A concrete slump testing device

Abstract

This utility model discloses a concrete slump testing device, including a base with a lifting structure on it. A vibratory motor for compacting concrete is mounted on the bottom wall of the base. The device also includes a slump cylinder detachably connected to the lifting structure. A connecting sleeve that can slide up and down and rotate 360° is fitted onto a test column. The connecting sleeve is clearance-fitted with the test column, and a test rod is horizontally mounted on one side of the connecting sleeve. The test rod moves by sliding the test sleeve up and down, enabling rapid and accurate detection of the slumped concrete height. The lifting structure includes a support frame vertically mounted on the base. A lifting groove is formed on one side of the support frame, and a lifting screw rotates between the upper and lower walls of the lifting groove. A sliding seat slides within the lifting groove and is threadedly connected to the lifting screw. This utility model relates to the field of concrete testing technology, specifically providing a concrete slump testing device.

Description

Technical Field

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

[0002] Concrete slump is an important indicator for measuring the fluidity, cohesiveness, and water retention of concrete mixtures. The testing method is as follows: the concrete mixture is loaded into a standard slump cone according to the specified method, vibrated to compact it, and then the slump cone is pulled vertically upwards. At this time, the concrete mixture collapses due to its own weight. Then, the difference between the maximum height of the collapsed part and the height of the slump cone is measured with a steel ruler, which is the concrete slump value.

[0003] Existing testing methods mostly involve manual operation of lifting the slump cone, requiring multiple testers to cooperate in completing steps such as loading, vibration, cone removal, and measurement. This is inefficient, and the slump cone is prone to uneven stress and tilting during manual operation. Height measurement relies on manual holding of a steel ruler, and the measurement point is prone to deviating from the center of concrete slump. Furthermore, the perpendicularity of the steel ruler to the horizontal plane cannot be guaranteed, resulting in certain measurement errors. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing thermal testing methods are inefficient and prone to errors.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: The present utility model proposes a concrete slump testing device, including a base, a lifting structure on the base, a vibrating motor for compacting concrete on the bottom wall of the base, and a slump cylinder detachably connected to the lifting structure. A connecting sleeve that can slide up and down and rotate 360° is fitted on the test column. The connecting sleeve is clearance-fitted with the test column, and a test rod is horizontally arranged on one side of the connecting sleeve. The test rod is moved by sliding the test sleeve up and down, so as to realize the rapid and accurate detection of the concrete height after slump.

[0006] The lifting structure includes a support frame vertically mounted on the base. A lifting groove is provided on one side of the support frame, and a lifting screw rotates between the upper and lower walls of the lifting groove. A sliding seat slides in the lifting groove and is threadedly connected to the lifting screw. A rotatable handle is located on the top of the support frame and is connected to the top of the lifting screw. The lifting groove is detachably connected to the collapse cylinder.

[0007] Preferred technical solution 1: A feeding assembly is provided on the base. The feeding assembly includes a support column vertically arranged on the base and opposite to the support frame. A connecting ring is rotatably provided on the top of the support column, and a horizontal support plate is provided on the connecting ring. A storage bin is provided at the other end of the horizontal support plate. A feed inlet is provided at the top of the storage bin. A discharge pipe is provided at the bottom of the storage bin, and the discharge pipe passes through the lower end of the horizontal support plate and extends downward. A discharge shaft is rotatably provided on the top wall of the storage bin, and a stirring rod and a spiral discharge blade are provided on the discharge shaft. The spiral discharge blade is located at the position of the discharge pipe. A discharge motor is provided at the top of the storage bin, and the motor's power output shaft is connected to the discharge shaft.

[0008] Preferred technical solution 2: It also includes two sets of semi-circular positioning rings, the ends of the two sets of semi-circular positioning rings are provided with complementary upper and lower bosses, and the bosses are provided with positioning through holes, and the base is provided with positioning posts corresponding to the positioning through holes.

[0009] Preferred technical solution three: A connector is provided on the outer wall of the collapse cylinder, and an insert is provided on the connector. The slide is provided with a slot corresponding to the insert. The insert and the slot are fixed together by bolts, making the collapse cylinder easy to disassemble and clean.

[0010] Preferred technical solution four: The connection between the test column and the support column and the base is welded with reinforcing ribs.

[0011] Preferred technical solution five: Support pads are provided at the four corners of the bottom of the base. The support pads are made of anti-slip and shock-absorbing rubber and have anti-slip textures on the bottom.

