Compressive strength detection device for autoclaved aerated concrete block

Abstract

The invention belongs to the field of concrete detection, and provides a compressive strength detection device for autoclaved aerated concrete blocks, the compressive strength detection device comprises a bottom plate, a portal frame is fixedly connected to the bottom plate, a telescopic rod is fixedly mounted on the portal frame, and a pressing plate is fixedly connected to the movable end, close to the bottom plate, of the telescopic rod; a plurality of guide columns are fixedly connected to the bottom of the pressing plate, and a placing outer frame is slidably mounted among the multiple guide columns. Through the arrangement of the placing outer frame, the movable placing plate, the pressing plate, the guide column, the blocking table and the blocking block, after detection is completed, the telescopic rod drives the placing outer frame to ascend through the guide column, and the movable placing plate can anticlockwise rotate relative to the placing outer frame, so that an opening is formed between the movable placing plate and the placing outer frame; the concrete fragments slide into the collecting cavity from the opening to clean the concrete on the movable placing plate, so that the time for cleaning the concrete fragments is saved, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of concrete detection, and particularly relates to a compressive strength detection device for autoclaved aerated concrete blocks. Background Art

[0002] Autoclaved aerated concrete blocks are made of fly ash, lime, cement, gypsum, slag, etc. as the main raw materials, added with appropriate foaming agents, regulators, and bubble stabilizers, and are made through processes such as batching and stirring, pouring, static stopping, cutting, and high-pressure steam curing. The unit volume weight of autoclaved aerated concrete blocks is one-third of that of clay bricks, the heat insulation performance is 3-4 times that of clay bricks, the sound insulation performance is 2 times that of clay bricks, the anti-seepage performance is more than one time that of clay bricks, and the fire resistance performance is 6-8 times that of reinforced concrete. The construction characteristics of autoclaved aerated concrete blocks are also very excellent. Also, due to their relatively large volume, the construction speed is relatively fast, and they can be used as filling materials for general buildings;

[0003] At present, after the production of autoclaved aerated concrete blocks is completed, spot checks will be carried out on them to detect whether their compressive strength is qualified. In the prior art, the compressive strength detection of autoclaved aerated concrete blocks is usually completed using a press.

[0004] Since the pressure applied to the autoclaved aerated concrete block during the test will cause the autoclaved aerated concrete block to break, and then produce fragments, and the fragments will scatter onto the load-bearing detection component, affecting the subsequent detection of other autoclaved aerated concrete blocks, and cleaning the load-bearing detection component will consume a certain amount of time, resulting in a reduction in detection efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a compressive strength detection device for autoclaved aerated concrete blocks, aiming to solve the technical problem of low detection efficiency caused by cleaning concrete fragments in the prior art.

[0006] The present invention is realized as follows. A compressive strength detection device for autoclaved aerated concrete blocks includes a bottom plate. A gantry is fixedly connected to the bottom plate. A telescopic rod is fixedly installed on the gantry. A pressing plate is fixedly connected to the movable end of the telescopic rod close to the bottom plate. A plurality of guide columns are fixedly connected to the bottom of the pressing plate. A placement outer frame is slidably installed between the plurality of guide columns. Limiting stop pieces are fixedly connected to one ends of the plurality of guide columns passing through the placement outer frame. An active placement plate is rotatably installed inside the placement outer frame through a fixed shaft. The length and width of the active placement plate are respectively greater than the length and width of the concrete block. A limiting rod is fixedly connected to the bottom of the placement outer frame. The limiting rod is used to limit the angle between the active placement plate and the placement outer frame to prevent the active placement plate from rotating too much;

[0007] A protective box is fixedly installed on the bottom plate. The protective box is located directly below the placement outer frame. A collection cavity is formed on the side of the protective box. The distance from the top of the collection cavity to the upper surface of the protective box is greater than the thickness of the concrete block, so that the concrete block can be completely immersed in the protective box to prevent the concrete block from splashing. A blocking platform is fixedly connected inside the protective box through a fixing rod. A plurality of blocking blocks are fixedly connected to the inner side of the protective box. The tops of the blocking blocks and the top of the blocking platform are in the same horizontal plane, and the distance from the end of the blocking block to the inner wall of the bottom plate is less than the distance from the side of the movable placement plate to the inner wall of the bottom plate, so that after the placement outer frame contacts the blocking block, the movable placement plate can rotate freely without being blocked by the blocking block;

[0008] A limiting mechanism is installed on the placement outer frame. The output end of the limiting mechanism abuts against the movable placement plate. The limiting mechanism is used to prevent the movable placement plate from rotating downward. Initially, the surfaces of the movable placement plate and the placement outer frame are flush. The limiting mechanism includes an unlocking mechanism. The unlocking mechanism is installed on the bottom plate. One end of the unlocking mechanism is connected to the output end of the limiting mechanism. When the movable placement plate moves downward and abuts against the top of the blocking platform, the unlocking mechanism is used to release the limit of the output end of the limiting mechanism on the movable placement plate, so that the movable placement plate can rotate freely to allow the concrete slag to slide into the collection cavity through the gap between the movable placement plate and the placement outer frame;

[0009] A reset mechanism is installed on the bottom plate. One end of the reset mechanism is connected to the fixed shaft of the movable placement plate. When the movable placement plate contacts the limiting rod and the placement outer frame drives the movable placement plate to rise, the reset mechanism is used to drive the movable placement plate to rotate above the placement outer frame and return it to its original position.

