A slump testing device for concrete in building construction

Abstract

This invention relates to the field of concrete testing, and more particularly to a slump testing device for construction concrete, comprising a test platform and a slump cone. A top frame is fixed to the upper end of the test platform, and extension supports are distributed at the four corners of the test platform. A positioning rod is fixed between the top of the extension supports and the test platform. Supports are distributed at the four corners of the bottom of the slump cone, and the supports are slidably mounted on the positioning rods. A scraping mechanism is provided at the top of the slump cone, comprising a ring sleeve rotatably mounted on the outer wall of the slump cone. A top scraper is evenly fixed to the top of the ring sleeve, and the top scraper rests against the top of the slump cone. An inner wall scraper is fixed to the bottom of the top scraper, and the inner wall scraper rests against the inner wall of the slump cone. This invention can effectively clean concrete slurry adhering to the inner wall, improving the cleanliness of the slump cone while ensuring the integrity of the concrete cone so that it can slump normally, thus improving testing accuracy.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, and more particularly to a test device for the slump of concrete in building construction. Background Technology

[0002] The concrete slump test is the most commonly used field method for evaluating the workability of fresh concrete, primarily used to determine its fluidity. During the test, the mixture is layered into a slump cone according to standard procedures and compacted. The cone is then lifted vertically; the concrete collapses under its own weight. The difference in height between the top of the cone and the highest point of the collapsed concrete is measured; this is the slump value. This test is simple to perform and provides intuitive results, making it an important basis for judging concrete workability and guiding mix design adjustments during construction.

[0003] Currently, the commonly used slump testing equipment on construction sites typically includes a slump cone, measuring ruler, and tamping rod. During testing, the slump cone is filled with mixed concrete, vibrated and smoothed, and then manually lifted upwards. The measuring ruler is used to measure the height difference of the concrete before and after slump. During this process, the slump cone is prone to shaking when manually lifted, causing it to collide with the concrete cone. At the same time, the concrete slurry tends to stick to the cone wall. When the slump cone is lifted, some of the slurry will move upwards with it, which not only damages the concrete cone and affects the testing process, but the residual slurry also affects the next test of the slump cone. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete slump testing device for building construction, which aims to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A concrete slump testing device for building construction includes a test platform and a slump cylinder. A top frame is fixed to the upper end of the test platform, and extension supports are distributed at the four corners of the test platform. A positioning rod is fixed between the top of each extension support and the test platform. Supports are distributed at the four corners of the bottom of the slump cylinder, and the supports are slidably mounted on the positioning rods. A scraping mechanism is provided at the top of the slump cylinder, including a ring sleeve rotatably mounted on the outer wall of the slump cylinder. A top scraper is uniformly fixed to the top of the ring sleeve, and the top scraper is attached to the top of the slump cylinder. An inner wall scraper is fixed to the bottom of the top scraper, and the inner wall scraper is attached to the inner wall of the slump cylinder. A central rod is fixed to the center of the top scraper. A driving mechanism is provided at the upper end of the top frame, and the driving mechanism is used to control the rotation or lifting of the central rod. A striking mechanism is uniformly arranged circumferentially on the outer wall of the slump cylinder. When the central rod rotates, it drives the striking mechanism through the ring sleeve to strike and vibrate the slump cylinder. A measuring mechanism is also provided at the upper end of the test platform.

[0007] As a further embodiment of the present invention: a sliding push rod is radially slidably disposed on the extension bracket, a rotating seat is fixedly disposed at the end of the sliding push rod, the rotating seat is rotatably engaged with one end of the connecting rod, the other end of the connecting rod is rotatably engaged with the corresponding support, and a top spring is disposed between the rotating seat and the inner wall of the extension bracket.

[0008] As a further aspect of the present invention: the outer wall of the ring is provided with a toothed groove in the circumferential direction, the top scraper and the top of the ring form an inlet for filling concrete into the slump cylinder, and the outer walls on both sides of the central rod are provided with limiting grooves along the axial direction.

