A road bridge concrete strength detection device

Abstract

This invention relates to a concrete strength testing device for roads and bridges, comprising a support frame for assisting rebound hammer testing, wherein a material receiving hopper is integrally formed at the bottom left end of the support frame; a positioning component mounted on the support frame; and a liquid softening component mounted on the support frame and connected to the positioning component. In use, this invention only requires aligning the left end face of the support frame with the testing surface and inserting the rebound hammer through the opening at the right end of the support frame. This allows for a series of operations to be completed simultaneously, including rebound hammer positioning, liquid softening of the testing surface, impurity scraping, and collection from the open hopper. No additional manual cleaning, positioning, or waste liquid recovery is required, significantly simplifying the testing process. Simultaneously, the positioning component ensures the accuracy of the rebound hammer's testing posture, and the scraping component, in conjunction with the liquid softening component, ensures the flatness of the testing surface, further effectively improving the reliability of the test data.

Description

Technical Field

[0001] This invention belongs to the field of concrete strength testing technology, and specifically relates to a concrete strength testing device for roads and bridges. Background Technology

[0002] In the field of road and bridge engineering quality inspection, concrete strength is a core indicator for assessing the safety and durability of a project. The rebound hammer, as a commonly used testing tool, directly impacts the judgment of concrete strength. However, several problems exist in actual testing: Firstly, the concrete testing surface of bridges often has impurities such as concrete debris, dust clumps, and slight cement paste adhering to it, resulting in an uneven surface and directly affecting the accuracy of the rebound hammer's data. Secondly, when operating the rebound hammer manually, it is difficult to ensure that the hammer remains perpendicular to the testing surface, easily leading to testing errors due to instrument tilt. Furthermore, manually cleaning impurities from the testing surface is inefficient, and the cleaned debris particles easily scatter, not only polluting the testing environment but also potentially affecting the test results of subsequent points. These problems make it difficult for the efficiency and accuracy of existing concrete strength testing work to meet the high standards required for engineering quality inspection.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete strength testing device for roads and bridges to solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A concrete strength testing device for roads and bridges includes a support frame for assisting rebound hammer testing, wherein a material receiving hopper is integrally formed at the bottom left end of the support frame; a positioning component mounted on the support frame; a liquid softening component mounted on the support frame and connected to the positioning component; a scraping component mounted at the opening at the left end of the support frame and connected to the positioning component; and an opening and closing component mounted on the inner bottom wall of the support frame and connected to the positioning component.

[0006] The positioning component is used to fit the rebound hammer with the insertion adapter and can position the rebound hammer, driving it to be perpendicular to the bridge detection surface during the detection process, so as to avoid skewness affecting the detection accuracy. The spray softening component is used to drive the test surface to be sprayed with anhydrous ethanol to soften the agglomerated particles on the outer wall of the bridge by means of the insertion of the rebound hammer and the function of the positioning component, so as to facilitate the rapid scraping and removal of the particles by the subsequent scraping component. The scraping component is also used to scrape off firmly attached concrete debris, dust clumps, and slight cement paste from the surface of the area to be tested by the insertion action of the rebound hammer and in conjunction with the positioning component, so as to avoid unevenness of the test surface and affect the test accuracy. The opening and closing mechanism allows the top opening of the receiving hopper to open when the rebound spring is inserted, so that scraped clumps can fall and be collected in the receiving hopper. When the rebound spring is pulled out, the top opening of the receiving hopper can be closed to prevent the particles inside from scattering or being poured out of the receiving hopper when the overall structure is moved.

[0007] Preferably, the vertical cross-section of the support frame is a square frame structure, and lightweight grooves are provided at the four corners on the outer side of the support frame.

[0008] Preferably, the vertical cross-section of the receiving hopper is a right-angled triangle structure. The left end face of the receiving hopper is flush with the left end face of the supporting frame. A blocking part is provided on the left side of the top of the receiving hopper, and a first guiding slope is provided on the blocking part. A drain port is provided at the bottom of the receiving hopper. The drain port is designed to discharge anhydrous ethanol and drive the collected waste liquid to discharge to another test point below the detection surface, so as to avoid the waste of anhydrous ethanol. This allows it to be used once and can also be recycled through the receiving hopper to soften the agglomerated particles at another test point below the detection point. The first guiding slope can drive the agglomerated particles during the scraping action of the scraping component to fall on its first guiding slope and, in conjunction with the spraying of anhydrous ethanol, smoothly fall into the receiving hopper.

