Full-automatic determinator for cement setting time and determination method of full-automatic determinator

Abstract

The invention discloses a full-automatic cement setting time determinator and a determination method thereof, and belongs to the technical field of cement setting time determination. The determinator comprises a constant temperature and humidity chamber and an electric cabinet, an initial setting time determination device and a final setting time determination device are respectively arranged in the constant temperature and humidity chamber, the electric cabinet is arranged on the constant temperature and humidity chamber, a controller is arranged in the electric cabinet, a touch screen is arranged on an opening in the side wall of the electric cabinet, and the touch screen is connected with the controller. And the controller is electrically connected with the constant temperature and humidity chamber and the touch screen. All the two test molds filled with cement paste can be simultaneously put into the constant-temperature and constant-humidity chamber for curing, so that the whole cement setting time measuring period is remarkably shortened, the measuring efficiency is improved, and full-automatic cement setting time measuring is really realized; the test mold and the to-be-tested piece on the inner side of the test mold do not need to be overturned in the testing process, so that the whole testing process is safely and smoothly carried out; the whole cement setting time determination process is simple, the determination period is short, and the determination efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to a cement setting time automatic tester and a determination method thereof, and belongs to the technical field of cement setting time determination. BACKGROUND

[0002] The cement setting time is used to represent the time change characteristics of cement after mixing with water, and is a key index for evaluating the performance of cement. The accuracy of the determination result directly affects the quality of construction engineering. The determination standard of cement setting time is JC / T 727-2005 cement paste standard consistency and setting time tester, and the initial setting time and final setting time are determined by manual operation of the Vicat apparatus. The standard determination method needs to go through independent processes of test piece forming, standard curing, initial setting time determination, test piece turning and final setting time determination. The existing cement setting time tester is limited to single process determination of initial setting time or final setting time, and manual operation is required frequently during the process, which has large manual intervention error and poor process continuity.

[0003] Therefore, the Chinese patent document with publication number CN120254233A discloses a full-automatic cement setting time tester, which realizes full-process automation of test piece wet temperature curing, initial setting time determination, automatic 180° turning of test piece and final setting time determination through the cooperative operation of the environment box, test piece positioning system and determination system. The tester adopts a turntable type multi-station design combined with a reverse shaft to avoid traditional manual test mold turning, the accurate positioning of the azimuth module eliminates the manual operation error of sequential testing, the test needle is positioned by a laser displacement meter and an electromagnet sensor to improve the measurement resolution, and the intelligent integrated cement setting time tester effectively solves the process dispersion problem caused by manual intervention and significantly improves the measurement result accuracy.

[0004] However, the tester has the following deficiencies when used to determine the cement setting time: First, when the first test mold completes the initial setting time determination and is turned by 180 degrees, the second test mold has completed the initial setting time determination; when the first test mold completes the final setting time determination, the second test mold is turned by 180 degrees, and the third test mold completes the initial setting time determination. However, since the initial setting time and the final setting time of the cement are both calculated from the time when water is added to the cement as the starting time, it is necessary to place each test mold into the environment box for curing at the same time interval, which leads to a significant extension of the entire cement setting time determination period, and further leads to a significant decrease in determination efficiency. In addition, personnel need to stay near the tester for a long time to place all the test molds into the environment box, which leads to the fact that the tester does not truly achieve full-automatic determination of the cement setting time.

[0005] Second, in the process of turning the test mold 180 degrees, the test piece may move relative to the test mold or even fall out of the test mold, resulting in failure of the cement setting time measurement, and the test piece that falls out may injure other parts or even cause the entire tester to be stuck.

[0006] Third, the entire cement setting time measurement process is complex, the measurement period is long, the measurement efficiency is low, and the initial setting time measurement and the final setting time measurement are linked and controlled, resulting in a high failure rate of the tester. SUMMARY

[0007] To solve the above technical problems, the present application provides a cement setting time full-automatic tester and a measurement method thereof.

[0008] The present application is realized by the following technical solutions: A cement setting time full-automatic tester comprises a constant temperature and humidity box and an electric control box, the constant temperature and humidity box is internally provided with an initial setting time measurement device and a final setting time measurement device, the electric control box is arranged on the constant temperature and humidity box, a controller is arranged in the electric control box, a touch screen is arranged on the side wall of the electric control box, and the controller is electrically connected with the constant temperature and humidity box and the touch screen.

[0009] The initial setting time measurement device comprises a test mold rotating mechanism, a needle wiping assembly and an initial setting time measurement mechanism arranged in sequence from bottom to top.

[0010] The test mold rotating mechanism comprises a hollow base, a rotating platform and a servo motor, the hollow base is fixedly arranged in the constant temperature and humidity box, a circular groove is concavely arranged at the top of the hollow base, the rotating platform is provided with a test mold positioning groove at the upper end, the middle part is rotationally connected with the circular groove, the lower end penetrates through the bottom plate of the circular groove and extends into the hollow base, the servo motor is arranged in the hollow base, the output shaft of the servo motor is connected with the lower end of the rotating platform, and the servo motor is electrically connected with the controller.

[0011] The needle wiping assembly comprises a pneumatic finger A and a solenoid valve A, sponge wiping blocks are arranged on the two clamping jaws A of the pneumatic finger A on the side close to each other, the solenoid valve A is connected with the pneumatic finger A through an air pipe, and the solenoid valve A is electrically connected with the controller.

[0012] The initial setting time measurement mechanism comprises a lifting driving assembly, a distance detection assembly, a clamping assembly, a limiting assembly and a measurement assembly, the clamping assembly and the limiting assembly are arranged on the lifting driving assembly, the limiting assembly is located below the clamping assembly, the measurement assembly penetrates through the clamping assembly and the limiting assembly and is slidably connected with the limiting assembly, and the distance detection assembly is arranged at the upper end of the measurement assembly.

[0013] The lifting driving assembly is a servo linear module, the servo linear module is electrically connected with the controller, and the clamping assembly and the limiting assembly are arranged on the sliding table of the servo linear module.

[0014] The distance detection assembly is a laser ranging sensor, and the laser ranging sensor is electrically connected with the controller.

[0015] The clamping assembly comprises a pneumatic finger B and a solenoid valve B, the solenoid valve B is connected with the pneumatic finger B through an air pipe, and is electrically connected with the controller.

[0016] The limiting assembly comprises a horizontal plate and a linear bearing, a through hole A is formed in the horizontal plate, and the linear bearing is arranged on the inner side of the through hole A.