[0009] As a further embodiment of the present invention: the striking mechanism includes a fixed frame, the bottom end of which is fixedly connected to the outer wall of the collapse cylinder. A movable rod is radially slidably disposed on the fixed frame. A pressure plate is fixedly connected to one end of the movable rod. A compression spring is disposed between the pressure plate and the fixed frame. A mounting plate is fixedly connected to the other end of the movable rod. Striking rods parallel to the movable rod are fixedly disposed at both ends of the mounting plate. The striking rods slide through the fixed frame and are fixedly connected to hammer heads. A rotating rod is rotatably mounted on the top of the fixed frame. A driving tooth is fixedly sleeved on the top of the rotating rod. The driving tooth meshes with a tooth groove. An eccentric block is fixedly connected to the bottom end of the rotating rod. The pressure plate always abuts against the outer wall of the eccentric block.

[0010] As a further aspect of the present invention, the hammerhead is made of rubber.

[0011] As a further embodiment of the present invention: the driving mechanism includes a housing, a threaded sleeve, and a rotating sleeve. The housing is fixedly mounted on the upper end of the top frame. The threaded sleeve is rotatably mounted on the top frame and threadedly connected to the central rod. The rotating sleeve is coaxially rotatably mounted on the top end of the housing and slidably connected to the central rod. A gear one is fixedly sleeved on the outer wall of the threaded sleeve, and a gear two is fixedly sleeved on the outer wall of the rotating sleeve. A limit block is provided on the inner wall of the rotating sleeve, and the limit block is adapted to be slidably mounted in the limit groove.

[0012] As a further embodiment of the present invention: a lifting plate is provided inside the housing, a drive motor is fixedly provided at the center of the upper end of the lifting plate, a clutch tooth is connected to the output end of the drive motor, the clutch tooth meshes with gear one or gear two, a screw is threaded through one end of the lifting plate, a guide rod is slidably provided through the other end of the lifting plate, the two ends of the screw are rotatably engaged with the housing, and the two ends of the guide rod are fixedly connected to the housing.

[0013] As a further aspect of the present invention: the measuring mechanism includes a measuring column with scale lines, the measuring column is fixedly installed on the test bench, a sliding sleeve is slidably installed on the outer side of the measuring column, a retaining sleeve is fixedly provided on one side of the sliding sleeve, and a calibration rod is horizontally slidably installed inside the retaining sleeve.

[0014] As a further embodiment of the present invention: a locking element one is threadedly installed on the outer wall of the sliding sleeve, and a locking element two is threadedly installed on the outer wall of the ferrule.

[0015] The beneficial effects of this invention are:

[0016] (1) During the scraping process, the central rod will drive the top scraper to sweep and clean the top of the slump cylinder, which can effectively remove the slurry overflowing from the top of the slump cylinder, so that the concrete will be accurately flush with the slump cylinder before slumping, ensuring the accuracy and reliability of the slump test process. At the same time, the central rod will drive the inner wall scraper to rotate and scrape the inner wall of the slump cylinder, thereby effectively cleaning the concrete slurry adhering to the inner wall. While improving the cleanliness of the slump cylinder, it also ensures the integrity of the concrete cone so that it can collapse normally, which is conducive to improving the accuracy of the test.

[0017] (2) When the lifting cylinder is lifted, the central rod drives the ring to move upward. Since the inner wall scraper supports and limits the slump cylinder from the inside, the inner wall scraper will support the slump cylinder and lift it synchronously. During the rising process, the sliding cooperation between the central rod and the support is used to limit and guide the slump cylinder, so that the slump cylinder can be lifted vertically along the axial direction smoothly, avoiding the swaying of the slump cylinder during the lifting process and causing damage and interference to the concrete cone. The structure is compact and ingenious, and has high practicality.

