A device for testing the compressive strength of concrete test blocks

Abstract

The utility model discloses a kind of concrete test block compression resistance testing device, belong to concrete test block technical field, including rack, its upper and lower ends of the rack are closed plate, four sides of rack are open. The utility model solves the existing compression resistance testing device when detecting, the bottom and top of concrete test block cannot be effectively guaranteed to be attached with equipment, so that the test result and existing data will produce deviation, so that experimental result is inaccurate, and after testing, the tabletop of equipment cannot be self-cleaning, so that tabletop residual debris, affect the next use of equipment. The utility model drives second lower pressing block to move upward by concrete test block, when second lower pressing block is completely attached with the surface of concrete test block, by embedding the clamping block into the bayonet, so as to fix the height of second lower pressing block, so that equipment can be attached with concrete test block of different properties to detect.

Description

Technical Field

[0001] This utility model relates to the field of concrete test block technology, specifically a concrete test block compressive strength testing device. Background Technology

[0002] Concrete refers to cement concrete, which is made by mixing cement as a binder, sand and stone as aggregates, and water in a certain proportion. When concrete is used, its quality needs to be tested to determine whether it meets the standards. This requires pouring concrete into concrete test blocks and then using a compressive strength testing device to test the concrete test blocks.

[0003] Existing compressive strength testing equipment cannot effectively ensure that the bottom and top of the concrete specimen are in close contact with the equipment during testing, which will cause the test results to deviate from the existing data and make the experimental results inaccurate. At the same time, the equipment platform cannot be self-cleaned after the test, leaving debris on the platform, which will affect the next use of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a concrete block compressive strength testing device that allows for a closer connection between the device and the concrete block, improving the testing accuracy of the device. Furthermore, it can automatically clean the device's platform after testing, thus solving problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a frame, the upper and lower ends of which are closed plates, and the four sides of the frame are open. A side panel is provided inside the side of the frame, and one side panel is rotatably connected to the frame. The height of the side panel is two-thirds of the height of the side opening of the frame. A limit frame is provided at the upper end of the frame, and a hydraulic cylinder is installed inside the limit frame. A support airbag is provided on the lower surface of the frame.

[0006] Preferably, it includes a first pressing block and a second pressing block, wherein the first pressing block is an extension end of the hydraulic cylinder, and the second pressing block is slidably disposed inside the hydraulic cylinder.

[0007] Preferably, a guide groove is provided at the center of the second pressing block, the opening end of the guide groove is smaller than the diameter of the other end of the guide groove, and a twisted rod is slidably connected inside the guide groove, the twisted rod being rotatably disposed at the top of the inside of the first pressing block.

[0008] Preferably, one-third of the length of the twisted rod near the guide groove is twisted, the other end of the twisted rod is straight, and the diameter of the twisted end of the twisted rod is larger than the diameter of the straight end of the twisted rod. The end of the twisted rod away from the guide groove is connected to a first gear.

[0009] Preferably, a rack is meshed with both sides of the first gear, a transmission mechanism is provided on one side of the rack, and a locking rod is connected to the other end of the transmission mechanism. The locking rod is slidably disposed inside the first pressing block and the second pressing block respectively.

[0010] Preferably, the transmission mechanism includes an input shaft, a U-shaped hydraulic pipe, and an output shaft connected to a rack. The U-shaped hydraulic pipe is disposed inside the first pressing block, and the input shaft and the output shaft are sealed and connected to both sides of the inside of the U-shaped hydraulic pipe.

[0011] Preferably, the second pressing block has a slot inside, and the locking rod has locking blocks on three sides away from the U-shaped hydraulic pipe. The slot has a corresponding slot for the locking blocks to be inserted.