[0017] The measuring assembly comprises a sliding rod and a test needle coaxially arranged at the lower end of the sliding rod.

[0018] The final setting time measuring device comprises an annular accessory, a test mold rotating mechanism, a needle wiping assembly and a final setting time measuring mechanism arranged in sequence from bottom to top, the shape and structure of the final setting time measuring mechanism are consistent with those of the initial setting time measuring mechanism, and the annular accessory is sleeved on the test needle in the final setting time measuring mechanism.

[0019] The final setting time measuring device further comprises a camera and an image processing module, the camera is arranged on the inner side wall of the constant temperature and humidity box and located on the upper side of the test mold rotating mechanism, and the image processing module is arranged in the electric control box and electrically connected with the camera and the controller.

[0020] A USB interface is arranged on the electric control box and electrically connected with the controller. A test information input interface, a test information display interface and a cement setting time test result interface are arranged on the touch screen, wherein: A sample number, a tester, a water adding time, an initial setting test start time, an initial setting test interval time, a final setting test start time, a final setting test interval time, a temperature setting and a humidity setting dialog box are arranged in the test information input interface; An initial setting time, a final setting time, an in-box temperature and an in-box humidity display box are arranged in the test information display interface, and a start test virtual button and a data transmission virtual button are arranged in the test information display interface; An initial setting time and a final setting time display box are arranged in the cement setting time test result interface.

[0021] The test mold comprises a glass plate and a cylindrical test mold body, the lower end of the cylindrical test mold body is fixedly connected with the glass plate, the shape and size of the glass plate are matched with those of the test mold positioning groove, and the thickness of the glass plate is consistent with the depth of the test mold positioning groove.

[0022] A cement setting time measuring method comprises the following steps: Step 100, according to the relevant standard, the cement paste is mixed, and the cement water adding time is recorded, then the mixed cement paste is added into two test molds, and the upper surface of the cement paste is flush with the upper end surface of the test mold, then the two test molds are positioned and placed on the test mold rotating mechanism in the initial setting time measuring device and the test mold rotating mechanism in the final setting time measuring device; Step 200, close the glass door of the constant temperature and humidity box, input the water adding time, initial setting test start time, initial setting test interval time, final setting test start time, final setting test interval time on the touch screen, set the cement curing temperature and cement curing humidity, and then click the start test virtual button on the touch screen; Step 300, when the time reaches the initial setting test start time, the initial setting time measuring device operates and automatically measures the initial setting time of the test piece placed on the test mold rotating mechanism and located in the test mold; Step 400, when the time reaches the final setting test start time, the final setting time measuring device operates and automatically measures the final setting time of the test piece placed on the test mold rotating mechanism and located in the test mold; Step 500, the controller calculates the difference between the initial setting time and the water adding time as the measured initial setting time, calculates the difference between the final setting time and the water adding time as the measured final setting time, and transmits the measured initial setting time and final setting time to the touch screen for display.

[0023] The initial setting test start time in step 200 is set to 30 min after the water adding time; The initial setting test interval time is set to have three, in time sequence in turn 20 min / 10 mm, 10 min / 7 mm, 2 min / 6 mm; wherein 20 min / 10 mm means when the distance from the test needle to the glass plate after sinking is ≥10 mm, the test frequency is every 20 min; 10 min / 7 mm means when the distance from the test needle to the glass plate after sinking is between 7 mm and 10 mm, the test frequency is every 10 min; 2 min / 6 mm means when the distance from the test needle to the glass plate after sinking is between 6 mm and 7 mm, the test frequency is every 2 min; The final setting test start time is 30 min after the initial setting time; The final setting test interval time is set to have two, in time sequence in turn 20 min / 1 mm, 5 min / 0.7 mm; wherein 20 min / 1 mm means when the depth of the test needle sinking into the test piece is ≥1 mm, the test frequency is every 20 min; 5 min / 0.7 mm means when the depth of the test needle sinking into the test piece is between 0.7 mm and 1 mm, the test frequency is every 5 min.

[0024] The method for measuring the initial setting time of the cement sample by the initial setting time measuring device after the time reaches the initial setting test starting time in the step 300 comprises the following steps: Step 301, the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move downward together, and simultaneously detects the distance from the upper end surface of the measuring assembly to the cement sample by the distance detecting assembly. When the distance from the upper end surface of the measuring assembly to the cement sample is consistent with the length of the measuring assembly, it indicates that the test needle starts to contact the cement sample. At this time, the lifting driving assembly is closed, and the clamping assembly, the limiting assembly and the measuring assembly no longer continue to move downward; Step 302, the clamping assembly releases the measuring assembly, and the measuring assembly freely falls. After S, the distance from the upper end surface of the measuring assembly to the cement sample is detected by the distance detecting assembly Then the controller calculates the distance from the test needle to the glass plate according to the following formula : , Wherein, is the height of the cylindrical test mold body, and L is the length of the measuring assembly; Step 303, first, the clamping assembly clamps the measuring assembly. Then the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move upward together to the position where the test needle and the wiping needle assembly are opposite. Next, the wiping needle assembly acts to clamp the test needle, and the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move up and down reciprocally to wipe the surface of the test needle by the wiping needle assembly. Then the lifting driving assembly is closed, and the wiping needle assembly returns to the initial state. Step 304, the controller judges whether the cement reaches the initial setting state. If 3mm≤ ≤5mm in step 302, it indicates that the cement is suspected to reach the initial setting state. Then step 305 and steps 301 to 304 are executed once in sequence. If the test results of two times both indicate that the cement reaches the initial setting state, the 30S after the clamping assembly releases the measuring assembly in the first test process is taken as the initial setting time, and the measurement of the initial setting time is ended. When the test result of the second time indicates that the cement does not reach the initial setting state, i.e. >5mm, the next initial setting time measurement time is determined according to the value of and the initial setting test interval time, and step 305 and step 306 are executed in sequence. If >5mm in step 302, the next initial setting time measurement time is determined according to the value of and the initial setting test interval time, and step 305 and step 306 are executed in sequence. Step 305, the test mold rotating mechanism drives the test mold to rotate clockwise by an angle, which is 10~30 equal angle of 360 degrees. Step 306, when the time reaches the next initial setting time determined in step 304, repeat steps 301 to 306 until the initial setting time measurement is completed.