[0018] (3) By setting up a striking mechanism, during the scraping process, the central rod drives the ring sleeve to rotate, and the ring sleeve will synchronously drive the corresponding drive teeth to rotate through the tooth groove. The drive teeth will drive the eccentric block to rotate through the rotating rod, and drive the hammer head to reciprocate to strike and vibrate the slump cylinder through the pressure plate, so that the concrete slurry in the slump cylinder is evenly and densely distributed. When the slump cylinder is raised and lowered, the hammer head reciprocates to strike the slump cylinder, and the inner wall scraper will knock off and scrape the concrete slurry adhering to the inner wall of the slump cylinder, which is convenient for the next use of the slump cylinder. It integrates the vibration function and the cleaning function, which greatly improves the practicality. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the state when the collapse cylinder is lifted in this invention.

[0022] Figure 3 This is a schematic diagram of the collapse cylinder in this invention.

[0023] Figure 4 This is a schematic diagram of the striking mechanism in this invention.

[0024] Figure 5 This is a schematic diagram of the scraping mechanism in this invention.

[0025] Figure 6 This is a schematic diagram of the drive mechanism in this invention.

[0026] Figure 7 This is a schematic diagram of the structure of the screw sleeve and the rotating sleeve in this invention.

[0027] Figure 8 This is a schematic diagram of the measuring mechanism in this invention.

[0028] In the picture:

[0029] 1. Test stand; 11. Top frame; 12. Extension bracket; 13. Positioning rod;

[0030] 2. Collapse cylinder; 21. Support; 22. Connecting rod; 23. Sliding push rod; 231. Rotating seat; 24. Top spring;

[0031] 3. Striking mechanism; 31. Fixed frame; 32. Movable rod; 321. Compression spring; 322. Pressure plate; 33. Mounting plate; 331. Striking rod; 332. Hammer head; 34. Rotating rod; 341. Drive gear; 342. Eccentric block;

[0032] 4. Scraping mechanism; 41. Ring sleeve; 411. Toothed groove; 42. Top scraper; 43. Inner wall scraper; 44. Center rod; 441. Limiting groove;

[0033] 5. Drive mechanism; 51. Housing; 52. Screw sleeve; 521. Gear one; 53. Rotating sleeve; 531. Limiting block; 532. Gear two; 54. Drive motor; 541. Clutch gear; 55. Lifting plate; 551. Screw; 552. Guide rod;

[0034] 6. Measuring mechanism; 61. Measuring column; 62. Sliding sleeve; 621. Locking component one; 63. Compression sleeve; 631. Locking component two; 64. Calibration rod. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-5As shown, this invention is a concrete slump testing device for building construction, including a test platform 1 and a slump cylinder 2. A top frame 11 is fixedly mounted on the upper end of the test platform 1. Extension supports 12 are distributed at the four corners of the test platform 1. Positioning rods 13 are fixed between the top of the extension supports 12 and the test platform 1. Supports 21 are distributed at the four corners of the bottom of the slump cylinder 2, and the supports 21 are slidably mounted on the positioning rods 13. A scraping mechanism 4 is provided at the top of the slump cylinder 2. The scraping mechanism 4 includes a ring 41, which is rotatably mounted on the outer wall of the slump cylinder 2. The top of the ring 41 is uniformly... A top scraper 42 is fixedly installed and abuts against the top of the slumping cylinder 2. An inner wall scraper 43 is fixedly installed at the bottom of the top scraper 42 and abuts against the inner wall of the slumping cylinder 2. A central rod 44 is fixedly installed in the center of the top scraper 42. A drive mechanism 5 is installed at the upper end of the top frame 11. The drive mechanism 5 is used to control the rotation or lifting of the central rod 44. A striking mechanism 3 is evenly arranged circumferentially on the outer wall of the slumping cylinder 2. When the central rod 44 rotates, it will drive the striking mechanism 3 through the ring 41 to strike and vibrate the slumping cylinder 2. A measuring mechanism 6 is also installed at the upper end of the test platform 1.