[0012] The concrete slump testing device proposed in this utility model has the following beneficial effects achieved by adopting the above-described structure:

[0013] (1) The device is detachably connected to the slumping cylinder through a lifting structure and a lifting screw driven by a throttle, so as to quickly remove the slumping cylinder after vibration, avoiding the tilting problem caused by uneven force when manually removing the cylinder in the traditional way; at the same time, the screw feeding blade in the feeding component and the feeding motor can stably and continuously feed material into the slumping cylinder without the need for manual addition in multiple times, greatly reducing the operation steps and meeting the high-efficiency testing needs of batch concrete samples.

[0014] (2) The vibratory motor is directly installed on the bottom wall of the base, which can uniformly vibrate the concrete in the slump cylinder and avoid the difference in concrete density caused by uneven vibration force of manual vibration; the test column drives the test rod to realize multi-directional measurement of the slump concrete height, and with the precise scale of the test column, it solves the one-sided problem of traditional single-point measurement; the semi-circular positioning ring provides auxiliary positioning for the bottom of the slump cylinder to prevent displacement of the slump cylinder when adding material or vibrating, and further ensures the accuracy of the slump value;

[0015] (3) The anti-slip and shock-absorbing rubber support pad and anti-slip texture design at the bottom of the base, combined with the four circumferentially evenly distributed reinforcing ribs at the bottom of the test column and support column, can not only prevent the device from sliding during operation, but also reduce the transmission of vibration to the ground and ensure the overall stability of the device; at the same time, the detachable structure of the collapse cylinder facilitates quick disassembly and cleaning after testing, solving the problem of difficult cleaning of residual concrete on the traditional one-piece molded cylinder wall; the reinforcing rib design of the support column and test column can also extend the service life of the device. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of a concrete slump testing device proposed in this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of a concrete slump testing device proposed in this utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the overall structure of a concrete slump testing device proposed in this utility model. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the internal structure of the storage silo of a concrete slump testing device proposed in this utility model.

[0021] The components are as follows: 1. Base, 2. Lifting structure, 3. Vibration motor, 4. Collapse cylinder, 5. Test column, 6. Connecting sleeve, 7. Test rod, 8. Support frame, 9. Lifting screw, 10. Slide, 11. Rotary handle, 12. Support column, 13. Connecting ring, 14. Horizontal support plate, 15. Storage bin, 16. Discharge pipe, 17. Discharge shaft, 18. Stirring rod, 19. Spiral discharge blade, 20. Discharge motor, 21. Semi-circular positioning ring, 22. Positioning column, 23. Connector, 24. Insert block, 25. Reinforcing rib plate, 26. Support pad. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] Example 1

[0025] like Figures 1-3 As shown, the technical solution adopted by this utility model is as follows: A concrete slump testing device includes a base 1, a lifting structure 2 on the base 1, a vibrating motor 3 for compacting concrete on the bottom wall of the base 1, and a slump cylinder 4 detachably connected to the lifting structure 2. The slump cylinder 4 is a conical cylinder with an upper diameter of 100mm, a lower diameter of 200mm, and a height of 300mm, made of 3mm thick stainless steel plate. A test column 5 is vertically arranged on the base 1, and the test column 5 has a scale along the height direction. A connecting sleeve 6 that can slide up and down and rotate 360° is fitted on the test column 5. The connecting sleeve 6 is clearance-fitted with the test column 5, and a test rod 7 is horizontally arranged on one side of the connecting sleeve 6. The test rod 7 is moved by sliding the test sleeve up and down, so as to realize the rapid and accurate detection of the concrete height after slump. Reinforcing ribs 25 are welded at the connection between the test column 5 and the support column 12 and the base 1. The number of ribs is 4 for each column, which are evenly distributed along the circumference to enhance the stability of the column. Support pads 26 are provided at the four corners of the bottom of the base 1. The support pads 26 are made of anti-slip and shock-absorbing rubber and have anti-slip textures on the bottom to prevent the device from sliding or vibrating to the ground when it is working.

[0026] like Figures 1-3 As shown, in order to facilitate the upward removal of the collapse cylinder 4 after vibration is completed and to avoid uneven force and tilting affecting the test, the lifting structure 2 includes a support frame 8 vertically set on the base 1. A lifting groove is opened on one side of the support frame 8 and a lifting screw 9 is rotatably connected between the upper and lower walls of the lifting groove. A sliding seat 10 is slidable in the lifting groove and is threadedly connected to the lifting screw 9. A rotatable handle 11 is rotatably connected to the top of the support frame 8 and is connected to the top of the lifting screw 9. The lifting groove and the collapse cylinder 4 are detachably connected.

