Rapid cement adding equipment for cement density test
The cement density testing equipment, which combines a spiral feeder and an ultrasonic vibrator, solves the problems of slow filling and venting caused by the narrow neck structure of the Lee's bottle, enabling rapid cement filling and efficient venting, thus improving testing efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG TRANSPORTATION INST
- Filing Date
- 2025-07-04
- Publication Date
- 2026-05-19
AI Technical Summary
In existing cement density testing methods, the narrow neck structure of the Lee's bottle causes the cement filling process to be slow and makes it difficult to achieve efficient venting at the same time, resulting in low testing efficiency.
The system combines a spiral pusher and an ultrasonic vibrator to mechanically convey cement and simultaneously eliminate air bubbles. The adjustable speed motor and transmission mechanism enable precise adjustment of the feeding rate. The nested telescopic structure of the support rod, along with the fastening bolts, allows for rapid adaptation of the equipment height. The cross-groove clutch design ensures flexible switching between electric pushing and manual fine-tuning.
It enables rapid cement loading and efficient venting, significantly improving testing efficiency and data accuracy, and solving the problems of cumbersome and time-consuming operation in traditional methods.
Smart Images
Figure CN224263003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cement density testing technology, specifically a cement rapid loading device for cement density testing. Background Technology
[0002] Cement density testing is a crucial step in evaluating cement performance. Currently widely used standard methods (such as the "Test Procedures for Cement and Cement Concrete in Highway Engineering" JTG 3420-2020 and the "Technical Specification for Testing and Inspection of Concrete in Waterway Engineering" JTS / T 236-2019) are both based on the Leigh flask method. This method relies on the unique narrow-necked structure of the Leigh flask (neck diameter approximately 10 mm) and its high-precision graduations (accurate to 0.1 mL) to ensure the accuracy of the test results.
[0003] However, the narrow neck of the Leigh flask presents a significant efficiency bottleneck in practical operation. During testing, approximately 60g of cement must be slowly added to the Leigh flask containing kerosene using a spatula. When the cement particles reach the kerosene interface, they easily adhere to the inner wall of the neck due to the wetting effect of the kerosene. The operator must repeatedly tamp the cement with a thin wire, a time-consuming process that typically takes about an hour to ensure all the cement is submerged below the kerosene level. Furthermore, the subsequent manual shaking of the Leigh flask is necessary to remove air bubbles trapped between the cement particles, also consuming considerable time.
[0004] While existing technologies include auxiliary equipment for cement loading and air bubble removal, they generally have limitations. These devices typically treat loading and venting as separate steps, failing to effectively combine and synchronize them. Therefore, their effectiveness in improving cement loading speed and air bubble removal efficiency is less than ideal, failing to significantly improve overall operational efficiency. The narrow neck structure results in an extremely slow cement loading process, and the bottleneck adhesion problem caused by kerosene wetting is difficult to overcome, making it difficult to simultaneously achieve rapid loading and efficient venting. This leads to a lengthy and inefficient testing process. Utility Model Content
[0005] This invention addresses the technical problems existing in the prior art by providing a rapid cement loading device for cement density testing, which can simultaneously achieve rapid cement loading and efficient air venting, significantly improving the efficiency of cement density testing.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a cement rapid filling device for cement density testing, comprising a base, an ultrasonic vibrator, a support rod, and a spiral pusher rod. The ultrasonic vibrator is placed above the base to support a Leigh flask, which is placed on the ultrasonic vibrator. The support rod includes a first telescopic rod and a second telescopic rod that are nested and extend in sequence. A second bracket is installed at the end of the first telescopic rod, and a funnel is installed on the second bracket. The lower end of the funnel is connected to the mouth of the Leigh flask. A first bracket is installed at the end of the second telescopic rod, and a drive motor and a transmission mechanism are installed on the first bracket. The drive motor drives the rotation of the spiral pusher rod through the transmission mechanism. The spiral pusher rod coaxially passes through the funnel and extends into the Leigh flask.
[0007] A further aspect of this invention is that the transmission mechanism includes a driving wheel, a synchronous belt, and a driven wheel. The driving wheel is connected to the output shaft of the drive motor, and the driving wheel and the driven wheel are connected by a synchronous belt. A bearing is installed on the second bracket, and a hollow shaft is installed inside the bearing. One end of the hollow shaft is connected to the driven wheel, and the other end of the hollow shaft is connected to the rotating seat. The inner cavity of the hollow shaft is for the spiral push rod to pass through.