[0037] Specifically, by setting up a scraping mechanism 4 and a driving mechanism 5, before testing, the concrete slurry to be tested is first poured into the slump cylinder 2. After it is filled, the driving mechanism 5 is used to control the rotation of the center rod 44. At this time, the center rod 44 will drive the striking mechanism 3 through the ring 41 to strike and vibrate the slump cylinder 2, so that the concrete slurry is evenly distributed and compacted.

[0038] When preparing to scrape the concrete after filling, the center rod 44 will drive the top scraper 42 to sweep and clean the top of the slump cylinder 2, effectively removing the slurry overflowing from the top of the slump cylinder 2. This ensures that the concrete is accurately level with the slump cylinder 2 before slumping, guaranteeing the accuracy and reliability of the slump test process. At the same time, the center rod 44 will drive the inner wall scraper 43 to rotate and scrape the inner wall of the slump cylinder 2, effectively cleaning the concrete slurry adhering to the inner wall. This improves the cleanliness of the slump cylinder 2 while ensuring the integrity of the concrete cone so that it can slump normally, which is beneficial to improving the accuracy of the test.

[0039] When the scraping is finished and the slump cylinder is ready to be lifted, the central rod 44 drives the ring 41 to move upward. Since the inner wall scraper 43 supports and limits the slump cylinder 2 from the inside, the inner wall scraper 43 will support the slump cylinder 2 and lift it synchronously. During the rising process, the sliding cooperation between the central rod 44 and the support 21 is used to limit and guide the slump cylinder 2, so that the slump cylinder 2 can be lifted vertically along the axial direction smoothly, avoiding the swaying of the slump cylinder 2 during the lifting process and causing damage and interference to the concrete cone. The structure is compact and ingenious, and has high practicality.

[0040] like Figures 1-3As shown, a sliding push rod 23 is radially slidably disposed on the extension bracket 12. A rotating seat 231 is fixed at the end of the sliding push rod 23. The rotating seat 231 is rotatably engaged with one end of the connecting rod 22, and the other end of the connecting rod 22 is rotatably engaged with the corresponding support 21. A top spring 24 is disposed between the rotating seat 231 and the inner wall of the extension bracket 12.

[0041] Specifically, in the initial state, the slump cylinder 2 is placed on the test platform 1, and the height of the sliding push rod 23 is half the height of the slump cylinder 2. Under the elastic force of the top spring 24, the sliding push rod 23 will apply downward pressure to the slump cylinder 2 through the connecting rod 22, so that the slump cylinder 2 is firmly pressed against the test platform 1, preventing the slump cylinder 2 from jumping up and down and causing concrete slurry leakage. When the slump cylinder 2 is raised, the slump cylinder 2 will drive the connecting rod 22 to swing accordingly through the support 21, and gradually compress the top spring 24. When the support 21 rises to be level with the sliding push rod 23, the connecting rod 22 will be at the horizontal limit position, and the top spring 24 will also be compressed and deformed to the limit state. When the slump cylinder 2 continues to rise, the connecting rod 22 will be adjusted from horizontal to inclined upward. At this time, the sliding push rod 23 will apply an upward thrust to the slump cylinder 2 through the connecting rod 22, assisting the slump cylinder 2 to rise upward and effectively preventing the slump cylinder 2 from falling.

[0042] like Figure 1 and Figure 5 As shown, the outer wall of the ring 41 is provided with a toothed groove 411 in the circumferential direction, and the top scraper 42 and the top of the ring 41 form a feed port for filling concrete into the slump cylinder 2. Limiting grooves 441 are provided on the outer walls of both sides of the central rod 44 along the axial direction.

[0043] In this embodiment, the top scraper 42 is arranged in an arc shape and there are three sets evenly distributed. The three sets of top scraper 42 are integrally formed in the center. There is a gap between the adjacent top scraper 42 and the ring 41, through which concrete slurry can be filled into the slump cylinder 2.

