Device for detecting strength of limestone for calcining in rotary kiln and use method of device
By designing motor-driven clamping components and pressure components, the problems of unstable clamping of limestone samples and inaccurate test results in the prior art are solved, and flexible clamping of limestones of different sizes and high-precision strength detection are achieved.
Patent Information
- Application Number
- CN202411710959.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing limestone strength detection device cannot flexibly adjust the spacing of the jaws, resulting in poor clamping and fixing of limestone samples with irregular shapes, resulting in sample displacement, and can only clamp limestone of a single particle size or volume, resulting in test results. Inaccurate.
A clamping assembly including motor-driven is designed. Through the mechanical structure of threaded rods and movable blocks, the clamping and extrusion of clamping claws can be realized. The clamping claw spacing can be flexibly adjusted to adapt to limestone samples of different sizes. , and pressure tests are carried out on the limestone sample through the pressure component to regulate the accuracy of the test results.
The clamping stability of limestone samples is improved, the displacement problem caused by poor clamping effect is avoided, and the flexible clamping of limestones of different sizes is achieved, which improves the accuracy of the test results.
Smart Images
Figure CN119437922A_ABST
Abstract
Description
Technical Field
[0001] The patent of this invention relates to the field of limestone technology, specifically a limestone strength detection device for rotary kiln calcination and a method of using the same. Background Art
[0002] Limestone strength testing is an important part of evaluating limestone quality, including compressive and flexural strength tests, which respectively evaluate the mechanical properties of limestone under compression and stress, including compressive strength and flexural strength. These physical properties directly affect the use effect of limestone, reflect the ability of limestone to resist impact and friction, and determine whether it is brittle and whether it is suitable for use as a raw material for kiln calcination.
[0003] A clamping device is required when testing limestone samples. However, when testing irregularly shaped limestone samples, the clamping device cannot flexibly adjust the spacing between the jaws, resulting in poor clamping and fixing effects on the limestone samples, which in turn causes the limestone samples to move when pressure is applied. Summary of the invention
[0004] In view of the shortcomings of the prior art, the patent of the present invention provides a limestone strength detection device for rotary kiln calcination and a method of using the same, which has the advantages of being able to clamp and fix limestones of different sizes, thereby solving the problem that the limestone clamping device cannot clamp and fix limestones of different sizes.
[0005] The invention discloses a limestone strength testing device for calcining in a rotary kiln, comprising a workbench, a testing box is fixedly arranged on the top of the workbench, and clamping assemblies are arranged on the left and right sides of the testing box. The clamping assembly comprises a motor support seat, and the bottom of the motor support seat is fixedly connected to the top of the workbench, and a motor is fixedly arranged on the top of the motor support seat, and one end of the motor is fixedly connected to a threaded rod, and one end of the threaded rod penetrates and extends to the inner cavity of the testing box, and a threaded sleeve is provided on the surface of the threaded rod, and one end of the threaded sleeve penetrates the inner cavity of the testing box, and a mounting frame is provided on the surface of the threaded rod, and one side of the mounting frame is fixedly connected to the inner side of the testing box. The inner cavity and the surface threaded sleeve of the threaded rod are provided with a movable block, the top and bottom of the movable block are fixedly connected with two first connecting blocks, a first limiting rod is connected through the two first connecting blocks, a second connecting block is movably sleeved on the surface of the first limiting rod, one end of the second connecting block is movably connected to the limiting block through the second limiting rod, the limiting block passes through the inner cavity of the second connecting block and the second limiting rod, one side of the limiting block is fixedly connected with a clamping arm, one end of the clamping arm is movably connected to the mounting frame through a third limiting rod, the third limiting rod passes through the inner cavity of the clamping arm and the mounting frame, the other end of the clamping arm is connected through the fourth limiting rod, and the surface movable sleeve of the fourth limiting rod is provided with a clamping claw, The front and back sides of one end of the frame are movably connected to two connecting plates through a fifth limiting rod, and one end of the two connecting plates is movably connected to one end of the clamping claw through a sixth limiting rod. When clamping the limestone sample, the motor is started to drive the threaded rod to rotate through the motor, and the movable block is driven to move backward through the rotation of the threaded rod, and the first connecting block, the second connecting block and the clamping arm are driven to retract inward through the backward movement of the movable block, and the two clamping claws are driven to retract inward through the inward contraction of the first connecting block, the second connecting block and the clamping arm, and the limestone sample is clamped and fixed through the inward contraction of the two clamping claws. When it is necessary to release the limit of the limestone sample, the motor is reversed, and the threaded rod is driven to rotate through the reversal of the motor, and the movable block is driven to move backward through the rotation of the threaded rod The movable block moves forward, and the first connecting block, the second connecting block and the clamping arm are driven to expand outward by the movable block moving forward, and the two clamping claws are driven to expand outward by the first connecting block, the second connecting block and the clamping arm. The limestone sample is released from the limit by the outward expansion of the two clamping claws. The clamping assembly increases the stability of the limestone sample clamping, and avoids the poor clamping effect of the clamping assembly during use, resulting in poor clamping of the limestone sample and resulting in displacement. The user can flexibly adjust the spacing of the clamping claws according to the use requirements, and can clamp and fix limestone of different sizes, avoiding the problem that the clamping assembly can only clamp limestone samples of a single particle size or volume during use, resulting in inaccurate test results.
