Cement paste fluidity testing device
By designing a cement slurry flowability test device including a bracket, a flow cylinder, a weighing device, a solenoid valve and a transparent spiral pipeline, the existing device has solved the problem of low accuracy and large residual error when measuring fast flow slurry, and more accurate fluidity measurement and residual reduction effect is achieved.
Patent Information
- Application Number
- CN202420288312.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-07
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-02-07
AI Technical Summary
When facing a fast-flowing slurry slurry, it is difficult to accurately measure its fluidity, and measurement errors caused by slurry residue are prone to occur.
A test device including a bracket, a flow cylinder, a weighing device, a solenoid valve and a transparent spiral pipe are designed. By weighing the slurry mass in real time, increasing the slurry flow path and friction with spiral pipes, controlling the solenoid valve to control the slurry outflow, and displaying the test data through the display screen.
The device can more accurately measure fast-flowing slurry, its transparent spiral pipe design reduces slurry residue, improves the accuracy of test results, and distinguishes the impact of different factors on the fluidity of clean slurry through real-time data recording.
Smart Images
Figure CN222579892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cement paste fluidity testing, in particular to a cement paste fluidity testing device. Background Art
[0002] The fluidity of cement paste can usually be tested by paste fluidity cylinder or Marsh cylinder. However, when the paste fluidity is large, its flow rate is fast. It is difficult to accurately test the paste fluidity by the above equipment, and it is also difficult to distinguish the influence of different factors on the paste fluidity.
[0003] The problems with existing fluidity test devices are: 1. When the flow rate of the pure slurry is fast, it is difficult for existing equipment to accurately test its fluidity, resulting in the inability to distinguish the effects of different factors on the fluidity of the pure slurry; 2. The existing test device can only test the time when all the slurry flows out. When the performance of the two groups of slurries is not much different, the existing device is difficult to accurately distinguish; 3. When the existing test device is tested, some slurry will remain in the device, and different slurries may have different residual amounts in the device, which can easily lead to errors in the test. Therefore, it is necessary to develop a cement slurry fluidity test device to accurately measure fast-flowing slurries, improve the accuracy of test results, reduce slurry residual errors and achieve multifunctional testing. Utility Model Content
[0004] The utility model aims to provide a cement paste fluidity testing device, which is used to solve the problems of low measurement accuracy and large experimental error in the prior art due to the fast pure paste flow rate, similar paste properties and residual paste easily generated during device testing.
[0005] The utility model solves the above problems through the following technical solutions:
[0006] A cement paste fluidity testing device comprises: a bracket, a fluidity cylinder, a first weighing device, a second weighing device, a solenoid valve, a slurry receiving cylinder and a controller; wherein the first weighing device, the second weighing device and the controller are arranged on the bracket, the first weighing device is fixedly connected to the fluidity cylinder, and is used to weigh the mass of slurry flowing out of the fluidity cylinder in real time, a spiral pipe is connected below the fluidity cylinder, the solenoid valve is arranged at the outlet of the spiral pipe, and is used to control the outflow of slurry, and at the same time, the slurry receiving cylinder is arranged directly below the outlet of the spiral pipe, and is used to receive the outflowing slurry, and the second weighing device is fixed to the bottom of the bracket, and is used to weigh the mass of the slurry in the slurry receiving cylinder; the controller is electrically connected to the first weighing device, the second weighing device and the solenoid valve, and controls the switch of the solenoid valve according to the data received from the first weighing device and the second weighing device.
[0007] Workflow: During the test, pour the cement paste to be tested into the fluidity cylinder, then start the device, the controller will control the solenoid valve to open, the paste begins to flow out of the fluidity cylinder, and flows into the slurry receiving cylinder after passing through the spiral pipe; during this process, the first weighing device will weigh the mass of the slurry flowing out of the fluidity cylinder in real time and transmit the data to the controller; the second weighing device will weigh the mass of the slurry in the slurry receiving cylinder. The controller determines the flow performance of the slurry based on the received data and displays the relevant test data on the display. The controller determines whether to close the solenoid valve and stop recording data based on the difference in the mass of the slurry flowing out twice in a row.
