Impact resistance test device for special concrete

Abstract

The utility model relates to the technical field of concrete detection, and discloses an impact resistance test device for special concrete, which comprises a bottom plate, a test piece, a steel ball and a drop hammer. According to the impact resistance test device for the special concrete, by arranging a stepping motor, a first gear can be driven, a rotating rod is driven to rotate through gear meshing, accurate winding and unwinding of a winding drum are achieved, the path of a pull rope can be guided through a guide wheel, friction and deviation are reduced, and by arranging an electric clamping claw, a clamping block at the top of a drop hammer can be clamped, so that the impact resistance of the drop hammer is improved. The drop hammer can be grabbed and released and can be automatically released during power failure, the drop hammer can be stably hung by clamping the clamping block by the electric clamping claw, the sliding path of the configuration block can be restrained by arranging the limiting frame, deviation of the configuration block can be prevented, the position of the configuration block can be fixed by arranging the bolt and the nut, and the additional mass of the drop hammer can be adjusted by arranging the configuration block. The total mass of the drop hammer is adjusted by increasing or decreasing the number to meet different impact energy requirements.

Description

Technical Field

[0001] This application relates to the field of concrete testing technology, specifically to an impact testing device for special concrete. Background Technology

[0002] With the continuous advancement of new materials, processes, and technologies, the performance of concrete and its structures has been greatly improved. Impact resistance is an important test and evaluation indicator for special concrete and its structures.

[0003] An existing patent (publication number: CN216978685U) discloses an impact testing device for concrete, belonging to the field of concrete testing technology. This invention overcomes the problems of existing concrete material testing devices, such as rudimentary processes, high manual labor intensity, and discrete test data, which hinder the technological development and application of impact-resistant concrete. The proposed solution includes a base with a fixed frame mounted on top. A steel ball channel is located at the center of the top of the fixed frame. A specimen is placed inside the fixed frame, and a steel ball is placed inside the steel ball channel, positioned on top of the specimen. Vertical sliding frames are connected to both ends of the top of the steel ball channel. A drop hammer is located between the vertical sliding frames, with extension rods connected to both ends of the drop hammer. A connecting frame is connected to the top of the extension rods, and a hollow tube is connected to the connecting frame. Both the extension rods and the hollow tube are slidably connected to the vertical sliding frames. This invention achieves a more labor-saving and accurate test data compared to manual impact testing.

[0004] Although the device in the aforementioned comparative document solves the problems of rudimentary technology, high labor intensity, and discrete test data in related test devices, the weight of the drop hammer body of the device is fixed, and the lifting distance is limited when the height of the drop hammer body is raised, which cannot meet the testing requirements of different concrete grades. In order to solve the above problems, a special impact resistance test device for concrete is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a special concrete impact testing device with advantages such as weight adjustment and height adjustment functions. This solves the problem that the weight of the drop hammer body is fixed, and the lifting distance is limited when the height of the drop hammer body is raised, making it difficult to adapt to the testing requirements of different concrete grades.

[0006] To achieve the above objectives, this application provides the following technical solution: a special concrete impact resistance testing device, comprising a base plate, a test piece, a steel ball and a drop hammer, wherein a protective shell and a U-shaped plate are fixedly connected to the top of the base plate, and a through hole is provided on the top of the protective shell;

[0007] The top of the U-shaped plate is fixedly connected to two opposite sides of a first sliding frame. A second sliding frame is slidably connected inside the first sliding frame. A top plate is fixedly connected to the top of the second sliding frame. A wire hole is opened on the top of the top plate. A stepper motor, two support plates, and two upright plates are fixedly connected to the top of the top plate. Two guide wheels are rotatably connected between the two support plates via pins. A rotating rod is tightly nested between the two support plates via bearings. A first gear is fixedly connected to the output end of the stepper motor. A second gear and a take-up drum are fixedly connected to the surface of the rotating rod. The first gear and the second gear mesh with each other. A pull rope is wound inside the take-up drum. One end of the pull rope passes through the two guide wheels and the wire hole and is fixedly connected to an electric gripper. A connecting plate is fixedly connected to the top of the drop hammer. A clamping block, four limit frames, and two bolts are fixedly connected to the top of the connecting plate. The clamping block is engaged in the electric gripper. A configuration block is slidably connected to the surface of the bolt. The configuration block is slidably connected between the two limit frames. A nut is threaded onto the surface of the bolt.