[0044] like Figure 1 , Figure 4 and Figure 5As shown, the striking mechanism 3 includes a fixed frame 31. The bottom end of the fixed frame 31 is fixed to the outer wall of the collapse cylinder 2. A movable rod 32 is radially slidably disposed on the fixed frame 31. A pressure plate 322 is fixedly connected to one end of the movable rod 32. A compression spring 321 is disposed between the pressure plate 322 and the fixed frame 31. A mounting plate 33 is fixedly connected to the other end of the movable rod 32. Striking rods 331 parallel to the movable rod 32 are fixedly disposed at both ends of the mounting plate 33. The striking rods 331 slide through the fixed frame 31 and are fixedly connected to a hammer head 332. A rotating rod 34 is rotatably mounted on the top end of the fixed frame 31. A driving tooth 341 is fixedly sleeved on the top end of the rotating rod 34. The driving tooth 341 meshes with the tooth groove 411. An eccentric block 342 is fixedly connected to the bottom end of the rotating rod 34. The pressure plate 322 always abuts against the outer wall of the eccentric block 342.

[0045] Specifically, by setting the striking mechanism 3, during the scraping process, the central rod 44 drives the ring sleeve 41 to rotate. The ring sleeve 41 will synchronously drive the corresponding drive teeth 341 to rotate through the tooth groove 411. The drive teeth 341 will drive the eccentric block 342 to rotate through the rotating rod 34. The eccentric block 342 will continuously squeeze and push the pressure plate 322, causing the compression spring 321 to periodically compress and deform. The pressure plate 322 will drive the striking rods 331 at both ends to perform horizontal reciprocating motion through the mounting plate 33, and reciprocate to strike and vibrate the slump cylinder 2 through the hammer head 332, thereby making the concrete slurry in the slump cylinder 2 evenly and densely distributed. When the slump cylinder 2 is raised and lowered, the ring sleeve 41 is rotated again by the central rod 44. At this time, the hammer head 332 will repeatedly strike the slump cylinder 2. In conjunction with the inner wall scraper 43, the concrete slurry adhering to the inner wall of the slump cylinder 2 will be knocked off and scraped clean, making it convenient for the next use of the slump cylinder 2. It integrates the vibration function and the cleaning function, greatly improving its practicality.

[0046] In this embodiment, the hammerhead 332 is made of rubber. Compared to a metal hammer, the rubber hammer is softer and will not cause pits or scratches on the outer surface of the slump cylinder 2 when struck, thus extending the service life of the slump cylinder 2. At the same time, the sound of the rubber hammer is concentrated and crisp, and the transmission is clearer. Testers can use the sound to determine whether there are still cavities inside the slump cylinder 2, and it is easier to distinguish the true situation of the concrete filling than the chaotic metallic impact sound.

[0047] like Figure 6 and Figure 7 As shown, the drive mechanism 5 includes a housing 51, a screw sleeve 52, and a rotating sleeve 53. The housing 51 is fixedly mounted on the upper end of the top frame 11. The screw sleeve 52 is rotatably mounted on the top frame 11 and threadedly connected to the central rod 44. The rotating sleeve 53 is coaxially rotatably mounted on the top end of the housing 51 and slidably connected to the central rod 44. A gear 1 521 is fixedly sleeved on the outer wall of the screw sleeve 52. A gear 2 532 is fixedly sleeved on the outer wall of the rotating sleeve 53. A limit block 531 is provided on the inner wall of the rotating sleeve 53. The limit block 531 is adapted to slide and is slidably mounted in the limit groove 441.

[0048] Furthermore, a lifting plate 55 is provided inside the housing 51. A drive motor 54 is fixedly installed at the center of the upper end of the lifting plate 55. The output end of the drive motor 54 is connected to a clutch tooth 541. The clutch tooth 541 meshes with a gear 1 521 or a gear 2 532. A screw 551 is threaded through one end of the lifting plate 55, and a guide rod 552 is slidably installed through the other end of the lifting plate 55. The two ends of the screw 551 are rotatably engaged with the housing 51, and the two ends of the guide rod 552 are fixedly connected to the housing 51.

