Device for measuring setting time and consistency of cement

Abstract

The utility model discloses a cement setting time and consistency measuring device, and relates to the technical field of cement paste detection, a rotating table is arranged on a base, a test mold is arranged at the top of the rotating table, a supporting rod is vertically arranged on one side of the rotating table, an automatic measuring instrument is arranged right above the test mold, and the automatic measuring instrument is connected to the supporting rod through a fixing rod; a sliding rod is arranged in the middle of the automatic tester, a test needle is connected to the bottom end of the sliding rod, the infrared camera is arranged on one side of the automatic tester, and a cleaning mechanism is further arranged on the base and comprises a flushing assembly and a wiping assembly. The device can be used for measuring the consistency and the setting time of the cement mortar, repeated operation is not needed, great convenience is brought to measurement, the influence caused by human factors is reduced through automatic measurement and data recording, the result is more accurate and reliable, and the measurement accuracy is high. Meanwhile, an infrared camera is arranged for assisting in judging whether the cement sample reaches an initial setting state or not, so that the measurement error is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cement slurry detection, and more specifically to a device for measuring cement setting time and consistency. Background Art

[0002] In the process of determining the setting time of cement by traditional methods, it is necessary to repeat the measurement many times before the setting time can be determined. During this period, the test mold needs to be taken out of the moisture curing box and placed on the instrument for measurement at regular intervals. This is inefficient, time-consuming and labor-intensive. In addition, moving the test mold multiple times will inevitably cause the test mold to vibrate, thereby affecting the accuracy of the measurement. In addition, the unevenness of the cement sample may lead to large measurement errors. Since the measurement time is very long and multiple measurements are required, this limits the speed of the measurement.

[0003] At present, there are instruments that can automatically release the slide bar for measurement, which can reduce a lot of tedious repetitive operations, but it cannot solve the problem of needing to perform repeated measurements, and may increase the possibility of vibration of the test mold, and cannot solve the problem of errors caused by defects in the cement sample. At the same time, in the process of measuring the consistency of mortar, a stopwatch is needed for timing, which requires two people to operate, causing delays in timing, and each time there will be a different timing delay, and it also takes time to tighten the screws after 10 seconds, which increases the difficulty and accuracy of timing, making the measurement results inaccurate. When reading, the deformation of the scale may also cause reading deviations, and the reading on the dial needs to be estimated, which cannot meet the high-precision consistency measurement. Moreover, the measurement efficiency is not high. Generally, it requires a person who operates the instrument and a timekeeper to cooperate in the operation, which is inconvenient to operate and limits the speed of measurement to a certain extent. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing detection instruments are inconvenient to use, and the detection accuracy is not high, and errors are prone to occur. In order to overcome the defects of the prior art, the utility model proposes a cement setting time and consistency measuring device, which can be used to measure the consistency and setting time of cement mortar, and does not require repeated operations, which brings great convenience to the measurement. The automatic measurement and recording of data reduces the influence of human factors, and the results are more accurate and reliable. At the same time, it is also equipped with an infrared camera to assist in judging whether the cement sample has reached the initial setting state, reducing the measurement error.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a device for measuring cement setting time and consistency, comprising a base, a rotating table, a test mold, a support rod, a fixed rod, an automatic measuring instrument, a slide rod, a test needle, an infrared camera and a cleaning mechanism, wherein the rotating table is arranged on the base, the test mold is arranged on the top of the rotating table, a support rod is vertically arranged on one side of the rotating table, and the bottom end of the support rod is connected to the base, an automatic measuring instrument is arranged directly above the test mold, the automatic measuring instrument is connected to the support rod through the fixed rod, a slide rod is arranged in the middle of the automatic measuring instrument, the bottom end of the slide rod is connected to the test needle, the infrared camera is arranged on one side of the automatic measuring instrument, and the test needle and the infrared camera are both electrically connected to the automatic measuring instrument, and a cleaning mechanism is also arranged on the base, the cleaning mechanism comprises a flushing component for flushing away residual cement on the test needle and a wiping component for removing residual water on the test needle.

[0007] In a preferred technical solution of the utility model, the flushing component includes a first motor, a beam, a cleaning chamber, a nozzle, a first hose, a second hose, a pump body and a water tank. The first motor is fixedly mounted on the base, the output end of the first motor is connected to the beam, a cleaning chamber is provided at one end of the beam, a nozzle is fixedly mounted on the inner side wall of the cleaning chamber, the water tank is fixedly mounted on the base, and the nozzle is connected to the pump body on the water tank through the first hose, and the cleaning chamber is connected to the water tank through the second hose.

