Drop hammer impact device for detecting impact performance of concrete

Abstract

The utility model relates to the technical field of concrete detection, and particularly provides a drop hammer impact device for concrete impact performance detection, which comprises a base, a detection table, an impact hammer, a detection table rotation adjusting component and an impact hammer driving component, the detection table rotation adjusting assembly comprises a supporting seat and a turntable; the supporting seat is mounted on the base; the top of the supporting seat is rotationally matched with a turntable; a detection table is mounted at the top of the turntable; the impact hammer driving assembly comprises a bracket, a guide sleeve and a guide rod; the support is installed on the base and located on one side of the detection table. A vertical guide sleeve is mounted on the bracket; the guide rod penetrates through the guide sleeve and is movably matched with the guide sleeve in the vertical direction; an impact hammer is mounted at the bottom of the guide rod. The detection table is arranged on the rotatable turntable, so that different positions of the concrete test piece can be detected, and the universality of a detection result is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete detection, and in particular relates to a drop hammer impact device for detecting the impact performance of concrete. Background Art

[0002] At present, the testing methods for the impact resistance of concrete are mainly divided into low-speed impact and high-speed impact. Among them, the commonly used testing method for low-speed impact is the drop hammer impact test, that is, the hammer is manually lifted to a specified height, and then the hammer is released to fall freely to impact the specimen, thereby realizing the impact resistance of concrete.

[0003] The patent with announcement number CN217688372U in the prior art discloses a new type of concrete impact resistance performance testing device. When the device is in use, the pressure data generated is transmitted to the controller through the pressure detection component, and at the same time, people observe the detection part to achieve one or more detections of the detection part; the controller controls the operation of the cleaning device to drive the bristles to swing back and forth, and effectively clean the surface of the pressure detection component. However, since the electromagnet of the device is fixed at the same horizontal plane, it can only detect the same position of the concrete material, and the detection result is not universal. In addition, when the electromagnet absorbs the impact hammer and lifts it, the state of the impact hammer is unstable and it is easy to fall off the electromagnet. Therefore, a drop hammer impact device for concrete impact resistance performance testing is needed to meet the use requirements. Utility Model Content

[0004] In response to the problems existing in the above-mentioned existing construction technology, the utility model provides a drop hammer impact device for testing the impact performance of concrete, which can adjust the position of the concrete test piece, test different positions of the concrete test piece, and improve the universality of the test results.

[0005] The utility model proposes a drop hammer impact device for testing the impact performance of concrete, comprising: a base, a testing platform, an impact hammer, a testing platform rotation adjustment assembly and an impact hammer drive assembly; the testing platform rotation adjustment assembly comprises a support seat and a turntable; the support seat is mounted on the base, and the top of the support seat is rotatably engaged with the turntable; the top of the turntable is mounted with the testing platform for carrying the concrete test piece; the impact hammer drive assembly comprises a bracket, a guide sleeve and a guide rod; the bracket is mounted on the base and is located on one side of the testing platform; a vertical guide sleeve is mounted on the bracket; the guide rod passes through the guide sleeve and is vertically movably engaged with the guide sleeve; the bottom of the guide rod is mounted with the impact hammer; the impact hammer is located above the testing platform.

[0006] Furthermore, the detection platform rotation adjustment assembly also includes a fixed sleeve and a movable steel ball; the fixed sleeve is installed on the top of the support seat, and the movable steel balls are distributed inside the fixed sleeve; the bottom of the turntable is embedded in the fixed sleeve and contacts the movable steel balls.

[0007] Furthermore, the detection platform rotation adjustment assembly also includes a rotation drive assembly, which is arranged in the support base and connected to the turntable to drive the turntable to rotate.

[0008] Furthermore, the rotation drive assembly includes an adjusting shaft, an adjusting gear, an adjusting motor, a driving shaft and a driving gear; one end of the adjusting shaft is fixedly connected to the turntable, and the other end is fitted with the adjusting gear; the driving gear is engaged with the adjusting gear, the driving gear is installed on the driving shaft, and the driving shaft is connected to the adjusting motor; the adjusting motor is installed on the base.

[0009] Furthermore, the impact hammer driving assembly also includes a lifting assembly; the lifting assembly is connected to the guide rod and is used to lift the guide rod.

[0010] Furthermore, the lifting assembly includes an L-shaped frame, a transmission gear, a rotating rod, a support rod, a transmission rack, a movable round pin and a vertical pulling assembly; the transmission rack is installed at one end of the vertical pulling assembly, one end of the L-shaped frame is connected to the bracket, and the other end is connected to the transmission gear meshing with the transmission rack; the center of the transmission gear is connected to a rotating rod, and the rotation of the transmission gear drives the rotating rod to swing; the other end of the rotating rod is connected to the movable round pin; one end of the support rod is connected to the top of the guide rod, and a movable groove is provided on the support rod; the movable round pin is inserted into the movable groove.