[0008] Furthermore, a recording device is provided in the controller, and the recording device records the real-time weighing data of the first weighing device and the second weighing device at a preset frequency.
[0009] Furthermore, when the recording device detects that the mass change of the outflowing slurry is less than or equal to a preset value for two consecutive times, the controller controls the solenoid valve to close and stops recording.
[0010] Furthermore, the fluidity cylinder comprises: a cylinder cover and an inverted conical cylinder body, the cylinder cover and the inverted conical cylinder body are snap-connected, and the bottom of the inverted conical cylinder body is fixedly connected to the spiral pipe.
[0011] Furthermore, the spiral pipe is made of a transparent acrylic material, and the spiral pipe is threadedly connected to the inverted cone-shaped cylinder.
[0012] Furthermore, the spiral pipeline is also provided with a micro flow detection device electrically connected to the controller for realizing accurate detection and control of the slurry flow.
[0013] Furthermore, the controller is also provided with a display screen for displaying the mass and flow time of the outflowing slurry.
[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0015] (1) The utility model increases the path length of the slurry flow and prolongs the retention time of the slurry in the device by introducing a transparent spiral pipe. The friction between the slurry and the pipe wall is increased by the spiral shape. When the net slurry flow rate is fast, this design can effectively slow down the flow rate and more accurately measure its fluidity. Secondly, the device can also accurately measure the flow time of different slurries, even if the performance of these slurries is very similar. By increasing the flow path of the slurry in the pipe and the contact with the pipe wall, the effect of small performance differences on the flow time can be magnified, thereby improving the resolution of the test. At the same time, the spiral shape and inner wall structure of the transparent spiral pipe can promote the uniform distribution and smooth discharge of the slurry during the flow process, thereby reducing the adhesion and residue of the slurry on the inner wall of the pipe.
[0016] (2) The weighing device and the recording device controlling it in the present invention record the mass of the slurry flowing out in real time. We can obtain continuous data on the change of fluidity. These data can reflect the influence of flow rate on the fluidity of the slurry, thus helping us to distinguish the effect of different factors (such as additive type, particle distribution, etc.) on the fluidity of the net slurry. Secondly, this function provides continuous data on the change of slurry fluidity, not just the total outflow time. This means that even if the overall flow time of two groups of slurries is very close, there may be subtle differences in their fluidity change curves, which can be captured by real-time weighing data. At the same time, the slurry mass data at each moment can also be accurately obtained. Even if there is still a small amount of slurry remaining in the device after the test, this residual amount can be accurately calculated by comparing the weighing data before and after the test, and compensated in the final result. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Among them, 1-first weighing device; 2-fluidity cylinder; 3-bracket; 4-controller; 5-spiral pipeline; 6-solenoid valve; 7-slurry receiving cylinder; 8-second weighing device. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0020] In the following description, the terms "first\second\third" and the like are only used to distinguish similar objects and do not represent a specific order for the objects. It is understandable that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.
[0021] Embodiment 1:
[0022] Combined with Figure 1As shown, a cement paste fluidity testing device comprises: a bracket 3, a fluidity cylinder 2, a first weighing device 1, a second weighing device 8, a solenoid valve 6, a slurry receiving cylinder 7 and a controller 4; wherein, the first weighing device 1, the second weighing device 8 and the controller 4 are arranged on the bracket 3, the first weighing device 1 is fixedly connected to the fluidity cylinder 2, and is used to weigh the mass of the slurry flowing out of the fluidity cylinder 2 in real time, a spiral pipe 5 is connected below the fluidity cylinder 2, the solenoid valve 6 is arranged at the outlet of the spiral pipe 5, and is used to control the outflow of the slurry, and at the same time, the slurry receiving cylinder 7 is arranged directly below the outlet of the spiral pipe 5, and is used to receive the outflowing slurry, and the second weighing device 8 is fixed at the bottom of the bracket 3, and is used to weigh the mass of the slurry in the slurry receiving cylinder 7; the controller 4 is electrically connected to the first weighing device 1, the second weighing device 8 and the solenoid valve 6, and controls the switch of the solenoid valve 6 according to the data received from the first weighing device 1 and the second weighing device 8.