[0010] Further technical solution: When the movable placement plate contacts the end of the limiting rod, the angle range between the movable placement plate and the placement outer frame is 40° - 60°.

[0011] Further technical solution: The blocking platform is a frustum of a cone.

[0012] Further technical solution: the limiting mechanism includes a second mounting groove provided on the side of the placement outer frame near the movable placement plate, the second mounting groove is internally slidably connected to a limiting tongue, the side of the limiting tongue away from one end of the movable placement plate is connected with a second compression spring between the second mounting groove, the bottom of the end of the limiting tongue near the movable placement plate is provided with an inclined surface, the bottom of the side of the movable placement plate near the limiting tongue is provided with a limiting slot matched with the limiting tongue, one end of the limiting tongue is inserted into the limiting slot and abuts against the inner top of the limiting slot, the limiting tongue prevents the movable placement plate from rotating downward, initially, the distance from the top of the limiting tongue to the upper surface of the placement outer frame is equal to the distance from the inner top of the limiting slot to the upper surface of the movable placement plate, so that the upper surface of the movable placement plate is flush with the upper surface of the placement outer frame;

[0013] One end of the unlocking mechanism is connected to the limiting tongue.

[0014] Further technical solution: the unlocking mechanism comprises a rotating rod rotatably mounted on the placement outer frame, the end of the rotating rod close to the limiting tongue is fixedly connected to a driving gear, a circular groove matching the driving gear is provided on the placement outer frame, a driving rack is fixedly connected to the bottom of the limiting tongue, the driving gear and the driving rack are meshed and connected, the end of the rotating rod extending out of the placement outer frame is fixedly connected to a retraction gear, and a second groove for the retraction gear to move is provided on the bottom plate;

[0015] The unlocking mechanism also includes a retractable rack, a third mounting groove is opened on the side of the second groove, the retractable rack is installed inside the third mounting groove, and the retractable gear can engage with the third mounting groove. When the movable placement plate contacts the top of the blocking platform, the retractable gear is in an engaged state with the third mounting groove, and the limiting tongue is completely retracted into the second mounting groove, thereby releasing the restriction of the limiting tongue on the movable placement plate.

[0016] Further technical solution: the retracting rack is slidably installed inside the third installation groove, and a third compression spring is connected between the retracting rack and the third installation groove, and the elastic coefficient of the third compression spring is greater than the elastic coefficient of the second compression spring.

[0017] Further technical solution: The length of the second mounting groove is greater than the length of the limiting tongue, and when the movable placement plate abuts against the blocking platform, a gap is left between the end of the limiting tongue close to the movable placement plate and the end of the second mounting groove, and the gap is 5mm to 10mm long.

[0018] Further technical solution: The reset mechanism includes a reset gear and a reset rack. The reset gear is fixedly connected to the fixed shaft of the movable placement plate. A reduction gear is rotatably connected to the side surface of the placement outer frame. The reduction gear is meshed with the reset gear. A first groove for the reset gear and the reduction gear to move is formed on the side surface of the bottom plate. A first installation groove is formed on the side wall of the first groove. The reset rack is slidably connected to the inside of the first installation groove. A first compression spring is connected between the reset rack and the first installation groove. The reset rack can be meshed with the reduction gear. The distance from the top of the reset rack to the top of the protection box is greater than the distance from the axis of the reset gear to the upper surface of the placement outer frame. The rotation range of the movable placement plate is -60° to 70°;

[0019] In order to enable the movable placement plate to be smoothly rotated above the placement outer frame, the component of the elastic force of the first compression spring on the reduction gear in the vertical direction is greater than the gravity of the movable placement plate, and the elastic coefficient of the first compression spring is greater than the elastic coefficient of the second compression spring;

[0020] In order to enable the movable placement plate to be blocked by the limit tongue, the top of the retraction rack is lower than the bottom of the reset rack.

[0021] Further technical solution: The diameter of the reduction gear is smaller than the diameter of the reset gear, and the diameter ratio of the reduction gear to the reset gear is 1:(2 - 3).

