Device for detecting crack resistance of hydraulic concrete structure

Abstract

The utility model relates to the technical field of crack resistance detection of concrete structures, and particularly discloses a crack resistance detection device for a hydraulic concrete structure. Comprising a shell, a flip cover detachably connected with the shell, a placing disc arranged in the shell and used for placing a to-be-tested object of a concrete structure, a heavy block arranged at the top in the shell, a manual assembly arranged outside the shell and used for pulling the heavy block to rise, and a spring assembly arranged at the top of the shell and detachably connected with the shell. The spring assembly comprises a dismounting plate, a plurality of springs arranged on the dismounting plate and a connecting plate, the springs are arranged between the dismounting plate and the connecting plate, the free end of the connecting plate is provided with a thin film pressure sensor, and the device solves the problem that impact force cannot be changed every time in concrete crack resistance detection through a traditional weight falling method.

Description

Technical Field

[0001] This application relates to the field of crack resistance testing technology for concrete structures, and specifically discloses a device for testing the crack resistance of hydraulic concrete structures. Background Technology

[0002] Currently, the common method for testing the crack resistance of concrete is the drop weight method, which involves continuous free-fall impact tests on standard concrete samples. Traditional testing methods are mostly manual, which is time-consuming, labor-intensive, and cumbersome.

[0003] The reason for testing the crack resistance of concrete is that it is one of the key characteristics that ensures the structural integrity of a building. Appropriate evaluation and testing methods can ensure the stability and durability of concrete structures, thereby improving the service life and safety of buildings.

[0004] Chinese Patent Publication No. CN215004704U discloses a device for testing the crack resistance of concrete used in building and civil engineering. The device includes a mounting frame, a testing platform, a fixed rod, and a testing pressure. Shock-absorbing cotton is fixedly connected to both inner walls of the mounting frame. A transmission structure is provided above the testing pressure. The transmission structure includes a drive motor, a driving gear, a driven gear, a connecting shaft, a connecting rod, a transmission rod, and a fixed shaft. A locking structure is provided between the fixed rod and the testing pressure. This invention solves the problem of cumbersome traditional manual testing operations by using a transmission structure and a drive motor to repeatedly move the testing pressure up and down to perform multiple impact and crack resistance tests. The locking structure facilitates the disassembly and replacement of different types of testing pressures to perform crack resistance tests of varying strengths, making it easy to measure the crack resistance of different types of concrete. The shock-absorbing cotton prevents fragments of broken concrete from flying everywhere during testing and injuring operators.

[0005] The purpose of repeatedly testing the impact resistance and crack resistance by driving the testing fixture up and down with a drive motor is meaningless. It can only show that the concrete cannot resist the impact under multiple impacts, i.e., concrete fatigue.

[0006] In the testing of impact resistance and crack resistance, it is necessary to ensure that the impact force gradually increases with each impact in order to make the most intuitive test of the concrete. However, the drop weight method requires increasingly higher and higher heights, which places high demands on the environment and is therefore not feasible in many cases. In view of this, the inventors proposed a device for testing the crack resistance of hydraulic concrete structures. Utility Model Content

[0007] The purpose of this invention is to solve the problem that the impact force cannot be changed for each impact in the traditional drop weight method for testing the crack resistance of concrete.

[0008] To achieve the above objectives, this utility model provides the following basic solution.

[0009] A device for testing the crack resistance of hydraulic concrete structures includes a shell, a flip cover detachably connected to the shell, a placement tray inside the shell for placing the concrete structure to be tested, a weight at the top inside the shell, a manual component outside the shell for pulling the weight up, and a spring assembly at the top of the shell that is detachably connected to the shell.

[0010] The spring assembly includes a disassembly plate, several springs disposed on the disassembly plate, and a connecting plate. The springs are disposed between the disassembly plate and the connecting plate, and a thin-film pressure sensor is provided at the free end of the connecting plate.

[0011] The principle and effect of this basic scheme are as follows:

[0012] 1. Compared with existing technologies, this device has a simple structure and ingenious design. This device solves the problem that the impact force cannot be changed for each impact in the traditional drop weight method for testing the crack resistance of concrete. This device does not use a drive motor to lift the weight. After the weight is lifted, it needs to land on the concrete test object. If the drive motor is rotating forward to lift the weight, it will rotate in reverse when the weight lands on the concrete test object. Moreover, it will rotate in reverse rapidly. In the process of frequent testing, the motor will be damaged. Therefore, this device uses a manual component to replace the drive motor, thereby avoiding the problem of motor damage caused by motor reversal.

[0013] 2. Compared with the existing technology, this device has a simple structure. The device is equipped with a spring assembly and a thin-film pressure sensor. The pressure obtained by the thin-film pressure sensor is directly reflected in the compression of the spring assembly. When the weight rises and needs to fall on the concrete test object, the compression of the spring assembly is transformed into an elastic force with the same weight, that is, different impact forces of the weight at the same height are realized. This provides a more intuitive understanding of the crack resistance test of concrete.