[0012] Preferably, an air pipe is provided inside the lower end of the frame, the air pipe is connected to the interior of the supporting air bladder, a storage air bladder is provided on the side of the air pipe, and a pressure gauge and a control valve are provided on the side of the storage air bladder.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention uses a concrete test block to drive a second lower pressure block upwards. Once the second lower pressure block is fully in contact with the surface of the concrete test block, a locking block is inserted into the locking slot to fix the height of the second lower pressure block. This allows the device to be used to test concrete test blocks of different properties. Before testing, a pressure gauge can be used to check if the concrete test block is in contact with the device, thus improving testing accuracy. After testing, the support airbag can be used to return to its original position for automatic surface cleaning, preventing concrete residue from remaining on the device surface and affecting subsequent tests. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the frame and supporting airbag installation structure of this utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure;

[0018] Figure 4 This is a schematic diagram of the installation structure of the first and second pressing blocks of this utility model;

[0019] Figure 5 for Figure 4 A schematic diagram of the BB cross-sectional structure;

[0020] Figure 6 This is a schematic diagram of the installation structure of the input shaft and U-shaped hydraulic pipeline of this utility model.

[0021] In the diagram: 1. Frame; 2. Enclosure; 3. Limiting frame; 301. Hydraulic cylinder; 302. First pressing block; 303. Second pressing block; 304. Guide groove; 305. Twisted rod; 306. First gear; 307. Rack; 308. Input shaft; 309. U-shaped hydraulic pipe; 310. Output shaft; 312. Locking block; 313. Locking slot; 4. Support airbag; 401. Air pipe; 402. Storage airbag; 403. Pressure gauge; 404. Control valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0024] Combination Figures 1-6 This utility model discloses a concrete specimen compression testing device, including a frame 1. The upper and lower ends of the frame 1 are closed plates, and the four sides of the frame 1 are open. A surrounding plate 2 is provided inside the side of the frame 1, and one side of the surrounding plate 2 is rotatably connected to the frame 1. The height of the surrounding plate 2 is two-thirds of the height of the side notch of the frame 1. A limit frame 3 is provided at the upper end of the frame 1, and a hydraulic cylinder 301 is provided inside the limit frame 3. A support airbag 4 is provided on the lower surface of the frame 1.

[0025] It should be noted that the lower part of the frame 1 is restricted by the surrounding plate 2, which can prevent the concrete test block from being splashed to the outside due to excessive local pressure during the compressive strength test, thereby effectively improving the safety of the equipment during operation. The surface of the surrounding plate 2 is provided with through holes at equal intervals, which can be used to observe the condition of the concrete test block through the through holes and the notch on the side of the frame 1.

[0026] In this embodiment, a first pressing block 302 and a second pressing block 303 are included. The first pressing block 302 is an extension end of the hydraulic cylinder 301, and the second pressing block 303 is slidably disposed inside the hydraulic cylinder 301.

[0027] It should be noted that the limiting frame 3 can limit and support the hydraulic cylinder 301, thereby improving the stability of the hydraulic cylinder 301 during use. The hydraulic cylinder 301 drives the first pressing block 302 to move downward, thereby performing compressive strength testing on the concrete test block. During the testing process, the hydraulic cylinder 301 is connected to an external instrument, and the pressure reading of the hydraulic cylinder 301 will be fed back to the instrument.

[0028] In this embodiment, a guide groove 304 is provided at the center of the second pressing block 303. The opening end of the guide groove 304 is smaller than the diameter of the other end of the guide groove 304. A twisted rod 305 is slidably connected inside the guide groove 304. The twisted rod 305 is rotatably disposed at the top of the inside of the first pressing block 302.

[0029] In this embodiment, one-third of the length of the twist rod 305 near the guide groove 304 is twisted, the other end of the twist rod 305 is straight, and the diameter of the twisted end of the twist rod 305 is larger than the diameter of the straight end of the twist rod 305. The end of the twist rod 305 away from the guide groove 304 is connected to the first gear 306.

[0030] It should be noted that the second pressing block 303 is equidistantly arranged inside the first pressing block 302, and the number of the second pressing blocks 303 can be adjusted according to the actual situation. When the second pressing block 303 contacts the concrete test block, the second pressing block 303 will move relative to the first pressing block 302, causing the twisted rod 305 to move and embed into the guide groove 304. When the twisted end of the twisted rod 305 contacts the opening of the guide groove 304, the opening of the guide groove 304 will guide the twisted rod 305, causing the twisted rod 305 and the first gear 306 to rotate. After the rotation is completed, with the relative movement of the twisted rod 305 and the guide groove 304, the twisted rod 305... The twisted end of the 05 rod enters the interior of the guide groove 304. The flat end of the twisted rod 305 is at the same height as the interior of the guide groove 304, allowing the twisted rod 305 to move within the guide groove 304. However, the twisted rod 305 and the guide groove 304 do not contact each other, preventing the twisted rod 305 from continuing to rotate. The first gears 306 at different positions are connected to the racks 307, so the locking rod 311 will only engage in the bayonet after all the first gears 306 have rotated. Because the gap between the twisted rod 305 and the guide groove 304 is relatively large, the gap can be adjusted when multiple twisted rods 305 rotate simultaneously, thus enabling the device to operate stably.

