Centrifugal concrete internal fiber content detection device
By using a centrifugal concrete fiber content detection device, which separates fibers from the concrete matrix using a centrifuge cylinder and sieve holes, and combining motor drive and tensile sensor, the problem of labor-intensive fiber content detection is solved, achieving efficient automation and accurate measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU CONCRETE CEMENT PROD RSCH INST TEST CTR CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-26
AI Technical Summary
Current fiber content testing technologies are labor-intensive and inefficient.
A centrifugal concrete fiber content detection device is used to separate fibers from the concrete matrix through a centrifuge cylinder and sieve holes, and the fiber weight is measured by combining motor drive and tensile sensor.
It achieves efficient and automated separation of fibers from the concrete matrix, saving manpower, improving testing efficiency, and accurately measuring fiber content.
Smart Images
Figure CN224416645U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of concrete testing technology, and in particular to a centrifugal concrete fiber content testing device. Background Technology
[0002] Adding fibers to concrete has become an important means of improving its crack resistance, toughness, and durability. With the increasing application of fiber-reinforced concrete, the demand for accurate measurement of its fiber content is growing.
[0003] The most common testing method is for workers to select a fixed amount of concrete sample, place it in a filter basket, immerse the filter basket in clean water and shake it back and forth. The cement and aggregates such as sand and gravel in the concrete can be leaked out through the filter basket, while the fibers remain in the filter basket. After removing the fibers from the filter basket and drying them, the sample is placed on a weighing device to obtain the fiber content.
[0004] However, this manual fiber sorting method is labor-intensive and has obvious shortcomings. Utility Model Content
[0005] To reduce the manpower required for fiber content testing, this application provides a centrifugal concrete fiber content testing device.
[0006] The centrifugal concrete fiber content detection device provided in this application adopts the following technical solution:
[0007] A centrifugal concrete fiber content testing device includes a hollow testing barrel with an open top. A hollow centrifuge cylinder with an open top is placed inside the testing barrel. The centrifuge cylinder is used to hold concrete samples and is densely covered with sieve holes. A drive assembly for driving the centrifuge cylinder to rotate is arranged on the testing barrel. A drain pipe is also connected to the bottom of the testing barrel, and a drain valve is arranged on the drain pipe.
[0008] By adopting the above technical solution, workers select an appropriate amount of concrete sample and pour it into a centrifuge. Then, an appropriate amount of water is added to the testing container. The drive unit then rotates the centrifuge, causing the concrete inside to gradually disperse under the influence of the water. The sand and cement in the concrete pass through the sieve holes into the testing container under centrifugal force. The drain valve is then opened, and the cement, sand, and other materials are discharged with the water, while the fibers remain inside the centrifuge. This method replaces manual labor for separating the fibers and the concrete matrix, saving manpower and achieving high screening efficiency.
[0009] Optionally, the drive assembly includes a motor disposed at the bottom of the detection barrel and electrically connected to the control system. The output shaft of the motor extends into the detection barrel. A circular bearing ring is placed inside the detection barrel. The bearing ring is coaxially connected to the output shaft of the motor. The diameter of the bearing ring gradually decreases along the direction near the midpoint of its height. A plurality of elastic clamping arms are arranged circumferentially at the bottom of the centrifuge barrel to abut against the outer circumferential wall of the bearing ring.
[0010] By adopting the above technical solution, multiple elastic clamping arms at the bottom of the centrifuge drum are held against the outer circumferential wall of the supporting ring. This controls the motor to start, and the motor's output shaft drives the centrifuge drum to rotate, thereby realizing the centrifugal screening of fibers and concrete matrices. After screening, the worker pulls the centrifuge drum upwards, causing the elastic clamping arms to deform and disengage from the supporting ring, making it convenient for the worker to remove the fibers and reload.
[0011] Optionally, the outer circumferential wall of the bearing ring is provided with a plurality of bearing arms, and the bottom of the centrifuge cylinder is placed on each bearing arm.
