A cement density testing device

Abstract

This utility model provides a cement density testing device, belonging to the field of testing technology, to solve the technical problems of slow filling speed and pipe blockage during cement density testing. It includes: a Leigh flask, with a volumetric cavity at the bottom, the neck of which gradually narrows to a fine neck, an expansion cavity in the middle of the fine neck, and a trumpet-shaped neck opening at the upper end of the fine neck; a magnetically adsorbable base plate embedded at the bottom of the Leigh flask; a funnel located at the neck opening, with its outlet matching the fine neck of the Leigh flask; and a spiral guide vane, comprising a mandrel, a limiting ring, and spiral blades. The spiral blades are spirally arranged along the mandrel, and the limiting ring is located at one end of the mandrel and fixedly connected to it. The diameter of the limiting ring is larger than the aperture of the fine neck. The mandrel and spiral blades of the spiral guide vane can be inserted into the funnel and the Leigh flask. This device improves the efficiency and accuracy of cement density testing.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, specifically to a cement density detection device. Background Technology

[0002] In testing and inspection of highway engineering and concrete-related fields, cement density testing is a crucial step, as its results directly affect the scientific accuracy and precision of concrete mix design, playing a fundamental role in project quality. According to relevant standards, density is currently primarily calculated by measuring cement volume using a Leigh flask, thus providing key parameters for concrete mix design.

[0003] The traditional Lee's bottle method requires adding cement in small, repeated additions while manually shaking the bottle to release air. This process is slow and often results in cement clogging the pipes. Furthermore, air between cement particles is difficult to expel completely, leading to localized loose or insufficiently compacted areas, severely impacting the accuracy of volume measurements. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model proposes a cement density detection device to solve the technical problems of slow filling speed and frequent cement blockage in the pipeline when cement is put into the bottle.

[0005] The technical solution adopted in this utility model is: a cement density testing device, comprising: The Leigh bottle has a volumetric cavity at the bottom, a narrow neck that gradually narrows at the bottom, an expansion cavity in the middle of the narrow neck, and a flared neck at the upper end of the narrow neck. The bottom of the Leigh bottle is fitted with a base plate that can be magnetically attracted. A funnel, wherein the funnel is located at the neck, and the outlet end of the funnel matches the narrow neck of the Leigh flask; It also includes a spiral guide vane, which includes a mandrel, a limiting ring, and spiral blades. The spiral blades are spirally arranged along the mandrel. The limiting ring is located at one end of the mandrel and is fixedly connected to the mandrel. The diameter of the limiting ring is larger than the aperture of the narrow neck. The mandrel and spiral blades of the spiral guide vane can be inserted into the funnel and the Leigh flask. The limiting ring of the spiral guide vane contacts the inner surface of the funnel and can prevent the spiral guide vane from falling into the Leigh flask.

[0006] Optionally, it also includes a wobbling base and a wobbling drive mechanism for driving the wobbling base to wobble, wherein the wobbling base is provided with a magnetic suction component for adsorbing the bottom plate of the Leigh flask.

[0007] Optionally, the wobbling drive mechanism includes a base plate, an adjusting plate, and a rotational power source; the adjusting plate is inclined relative to the base plate and is located between the wobbling base and the base plate; the wobbling base has a protruding post on the side facing the adjusting plate that can contact the adjusting plate; the wobbling base also has a drive shaft on the side facing the adjusting plate, the drive shaft passes through a hole in the base plate, the drive shaft can slide axially or rotate circumferentially relative to the base plate, and the drive shaft is driven by the rotational power source.

[0008] Optionally, the drive shaft has teeth on its outer periphery, and a gear ring that meshes with the teeth of the drive shaft is fitted on the outer periphery of the drive shaft. The gear ring is rotatably connected to the base plate, and the drive shaft can slide axially relative to the gear ring. The gear ring is driven by a rotational power source.

[0009] Optionally, it also includes an adjusting column, which passes through the base plate and abuts against the adjusting plate, and the adjusting plate is also hinged to the base plate; the adjusting column is threadedly engaged with the base plate and can adjust the tilt angle of the adjusting plate.

[0010] Optionally, the outer circumference of the gear ring is a pulley structure, and the main shaft of the rotary power source is provided with a pulley, and the power is transmitted between the pulley structure and the pulley through a transmission belt.

[0011] Optionally, it also includes a housing, wherein the wobbling base and wobbling drive mechanism are vertically and vertically connected to the side wall of the housing.

[0012] Optionally, the swaying drive mechanism is vertically slidably connected to the side wall of the housing, and the housing may also be provided with a lead screw driven by a power source, the lead screw being vertically arranged and threadedly engaged with the swaying drive mechanism.

[0013] Optionally, the tank may be equipped with a heating component, and the tank may contain water and be heated by the heating component.