[0011] Furthermore, the vertical pulling assembly includes a pull rod, a connecting block, a telescopic rod and a pedal; the telescopic rod is vertically installed on the base, the connecting block is installed on the top of the telescopic rod, the pedal is installed on one side of the connecting block, the pull rod is installed on the top of the connecting block, and the pull rod is connected to the transmission rack.

[0012] Furthermore, the vertical pulling assembly also includes a return spring; the return spring is supported between the connecting block and the base.

[0013] Furthermore, the rotating rod is arranged at an angle, the transmission gear and the movable round pin are respectively arranged at both ends of the rotating rod, and the setting height of the transmission gear is lower than the setting height of the movable round pin.

[0014] Furthermore, the central axis of the transmission gear is arranged horizontally and is parallel to the central axis of the movable round pin.

[0015] The beneficial effects of the present invention are as follows: by placing the testing platform on a rotatable turntable and placing the concrete specimen on the testing platform, the rotating testing platform can adjust the position of the concrete specimen, thereby changing the drop position of the impact hammer, allowing testing at different positions of the concrete specimen, and improving the universality of the test results. The impact hammer is connected to the guide rod, and the guide sleeve guides the guide rod to rise and fall, which is convenient to operate, can also ensure the accuracy of the impact hammer's landing point, and improve testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a drop hammer impact device for testing the impact performance of concrete in the present utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure in which the fixed sleeve and the turntable are separated;

[0018] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the detection platform rotation adjustment component;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure from another perspective;

[0020] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of the transmission gear and transmission rack.

[0021] In the figure: 1-base; 2-testing table; 3-impact hammer; 4-testing table rotation adjustment assembly; 41-support seat; 42-fixing sleeve; 43-movable steel ball; 44-turntable; 45-adjusting shaft; 46-adjusting gear; 47-adjusting motor; 48-driving shaft; 49-driving gear; 5-impact hammer driving assembly; 51-bracket; 52-guide sleeve; 53-guide rod; 54-L-shaped frame; 55-transmission gear; 56-rotating rod; 57-support rod; 58-transmission rack; 59-pull rod; 510-connecting block; 511-reset spring; 512-telescopic rod; 513-pedal; 514-movable slot; 515-movable round pin. DETAILED DESCRIPTION

[0022] The following is a further detailed description of this application with reference to the accompanying drawings and specific implementations:

[0023] like Figure 1-Figure 5The device shown is a drop hammer impact device for testing the impact properties of concrete, comprising a base 1, a testing platform 2, an impact hammer 3, a testing platform rotation adjustment assembly 4, and an impact hammer drive assembly 5. The testing platform 2 is positioned above the base 1 and is used to place a concrete specimen under test. The impact hammer 3 is positioned on the testing platform 2 and is used to impact the concrete specimen. The testing platform rotation adjustment assembly 4 is positioned between the base 1 and the testing platform 2 and is used to adjust the testing position of the concrete specimen. The impact hammer drive assembly 5 is positioned on the base 1 and located to one side of the testing platform 2. It is connected to the impact hammer 3 and is used to drive the impact hammer 3 to perform impact performance testing on the concrete specimen.

[0024] The concrete specimen to be tested is placed on the testing table 2. A variety of concrete materials of different shapes can be placed on the testing table 2. When it is necessary to test the concrete specimen on the testing table 2, the impact hammer driving assembly 5 can be used to drive the impact hammer 3 to rise to the target height, and the impact hammer driving assembly 5 is released. At this time, the impact hammer 3 will automatically fall down under the action of its own gravity and the resetting action of the impact hammer driving assembly 5, and a drop hammer impact test is performed on the concrete specimen placed on the testing table 2. When it is necessary to test different positions of the concrete material specimen, the testing table 2 can be driven to rotate by the testing table rotation adjustment assembly 4, thereby changing the drop hammer position of the impact hammer 3 on the testing table 2, and testing different positions of the concrete specimen, thereby improving the universality of the test results.

[0025] Specifically, the detection platform rotation adjustment component 4 includes a support base 41 installed on the base 1, a fixed sleeve 42 is installed on the support base 41, a movable steel ball 43 is movably installed in the fixed sleeve 42, a turntable 44 is rotatably installed in the fixed sleeve 42, and the turntable 44 is installed at the bottom of the detection platform 2; a movable steel ball 43 is arranged between the turntable 44 and the fixed sleeve 42.

[0026] The setting of the support seat 41 can provide a stable support for the test platform 2 and the concrete test piece on the test platform 2. The rotation of the turntable 44 in the fixed sleeve 42 can drive the test platform 2 to rotate, and the position of the concrete test piece can be adjusted. The setting of the movable steel ball 43 can reduce the friction when the turntable 44 rotates.