[0014] 3. Compared with existing technologies, in order to achieve different impact forces on the weight at the same height, this device is equipped with a detachable spring assembly. Different spring assemblies are used to achieve different impact forces on the weight at the same height, which are then applied to the concrete test object to perform crack resistance testing. Since this device can achieve different impact forces on the weight at the same height, the requirements for the environment and equipment are reduced, and the weight no longer needs to be dropped from a higher position.

[0015] Furthermore, one end of the housing is provided with a hinge, which includes a fixed end and a movable end. The fixed end is connected to the housing, and the movable end is connected to the flip cover.

[0016] Furthermore, the flip cover is made of transparent plastic, allowing for a reasonable view of the interior of the casing.

[0017] Furthermore, the placement tray includes a placement column fixed to the bottom of the housing and a tray body fixed to the free end of the placement column, with the concrete structure to be tested placed on the tray body.

[0018] Furthermore, the artificial component includes a connecting block, a rotating shaft, and a traction rope symmetrically arranged on the top of the housing. One end of the rotating shaft is rotatably connected to the connecting block, and the other end of the rotating shaft extends through another connecting block and is provided with a handle. One end of the traction rope is fixed to the rotating shaft, and the other end of the traction rope passes through the housing and is connected to the weight.

[0019] Furthermore, the top of the housing is provided with a through hole, through which the traction rope passes and connects to the weight. The weight is provided with a contact block, the size of which is larger than the size of the through hole. The housing also includes a pressure sensor and a display at the top of the housing. The display shows the pressure sensor value after the contact block contacts the pressure sensor.

[0020] Furthermore, the top of the housing has a through groove, the size of which is equal to the size of the connecting plate. The size of the disassembly plate is larger than that of the connecting plate. The disassembly plate has connecting holes around its perimeter, and connecting screws are connected to these holes. The spring assembly and the housing are connected by the connecting screws. After the spring assembly is installed, the inner top surface of the housing and the connecting plate are on the same plane.

[0021] Furthermore, the display can show the values ​​from the thin-film pressure sensor. By displaying the values ​​from the thin-film pressure sensor, it is possible to determine how much additional elastic force was applied, and thus how much the impact force increased. Attached Figure Description

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

[0023] Figure 1 This is a front view of the crack resistance testing device for hydraulic concrete structures proposed in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the structure of the crack resistance testing device for hydraulic concrete structures proposed in this application embodiment is shown. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0026] The reference numerals in the accompanying drawings include: housing 1, display 2, load-bearing plate 3, support column 4, disc 5, handle 6, connecting block 7, rotating shaft 8, contact block 9, weight 10, disassembly plate 11, connecting hole 12, through hole 13, mounting plate 14, spring 15, connecting plate 16, and diaphragm pressure sensor 17.

[0027] Implementation, for example Figure 1 and Figure 2 As shown:

[0028] A device for testing the crack resistance of hydraulic concrete structures includes a housing 1, a flip cover detachably connected to the housing 1, a placement tray inside the housing 1 for placing the concrete structure to be tested, a weight 10 placed at the top inside the housing 1, a manual component outside the housing 1 for pulling the weight 10 upward, and a spring 15 assembly detachably connected to the housing 1 at the top of the housing 1. The spring 15 assembly includes a disassembly plate 11, several springs 15 and a connecting plate 16 placed on the disassembly plate 11. The springs 15 are placed between the disassembly plate 11 and the connecting plate 16. A thin film pressure sensor 17 is provided at the free end of the connecting plate 16. A load-bearing plate 3 is provided at the bottom of the housing 1. The size of the load-bearing plate 3 is larger than the size of the housing 1. An installation plate 14 is provided between the springs 15 and the disassembly plate 11. One end of the installation plate 14 is connected to the spring 15, and the other end of the installation plate 14 is fixed to the disassembly plate 11.

[0029] In terms of overall structure:

[0030] One end of the housing 1 is equipped with a hinge, which includes a fixed end and a movable end. The fixed end is connected to the housing 1, and the movable end is connected to a flip cover. The flip cover is made of transparent plastic, allowing for a reasonable view of the interior of the housing 1.

[0031] Since it is necessary to observe the inside of the casing 1 manually, a transparent plastic material was used to facilitate observation by staff.

[0032] The placement tray includes a placement column fixed to the bottom of the housing 1 and a tray body 5 fixed to the free end of the placement column. The concrete structure to be tested is placed on the tray body 5.

[0033] The most basic placement tray is used, and the stability of the entire placement tray is improved by using placement columns. The tray body 5 supports the concrete structure to be tested.

[0034] To avoid the problem of reduced motor lifespan caused by motor reversal, this device does not use a drive component; instead, it uses a manual component.

[0035] The artificial component includes a connecting block 7, a rotating shaft 8, and a traction rope symmetrically arranged on the top of the housing 1. One end of the rotating shaft 8 is rotatably connected to the connecting block 7, and the other end of the rotating shaft 8 extends through another connecting block 7 and is provided with a handle 6. One end of the traction rope is fixed to the rotating shaft 8, and the other end of the traction rope passes through the housing 1 and is connected to the weight 10.