[0008] The above scheme utilizes a stepper motor to drive the first gear, which in turn rotates the rotating rod, enabling precise winding and unwinding of the take-up drum. A guide wheel guides the path of the pull rope, reducing friction and deviation. The take-up drum winds the pull rope, and the winding and unwinding control the drop hammer's height. An electric gripper holds the clamping block at the top of the drop hammer, allowing for automatic release upon power failure. The clamping block's hold ensures stable suspension of the drop hammer. A limit frame constrains the sliding path of the configuration block, preventing deviation. Bolts and nuts fix the position of the configuration block, adjusting the drop hammer's added mass. By adding or removing configuration blocks, the total mass of the drop hammer can be adjusted to meet different impact energy requirements.

[0009] Furthermore, two fixing boxes are fixedly connected to the top of the base plate on both opposite sides, and uprights are slidably connected inside the fixing boxes. The top ends of the two uprights are fixedly connected to the bottom of the top plate.

[0010] The above scheme allows for the connection of the top plate and the bottom plate by setting up uprights.

[0011] Furthermore, a transmission groove is provided inside the base plate, a fixed plate is fixedly connected inside the fixed box, a rotating shaft is tightly nested inside the fixed plate through a bearing, a threaded rod is fixedly connected to the top of the rotating shaft, a threaded cylinder is fixedly connected inside the upright, the top of the threaded rod is threadedly connected to the threaded cylinder, a rotary motor is fixedly connected to the bottom of the transmission groove, one of the rotating rods is fixedly connected to the output end of the rotary motor, and the other rotating rod is rotatably connected to the bottom of the transmission groove.

[0012] The above scheme allows for automated height adjustment of the top plate by setting up a rotary motor to drive the threaded rod to rotate. By setting up a rotary shaft and a threaded rod, the rotary motor can drive the threaded rod to rotate, which can push the upright to rise and fall. By setting up a threaded cylinder to mesh with the threaded rod, the rotational motion can be converted into the linear lifting and lowering of the upright.

[0013] Furthermore, both rotating rods are fixedly connected to transmission gears, and the surfaces of the two transmission gears are connected to a gear chain.

[0014] The above solution, by setting transmission gears and gear chains, can synchronize the movement of the rotating rods on both sides, ensuring symmetrical winding and unwinding of the winding drum and preventing the drop hammer from tilting.

[0015] Furthermore, a sliding roller is provided on the side of the limiting frame, and the sliding roller is slidably connected within the second sliding frame and the first sliding frame.

[0016] By using the above method, the frictional resistance during the lifting and lowering of the drop hammer can be reduced by having the sliding roller roll within the second sliding frame, thus ensuring smooth vertical movement.

[0017] Furthermore, a piezoelectric force sensor is fixedly connected inside the base plate, a placement cylinder is fixedly connected to the top of the U-shaped plate, the test piece is placed on top of the piezoelectric force sensor, and the steel ball is placed inside the placement cylinder.

[0018] The above scheme, by setting up a piezoelectric force sensor, can measure the dynamic force value of the test piece when it is impacted, providing quantitative data. By setting up a placement cylinder, the initial position of the steel ball can be fixed to ensure the accuracy of the impact point.

[0019] Furthermore, electric push rods are fixedly connected to both opposite sides inside the U-shaped plate, and a clamping plate is fixedly connected to one end of each electric push rod. A protective pad is fixedly connected to the side of the clamping plate.

[0020] The above scheme, by setting up an electric push rod and a clamping plate, can automatically clamp the test piece, and then, with the action of the protective pad, can prevent damage to the surface of the test piece.