[0009] Preferably, the positioning component includes through openings on all four sides of the outer side of the support frame, away from the left end opening of the support frame. A first positioning plate with a V-shaped vertical cross-section is integrally formed on the inner wall of the upper and lower through openings near the left end of the support frame. A second positioning plate is integrally formed on the inner wall of the front and rear through openings near the left end of the support frame. A first weakening groove is provided at the bends of the two first positioning plates and the two second positioning plates. When the rebound spring is inserted through the right end opening of the support frame, its outer circumference presses against the first and second positioning plates, compressing and deforming them through the first weakening groove, thereby limiting and fixing the rebound spring.

[0010] Preferably, the liquid softening component includes a liquid reservoir fixed to the inner top wall of the support frame. The bottom end of the liquid reservoir is fixed to the first positioning plate. The vertical cross-section of the liquid reservoir is hourglass-shaped. A reset spring with an hourglass-shaped vertical cross-section is fixed to the inner side of the liquid reservoir. The reset spring has a weak part at each of the two bends in the middle. A second weakening groove and a third weakening groove are provided on the upper and lower sides of the two weak parts at the inner corners of the reset spring. After the aforementioned rebound device is inserted through the opening at the right end of the support frame, the first positioning plate on it deforms through the first weakening groove and squeezes the liquid reservoir. Then, the reset spring undergoes compression deformation through the second weakening groove, the third weakening groove, and the weak part, storing potential energy for subsequent reset.

[0011] Preferably, a drain pipe is fixedly connected to the top outlet of the liquid storage bladder. The drain pipe is embedded inside the top of the support frame. One end of the drain pipe away from the liquid storage bladder extends to the left end opening of the support frame and is fixedly connected to a spray pipe. Multiple outlets at the bottom of the spray pipe are fixedly connected to nozzles. The bottom ends of the nozzles are inclined towards the center of the left end of the support frame. During the process of the liquid storage bladder being squeezed, the anhydrous ethanol stored inside is sprayed downwards through the drain pipe, the spray pipe, and the multiple nozzles to the center of the surface to be tested, i.e., the part to be tested by the rebound hammer.

[0012] Preferably, the scraping assembly includes two symmetrically arranged guide rods fixed to the inner wall of the left port of the support frame. Two symmetrically arranged scrapers are provided on the left side of the two guide rods. The scrapers are perpendicular to the guide rods. The scrapers are attached to the two guide rods by clamping parts. The left side wall of the two scrapers is flush with the left end face of the support frame and the left end face of the receiving hopper. A pushing and scraping inclined surface is provided on the side wall of the two scrapers facing away from each other.

[0013] Preferably, the clamping component includes two clamping plates with C-shaped vertical cross-sections. Each clamping plate has two symmetrically arranged first guide portions at its opening. The two first guide portions on the two clamping plates that are far apart are integrally formed on the right side wall of the scraper through an L-shaped cross-section connecting portion. Each clamping plate has a fourth weakening groove in the middle of its inner side. The arrangement of the first guide portions facilitates the clamping plate to actively and quickly assist in guiding the clamping plate to be fitted onto the outside of the guide rod when it is fitted onto the outside of the guide rod.

[0014] Preferably, a transmission rod is integrally formed on the middle of the right side wall of each scraper. A transmission channel is provided on the transmission rod. Two symmetrically arranged second guide parts are provided at the right end opening of the transmission channel. The transmission channel is movably sleeved on the outside of the transmission column. The bottom end of the transmission column is fixed to the second positioning plate. The inner width of the transmission channel is equal to the diameter of the transmission column. During the insertion of the rebound hammer, the two second positioning plates are driven to compress and deform through the first weakening groove. At the same time, with the action of the transmission column and the transmission channel, the two scrapers move away from each other, thereby scraping off the agglomerated particles on the surface to be tested. The inner width of the transmission channel is equal to the diameter of the transmission column to prevent the two scrapers from moving around.