[0036] Specifically: Turning handle 6 causes rotating shaft 8 to rotate, which in turn causes the traction rope to wind around. Once the traction rope is wound around, the weight 10 rises.

[0037] At this time, the top of the housing 1 is provided with a through hole 13, the traction rope passes through the through hole 13 and connects with the weight 10, the weight 10 is provided with a contact block 9, the size of the contact block 9 is larger than the size of the through hole 13, and also includes a pressure sensor and a display 2 at the top of the housing 1. After the contact block 9 contacts the pressure sensor, the display 2 displays the value of the pressure sensor.

[0038] When the weight 10 rises, the contact block 9 contacts the inner top of the housing 1, and then the pressure sensor displays a certain value. When the value is displayed, it means that the weight 10 has reached the height. At this time, the handle 6 is released, the force of the traction rope is removed, and the weight 10 falls and lands on the concrete structure to be tested, so as to carry out the concrete crack resistance test by the drop weight method.

[0039] Because the height is consistent and the impact force is consistent each time, this testing method is not optimal. Therefore, a spring 15 assembly was added.

[0040] Specifically:

[0041] The top of the housing 1 has a through groove, the size of which is equal to the size of the connecting plate 16. The size of the disassembly plate 11 is larger than the size of the connecting plate 16. The disassembly plate 11 has connecting holes 12 around its perimeter. Connecting screws are connected to the connecting holes 12. The spring 15 assembly and the housing 1 are connected by the connecting screws. After the spring 15 assembly is installed, the inner top surface of the housing 1 and the connecting plate 16 are on the same plane.

[0042] The display 2 can display the values ​​of the thin-film pressure sensor 17. By displaying the values ​​of the thin-film pressure sensor 17, it is possible to determine how much additional elastic force has been applied, and thus how much the impact force has increased.

[0043] Similarly, when the weight 10 rises, it does work against the spring 15. The spring 15 is in a compressed state, and the membrane pressure sensor 17 has a value. That is, the pressure on the spring 15 is displayed through the membrane pressure sensor 17 and the display 2.

[0044] Then, the work done by overcoming spring 15 continues, so that contact block 9 can contact pressure sensor and display 2 displays the pressure sensor value. When contact block 9 can contact pressure sensor and display 2 displays pressure sensor value, it means that weight 10 has reached the predetermined height. However, at this time, the height is added with the elastic force of overcoming spring 15. Therefore, when handle 6 is released, since spring 15 needs to be reset, weight 10 is no longer in free fall motion, but the elastic force at the same height does work, and the resulting impact force will be greater. Since the elastic coefficient of spring 15 in spring 15 assembly can be changed, different impact forces can be obtained. Therefore, this device solves the problem that the impact force cannot be changed each time in the traditional drop weight method for testing the crack resistance of concrete.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for detecting the crack resistance of a hydraulic concrete structure, characterized in that: The utility model provides a concrete structure testing device, including shell, the flip that is detachably connected with shell, set up in the placement tray of shell inside for placing concrete structure to be measured, set up in the heavy block of shell top, set up in the manual assembly of shell outside for pulling the heavy block ascension, and set up in the spring assembly of shell top with shell detachable connection, The spring assembly includes a disassembly plate, a plurality of springs disposed on the disassembly plate, and a connecting plate, the springs are disposed between the disassembly plate and the connecting plate, and a free end of the connecting plate is provided with a thin film pressure sensor.

2. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 1, wherein One end of the shell is provided with a hinge, the hinge includes a fixed end and a movable end, the fixed end is connected to the shell, and the movable end is connected to the flip.

3. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 2, characterized in that, The flip is made of transparent plastic material.

4. The apparatus for detecting the crack resistance of a hydraulic concrete structure according to claim 2 or 3, characterized in that, The placement tray includes a placement column fixed to the bottom of the shell and a disc body fixed to a free end of the placement column, and the concrete structure to be measured is arranged on the disc body.

5. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 4, characterized by The manual assembly includes connecting blocks symmetrically arranged on the top of the shell, a rotating shaft, and a traction rope, one end of the rotating shaft is rotatably connected to the connecting block, the other end of the rotating shaft passes through the other connecting block and is provided with a handle, one end of the traction rope is fixed to the rotating shaft, and the other end of the traction rope passes through the shell and is connected to the heavy block.

6. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 5, wherein The top of the shell is provided with a through hole, the traction rope passes through the through hole and is connected to the heavy block, the heavy block is provided with a contact block, the size of the contact block is greater than the size of the through hole, and the top of the shell is provided with a pressure sensor and a display, the contact block can contact the pressure sensor, and the display displays the value of the pressure sensor.

7. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 6, characterized by The top of the shell is provided with a through groove, the size of the through groove is equal to the size of the connecting plate, the size of the disassembly plate is greater than the size of the connecting plate, the periphery of the disassembly plate is provided with a connecting hole, the connecting hole is connected with a connecting screw, the spring assembly and the shell are connected through the connecting screw, after the spring assembly is installed, the inner top surface of the shell and the connecting plate are in the same plane.

8. The device for detecting the crack resistance of a hydraulic concrete structure according to claim 7, characterized by The display can realize the value of the thin film pressure sensor.

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