[0023] Workflow: During the test, pour the cement paste to be tested into the fluidity cylinder 2, and then start the device. The controller 4 will control the solenoid valve 6 to open, and the slurry will begin to flow out of the fluidity cylinder 2, and flow into the slurry receiving cylinder 7 after passing through the spiral pipe 5; during this process, the first weighing device 1 will weigh the mass of the slurry flowing out of the fluidity cylinder 2 in real time, and transmit the data to the controller 4; the second weighing device 8 will weigh the mass of the slurry in the slurry receiving cylinder 7. The controller 4 determines the flow performance of the slurry based on the received data and displays the relevant test data on the display screen. The controller 4 determines whether to close the solenoid valve 6 and stop recording data based on the difference in the mass of the slurry flowing out twice in a row.
[0024] It should be noted that the spiral pipe 5 is spiral in shape, which increases the path length of the slurry flow, prolongs the retention time of the slurry in the fluidity cylinder 2, and increases the friction between the slurry and the pipe wall. This design simulates the resistance that may be encountered when the slurry flows in actual work, thereby more realistically evaluating the fluidity of the slurry; by comparing the data of the first weighing device 1 and the second weighing device 8, the mass loss of the slurry during the flow process can be calculated, and then the fluidity of the slurry can be analyzed; the first weighing device 1 and the second weighing device 8 are both weighing sensors.
[0025] Embodiment 2:
[0026] Combined with Figure 1 As shown, on the basis of Example 1, a recording device is provided in the controller 4, and the recording device records the real-time weighing data of the first weighing device 1 and the second weighing device 8 at a preset frequency.
[0027] It should be noted that the recording device is a part of the controller 4, which is used to record the data obtained by the weighing device in real time at a preset frequency for subsequent analysis; "real-time weighing data" means that during the test, the first weighing device 1 continuously measures the mass of the slurry flowing out of the fluidity cylinder 2, and the second weighing device 8 continuously measures the mass of the slurry in the slurry receiving cylinder 7, and transmits these data to the controller 4 in real time; and "recording at a preset frequency" means that the recording device does not record data all the time, but records at a certain time interval or frequency. This not only reduces the number of data records and avoids the generation of too much redundant data, but also ensures that the data at key time points are recorded, thereby accurately reflecting the flow of the slurry. The recording device is like an airplane's black box, which continuously records flight data for analysis when needed; in this embodiment, it records the mass change data of cement slurry; it is assumed that the preset frequency of the recording device is to record data once per second. During the test, when the first weighing device 1 and the second weighing device 8 measure a new slurry mass, the recording device will record the data and mark the corresponding timestamp, so that a slurry mass data list arranged in chronological order can be obtained; by analyzing the data in the data list, the mass change of the slurry during the flow process can be understood, and then its fluidity can be evaluated, and by comparing the mass of the slurry in the slurry receiving tube 7 with the initial mass of the slurry, the mass of the slurry remaining in the fluidity tube 2 can be understood. At the same time, these data can also be saved as historical records for future reference and comparison.
[0028] When the recording device detects that the mass change of the outflowing slurry is less than or equal to the preset value for two consecutive times, the controller 4 controls the solenoid valve 6 to close and stops recording.
[0029] It should be noted that in this embodiment, the preset value is set to 1g, and the preset value can be set accordingly according to the actual measurement situation; when the recording device detects that the mass change of the outflowing slurry is less than 1g for two consecutive times, it means that the mass change of the slurry is very small in the two consecutive weighings, indicating that the slurry in the fluidity cylinder 2 has basically flowed out, and a small amount of slurry remains in the device; once the recording device detects this condition, it sends a signal to the controller 4; after receiving the signal, the controller 4 controls the solenoid valve 6 to close, preventing more slurry from flowing out of the fluidity cylinder 2, and stops recording data at the same time to avoid generating too much redundant data. For example: suppose that during the test, the recording device successively records the following slurry mass data: 100g, 100.5g, 100.9g, 101g, 101.1g, 101.2g; from the above, it can be seen that in the last two weighings (101.1g and 101.2g), the mass change of the slurry is only 0.1g, which is much less than 1g. Therefore, according to the preset conditions, the recording device will send a signal to the controller 4, which then controls the solenoid valve 6 to close and stop recording data. This design can automatically determine whether the slurry has all flowed out and stop the test at the appropriate time. This can not only save test time, but also avoid errors caused by human observation.