[0012] By adopting the above technical solution, multiple support arms work together to support the bottom of the centrifuge tube, which helps improve the stability of the centrifuge tube during rotation. The output shaft of the motor drives the support arms to rotate, and the support arms push the elastic arms to drive the centrifuge tube to rotate, reducing the possibility of slippage between the elastic arms and the support ring.
[0013] Optionally, the support arm extends to the outer circumferential wall of the centrifuge tube.
[0014] By adopting the above technical solution, multiple load-bearing arms work together to fit closely against the outer wall of the centrifuge tube, reducing the possibility of axial displacement during centrifuge tube rotation.
[0015] Optionally, each carrier arm is provided with a guide ramp for guiding the bottom of the centrifuge tube onto the carrier arm.
[0016] By adopting the above technical solution, the guide slope plays a guiding role in the placement of the centrifuge tube, so that the centrifuge tube can be smoothly placed between multiple support arms.
[0017] Optionally, the top of the centrifuge cylinder is provided with two handles symmetrically distributed about its axis, and the top of the detection barrel is provided with a hanging ring and a reversing wheel. The hanging ring and the reversing wheel are symmetrically distributed about the axis of the detection barrel. A tension sensor electrically connected to the control system is arranged on the outer wall of the detection barrel, opposite to the reversing wheel. The sensing end of the tension sensor is attached to a pull wire, which passes around the reversing wheel and the two handles in sequence and is attached to a hook that is hung on the hanging ring.
[0018] By adopting the above technical solution, after screening, the worker manually lifts the centrifuge cylinder upwards to a suspended position, then passes the pull line around the reversing wheel and through the two handles, and finally attaches the hook to the hanging ring. At this time, the gravity of the centrifuge cylinder, fiber, elastic clamp arm, etc. acts on the pull line, and the tension sensor can measure the magnitude of the tension. After removing the self-weight of the centrifuge cylinder and elastic clamp arm, the weight of the limit can be calculated, and thus the fiber content in the concrete can be measured.
[0019] Optionally, the top of the centrifuge cylinder is hinged with a cap, and a magnetic plate is attached to the cap away from the position where it is hinged to the centrifuge cylinder by a cloth tape. The magnetic plate is magnetically attracted to the centrifuge cylinder.
[0020] By adopting the above technical solution, the magnetic plate adheres tightly to the outer wall of the centrifuge cylinder, so that the cap is tightly closed on the centrifuge cylinder, reducing the possibility of the fibers inside the centrifuge cylinder being accidentally thrown out during the spin-drying process.
[0021] Optionally, the outer wall of the centrifuge tube is provided with vertically arranged positioning ribs for alignment with the bearing arm.
[0022] By adopting the above technical solution, when the centrifuge tube is placed into the test barrel, the positioning rib is aligned with the bearing arm, so that the elastic arm can be smoothly engaged with the bearing ring.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. Workers select an appropriate amount of concrete sample and pour it into a centrifuge. Then, an appropriate amount of water is added to the testing container. The drive unit then rotates the centrifuge. The concrete inside the centrifuge gradually disperses under the influence of the water. The sand and cement in the concrete pass through the sieve holes into the testing container under centrifugal force. The drain valve is then opened, and the cement, sand, etc., are discharged with the water, while the fibers remain inside the centrifuge. This method replaces manual separation of fibers and the concrete matrix, saving manpower and achieving higher screening efficiency.
[0025] 2. Multiple elastic clamping arms at the bottom of the centrifuge drum are held against the outer circumference of the support ring, thereby controlling the motor to start. The motor's output shaft drives the centrifuge drum to rotate, thus achieving centrifugal screening of the fiber and concrete matrix. After screening, the worker pulls the centrifuge drum upwards, causing the elastic clamping arms to deform and disengage from the support ring, facilitating the worker to remove the fiber and reload the material.