[0015] Preferably, the opening and closing assembly includes a groove formed in the inner bottom wall of the supporting frame, a slider with an I-shaped vertical cross-section slidably connected in the groove, a movable plate fixed to the top of the slider, a push-pull plate with a Z-shaped vertical cross-section fixed to the top of the movable plate, the top of the push-pull plate fixed to the first positioning plate, a sixth weakening groove and a fifth weakening groove respectively formed at the upper and lower bends of the push-pull plate, a baffle fixed to the end of the movable plate away from the slider, the bottom end of the baffle sliding on the top of the receiving hopper, the front and rear side walls of the baffle slidingly abutting against the front and rear inner side walls of the supporting frame, the left end of the baffle abutting against the right side wall of the blocking part, a guide groove formed at the top of the baffle, a second guide slope formed in the bottom wall of the guide groove, the second guide slope, in conjunction with the first guide slope, can guide the collected agglomerated particles and anhydrous ethanol into the receiving hopper for collection.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The road and bridge concrete strength testing device provided by this invention includes a support frame, a positioning component, a liquid spraying softening component, a scraping component, and an opening and closing component. A receiving hopper is integrally formed at the bottom left end of the support frame, providing a foundation for the installation of each component and collecting impurities and waste liquid. The positioning component is installed on the support frame and positioned using the insertion and adaptation of a rebound hammer, ensuring that the rebound hammer is approximately perpendicular to the testing surface. The liquid spraying softening component is connected to the positioning component and, triggered by the insertion of the rebound hammer, sprays anhydrous ethanol onto the testing surface to soften agglomerated particles. The scraping component is installed at the opening at the left end of the support frame and connected to the positioning component, scraping away impurities from the testing surface when the rebound hammer is inserted. The opening and closing component is installed on the inner bottom wall of the support frame and connected to the positioning component, enabling automatic opening and closing of the top opening of the receiving hopper.

[0017] With the above structure, in use, this invention only requires the left end face of the support frame to be aligned with the test surface and the rebound hammer to be inserted through the right end opening of the support frame. This allows for a series of operations to be completed simultaneously, including rebound hammer positioning, liquid softening of the test surface, impurity scraping, and collection from the open hopper. No additional manual cleaning, positioning, or waste liquid recovery is required, significantly simplifying the testing process. Simultaneously, the positioning component ensures the accuracy of the rebound hammer's testing posture, while the scraping and softening components work together to ensure the flatness of the test surface, further improving the reliability of the test data. The design of the hopper and drain outlet enables centralized collection of impurities and secondary utilization of waste liquid, avoiding environmental pollution and reducing testing costs. Therefore, this road and bridge concrete strength testing device significantly improves the efficiency and accuracy of concrete strength testing and has the advantages of convenient operation, energy saving, and environmental protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the initial overall three-dimensional first-view structure of the auxiliary rebound device of the present invention during use; Figure 2 This is a schematic diagram of the overall three-dimensional second-view structure of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional third-view structure of the present invention; Figure 4 This is a schematic diagram of the overall three-dimensional fourth-view structure of the present invention; Figure 5 This is a schematic diagram of the three-dimensional unfolded structure of each component in the liquid spraying softening assembly after the support frame of the present invention has been cut open; Figure 6 This is a three-dimensional bottom view of the components on the push-pull plate of the present invention; Figure 7 This is a three-dimensional structural diagram of each component on the clamping part of the present invention; Figure 8 This is a top-view three-dimensional structural diagram of the discharge port in the receiving hopper of the present invention; Figure 9 This is the invention Figure 3 Enlarged structural diagram at point A in the middle; Explanation of key figure labels: 1. Rebound hammer; 11. Support frame; 12. Lightweight tank; 13. Receiving hopper; 131. Blocking part; 132. Drain outlet; 2. Positioning assembly; 21. Through-hole; 22. First positioning plate; 23. Second positioning plate; 24. First weakening tank; 3. Spray softening assembly; 31. Liquid storage bladder; 32. Reset spring; 33. Weak part; 34. Second weakening tank; 35. Third weakening tank; 36. Inlet pipe; 37. Drain pipe; 38. Spray pipe; 39. Nozzle; 4. Scraping assembly; 41. Guide rod; 42. Scraper; 421. Scraping ramp; 43. Clamping component; 431. Clamping plate; 432. Fourth weakening groove; 433. First guide part; 434. Connecting part; 44. Transmission rod; 441. Transmission channel; 442. Second guide part; 45. Transmission column; 5. Opening and closing assembly; 51. Baffle; 52. Moving plate; 53. Second guide ramp; 54. Slider; 55. Push-pull plate; 551. Fifth weakening groove; 552. Sixth weakening groove. Detailed Implementation