[0022] Further technical solution: A collection drawer is arranged in the collection cavity.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In the present invention, by setting the placement outer frame, the movable placement plate, the pressing plate, the guide column, the blocking platform and the blocking block, the placement outer frame is placed on the blocking block, and the movable placement plate is placed on the blocking platform. The concrete block is placed on the movable placement plate, and the telescopic rod drives the pressing plate to perform the compressive strength test on it. After the test is completed, the telescopic rod drives the placement outer frame to rise through the guide column, and the movable placement plate will rotate counterclockwise relative to the placement outer frame, so that an opening is opened between the movable placement plate and the placement outer frame, and the concrete fragments slide into the collection cavity from the opening to clean the concrete on the movable placement plate, saving the time for cleaning the concrete fragments and improving the detection efficiency;

[0025] 2. In the present invention, by setting the limiting mechanism, the limiting mechanism can limit the movable placement plate to make the surfaces of the placement outer frame and the movable placement plate flat, which is convenient for placing the concrete block. And through the setting of the unlocking mechanism, when the movable placement plate approaches the blocking platform, the restriction on the movable placement plate is released, so that it can automatically open the opening when rising, which is convenient for cleaning the concrete fragments and is more convenient to use;

[0026] 3. In the present invention, by connecting a third compression spring between the retraction rack and the third installation groove, after the limit tongue moves to the limit, the retraction gear squeezes the retraction rack, and the retraction rack retracts into the third installation groove, so that the retraction gear can pass through smoothly, avoiding jamming of the entire device, protecting the limit mechanism, and at the same time increasing the manufacturing and installation error tolerance of the retraction rack;

[0027] 4. In the present invention, by providing a reset mechanism, when the movable placement plate opens the opening and moves upward, the reset mechanism can automatically reset the movable placement plate without manual reset, facilitating the next detection, saving time, and making the device more convenient to use;

[0028] 5. In the present invention, by providing a reduction gear and making the diameter ratio of the reduction gear to the reset gear 1:(2 - 3), the rotation speed of the movable placement plate is reduced, the control accuracy of the movable placement plate is improved, and excessive rotation of the movable placement plate is avoided, thereby preventing the situation where the movable placement plate cannot return to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall front view structural schematic diagram of the present invention.

[0030] Figure 2 is the top view structural schematic diagram of the protective box in the present invention.

[0031] Figure 3 is the structural schematic diagram of the overall side view cross-section of the present invention.

[0032] Figure 4 is the structural schematic diagram of the overall side view partial cross-section of the present invention.

[0033] Figure 5 In the present invention Figure 4 is the enlarged schematic diagram at B in

[0034] Figure 6 In the present invention Figure 4 is the enlarged schematic diagram at C in

[0035] Figure 7 is the structural schematic diagram of the side view cross-section of the placement outer frame and the movable placement plate in the present invention.

[0036] Figure 8 In the present invention Figure 7 is the enlarged schematic diagram at A in

[0037] In the attached drawings: 1. Bottom plate; 2. Collection drawer; 3. Protection box; 4. Gantry; 5. Guide post; 6. Pressing plate; 7. Telescopic rod; 8. Placing outer frame; 9. Movable placing plate; 10. Collection cavity; 11. Fixed rod; 12. Blocking platform; 13. Blocking block; 14. First groove; 15. Second groove; 16. Limit retaining piece; 17. Reset mechanism; 171. Reduction gear; 172. Reset gear; 173. Reset rack; 174. First installation groove; 175. First compression spring; 18. Limit rod; 19. Limit mechanism; 191. Second installation groove; 192. Second compression spring; 193. Driving gear; 194. Circular groove; 195. Driving rack; 196. Limit tongue; 197. Inclined plane; 198. Limit card slot; 199. Rotating rod; 1910. Retracting gear; 1911. Retracting rack; 1912. Third compression spring; 1913. Third installation groove. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The following describes in detail the specific implementation of the present invention with reference to specific embodiments.

[0040] As Figures 1-8 shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention includes a bottom plate 1, a gantry 4 is fixedly connected to the bottom plate 1, a telescopic rod 7 is fixedly installed on the gantry 4, a pressing plate 6 is fixedly connected to the movable end of the telescopic rod 7 close to the bottom plate 1, a plurality of guide posts 5 are fixedly connected to the bottom of the pressing plate 6, a placing outer frame 8 is slidably installed between the plurality of guide posts 5, limit retaining pieces 16 are fixedly connected to one ends of the plurality of guide posts 5 passing through the placing outer frame 8, a movable placing plate 9 is rotatably installed inside the placing outer frame 8 through a fixed shaft, the length and width of the movable placing plate 9 are respectively greater than the length and width of the concrete block, and a limit rod 18 is fixedly connected to the bottom of the placing outer frame 8. The limit rod 18 is used to limit the angle between the movable placing plate 9 and the placing outer frame 8 to prevent the movable placing plate 9 from rotating too much;

[0041] A protective box 3 is fixedly installed on the bottom plate 1. The protective box 3 is located directly below the placing outer frame 8. A collection cavity 10 is formed on the side of the protective box 3. The distance from the top of the collection cavity 10 to the upper surface of the protective box 3 is greater than the thickness of the concrete block, so that the concrete block can be completely immersed in the protective box 3 to prevent the concrete block from splashing. A blocking platform 12 is fixedly connected inside the protective box 3 through a fixing rod 11. A plurality of blocking blocks 13 are fixedly connected to the inner side surface of the protective box 3. The tops of the blocking blocks 13 and the top of the blocking platform 12 are on the same horizontal plane, and the distance from the end of the blocking block 13 to the inner wall of the bottom plate 1 is less than the distance from the side surface of the movable placing plate 9 to the inner wall of the bottom plate 1, so that after the placing outer frame 8 contacts the blocking block 13, the movable placing plate 9 can rotate freely without being blocked by the blocking block 13;