[0026] 3. After screening, the worker manually lifts the centrifuge cylinder upwards to a suspended position, then passes the pull line around the reversing wheel and through the two handles, and finally attaches the hook to the hanging ring. At this time, the weight of the centrifuge cylinder, fiber, elastic clamp arm, etc., acts on the pull line, and the tension sensor can measure the magnitude of the tension. After removing the weight of the centrifuge cylinder and elastic clamp arm, the weight of the limit can be calculated, and thus the fiber content in the concrete can be measured. Attached Figure Description
[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0028] Figure 2 This is a cross-sectional view showing the positional relationship between the support arm, centrifuge cylinder, and support ring in an embodiment of this application.
[0029] Figure 3 This is a cross-sectional view of the weighing state in the embodiments of this application.
[0030] Explanation of reference numerals in the attached drawings: 1. Testing barrel; 2. Centrifuge cylinder; 201. Sieve hole; 3. Drain pipe; 4. Drain valve; 51. Motor; 52. Bearing ring; 53. Elastic clamping arm; 54. Bearing clamping arm; 55. Guide slope; 6. Handle; 7. Hanging ring; 8. Reversing wheel; 9. Tension sensor; 10. Pull line; 11. Hook; 12. Cover; 13. Fabric tape; 14. Magnetic plate; 15. Positioning rib. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0032] This application discloses a centrifugal concrete fiber content detection device.
[0033] Reference Figure 1 and Figure 2 The centrifugal concrete fiber content detection device includes a detection bucket 1 and a centrifuge cylinder 2 coaxially placed inside the detection bucket 1. Both the detection bucket 1 and the centrifuge cylinder 2 are hollow inside and open at the top.
[0034] Reference Figure 2 Centrifuge cylinder 2 is used to carry concrete samples and is densely covered with sieve holes 201. A cap 12 is hinged to the top of centrifuge cylinder 2. A magnetic plate 14 is attached to the cap 12 away from the hinge point with centrifuge cylinder 2 by a cloth tape 13. The magnetic plate 14 is used to magnetically attract centrifuge cylinder 2.
[0035] Reference Figure 1 and Figure 2 The test tank 1 is equipped with a drive assembly for driving the centrifuge 2 to rotate. The bottom of the test tank 1 is also connected to a drain pipe 3. A drain valve 4, which is electrically connected to the control system, is threaded onto the drain pipe 3. The drain valve 4 is a solenoid valve in the prior art.
[0036] Reference Figure 1 and Figure 2 Workers select an appropriate amount of concrete sample and put it into centrifuge cylinder 2. Then, centrifuge cylinder 2 is placed in test container 1. After pouring in an appropriate amount of water, the drive component drives centrifuge cylinder 2 to rotate. Under the combined action of water and centrifugal force, the concrete in centrifuge cylinder 2 gradually disperses, and small-diameter components such as sand, gravel and cement pass through the sieve holes 201 into test container 1.
[0037] Reference Figure 1 and Figure 2 After a period of time, the control system opens the drain valve 4, allowing the sand and cement to be discharged from the test tank 1 with the water. At the same time, the workers rinse the centrifuge drum 2 with clean water, leaving clean fibers inside. The drive assembly continuously drives the centrifuge drum 2 to rotate, thereby drying the fibers inside the centrifuge drum 2.
[0038] Reference Figure 2 and Figure 3 The drive assembly includes a motor 51 bolted to the bottom of the detection barrel 1 and electrically connected to the control system. The output shaft of the motor 51 extends into the detection barrel 1 and is coaxially bolted to a bearing ring 52 via a flange. The diameter of the bearing ring 52 decreases along the direction near the midpoint of its height. Multiple elastic clamping arms 53 are circumferentially welded to the bottom of the centrifuge barrel 2 to abut against the outer circumferential wall of the bearing ring 52.