[0030] Embodiment 3:
[0031] Combined with Figure 1 As shown, on the basis of Example 1, the fluidity cylinder 2 comprises: a cylinder cover and an inverted conical cylinder body, the cylinder cover and the inverted conical cylinder body are snap-connected, and the bottom of the inverted conical cylinder body is fixedly connected to the spiral pipe 5.
[0032] It should be noted that the cylinder cover is located above the fluidity cylinder 2, which is used to seal and protect the cement slurry in the cylinder to prevent leakage or entry of foreign impurities during the test; when the cement slurry flows out of the fluidity cylinder 2, the weighing sensor transmits data to the controller 4 for processing; the inverted cone cylinder is an inverted cone structure. This design helps the cement slurry to spread more smoothly and evenly when flowing out, thereby improving the accuracy and repeatability of the test. The bottom of the inverted cone cylinder is fixedly connected to the spiral pipe 5 to prevent the slurry from leaking or clogging during the outflow process, so that the slurry can smoothly flow from the fluidity cylinder 2 into the spiral pipe 5, and finally flow out of the device for collection and weighing.
[0033] The spiral pipe 5 is made of a transparent acrylic material, and the spiral pipe 5 is threadedly connected to the inverted cone cylinder.
[0034] It should be noted that the spiral pipe 5 is an important component of the cement slurry fluidity test device, and its material selection has an important influence on the accuracy and reliability of the test. Transparent acrylic material is a high-quality material with the characteristics of high transparency, strong durability, and good chemical corrosion resistance. The spiral pipe 5 made of transparent acrylic material can not only observe the residual slurry in the pipe when cleaning the equipment, but also withstand the scouring and corrosion of the slurry, ensuring the stability and reliability of long-term use. Secondly, the connection between the spiral pipe 5 and the inverted cone cylinder adopts a threaded connection. This connection method has the advantages of simple structure, firm connection, easy disassembly and maintenance. Through the rotation and engagement of the thread, the spiral pipe 5 and the inverted cone cylinder can be tightly connected together to form a continuous and closed channel to ensure that the slurry will not leak or block during the flow process. At the same time, this connection method is also easy to disassemble and clean, which provides convenience for the maintenance and maintenance of the device.
[0035] Embodiment 4:
[0036] Based on Example 1, Figure 1 As shown, the spiral pipe 5 is also provided with a micro flow detection device electrically connected to the controller 4 for realizing accurate detection and control of the slurry flow.
[0037] It should be noted that in the cement paste fluidity test, the flow rate of the slurry directly affects the evaluation results of its flow performance. If the flow rate is too large or too small, it may lead to deviation and inaccuracy of the test data. Through the coordinated work of the micro-flow detection device and the controller 4, it can ensure that the slurry maintains a constant flow rate during the outflow process, so as to obtain more accurate and reliable test data; the working principle of the micro-flow detection device is to sense the flow state of the slurry in the pipeline and convert it into an electrical signal for processing. It has the characteristics of high precision and high sensitivity, and can capture slight changes in the slurry flow rate. When the flow rate changes, the detection device will immediately transmit the signal to the controller 4, and the controller 4 will adjust the solenoid valve 6 accordingly according to the received signal, so as to control the flow rate of the slurry. In this embodiment, the micro-flow detection device selects a differential pressure flowmeter, and the differential pressure flowmeter uses the pressure difference when the fluid passes through the device to calculate the flow rate. After receiving the signal of the differential pressure flowmeter, the controller 4 performs data processing and controls the switching degree of the solenoid valve 6 according to the set program, so as to achieve precise control of the slurry flow rate.