[0014] Optionally, the enclosure may be made of a transparent material.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: With a dedicated funnel and built-in spiral guide vanes, it effectively solves the problems of slow filling speed and easy pipe blockage. The spiral guide vanes guide the cement to fall evenly, avoiding accumulation, and combined with the vibration-assisted base, it accelerates particle settling and air bubble discharge, significantly shortening the operation time. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall device.

[0018] Figure 2 This is a frontal view of the device.

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 This is a schematic diagram showing the assembly of the Lee's bottle, funnel, and spiral guide vane.

[0021] Figure 5 This is a schematic diagram of a spiral guide vane.

[0022] Reference numerals: 1. Lee's bottle, 11. Volume chamber, 12. Expansion chamber, 13. Neck, 14. Base plate, 2. Funnel, 3. Spiral guide vane, 31. Mandrel, 32. Limiting ring, 33. Spiral blade, 4. Shaking base, 41. Protruding column, 42. Drive shaft, 5. Shaking drive mechanism, 51. Base plate, 52. Adjusting plate, 53. Rotational power source, 54. Adjusting column, 6. Gear ring, 7. Transmission belt, 8. Lead screw, 9. Heating assembly. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] A cement density testing device, please refer to the appendix. Figure 1 One possible implementation method is as follows: Leigh bottle 1 has a volume chamber 11 at the bottom. The bottleneck of the volume chamber 11 gradually narrows and then a narrow neck is provided. An expansion chamber 12 is provided in the middle of the narrow neck. The expansion chamber 12 can hold more liquid than the narrow neck to prevent the liquid level from rising and overflowing the Leigh bottle. A trumpet-shaped neck 13 is provided at the upper end of the narrow neck. A bottom plate 14, such as an iron sheet, is embedded in the bottom of the Leigh bottle 1. Funnel 2 is located at the neck 13. The outlet of funnel 2 matches the narrow neck of Leigh bottle 1. Funnel 2 is used to add cement (powder). It also includes a spiral guide vane 3, which includes a spindle 31, a limiting ring 32, and a spiral blade 33. The spiral blade 33 is spirally arranged along the spindle 31. The limiting ring 32 is located at one end of the spindle 31 and is fixedly connected to the spindle 31. The diameter of the limiting ring 32 is larger than the aperture of the narrow neck. The spindle 31 and the spiral blade 33 of the spiral guide vane 3 can be inserted into the funnel 2 and the Leigh bottle 1. The limiting ring 32 of the spiral guide vane 3 contacts the inner surface of the funnel 2 and can prevent the spiral guide vane 3 from falling into the Leigh bottle 1.

[0026] Cement density measurement process: First, clean and dry the Leigh flask 1. Pour anhydrous kerosene into the volume chamber 11 of the Leigh flask 1 to the specified mark and record the initial volume reading. Place the funnel 2 at the neck 13 of the Leigh flask 1 and slowly pour the cement powder sample into the Leigh flask 1 through the funnel 2. To prevent cement from clogging at the narrow neck, insert the spiral guide vane 3 into the funnel 2 and the Leigh flask 1. The spindle 31 and its spiral blades 33 of the spiral guide vane 3 guide the cement to slide smoothly. If necessary, manually rotate the spiral guide vane 3 so that its limiting ring 32 contacts the inner surface of the funnel 2 to prevent the spiral guide vane 3 from falling into the Leigh flask 1. After all the cement has been added, place the Leigh flask 1 in a constant temperature water bath for a certain period of time to ensure that the cement is fully immersed in the anhydrous kerosene. Air bubbles can also be removed by shaking. After the temperature stabilizes, remove the Leigh flask 1, wipe the outer wall dry, and record the total volume reading of the liquid and cement in the Leigh flask 1 at this time. The volume of cement is obtained by the difference between two volume readings. Combined with the known mass of cement (which can be weighed before being added), the density of the cement is calculated using the density formula. The method of using a Leigh flask to test the density of cement is existing technology. The core of this solution lies in the improvement of the related equipment, not the measurement method. The above description of the measurement process is only for the purpose of understanding this solution.

[0027] The beneficial effects of this device are as follows: A magnetically adsorbable base plate 14 is embedded at the bottom of the Leigh flask 1, allowing for convenient fixation of the flask 1 during measurement, ensuring its stability and reducing measurement errors or even tipping caused by shaking. The funnel 2 is positioned at the neck 13, with its outlet matching the narrow neck of the Leigh flask 1, facilitating accurate cement filling. The combination of the core shaft 31, spiral blade 33, and limiting ring 32 of the spiral guide vane 3 effectively prevents cement blockage at the narrow neck, ensuring smooth cement entry into the volume chamber 11 of the Leigh flask 1, guaranteeing uniform and smooth cement addition, and improving measurement accuracy and efficiency.