[0042] A limiting mechanism 19 is installed on the placing outer frame 8. The output end of the limiting mechanism 19 abuts against the movable placing plate 9. The limiting mechanism 19 is used to prevent the movable placing plate 9 from rotating downward. Initially, the surfaces of the movable placing plate 9 and the placing outer frame 8 are flush. The limiting mechanism 19 includes an unlocking mechanism. The unlocking mechanism is installed on the bottom plate 1. One end of the unlocking mechanism is connected to the output end of the limiting mechanism 19. When the movable placing plate 9 moves downward and abuts against the top of the blocking platform 12, the unlocking mechanism is used to release the limitation of the output end of the limiting mechanism 19 on the movable placing plate 9, so that the movable placing plate 9 can rotate freely, so that the concrete debris can slide into the collection cavity 10 through the gap between the movable placing plate 9 and the placing outer frame 8;

[0043] A reset mechanism 17 is installed on the bottom plate 1. One end of the reset mechanism 17 is connected to the fixed shaft of the movable placing plate 9. When the movable placing plate 9 contacts the limiting rod 18 and the placing outer frame 8 drives the movable placing plate 9 to rise, the reset mechanism 17 is used to drive the movable placing plate 9 to rotate above the placing outer frame 8 and return it to its original position.

[0044] Initially, the upper surface of the placing outer frame 8 is made flush with the upper surface of the protective box 3. Then, the concrete block is placed on the movable placing plate 9. The telescopic rod 7 drives the pressing plate 6 and the guiding column 5 to descend. The placing outer frame 8 follows the guiding column 5 to descend. When the placing outer frame 8 lands on the blocking block 13, the movable placing plate 9 also lands on the blocking platform 12. At the same time, the limiting mechanism 19 releases the restriction on the movable placing plate 9. Then, the telescopic rod 7 continues to drive the pressing plate 6 to descend, and the pressing plate 6 performs a compressive test on the concrete block;

[0045] After the detection is completed, the telescopic rod 7 drives the placement outer frame 8 to rise through the pressure plate 6 and the guide column 5. Since the limit mechanism 19 releases the limit on the movable placement plate 9, the movable placement plate 9 will rotate counterclockwise relative to the placement outer frame 8, so that an opening is opened between the movable placement plate 9 and the placement outer frame 8, and the concrete fragments slide from the opening into the collection chamber 10 to clean the concrete on the movable placement plate 9;

[0046] As the placement outer frame 8 rises, the reset mechanism 17 will drive the movable placement plate 9 back to its original position for the next detection, thereby saving time for cleaning concrete fragments and improving detection efficiency.

[0047] like Figure 7 As shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention is provided. In this embodiment, when the movable placement plate 9 contacts the end of the limiting rod 18, the angle between the movable placement plate 9 and the placement outer frame 8 is in the range of 40° to 60°.

[0048] like Figures 2-3 As shown, a compressive strength testing device for autoclaved aerated concrete blocks provided by the present invention is provided. In order to prevent concrete debris from falling onto the top of the blocking platform 12 and affecting the next test, in this embodiment, the blocking platform 12 is a round table.

[0049] like Figures 3-5 and Figures 7-8 As shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention is provided. In this embodiment, the limiting mechanism 19 includes a second mounting groove 191 provided on the side of the placement outer frame 8 close to the movable placement plate 9, and the interior of the second mounting groove 191 is slidably connected to a limiting tongue 196, and a second compression spring 192 is connected between the side of the limiting tongue 196 away from one end of the movable placement plate 9 and the second mounting groove 191, and an inclined surface 197 is provided at the bottom of the end of the limiting tongue 196 close to the movable placement plate 9. The movable placement plate 9 is provided with a limiting slot 198 matched with the limiting tongue 196 at the bottom of the side surface close to the limiting tongue 196. One end of the limiting tongue 196 is inserted into the limiting slot 198 and abuts against the inner top of the limiting slot 198. The limiting tongue 196 prevents the movable placement plate 9 from rotating downward. Initially, the distance from the top of the limiting tongue 196 to the upper surface of the placement outer frame 8 is equal to the distance from the inner top of the limiting slot 198 to the upper surface of the movable placement plate 9, so that the upper surface of the movable placement plate 9 is flush with the upper surface of the placement outer frame 8.

[0050] One end of the unlocking mechanism is connected to the limiting tongue 196 .