[0049] Specifically, by setting up the drive mechanism 5, when the drive center rod 44 is moved up and down, the screw 551 controls the lifting plate 55 to move up and down until the clutch tooth 541 meshes with the first gear 521. The drive motor 54 will drive the screw sleeve 52 to rotate through the clutch tooth 541. Since the screw sleeve 52 is limited to rotating within the top frame 11 and is threadedly engaged with the center rod 44, the rotation of the screw sleeve 52 will drive the center rod 44 to move axially linearly, thereby causing the slumping cylinder 2 to rise or fall. When the drive center rod 44 rotates, the screw 551 controls the lifting plate 55 to move up and down until the clutch tooth 541 meshes with the second gear 532. The drive motor 54 will drive the rotating sleeve 53 to rotate through the clutch tooth 541. Since the limiting block 531 applies a constraint to the center rod 44 through the limiting groove 441, the center rod 44 will rotate synchronously with the rotating sleeve 53, thereby realizing the rotating scraping action. The clutch tooth 541 is used to switch the transmission process between the screw sleeve 52 and the rotating sleeve 53 by moving up and down. Thus, the lifting and rotating processes of the center rod 44 can be realized by a single drive device. The transmission is reliable and stable, and the operation is simple and efficient.

[0050] In this example, a hand crank is connected to the top of the screw 551. The tester can manually control the clutch switching process of the clutch gear 541 by rotating the hand crank. Of course, the rotation of the screw 551 can also be electrically controlled by a drive source such as a motor, or the height of the mounting plate 33 and the drive motor 54 can be directly controlled and adjusted by using an electric push rod, cylinder, etc. The specific structural form can be determined according to the actual needs.

[0051] like Figure 2 and Figure 8 As shown, the measuring mechanism 6 includes a measuring column 61 with scale lines. The measuring column 61 is fixedly installed on the test bench 1. A sliding sleeve 62 is slidably installed on the outside of the measuring column 61. A retaining sleeve 63 is fixed on one side of the sliding sleeve 62. A calibration rod 64 is horizontally slidably installed inside the retaining sleeve 63.

[0052] Furthermore, a locking element 621 is threaded on the outer wall of the sliding sleeve 62, and a locking element 631 is threaded on the outer wall of the ferrule 63.

[0053] Specifically, by setting up the measuring mechanism 6, before the slump cylinder 2 is raised, the calibration rod 64 is extended inward and the sliding sleeve 62 is slid up and down until the bottom end of the calibration rod 64 is against the top of the slump cylinder 2. At this time, the sliding sleeve 62 is fixed by the locking piece 621 and the scale value on the measuring column 61 is read. Then, the calibration rod 64 is retracted and concrete slurry is poured into the slump cylinder 2. After the slump cylinder 2 is raised, the calibration rod 64 is extended again and the sliding sleeve 62 is slid up and down until the bottom end of the calibration rod 64 is against the highest point of the concrete cone. At this time, the sliding sleeve 62 is fixed by the locking piece 621 and the scale value on the measuring column 61 is read. Then, by calculating the height difference between the two scale values ​​measured, the slump value of the concrete can be accurately measured. The operation is simple and convenient, and the slump of concrete can be quickly and accurately measured on site without the need for additional measuring tools.