[0027] Specifically, the detection table rotation adjustment component 4 also includes an adjustment shaft 45 installed at the bottom of the turntable 44. The bottom end of the adjustment shaft 45 passes through the fixed sleeve 42 and extends into the support seat 41. An adjustment gear 46 is installed. An adjustment motor 47 is installed on the base 1. A drive shaft 48 is installed at the output end of the adjustment motor 47. A drive gear 49 is installed at the end of the drive shaft 48. The drive gear 49 is engaged with the adjustment gear 46; the adjustment gear 46 is installed on the adjustment shaft 45.

[0028] When it is necessary to drive the testing platform 2 to rotate, the adjusting motor 47 can be started. The rotation of the adjusting motor 47 will drive the driving shaft 48 to rotate. The rotation of the driving shaft 48 will drive the adjusting gear 46 to rotate. The rotation of the adjusting gear 46 will drive the adjusting shaft 45 to rotate. The rotation of the adjusting shaft 45 will drive the turntable 44 to rotate. The rotation of the turntable 44 can drive the testing platform 2 to rotate to adjust the position of the concrete test piece.

[0029] The impact hammer driving assembly 5 includes a bracket 51 mounted on the base 1 , a guide sleeve 52 is mounted on the bracket 51 , a guide rod 53 is movably mounted in the guide sleeve 52 , and the impact hammer 3 is mounted on the bottom end of the guide rod 53 .

[0030] When impact testing is required for the concrete specimen, the guide rod 53 moves upward in the guide sleeve 52 to drive the impact hammer 3 to move upward. When the impact hammer 3 falls, a drop hammer impact test can be performed on the concrete specimen placed on the test platform 2.

[0031] The impact hammer drive assembly 5 also includes an L-shaped frame 54 mounted on the bracket 51, on which a transmission gear 55 is rotatably mounted, and a rotating rod 56 is mounted on the transmission gear 55. A support rod 57 is mounted on the top of the guide rod 53, and the other end of the rotating rod 56 is movably mounted on the support rod 57. A transmission rack 58 is meshed with the transmission gear 55; a movable groove 514 is formed on the support rod 57, and a movable round pin 515 is movably mounted in the movable groove 514, and the other end of the rotating rod 56 is rotatably mounted on the movable round pin 515.

[0032] When the impact hammer 3 needs to be lifted, the transmission rack 58 moves downward to drive the transmission gear 55 to rotate, and the rotation of the transmission gear 55 drives the rotating rod 56 to rotate or swing around the central axis of the transmission gear 55. During the rotation of the rotating rod 56, the movable round pin 515 at its end cooperates with the movable groove 514 provided on the support rod 57. While the movable round pin 515 moves along the movable groove 514, it lifts the support rod 57 to move it upward. The upward movement of the support rod 57 drives the guide rod 53 to move upward in the guide sleeve 52. The upward movement of the guide rod 53 can lift the impact hammer 3 upward.

[0033] The impact hammer drive assembly 5 also includes a pull rod 59 installed at the bottom end of the transmission rack 58, and a connecting block 510 is installed at the bottom end of the pull rod 59. A return spring 511 and a telescopic rod 512 are installed at the bottom end of the connecting block 510. The other ends of the return spring 511 and the telescopic rod 512 are installed on the base 1, and a pedal 513 is installed on the connecting block 510.

[0034] When it is necessary to drive the transmission rack 58 to move downward, the foot can be stepped on the pedal 513. The downward movement of the pedal 513 will drive the connecting block 510 to move downward. The downward movement of the connecting block 510 will drive the transmission rack 58 to move downward, and the return spring 511 will be compressed; release the pedal 513, and under the return action of the return spring 511, the pedal 513 will automatically return to its original position. The telescopic rod 512 can make the pedal 513 move up and down stably, avoiding the pedal 513 from being skewed when stepped on.

[0035] Working principle: When in use, the concrete specimen to be tested is placed on the testing platform 2. The testing platform 2 can be used to place concrete specimens of various shapes. When it is necessary to perform a drop hammer impact test on the concrete specimen on the testing platform 2, the foot can be stepped on the pedal 513. The downward movement of the pedal 513 will drive the connecting block 510 to move downward. The downward movement of the connecting block 510 will drive the transmission rack 58 to move downward. The downward movement of the transmission rack 58 will drive the transmission gear 55 to rotate. The rotation of the transmission gear 55 will drive the rotating rod 56 to rotate. The rotation of the rotating rod 56 will drive the movable round pin 515 to move in the movable groove 514. The movement of the movable round pin 515 will drive the support rod 57 to move upward. The upward movement of the support rod 57 will drive the guide rod 53 to move upward in the guide sleeve 52. The upward movement of the guide rod 53 can lift the impact hammer 3 upward. Release the pedal 513. At this time, the impact hammer 3 will automatically fall down under the action of its own gravity and the reset action of the reset spring 511 to perform a drop hammer impact test on the concrete specimen placed on the test platform 2. The operation is relatively convenient. When it is necessary to test different positions of the concrete specimen, the adjustment motor 47 can be started. The rotation of the adjustment motor 47 will drive the drive shaft 48 to rotate. The rotation of the drive shaft 48 will drive the adjustment gear 46 to rotate. The rotation of the adjustment gear 46 will drive the adjustment shaft 45 to rotate. The rotation of the adjustment shaft 45 will drive the turntable 44 to rotate. The turntable 44 rotates in the fixed sleeve 42 to drive the test platform 2 to rotate. The position of the concrete specimen under test can be adjusted, thereby changing the position where the impact hammer 3 impacts the specimen, and performing drop hammer impact tests on different positions of the concrete specimen, thereby improving the universality of the test results.