[0019] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] See attached document Figure 1-9A concrete strength testing device for roads and bridges includes a support frame 11 for assisting rebound hammer testing, with a material receiving hopper 13 integrally formed at the bottom left end of the support frame 11; a positioning component 2 installed on the support frame 11; a liquid spraying softening component 3 installed on the support frame 11 and connected to the positioning component 2; a scraping component 4 installed at the opening at the left end of the support frame 11 and connected to the positioning component 2; and an opening and closing component 5 installed on the inner bottom wall of the support frame 11 and connected to the positioning component 2.

[0023] The positioning component 2 is used to fit the rebound hammer 1 and can position the rebound hammer 1, driving the rebound hammer 1 to be perpendicular to the bridge detection surface during the detection process, so as to avoid skewness affecting the detection accuracy. The spray softening component 3 is used to drive the test surface of the bridge outer wall to be tested to be softened by spraying anhydrous ethanol with the rebound hammer 1 and in conjunction with the positioning component 2, so that the particles can be quickly scraped off by the subsequent scraping component 4. The scraping component 4 is also used to scrape off firmly attached concrete debris, dust clumps, and slight cement paste from the surface of the area to be tested by means of the insertion action of the rebound hammer 1 and in conjunction with the function of the positioning component 2, so as to avoid unevenness of the test surface and affect the test accuracy. The opening and closing component 5 can be used to open the top opening of the receiving hopper 13 by means of the insertion action of the rebound spring 1, and the agglomerated particles that are easy to scrape off can fall and be collected in the receiving hopper 13. When the rebound spring 1 is pulled out, it can close the top opening of the receiving hopper 13, so as to prevent the particles inside from scattering or pouring out of the receiving hopper 13 when the overall structure is transferred.

[0024] Furthermore, such as Figure 1-9 As shown, the vertical cross-section of the support frame 11 is a square frame structure, and lightweight grooves 12 are provided at the four corners on the outside of the support frame 11.

[0025] Furthermore, such as Figure 1-9As shown, the vertical cross-section of the receiving hopper 13 is a right-angled triangle structure. The left end face of the receiving hopper 13 is flush with the left end face of the supporting frame 11. A blocking part 131 is provided on the left side of the top of the receiving hopper 13. A first guiding slope is provided on the blocking part 131. A drain port 132 is provided at the bottom of the receiving hopper 13. The drain port 132 is designed to discharge anhydrous ethanol and drive the collected waste liquid to discharge to another test point below the detection surface, so as to avoid the waste of anhydrous ethanol. It can be used once and can also be recycled through the receiving hopper 13. It can also be used to soften the agglomerated particles at another test point below the detection point. The first guiding slope can drive the agglomerated particles during the scraping action of the scraping component 4 to fall on its first guiding slope and, with the help of the spraying of anhydrous ethanol, fall smoothly into the receiving hopper 13.

[0026] Furthermore, such as Figure 1-9 As shown, the positioning component 2 includes through openings 21 on all four sides of the outer side of the support frame 11, away from the left end opening of the support frame 11. The inner wall of the upper and lower through openings 21 near the left end of the support frame 11 is integrally formed with a first positioning plate 22 with a vertical cross-section of V-shape. The inner wall of the front and rear through openings 21 is integrally formed with a second positioning plate 23 near the left end of the support frame 11. The bends of the two first positioning plates 22 and the two second positioning plates 23 are provided with first weakening grooves 24. When the rebound spring 1 is inserted into the right end opening of the support frame 11, the outer circumference of the rebound spring 1 will press against the first positioning plate 22 and the second positioning plate 23 through the first weakening grooves 24 to compress and deform, thereby driving the rebound spring 1 to be limited and fixed.