[0051] like Figures 3-5 and Figures 7-8As shown in the figure, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention is presented. In this embodiment, the unlocking mechanism includes a rotating rod 199 rotatably installed on the placement outer frame 8. One end of the rotating rod 199 close to the limit tongue 196 is fixedly connected to a driving gear 193. A circular groove 194 adapted to the driving gear 193 is formed on the placement outer frame 8. The bottom of the limit tongue 196 is fixedly connected to a driving rack 195. The driving gear 193 and the driving rack 195 are meshed. One end of the rotating rod 199 extending out of the placement outer frame 8 is fixedly connected to a retraction gear 1910. A second groove 15 for the retraction gear 1910 to move is formed on the bottom plate 1.

[0052] The unlocking mechanism further includes a retraction rack 1911. A third installation groove 1913 is formed on the side of the second groove 15. The retraction rack 1911 is installed inside the third installation groove 1913. The retraction gear 1910 can be meshed with the third installation groove 1913. When the movable placement plate 9 contacts the top of the blocking platform 12, the retraction gear 1910 and the third installation groove 1913 are in a meshed state, and the limit tongue 196 is completely retracted into the second installation groove 191, thus releasing the restriction of the limit tongue 196 on the movable placement plate 9.

[0053] When the telescopic rod 7 drives the pressure plate 6 and the placement outer frame 8 to descend, the placement outer frame 8 drives the movable placement plate 9 to descend. When the retraction gear 1910 encounters the retraction rack 1911 and meshes with the retraction rack 1911, since the retraction rack 1911 is blocked by the third installation groove 1913, the retraction gear 1910 rolls along the third installation groove 1913. Then the retraction gear 1910 drives the driving gear 193 to rotate through the rotating rod 199, and the driving gear 193 drives the driving rack 195 and the limit tongue 196 to move, so that the limit tongue 196 is retracted into the second installation groove 191, releasing the restriction of the limit tongue 196 on the movable placement plate 9. And when the limit tongue 196 is completely retracted into the second installation groove 191, the bottom of the movable placement plate 9 just contacts the top of the blocking platform 12.

[0054] As Figures 3-5 shown in the figure, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention is presented. To improve the manufacturing and installation fault tolerance of the retraction rack 1911 and ensure the smooth operation of the entire device, in this embodiment, the retraction rack 1911 is slidably installed inside the third installation groove 1913, and a third compression spring 1912 is connected between the retraction rack 1911 and the third installation groove 1913. The elastic coefficient of the third compression spring 1912 is greater than that of the second compression spring 192.

[0055] When the retraction rack 1911 is designed or manufactured to be too long, when the limit tongue 196 is completely retracted into the second installation groove 191, the movable placement plate 9 has not yet contacted the blocking platform 12. At this time, the limit tongue 196 will be blocked by the second installation groove 191 and cannot move, so the retraction gear 1910 cannot rotate either. When the placement outer frame 8 drives the movable placement plate 9 to continue descending, the retraction gear 1910 will squeeze the retraction rack 1911 and cause the retraction rack 1911 to retract into the third installation groove 1913, so that the retraction gear 1910 can pass through smoothly, preventing the entire device from jamming and protecting the limit mechanism 19;

[0056] Similarly, when the placement outer frame 8 drives the movable placement plate 9 to rise, since the elastic coefficient of the third compression spring 1912 is greater than that of the second compression spring 192, the retraction gear 1910 will first roll along the retraction rack 1911, that is, the retraction gear 1910 will first drive the limit tongue 196 to extend out of the second installation groove 191. When the limit tongue 196 is blocked by the placement outer frame 8, the retraction gear 1910 can no longer rotate. At this time, the retraction gear 1910 will squeeze the retraction rack 1911 and continue to move upward.

[0057] As Figures 3-5 and Figures 7-8 shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention. In order to enable the concrete slag on the movable placement plate 9 to fall smoothly into the collection cavity 10, it is necessary for the movable placement plate 9 to rotate downward in time to open the gap between the movable placement plate 9 and the placement outer frame 8. Therefore, in this embodiment, the length of the second installation groove 191 is greater than the length of the limit tongue 196, and when the movable placement plate 9 abuts against the blocking platform 12, there is a gap between the end of the limit tongue 196 close to the movable placement plate 9 and the port of the second installation groove 191, and the length of this gap is 5 mm to 10 mm.

[0058] When the placement outer frame 8 drives the movable placement plate 9 to rise, the placement outer frame 8 will also drive the retraction gear 1910 to rise, so that under the action of the retraction rack 1911, the retraction gear 1910 drives the limit tongue 196 to move. Since there is a gap between the end of the limit tongue 196 and the port of the second installation groove 191, after the placement outer frame 8 rises a certain distance, the limit tongue 196 will extend out of the second installation groove 191. At this time, under the action of gravity, the movable placement plate 9 will rotate downward, and an opening will appear between the movable placement plate 9 and the placement outer frame 8, and the concrete on the movable placement plate 9 will slide from the opening into the collection cavity 10.