[0031] In this embodiment, racks 307 are meshed on both sides of the first gear 306, a transmission mechanism is provided on one side of the rack 307, and a locking rod 311 is connected to the other end of the transmission mechanism. The locking rod 311 is slidably disposed inside the first pressing block 302 and the second pressing block 303 respectively.

[0032] In this embodiment, the transmission mechanism includes an input shaft 308, a U-shaped hydraulic pipe 309, and an output shaft 310. The input shaft 308 is connected to a rack 307. The U-shaped hydraulic pipe 309 is disposed inside the first pressing block 302. The input shaft 308 and the output shaft 310 are sealed and connected to both sides of the inside of the U-shaped hydraulic pipe 309. The other end of the output shaft 310 is connected to a locking rod 311.

[0033] It should be noted that when the second pressing block 303 initially moves, it will drive the twist rod 305 and the first gear 306 to rotate. The first gear 306 drives the rack 307 and the input shaft 308 to move. The U-shaped hydraulic pipe 309 is sealed to the input shaft 308 and the output shaft 310 respectively. Therefore, when the input shaft 308 moves, it will drive the output shaft 310 and the locking rod 311 to move, thereby adjusting the position of the locking rod 311. When the surface of the concrete test block is uneven, the second pressing block 303 will contact the concrete test block in a certain order. The second pressing block 303 that contacts the concrete test block first will move upward and drive the twist rod 305 to rotate. Then the second pressing block 303 continues to move upward until the last second pressing block 303 that contacts the concrete test block moves. The first gear 306 driven by the second pressing block 303 finally contacts the rack 307 and pushes the locking block 312 into the slot.

[0034] In this embodiment, the second pressing block 303 has a slot 313 inside, and the locking rod 311 has a locking block 312 on three sides away from the U-shaped hydraulic pipe 309. The slot 313 has a corresponding slot for the locking block 312 to be inserted.

[0035] It should be noted that when the locking rod 311 moves and is inserted into the bayonet, the locking rod 311 and the bayonet are conical, which can effectively position the locking rod 311 and the bayonet, so that the two are engaged; at the same time, when the equipment is finished, since the second pressing block 303 loses its upward support, the second pressing block 303 will move downward under the action of gravity, thereby driving the twisted rod 305 to move in the opposite direction to return to its original position, which is convenient for the next use of the equipment.

[0036] It should be noted that an air pipe 401 is provided inside the lower end of the frame 1. The air pipe 401 is connected to the interior of the supporting air bag 4. A storage air bag 402 is provided on the side of the air pipe 401. A pressure gauge 403 and a control valve 404 are provided on the side of the storage air bag 402.

[0037] It should be noted that when a concrete specimen is placed on the surface of the supporting airbag 4, the supporting airbag 4 deforms under the weight of the concrete specimen. Since the supporting airbag 4 has poor ductility, the gas inside it enters the storage airbag 402 through the air tube 401. The surface of the supporting airbag 4 is arc-shaped, so when the center of the concrete specimen is placed at the center of the supporting airbag 4, ideally, the bottom of the concrete specimen is completely in contact with the frame 1. The gas discharged from the supporting airbag 4 into the storage airbag 402 remains constant. Based on this, the reading of the pressure gauge 403 can reflect the degree of contact between the bottom of the concrete specimen and the equipment, thereby increasing the accuracy of the test. Simultaneously, after the test is completed, the gas in the storage airbag 402 flows into the supporting airbag 4, causing the supporting airbag 4 to expand and clean its surface. The air pressure inside the storage airbag 402 can be controlled by the control valve 404.