[0027] Furthermore, such as Figure 1-9As shown, the liquid softening component 3 includes a liquid reservoir 31 fixed to the inner top wall of the support frame 11. The bottom end of the liquid reservoir 31 is fixed to the first positioning plate 22. The vertical cross-section of the liquid reservoir 31 is hourglass-shaped. A reset spring 32 with an hourglass-shaped vertical cross-section is fixed to the inner side of the liquid reservoir 31. The reset spring 32 has two weak points 33 at the two bends in the middle. The upper and lower sides of the two weak points 33 are provided with a second weakening groove 34 and a third weakening groove 35 at the inner corner of the reset spring 32. After the aforementioned rebound device 1 is inserted through the right end opening of the support frame 11, the first positioning plate 22 on it deforms through the first weakening groove 24 and squeezes the liquid reservoir 31. Then the reset spring passes through the second weakening groove 34 and the third weakening groove 35. The weakening groove 35 and the weak part 33 undergo compression deformation to store potential energy for subsequent reset. A drain pipe 37 is fixedly connected to the top outlet of the liquid storage bladder 31. The drain pipe 37 is embedded in the top inner side of the support frame 11. The end of the drain pipe 37 away from the liquid storage bladder 31 extends to the left end opening of the support frame 11 and is fixedly connected to a spray pipe 38. Multiple outlets at the bottom of the spray pipe 38 are fixedly connected to nozzles 39. The bottom end of the nozzles 39 is inclined towards the center of the left end of the support frame 11. During the process of the liquid storage bladder 31 being squeezed, the anhydrous ethanol stored inside is sprayed downwards through the drain pipe 37, the spray pipe 38 and multiple nozzles 39 to the center of the surface to be tested, that is, the part to be tested by the rebound hammer 1.

[0028] The top of the reservoir 31 is also fixed with an inlet pipe 36. The top of the inlet pipe 36 extends to the top of the support frame 11 and is threaded with a sealing cap. This design is to facilitate the addition of anhydrous ethanol.

[0029] Furthermore, such as Figure 1-9 As shown, the scraping assembly 4 includes two symmetrically arranged guide rods 41 fixed to the inner wall of the left port of the support frame 11. Two symmetrically arranged scrapers 42 are provided on the left side of the two guide rods 41. The scrapers 42 are vertically distributed with respect to the guide rods 41. The scrapers 42 are attached to the two guide rods 41 by clamping parts 43. The left side wall of the two scrapers 42 is flush with the left end face of the support frame 11 and the left end face of the receiving hopper 13. The two scrapers 42 are provided with a pushing and scraping inclined surface 421 on the side wall opposite to each other.

[0030] Furthermore, such as Figure 1-9As shown, the clamping component 43 includes two clamping plates 431, each with a C-shaped vertical cross-section. Each clamping plate 431 has two symmetrically arranged first guide portions 433 at its opening. The two far-away first guide portions 433 on the two clamping plates 431 are integrally formed onto the right side wall of the scraper 42 via an L-shaped connecting portion 434. A fourth weakening groove 432 is provided in the middle of the inner side of each clamping plate 431. The first guide portions 433 facilitate the active and rapid auxiliary guidance of the clamping plate 431 when it is fitted onto the outside of the guide rod 41. A transmission rod 44 is integrally formed in the middle of the right side wall of the scraper 42. A transmission channel 441 is provided on the transmission rod 44. Two symmetrically arranged second guide parts 442 are provided at the right end opening of the channel 441. The transmission channel 441 is movably sleeved on the outside of the transmission column 45. The bottom end of the transmission column 45 is fixed to the second positioning plate 23. The inner width of the transmission channel 441 is equal to the diameter of the transmission column 45. During the insertion of the rebound hammer 1, the two second positioning plates 23 are driven to compress and deform through the first weakening groove 24 respectively. At the same time, in conjunction with the action of the transmission column 45 and the transmission channel 441, the two scrapers 42 move away from each other, so that the agglomerated particles on the surface to be tested can be scraped off. The inner width of the transmission channel 441 is equal to the diameter of the transmission column 45 to avoid the phenomenon of the two scrapers 42 moving around.

[0031] The inner walls of the guide rod 41 and its clamping plate 431 are polished smooth to reduce the coefficient of friction, ensuring that the clamping plate 431 can slide smoothly on the outside of the guide rod 41.