[0054] The working principle of this invention is as follows: Figures 1-8As shown, in the initial state, the slump cylinder 2 is placed on the test platform 1. Under the elastic force of the top spring 24, the sliding push rod 23 applies downward pressure to the slump cylinder 2 through the connecting rod 22, so that the slump cylinder 2 is firmly pressed against the test platform 1, preventing the slump cylinder 2 from jumping up and down and causing concrete slurry leakage. The calibration rod 64 is extended inward and the sliding sleeve 62 is slid up and down until the bottom end of the calibration rod 64 is against the top of the slump cylinder 2. At this time, the sliding sleeve 62 is fixed by the locking part 621 and the scale value on the measuring column 61 is read. Then the calibration rod 64 is retracted and concrete slurry is poured into the slump cylinder 2. After the grouting is completed, the center rod 44 will drive the top scraper 42 to sweep and clean the top of the slump cylinder 2, which can effectively scrape off the grout overflowing from the top of the slump cylinder 2, so that the concrete will be accurately flush with the slump cylinder 2 before slumping, ensuring the accuracy and reliability of the slump test process. At the same time, the center rod 44 will drive the inner wall scraper 43 to rotate and scrape the inner wall of the slump cylinder 2, thereby effectively cleaning the concrete grout adhering to the inner wall. While improving the cleanliness of the slump cylinder 2, it also ensures the integrity of the concrete cone so that it can collapse normally. During the scraping process, the central rod 44 drives the ring sleeve 41 to rotate. The ring sleeve 41 will synchronously drive the corresponding drive teeth 341 to rotate through the tooth groove 411. The drive teeth 341 will drive the eccentric block 342 to rotate through the rotating rod 34. The eccentric block 342 will continuously squeeze and push the pressure plate 322, causing the compression spring 321 to periodically compress and deform. The pressure plate 322 will drive the striking rods 331 at both ends to perform horizontal reciprocating motion through the mounting plate 33, and reciprocate to strike and vibrate the slump cylinder 2 through the hammer head 332, thereby making the concrete slurry in the slump cylinder 2 evenly and densely distributed. After the material scraping is completed, the center rod 44 drives the ring sleeve 41 to move upward. Since the inner wall scraper 43 supports and limits the slump cylinder 2 from the inside, the inner wall scraper 43 will support the slump cylinder 2 and make it rise synchronously. During the rising process, the sliding cooperation between the center rod 44 and the support 21 is used to limit and guide the slump cylinder 2, so that the slump cylinder 2 can be raised vertically along the axial direction smoothly, avoiding the swaying of the slump cylinder 2 during the raising process and causing damage or interference to the concrete cone. After the slump cylinder 2 is raised, the calibration rod 64 is extended again and the sliding sleeve 62 is slid up and down until the bottom end of the calibration rod 64 is against the highest point of the concrete cone. At this time, the sliding sleeve 62 is fixed by the locking part 621 to read the scale value on the measuring column 61. Then, by calculating the height difference between the scale values ​​measured before and after, the slump value of the concrete can be accurately measured.

[0055] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A slump testing device for concrete used in building construction, comprising a testing platform (1) and a slump cylinder (2), characterized in that: The test platform (1) is fixedly provided with a top frame (11) at the upper end. Extended supports (12) are distributed at the four corners of the test platform (1). A positioning rod (13) is fixed between the top of the extended support (12) and the test platform (1). Supports (21) are distributed at the four corners of the bottom of the slump cylinder (2). The supports (21) are slidably installed on the positioning rod (13). A scraping mechanism (4) is provided at the top of the slump cylinder (2). The scraping mechanism (4) includes a ring (41). The ring (41) is rotatably installed on the outer wall of the slump cylinder (2). A top scraper (42) is evenly fixed at the top of the ring (41). The top scraper (42) is attached to the top of the collapse cylinder (2), and the bottom of the top scraper (42) is fixed with an inner wall scraper (43). The inner wall scraper (43) is attached to the inner wall of the collapse cylinder (2). The center rod (44) is fixed in the center of the top scraper (42). The top frame (11) is provided with a driving mechanism (5). The driving mechanism (5) is used to control the rotation or lifting of the center rod (44). The outer wall of the collapse cylinder (2) is uniformly provided with a striking mechanism (3) in the circumferential direction. When the center rod (44) rotates, it will drive the striking mechanism (3) through the ring (41) to strike and vibrate the collapse cylinder (2). The test platform (1) is also provided with a measuring mechanism (6).