[0008] In a preferred technical solution of the utility model, the wiping assembly includes a connecting rod, a wiping block, a ring, a slider, a permanent magnet and an iron sheet. One end of the connecting rod is hinged on the inner wall of the cleaning chamber, and the other end of the connecting rod is connected to the wiping block. The slider is slidably connected to the inner wall of the cleaning chamber, and one side of the slider is rotatably connected to the ring, and the ring is sleeved on the connecting rod. A permanent magnet is arranged on the top of the slider, and an iron sheet cooperating with the permanent magnet is arranged on the sliding rod.

[0009] In a preferred technical solution of the utility model, a glass plate is also provided on the top of the rotating table, and the test mold is placed on the glass plate.

[0010] In a preferred technical solution of the utility model, the test needle is one of an initial setting needle, a final setting needle or a test cone.

[0011] In a preferred technical solution of the utility model, the test mold is a truncated cone container or a conical container.

[0012] In a preferred technical solution of the present utility model, the test needle is at least 10 mm away from the inner wall of the test mold.

[0013] The beneficial effects of the utility model are:

[0014] 1. The determination of cement setting time requires more than a dozen measurements. The traditional method requires too many repetitions, which is a huge workload and tests the operator's patience. This device does not require repeated operations, which greatly facilitates the determination. It is easy to operate, and the automatic measurement and recording of data reduces the impact of human factors, making the results more accurate and reliable.

[0015] 2. For the current automatic measurement methods, moving the test mold more than a dozen times will inevitably cause the test mold to vibrate, which will compact the cement paste and change its state, thus affecting the accuracy of the measurement. However, this device only needs to move the test piece twice during the entire test process, which makes the test piece closer to the original state and the result is more reliable. In addition, the initial setting of cement is easily affected by the defects of the sample. Equipped with an infrared camera, it can determine whether the initial setting state has been truly reached and obtain accurate data.

[0016] 3. This device can also accurately measure the consistency of building mortar. The measurement of consistency avoids the use of dials and scales in traditional consistency meters, which will have errors after thermal expansion and contraction, and there may be other human factors that cause the long scale to deform, resulting in deviations in the readings.

[0017] 4. The length of cement setting time will affect the construction window of mortar. When designing the mix ratio of concrete or mortar, it is necessary to consider the matching of cement setting time and mortar consistency to ensure good construction performance and final project quality. Therefore, the determination of cement setting time and mortar consistency often needs to be measured together. The traditional determination method requires a cement setting time meter and a mortar consistency meter, which has many operation procedures. This device can complete two measurements at the same time, reducing the time and labor cost of switching between different instruments, improving work efficiency, simplifying the operation process, reducing the complexity of operation, and saving valuable space in the laboratory or construction site compared to using a single instrument. At the same time, the use of advanced sensors can achieve more accurate measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a device for measuring cement setting time and consistency provided by a specific embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle cleaning chamber;

[0020] Figure 3 It is a schematic diagram of the structure of the test cone (located on the top) and the conical container (located on the bottom).

[0021] In the figure:

[0022] 1. Base; 2. Rotating table; 3. Test mold; 4. Support rod; 5. Fixed rod; 6. Automatic measuring instrument; 7. Sliding rod; 8. Test needle; 9. Infrared camera; 10. Flushing assembly; 101. First motor; 102. Crossbeam; 103. Cleaning chamber; 104. Nozzle; 105. First hose; 106. Second hose; 107. Pump body; 108. Water tank; 11. Wiping assembly; 111. Connecting rod; 112. Wiping block; 113. Ring; 114. Sliding block; 115. Permanent magnet; 116. Iron sheet; 12. Glass plate. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0024] like Figure 1-3As shown, an embodiment provides a device for measuring cement setting time and consistency, including a base 1, a rotating table 2, a test mold 3, a support rod 4, a fixed rod 5, an automatic measuring instrument 6, a slide rod 7, a test needle 8, an infrared camera 9 and a cleaning mechanism. The base 1 is provided with a rotating table 2, the top of the rotating table 2 is provided with a test mold 3, a support rod 4 is vertically provided on one side of the rotating table 2, and the bottom end of the support rod 4 is connected to the base 1, an automatic measuring instrument 6 is provided directly above the test mold 3, the automatic measuring instrument 6 is connected to the support rod 4 through the fixed rod 5, a slide rod 7 is provided in the middle of the automatic measuring instrument 6, the bottom end of the slide rod 7 is connected to the test needle 8, the infrared camera 9 is provided on one side of the automatic measuring instrument 6, and the test needle 8 and the infrared camera 9 are both electrically connected to the automatic measuring instrument 6, and a cleaning mechanism is also provided on the base 1, the cleaning mechanism includes a flushing component 10 for flushing away residual cement on the test needle 8 and a wiping component 11 for removing residual moisture on the test needle 8. In this embodiment, the rotating table 2 is fixedly mounted on the base 1, and the top surface of the rotating table 2 is a plane, which is convenient for placing the test mold 3, and the rotating table 2 is set to allow the test mold 3 to rotate an angle after each measurement. The rotation process is very slow to avoid vibrating the cement paste during the rotation process. The test mold 3 contains a cement sample, and the test mold 3 can be removed from the rotating table 2, which is convenient for operation. The fixed rod 5 is horizontally arranged above the test mold 3, and the fixed rod 5 is arranged vertically with the support rod 4. The automatic measuring instrument 6 can realize automatic data recording and data transmission and timed release and lifting of the slide rod 7. There are instruments on the market that can realize this function. The set test needle 8 can detect the viscosity, consistency and other data of the cement slurry in the test mold 3, and then the automatic measuring instrument 6 determines whether the cement slurry has reached the initial setting or final setting state. The infrared camera 9 is used to shoot the infrared spectrum of cement, and can record the spectrum of the cement sample during the entire coagulation process and transmit data. Then, the reading and spectrum data of the automatic measuring instrument 6 are analyzed to assist in judging whether the cement sample has truly reached the initial coagulation state and obtain accurate data. Since the test needle 8 is easily adhered to a small amount of cement slurry on the surface every time it is pulled out of the cement slurry in the test mold 3, which causes the cement to solidify on the surface of the test needle 8, affecting the accuracy of the test needle detection, the cement adhering to the surface of the test needle 8 can be removed by setting a cleaning mechanism to ensure the accuracy of the device test, wherein the flushing component 10 can pre-wash away the cement slurry on the surface of the test needle 8 to prevent it from adhering to the wiping component 11 and affecting the subsequent wiping effect.

[0025] Specifically, the flushing assembly 10 includes a first motor 101, a crossbeam 102, a cleaning chamber 103, a nozzle 104, a first hose 105, a second hose 106, a pump body 107 and a water tank 108. The first motor 101 is fixedly mounted on the base 1. The output end of the first motor 101 is connected to the crossbeam 102. The cleaning chamber 103 is arranged at one end of the crossbeam 102. The nozzle 104 is fixedly mounted on the inner wall of the cleaning chamber 103. The water tank 108 is fixedly mounted on the base 1. The nozzle 104 is connected to the pump body 107 on the water tank 108 through the first hose 105. The cleaning chamber 103 is connected to the water tank 108 through the second hose 106. In this embodiment, the crossbeam 102 is horizontally arranged between the test mold 3 and the automatic measuring instrument 6, and the crossbeam 102 is arranged vertically with the power output shaft of the first motor 101. The first motor 101 can drive the crossbeam 102 to rotate in a horizontal plane, thereby achieving the effect of adjusting the position of the cleaning chamber 103. The top of the cleaning chamber 103 is provided with an opening, so that the test needle 8 can extend from the top opening into the cleaning chamber 103 for cleaning, and can prevent the mud removed from the test needle 8 from accidentally falling onto the sample, which helps to ensure the detection accuracy. The nozzle 104 is arranged obliquely downward, and the pump body 107 can pump the water in the water tank 108 to the nozzle 104 through the first hose 105 to spray out, so as to remove the cement slurry on the surface of the test needle 8. One end of the second hose 106 is connected to the bottom of the cleaning chamber 103, and the other end of the second hose 106 is connected to the top of the water tank 108, so that the waste water used for cleaning can flow back to the water tank 108 again, which is convenient for reuse and achieves the purpose of saving water. The pump body 107 is arranged at the bottom of one side of the water tank 108, and a filter screen is also arranged in the water tank 108 to filter out cement particles, and the filter screen is located above the pump body 107.

