Full-automatic cement setting time tester

Abstract

The invention relates to the technical field of cement determination, in particular to a full-automatic cement setting time determinator which comprises an environmental box, a box cover is arranged on the top of the environmental box, a test piece positioning system is arranged on a bottom plate of the environmental box, a determination system is fixedly connected to a box body, a humidifier is communicated with a side plate of the environmental box, and the upper portion of the box cover is communicated with a temperature control module. The test piece positioning system is provided with a rotating disc, a plurality of test molds are arranged in the circumferential direction of the rotating disc, each test mold is fixed through two test mold frames, one end of one test mold frame penetrates through the rotating support, one end of the other test mold frame is sleeved with a spring, and the test mold frames can rotate around the center axis of the reverse rotating shaft; and the initial coagulation needle and the final coagulation needle are fixedly connected to the orientation module. Through cooperative operation of the environment box, the test piece positioning system and the measuring system, full-process automation of cement setting time measuring is achieved, manual intervention errors are avoided, and the measuring precision and the measuring accuracy are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cement determination, and particularly relates to a fully automatic cement setting time tester. Background Art

[0002] The cement setting time is used to characterize the time change characteristics of the setting of the cement after being mixed with water, and is a key index for evaluating the performance of cement. The accuracy of its measurement results directly affects the quality of construction projects. The standard for measuring the cement setting time is JC / T 727-2005 Cement Paste Standard Consistency and Setting Time Tester, and the Vicat apparatus is manually operated to measure the initial setting time and the final setting time. The standard measurement method requires independent processes of specimen molding, standard curing, initial setting time measurement, specimen flipping, and final setting time measurement. Most of the existing cement setting time testers are limited to the measurement of a single process of the initial setting or final setting time. During this period, manual operations are required frequently, and the manual intervention error is large and the process continuity is poor.

[0003] Chinese Patent CN219533154U discloses a cement setting time tester. A plurality of test cups and cleaning cups are arranged at intervals on the chassis of the tester frame. The rotating motor drives the test cups to rotate under the measuring needle, and the telescopic machine descends to make the measuring needle enter the test cup for measurement. After the measurement is completed, the telescopic machine rises, and the rotating motor drives the cleaning cup under the measuring needle, and the telescopic machine descends to clean the measuring needle, and rotates in a cycle until the measurement of all specimens is completed. This invention patent realizes the automatic operation of the cement setting time tester and improves the working efficiency of the tester. However, this measurement process only realizes the measurement of the initial setting or final setting time process of the cement, and the specimen removal and specimen flipping still need to be manually operated to complete, which increases the manual error and affects the accuracy of the measurement results. Summary of the Invention

[0004] The existing cement setting time measuring instrument has problems of large manual errors and poor process continuity. In view of this problem, the present invention provides a fully automatic cement setting time measuring instrument, which includes an environmental chamber, a specimen positioning system, and a measuring system. The top of the environmental chamber is equipped with a lid. The specimen positioning system is fixedly arranged on the bottom plate of the environmental chamber, and the measuring system is fixedly connected to the box body. The environmental chamber is an L-shaped cavity. A humidifier communicating with the L-shaped cavity is arranged on the outer surface of the side plate of the environmental chamber. The humidifier is fixedly connected to a water storage tank through a water pipe to ensure stable curing humidity for the test mold. The upper part of the lid is fixedly communicated with a temperature control module to facilitate providing a stable curing temperature for the test mold. Two groups of moisture-proof covers are arranged on the lid. The moisture-proof covers can be rotated and opened or closed by a stepping motor. A camera is arranged obliquely above one of the moisture-proof covers to facilitate observing the measurement process of the test mold. The specimen positioning system is provided with a turntable, and a plurality of test molds are evenly arranged along the circumferential direction of the turntable, which can meet the measurement of multiple groups of test molds at a time. A glass sheet is arranged at the bottom of the test mold. Each test mold is fixedly clamped by two semi-circular test mold frames. One end of one test mold frame penetrates through a rotating bracket, and one end of the other test mold frame is sleeved with a spring. The end of the test mold frame is adapted to a reverse rotation shaft, and the test mold frame can rotate around the central axis of the reverse rotation shaft to realize 180° automatic flipping of the specimen. The bottom of the turntable is fixedly connected with a large pulley through a rotating shaft, and the large pulley is connected by a transmission belt to rotate synchronously with a small pulley. The measuring system includes an initial setting needle and a final setting needle. Both the initial and final setting needles are fixedly connected to an azimuth module, and the azimuth module can move arbitrarily in the horizontal and vertical directions. The initial and final setting needles are fixedly connected to a test rod through bearings. The test rod penetrates through a U-shaped fixing seat. A motor is installed inside the U-shaped fixing seat. The motor is connected to a needle lifting screw rod. A laser displacement meter is fixedly connected to the top of the U-shaped fixing seat to record the moving distance of the test needle.