[0038] Working principle: Open the enclosure 2, then place the concrete test block at the center of the support airbag 4. Then, use the pressure gauge 403 to check for unevenness or gaps at the bottom of the concrete test block. Once the concrete test block meets the testing requirements, close the enclosure 2. The hydraulic cylinder 301 drives the first lower pressure block 302 downward, causing the second lower pressure block 303 to initially contact the concrete test block, which in turn drives the output shaft 310 to move. When the last second lower pressure block 303 contacts the concrete test block, the locking rod 311 moves and embeds into the slot inside the locking block 312, thereby limiting and fixing all the second lower pressure blocks 303, increasing the fit between the second lower pressure blocks 303 and the concrete test block, and thus testing the compressive strength of the concrete test block. Afterward, remove the concrete test block, and the support airbag 4 returns to its original position under air pressure, thereby cleaning the surface of the support airbag 4.

[0039] In summary, by automatically adjusting the height of the second lower pressure block 303, the fit between the equipment and the concrete test block can be increased, making it easier to apply force to different concrete test blocks. After the test is completed, the support airbag 4 returns to its original position, which can automatically clean the equipment.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the compressive strength of concrete test blocks, comprising a frame (1), characterised in that: The upper and lower ends of the frame (1) are closed plates, and the four sides of the frame (1) are open. A side panel (2) is provided inside the side of the frame (1), and one side panel (2) is rotatably connected to the frame (1). The height of the side panel (2) is two-thirds of the height of the side notch of the frame (1). A limit frame (3) is provided at the upper end of the frame (1), and a hydraulic cylinder (301) is provided inside the limit frame (3). A support airbag (4) is provided on the lower surface of the frame (1).

2. The apparatus of claim 1, wherein: It includes a first pressing block (302) and a second pressing block (303). The first pressing block (302) is an extension end of the hydraulic cylinder (301), and the second pressing block (303) is slidably disposed inside the hydraulic cylinder (301).

3. A device for testing the compressive strength of a concrete test block according to claim 2, wherein: The second pressing block (303) has a guide groove (304) at its center. The opening end of the guide groove (304) is smaller than the diameter of the other end of the guide groove (304). A twist rod (305) is slidably connected inside the guide groove (304). The twist rod (305) is rotatably disposed at the top of the inside of the first pressing block (302).

4. The apparatus of claim 3, wherein: The twist rod (305) has one-third of its length near the guide groove (304) in a twisted shape, and the other end of the twist rod (305) is straight. The diameter of the twisted end of the twist rod (305) is larger than the diameter of the straight end of the twist rod (305). The end of the twist rod (305) away from the guide groove (304) is connected to the first gear (306).

5. A device for testing the compressive strength of a concrete test block according to claim 4 wherein: The first gear (306) is meshed with racks (307) on both sides. A transmission mechanism is provided on one side of the rack (307), and a locking rod (311) is connected to the other end of the transmission mechanism. The locking rod (311) is slidably disposed inside the first pressing block (302) and the second pressing block (303).

6. A device for testing the compressive strength of a concrete test block according to claim 5 wherein: The transmission mechanism includes an input shaft (308), a U-shaped hydraulic pipe (309), and an output shaft (310). The input shaft (308) is connected to a rack (307). The U-shaped hydraulic pipe (309) is located inside the first pressing block (302). The input shaft (308) and the output shaft (310) are sealed and connected to both sides of the inside of the U-shaped hydraulic pipe (309). The other end of the output shaft (310) is connected to a locking rod (311).

7. A device for testing the compressive strength of a concrete test block according to claim 6 wherein: The second pressing block (303) has a slot (313) inside. The locking rod (311) has a locking block (312) on three sides away from the U-shaped hydraulic pipe (309). The slot (313) has a corresponding slot for the locking block (312) to be inserted.

8. The apparatus of claim 1, wherein: An air pipe (401) is provided inside the lower end of the frame (1). The air pipe (401) is connected to the interior of the supporting air bag (4). A storage air bag (402) is provided on the side of the air pipe (401). A pressure gauge (403) and a control valve (404) are provided on the side of the storage air bag (402).

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