[0039] Reference Figure 2 and Figure 3 Multiple support arms 54 are welded circumferentially to the outer circumferential wall of the support ring 52, and the bottom of the centrifuge cylinder 2 is placed on each support arm 54. The support arms 54 extend to the outer circumferential wall of the centrifuge cylinder 2, and each support arm 54 is provided with a guide ramp 55.
[0040] Reference Figure 2 and Figure 3 When placing the centrifuge tube 2, the guide slope 55 accurately guides the centrifuge tube 2 to be placed between each of the support arms 54. During this process, the elastic arms 53 deform and multiple elastic arms 53 cooperate to clamp on the support ring 52.
[0041] Reference Figure 2 and Figure 3 Workers start motor 51 through the control system. The output shaft of motor 51 drives the bearing ring 52 and bearing clamp arm 54 to rotate through the flange. The bearing clamp arm 54 pushes the elastic clamp arm 53 to drive the centrifuge cylinder 2 to rotate synchronously, thereby realizing the centrifugal screening of fiber and concrete matrix.
[0042] Reference Figure 2 and Figure 3After the initial discharge of concrete wastewater from the drain pipe 3, the motor 51 is turned off. Then, the workers rinse the centrifuge drum 2 with clean water to remove any remaining wastewater. The motor 51 is then restarted, at which point the water remaining on the fibers can be spun dry.
[0043] Reference Figure 2 and Figure 3 The top of the centrifuge cylinder 2 is welded with two handles 6 that are symmetrically distributed about its axis. The test barrel 1 is bolted with a hanging ring 7 and a reversing wheel 8, which are symmetrically distributed about the axis of the test barrel 1.
[0044] Reference Figure 2 and Figure 3 A tension sensor 9, which is electrically connected to the control system, is attached to the outer wall of the detection bucket 1 at a position below the reversing wheel 8. The sensing end of the tension sensor 9 is attached to a pull wire 10, which passes around the reversing wheel 8 and the two handles 6 in sequence and is attached to a hook 11.
[0045] Reference Figure 2 and Figure 3 After the centrifuge is spun dry, the worker manually pulls the centrifuge cylinder 2 upwards to disengage the elastic locking arm 53 from the bearing ring 52. Then, holding the hook 11, the worker pulls the cable 10 around the reversing wheel 8 and through the two handles 6, and finally hooks the hook 11 onto the hanging ring 7.
[0046] Reference Figure 2 and Figure 3 In the above manner, the centrifuge cylinder 2 is kept suspended. The weight of the centrifuge cylinder 2, the cap 12, the elastic clamp arm 53, and the fibers acts on the tension wire 10. The tension sensor 9 can detect the magnitude of the tension. Then, the control system removes the weight of the centrifuge cylinder 2, the cap 12, the elastic clamp arm 53, etc., so that the weight of the fibers can be obtained separately, and the fiber content in the concrete sample can be measured.
[0047] Reference Figure 2 and Figure 3 The outer wall of the centrifuge cylinder 2 is vertically welded with positioning ribs 15 for alignment with the bearing arm 54. Since the workers cannot directly observe the engagement point between the elastic arm 53 and the bearing ring 52, the alignment between the positioning ribs 15 and the bearing arm 54 makes the elastic arm 53 and the bearing arm 54 circumferentially misaligned, which facilitates the smooth engagement of the elastic arm 53 onto the bearing ring 52.
[0048] The implementation principle of the centrifugal concrete fiber content detection device in this application embodiment is as follows:
[0049] Workers select an appropriate amount of concrete sample and load it into centrifuge cylinder 2. Then, centrifuge cylinder 2 is placed on multiple bearing clamp arms 54. Multiple elastic clamp arms 53 are engaged with the bearing ring 52. After that, an appropriate amount of water is poured into the test bucket 1. Workers start motor 51 through the control system. The output shaft of motor 51 drives the bearing ring 52 and bearing clamp arms 54 to rotate through the flange. The bearing clamp arms 54 push the elastic clamp arms 53 to drive the centrifuge cylinder 2 to rotate synchronously.