[0005] Further, a test mold bottom plate is arranged at the lower part of the rotating bracket. The test mold bottom plate is sleeved on the lower part of the test mold. One end of the test mold bottom plate can be adapted to a pulling block. The pulling block is fixedly connected to a link. The link rotates through two gears. One end of the reverse rotation shaft is connected to a stepping motor through a transmission belt. A motor is fixedly arranged on the top of the small pulley.

[0006] Further, a slider a is arranged at the bottom of the azimuth module. The slider a can move horizontally and linearly along a guide rail. A guide rod is fixedly arranged at the side part of the azimuth module. A slider b is sleeved on the guide rod, and the slider b can slide up and down freely. Two groups of electromagnets are arranged at the lower part of the U-shaped fixing seat. Two groups of needle cleaning clips are arranged between the two groups of electromagnets to ensure cleaning the test needle head after each test.

[0007] Furthermore, a ventilation grille is fixedly arranged outside the measuring system, and a door panel is opened, which is convenient for checking and maintaining the equipment.

[0008] The beneficial effects of the present invention are as follows: 1. Through the coordinated operation of the environmental chamber, specimen positioning system, and measurement system, the present invention realizes the full-process automation of wet temperature curing of specimens, determination of initial setting time, automatic flipping of specimens by 180°, and determination of final setting time. The turntable-type multi-station design is adopted and combined with a reverse rotation shaft to avoid the traditional manual flipping of test molds. The precise positioning of the azimuth module eliminates the manual operation errors in successive tests. The test needle is double-positioned by a laser displacement meter and an electromagnet sensor, improving the measurement resolution. The intelligent integrated cement setting time measuring instrument effectively solves the problem of process discreteness caused by manual intervention and significantly improves the accuracy of measurement results. 2. The present invention proposes a turntable-type multi-station design, which can process multiple groups of test molds in a single test cycle. By connecting the spring and reverse rotation shaft components through a test mold holder and then cooperating with a chain drive device, the 180° automatic flipping of the test mold can be quickly completed. The alternating operation mode of the double-needle measurement system can simultaneously measure the initial setting and final setting times of different test molds without mutual interference, improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is the left top view of the partial structure of the full-automatic cement setting time measuring instrument of the present invention; Figure 2 is the right top view of the partial structure of the full-automatic cement setting time measuring instrument of the present invention; Figure 3 is the structural diagram of the specimen positioning system of the full-automatic cement setting time measuring instrument of the present invention; Figure 4 For the present invention Figure 1 is the partial enlarged view at A in; Figure 5 is the detailed view of the reverse rotation shaft structure of the full-automatic cement setting time measuring instrument of the present invention; Figure 6 is the overall structural diagram of the full-automatic cement setting time measuring instrument of the present invention.