[0027] Example 2

[0028] Based on Example 1, such as Figure 3 and Figure 4As shown, to facilitate the stable and continuous addition of concrete into the slump cylinder 4 and avoid excessive addition at one time affecting the authenticity of the test, a feeding assembly is provided on the base 1. The feeding assembly includes a support column 12 vertically mounted on the base 1 and positioned opposite the support frame 8. A connecting ring 13 is rotatably mounted on the top of the support column 12, and a horizontal support plate 14 is mounted on the connecting ring 13. A storage bin 15 is provided at the other end of the horizontal support plate 14. A feed inlet is provided at the top of the storage bin 15, and a discharge pipe 16 is provided at the bottom of the storage bin 15 for discharging concrete. The lower end passes through the horizontal support plate 14 and extends downwards. In specific use, its outlet end is aligned with the center of the upper opening of the slumping cylinder 4 and is 50mm away from the upper opening of the slumping cylinder 4. The inner top wall of the storage bin 15 has a rotating feeding shaft 17, and a stirring rod 18 and a spiral feeding blade 19 are set on the feeding shaft 17. The spiral feeding blade 19 is located at the discharge pipe 16. The top of the storage bin 15 is equipped with a feeding motor 20, and the motor power output shaft is connected to the feeding shaft 17. The feeding speed is adjusted by controlling the rotation speed of the feeding motor 20.

[0029] like Figure 3 and Figure 4 As shown, in order to ensure the accurate placement of the slump cylinder 4 on the base 1 and to prevent displacement of the slump cylinder 4 when adding concrete, two sets of semi-circular positioning rings 21 are also included. The ends of the two sets of semi-circular positioning rings 21 are provided with complementary upper and lower bosses, and the bosses are provided with positioning through holes. The base 1 is provided with positioning posts 22 corresponding to the positioning through holes. In actual use, the two sets of semi-circular positioning rings 21 form a ring and are fixed to the base 1 through the positioning through holes. The formed ring is larger than the bottom diameter of the slump cylinder 4, which helps to position the bottom of the slump cylinder 4.

[0030] like Figure 2 As shown, a connector 23 is provided on the outer wall of the collapse cylinder 4, and an insert 24 is provided on the connector 23. The slide block 10 is provided with a slot corresponding to the insert 24. The insert 24 and the slot are fixed together by bolts. The collapse cylinder 4 is easy to disassemble and clean.

[0031] Specific instructions for using concrete slump testing device

[0032] Collapse cylinder positioning and installation

[0033] Take two sets of semi-circular positioning rings 21 and align their complementary upper and lower protrusions to form a complete ring. Align the positioning pins 22 on the base 1 and insert the positioning through holes on the positioning ring protrusions into the positioning pins 22 to fix the positioning rings on the base 1, forming a positioning area for the bottom of the slumping cylinder 4. Pick up the slumping cylinder 4 and place its bottom into the ring formed by the positioning rings to ensure accurate placement of the slumping cylinder 4 and prevent displacement when adding concrete later. Rotate the handle 11 to push the slide 10 to slide in the lifting groove of the support frame 8, adjusting the height of the slide 10 to match the connecting piece 23 on the outer wall of the slumping cylinder 4. Insert the insert 24 on the connecting piece 23 into the corresponding slot of the slide 10, align the insert 24 with the bolt holes on the slot, screw in the bolts and tighten them to achieve a detachable connection between the slumping cylinder 4 and the lifting structure 2. If it is necessary to clean the slumping cylinder 4 later, the bolts can be unscrewed for disassembly.

[0034] Storage silo location adjustment

[0035] Rotate the connecting ring 13 at the top of the support column 12 to move the horizontal support plate 14 and the storage silo 15, aligning the outlet end of the discharge pipe 16 at the bottom of the storage silo 15 with the center of the upper opening of the slump cylinder 4, ensuring that the outlet end of the discharge pipe 16 is 50mm away from the upper opening of the slump cylinder 4, so that the concrete can fall accurately into the slump cylinder 4. Open the feed port at the top of the storage silo 15 and add a small amount of concrete to be tested into the storage silo 15, then close the feed port. Start the feeding motor 20 at the top of the storage silo 15, and the spiral feed blade 19 will stably convey the material to the discharge pipe 16 and discharge it. By adjusting the speed of the feeding motor 20, test the feeding speed at different speeds. Based on the characteristics of the concrete to be tested, preset an appropriate feeding speed to ensure that the material can be stably and continuously added into the slump cylinder 4, avoiding adding too much at once and affecting the accuracy of the test.

[0036] Concrete Addition and Vibration Stage

[0037] During the filling process, observe the filling of concrete in the slump cylinder 4 in real time to ensure uniform filling. If abnormal feeding speed is detected, adjust the speed of the feeding motor 20 in time. When the concrete in the slump cylinder 4 is close to the cylinder opening, turn off the feeding motor 20 and stop feeding. Start the vibration motor 3 on the bottom wall of the base 1. The vibration of the vibration motor 3 will compact the concrete in the slump cylinder 4 and eliminate the voids inside the concrete. The vibration time is set according to the characteristics of the concrete, generally 30-60 seconds, which can be adjusted according to the actual situation. When there are no obvious bubbles on the concrete surface and the surface is relatively flat, turn off the vibration motor 3 and remove the two sets of semi-circular positioning rings 21 to avoid affecting the slump of the concrete and the accuracy of the experiment.

