A low water cement ratio cement paste viscosity measuring device

Abstract

The utility model provides a kind of low water cement ratio cement neat paste viscosity measuring device, including support frame, fixed mounting seat on support frame, detachable and vertically suspended setting's mar's funnel of mounting seat, with mounting seat connection and the temperature control sleeve of mar's funnel outside wall, be equipped with the measuring cup in mar's funnel below, control unit and timer installed on support frame;Mar's funnel inner chamber upper end is equipped with filter screen, side wall is equipped with temperature sensor, bottom is equipped with valve;Measuring cup is equipped with liquid level sensor;Temperature sensor is electrically connected with control unit, and control unit controls the temperature of temperature control sleeve;Liquid level sensor is electrically connected with control unit, and control unit controls the opening and closure of valve;Control unit controls the start-stop of timer.The low water cement ratio cement neat paste viscosity measuring device described in the utility model realizes the accurate measurement of cement neat paste viscosity by reducing manual intervention and constant temperature design.

Description

Technical Field

[0001] This utility model belongs to the field of building material performance testing technology, and in particular relates to a device for measuring the viscosity of cement paste with low water-cement ratio. Background Technology

[0002] In the preparation and application of cement-based materials, accurate measurement of the viscosity of cement paste is crucial for quality control and performance evaluation. Cement paste is a homogeneous slurry composed of cement and water. Current technology typically uses a Marvel funnel viscometer for viscosity measurement. The method involves placing a certain amount of the paste into a Marvel funnel, opening the funnel's valve, and simultaneously starting a stopwatch. The paste flows freely out of the funnel under gravity, and the time required for the liquid to reach the 946 ml (1 quart) mark in the measuring cup is measured. The viscosity is expressed as time (in seconds). This entire process requires manual intervention, leading to reliance on manual operation for accurate results and potentially unreliable accuracy. Furthermore, the manual operation is cumbersome. In addition, due to the high viscosity of low water-cement ratio cement paste, its flow time is relatively long. During this extended flow period, the temperature of the cement paste is easily affected by environmental factors. Temperature significantly impacts the viscosity of cement paste; temperature fluctuations can cause deviations in viscosity measurements, thus affecting the accurate evaluation of the cement paste's performance. Utility Model Content

[0003] In view of this, in order to solve the technical problems of high manual intervention and large errors caused by temperature changes in the existing cement paste viscosity measurement, this utility model proposes a low water-cement ratio cement paste viscosity measuring device that can reduce manual intervention and improve the accuracy of measurement by constant temperature control.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A low water-cement ratio cement paste viscosity measuring device includes a support frame, a mounting base fixed to the support frame, a detachable Marshall funnel mounted on the mounting base and vertically suspended, a temperature control sleeve connected to the mounting base and fitted over the outer wall of the Marshall funnel, a measuring cup located below the Marshall funnel, a control unit and a timer mounted on the support frame; the upper end of the inner cavity of the Marshall funnel is provided with a filter screen, a temperature sensor is provided on the side wall, and a valve is provided at the bottom; the measuring cup is provided with a liquid level sensor; the temperature sensor is electrically connected to the control unit, and the control unit controls the temperature of the temperature control sleeve; the liquid level sensor is electrically connected to the control unit, and the control unit controls the opening and closing of the valve; the control unit controls the start and stop of the timer.

[0006] The support frame serves as the foundation for the entire device, providing a stable installation platform and ensuring the stability of the device during the measurement process. The mounting base supports the Marshall funnel. The filter screen at the top of the Marshall funnel filters impurities to ensure smooth flow. The temperature sensor on the side wall monitors the temperature of the cement paste in real time, and the valve at the bottom controls the outflow of the cement paste. The temperature control sleeve maintains a constant temperature, reducing the influence of external temperature on the measurement results. The measuring cup receives the outflowing cement paste, and the liquid level sensor on it monitors changes in the liquid level within the measuring cup and feeds the signal back to the control unit. The control unit mainly includes a touch screen display, a controller, and a data processor, as well as a power supply unit, which can be powered by a solar battery.

[0007] Pour cement paste into the Marshall funnel until it reaches the bottom of the filter screen; the control unit opens the valve and simultaneously starts the timer; the cement paste flows into the measuring cup below. During the flow, the temperature sensor monitors the temperature of the cement paste in real time and transmits the signal to the control unit. The control unit controls the temperature control jacket to maintain or lower the temperature based on the temperature feedback, keeping the temperature of the cement paste constant; when the cement paste in the measuring cup reaches the 946ml mark, the level sensor sends a signal to the control unit, which then controls the valve to close and stops the timer. This yields the viscosity value expressed in seconds. Alternatively, the viscosity of the cement paste can be calculated from the known volume of the cement paste in the measuring cup.