[0010] Among them, the respective numbers are: 1. Environmental chamber, 11. Chamber cover, 12. Humidifier, 13. Temperature control module, 14. Moisture-proof cover, 15. Camera, 16. Water storage tank; 2. Specimen positioning system, 21. Turntable, 22. Test mold, 23. Glass sheet, 24. Test mold holder, 25. Rotating bracket, 26. Spring, 27. Reverse rotation shaft, 28. Rotating shaft, 29. Large pulley, 210. Small pulley, 211. Test mold bottom plate, 212. Pulling block, 213. Chain link, 214. Gear; 3. Measuring system, 31. Initial setting needle, 32. Final setting needle, 33. Test rod, 34. U-shaped fixing base, 35. Needle lifting screw rod, 36. Laser displacement meter, 37. Slide block a, 38. Guide rail, 39. Guide rod, 310. Slide block b, 311. Electromagnet, 312. Needle wiping clip; 4. Ventilation grille; 5. Door panel. Specific implementation manner

[0011] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0012] As Figure 1 、 2 As shown in FIGS. 5 and 6, the present invention provides a fully automatic cement setting time measuring instrument, including an environmental chamber 1, a specimen positioning system 2 and a measuring system 3. The top of the environmental chamber 1 is equipped with a chamber cover 11. The specimen positioning system 2 is fixedly provided on the bottom plate of the environmental chamber 1. The measuring system 3 is fixedly connected to the box body. A ventilation grille 4 is fixedly provided outside the measuring system 3, and a door panel 5 is opened, which is convenient for inspecting and maintaining the equipment; As Figure 1 and 2 As shown in FIGS. 6 and 7, the environmental chamber 1 is an L-shaped cavity body. A humidifier 12 communicating with the L-shaped cavity body is provided on the outer surface of the side plate of the environmental chamber 1. The humidifier 12 is fixedly connected to a water storage tank 16 through a water pipe to provide a stable curing humidity for the test mold 22. The upper part of the chamber cover 11 is fixedly communicated with a temperature control module 13 to facilitate providing a stable curing temperature for the test mold. Two groups of moisture preservation covers 14 are provided on the chamber cover 11. The moisture preservation covers 14 can be rotated and opened or closed by a stepping motor. When curing the test mold 22, the moisture preservation covers 14 are closed. When measuring the test mold 22, the moisture preservation covers 14 are opened. A camera 15 is provided obliquely above the moisture preservation cover 14 corresponding to the final setting needle 32, which is convenient for observing and recording the measuring process of the test mold 22; As Figure 3 and 5As shown in the figure, the specimen positioning system 2 is provided with a turntable 21, and a plurality of test molds 22 are evenly arranged along the circumferential direction of the turntable 21, which can meet the determination of multiple groups of test molds 22 at a time. A glass sheet 23 is provided at the bottom of the test mold 22, and the glass sheet 23 is in direct contact with the bottom of the test mold 22. Each test mold 22 is fixed by two test mold brackets 24. One end of one test mold bracket 24 penetrates through the rotating bracket 25, and one end of the other test mold bracket 24 is sleeved with a spring 26. A test mold bottom plate 211 is provided at the lower part of the rotating bracket 25. The test mold bottom plate 211 is sleeved at the lower part of the test mold 22. One end of the test mold bottom plate 211 can be adapted to the pulling block 212. The pulling block 212 is fixedly connected to the link 213. The link 213 is connected and rotated by two gears 214. The end of the test mold bracket 24 is adapted to the reverse rotation shaft 27. One end of the reverse rotation shaft 27 is connected to the stepping motor through a transmission belt. When the gear 214 rotates and pulls out the test mold bottom plate 211 through the pulling block 212, the spring 26 is in a stretched state at this time. After the stepping motor drives the reverse rotation shaft 27 to realize the automatic 180° flip of the test mold 22, the motor is turned off, and the test mold 22 is reset by the contraction force of the spring 26; the bottom of the turntable 21 is fixedly connected to the large belt pulley 29 through the rotating shaft 28. The large belt pulley 29 is synchronously rotated with the small belt pulley 210 through a transmission belt connection. A motor is fixedly provided at the top of the small belt pulley 210; As Figure 1 and 4 shown in the figure, the determination system 3 includes an initial setting needle 31 and a final setting needle 32. The initial setting needle 31 and the final setting needle 32 are fixedly connected to the azimuth module. A slider a 37 is provided at the bottom of the azimuth module. The slider a 37 can move horizontally and linearly along the guide rail 38. A guide rod 39 is fixedly provided at the side of the azimuth module. A slider b 310 is sleeved on the guide rod 39. The slider b 310 can slide up and down freely. The initial setting needle 31 and the final setting needle 32 are fixedly connected to the test rod 33 through bearings. The test rod 33 penetrates through the U-shaped fixing seat 34. A motor is installed inside the U-shaped fixing seat 34. The motor is connected with a needle lifting lead screw 35. A laser displacement meter 36 is fixedly connected to the top of the U-shaped fixing seat 34 to record the moving distance of the test needle. Two groups of electromagnets 311 are provided at the lower part of the U-shaped fixing seat 34. Two groups of needle wiping clips 312 are provided between the two groups of electromagnets 311 to ensure the cleaning of the test needle head after each test.