[0025] The method for measuring the final setting time of the test piece by the final setting time measuring device when the time reaches the final setting test start time in step 400 comprises the following steps: Step 401, the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move downward together, and at the same time, the distance between the upper end face of the measuring assembly and the test piece is detected by the distance detection assembly. When the distance between the upper end face of the measuring assembly and the test piece is consistent with the length of the measuring assembly, it indicates that the test needle begins to contact the test piece. At this time, the lifting driving assembly is closed, and the clamping assembly, the limiting assembly and the measuring assembly no longer continue to move downward; Step 402, the clamping assembly releases the measuring assembly, and the measuring assembly freely falls, and then the distance between the upper end face of the measuring assembly and the test piece is detected by the distance detection assembly Then the controller calculates the depth of the test needle sinking into the test piece according to the following formula : , Wherein, L is the length of the measuring assembly; Step 403, first, the clamping assembly clamps the measuring assembly, and then the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move upward together to the position where the test needle is opposite to the test needle and the test needle assembly, and at this time, the annular accessory is located on the upper side of the test needle assembly. Next, the test needle assembly moves to clamp the test needle, and the lifting driving assembly drives the clamping assembly, the limiting assembly and the measuring assembly to move up and down reciprocally to clean the surface of the test needle through the test needle assembly. Then, the lifting driving assembly is closed, and the test needle assembly returns to the initial state; Step 404, the controller judges whether the cement reaches the final setting state. If the distance between the upper end face of the measuring assembly and the test piece in step 402 is ≤0.5mm, it indicates that the cement is suspected to reach the final setting state, and steps 405, 401 to 404 are executed in sequence twice immediately. If the test results of three times all indicate that the cement reaches the final setting state, the 30s after the clamping assembly releases the measuring assembly in the first test process is taken as the final setting time, and the final setting time measurement is ended. If the distance between the upper end face of the measuring assembly and the test piece in step 402 is >0.5mm, according to the value of and the final setting test interval time, the next final setting time measurement time is determined, and steps 405 and 406 are executed in sequence. Step 405, the test mold rotating mechanism drives the test mold to rotate clockwise by an angle, which is 10~30 equal angle of 360 degrees. Step 406: When the time reaches the next final setting time determined in step 404, repeat steps 401 to 406 until the final setting time measurement is completed.

[0026] The beneficial effects of this invention are as follows: 1. After placing the two molds containing cement paste onto the mold rotation mechanism inside the constant temperature and humidity chamber, the instrument can be started to automatically complete the determination of the initial setting time and final setting time of cement. All two molds containing cement paste can be placed into the constant temperature and humidity chamber for curing at the same time, which significantly shortens the entire cement setting time determination cycle and improves the determination efficiency, truly achieving fully automatic determination of cement setting time.

[0027] 2. For the determination of initial setting time and final setting time, two test specimens were prepared separately and independently. Initial setting time measuring devices and final setting time measuring devices were set up independently in constant temperature and humidity chambers. The initial setting time measuring device was used to determine the initial setting time of one test specimen, and the final setting time measuring device was used to determine the final setting time of the other test specimen. During the measurement process, it was not necessary to flip the mold and the test specimen inside it, which ensured that the entire measurement process was safe and smooth.

[0028] 3. The entire cement setting time measurement process is simple, the measurement cycle is short, and the measurement efficiency is high. Furthermore, the initial setting time measurement device and the final setting time measurement device complete the cement setting time measurement separately and independently, and the instrument failure rate is low.

[0029] 4. The frequency of testing and the time for the next initial setting time determination are determined based on the distance from the test needle to the glass plate after it sinks. This can both avoid missing the initial setting time of cement and ensure the accuracy of the initial setting time test results.

[0030] 5. The frequency of testing and the time for the next final setting time determination are determined based on the depth to which the test needle penetrates the test specimen. This can both avoid missing the final setting time of cement and ensure the accuracy of the final setting time test results. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the measuring instrument of the present invention; Figure 2 for Figure 1 Sectional view along AA; Figure 3 for Figure 1 A magnified view of the area at point C; Figure 4 This is a top view of the assembled trial mold and trial mold rotation mechanism of the present invention; Figure 5 for Figure 4 A cross-sectional view along BB; Figure 6 is a top view of the rotary platform of the present application; Figure 7 is a structural schematic view of the needle wiping assembly of the present application; Figure 8 is an interface diagram of the touch screen of the present application; Figure 9 is a schematic view of the present application calculating the distance of the test needle to the glass plate; Figure 10 is a schematic view of the present application calculating the depth of the test needle sinking into the test piece.

[0032] In the figure: 1-constant temperature and humidity box, 2-initial setting time measuring mechanism, 21-lifting driving assembly, 211-sliding table, 22-distance detecting assembly, 23-clamping assembly, 24-limiting assembly, 241-cross plate, 242-linear bearing, 25-measuring assembly, 251-sliding rod, 252-test needle, 3-final setting time measuring mechanism, 4-electric control box, 5-touch screen, 6-USB interface, 7-glass door, 8-camera, 9-test model rotating mechanism, 91-hollow base, 92-rotary platform, 921-test model positioning groove, 93-servo motor, 10-annular accessory, 11-test model, 111-glass plate, 112-cylindrical test model body, 12-needle wiping assembly, 121-clamping jaw A, 122-sponge wiping block, 13-controller, 14-image processing module. DETAILED DESCRIPTION

[0033] The technical solutions of the present application are further described below, but the scope of protection is not limited to the description.

[0034] As shown in Figures 1 to 10 , the cement setting time automatic measuring instrument provided by the present application comprises a constant temperature and humidity box 1 and an electric control box 4, the constant temperature and humidity box 1 is respectively provided with initial setting time measuring device and final setting time measuring device, the electric control box 4 is arranged on the constant temperature and humidity box 1, the electric control box 4 is provided with a controller 13, the side wall of the electric control box 4 is provided with a touch screen 5, and the controller 13 is electrically connected with the constant temperature and humidity box 1 and the touch screen 5.

[0035] ​​Specifically, according to the relevant standard, the cement net slurry is mixed, and the cement water adding time is recorded. Next, the mixed cement net slurry is added to the two test molds 11, and the upper surface of the cement net slurry is flush with the upper end surface of the test mold 11. Next, the two test molds 11 containing the cement net slurry are positioned and placed on the test mold rotating mechanism 9 in the initial setting time measuring device and the test mold rotating mechanism 9 in the final setting time measuring device. Then, the cement test piece is cured by the constant temperature and humidity box 1, the initial setting time of the test piece in one of the test molds 11 is measured by the initial setting time measuring device, the final setting time of the test piece in the other test mold 11 is measured by the final setting time measuring device, and finally the difference between the initial setting time and the water adding time is calculated as the measured initial setting time by the controller, the difference between the final setting time and the water adding time is calculated as the measured final setting time, and the measured initial setting time and final setting time are transmitted to the touch screen for display.