[0032] Furthermore, such as Figure 1-9 As shown, the opening and closing assembly 5 includes a groove formed in the inner bottom wall of the supporting frame 11. A slider 54 with an I-shaped vertical cross-section is slidably connected in the groove. A movable plate 52 is fixed to the top of the slider 54. A push-pull plate 55 with a Z-shaped vertical cross-section is fixed to the top of the movable plate 52. The top of the push-pull plate 55 is fixed to the first positioning plate 22. A sixth weakening groove 552 and a fifth weakening groove 551 are respectively formed at the upper and lower bends of the push-pull plate 55. The end of the movable plate 52 away from the slider 54 A baffle 51 is fixedly connected, and the bottom end of the baffle 51 slides on the top of the receiving hopper 13. The front and rear side walls of the baffle 51 are slidably attached to the front and rear inner walls of the support frame 11. The left end of the baffle 51 is attached to the right side wall of the blocking part 131. A guide groove is provided on the top of the baffle 51, and a second guide slope 53 is provided on the bottom wall of the guide groove. The second guide slope 53, in conjunction with the first guide slope, can guide the collected agglomerated particles and anhydrous ethanol to the receiving hopper 13 for collection.

[0033] In actual use, the left end of the support frame 11 is attached to the bridge inspection surface, and the rebound hammer 1 is inserted through the opening at the right end of the support frame 11. The outer circumference of the rebound hammer 1 presses against the first positioning plate 22 and the second positioning plate 23 in the positioning component 2, causing the two to undergo compression deformation through the first weakening groove 24, thereby limiting and fixing the rebound hammer 1 to ensure that it is perpendicular to the inspection surface. At the same time, the deformation of the first positioning plate 22 and the second positioning plate 23 becomes the action trigger signal for the liquid spraying softening component 3, the scraping component 4, and the opening and closing component 5. Secondly, when the first positioning plate 22 deforms, it squeezes the liquid storage bladder 31. The reset spring 32 inside the liquid storage bladder 31 is simultaneously compressed and deformed through the second weakening groove 34, the third weakening groove 35 and the weak part 33 and stores potential energy. Under the squeezing action, the anhydrous ethanol in the liquid storage bladder 31 is transported to multiple nozzles 39 through the drain pipe 37 and the spray pipe 38. The nozzles 39 spray anhydrous ethanol at an angle toward the detection area at the center of the left end of the support frame 11 to soften the agglomerated particles on the detection surface. Simultaneously, when the second positioning plate 23 deforms, it drives the transmission column 45 to move. The transmission column 45 pushes the transmission rod 44 through the transmission channel 441, causing the two scrapers 42 to move away from each other along the guide rod 41. The scraping slope 421 of the scraper 42 contacts the inspection surface, scraping away the softened concrete debris, lumps and other impurities, thus achieving a smooth surface treatment for the inspection surface. Furthermore, when the first positioning plate 22 deforms, it pushes the moving plate 52 through the push-pull plate 55. The moving plate 52 drives the baffle 51 to slide to the right along the top of the receiving hopper 13, so that the top opening of the receiving hopper 13 is open. The scraped impurities fall into the receiving hopper 13 under the guidance of the push-scraping inclined surface 421 and the first guiding inclined surface. At the same time, the anhydrous ethanol waste liquid after spraying is collected into the receiving hopper 13 through the second guiding inclined surface 53. Some of the waste liquid can be discharged through the drain port 132 to the test point below, realizing secondary utilization.

[0034] Finally, after the test is completed, the rebound hammer 1 is pulled out. The first positioning plate 22 and the second positioning plate 23 in the positioning assembly 2 return to their original state under the action of their own elasticity and the potential energy release of the reset spring 32, which drives the liquid storage bladder 31, scraper 42 and baffle 51 to reset synchronously. The baffle 51 re-closes the top opening of the receiving hopper 13 to prevent internal impurities and residual waste liquid from scattering during the transfer of the device, which facilitates the operation of the next test point.

[0035] In summary, it is worth noting that the positioning component 2, the liquid spraying softening component 3, the scraping component 4, and the opening and closing component 5 are all integrally molded and assembled through injection molding or splicing. In addition, the scraper 42 can be replaced after a long period of use. The scraper 42 can be pulled directly to drive the clamping plate 431 to detach directly from its guide rod 41. In addition, the transmission channel 441 on the transmission rod 44 will also detach from the transmission column 45, so that the scraper 42 can be replaced separately without the need for overall replacement, which greatly reduces the replacement cost.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. 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 invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A concrete strength testing device for roads and bridges, comprising a support frame for assisting rebound hammer testing, characterized in that, The bottom left end of the supporting frame is integrally formed with a material receiving hopper; A positioning component, which is mounted on the support frame; A liquid softening assembly is mounted on the support frame and connected to the positioning assembly. A scraping assembly is installed at the left end opening of the support frame and is connected to the positioning assembly; An opening and closing assembly is installed on the inner bottom wall of the support frame and is connected to the positioning assembly.