[0006] The patent of the present invention discloses a limestone strength testing device for rotary kiln calcination, wherein a pressure assembly is fixedly arranged on the top of the testing box, the pressure assembly includes a driving motor, the bottom of the driving motor passes through and extends to the interior of the testing box, one end of the driving motor is fixedly connected to a hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected to a pressure plate, and the limestone sample is pressure tested by the pressure assembly, and the pressure of the pressure assembly can be flexibly adjusted according to usage conditions, thereby improving the accuracy of the test results.
[0007] The patent of the present invention discloses a limestone strength detection device for rotary kiln calcination, wherein the outer surface fixing sleeve of the driving motor is provided with a limiting gasket, and the bottom of the limiting gasket is fixedly connected to the top of the detection box by a limiting screw. The cooperation of the limiting gasket and the limiting screw increases the stability of the driving motor, thereby increasing the stability of the pressure component and avoiding the shaking of the pressure component during operation.
[0008] The patent of the present invention is a limestone strength testing device for rotary kiln calcination, wherein a box door is arranged on the front of the testing box, an observation window is arranged on the front of the box door, and a handle is fixedly arranged on one side of the surface of the box door. By setting the observation window, it is convenient to observe the test conditions in the testing box, and the user can flexibly adjust the test equipment parameters according to the test conditions in the testing box.
[0009] The invention discloses a limestone strength testing device for rotary kiln calcination, wherein a heating device is fixedly arranged at the bottom of the inner cavity of the testing box, and both sides of the heating device are fixedly connected by fixing parts. By arranging the heating device, the working conditions in the rotary kiln are better simulated, so as to determine whether the limestone is suitable for rotary kiln calcination.
[0010] The patent of the present invention discloses a limestone strength testing device for rotary kiln calcination, wherein support columns are fixedly arranged at the four corners of the bottom of the workbench, and support pads are fixedly connected to the bottoms of the support columns. By arranging the workbench and the support pads, the stability of the workbench is increased, and shaking of the workbench during the detection process, which may lead to problems in the detection, is avoided.
[0011] The present invention discloses a method for testing the strength of limestone for calcining in a rotary kiln. The testing method comprises the following steps: Step 1: Select representative rock samples and cut them into cubes with a side length of 20-50mm using a stone cutting machine, or use a diamond machine to drill a cylinder with a diameter and height of 20-50mm. Then use a grinder to polish the two surfaces of the specimen in contact with the clamping claws. The shape of the specimen must be checked with a square. At least eight test blocks should be made. For rocks with significant stratification, two groups of specimens (16 pieces) should be taken to measure their strength values respectively. Step 2: Pull the door of the test box by the handle to open it, put the rock sample into the test box, clamp and fix the rock sample by the clamping assembly, and then close the door; Step 3: Start the heating device and the pressure assembly at the same time, and the pressure assembly is evenly loaded to 500-2000 kN within 50 seconds, stabilized for 5 seconds, and then unloaded; Step 4: Open the test box, take out the rock sample and weigh its mass (m0), use a square hole sieve with a nominal diameter of 3mm to screen out the crushed fine particles, and weigh the mass of the sample remaining on the sieve (m1); Rock compressive strength index δ α , should be calculated as follows (accurate to 0.1%): δ α = (m0-m1) / m0×100% Where δ α ——Compressive strength index (%); m0——mass of the sample (g); m1——mass of the sample remaining on the sieve after the crushing test (g); For rocks with significant stratification, the standard particle sizes (10.0-20.0 mm) below and above 20.0 mm should be tested separately, and the total compressive strength index δ α It should be calculated as follows: δ α =(α1δ α1 +α2δ α2 ) / (α1+α2)×100% Where δ α ——Total compressive strength index (%); α1, α2——the percentage of particles with nominal particle size below 20.0 mm and above 20.0 mm; δ α1 ,δ α2 ——The compressive strength index of the two particle sizes calculated based on the standard particle size test (%); The arithmetic mean of the three test results is taken as the compression index measurement value; Step 5: If the measured value of the compressive strength index is low, it means that the strength of the limestone is low. Conversely, if the measured value of the compressive strength index is high, it means that the strength of the limestone is high. This can be used to determine whether the limestone is suitable for rotary kiln calcination.