[0008] A further aspect of this invention is that the rotating seat is provided with a cross groove, and the upper end of the spiral pusher rod is a cylinder. The upper end of the cylinder of the spiral pusher rod is provided with a cross head that matches the cross groove. When the cross head is inserted into the cross groove, the spiral pusher rod is driven to rotate by a drive motor; when the cross head is disengaged from the cross groove, the spiral pusher rod can be rotated manually. During automatic feeding, the cross head is engaged in the cross groove, restricting the vertical position of the spiral pusher rod. The drive motor drives the spiral pusher rod to rotate via a synchronous belt transmission mechanism. During manual feeding, the cross head is moved out of the cross groove, and the spiral pusher rod is manually rotated to push the material.
[0009] A further aspect of this invention is that the spiral pusher is made of corrosion-resistant hard plastic.
[0010] A further aspect of this invention is that the drive motor is a speed-adjustable motor, and the speed of the drive motor can be controlled by a controller.
[0011] A further aspect of this invention is that leveling bolts are provided at the four corners of the base, thereby adjusting the levelness of the base by preventing bubble levels on the base.
[0012] A further aspect of this invention is that the first telescopic rod is nested within the support rod and slidably connected to the support rod, and the second telescopic rod is nested within the first telescopic rod and slidably connected to the first telescopic rod. The support rod and the first telescopic rod are respectively provided with fastening bolts for fixing the first telescopic rod and the second telescopic rod, and the height of the first telescopic rod and the second telescopic rod are respectively locked by the fastening bolts.
[0013] A further aspect of this invention is that the bottom of the support rod is fixed to the base by a disc and bolts, and the bottom end of the support rod is provided with a disc, which is fixed to the base by bolts evenly distributed around the circumference.
[0014] A further aspect of this invention is that the ultrasonic oscillator includes a housing and a transducer. The transducer is housed inside the housing, and a vibrating plate is positioned above the transducer. A circular groove is provided on the vibrating plate, and the bottom of the Leigh flask is placed within the circular groove. A rubber pad is provided at the bottom of the circular groove to prevent the Leigh flask from colliding and being damaged by the vibrating plate. The vibration level of the vibrating plate of the ultrasonic oscillator can be adjusted by a controller.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention replaces traditional manual feeding with mechanized conveying via a spiral pusher rod, combined with ultrasonic vibration to simultaneously eliminate air bubbles, effectively solving the bottleneck problem of cement adhesion caused by the narrow neck structure of the Leigh bottle. The transmission mechanism and adjustable speed motor work together to achieve precise adjustment of the feeding rate, and the nested telescopic structure of the support rod, combined with fastening bolts, enables rapid adaptation of the equipment height. The cross-groove clutch design ensures flexible switching between electric pushing and manual fine-tuning. This invention can simultaneously achieve rapid cement loading and efficient venting, solving the technical problems of cumbersome and time-consuming operation in the traditional Leigh bottle method, and significantly improving testing efficiency and data accuracy. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a three-dimensional schematic diagram of the device added to this utility model;
[0019] Figure 2 This is a top view of the device installed in this utility model;
[0020] Figure 3This is a side view of the device installed in this utility model;
[0021] Figure 4 This utility model Figure 3 A cross-sectional view along the AA direction.
[0022] In the diagram, 1. Base; 2. Funnel; 3. Support rod; 4. First telescopic rod; 5. Second telescopic rod; 6. First bracket; 7. Second bracket; 8. Transmission mechanism; 9. Rotating seat; 10. Leigh bottle; 11. Spiral pusher rod; 12. Ultrasonic vibrator; 13. Drive motor; 14. Driving wheel; 15. Driven wheel; 16. Synchronous belt; 17. Bearing; 18. Hollow shaft; 19. Cross block; 20. Cross groove; 21. Transducer; 22. Circular groove; 23. Rubber pad; 24. Fastening bolt; 25. Leveling bolt. Detailed Implementation
[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0024] like Figure 1-4 As shown, a cement rapid loading device for cement density testing includes a base 1, an ultrasonic vibrator 12, a support rod 3, and a spiral pusher rod 11.
[0025] The base 1 can be made of cast iron or welded steel plate, and is square in shape with rust prevention treatment on the surface.