[0008] Furthermore, the support frame includes a support base plate, a support top plate, and a support side plate connecting the support base plate and the support top plate; the mounting base is mounted on the support top plate; and the measuring cup is placed on the support base plate.

[0009] Furthermore, the support top plate has a mounting hole, the mounting base is fixed in the mounting hole, and the mounting base has a funnel insertion hole in the shape of a frustum; the Marshall funnel is inserted into the funnel insertion hole.

[0010] The Marsh funnel is inserted into the mounting base in a placement manner, which ensures stability while making installation and disassembly convenient.

[0011] Furthermore, the lower end face of the mounting base is provided with a mounting groove, and the side wall of the mounting groove is provided with an internal thread; the temperature control sleeve is frustum-shaped, and the inside is a frustum-shaped funnel insertion cavity that matches the shape of the Martens funnel; the top of the temperature control sleeve is provided with an insertion part that can be installed in the mounting groove, and the insertion part is provided with an external thread that is compatible with the internal thread.

[0012] The temperature control sleeve and the mounting base are detachably connected by a threaded connection. After the Marshall funnel is inserted into the temperature control sleeve, the temperature control sleeve can cover the main body of the Marshall funnel.

[0013] Furthermore, the temperature control sleeve includes an inner temperature control layer and an outer insulation layer; the temperature control layer is provided with a heating wire and a semiconductor cooling chip.

[0014] The temperature control jacket is powered by its own power supply or connected to the power supply of the control unit; the control unit controls the temperature control jacket to heat or cool the cement paste as needed through heating wires and semiconductor cooling plates.

[0015] Furthermore, the inlet end of the valve is detachably connected to the outlet end of the guide tube at the bottom of the Martens funnel. This facilitates valve maintenance or replacement.

[0016] Furthermore, the lower half of the side wall of the Marshall funnel is provided with an inwardly recessed mounting cavity, and the temperature sensor is installed in the mounting cavity.

[0017] Furthermore, both the measuring cup and the Marshall funnel are provided with handles on their outer side walls; handle placement slots are provided at the positions corresponding to the handles on the supporting top plate, the mounting base, the temperature control sleeve, and the support top plate.

[0018] The handle is designed to make it easy for operators to grip when installing, disassembling, or moving parts, improving the convenience and safety of operation.

[0019] Furthermore, it also includes a cement slurry supply device, which includes a slurry silo, a conveying pipeline, a mud pump that conveys the cement slurry in the slurry silo to the conveying pipeline, and a supply pipeline connected to the conveying pipeline at one end via a rotatable joint. The outlet end of the supply pipeline is suspended above the Marshall funnel. A second liquid level sensor is installed inside the Marshall funnel. The second liquid level sensor is electrically connected to the control unit, and the control unit controls the start and stop of the mud pump.

[0020] The control unit starts the mud pump, and cement paste is supplied to the Marshall funnel. When the injection volume reaches the bottom of the filter screen, the level sensor sends a signal back to the control unit, which then shuts down the mud pump, thus achieving automatic supply and level control of cement paste and further reducing manual intervention.

[0021] Furthermore, the slurry silo is equipped with a stirring device.

[0022] Ensure that the cement paste maintains uniform properties during the supply process to avoid affecting measurement results due to sedimentation, segregation, or other phenomena.

[0023] Compared with existing technologies, the low water-cement ratio cement paste viscosity measuring device of this invention has the following advantages:

[0024] (1) The low water-cement ratio cement paste viscosity measuring device of this utility model has a high degree of automation. Through the coordinated work of each component and the control unit, the viscosity measurement of cement paste is automated, reducing manual operation links, reducing human error, and improving the accuracy and reliability of the measurement results. The design of the temperature control sleeve can effectively maintain the temperature stability of cement paste during the measurement process, avoid viscosity measurement errors caused by temperature changes, and ensure the accuracy of the test results. It is especially suitable for viscosity measurement of materials with high viscosity, long flow time, and easy to be affected by the external ambient temperature, such as low water-cement ratio cement paste.

[0025] (2) The low water-cement ratio cement paste viscosity measuring device of this utility model has a reasonable structural design. The connection between the Marshall funnel and the mounting base, the connection between the mounting base and the temperature control sleeve, and the connection between the valve and the Marshall funnel are all detachable, which facilitates installation, disassembly, maintenance and operation, and improves the practicality of the device. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the internal structure of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 2 of this utility model;

[0030] Figure 4 This is a side view of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 2 of this utility model.