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When clamping a limestone sample, the present invention starts the motor, drives the threaded rod to rotate through the motor, drives the movable block to move backward through the rotation of the threaded rod, drives the first connecting block, the second connecting block and the clamping arm to retract inward through the backward movement of the movable block, drives the two clamping claws to retract inward through the inward contraction of the first connecting block, the second connecting block and the clamping arm, and clamps and fixes the limestone sample through the inward contraction of the two clamping claws. When it is necessary to release the limit of the limestone sample, the motor is reversed, drives the threaded rod to rotate through the reverse rotation of the motor, drives the movable block to move forward through the rotation of the threaded rod, and drives the first connecting block, the second connecting block and the clamping arm to move forward through the forward movement of the movable block. The two connecting blocks and the clamping arm expand outwards, and the two clamping claws expand outwards through the outward expansion of the first connecting block, the second connecting block and the clamping arm, and the limestone sample is released from the limit through the outward expansion of the two clamping claws. The clamping assembly increases the stability of clamping the limestone sample, and avoids the poor clamping effect of the clamping assembly when in use, resulting in poor clamping of the limestone sample and resulting in displacement. The user can flexibly adjust the spacing between the clamping claws according to the use requirements, and can clamp and fix limestone of different sizes, avoiding the problem that the clamping assembly can only clamp limestone samples of a single particle size or volume when in use, resulting in inaccurate test results.
[0013] 2. The patent of this invention uses a pressure component to perform pressure testing on limestone samples. The pressure of the pressure component can be flexibly adjusted according to the usage, thereby improving the accuracy of the test results; The cooperation of the limit washer and the limit screw increases the stability of the drive motor, thereby increasing the stability of the pressure assembly and avoiding the shaking of the pressure assembly during operation. The observation window is set to facilitate observation of the test conditions in the test box, and the user can flexibly adjust the test equipment parameters according to the test conditions in the test box; By setting up a heating device, the working conditions in the rotary kiln can be better simulated to determine whether the limestone is suitable for calcination in the rotary kiln; By providing a workbench and a support pad, the stability of the workbench is increased, and shaking of the workbench during the detection process is avoided, which may lead to problems in the detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the patent structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the patented detection box of the present invention; Figure 3This is a schematic diagram of the structure of the clamping assembly of the present invention; Figure 4 This is a schematic diagram of the structure of the pressure component of the patent of this invention.
[0015] In the figure: 1. workbench; 2. detection box; 3. clamping assembly; 301. motor support seat; 302. motor; 303. threaded rod; 304. threaded sleeve; 305. mounting frame; 306. movable block; 307. first connecting block; 308. first limiting rod; 309. second connecting block; 310. limiting block; 311. second limiting rod; 312. clamping arm; 313. third limiting rod; 314. fourth limiting rod; 315. clamping claw; 316. connecting plate; 317. fifth limiting rod; 318. sixth limiting rod; 4. pressure assembly; 401. driving motor; 402. hydraulic cylinder; 403. pressure plate; 5. limiting gasket; 6. limiting screw; 7. observation window; 8. handle; 9. heating device; 10. support column; 11. support pad; 12. box door. DETAILED DESCRIPTION
[0016] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.