[0036] After the two test molds 11 containing the cement net slurry are placed on the test mold rotating mechanism 9 in the constant temperature and humidity box 1, the tester can automatically complete the initial setting time measurement and final setting time measurement. Compared with the prior art of CN120254233A, the present application has the following technical effects: First, all the two test molds 11 containing the cement net slurry can be placed in the constant temperature and humidity box 1 for curing at the same time, which significantly shortens the entire cement setting time measurement period and improves the measurement efficiency, and truly realizes automatic cement setting time measurement. Second, for initial setting time measurement and final setting time measurement, two test pieces are prepared respectively and independently, and initial setting time measuring device and final setting time measuring device are set in the constant temperature and humidity box 1 independently. The initial setting time of one test piece is measured by the initial setting time measuring device, and the final setting time of the other test piece is measured by the final setting time measuring device. During the measurement process, the test mold 11 and the test piece inside it do not need to be turned over, which ensures the safety and smoothness of the entire measurement process.

[0037] Third, the entire cement setting time measurement process is simple, the measurement period is short, the measurement efficiency is high, the initial setting time measuring device and the final setting time measuring device respectively and independently complete the cement setting time measurement, and the tester has low failure rate.

[0038] The initial setting time measuring device comprises, from bottom to top, a test mold rotating mechanism 9, a needle wiping assembly 12 and an initial setting time measuring mechanism 2.

[0039] The test mold rotating mechanism 9 comprises a hollow base 91, a rotating platform 92 and a servo motor 93, the hollow base 91 is fixedly arranged in the constant temperature and humidity box 1, the top of the hollow base 91 is concave downward to form a circular groove, the upper end of the rotating platform 92 is provided with a test mold positioning groove 921, the middle part is rotationally connected with the circular groove, and the lower end penetrates through the bottom plate of the circular groove and extends into the hollow base 91, the servo motor 93 is arranged in the hollow base 91, the output shaft of the servo motor 93 is connected with the lower end of the rotating platform 92, and the servo motor 93 is electrically connected with the controller 13.

[0040] The needle wiping assembly 12 comprises a pneumatic finger A and a solenoid valve A, sponge wiping blocks 122 are arranged on two clamping jaws A 121 of the pneumatic finger A on the side close to each other, the solenoid valve A is connected with the pneumatic finger A through an air pipe, and the solenoid valve A is electrically connected with the controller 13.

[0041] The initial setting time measuring mechanism 2 comprises a lifting driving assembly 21, a distance detecting assembly 22, a clamping assembly 23, a limiting assembly 24 and a measuring assembly 25, the clamping assembly 23 and the limiting assembly 24 are arranged on the lifting driving assembly 21, the limiting assembly 24 is located below the clamping assembly 23, the measuring assembly 25 penetrates through the clamping assembly 23 and the limiting assembly 24 and is slidably connected with the limiting assembly 24, and the distance detecting assembly 22 is arranged at the upper end of the measuring assembly 25.

[0042] The lifting driving assembly 21 is a servo linear module, the servo linear module is electrically connected with the controller 13, and the clamping assembly 23 and the limiting assembly 24 are arranged on the sliding table 211 of the servo linear module.

[0043] The distance detecting assembly 22 is a laser ranging sensor, and the laser ranging sensor is electrically connected with the controller 13.

[0044] The clamping assembly 23 comprises a pneumatic finger B and a solenoid valve B, the solenoid valve B is connected with the pneumatic finger B through an air pipe and is electrically connected with the controller 13.

[0045] The limiting assembly 24 comprises a horizontal plate 241 and a linear bearing 242, a through hole A is formed in the horizontal plate 241, and the linear bearing 242 is arranged on the inner side of the through hole A. The linear bearing 242 is slidably connected with the sliding rod 251 to limit the radial direction of the sliding rod 251.

[0046] The measuring assembly 25 comprises a sliding rod 251 and a test needle 252 coaxially arranged at the lower end of the sliding rod 251.

[0047] The final setting time measuring device comprises a ring-shaped accessory 10, a test mold rotating mechanism 9, a needle wiping assembly 12 and a final setting time measuring mechanism 3 arranged in sequence from bottom to top, the final setting time measuring mechanism 3 has the same shape and structure as the initial setting time measuring mechanism 2, and the ring-shaped accessory 10 is sleeved on the test needle 252 in the final setting time measuring mechanism 3.

[0048] The final setting time measuring device further comprises a camera 8 and an image processing module 14, the camera 8 is arranged on the inner side wall of the constant temperature and humidity box 1 and located on the upper side of the test mold rotating mechanism 9, and the image processing module 14 is arranged in the electric control box 4 and electrically connected with the camera 8 and the controller 13.

[0049] Specifically, during the process of measuring the final setting time, the camera 8 takes an image of the test needle 252 after sinking into the test piece for 30 seconds, and transmits the image to the image processing module 14 to verify whether the test piece reaches the final setting state, that is, when the depth of the test needle 252 sinking into the test piece is 0.5mm, the ring-shaped accessory 10 cannot leave marks on the test piece.

[0050] The electric control box 4 is provided with a USB interface 6, and the USB interface 6 is electrically connected with the controller 13; The touch screen 5 is provided with a test information input interface, a test information display interface and a cement setting time test result interface, wherein: The test information input interface is provided with a sample number, a tester, a water adding time, an initial setting test start time, an initial setting test interval time, a final setting test start time, a final setting test interval time, a temperature setting and a humidity setting dialog box; The test information display interface is provided with an initial setting time, a final setting time, a box temperature and a box humidity display box, and a start test virtual button and a data transmission virtual button; The cement setting time test result interface is provided with an initial setting time and a final setting time display box.

[0051] Further comprising a test mold 11, the test mold 11 comprises a glass plate 111 and a cylindrical test mold body 112, the lower end of the cylindrical test mold body 112 is fixedly connected with the glass plate 111, the shape and size of the glass plate 111 are matched with the shape and size of the test mold positioning groove 921, and the thickness of the glass plate 111 is consistent with the depth of the test mold positioning groove 921.