[0028] In one possible implementation, see Appendix Figure 1It also includes a wobbling base 4 and a wobbling drive mechanism 5 for driving the wobbling base 4 to wobble. The wobbling base 4 is provided with a magnetic attraction assembly for attracting the bottom plate 14 of the Leigh bottle 1. A permanent magnet or an electromagnet can be used. The wobbling drive mechanism 5 includes a base plate 51, an adjusting plate 52 and a rotational power source 53. The adjusting plate 52 is inclined relative to the base plate 51 and is located between the wobbling base 4 and the base plate 51. The wobbling base 4 has a protruding post 41 on the side facing the adjusting plate 52 that can contact the adjusting plate 52. The wobbling base 4 also has a drive shaft 42 on the side facing the adjusting plate 52. The drive shaft 42 passes through a hole in the base plate 51 and can slide axially or rotate circumferentially relative to the base plate 51. The drive shaft 42 is driven by the rotational power source 53. In one possible implementation, the outer periphery of the drive shaft 42 is provided with teeth, and a gear ring 6 that meshes with the teeth of the drive shaft 42 is sleeved on the outer periphery of the drive shaft 42. The gear ring 6 is rotatably connected to the base plate 51, and the drive shaft 42 can slide axially relative to the gear ring 6. The gear ring 6 is driven by a rotational power source 53.

[0029] Shaking Principle: The device drives the shaking base 4 to shake via a shaking drive mechanism 5. In the shaking drive mechanism 5, an adjusting plate 52 is inclined relative to the base plate 51 and located between the shaking base 4 and the base plate 51. The shaking base 4 has a protruding post 41 on the side facing the adjusting plate 52 that can contact the adjusting plate 52. Simultaneously, the drive shaft 42 of the shaking base 4 passes through a hole in the base plate 51 and can slide or rotate axially relative to the base plate 51, driven by a rotary power source 53. When the rotary power source 53 drives the drive shaft 42 to rotate, the shaking base 4 rotates accordingly. Due to the inclination of the adjusting plate 52, the protruding post 41 of the shaking base 4 contacts the adjusting plate 52 during rotation, causing the shaking base 4 to move longitudinally synchronously while rotating, thus achieving shaking. The shaking base 4 is equipped with a magnetic suction component that can attract the bottom plate 14 of the Leigh flask 1, thereby causing the Leigh flask 1 to shake together.

[0030] Beneficial effects: During cement density measurement, after cement is added to the Leigh flask 1 and immersed in anhydrous kerosene, air bubbles may adhere to the surface of the cement particles or the inner wall of the Leigh flask 1. These air bubbles can affect the accuracy of the volume measurement, ultimately leading to deviations in the cement density measurement results. The shaking base 4 and shaking drive mechanism 5 of this device can shake the Leigh flask 1, allowing air bubbles to quickly detach from the surface of the cement particles or the inner wall of the Leigh flask 1 and be expelled. This effectively reduces the interference of air bubbles on the measurement results and improves the accuracy and reliability of cement density measurement.

[0031] In one possible implementation, an adjusting column 54 is also included. The adjusting column 54 passes through the base plate 51 and abuts against the adjusting plate 52, which is also hinged to the base plate 51. The adjusting column 54 is threadedly engaged with the base plate 51 and can adjust the tilt angle of the adjusting plate 52. This device, with the adjusting column 54 passing through the base plate 51 and abutting against the adjusting plate 52, and the adjusting plate 52 hinged to the base plate 51, and the adjusting column 54 threadedly engaged with the base plate 51 to adjust the tilt angle of the adjusting plate 52, offers several advantages. During cement density measurement, by changing the tilt angle of the adjusting plate 52 through the adjusting column 54, the longitudinal movement amplitude of the shaking base 4 during rotation can be adjusted, thereby changing the up-and-down shaking amplitude of the Leigh bottle 1. In this way, the shaking amplitude can be flexibly controlled according to the specific characteristics of the cement, ensuring that air bubbles are fully and quickly expelled, while avoiding adverse effects on the Leigh bottle 1 or the internal cement-kerosene mixture due to excessive shaking. This effectively improves the accuracy and reliability of cement density measurement and enhances the applicability and practicality of the device.

[0032] In one possible implementation, the outer periphery of the gear ring 6 is a pulley structure, and a pulley is provided on the main shaft of the rotating power source 53. Power is transmitted between the pulley structure and the pulley through a transmission belt 7.