[0026] An ultrasonic oscillator 12 is placed above a base 1 to support a Leigh flask 10, which is then placed on the ultrasonic oscillator 12. The ultrasonic oscillator 12 is prior art, and its working principle will not be described further in this patent. The ultrasonic oscillator 12 includes a housing and a transducer 21. The transducer 21 is housed within the housing, and a vibrating plate is positioned above it. A circular groove 22, 100mm in diameter and 36mm deep, is provided on the vibrating plate. The bottom of the Leigh flask 10 is placed within the circular groove 22, and a rubber pad 23 is provided at the bottom of the groove 22 to prevent the Leigh flask 10 from colliding and being damaged by the vibrating plate. The vibration intensity of the vibrating plate in the ultrasonic oscillator 12 can be adjusted by a controller. The housing serves as the outer shell of the ultrasonic oscillator 12, housing and protecting the internal components. The transducer 21 is the core component of the ultrasonic generator, capable of converting electrical energy into mechanical vibration. The vibrating plate is directly connected to the transducer 21 to transmit and amplify the vibration energy. The dimensions of the circular groove 22 match the bottom of the Leigh bottle 10, ensuring its stability during vibration. The rubber pad 23 provides cushioning and anti-slip properties, protecting the bottom of the Leigh bottle 10 and enhancing vibration transmission efficiency. The ultrasonic vibrator 12 ensures that cement particles are simultaneously subjected to ultrasonic vibration during loading, effectively preventing adhesion at the bottle neck and promoting rapid air bubble removal.
[0027] The support rod 3 includes a first telescopic rod 4 and a second telescopic rod 5 nested together. A second bracket 7 is installed at the end of the first telescopic rod 4, and a funnel 2 is installed on the second bracket 7. The lower end of the funnel 2 is connected to the mouth of the Leigh flask 10. A first bracket 6 is installed at the end of the second telescopic rod 5. A drive motor 13 and a transmission mechanism 8 are installed on the first bracket 6. The drive motor 13 drives the rotation of the spiral push rod 11 through the transmission mechanism 8. The spiral push rod 11 coaxially passes through the funnel 2 and extends into the Leigh flask 10.
[0028] The telescopic structure of support rod 3 is height-locked by fastening bolt 24. The first telescopic rod 4 and the second telescopic rod 5 can be made of aluminum alloy to reduce weight. Funnel 2 has a conical structure, with the lower outlet diameter matching the mouth of Leigh flask 10. The funnel 2 has an upper diameter of 100mm, a depth of 60mm, and an outlet diameter of 10mm, and can be made of stainless steel or plastic. Drive motor 13 is preferably an adjustable speed motor with a speed range controlled between 50-300rpm. Transmission mechanism 8 can be made of gear or belt drive. The diameter of the spiral blades of spiral push rod 11 is slightly smaller than the inner diameter of Leigh flask 10. The blade spacing uses a long spiral to ensure that cement does not accumulate excessively on the blades, and can be made of corrosion-resistant materials such as polytetrafluoroethylene.
[0029] This technical solution achieves continuous cement conveying through a spiral pusher rod 11, while simultaneously utilizing ultrasonic vibration to promote cement particle dispersion and air bubble removal. Compared to manual feeding, the rotational motion of the spiral pusher rod 11 effectively prevents cement from sticking at the bottleneck, significantly improving the feeding speed. Any small amount of cement adhering to the blades of the spiral pusher rod 11 is brushed into the funnel 2 and falls into the Leigh flask 10 when the spiral pusher rod 11 is lifted. The cavitation effect generated by ultrasonic vibration breaks down the agglomeration between cement particles and accelerates the release of air bubbles. The telescopic structure of the support rod 3 facilitates adjustment of the height of the funnel 2 and the spiral pusher rod 11, adapting to different sizes of Leigh flasks 10. This equipment achieves simultaneous cement loading and air bubble removal, solving the problem of low efficiency in traditional methods.
[0030] like Figure 4 As shown, the transmission mechanism 8 includes a drive wheel 14, a synchronous belt 16, and a driven wheel 15. The drive wheel 14 is connected to the output shaft of the drive motor 13. The drive wheel 14 and the driven wheel 15 are connected by the synchronous belt 16. A bearing 17 is installed on the second bracket 7. A hollow shaft 18 is installed inside the bearing 17. One end of the hollow shaft 18 is connected to the driven wheel 15, and the other end of the hollow shaft 18 is connected to the rotating seat 9. The inner cavity of the hollow shaft 18 allows the spiral push rod 11 to pass through.