[0052] A method for measuring the cement setting time, comprising the following steps: Step 100, according to the relevant standards, the cement paste is mixed, and the cement water adding time is recorded. Next, the mixed cement paste is added into two test molds 11, and the upper surface of the cement paste is made flush with the upper end surface of the test mold 11. Then, the two test molds 11 are positioned and placed on the test mold rotating mechanism 9 in the initial setting time measuring device and the test mold rotating mechanism 9 in the final setting time measuring device.

[0053] Specifically, the cement paste is mixed according to the requirements of the “Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Method” (GB / T 1346-2011). The two test molds 11 containing the cement paste are simultaneously placed in the constant temperature and humidity box 1 for curing, which significantly shortens the entire cement setting time measurement period and improves the measurement efficiency, truly achieving full-automatic measurement of the cement setting time.

[0054] Step 200, close the glass door 7 of the constant temperature and humidity box 1, enter the water adding time, initial setting test start time, initial setting test interval time, final setting test start time, final setting test interval time on the touch screen 5, set the cement curing temperature and cement curing humidity, and then click the start test virtual button on the touch screen 5.

[0055] Specifically, the cement curing temperature is set to 20±1℃, and the cement curing humidity is not less than 90%, so as to provide the required temperature and humidity environment for the test piece through the constant temperature and humidity box 1.

[0056] Step 300, when the time reaches the initial setting test start time, the initial setting time measuring device operates and automatically measures the initial setting time of the test piece placed on the test mold rotating mechanism 9 and located in the test mold 11.

[0057] Step 400, when the time reaches the final setting test start time, the final setting time measuring device operates and automatically measures the final setting time of the test piece placed on the test mold rotating mechanism 9 and located in the test mold 11.

[0058] Specifically, as shown in steps 300 and 400, the initial setting time of one test piece is measured by the initial setting time measuring device, and the final setting time of the other test piece is measured by the final setting time measuring device. During the measurement process, the test mold 11 and the test piece inside it do not need to be flipped, ensuring that the entire measurement process is safe and smooth. The initial setting time measuring device and the final setting time measuring device independently complete the measurement of the cement setting time, and the measurement instrument has a low failure rate.

[0059] Step 500, the controller 13 calculates the difference between the initial setting time and the water adding time as the measured initial setting time, calculates the difference between the final setting time and the water adding time as the measured final setting time, and transmits the measured initial setting time and final setting time to the touch screen 5 for display.

[0060] Specifically, the whole cement setting time determination process is simple, the determination period is short, and the determination efficiency is high.

[0061] The initial setting test start time in the step 200 is set to 30 min after the water adding time; The initial setting test interval time is set to three, in time sequence, 20 min / 10 mm, 10 min / 7 mm and 2 min / 6 mm; wherein, 20 min / 10 mm means that when the distance from the test needle 252 to the glass plate 111 is ≥10 mm, the test frequency is once every 20 min; 10 min / 7 mm means that when the distance from the test needle 252 to the glass plate 111 is between 7 mm and 10 mm, the test frequency is once every 10 min; 2 min / 6 mm means that when the distance from the test needle 252 to the glass plate 111 is between 6 mm and 7 mm, the test frequency is once every 2 min.

[0062] Specifically, according to the distance from the test needle 252 to the glass plate 111, the test frequency and the next initial setting time determination time are determined, which can avoid missing the initial setting time of the cement and ensure the test result precision of the initial setting time.

[0063] The final setting test start time is 30 min after the initial setting time; The final setting test interval time is set to two, in time sequence, 20 min / 1 mm and 5 min / 0.7 mm; wherein, 20 min / 1 mm means that when the depth of the test needle 252 sinking into the test piece is ≥1 mm, the test frequency is once every 20 min; 5 min / 0.7 mm means that when the depth of the test needle 252 sinking into the test piece is between 0.7 mm and 1 mm, the test frequency is once every 5 min.

[0064] Specifically, according to the depth of the test needle 252 sinking into the test piece, the test frequency and the next final setting time determination time are determined, which can avoid missing the final setting time of the cement and ensure the test result precision of the final setting time.

[0065] The method for the initial setting time determination device to determine the initial setting time of the test piece when the time reaches the initial setting test start time in the step 300 comprises the following steps: Step 301: The lifting drive assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move down together, and at the same time, the distance detection assembly 22 detects the distance from the upper surface of the measuring assembly 25 to the test piece. When the distance from the upper surface of the measuring assembly 25 to the test piece is consistent with the length of the measuring assembly 25, it indicates that the test needle 252 has started to contact the test piece. At this time, the lifting drive assembly 21 is closed, and the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 no longer move down.

[0066] Specifically, the distance from the upper surface of the measuring component 25 to the test piece is detected in real time by a laser rangefinder. At the same time, the slide 211 and the clamping component 23 and the limiting component 24 installed on the slide 211 are driven to move down together by a servo linear module, so as to achieve precise control of the distance from the upper surface of the measuring component 25 to the test piece.

[0067] Step 302: The clamping component 23 releases the measuring component 25, allowing the measuring component 25 to fall freely. After 30 seconds, the distance from the upper surface of the measuring component 25 to the test piece is detected by the distance detection component 22. Then, the distance from the test needle 252 to the glass plate 111 is calculated by the controller 13 using the following formula. : , in, L is the height of the cylindrical test mold 112, and L is the length of the measuring component 25.

[0068] Specifically, the principle of the clamping component 23 releasing the measuring component 25 is as follows: In the initial state, the two grippers B of the pneumatic finger B are engaged to clamp the slide bar 251. When it is necessary to release the slide bar 251, the solenoid valve B controls the pneumatic finger B to move, driving the two grippers B to move away from each other, thereby releasing the measuring component 25.

[0069] Height of cylindrical mold body 112 The length L of the measuring component 25 is a known quantity, which can be used before determining the cement setting time. The measured values ​​of L are input into controller 13. The calculation principle is as follows Figure 9 As shown.

[0070] Step 303, first, the measuring assembly 25 is clamped by the clamping assembly 23, then the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move upward together to the position where the test needle 252 is opposite to the needle wiping assembly 12, next, the needle wiping assembly 12 acts to clamp the test needle 252, and the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move up and down reciprocatingly to wipe the surface of the test needle 252 by the needle wiping assembly 12, then the lifting driving assembly 21 is closed, and the needle wiping assembly 12 returns to the initial state.

[0071] Specifically, the principle that the clamping assembly 23 clamps the measuring assembly 25 is that the electromagnetic valve B controls the pneumatic finger B to act and drive the two clamping jaws B to move to the direction of approaching each other, so as to clamp the measuring assembly 25.