[0050] The concrete sample inside centrifuge tube 2 gradually disperses under the combined action of water and centrifugal force. Small particles such as sand and cement pass through the sieve holes 201 into the test bucket 1. Then, the drain valve 4 is opened, and water is discharged through the drain pipe 3, which in turn carries out the sand and cement.
[0051] After rinsing with clean water, the motor 51 is restarted to remove residual water from the fibers inside the centrifuge drum 2. The worker manually pulls the centrifuge drum 2 upwards to disengage the elastic clamp 53 from the bearing ring 52. Then, holding the hook 11, the worker guides the pull line 10 around the reversing wheel 8 and through the two handles 6, finally attaching the hook 11 to the hanging ring 7. The tension sensor 9 detects the tension on the pull line 10. After removing the weight of the centrifuge drum 2, the cap 12, the elastic clamp 53, etc., the weight of the fibers can be obtained separately, thus determining the fiber content in the concrete sample.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A centrifugal concrete fiber content detection device, characterized in that: The test container (1) is hollow inside and open at the top. Inside the test container (1) is a centrifuge tube (2) which is also hollow inside and open at the top. The centrifuge tube (2) is used to carry concrete samples and is densely covered with sieve holes (201). A drive assembly for driving the centrifuge tube (2) to rotate is arranged on the test container (1). The bottom of the test container (1) is also connected to a drain pipe (3), and a drain valve (4) is arranged on the drain pipe (3).
2. The centrifugal concrete fiber content detection device according to claim 1, characterized in that: The drive assembly includes a motor (51) disposed at the bottom of the detection barrel (1) and electrically connected to the control system. The output shaft of the motor (51) extends into the detection barrel (1). A circular bearing ring (52) is placed inside the detection barrel (1). The bearing ring (52) is coaxially connected to the output shaft of the motor (51). The diameter of the bearing ring (52) gradually decreases along the direction close to the midpoint of its height. A plurality of elastic clamping arms (53) for abutting against the outer circumferential wall of the bearing ring (52) are arranged circumferentially at the bottom of the centrifuge tube (2).
3. The centrifugal concrete fiber content detection device according to claim 2, characterized in that: The outer circumferential wall of the bearing ring (52) is provided with a plurality of bearing arms (54), and the bottom of the centrifuge tube (2) is placed on each of the bearing arms (54).
4. The centrifugal concrete fiber content detection device according to claim 3, characterized in that: The bearing arm (54) extends to the outer circumferential wall of the centrifuge tube (2).
5. The centrifugal concrete fiber content detection device according to claim 3, characterized in that: Each support arm (54) is provided with a guide ramp (55) for guiding the bottom of the centrifuge tube (2) to be placed on the support arm (54).
6. The centrifugal concrete fiber content detection device according to claim 1, characterized in that: The top of the centrifuge (2) is provided with two handles (6) symmetrically distributed about its axis. The top of the detection barrel (1) is provided with a hanging ring (7) and a reversing wheel (8). The hanging ring (7) and the reversing wheel (8) are symmetrically distributed about the axis of the detection barrel (1). A tension sensor (9) electrically connected to the control system is arranged on the outer wall of the detection barrel (1) relative to the reversing wheel (8). The sensing end of the tension sensor (9) is attached with a pull wire (10). The pull wire (10) passes around the reversing wheel (8) and the two handles (6) in sequence and is attached with a hook (11) that is hung on the hanging ring (7).
7. The centrifugal concrete fiber content detection device according to claim 2, characterized in that: The top of the centrifuge tube (2) is hinged with a cover (12). A magnetic plate (14) is attached to the cover (12) away from the position where it is hinged to the centrifuge tube (2) via a cloth tape (13). The magnetic plate (14) is magnetically attracted to the centrifuge tube (2).
8. The centrifugal concrete fiber content detection device according to claim 3, characterized in that: The centrifuge tube (2) has vertically arranged positioning ribs (15) for alignment with the bearing arm (54) on its outer side wall.