[0038] In this embodiment, the controller 4 controls the opening and closing degree of the solenoid valve 6 according to the preset flow value, so that the slurry flows out of the flow cylinder 2 at a constant flow rate. The micro-flow detection device monitors the flow rate in real time and transmits the data to the controller 4. If the actual flow rate deviates from the preset value, the controller 4 immediately adjusts the opening and closing degree of the solenoid valve 6 to control the flow rate to return to near the preset value.
[0039] Embodiment 5:
[0040] Combined with Figure 1 As shown, based on Example 1, the controller 4 is further provided with a display screen for displaying the mass of the outflowing slurry and the flow time.
[0041] It should be noted that, in this embodiment, in order to facilitate the test personnel to intuitively understand the test process and results, a display screen is also provided on the controller 4, so that the mass and flow time of the slurry flowing out of the fluidity cylinder 2 can be displayed in real time. By comparing the test results of starting the test after the slurry is loaded into the fluidity cylinder 2 and standing for a period of time before turning on the device for testing, the uniformity of the slurry can be reflected. If the test results are very different, it indicates that the slurry is uneven. For example, the slurry outflow time of the initial test is 15.8 seconds, and the slurry outflow time of the test again after standing for 5 minutes is 19.1 seconds. This indicates that the slurry may have undergone a certain degree of sedimentation or stratification during the standing process, resulting in a decrease in its uniformity. The design of the display screen makes the test process more transparent and convenient. The test personnel can directly obtain key test data without complicated operations or additional calculations. At the same time, the display screen can also reduce the possibility of human error and improve the accuracy and reliability of the test.
[0042] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.
Claims
1. A cement paste fluidity testing device, characterized in that: include: A bracket, a fluidity cylinder, a first weighing device, a second weighing device, a solenoid valve, a slurry receiving cylinder and a controller; wherein the first weighing device and the controller are arranged on the bracket, the first weighing device is fixedly connected to the fluidity cylinder, and is used to weigh the mass of the slurry flowing out of the fluidity cylinder in real time, a spiral pipe is connected to the bottom of the fluidity cylinder, the solenoid valve is arranged at the outlet of the spiral pipe, and is used to control the outflow of the slurry, and at the same time, the slurry receiving cylinder is arranged directly below the outlet of the spiral pipe, and is used to receive the outflowing slurry, and the second weighing device is fixed at the bottom of the slurry receiving cylinder, and is used to weigh the mass of the slurry in the slurry receiving cylinder; the controller is electrically connected to the first weighing device, the second weighing device and the solenoid valve, and controls the switch of the solenoid valve according to the data received from the first weighing device and the second weighing device.
2. A cement paste fluidity testing device according to claim 1, characterized in that: The controller is provided with a recording device, and the recording device records the real-time weighing data of the first weighing device and the second weighing device at a preset frequency.
3. A cement paste fluidity testing device according to claim 2, characterized in that: When the recording device detects that the mass change of the outflowing slurry is less than or equal to the preset value for two consecutive times, the controller controls the solenoid valve to close and stops recording.
4. A cement paste fluidity testing device according to claim 1, characterized in that: The flow cylinder comprises: a cylinder cover and an inverted cone cylinder body, the cylinder cover and the inverted cone cylinder body are snap-connected, and the lower side of the inverted cone cylinder body is fixedly connected to the spiral pipe.
5. A cement paste fluidity testing device according to claim 4, characterized in that: The spiral pipe is made of a transparent acrylic material, and the spiral pipe is threadedly connected to the inverted cone cylinder.
6. A cement paste fluidity testing device according to claim 1, characterized in that: The spiral pipeline is also provided with a micro flow detection device electrically connected to the controller for realizing accurate detection and control of the slurry flow.
7. A cement paste fluidity testing device according to claim 1, characterized in that: The controller is also provided with a display screen for displaying the mass and flow time of the outflowing slurry.