[0059] As Figures 3-4 and Figures 6-7As shown in the figure, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention is shown. In this embodiment, the reset mechanism 17 includes a reset gear 172 and a reset rack 173. The reset gear 172 is fixedly connected to the fixed shaft of the movable placement plate 9. A reduction gear 171 is rotatably connected to the side surface of the placement outer frame 8. The reduction gear 171 is meshed with the reset gear 172. A first groove 14 for the reset gear 172 and the reduction gear 171 to move is formed on the side surface of the bottom plate 1. A first installation groove 174 is formed on the side wall of the first groove 14. The reset rack 173 is slidably connected to the inside of the first installation groove 174. A first compression spring 175 is connected between the reset rack 173 and the first installation groove 174. The reset rack 173 can be meshed with the reduction gear 171. The distance from the top of the reset rack 173 to the top of the protection box 3 is greater than the distance from the axis of the reset gear 172 to the upper surface of the placement outer frame 8. The rotation range of the movable placement plate 9 is -60° to 70°;

[0060] In order to enable the movable placement plate 9 to be smoothly rotated above the placement outer frame 8, the component of the elastic force of the first compression spring 175 on the reduction gear 171 in the vertical direction is greater than the gravity of the movable placement plate 9, and the elastic coefficient of the first compression spring 175 is greater than the elastic coefficient of the second compression spring 192;

[0061] In order to enable the movable placement plate 9 to be blocked by the limiting tongue 196, the top of the retraction rack 1911 is lower than the bottom of the reset rack 173.

[0062] When the placement outer frame 8 drives the movable placement plate 9 to rise, the placement outer frame 8 also drives the reset gear 172 and the reduction gear 171 to rise. Since the reset rack 173 is fixed in the vertical direction, the reduction gear 171 will roll along the reset rack 173, so that the reduction gear 171 drives the reset gear 172 and the movable placement plate 9 to rotate clockwise, making one end of the movable placement plate 9 rotate above the placement outer frame 8. When the upper surface of the placement outer frame 8 is flush with the upper surface of the protection box 3, the reduction gear 171 and the reset rack 173 are disengaged from the meshing state. At this time, the reduction gear 171 and the movable placement plate 9 are not affected by external forces. Under the self-weight of the movable placement plate 9, the movable placement plate 9 rotates counterclockwise downward, and then the movable placement plate 9 is blocked by the limiting tongue 196, so that the movable placement plate 9 returns to the horizontal state, facilitating the placement of the concrete block to be detected on the movable placement plate 9;

[0063] Due to the blockage of the limit tongue 196, the movable placement plate 9 cannot rotate counterclockwise, so the reduction gear 171 cannot rotate clockwise. When the placement outer frame 8 drives the movable placement plate 9 to descend, the reduction gear 171 will squeeze the return rack 173 and cause the return rack 173 to retract into the first installation groove 174, so that the reduction gear 171 can pass through the return rack 173 smoothly.

[0064] As Figures 3-4 and Figures 7-8 shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention. In order to make the movable placement plate 9 rotate slowly and reduce the stress intensity of the reduction gear 171, in this embodiment, the diameter of the reduction gear 171 is smaller than the diameter of the return gear 172, and the diameter ratio of the reduction gear 171 to the return gear 172 is 1:(2-3).

[0065] That is, when the reduction gear 171 rotates 2 or 3 circles, the return gear 172 can rotate the bottom plate 1 circle, reducing the rotation speed of the movable placement plate 9, improving the control accuracy of the movable placement plate 9, and avoiding excessive rotation of the movable placement plate 9, which may cause the movable placement plate 9 to be unable to return to its original position.

[0066] As Figures 1-3 shown, a compressive strength detection device for autoclaved aerated concrete blocks provided by the present invention. In order to facilitate the cleaning of the concrete slag in the collection chamber 10, in this embodiment, a collection drawer 2 is provided in the collection chamber 10.

[0067] Working principle:

[0068] Initially, the placement outer frame 8 is lifted to a position flush with the top of the protective box 3, and then the concrete block is placed on the movable placement plate 9. The telescopic rod 7 drives the pressure plate 6 and the guide post 5 to descend. Under the action of gravity, the placement outer frame 8 follows the guide post 5 to descend. Since the movable placement plate 9 is blocked by the limit tongue 196, the reduction gear 171 will squeeze the return rack 173 and cross the return rack 173 to continue descending. When the placement outer frame 8 drives the retraction gear 1910 to encounter the retraction rack 1911, the retraction gear 1910 will engage with the retraction rack 1911, and the retraction gear 1910 will roll along the retraction rack 1911. Then the retraction gear 1910 will drive the drive gear 193 to rotate through the rotating rod 199. The drive gear 193 drives the drive rack 195 and the limit tongue 196 to move, causing the limit tongue 196 to retract into the second installation groove 191, and the movable placement plate 9 will fall onto the blocking table 12, and the placement outer frame 8 will fall onto the blocking block 13;

[0069] Then the telescopic rod 7 continues to drive the pressing plate 6 and the guide column 5 to descend, and the pressing plate 6 will squeeze the concrete block on the movable placement plate 9. The value of the reaction force received by the telescopic rod 7 is continuously observed, which is the pressure of the telescopic rod 7 on the concrete block. When the force received by the telescopic rod 7 suddenly decreases, it indicates that the concrete block has been broken, and the power supply of the telescopic rod 7 should be cut off immediately. The maximum reaction force received by the telescopic rod 7 is the compressive strength of the concrete block.