[0031] Specifically, the driving wheel 14 and driven wheel 15 can be toothed synchronous wheels, the bearing 17 is preferably a deep groove ball bearing 17, and the hollow shaft 18 can be made of stainless steel with an inner diameter slightly larger than the diameter of the screw pusher 11 to ensure that the screw pusher 11 can rotate freely. The rotating seat 9 and the hollow shaft 18 can be connected by a key or a flange. The connection between the driven wheel 15 and the hollow shaft 18 can be an interference fit or a key connection.
[0032] like Figure 2 , Figure 4 As shown, the rotating seat 9 is provided with a cross groove 20, and the upper end of the spiral push rod 11 is a cylinder. The upper end of the cylinder of the spiral push rod 11 is provided with a cross head 19 that matches the cross groove 20. When the cross head 19 is inserted into the cross groove 20, the spiral push rod 11 is driven to rotate by the drive motor 13; when the cross head 19 is disengaged from the cross groove 20, the spiral push rod 11 can be rotated manually.
[0033] Specifically, the depth of the cross groove 20 is 5-8mm, and the groove width forms a clearance fit with the thickness of the cross head 19, with the clearance controlled within the range of 0.05-0.1mm. The axial length of the cross head 19 is 1-2mm shorter than the depth of the cross groove 20 to facilitate rapid alignment and fitting.
[0034] Furthermore, the screw pusher 11 is made of corrosion-resistant hard plastic, with an inner diameter of 2-3 mm, an outer diameter of 7 mm for the screw blades, and a total length of 260 mm. This ensures that the bottom end is below the 0 mark on the Leigh flask 10. Before the test, the initial mark needs to be recorded, noting how much the Leigh flask mark drops when the screw pusher 11 is immersed in kerosene. This information is then added to the calculations to minimize systematic errors. Specifically, the corrosion-resistant hard plastic material can be engineering plastics such as polypropylene (PP), polytetrafluoroethylene (PTFE), or ultra-high molecular weight polyethylene (UHMWPE).
[0035] The drive motor 13 is an adjustable speed motor. It can dynamically adjust the rotation speed of the screw feeder 11 according to the type of cement and the feeding stage. A higher speed can be used in the initial feeding stage to achieve rapid filling, while the speed is reduced when the cement approaches the kerosene surface to prevent splashing. Specifically, the adjustable speed motor can be a DC brushed motor, a DC brushless motor, or an AC variable frequency motor. As a preferred embodiment, a servo motor with an encoder is used, and the speed is controlled by pulse signals, achieving a speed adjustment accuracy of ±1 rpm. Furthermore, speed control can be achieved through a potentiometer knob for stepless speed adjustment, or by selecting a fixed speed level via a preset button. For example, four speed levels within the range of 200-800 rpm can be set to correspond to the feeding speed requirements of different cement types.
[0036] like Figure 1 As shown, leveling bolts 25 are installed at the four corners below the base 1. This solves the problem of kerosene level reading error caused by equipment tilting during the Leybold bottle 10 test. The leveling bolts 25 can adopt a standard M8 or M10 bolt structure, and the bolt head has a cross groove 20 or an internal hexagonal groove for easy manual adjustment. As a preferred embodiment, a rubber anti-slip pad can be installed at the lower end of the bolt to prevent displacement during equipment operation. The leveling bolts 25 and the base 1 are connected by a threaded engagement to achieve height adjustment. Rotating the bolts changes their extension length, thereby achieving fine adjustment of the equipment's levelness.
[0037] The first telescopic rod 4 and the second telescopic rod 5 are respectively locked in height by fastening bolts 24. Specifically, the first telescopic rod 4 is nested inside the support rod 3 and slidably connected to the support rod 3. The bottom of the support rod 3 is fixed to the base 1 by a disc and bolts. Four evenly distributed threaded holes are provided at corresponding positions on the base 1. The bolt specifications are preferably M8 or M10. By screwing in the bolts, the disc can be firmly pressed onto the surface of the base 1. The second telescopic rod 5 is nested inside the first telescopic rod 4 and slidably connected to the first telescopic rod 4. The support rod 3 and the first telescopic rod 4 are respectively provided with fastening bolts 24 to fix the first telescopic rod 4 and the second telescopic rod 5. The fastening bolts 24 can be standard hexagonal head bolts or wing bolts to achieve quick fixing and adjustment of the height of the support rod 3. During the Leigh flask 10 method test, the operator can adjust the docking position of the funnel 2 and the bottle mouth by first adjusting the telescopic rod according to the height requirements of different specifications of Leigh flask 10, and then tighten the fastening bolts 24 to complete the positioning.