[0013] Working principle of the present invention: First, close the moisture-proof cover 14, perform standard humidity and temperature curing on the test mold 22 in the environmental chamber 1. After the curing is completed, the motor rotates the turntable 2 through the belt pulley, so that the test mold 22 rotates to the lower part of the moisture-proof cover 14. Open the moisture-proof cover 14, and the orientation module adjusts the initial setting needle 31 to the upper part of the moisture-proof cover 14 through the slider a 37. The slider b 310 moves up and down to adjust the initial setting needle 31, so that the initial setting needle 31 contacts the surface of the test mold 22. Then, the initial setting needle 31 drives the test rod 33 to freely sink into the test mold 22. After the test needle stops sinking, at this time, the laser displacement sensor 36 records the moving distance of the initial setting needle 31. When the test needle sinks to a distance of 4 mm ± 1 mm from the bottom plate, it is confirmed that the cement has reached the initial setting state. After the test is completed, the needle lifting screw rod 35 lifts the initial setting needle 31 out of the test mold 22, and the orientation module adjusts the initial setting needle 31 to the middle of the two needle cleaning clips 312. At this time, the electromagnet 311 drives the needle cleaning clips 312 through the guide block, and the two needle cleaning clips 312 clamp the needle head of the initial setting needle 31 for cleaning. After the cleaning is completed, repeat the above steps to perform the second test on the test mold 22. When the two results are the same, it means that the cement has reached the initial setting state; Secondly, the motor continues to rotate the turntable 2 through the belt pulley. When the end of the test mold holder 24 is connected to the card slot of the reverse rotation shaft 27, the turntable 2 stops rotating. At this time, the pull block 212 is just connected to the test mold bottom plate 211. The gear 214 rotates, and drives the test mold bottom plate 211 to pull out the test mold 22 through the pull block 212. At this time, the spring 26 is in a stretched state. The stepping motor drives the reverse rotation shaft 27 to make the test mold 22 automatically flip 180° in place and then contact the glass sheet 23. Turn off the motor, and the spring 26 makes the test mold 22 reset due to the contraction force. During this process, the second test mold 22 has completed the measurement of the initial setting time; Finally, close the moisture-proof cover 14, continue to cure the test mold 22, and the turntable 2 continues to rotate, so that the inverted test mold 22 rotates to the bottom of the final setting needle 32 position, and the second test mold 22 rotates to the position of the reverse rotation shaft 27. After the curing is completed, open the moisture-proof cover 14. The azimuth module adjusts the final setting needle 32 to the upper part of the inverted test mold 22 through the slider a37. The slider b310 moves up and down to adjust the final setting needle 32 to a suitable position. Observe through the camera 15. When the test needle sinks into the test mold 22 by 0.5 mm and the annular attachment at the end of the final setting needle 32 no longer leaves a mark on the surface of the test mold 22, it means that the cement has reached the final setting state. After the test is completed, the needle lifting screw rod 35 lifts the final setting needle 32 out of the test mold 22, and the azimuth module adjusts the final setting needle 32 to the middle of the two groups of needle cleaning clips 312. At this time, the electromagnet 311 drives the needle cleaning clips 312 through the guide block, and the two groups of needle cleaning clips 312 clamp the needle head of the final setting needle 32 for cleaning. After the cleaning is completed, the azimuth module adjusts the position of the final setting needle 32, selects two other different test points on the inverted test mold 22, and repeats the above process. When the test results are the same, it means that the cement has reached the final setting state. At the same time, the second test mold 22 has completed an automatic 180° flip, and the third test mold 22 has also completed the determination of the initial setting time. The turntable 2 continues to rotate until all the test molds 22 have completed the determination.