[0021] Furthermore, a door is movably connected to the front of the protective shell, and support feet are fixedly connected to the four corners of the bottom of the base plate, with contact pads fixedly connected to the bottom of the support feet.

[0022] The above solution, by setting up support feet and contact pads, can stabilize the device and reduce the impact of test vibration on the measurement results.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This special impact testing device for concrete features a stepper motor that drives a first gear, which in turn rotates a rotating rod, enabling precise winding and unwinding of the take-up drum. A guide wheel guides the path of the pull rope, reducing friction and deviation. The take-up drum winds the pull rope, and the winding and unwinding control the height of the drop hammer. An electric gripper holds a clamping block at the top of the drop hammer, allowing for automatic release upon power failure. The clamping block ensures stable suspension of the drop hammer. A limit frame restricts the sliding path of the configuration block, preventing deviation. Bolts and nuts fix the position of the configuration block, adjusting the added mass of the drop hammer. By adding or removing configuration blocks, the total mass of the drop hammer can be adjusted to meet different impact energy requirements. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0026] Figure 2 This is a side-view perspective three-dimensional structural diagram of this application;

[0027] Figure 3 This is a schematic diagram of the configuration block structure in this application;

[0028] Figure 4 This is a schematic diagram of the structure in frontal cross-section in this application;

[0029] Figure 5 This is a schematic diagram of the sliding roller in this application.

[0030] In the picture:

[0031] 1. Base plate; 101. Fixing box; 102. Protective shell; 103. U-shaped plate; 104. Placement cylinder; 105. Through hole; 106. First sliding frame; 107. Upright pole; 108. Second sliding frame; 109. Top plate; 1010. Wire hole; 1011. Support plate; 1012. Guide wheel; 1013. Upright plate; 1014. Stepper motor; 1015. First gear; 1016. Rotating rod; 1017. Second gear; 1018. Rewinding drum 1019. Pull rope; 1020. Electric gripper; 1021. Electric push rod; 1022. Clamping plate; 1023. Protective pad; 1024. Threaded cylinder; 1025. Transmission groove; 1026. Rotary motor; 1027. Fixing plate; 1028. Rotating shaft; 1029. Threaded rod; 1030. Transmission gear; 1031. Gear chain; 1032. Piezoelectric force sensor; 1033. Support foot; 1034. Contact pad; 1035. Door body;

[0032] 2. Test specimens;

[0033] 3. Steel ball;

[0034] 4. Drop hammer; 401. Connecting plate; 402. Clamping block; 403. Limiting frame; 404. Sliding roller; 405. Bolt;

[0035] 5. Configuration block;

[0036] 6. Nuts. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Please see Figure 1 , Figure 2 and Figure 3 An impact testing device for special concrete in this embodiment includes a base plate 1, a test piece 2, a steel ball 3 and a drop hammer 4. A protective shell 102 and a U-shaped plate 103 are fixedly connected to the top of the base plate 1. A through hole 105 is opened on the top of the protective shell 102.