[0072] The installation position of the needle wiping assembly 12 is fixed, so the height from the test needle 252 to the test piece in the test mold 11 is a known amount, therefore, when the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move upward together, the distance from the upper end surface of the measuring assembly 25 to the test piece is detected in real time by the laser distance sensor, so that the test needle 252 can be lifted to the position opposite to the needle wiping assembly 12.

[0073] The principle that the needle wiping assembly 12 acts to clamp the test needle 252 is that in the initial state, the distance between the two sponge wiping blocks 122 installed on the two clamping jaws A121 is greater than the diameter of the slide rod 251, so that the slide rod 251 can move up and down relative to the needle wiping assembly 12, when the needle wiping assembly 12 needs to clamp the test needle 252, the electromagnetic valve A controls the pneumatic finger A to act and drive the two clamping jaws A121 to move to the direction of approaching each other until the two sponge wiping blocks 122 clamp the test needle 252.

[0074] When the needle wiping assembly 12 has clamped the test needle 252, the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move up and down reciprocatingly, so that the test needle 252 moves up and down reciprocatingly relative to the two sponge wiping blocks 122, thereby wiping the surface of the test needle 252.

[0075] After the surface of the test needle 252 is wiped, the electromagnetic valve A controls the pneumatic finger A to act and drive the two clamping jaws A121 to move to the direction of moving away from each other, so that the needle wiping assembly 12 returns to the initial state.

[0076] Step 304, the controller 13 judges whether the cement reaches the initial setting state, if 3mm≤ ≤5mm, it indicates that the cement is suspected to reach the initial setting state, and steps 305 and 301-304 are executed once in sequence immediately, if the test results of two times both indicate that the cement reaches the initial setting state, the initial setting time is determined as 30S after the clamping assembly 23 releases the measuring assembly 25 in the first test process, and the initial setting time measurement is ended; and when the second test result indicates that the cement does not reach the initial setting state, i.e. >5mm, the next initial setting time measurement time is determined according to the value of and the initial setting test interval time, and steps 305 and 306 are executed in sequence. If the value of >5mm in step 302, the next initial setting time measurement time is determined according to the value of and the initial setting test interval time, and steps 305 and 306 are executed in sequence.

[0077] Step 305: the test mold rotating mechanism 9 drives the test mold 11 to rotate clockwise by an angle, which is 360 degrees 10-30 equal angle.

[0078] Specifically, the rotation platform 92 is driven to rotate by the servo motor 93, so as to accurately control the rotation angle of the rotation platform 92. The test mold rotating mechanism 9 drives the test mold 11 to rotate clockwise by an angle, which is 360 degrees 10-30 equal angle (for example, each time the test mold 11 rotates clockwise by 18 degrees), so as to ensure that the test needle 252 does not fall into the same needle hole each time the initial setting time is measured. Of course, the test mold rotating mechanism 9 can also drive the test mold 11 to rotate counterclockwise by an angle each time.

[0079] Step 306: when the time reaches the next initial setting time measurement time determined in step 304, steps 301-306 are repeated until the initial setting time measurement is completed.

[0080] The method for measuring the final setting time of the test piece by the final setting time measuring device when the time reaches the final setting test start time in the step 400 includes the following steps: Step 401: the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move downward together, and simultaneously detects the distance from the upper end surface of the measuring assembly 25 to the test piece by the distance detecting assembly 22. When the distance from the upper end surface of the measuring assembly 25 to the test piece is consistent with the length of the measuring assembly 25, it indicates that the test needle 252 starts to contact the test piece. At this time, the lifting driving assembly 21 is closed, and the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 do not continue to move downward.

[0081] Step 402: the clamping assembly 23 releases the measuring assembly 25, and the measuring assembly 25 freely falls, and the distance from the upper end surface of the measuring assembly 25 to the test piece is detected by the distance detecting assembly 22 after 30S Then the controller 13 calculates the depth of the test needle 252 sinking into the piece to be tested according to the following formula : , Wherein, L is the length of the measuring assembly 25.

[0082] Step 403, first, the measuring assembly 25 is clamped by the clamping assembly 23, then the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move upward together to the position where the test needle 252 is opposite to the wiping needle assembly 12, and at this time the annular attachment 10 is located on the upper side of the wiping needle assembly 12, next the wiping needle assembly 12 acts to clamp the test needle 252, and the lifting driving assembly 21 drives the clamping assembly 23, the limiting assembly 24 and the measuring assembly 25 to move up and down reciprocatingly to wipe the surface of the test needle 252 by the wiping needle assembly 12, then the lifting driving assembly 21 is closed, and the wiping needle assembly 12 returns to the initial state.

[0083] Step 404, the controller 13 judges whether the cement reaches the final setting state, if the ≤0.5mm in step 402, it indicates that the cement is suspected to reach the final setting state, immediately the steps 405, 401 to 404 are executed in sequence twice, if the three test results all indicate that the cement reaches the final setting state, the 30S after the clamping assembly 23 releases the measuring assembly 25 in the first test process is taken as the final setting time, and the final setting time determination is ended; And if the >0.5mm in step 402, according to the value of and the final setting test interval time, the next final setting time determination time is determined, and the steps 405 and 406 are executed in sequence.

[0084] If the three test results are not all indicating that the cement reaches the final setting state, the value of when the cement does not reach the final setting state is taken to determine the next final setting time determination time, and the steps 405 and 406 are executed in sequence.

[0085] Step 405, the test mold rotating mechanism 9 drives the test mold 11 to rotate clockwise by an angle, which is 360 degrees 10~30 equal angle. Step 406, when the time reaches the next final setting time determination time determined in step 404, the steps 401 to 406 are repeated until the final setting time determination is completed.

[0086] Specifically, during the cement setting time determination process, the controller 13 records and stores the process data of the test; after the cement setting time determination is completed, the USB flash disk is inserted into the USB interface 6, and then the data transmission virtual button on the touch screen 5 is clicked to jump to the data storage interface, and the user can select all data or part of the data according to the need and export to the USB flash disk, and the exported data can be further analyzed by the computer.

Claims

1. A fully automatic cement setting time tester, characterized in that: It includes a constant temperature and humidity chamber (1) and an electrical control box (4). The constant temperature and humidity chamber (1) is equipped with a device for measuring the initial condensation time and a device for measuring the final condensation time. The electrical control box (4) is located on the constant temperature and humidity chamber (1). The electrical control box (4) is equipped with a controller (13). The side wall of the electrical control box (4) has an opening for a touch screen (5). The controller (13) is electrically connected to the constant temperature and humidity chamber (1) and the touch screen (5).