[0036] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A drop hammer impact device for testing the impact performance of concrete, characterized in that: include: Base, test table, impact hammer, test table rotation adjustment assembly and impact hammer drive assembly; The rotation adjustment assembly of the testing platform includes a support seat and a turntable; the support seat is installed on the base, and the top of the support seat is rotatably engaged with the turntable; the top of the turntable is installed with the testing platform for carrying the concrete test piece; the impact hammer drive assembly includes a bracket, a guide sleeve and a guide rod; the bracket is installed on the base and is located on one side of the testing platform; a vertical guide sleeve is installed on the bracket; the guide rod passes through the guide sleeve and is vertically engaged with the guide sleeve; the impact hammer is installed at the bottom of the guide rod; the impact hammer is located above the testing platform.

2. A drop hammer impact device for testing the impact performance of concrete according to claim 1, characterized in that: The detection platform rotation adjustment assembly also includes a fixed sleeve and movable steel balls; the fixed sleeve is installed on the top of the support seat, and the movable steel balls are distributed inside the fixed sleeve; the bottom of the turntable is embedded in the fixed sleeve and contacts the movable steel balls.

3. A drop hammer impact device for testing the impact performance of concrete according to claim 2, characterized in that: The detection platform rotation adjustment assembly further includes a rotation drive assembly, which is disposed in the support seat and connected to the turntable to drive the turntable to rotate.

4. A drop hammer impact device for testing the impact performance of concrete according to claim 3, characterized in that: The rotation drive assembly includes an adjusting shaft, an adjusting gear, an adjusting motor, a driving shaft and a driving gear; one end of the adjusting shaft is fixedly connected to the turntable, and the other end is fitted with the adjusting gear; the driving gear is engaged with the adjusting gear, and the driving gear is mounted on the driving shaft, and the driving shaft is connected to the adjusting motor; the adjusting motor is mounted on the base.

5. The drop hammer impact device for testing the impact performance of concrete according to claim 1, characterized in that: The impact hammer driving assembly further includes a lifting assembly; the lifting assembly is connected to the guide rod and is used to lift the guide rod.

6. A drop hammer impact device for testing the impact performance of concrete according to claim 5, characterized in that: The lifting assembly includes an L-shaped frame, a transmission gear, a rotating rod, a support rod, a transmission rack, a movable round pin and a vertical pulling assembly; the transmission rack is installed at one end of the vertical pulling assembly, one end of the L-shaped frame is connected to the bracket, and the other end is connected to the transmission gear meshing with the transmission rack; the center of the transmission gear is connected to a rotating rod, and the rotation of the transmission gear drives the rotating rod to swing; the other end of the rotating rod is connected to the movable round pin; one end of the support rod is connected to the top of the guide rod, and a movable groove is provided on the support rod; the movable round pin is inserted into the movable groove.

7. A drop hammer impact device for testing the impact performance of concrete according to claim 6, characterized in that: The vertical pulling assembly includes a pull rod, a connecting block, a telescopic rod and a pedal; the telescopic rod is vertically installed on the base, the connecting block is installed on the top of the telescopic rod, the pedal is installed on one side of the connecting block, the pull rod is installed on the top of the connecting block, and the pull rod is connected to the transmission rack.

8. A drop hammer impact device for testing the impact performance of concrete according to claim 7, characterized in that: The vertical pulling assembly further includes a return spring; the return spring is supported between the connecting block and the base.

9. A drop hammer impact device for testing the impact performance of concrete according to claim 6, characterized in that: The rotating rod is arranged at an angle, the transmission gear and the movable round pin are respectively arranged at two ends of the rotating rod, and the arrangement height of the transmission gear is lower than the arrangement height of the movable round pin.

10. A drop hammer impact device for testing the impact performance of concrete according to claim 9, characterized in that: The central axis of the transmission gear is arranged horizontally and is parallel to the central axis of the movable round pin.

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