[0014] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic cement setting time tester, comprising an environmental chamber (1), a specimen positioning system (2) and a measurement system (3), characterized in that, The top of the environmental chamber (1) is equipped with a chamber cover (11). A specimen positioning system (2) is fixedly provided on the bottom plate of the environmental chamber (1). The measuring system (3) is fixedly connected to the chamber body. The environmental chamber (1) is an L-shaped chamber body. A humidifier (12) communicating with the L-shaped chamber body is provided on the outer surface of the side plate of the environmental chamber (1). The upper part of the chamber cover (11) is fixedly communicated with a temperature control module (13). The specimen positioning system (2) is provided with a turntable (21). A plurality of test molds (22) are evenly arranged along the circumferential direction of the turntable (21). A glass sheet (23) is provided at the bottom of the test mold (22). Each test mold (22) is fixed by two test mold frames (24). One end of one of the test mold frames (24) penetrates through a rotating bracket (25). One end of the other test mold frame (24) is sleeved with a spring (26). The end of the test mold frame (24) is adapted to a reverse rotation shaft (27). The test mold frame (24) can rotate around the central axis of the reverse rotation shaft (27) to realize the automatic 180° flip of the specimen. The bottom of the turntable (21) is fixedly connected to a large belt pulley (29) through a rotating shaft (28). The large belt pulley (29) is connected by a transmission belt to synchronously rotate with a small belt pulley (210). The measuring system (3) includes an initial setting needle (31) and a final setting needle (32). The initial setting needle (31) and the final setting needle (32) are fixedly connected to an azimuth module. The azimuth module can move arbitrarily in the horizontal and vertical directions. The initial setting needle (31) and the final setting needle (32) are fixedly connected to a test rod (33) through bearings. The test rod (33) penetrates through a U-shaped fixing seat (34). A motor is installed inside the U-shaped fixing seat (34). The motor is connected to a needle lifting lead screw (35). A laser displacement meter (36) is fixedly connected to the top of the U-shaped fixing seat (34).

2. The fully automatic cement setting time tester according to claim 1, characterized in that, A test mold bottom plate (211) is provided at the lower part of the rotating bracket (25). The test mold bottom plate (211) is sleeved on the lower part of the test mold (22). One end of the test mold bottom plate (211) can be adapted to a pulling block (212). The pulling block (212) is fixedly connected to a link (213). The link (213) is connected and rotated through two gears (214). One end of the reverse rotation shaft (27) is connected to a stepping motor through a transmission belt. A motor is fixedly provided at the top of the small belt pulley (210).

3. The fully automatic cement setting time measuring instrument according to claim 1, wherein, A slider a (37) is provided at the bottom of the azimuth module. The slider a (37) can move horizontally in a straight line along a guide rail (38). A guide rod (39) is fixedly provided at the side part of the azimuth module. A slider b (310) is sleeved on the guide rod (39). The slider b (310) can slide up and down freely. Two groups of electromagnets (311) are provided at the lower part of the U-shaped fixing seat (34). Two groups of needle wiping clip pieces (312) are provided between the two groups of electromagnets (311).

4. The fully automatic cement setting time measuring instrument according to claim 1, characterized in that, Two groups of moisturizing covers (14) are provided on the box cover (11), and the moisturizing covers (14) can be rotated by a stepping motor. A camera (15) is provided obliquely above one of the moisturizing covers (14). The humidifier (12) is fixedly connected to the water storage tank (16) through a water pipe.

5. The fully automatic cement setting time measuring instrument according to claim 1, characterized in that, A ventilation grille (4) is fixedly provided outside the measurement system (3).

6. The fully automatic cement setting time measuring instrument according to claim 1, characterized in that, A door panel (5) is provided outside the measurement system (3).

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