[0026] Specifically, the wiping assembly 11 includes a connecting rod 111, a wiping block 112, a collar 113, a slider 114, a permanent magnet 115 and an iron sheet 116. One end of the connecting rod 111 is hinged on the inner wall of the cleaning chamber 103, and the other end of the connecting rod 111 is connected to the wiping block 112. The slider 114 is slidably connected to the inner wall of the cleaning chamber 103. One side of the slider 114 is rotatably connected to the collar 113, and the collar 113 is sleeved on the connecting rod 111. The top of the slider 114 is provided with a permanent magnet 115, and the slide bar 7 is provided with an iron sheet 116 that cooperates with the permanent magnet 115. In this embodiment, two connecting rods 111 are provided, and the two connecting rods 111 are arranged symmetrically in the cleaning chamber 103. The wiping block 112 is located above the nozzle 104. The wiping block 112 is used to wipe the test needle 8. In the initial state, the connecting rod 111 is in a vertical state under the action of gravity, so that the wiping block 112 will not contact the test needle 8. The slider 114 is an L-shaped structure, which can slide up and down in the cleaning chamber 103, and then drive the connecting rod 111 to swing through the collar 113. The permanent magnet 115 can be adsorbed and cooperated with the iron sheet 116, so that when the slide bar 7 moves up, it can drive the slider 114 to move synchronously, so that the two wiping blocks 112 can clamp the test needle 8 to achieve the wiping function.

[0027] Specifically, a glass plate 12 is also provided on the top of the rotating table 2, and the test mold 3 is placed on the glass plate 12. In this embodiment, the glass plate 12 plays a role in assisting the calibration and zeroing. When the bottom end of the test needle contacts the glass plate 12, the reading of the automatic measuring instrument 6 is set to zero.

[0028] Specifically, the test needle 8 is one of an initial setting needle, a final setting needle or a test cone. In this embodiment, the initial setting needle is used to detect the initial setting state of the cement paste in the test mold 3, the final setting needle is used to detect the final setting state of the cement paste in the test mold 3, and the test cone is used to detect the consistency value of the cement paste in the test mold 3.

[0029] Specifically, the test mold 3 is a truncated cone container or a conical container. In this embodiment, a truncated cone container is used to test the cement setting time, and is used in conjunction with the initial setting needle and the final setting needle. A conical container is used to test the consistency of the mortar, and is used in conjunction with the test cone.

[0030] Specifically, the test needle 8 is at least 10 mm away from the inner wall of the test mold 3 .

[0031] Working principle: When measuring the setting time of cement, the test needle 8 is an initial setting needle or a final setting needle, and the test mold 3 is a truncated cone container. The mixed cement slurry is loaded into the test mold 3 which has been placed on the glass plate 12. The time (t) from the time when all the cement is added to the water to the time when the entire instrument is placed in the curing box is recorded. After smoothing, it is quickly placed in the curing box. After 30 minutes, the test mold 3 and the glass plate 12 are moved to the rotating table 2, and the position of the test mold 3 is adjusted so that the initial setting needle is at least 10 mm away from the inner wall of the test mold 3. Then turn on the automatic measuring instrument 6 and release the slide bar 7 at the same time. When the bottom end of the initial setting needle contacts the glass plate 12, set the reading of the automatic measuring instrument 6 to zero. Debug the release time of the slide bar 7 of the automatic measuring instrument 6 to every 30 minutes, debug the rotating table 2 to rotate 10° every 30 minutes, turn on the infrared camera 9, and then put the entire instrument into the curing box for automatic measurement. Record the reading 30s after the release of the slide bar 7, transmit the data at the same time, and observe the image (or spectral image) of the infrared camera 9 for comparison to determine whether the cement sample in the test mold 3 has reached the initial setting state. When the initial setting time is approaching, open the curing box, adjust the working interval of the rotating table 2 and the automatic measuring instrument 6 from every 30 minutes to every 5 minutes, and then observe the data. When the reading of 3-5mm appears several times continuously (or is consistent with the infrared image data at the initial setting time), it means that the test needle 8 has sunk to 4±1mm away from the glass plate, that is, the cement has reached the initial setting state. The time of the first reading of 3-5mm plus t is the initial setting time of the cement. If there is only one reading of 3-5mm, and the subsequent readings are still zero, it can be determined based on the infrared image whether it is caused by defects in the cement sample, thereby eliminating errors caused by erroneous data. After the initial setting, take out the instrument, turn over the test mold 3, replace the initial setting needle with the final setting needle, and change the working interval of the rotating table 2 and the automatic measuring instrument 6 to continue measuring every 15 minutes, and put it back into the curing box. After 8 hours, take out the test piece and observe the traces left by the final setting needle. When the annular attachment of the final setting needle does not leave any traces on the test piece, the cement reaches the final setting state. Observe the serial number of the first pinhole that does not leave a circular trace, and the final setting time can be calculated. The time when there is no circular trace for the first time plus the initial setting time is the final setting time of the cement. If there is no annular trace in the 20th measurement, and there is no annular trace in the subsequent measurements, it means that the cement has reached the final setting state at the 20th measurement. Then the final setting time can be calculated as initial setting time + 20×15 (min).