2. The road and bridge concrete strength testing device according to claim 1, characterized in that, The vertical cross-section of the support frame is a square frame structure, and lightweight grooves are provided at the four corners on the outside of the support frame.

3. The road and bridge concrete strength testing device according to claim 1, characterized in that, The vertical cross-section of the receiving hopper is a right-angled triangle structure. The left end face of the receiving hopper is flush with the left end face of the supporting frame. A blocking part is provided on the left side of the top of the receiving hopper. A first guiding inclined surface is provided on the blocking part. A drain port is provided at the bottom of the receiving hopper.

4. The road and bridge concrete strength testing device according to claim 2, characterized in that, The positioning component includes through openings on all four sides of the outer side of the support frame, away from the opening at the left end of the support frame. A first positioning plate with a V-shaped vertical cross-section is integrally formed on the inner wall of the upper and lower through openings near the left end of the support frame. A second positioning plate is integrally formed on the inner wall of the front and rear through openings near the left end of the support frame. A first weakening groove is provided at the bend of the two first positioning plates and the two second positioning plates.

5. The road and bridge concrete strength testing device according to claim 4, characterized in that, The liquid softening component includes a liquid reservoir fixed to the inner top wall of the support frame. The bottom end of the liquid reservoir is fixed to the first positioning plate. The vertical cross-section of the liquid reservoir is hourglass-shaped. A reset spring with an hourglass-shaped vertical cross-section is fixed to the inner side of the liquid reservoir. The reset spring has a weak part at each of the two bends in the middle. A second weakening groove and a third weakening groove are provided on the upper and lower sides of the two weak parts at the inner corners of the reset spring.

6. The concrete strength testing device for roads and bridges according to claim 5, characterized in that, A drain pipe is fixedly connected to the top outlet of the liquid storage bladder. The drain pipe is embedded inside the top of the support frame. One end of the drain pipe away from the liquid storage bladder extends to the left end opening of the support frame and is fixedly connected to a spray pipe. Multiple outlets at the bottom of the spray pipe are fixedly connected to nozzles. The bottom end of the nozzle is inclined towards the center of the left end of the support frame.

7. The road and bridge concrete strength testing device according to claim 4, characterized in that, The scraping assembly includes two symmetrically arranged guide rods fixed to the inner wall of the left port of the support frame. Two symmetrically arranged scrapers are provided on the left side of the two guide rods. The scrapers are perpendicular to the guide rods. The scrapers are attached to the two guide rods by clamping parts. The two scrapers are provided with a pushing and scraping slope on the side wall opposite to each other.

8. The road and bridge concrete strength testing device according to claim 7, characterized in that, The clamping component includes two clamping plates with C-shaped vertical cross sections. Each clamping plate has two symmetrically arranged first guide parts at its opening. The two first guide parts on the two clamping plates that are far apart are integrally formed on the right side wall of the scraper through an L-shaped cross section connecting part. A fourth weakening groove is opened in the middle of the inner side of each clamping plate.

9. A road and bridge concrete strength testing device according to claim 8, characterized in that, The right side wall of the scraper is integrally formed with a transmission rod, and the transmission rod is provided with a transmission channel. The right end opening of the transmission channel is provided with two symmetrically arranged second guide parts. The transmission channel is movably sleeved on the outside of the transmission column, and the bottom end of the transmission column is fixed to the second positioning plate.

10. A road and bridge concrete strength testing device according to claim 4, characterized in that, The opening and closing assembly includes a sliding groove formed in the inner bottom wall of the supporting frame. A slider is slidably connected in the sliding groove. A movable plate is fixed to the top of the slider. A push-pull plate with a Z-shaped vertical cross-section is fixed to the top of the movable plate. The top of the push-pull plate is fixed to the first positioning plate. A sixth weakening groove and a fifth weakening groove are respectively formed at the upper and lower bends of the push-pull plate. A baffle is fixed to the end of the movable plate away from the slider. A guide groove is formed at the top of the baffle. A second guide slope is formed in the bottom wall of the guide groove.

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