[0070] Then, the telescopic rod 7 drives the pressing plate 6 and the guide column 5 to rise, and the guide column 5 drives the placement outer frame 8 to rise through the limiting baffle 16, and the placement outer frame 8 drives one end of the movable placement plate 9 to rise. Since the limiting tongue 196 no longer blocks one end of the movable placement plate 9, one end of the movable placement plate 9 will rotate downward relative to the placement outer frame 8. As the height of the placement outer frame 8 increases, the opening between the movable placement plate 9 and the placement outer frame 8 will become larger and larger, and the concrete debris on the movable placement plate 9 will slide from the opening into the collection drawer 2. Although the retraction gear 1910 will drive the limiting tongue 196 to extend out of the second mounting groove 191, the movable placement plate 9 has been rotated to the bottom of the placement outer frame 8 at this time, and the limiting tongue 196 will not affect the movement of the movable placement plate 9.

[0071] As the placement outer frame 8 drives the reduction gear 171 to rise, when the reduction gear 171 encounters the reset rack 173, the reduction gear 171 and the reset rack 173 are meshed, and the reduction gear 171 drives the reset gear 172 and the movable placement plate 9 to rotate. One end of the movable placement plate 9 will squeeze the limiting tongue 196, and squeeze the limiting tongue 196 into the second mounting groove 191, and the movable placement plate 9 will cross the limiting tongue 196 and continue to rotate upward. After the movable placement plate 9 passes the limiting tongue 196, under the action of the second compression spring 192, the limiting tongue 196 will extend out of the second mounting groove 191 again, and when the reduction gear 171 is disengaged from the reset rack 173, under the deadweight of the movable placement plate 9, the movable placement plate 9 will rotate downward until the movable placement plate 9 is blocked by the limiting tongue 196, and the next detection can be restarted.

[0072] When the movable placing plate 9 has not yet contacted the blocking platform 12, the limiting tongue 196 will be completely retracted into the second mounting groove 191, which will cause the movable placing plate 9 to rotate downward in advance. However, since the distance between the movable placing plate 9 and the blocking platform 12 is very small at this time, it is not enough to make the concrete blocks fall from the opening between the movable placing plate 9 and the placing outer frame 8, and the use of the device is not affected. As the placing outer frame 8 continues to descend, when the placing outer frame 8 contacts the blocking block 13, the movable placing plate 9 also contacts the blocking platform 12. At this time, the top of the movable placing plate 9 and the placing outer frame 8 are level again, and the concrete blocks on the movable placing plate 9 can continue to be detected.

[0073] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0074] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A compressive strength testing device for autoclaved aerated concrete blocks, comprising a base plate (1), characterized in that: The bottom plate (1) is fixedly connected to a gantry (4), a telescopic rod (7) is fixedly installed on the gantry (4), a pressing plate (6) is fixedly connected to the movable end of the telescopic rod (7) close to the bottom plate (1), a plurality of guide columns (5) are fixedly connected to the bottom of the pressing plate (6), a placement frame (8) is slidably installed between the plurality of guide columns (5), a limiting stopper (16) is fixedly connected to one end of the plurality of guide columns (5) passing through the placement frame (8), a movable placement plate (9) is rotatably installed inside the placement frame (8) via a fixed axis, the length and width of the movable placement plate (9) are respectively greater than the length and width of the concrete block, and a limiting rod (18) is fixedly connected to the bottom of the placement frame (8); A protection box (3) is fixedly installed on the bottom plate (1), and the protection box (3) is located directly below the outer frame (8). A collecting chamber (10) is provided on the side of the protection box (3), and the distance from the top of the collecting chamber (10) to the upper surface of the protection box (3) is greater than the thickness of the concrete block. The interior of the protection box (3) is fixedly connected to a blocking platform (12) via a fixing rod (11), and the blocking platform (12) is a round table. A plurality of blocking blocks (13) are fixedly connected to the inner side of the protection box (3), and the top of the blocking block (13) and the top of the blocking platform (12) are in the same horizontal plane, and the distance between the end of the blocking block (13) and the inner wall of the bottom plate (1) is less than the distance between the side of the movable placement plate (9) and the inner wall of the bottom plate (1); A limiting mechanism (19) is installed on the placement outer frame (8), the output end of the limiting mechanism (19) abuts against the movable placement plate (9), and the limiting mechanism (19) is used to prevent the movable placement plate (9) from rotating downward. Initially, the surfaces of the movable placement plate (9) and the placement outer frame (8) are flush. The limiting mechanism (19) includes an unlocking mechanism, which is installed on the bottom plate (1). One end of the unlocking mechanism is connected to the output end of the limiting mechanism (19). When the movable placement plate (9) moves downward and abuts against the top of the blocking platform (12), the unlocking mechanism is used to release the limit of the movable placement plate (9) by the output end of the limiting mechanism (19); A reset mechanism (17) is installed on the bottom plate (1), one end of the reset mechanism (17) is connected to the fixed shaft of the movable placement plate (9), and when the movable placement plate (9) contacts the limit rod (18) and the placement outer frame (8) drives the movable placement plate (9) to rise, the reset mechanism (17) is used to drive the movable placement plate (9) to rotate to the top of the placement outer frame (8) and return it to its original position.