[0038] Slump testing stage

[0039] Rotate the handle 11 at the top of the support frame 8 to drive the lifting screw 9 to rotate. Since the slide 10 is threadedly connected to the lifting screw 9 and slides in the lifting groove, the slide 10 will move upward along the lifting groove, thereby driving the slumping cylinder 4 connected to it to move upward synchronously. Continue to rotate the handle 11 until the slumping cylinder 4 is completely detached from the concrete on the base 1 and the rising height is sufficient to avoid interfering with the subsequent concrete slumping. Stop rotating the handle 11 to complete the removal of the slumping cylinder 4. During this process, the lifting structure 2 ensures that the slumping cylinder 4 is subjected to uniform force to avoid tilting and affecting the test results. Wait for the concrete to collapse naturally under its own weight, generally for 1-2 minutes, to ensure that the collapse is stable. Slide the connecting sleeve 6 on the sliding test column 5 to drive the horizontally set test rod 7 to move up and down. At the same time, the connecting sleeve 6 can be rotated 360° to adjust the horizontal position of the test rod 7 so that the lower surface of the test rod 7 is in contact with the top surface of the collapsed and stabilized concrete. Read the scale value at the position corresponding to the connecting sleeve 6 on the test column 5, record the concrete height data at this time, compare it with the initial height, and the difference between the two scale values ​​is the slump value of the concrete, so as to achieve rapid and accurate detection.

[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, material, 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, material, or apparatus.

[0041] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] 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 concrete slump testing device, comprising a base (1), characterized in that: The base (1) is provided with a lifting structure (2), and the bottom wall of the base (1) is provided with a vibrating motor (3) for compacting concrete. It also includes a slumping cylinder (4) that is detachably connected to the lifting structure (2). The base (1) is also provided with a test column (5) vertically and a scale is provided on the test column (5) along the height direction. The test column (5) is fitted with a connecting sleeve (6) that can slide up and down and rotate 360°. The connecting sleeve (6) is clearance-fitted with the test column (5), and a test rod (7) is horizontally provided on one side of the connecting sleeve (6). The lifting structure (2) includes a support frame (8) vertically mounted on the base (1). The support frame (8) has a lifting groove on one side and a lifting screw (9) rotates between the upper and lower walls of the lifting groove. A slide block (10) slides in the lifting groove and is threadedly connected to the lifting screw (9). A throttle handle (11) rotates on the top of the support frame (8) and is connected to the top of the lifting screw (9). The lifting groove is detachably connected to the collapse cylinder (4).

2. The concrete slump testing device according to claim 1, characterized in that: A feeding assembly is provided on the base (1). The feeding assembly includes a support column (12) vertically arranged on the base (1) and opposite to the support frame (8). A connecting ring (13) is rotatably provided on the top of the support column (12), and a horizontal support plate (14) is provided on the connecting ring (13). A storage bin (15) is provided at the other end of the horizontal support plate (14). A feed inlet is provided at the top of the storage bin (15), and the bottom of the storage bin (15) is... The storage bin (15) is equipped with a discharge pipe (16) and the discharge pipe passes through the horizontal support plate (14) at the lower end and extends downward. The storage bin (15) has a rotating feed shaft (17) on its inner top wall. The feed shaft (17) is equipped with a stirring rod (18) and a spiral feed blade (19). The spiral feed blade (19) is located at the position of the discharge pipe (16). The storage bin (15) is equipped with a feed motor (20) at the top and the motor power output shaft is connected to the feed shaft (17).

3. The concrete slump testing device according to claim 2, characterized in that: It also includes two sets of semi-circular positioning rings (21), the ends of the two sets of semi-circular positioning rings (21) are provided with complementary upper and lower bosses, and the bosses are provided with positioning through holes. The base (1) is provided with positioning pins (22) corresponding to the positioning through holes.

4. The concrete slump testing device according to claim 3, characterized in that: The upper outer wall of the collapse cylinder (4) is provided with a connector (23) and a plug (24) is provided on the connector (23). The slide (10) is provided with a slot corresponding to the plug (24). The plug (24) and the slot are fixed together by bolts.

5. The concrete slump testing device according to claim 4, characterized in that: The test column (5) and support column (12) are all welded with reinforcing ribs (25) at the connection points with the base (1).

6. The concrete slump testing device according to claim 5, characterized in that: The base (1) has support pads (26) at the four corners of its bottom. The support pads (26) are made of anti-slip and shock-absorbing rubber.

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