[0032] When measuring the consistency of mortar, the test needle 8 is a test cone, and the test mold 3 is a conical container. The evenly mixed mortar is loaded into the conical container at once, and the top surface of the mortar is 1 cm away from the upper mouth of the tube, and then the tamping rod is used to tamp and gently vibrate until the surface is flat. Then the conical container is placed on the rotating table 2, and the conical container is located below the test cone fixed at the bottom of the slide bar 7. The height of the automatic measuring instrument 6 is adjusted, and when the test cone just touches the mortar in the container, it is zeroed and the automatic measuring instrument 6 is turned on, and then the slide bar 7 is released to make the test cone fall, and then the timing is started. The reading is recorded after 10 seconds. The reading of the falling height of the slide bar 7 is the consistency value of the mortar. Repeat the operation three times and take the average value.

[0033] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for measuring cement setting time and consistency, characterized in that: The invention comprises a base (1), a rotating table (2), a test mold (3), a support rod (4), a fixing rod (5), an automatic measuring instrument (6), a sliding rod (7), a test needle (8), an infrared camera (9) and a cleaning mechanism. The base (1) is provided with a rotating table (2), the top of the rotating table (2) is provided with a test mold (3), a support rod (4) is vertically provided on one side of the rotating table (2), and the bottom end of the support rod (4) is connected to the base (1), and an automatic measuring instrument (6) is provided directly above the test mold (3). The automatic measuring instrument (6) is provided by A fixing rod (5) is connected to a supporting rod (4); a sliding rod (7) is arranged in the middle of the automatic measuring instrument (6); a test needle (8) is connected to the bottom end of the sliding rod (7); an infrared camera (9) is arranged on one side of the automatic measuring instrument (6); and both the test needle (8) and the infrared camera (9) are electrically connected to the automatic measuring instrument (6); a cleaning mechanism is also arranged on the base (1); the cleaning mechanism comprises a flushing component (10) for flushing away residual cement on the test needle (8) and a wiping component (11) for removing residual water on the test needle (8).

2. A device for measuring cement setting time and consistency according to claim 1, characterized in that: The flushing assembly (10) comprises a first motor (101), a crossbeam (102), a cleaning chamber (103), a nozzle (104), a first hose (105), a second hose (106), a pump body (107) and a water storage tank (108); the first motor (101) is fixedly mounted on the base (1); the output end of the first motor (101) is connected to the crossbeam (102); one end of the crossbeam (102) is provided with a cleaning chamber (103); the nozzle (104) is fixedly mounted on the inner side wall of the cleaning chamber (103); the water storage tank (108) is fixedly mounted on the base (1); the nozzle (104) is connected to the pump body (107) on the water storage tank (108) via the first hose (105); and the cleaning chamber (103) is connected to the water storage tank (108) via the second hose (106).

3. A device for measuring cement setting time and consistency according to claim 2, characterized in that: The wiping assembly (11) comprises a connecting rod (111), a wiping block (112), a collar (113), a slider (114), a permanent magnet (115) and an iron sheet (116); one end of the connecting rod (111) is hinged to the inner wall of the cleaning chamber (103); the other end of the connecting rod (111) is connected to the wiping block (112); the slider (114) is slidably connected to the inner wall of the cleaning chamber (103); one side of the slider (114) is rotatably connected to the collar (113), and the collar (113) is sleeved on the connecting rod (111); a permanent magnet (115) is arranged on the top of the slider (114); and an iron sheet (116) cooperating with the permanent magnet (115) is arranged on the slide bar (7).

4. A device for measuring cement setting time and consistency according to claim 1, characterized in that: A glass plate (12) is also provided on the top of the rotating platform (2), and the test mold (3) is placed on the glass plate (12).

5. A device for measuring cement setting time and consistency according to claim 1, characterized in that: The test needle (8) is one of an initial setting needle, a final setting needle or a test cone.

6. A device for measuring cement setting time and consistency according to claim 1, characterized in that: The test mold (3) is a truncated cone container or a conical container.

7. A device for measuring cement setting time and consistency according to claim 1, characterized in that: The test needle (8) is at least 10 mm away from the inner wall of the test mold (3).

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