[0031] Figure 5 This is a schematic diagram of the internal structure of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 3 of this utility model;

[0032] Figure 6 This is a side view of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 3 of this utility model;

[0033] Figure 7 This is a side view of the low water-cement ratio cement paste viscosity measuring device described in Embodiment 4 of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Support frame, 2-Mounting base, 3-Marsh funnel, 4-Temperature control sleeve, 5-Measuring cup, 6-Control unit, 7-Timer, 8-Support base plate, 9-Support top plate, 10-Support side plate, 11-Filter screen, 12-Temperature sensor, 13-Valve, 14-Insulation part, 15-Temperature control layer, 16-Insulation layer, 17-Level sensor, 18-Handle, 19-Handle placement slot, 20-Slurry bin, 21-Transfer pipe, 22-Slurry pump, 23-Connector, 24-Supply pipe, 25-Level sensor II. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figure 1 and 2 As shown, a low water-cement ratio cement paste viscosity measuring device includes a support frame 1, a mounting base 2 fixed on the support frame 1, a detachable Margarine funnel 3 mounted on the mounting base 2 and vertically suspended, a temperature control sleeve 4 connected to the mounting base 2 and fitted onto the outer wall of the Margarine funnel 3, a measuring cup 5 located below the Margarine funnel 3, a control unit 6 mounted on the support frame 1, and a timer 7.

[0041] The support frame 1 includes a support base plate 8, a support top plate 9, and a support side plate 10 connecting the support base plate 8 and the support top plate 9; the support top plate 9 has mounting holes.

[0042] Mounting base 2 is fixed in the mounting hole. Mounting base 2 has a funnel insertion hole in the shape of a frustum. The Marshall funnel 3 is inserted into the funnel insertion hole. The lower end face of mounting base 2 has a mounting groove, and the side wall of the mounting groove has an internal thread.

[0043] The upper end of the inner cavity of the Marshall funnel 3 is provided with a filter screen 11, the side wall is provided with a temperature sensor 12, and the bottom is provided with a valve 13; the inlet end of the valve 13 is detachably connected to the outlet end of the guide tube at the bottom of the Marshall funnel 3; the lower half of the side wall of the Marshall funnel 3 is provided with an inwardly recessed mounting cavity, and the temperature sensor 12 is installed in the mounting cavity.

[0044] The temperature control sleeve 4 is frustum-shaped, and its interior is a frustum-shaped funnel insertion cavity that matches the shape of the Martens funnel 3; the top of the temperature control sleeve 4 is provided with an insertion part 14 that can be installed in the mounting groove, and the insertion part 14 is provided with an external thread that is compatible with the internal thread; the temperature control sleeve 4 includes an inner temperature control layer 15 and an outer insulation layer 16; the temperature control layer 15 is provided with a heating wire and a semiconductor cooling chip.

[0045] Measuring cup 5 is placed on supporting base plate 8. Measuring cup 5 is equipped with liquid level sensor 17. A handle 18 is provided on the outer side wall of measuring cup 5.

[0046] Temperature sensor 12 is electrically connected to control unit 6. Temperature sensor 12 feeds back a signal to control unit 6, and control unit 6 controls the temperature of temperature control sleeve 4. Control unit 6 controls the opening and closing of valve 13. Liquid level sensor 17 is electrically connected to control unit 6. When the liquid level reaches the set position, liquid level sensor 17 feeds back a signal to control unit 6, and control unit 6 closes valve 13. Control unit 6 controls the start and stop of timer 7. When valve 13 is opened, timer 7 starts timing. When the liquid level reaches the preset position, timer 7 stops timing.

[0047] The working process of the low water-cement ratio cement paste viscosity measuring device described in this embodiment is as follows:

[0048] Pour cement slurry into the Marshall funnel 3 until the liquid level reaches the bottom of the filter screen 11; open valve 13 via the touch screen of control unit 6, and control unit 6 controls timer 7 to start timing; cement slurry flows into the measuring cup 5 below. During the flow, temperature sensor 12 monitors the temperature of cement slurry in real time and transmits the signal to control unit 6. Control unit 6 controls the heating wire or semiconductor cooling chip to work according to the temperature feedback to keep the temperature of cement slurry constant; when the cement slurry in measuring cup 5 reaches the scale line of 946ml, liquid level sensor 17 sends a signal to control unit 6, control unit 6 controls valve 13 to close and stops timer 7, thereby obtaining the viscosity value expressed in time (unit: seconds).

[0049] Example 2

[0050] like Figure 3 and 4 As shown, based on Embodiment 1, the difference from Embodiment 1 is that a handle 18 is also provided on the outer wall of the Marshall funnel 3; a handle placement groove 19 is provided at the position corresponding to the handle 18 of the supporting top plate 9, the mounting base 2, the temperature control sleeve 4.