2. The fully automatic cement setting time tester as described in claim 1, characterized in that: The initial setting time measuring device includes a mold rotation mechanism (9), a wiping needle assembly (12), and an initial setting time measuring mechanism (2) arranged from bottom to top.

3. The fully automatic cement setting time tester as described in claim 2, characterized in that: The test mold rotation mechanism (9) includes a hollow base (91), a rotary platform (92), and a servo motor (93). The hollow base (91) is fixedly installed in the constant temperature and humidity chamber (1), and the top of the hollow base (91) is recessed with a circular groove. The upper end of the rotary platform (92) is provided with a test mold positioning groove (921), the middle part is rotatably connected to the circular groove, and the lower end passes through the bottom plate of the circular groove and extends into the hollow base (91). The servo motor (93) is installed in the hollow base (91), the output shaft of the servo motor (93) is connected to the lower end of the rotary platform (92), and the servo motor (93) is electrically connected to the controller (13).

4. The fully automatic cement setting time tester as described in claim 2, characterized in that: The wiping needle assembly (12) includes a pneumatic finger A and a solenoid valve A. The two grippers A (121) of the pneumatic finger A are provided with sponge wiping blocks (122) on the side that are close to each other. The solenoid valve A is connected to the pneumatic finger A through an air pipe and is electrically connected to the controller (13).

5. The fully automatic cement setting time tester as described in claim 2, characterized in that: The initial setting time measuring mechanism (2) includes a lifting drive assembly (21), a distance detection assembly (22), a clamping assembly (23), a limiting assembly (24), and a measuring assembly (25). The clamping assembly (23) and the limiting assembly (24) are both located on the lifting drive assembly (21), and the limiting assembly (24) is located below the clamping assembly (23). The measuring assembly (25) passes through the clamping assembly (23) and the limiting assembly (24) and is slidably connected to the limiting assembly (24). The distance detection assembly (22) is located at the upper end of the measuring assembly (25).

6. The fully automatic cement setting time tester as described in claim 5, characterized in that: The lifting drive assembly (21) is a servo linear module. The servo linear module is electrically connected to the controller (13). The clamping assembly (23) and the limiting assembly (24) are both located on the slide table (211) of the servo linear module.

7. The fully automatic cement setting time tester as described in claim 5, characterized in that: The distance detection component (22) is a laser rangefinder, and the laser rangefinder is electrically connected to the controller (13).

8. The fully automatic cement setting time tester as described in claim 5, characterized in that: The clamping assembly (23) includes a pneumatic finger B and a solenoid valve B. The solenoid valve B is connected to the pneumatic finger B via an air tube and is electrically connected to the controller (13).

9. The fully automatic cement setting time tester as described in claim 5, characterized in that: The limiting component (24) includes a horizontal plate (241) and a linear bearing (242). The horizontal plate (241) has a through hole A, and the linear bearing (242) is located inside the through hole A.

10. The fully automatic cement setting time tester as described in claim 5, characterized in that: The measuring component (25) includes a slide bar (251) and a test needle (252) coaxially disposed at the lower end of the slide bar (251).

11. The fully automatic cement setting time tester as described in claim 10, characterized in that: The final setting time measuring device includes an annular attachment (10), and a mold rotation mechanism (9), a wiping needle assembly (12), and a final setting time measuring mechanism (3) arranged from bottom to top. The shape and structure of the final setting time measuring mechanism (3) are consistent with the shape and structure of the initial setting time measuring mechanism (2). The annular attachment (10) is fitted onto the test needle (252) in the final setting time measuring mechanism (3).

12. The fully automatic cement setting time tester as described in claim 11, characterized in that: The final setting time measuring device also includes a camera (8) and an image processing module (14). The camera (8) is located on the inner wall of the constant temperature and humidity chamber (1) and above the mold rotation mechanism (9). The image processing module (14) is located in the electrical control box (4) and is electrically connected to the camera (8) and the controller (13).

13. The fully automatic cement setting time tester as described in claim 1, characterized in that: The electrical control box (4) is equipped with a USB interface (6), and the USB interface (6) is electrically connected to the controller (13); The touch screen (5) is equipped with a test information input interface, a test information display interface, and a cement setting time test result interface, wherein: The test information entry interface includes dialog boxes for sample number, testing personnel, water addition time, initial setting test start time, initial setting test interval, final setting test start time, final setting test interval, temperature setting, and humidity setting. The test information display interface includes display boxes for initial setting time, final setting time, chamber temperature, and chamber humidity, as well as virtual buttons for starting the test and data transmission. The interface for cement setting time test results includes display boxes for initial setting time and final setting time.

14. The fully automatic cement setting time tester as described in claim 3, characterized in that: It also includes a test mold (11), which includes a glass plate (111) and a cylindrical test mold body (112). The lower end of the cylindrical test mold body (112) is fixedly connected to the glass plate (111). The shape and size of the glass plate (111) are adapted to the shape and size of the test mold positioning groove (921), and the thickness of the glass plate (111) is consistent with the depth of the test mold positioning groove (921).

15. A method for determining the setting time of cement using a fully automatic measuring instrument as described in any one of claims 1 to 14, characterized in that: Includes the following steps: Step 100: According to relevant standards, mix cement paste and record the time of adding water to cement. Then, add the mixed cement paste to two molds (11) and make the upper surface of the cement paste coplanar with the upper end surface of the mold (11). Then, position the two molds (11) on the mold rotation mechanism (9) in the initial setting time measuring device and the mold rotation mechanism (9) in the final setting time measuring device. Step 200: Close the glass door (7) of the constant temperature and humidity chamber (1), enter the water addition time, initial setting test start time, initial setting test interval time, final setting test start time, and final setting test interval time on the touch screen (5), and set the cement curing temperature and cement curing humidity, and then click the start test virtual button on the touch screen (5). Step 300: When the time reaches the start time of the initial setting test, the initial setting time measuring device runs and automatically measures the initial setting time of the test piece placed on its mold rotation mechanism (9) and located in the mold (11). Step 400: When the time reaches the start time of the final setting test, the final setting time measuring device runs and automatically measures the final setting time of the test piece placed on its mold rotation mechanism (9) and located in the mold (11). Step 500: The controller (13) calculates the difference between the initial setting time and the water addition time as the measured initial setting time, calculates the difference between the final setting time and the water addition time as the measured final setting time, and transmits the measured initial setting time and final setting time to the touch screen (5) for display.