[0033] In one possible implementation, the device further includes a housing, a shaking base 4, and a shaking drive mechanism 5, which are vertically and vertically connected to the side wall of the housing. The shaking drive mechanism 5 is vertically slidably connected to the side wall of the housing. A lead screw 8, driven by a power source, is also installed inside the housing. The lead screw 8 is vertically positioned and threadedly engaged with the shaking drive mechanism 5. A heating element 9 is installed inside the housing, which can hold water and heat it. The housing is made of transparent material. The shaking base 4 and the shaking drive mechanism 5 can be raised and lowered along the side wall of the housing via their threaded engagement with the lead screw 8, facilitating position adjustment. The housing can hold water and be heated by the heating element 9 to create a water bath environment, allowing the Leyborg bottle 1 to be measured in a stable temperature field, reducing errors. Simultaneously, integrating shaking and heating functions into the housing increases the device's integration (it can be raised out of the water bath range during shaking), and eliminates the need to move the Leyborg bottle 1 during measurement. The transparent housing facilitates observation, improving the convenience and accuracy of the measurement.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cement density testing device, characterized in that, include: The Leigh bottle (1) has a volume chamber (11) at the bottom. The bottleneck of the volume chamber (11) gradually narrows and then a thin neck is provided. An expansion chamber (12) is provided in the middle of the thin neck. A trumpet-shaped neck mouth (13) is provided at the upper end of the thin neck. A bottom plate (14) that can be magnetically attracted is embedded in the bottom of the Leigh bottle (1). Funnel (2), the funnel (2) is located at the neck (13), and the outlet of the funnel (2) matches the narrow neck of the Lee's bottle (1); It also includes a spiral guide vane (3), which includes a spindle (31), a limiting ring (32) and a spiral blade (33). The spiral blade (33) is spirally arranged along the spindle (31). The limiting ring (32) is disposed at one end of the spindle (31) and fixedly connected to the spindle (31). The diameter of the limiting ring (32) is larger than the aperture of the narrow neck. The spindle (31) and the spiral blade (33) of the spiral guide vane (3) can be inserted into the funnel (2) and the Leigh bottle (1). The limiting ring (32) of the spiral guide vane (3) contacts the inner surface of the funnel (2) and can prevent the spiral guide vane (3) from falling into the Leigh bottle (1).

2. The cement density testing device as described in claim 1, characterized in that: It also includes a swaying base (4) and a swaying drive mechanism (5) for driving the swaying base (4) to sway, wherein the swaying base (4) is provided with a magnetic suction assembly for adsorbing the bottom plate (14) of the Leigh bottle (1).

3. The cement density testing device as described in claim 2, characterized in that: The swaying drive mechanism (5) includes a base plate (51), an adjustment plate (52), and a rotational power source (53); The adjusting plate (52) is inclined relative to the base plate (51). The adjusting plate (52) is located between the rocking base (4) and the base plate (51). The rocking base (4) has a protruding column (41) on the side facing the adjusting plate (52) that can contact the adjusting plate (52). The wobbling base (4) is also provided with a drive shaft (42) on the side facing the adjustment plate (52). The drive shaft (42) passes through a hole on the base plate (51). The drive shaft (42) can slide axially or rotate circumferentially relative to the base plate (51). The drive shaft (42) is driven by the rotational power source (53).

4. The cement density testing device as described in claim 3, characterized in that: The drive shaft (42) has teeth on its outer periphery, and a gear ring (6) that meshes with the teeth of the drive shaft (42) is fitted on the outer periphery of the drive shaft (42). The gear ring (6) is rotatably connected to the base plate (51). The drive shaft (42) can slide axially relative to the gear ring (6). The gear ring (6) is driven by a rotational power source (53).

5. The cement density testing device as described in claim 3, characterized in that: It also includes an adjusting column (54), which passes through the base plate (51) and abuts against the adjusting plate (52), and the adjusting plate (52) is also hinged to the base plate (51); the adjusting column (54) is threadedly engaged with the base plate (51) and can adjust the tilt angle of the adjusting plate (52).

6. The cement density testing device as described in claim 4, characterized in that: The outer circumference of the gear ring (6) is a pulley structure, and the main shaft of the rotary power source (53) is provided with a pulley. The pulley structure and the pulley are connected by a transmission belt (7).

7. A cement density testing device as described in claim 2, characterized in that: It also includes a housing, and the swaying base (4) and swaying drive mechanism (5) are connected to the side wall of the housing in a height-reducing manner.

8. The cement density testing device as described in claim 7, characterized in that: The swaying drive mechanism (5) is vertically slidably connected to the side wall of the housing. The housing is also provided with a lead screw (8) driven by a power source. The lead screw (8) is vertically arranged and threadedly engaged with the swaying drive mechanism (5).

9. A cement density testing device as described in claim 7, characterized in that: The box is equipped with a heating component (9), which can hold water and heat the water by the heating component (9).

10. A cement density testing device as described in claim 7, characterized in that: The enclosure is made of transparent material.

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