[0039] A first sliding frame 106 is fixedly connected to both opposite sides of the top of the U-shaped plate 103. A second sliding frame 108 is slidably connected inside the first sliding frame 106. A top plate 109 is fixedly connected to the top of the second sliding frame 108. A wire hole 1010 is opened on the top of the top plate 109. A stepper motor 1014, two support plates 1011, and two upright plates 1013 are fixedly connected to the top of the top plate 109. Two guide wheels 1012 are rotatably connected between the two support plates 1011 via pins. A rotating rod 1016 is tightly nested between the two support plates 1011 via bearings. The stepper motor... A first gear 1015 is fixedly connected to the output end of 1014. A second gear 1017 and a take-up drum 1018 are fixedly connected to the surface of the rotating rod 1016. The first gear 1015 and the second gear 1017 mesh with each other. A pull rope 1019 is wound inside the take-up drum 1018. One end of the pull rope 1019 passes through two guide wheels 1012 and a wire hole 1010, and is fixedly connected to an electric gripper 1020. A connecting plate 401 is fixedly connected to the top of the drop hammer 4. A clamping block 402, four limit frames 403, and two bolts 405 are fixedly connected to the top of the connecting plate 401. The holding block 402 is snapped into the electric gripper 1020. A configuration block 5 is slidably connected to the surface of the bolt 405, which is slidably connected between the two limit frames 403. A nut 6 is threaded onto the surface of the bolt 405. A stepper motor 1014 drives the first gear 1015, which in turn rotates the rotating rod 1016, enabling precise winding and unwinding of the take-up drum 1018. A guide wheel 1012 guides the path of the pull rope 1019, reducing friction and deviation. The take-up drum 1018 winds the pull rope 1019, and the winding and unwinding control the drop hammer. The lifting height of the hammer 4 is adjusted by setting an electric gripper 1020 to hold the gripping block 402 on the top of the hammer 4, thus enabling the hammer 4 to be gripped and released. It is automatically released when the power is off. The gripping block 402 held by the electric gripper 1020 ensures that the hammer 4 is stably suspended. The sliding path of the configuration block 5 is constrained by setting a limit frame 403 to prevent it from deviating. The position of the configuration block 5 can be fixed by setting bolts 405 and nuts 6, and the additional mass of the hammer 4 can be adjusted. By setting configuration blocks 5, the total mass of the hammer 4 can be adjusted by increasing or decreasing the number of configuration blocks 5 to adapt to different impact energy requirements.

[0040] Please see Figure 1 , Figure 2 and Figure 3Two fixed boxes 101 are fixedly connected to the top of the base plate 1 on opposite sides. Uprights 107 are slidably connected inside the fixed boxes 101. The top ends of the two uprights 107 are fixedly connected to the bottom of the top plate 109. The uprights 107 connect the top plate 109 and the base plate 1. A transmission groove 1025 is provided inside the base plate 1. A fixed plate 1027 is fixedly connected inside the fixed boxes 101. A rotating shaft 1028 is tightly nested inside the fixed plate 1027 via bearings. A threaded rod 1029 is fixedly connected to the top end of the rotating shaft 1028. A threaded cylinder 1024 is fixedly connected inside the uprights 107. The top end of the threaded rod 1029 is threaded into the threaded cylinder 1024. A rotary motor 1026 is fixedly connected to the bottom end of the transmission groove 1025. One rotating rod 1016 is fixedly connected to the bottom end of the rotary motor 1026, and the other rotating rod... The bottom end of rod 1016 is rotatably connected to the bottom end of transmission groove 1025. By setting a rotary motor 1026, threaded rod 1029 can be driven to rotate, realizing automatic height adjustment of top plate 109. By setting a rotating shaft 1028 and threaded rod 1029, the rotation of threaded rod 1029 driven by rotary motor 1026 can push upright 107 to rise and fall. By setting a threaded cylinder 1024 to mesh with threaded rod 1029, the rotational motion can be converted into linear rising and falling of upright 107. Transmission gears 1030 are fixedly connected to the surfaces of the two rotating rods 1016. Gear chains 1031 are driven to the surfaces of the two transmission gears 1030. By setting transmission gears 1030 and gear chains 1031, the movement of rotating rods 1016 on both sides can be synchronized, ensuring symmetrical winding and unwinding of winding drum 1018 and preventing drop hammer 4 from tilting.