2. The concrete slump testing equipment for building construction according to claim 1, characterized in that, A sliding push rod (23) is radially slidably disposed on the extension bracket (12). A rotating seat (231) is fixed at the end of the sliding push rod (23). The rotating seat (231) is rotatably engaged with one end of the connecting rod (22). The other end of the connecting rod (22) is rotatably engaged with the corresponding support (21). A top spring (24) is disposed between the rotating seat (231) and the inner wall of the extension bracket (12).

3. The concrete slump testing equipment for building construction according to claim 1, characterized in that, The outer wall of the ring (41) is provided with a toothed groove (411) in the circumferential direction. The top scraper (42) and the top of the ring (41) form a feed port for filling concrete into the slump cylinder (2). Limiting grooves (441) are provided on the outer walls of both sides of the central rod (44) along the axial direction.

4. The concrete slump testing equipment for building construction according to claim 3, characterized in that, The striking mechanism (3) includes a fixed frame (31), the bottom end of which is fixed to the outer wall of the collapse cylinder (2). A movable rod (32) is radially slidably disposed on the fixed frame (31). A pressure plate (322) is fixedly connected to one end of the movable rod (32), and a compression spring (321) is disposed between the pressure plate (322) and the fixed frame (31). A mounting plate (33) is fixedly connected to the other end of the movable rod (32), and the two ends of the mounting plate (33) are fixed with the movable rod (32). 2) Parallel striking rods (331), the striking rods (331) slide through the fixed frame (31) and are fixedly connected to the hammer head (332), the fixed frame (31) is rotatably mounted with a rotating rod (34), the top of the rotating rod (34) is fixedly sleeved with a driving tooth (341), the driving tooth (341) meshes with the tooth groove (411), the bottom end of the rotating rod (34) is fixedly connected to an eccentric block (342), and the pressure plate (322) always abuts against the outer wall of the eccentric block (342).

5. The concrete slump testing device for building construction according to claim 4, characterized in that, The hammerhead (332) is made of rubber.

6. The slump testing equipment for building construction concrete according to claim 3, characterized in that, The drive mechanism (5) includes a housing (51), a screw sleeve (52), and a rotating sleeve (53). The housing (51) is fixed to the upper end of the top frame (11). The screw sleeve (52) is rotatably installed on the top frame (11) and threaded through the center rod (44). The rotating sleeve (53) is coaxially rotatably installed on the top of the housing (51) and slidably through the center rod (44). A gear one (521) is fixedly sleeved on the outer wall of the screw sleeve (52). A gear two (532) is fixedly sleeved on the outer wall of the rotating sleeve (53). A limit block (531) is provided on the inner wall of the rotating sleeve (53). The limit block (531) is adapted to slide in the limit groove (441).

7. The concrete slump testing device for building construction according to claim 6, characterized in that, A lifting plate (55) is provided inside the housing (51). A drive motor (54) is fixedly installed at the center of the upper end of the lifting plate (55). A clutch tooth (541) is connected to the output end of the drive motor (54). The clutch tooth (541) meshes with gear one (521) or gear two (532). A screw (551) is threaded through one end of the lifting plate (55), and a guide rod (552) is slidably installed through the other end of the lifting plate (55). The two ends of the screw (551) are rotatably engaged with the housing (51), and the two ends of the guide rod (552) are fixedly connected to the housing (51).

8. The concrete slump testing equipment for building construction according to claim 1, characterized in that, The measuring mechanism (6) includes a measuring column (61) with scale lines. The measuring column (61) is fixedly installed on the test bench (1). A sliding sleeve (62) is slidably installed on the outside of the measuring column (61). A retaining sleeve (63) is fixed on one side of the sliding sleeve (62). A calibration rod (64) is horizontally slidably installed inside the retaining sleeve (63).

9. A concrete slump testing device for building construction according to claim 8, characterized in that, The outer wall of the sliding sleeve (62) is threaded with a locking element one (621), and the outer wall of the ferrule (63) is threaded with a locking element two (631).

Images