning sensor is electrically connected to the input terminal of a display unit. The display unit is used to display the laser signal combination status in real time. The operator operates the rotation and translation mechanism to perform rotation and translation operations according to the display status through the controller.

2. The axial compression positioning device for a concrete test block according to claim 1, characterized in that: The display unit has two LEDs.

3. The axial compression positioning device for a concrete test block according to claim 2, characterized in that: The positioning sensor includes two sets of parallel laser emitter-receiver pairs. Each laser emitter-receiver pair consists of a laser emitter and a laser receiver. A laser line is formed between the laser emitter and the laser receiver. The laser line is parallel to the preset pushing direction of the test block. The two sets of laser lines are parallel to each other and symmetrically arranged around the center of the press.

4. The axial compression positioning device for concrete test blocks according to claim 1, characterized in that: The positioning device also includes a spiral track and a conveyor belt. The top of the spiral track is connected to a positioning platform, and the test block is transported to the positioning platform by the conveyor belt set on the spiral track.

5. The axial compression positioning device for a concrete test block according to claim 4, characterized in that: The spiral track includes a support frame, adjustable height legs, and a fixed suction cup. The support frame is a frame structure assembled by welding. The adjustable height legs adopt a screw and nut mechanism, and the fixed suction cup is installed on the side of the spiral track. The support frame is connected to the spiral track through the adjustable height legs. One end of the adjustable height legs is fixed to the support frame, and the other end is connected to the bottom of the spiral track.

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