16. The method for determining cement setting time as described in claim 15, characterized in that: In step 200, the initial setting test start time is set to 30 minutes after the water is added. The initial solidification test interval is set to three times, in chronological order: 20min / 10mm, 10min / 7mm, and 2min / 6mm. Specifically, 20min / 10mm means that when the distance from the test needle (252) to the glass plate (111) after sinking is ≥10mm, the test frequency is once every 20 minutes; 10min / 7mm means that when the distance from the test needle (252) to the glass plate (111) after sinking is between 7mm and 10mm, the test frequency is once every 10 minutes; and 2min / 6mm means that when the distance from the test needle (252) to the glass plate (111) after sinking is between 6mm and 7mm, the test frequency is once every 2 minutes. The final setting test begins 30 minutes after the initial setting time. The final solidification test interval is set to two times, namely 20min / 1mm and 5min / 0.7mm in chronological order. 20min / 1mm means that when the depth of the probe (252) into the test piece is ≥1mm, the test frequency is once every 20min. 5min / 0.7mm means that when the depth of the probe (252) into the test piece is between 0.7mm and 1mm, the test frequency is once every 5min.

17. The method for determining cement setting time as described in claim 15, characterized in that: In step 300, after the initial setting test start time is reached, the method for the initial setting time measuring device to measure the initial setting time of the test specimen includes the following steps: Step 301: The lifting drive assembly (21) drives the clamping assembly (23), the limiting assembly (24), and the measuring assembly (25) to move down together. At the same time, the distance detection assembly (22) detects the distance from the upper surface of the measuring assembly (25) to the test piece. When the distance from the upper surface of the measuring assembly (25) to the test piece is consistent with the length of the measuring assembly (25), it indicates that the test needle (252) has started to contact the test piece. At this time, the lifting drive assembly (21) is closed, and the clamping assembly (23), the limiting assembly (24), and the measuring assembly (25) no longer move down. Step 302: The clamping component (23) releases the measuring component (25), and the measuring component (25) falls freely. After 30 seconds, the distance from the upper surface of the measuring component (25) to the test piece is detected by the distance detection component (22). Then, the distance from the test needle (252) to the glass plate (111) is calculated by the controller (13) according to the following formula. : ， in, L is the height of the cylindrical test mold (112), and L is the length of the measuring component (25); Step 303: First, clamp the measuring component (25) with the clamping component (23). Then, the lifting drive component (21) drives the clamping component (23), the limiting component (24), and the measuring component (25) to move up together to the position where the test needle (252) is directly opposite the wiping component (12). Next, the wiping component (12) clamps the test needle (252) and drives the clamping component (23), the limiting component (24), and the measuring component (25) to move up and down together with the lifting drive component (21) to wipe the surface of the test needle (252) clean with the wiping component (12). Then, the lifting drive component (21) is turned off and the wiping component (12) is returned to its initial state. Step 304: The controller (13) determines whether the cement has reached the initial setting state. If 3mm ≤ 3mm in step 302 If the result is ≤5mm, it indicates that the cement is suspected to have reached the initial setting state. Immediately execute steps 305 and 301 to 304 once in sequence. If both test results indicate that the cement has reached the initial setting state, the initial setting time is taken as 30 seconds after the clamping component (23) is released from the measuring component (25) during the first test, and the initial setting time measurement ends. However, if the result of the second test shows that the cement has not reached the initial setting state, i.e. When >5mm, then according to The value and the initial setting test interval are used to determine the next initial setting time, and steps 305 and 306 are executed sequentially. If in step 302 >5mm, then according to The value and the initial setting test interval are used to determine the next initial setting time, and steps 305 and 306 are executed sequentially. Step 305: The trial mold rotation mechanism (9) drives the trial mold (11) to rotate clockwise by an angle, which is 360 degrees divided into 10~30 equal angles; Step 306: When the time reaches the next initial setting time determined in step 304, repeat steps 301 to 306 until the initial setting time measurement is completed.

18. The method for determining cement setting time as described in claim 15, characterized in that: In step 400, after the final setting test start time is reached, the method for the final setting time measuring device to measure the final setting time of the test specimen includes the following steps: Step 401: The lifting drive assembly (21) drives the clamping assembly (23), the limiting assembly (24), and the measuring assembly (25) to move down together. At the same time, the distance detection assembly (22) detects the distance from the upper surface of the measuring assembly (25) to the test piece. When the distance from the upper surface of the measuring assembly (25) to the test piece is consistent with the length of the measuring assembly (25), it indicates that the test needle (252) has started to contact the test piece. At this time, the lifting drive assembly (21) is closed, and the clamping assembly (23), the limiting assembly (24), and the measuring assembly (25) no longer move down. Step 402: The clamping component (23) releases the measuring component (25), and the measuring component (25) falls freely. After 30 seconds, the distance from the upper surface of the measuring component (25) to the test piece is detected by the distance detection component (22). Then, the depth of the probe (252) sinking into the test piece is calculated by the controller (13) according to the following formula. : ， Where L is the length of the measuring component (25); Step 403: First, clamp the measuring component (25) with the clamping component (23). Then, the lifting drive component (21) drives the clamping component (23), the limiting component (24), and the measuring component (25) to move up together to the position where the test needle (252) is directly opposite the wiping component (12). At this time, the annular attachment (10) is located on the upper side of the wiping component (12). Next, the wiping component (12) clamps the test needle (252) and drives the clamping component (23), the limiting component (24), and the measuring component (25) to move up and down together with the lifting drive component (21) to wipe the surface of the test needle (252) clean with the wiping component (12). Then, the lifting drive component (21) is turned off and the wiping component (12) is returned to its initial state. Step 404: The controller (13) determines whether the cement has reached its final setting state. If the conditions in step 402 are met... If the result is ≤0.5mm, it indicates that the cement is suspected to have reached the final setting state. Steps 405, 401 to 404 are immediately repeated twice in sequence. If the results of the three tests all indicate that the cement has reached the final setting state, the final setting time is taken as 30 seconds after the clamping component (23) is released from the measuring component (25) during the first test. The final setting time measurement is then ended. And if in step 402 >0.5mm, then according to The value and the final setting test interval are used to determine the next final setting time, and steps 405 and 406 are executed sequentially. Step 405: The trial mold rotation mechanism (9) drives the trial mold (11) to rotate clockwise by an angle, which is 360 degrees divided into 10~30 equal angles; Step 406: When the time reaches the next final setting time determined in step 404, repeat steps 401 to 406 until the final setting time measurement is completed.

Images