[0041] Please see Figure 3 , Figure 4 and Figure 5A sliding roller 404 is provided on the side of the limiting frame 403. The sliding roller 404 is slidably connected within the second sliding frame 108 and the first sliding frame 106. By rolling within the second and second sliding frames 108, the frictional resistance of the drop hammer 4 during lifting and lowering can be reduced, ensuring smooth vertical movement. A piezoelectric force sensor 1032 is fixedly connected inside the base plate 1. A placement cylinder 104 is fixedly connected to the top of the U-shaped plate 103. The test piece 2 is placed on top of the piezoelectric force sensor 1032, and the steel ball 3 is placed inside the placement cylinder 104. By setting the piezoelectric force sensor 1032, the dynamic force value of the test piece 2 under impact can be measured, providing quantitative data. By setting the placement cylinder 104, the steel ball 3 can be fixed. Initially, to ensure accurate impact point, electric push rods 1021 are fixedly connected to both sides of the U-shaped plate 103. One end of the electric push rod 1021 is fixedly connected to a clamping plate 1022, and a protective pad 1023 is fixedly connected to the side of the clamping plate 1022. By setting the electric push rod 1021 and the clamping plate 1022, the test piece 2 can be automatically clamped. Then, under the action of the protective pad 1023, the surface of the test piece can be prevented from being damaged. The protective shell 102 is movably connected to a door 1035 on the front. Support feet 1033 are fixedly connected to the four corners of the bottom of the base plate 1. Contact pads 1034 are fixedly connected to the bottom of the support feet 1033. By setting the support feet 1033 and the contact pads 1034, the device can be stabilized and the influence of test vibration on the measurement results can be reduced.

[0042] In this embodiment, a stepper motor 1014 drives a first gear 1015, which in turn rotates a rotating rod 1016, enabling precise winding and unwinding of the take-up drum 1018. A guide wheel 1012 guides the path of the pull rope 1019, reducing friction and deviation. The take-up drum 1018 winds the pull rope 1019, and the lifting and lowering height of the drop hammer 4 can be controlled by winding and unwinding. An electric gripper 1020 clamps the gripping block 402 on the top of the drop hammer 4, enabling the gripping and release of the drop hammer 4. It automatically releases when power is off. The gripping of the clamping block 402 by the electric gripper 1020 ensures the stable suspension of the drop hammer 4. A limit frame 403 constrains the sliding path of the configuration block 5, preventing it from deviating. Bolts 405 and nuts 6 fix the position of the configuration block 5 and adjust the additional mass of the drop hammer 4. By adding or removing the number of configuration blocks 5, the total mass of the drop hammer 4 can be adjusted to meet different impact energy requirements.

[0043] The working principle of the above embodiment is as follows: In use, people open the door 1035, then place the test piece 2 on top of the piezoelectric force sensor 1032. Then, the two electric push rods 1021 operate, which can push the two clamping plates 1022 to clamp and stabilize the test piece 2. After stabilization, people place the steel ball 3 inside the placement cylinder 104, so that the bottom of the steel ball 3 overlaps the top of the test piece 2. After placement, the stepper motor 1014 operates, causing the first gear 1015 to rotate. Through the meshing of the first gear 1015 and the second gear 1017, It can drive the rotating rod 1016 and the winding drum 1018 to rotate, and can wind and retract the pull rope 1019 to pull the drop hammer 4 to rise. After rising to a suitable height, the electric clamp 1020 runs and can disengage the clamping block 402. After disengagement, the drop hammer 4 moves downward along the first sliding frame 106 and the second sliding frame 108, and can transmit the impact force to the test piece 2 through the steel ball 3. Then, under the action of the piezoelectric force sensor 1032, the peak impact force can be recorded in real time and a waveform diagram can be generated, replacing the traditional manual reading and improving the objectivity of the data.

[0044] When the height of the drop hammer 4 needs to be raised, the rotary motor 1026 runs, and through the transmission gear 1030 and the gear chain 1031, the two sets of rotating rods 1016 and threaded rods 1029 can be rotated, which can drive the threaded cylinder 1024 to move on the surface of the threaded rod 1029, and adjust the height of the top plate 109, thereby raising the height of the drop hammer 4.