[0051] Example 3

[0052] like Figure 5 and 6 As shown, based on Embodiment 1, the difference from Embodiment 1 is that it also includes a cement slurry supply device. The cement slurry supply device includes a slurry silo 20, a conveying pipe 21, a mud pump 22 that conveys the cement slurry in the slurry silo 20 to the conveying pipe 21, and a supply pipe 24 connected to the conveying pipe 21 at one end through a rotatable joint 23. A stirring device is provided in the slurry silo 20. The outlet end of the supply pipe 24 is suspended above the Marshall funnel 3. A second liquid level sensor 25 is provided in the Marshall funnel 3. The second liquid level sensor 25 is electrically connected to the control unit 6. The control unit 6 controls the start and stop of the mud pump 22.

[0053] Control unit 6 controls the start of mud pump 22, which supplies cement slurry in slurry bin 20 to delivery pipe 21. The cement slurry eventually flows into Marshall funnel 3 through supply pipe 24. When the liquid level of cement slurry in Marshall funnel 3 reaches the bottom of filter screen 11, level sensor 25 sends a feedback signal to control unit 6, and control unit 6 controls mud pump 22 to shut down and stop supplying cement slurry.

[0054] Example 4

[0055] like Figure 7 As shown, based on Embodiment 1, unlike Embodiment 3, the outer wall of the Marshall funnel 3 is also provided with a handle 18; the support top plate 9, the mounting base 2, the temperature control sleeve 4 and the handle 18 are provided with handle placement slots 19.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring the viscosity of cement paste with a low water-cement ratio, characterized in that: The device includes a support frame, a mounting base fixed to the support frame, a detachable Marshall funnel mounted on the mounting base and vertically suspended, a temperature control sleeve connected to the mounting base and fitted over the outer wall of the Marshall funnel, a measuring cup located below the Marshall funnel, a control unit and a timer mounted on the support frame; the upper end of the inner cavity of the Marshall funnel is provided with a filter screen, a temperature sensor is provided on the side wall, and a valve is provided at the bottom; the measuring cup is provided with a liquid level sensor; the temperature sensor is electrically connected to the control unit, and the control unit controls the temperature of the temperature control sleeve; the liquid level sensor is electrically connected to the control unit, and the control unit controls the opening and closing of the valve; the control unit controls the start and stop of the timer.

2. The low water cement ratio cement paste viscosity measurement device of claim 1, wherein: The support frame includes a support base plate, a support top plate, and a support side plate connecting the support base plate and the support top plate; The mounting base is installed on the top support plate; the measuring cup is placed on the bottom support plate.

3. The low water cement ratio cement paste viscosity measurement device of claim 2, wherein: The support top plate has an installation hole, the mounting base is fixed in the installation hole, and the mounting base has a funnel insertion hole in the shape of a frustum; the Marshall funnel is inserted into the funnel insertion hole.

4. The low water cement ratio cement paste viscosity measuring device of claim 3, wherein: The lower end face of the mounting base is provided with a mounting groove, and the side wall of the mounting groove is provided with an internal thread; the temperature control sleeve is frustum-shaped, and the inside is a frustum-shaped funnel insertion cavity that matches the shape of the Martens funnel; the top of the temperature control sleeve is provided with an insertion part that can be installed in the mounting groove, and the insertion part is provided with an external thread that is compatible with the internal thread.

5. The low water cement ratio cement paste viscosity measuring device of claim 4, wherein: The temperature control sleeve includes an inner temperature control layer and an outer insulation layer; the temperature control layer is provided with a heating wire and a semiconductor cooling chip.

6. The low water cement ratio cement paste viscosity measurement device of claim 1, wherein: The inlet end of the valve is detachably connected to the outlet end of the guide tube at the bottom of the Marshall funnel.

7. The low water cement ratio cement paste viscosity measurement device of claim 1, wherein: The lower half of the side wall of the Marshall funnel is provided with an inwardly recessed mounting cavity, and the temperature sensor is installed in the mounting cavity.

8. The low water cement ratio cement paste viscosity measurement device of claim 5, wherein: The measuring cup and the Marshall funnel are each provided with a handle on their outer side wall; the support top plate, the mounting base, the temperature control sleeve and the handle are provided with handle placement slots at the corresponding positions.

9. A low water cement ratio cement paste viscosity measuring device according to any one of claims 1 to 8, characterised in that: It also includes a cement paste supply device, which includes a paste silo, a conveying pipeline, a mud pump that conveys the cement paste in the paste silo to the conveying pipeline, and a supply pipeline connected to the conveying pipeline at one end via a rotatable joint. The outlet end of the supply pipeline is suspended above the Marshall funnel. A second liquid level sensor is installed inside the Marshall funnel. The second liquid level sensor is electrically connected to the control unit, and the control unit controls the start and stop of the mud pump.

10. The low water cement ratio cement paste viscosity measuring device of claim 9, wherein: The slurry silo is equipped with a stirring device.

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