[0038] Working principle: The equipment adjusts the height of the spiral pusher rod 11 and the funnel 2 through the support rod 3, so that they are precisely aligned with the mouth of the Leigh bottle 10. The drive motor 13 drives the spiral pusher rod 11 to rotate through the synchronous belt 16 and the transmission mechanism 8, continuously conveying the cement in the funnel 2 into the Leigh bottle 10 in a spiral propulsion manner. The ultrasonic oscillator 12 generates high-frequency vibration synchronously during the feeding process, so that the cement particles are evenly dispersed in the kerosene and the bubbles are accelerated to detach. The telescopic structure of the support rod 3 can adapt to the operation requirements of different specifications of Leigh bottles 10. The spiral pusher rod 11 realizes the switching between electric and manual pushing modes through the clutch design of the cross groove 20 and the rotating seat 9. The leveling bolt 25 ensures that the Leigh bottle 10 is vertical to improve the measurement accuracy. The spiral pusher rod 11 made of corrosion-resistant material avoids chemical reaction with kerosene.
[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A cement rapid filling device for cement density testing, characterized in that: The device includes a base (1), an ultrasonic oscillator (12), a support rod (3), and a spiral pusher rod (11). The ultrasonic oscillator (12) is placed above the base (1) to support the Lee's bottle (10). The Lee's bottle (10) is placed on the ultrasonic oscillator (12). The support rod (3) includes a first telescopic rod (4) and a second telescopic rod (5) that are nested and extend in sequence. A second bracket (7) is installed at the end of the first telescopic rod (4). A funnel (2) is installed on the second bracket (7). The lower end of the funnel (2) is connected to the mouth of the Lee's bottle (10). A first bracket (6) is installed at the end of the second telescopic rod (5). A drive motor (13) and a transmission mechanism (8) are installed on the first bracket (6). The drive motor (13) drives the spiral pusher rod (11) to rotate through the transmission mechanism (8). The spiral pusher rod (11) coaxially passes through the funnel (2) and extends into the Lee's bottle (10).
2. The cement rapid loading device for cement density testing according to claim 1, characterized in that: The transmission mechanism (8) includes a drive wheel (14), a timing belt (16) and a driven wheel (15). The drive wheel (14) is connected to the output shaft of the drive motor (13). The drive wheel (14) and the driven wheel (15) are connected by the timing belt (16). A bearing (17) is installed on the second bracket (7). A hollow shaft (18) is installed inside the bearing (17). One end of the hollow shaft (18) is connected to the driven wheel (15), and the other end of the hollow shaft (18) is connected to the rotating seat (9). The inner cavity of the hollow shaft (18) is for the spiral push rod (11) to pass through.
3. The cement rapid loading device for cement density testing according to claim 2, characterized in that: The rotating seat (9) is provided with a cross groove (20), and the upper end of the spiral push rod (11) is a cylinder. The upper end of the cylinder of the spiral push rod (11) is provided with a cross head (19) that matches the cross groove (20). When the cross head (19) is embedded in the cross groove (20), the spiral push rod (11) is driven to rotate by the drive motor (13). When the cross head (19) is disengaged from the cross groove (20), the spiral push rod (11) can be rotated manually.
4. The cement rapid loading device for cement density testing according to claim 1, characterized in that: The spiral pusher rod (11) is made of corrosion-resistant hard plastic.
5. The cement rapid loading device for cement density testing according to claim 2, characterized in that: The drive motor (13) is an adjustable speed motor.
6. The cement rapid loading device for cement density testing according to claim 3, characterized in that: The base (1) is provided with leveling bolts (25) at the four corners below.
7. The cement rapid loading device for cement density testing according to claim 1, characterized in that: The height of the first telescopic rod (4) and the second telescopic rod (5) is locked by fastening bolts (24).
8. A cement rapid loading device for cement density testing according to claim 1, characterized in that: The bottom of the support rod (3) is fixed to the base (1) by a disc and bolts.
9. A cement rapid loading device for cement density testing according to any one of claims 1-8, characterized in that: The ultrasonic oscillator (12) includes a chassis and a transducer (21). The transducer (21) is installed inside the chassis. A vibrating plate is installed above the transducer (21). A circular groove (22) for positioning the Lee bottle (10) is installed on the vibrating plate. A rubber pad (23) is installed at the bottom of the circular groove (22).