[0045] When the weight of the drop hammer 4 needs to be adjusted, the configuration block 5 is passed through the surface of the bolt 405 and slidably connected between the two limit frames 403. Depending on the actual needs, one or more configuration blocks 5 are installed on the top of the connecting plate 401, so that the weight of the drop hammer 4 can be adjusted.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special concrete impact testing device, comprising a base plate (1), a test piece (2), a steel ball (3), and a drop hammer (4), characterized in that: The bottom plate (1) is fixedly connected to a protective shell (102) and a U-shaped plate (103) at the top, and the protective shell (102) has a through hole (105) at the top. The top of the U-shaped plate (103) is fixedly connected to two opposite sides of a first sliding frame (106). A second sliding frame (108) is slidably connected inside the first sliding frame (106). A top plate (109) is fixedly connected to the top of the second sliding frame (108). A wire hole (1010) is opened on the top of the top plate (109). A stepper motor (1014), two support plates (1011), and two upright plates (1013) are fixedly connected to the top of the top plate (109). Two guide wheels (1012) are rotatably connected between the two support plates (1011) through a pin shaft. A rotating rod (1016) is tightly nested between the two support plates (1011) through a bearing. A first gear (1015) is fixedly connected to the output end of the stepper motor (1014). A second gear (1015) is fixedly connected to the surface of the rotating rod (1016). 1017) and take-up drum (1018), the first gear (1015) meshes with the second gear (1017), the take-up drum (1018) is wound with a pull rope (1019), one end of the pull rope (1019) passes through two guide wheels (1012) and a wire hole (1010), and is fixedly connected to an electric gripper (1020), the top of the drop hammer (4) is fixedly connected to a connecting plate (401), the top of the connecting plate (401) is fixedly connected to a clamping block (402), four limit frames (403) and two bolts (405), the clamping block (402) is snapped into the electric gripper (1020), the surface of the bolt (405) is slidably connected to a configuration block (5), the configuration block (5) is slidably connected between two limit frames (403), and the surface of the bolt (405) is threadedly connected to a nut (6).

2. The impact testing device for special concrete according to claim 1, characterized in that: The bottom plate (1) has two fixed boxes (101) fixedly connected to the top of each other on both sides. The fixed boxes (101) have uprights (107) slidably connected inside. The top ends of the two uprights (107) are fixedly connected to the bottom of the top plate (109).

3. The impact testing device for special concrete according to claim 2, characterized in that: The base plate (1) has a transmission groove (1025) inside. The fixed box (101) is fixedly connected to a fixed plate (1027). The fixed plate (1027) has a rotating shaft (1028) tightly nested inside by a bearing. The top of the rotating shaft (1028) is fixedly connected to a threaded rod (1029). The upright (107) is fixedly connected to a threaded cylinder (1024). The top of the threaded rod (1029) is threadedly connected to the threaded cylinder (1024). The bottom of the transmission groove (1025) is fixedly connected to a rotary motor (1026). The bottom of one of the rotating rods (1016) is fixedly connected to the output end of the rotary motor (1026), and the bottom of the other rotating rod (1016) is rotatably connected to the bottom of the transmission groove (1025).

4. The impact testing device for special concrete according to claim 3, characterized in that: Both of the rotating rods (1016) are fixedly connected to the surface of a transmission gear (1030), and the two transmission gears (1030) are connected to the surface of a gear chain (1031).

5. The impact testing device for special concrete according to claim 1, characterized in that: The limiting frame (403) is provided with a sliding roller (404) on its side, and the sliding roller (404) is slidably connected in the second sliding frame (108) and the first sliding frame (106).

6. The impact testing device for special concrete according to claim 1, characterized in that: A piezoelectric force sensor (1032) is fixedly connected inside the base plate (1), and a placement cylinder (104) is fixedly connected to the top of the U-shaped plate (103). The test piece (2) is placed on top of the piezoelectric force sensor (1032), and the steel ball (3) is placed inside the placement cylinder (104).

7. The impact testing device for special concrete according to claim 1, characterized in that: Electric push rods (1021) are fixedly connected to both sides inside the U-shaped plate (103). A clamping plate (1022) is fixedly connected to one end of the electric push rod (1021), and a pad (1023) is fixedly connected to the side of the clamping plate (1022).

8. The impact testing device for special concrete according to claim 1, characterized in that: The protective shell (102) is movably connected to the door body (1035) on the front, and the bottom plate (1) is fixedly connected to the four corners of the bottom with support feet (1033), and the bottom of the support feet (1033) is fixedly connected to the contact pads (1034).

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