2. The compressive strength detection device for autoclaved aerated concrete blocks according to claim 1, characterized in that: When the movable placement plate (9) contacts the end of the limiting rod (18), the angle between the movable placement plate (9) and the placement outer frame (8) ranges from 40° to 60°.

3. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 1, characterized in that: The limiting mechanism (19) comprises a second mounting groove (191) provided on the side of the placement outer frame (8) close to the movable placement plate (9); a limiting tongue (196) is slidably connected inside the second mounting groove (191); a second compression spring (192) is connected between the side of the limiting tongue (196) away from one end of the movable placement plate (9) and the second mounting groove (191); an inclined surface (192) is provided at the bottom of one end of the limiting tongue (196) close to the movable placement plate (9). 97), a limiting slot (198) adapted to the limiting tongue (196) is provided at the bottom of the side surface of the movable placement plate (9) near the limiting tongue (196), one end of the limiting tongue (196) is inserted into the limiting slot (198) and abuts against the inner top of the limiting slot (198), and initially, the distance from the top of the limiting tongue (196) to the upper surface of the placement outer frame (8) is equal to the distance from the inner top of the limiting slot (198) to the upper surface of the movable placement plate (9); One end of the unlocking mechanism is connected to the limiting tongue (196).

4. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 3, characterized in that: The unlocking mechanism comprises a rotating rod (199) rotatably mounted on the placement outer frame (8); one end of the rotating rod (199) close to the limiting tongue (196) is fixedly connected to a driving gear (193); a circular groove (194) adapted to the driving gear (193) is provided on the placement outer frame (8); a driving rack (195) is fixedly connected to the bottom of the limiting tongue (196); the driving gear (193) and the driving rack (195) are meshingly connected; one end of the rotating rod (199) extending out of the placement outer frame (8) is fixedly connected to a retracting gear (1910); and a second groove (15) for the retracting gear (1910) to move is provided on the bottom plate (1); The unlocking mechanism also includes a retractable rack (1911), a third mounting groove (1913) is provided on the side of the second groove (15), the retractable rack (1911) is installed inside the third mounting groove (1913), and the retractable gear (1910) can mesh with the third mounting groove (1913). When the movable placement plate (9) contacts the top of the blocking platform (12), the retractable gear (1910) and the third mounting groove (1913) are in a meshing state, and the limiting tongue (196) is completely retracted into the second mounting groove (191).

5. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 4, characterized in that: The retracting rack (1911) is slidably installed inside the third installation groove (1913), and a third compression spring (1912) is connected between the retracting rack (1911) and the third installation groove (1913), and the elastic coefficient of the third compression spring (1912) is greater than the elastic coefficient of the second compression spring (192).

6. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 5, characterized in that: The length of the second mounting groove (191) is greater than the length of the limiting tongue (196), and when the movable placement plate (9) abuts against the blocking platform (12), a gap is left between the end of the limiting tongue (196) close to the movable placement plate (9) and the end of the second mounting groove (191), and the gap is 5 mm to 10 mm long.

7. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 4, characterized in that: The reset mechanism (17) comprises a reset gear (172) and a reset rack (173); the reset gear (172) is fixedly connected to a fixed shaft of the movable placement plate (9); a reduction gear (171) is rotatably connected to the side of the placement outer frame (8); the reduction gear (171) and the reset gear (172) are meshedly connected; a first groove (14) for the reset gear (172) and the reduction gear (171) to move is provided on the side of the bottom plate (1); a first mounting groove (14) is provided on the side wall of the first groove (14) The first mounting groove (174) is provided with a reset rack (173) which is slidably connected to the inside of the first mounting groove (174); a first compression spring (175) is connected between the reset rack (173) and the first mounting groove (174); the reset rack (173) can mesh with the reduction gear (171); the distance from the top of the reset rack (173) to the top of the protection box (3) is greater than the distance from the axis of the reset gear (172) to the upper surface of the placement outer frame (8); and the rotation range of the movable placement plate (9) is -60° to 70°; The component of the elastic force of the first compression spring (175) on the reduction gear (171) in the vertical direction is greater than the gravity of the movable placement plate (9), and the elastic coefficient of the first compression spring (175) is greater than the elastic coefficient of the second compression spring (192); The top of the retraction rack (1911) is lower than the bottom of the reset rack (173).

8. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 7, characterized in that: The diameter of the reduction gear (171) is smaller than the diameter of the reset gear (172), and the ratio of the diameter of the reduction gear (171) to the diameter of the reset gear (172) is 1:2-3.

9. The compressive strength testing device for autoclaved aerated concrete blocks according to claim 1, characterized in that: A collection drawer (2) is arranged in the collection chamber (10).

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