[0017] See also Figure 1-4The invention discloses a limestone strength testing device for calcining in a rotary kiln, comprising a workbench 1, a testing box 2 is fixedly arranged on the top of the workbench 1, and clamping components 3 are arranged on the left and right sides of the testing box 2. The clamping components 3 include a motor support seat 301, the bottom of the motor support seat 301 is fixedly connected to the top of the workbench 1, a motor 302 is fixedly arranged on the top of the motor support seat 301, a threaded rod 303 is fixedly connected to one end of the motor 302, one end of the threaded rod 303 penetrates and extends to the inner cavity of the testing box 2, a threaded sleeve 304 is movably sleeved on the surface of the threaded rod 303, one end of the threaded sleeve 304 penetrates the inner cavity of the testing box 2, a mounting frame 305 is movably sleeved on the surface of the threaded rod 303, and one side of the mounting frame 305 is connected to the testing box 2. The inner side of the measuring box 2 is fixedly connected, the inner cavity of the mounting frame 305 and the surface of the threaded rod 303 are threadedly sleeved with a movable block 306, the top and bottom of the movable block 306 are fixedly connected with two first connecting blocks 307, a first limiting rod 308 is penetrated and connected between the two first connecting blocks 307, a second connecting block 309 is movably sleeved on the surface of the first limiting rod 308, one end of the second connecting block 309 is movably connected to the limiting block 310 through the second limiting rod 311, the limiting block 310 penetrates the inner cavity of the second connecting block 309 and the second limiting rod 311, one side of the limiting block 310 is fixedly connected with a clamping arm 312, one end of the clamping arm 312 is movably connected to the mounting frame 305 through a third limiting rod 313, and the third limiting rod 313 penetrates The inner cavity of the clamping arm 312 and the mounting frame 305, the other end of the clamping arm 312 is penetrated and connected with a fourth limiting rod 314, the surface of the fourth limiting rod 314 is movably sleeved with a clamping claw 315, the front and back of one end of the mounting frame 305 are movably connected to two connecting plates 316 through a fifth limiting rod 317, one end of the two connecting plates 316 is movably connected to one end of the clamping claw 315 through a sixth limiting rod 318, when the limestone sample is clamped, the motor 302 is started, the threaded rod 303 is driven to rotate by the motor 302, the movable block 306 is driven to move backward by the rotation of the threaded rod 303, the first connecting block 307, the second connecting block 309 and the clamping arm 312 are retracted inward by the backward movement of the movable block 306, and the first connecting block 307, the second connecting block 309 and the clamping arm 312 are retracted inward by the first connecting The block 307, the second connecting block 309 and the clamping arm 312 contract inwardly, driving the two clamping claws 315 to contract inwardly, and the two clamping claws 315 contract inwardly to clamp and fix the limestone sample. When the limestone sample needs to be released from the limit, the motor 302 is reversed, and the threaded rod 303 is driven to rotate by the reverse rotation of the motor 302, and the movable block 306 is driven to move forward by the rotation of the threaded rod 303, and the first connecting block 307, the second connecting block 309 and the clamping arm 312 are driven to expand outwardly by the forward movement of the movable block 306, and the two clamping claws 315 are driven to expand outwardly by the outward expansion of the first connecting block 307, the second connecting block 309 and the clamping arm 312, and the limestone sample is released from the limit by the outward expansion of the two clamping claws 315.The clamping assembly 3 increases the stability of the limestone sample clamping, avoiding the poor clamping effect of the clamping assembly 3 during use, resulting in the displacement of the limestone sample. The user can flexibly adjust the spacing of the clamping jaws according to the use requirements, and can clamp and fix limestones of different sizes, avoiding the problem that the clamping assembly can only clamp limestone samples of a single particle size or volume during use, resulting in inaccurate test results.
[0018] A pressure assembly 4 is fixedly provided on the top of the detection box 2, and the pressure assembly 4 includes a driving motor 401. The bottom of the driving motor 401 passes through and extends to the interior of the detection box 2. One end of the driving motor 401 is fixedly connected to a hydraulic cylinder 402, and one end of the hydraulic cylinder 402 is fixedly connected to a pressure plate 403. The limestone sample is pressure tested by the pressure assembly 4. The pressure of the pressure assembly 4 can be flexibly adjusted according to usage conditions, thereby improving the accuracy of the test results.
[0019] A limiting gasket 5 is provided on the outer surface fixing sleeve of the driving motor 401, and the bottom of the limiting gasket 5 is fixedly connected to the top of the detection box 2 by a limiting screw 6. The cooperation of the limiting gasket 5 and the limiting screw 6 increases the stability of the driving motor 401, thereby increasing the stability of the pressure component 4 and avoiding the shaking of the pressure component 4 during operation.
[0020] A box door 12 is provided on the front of the test box 2, and an observation window 7 is provided on the front of the box door 12. A handle 8 is fixedly provided on one side of the surface of the box door 12. By providing the observation window 7, it is convenient to observe the test conditions in the test box 2, and the user can flexibly adjust the test equipment parameters according to the test conditions in the test box 2.
[0021] A heating device 9 is fixedly provided at the bottom of the inner cavity of the detection box 2, and both sides of the heating device 9 are fixedly connected by fixing parts. By providing the heating device 9, the working conditions in the rotary kiln are better simulated to determine whether the limestone is suitable for calcination in the rotary kiln.
[0022] Support columns 10 are fixedly provided at the four corners of the bottom of the workbench 1, and support pads 11 are fixedly connected to the bottom of the support columns 10. By setting the workbench 10 and the support pads 11, the stability of the workbench 1 is increased, and shaking of the workbench 1 during the detection process, which may cause problems in the detection, is avoided.
[0023] The present invention discloses a method for testing the strength of limestone for calcining in a rotary kiln. The testing method comprises the following steps: Step 1: Select a representative rock sample and cut it into a cube with a side length of 20-50 mm using a stone cutting machine, or use a diamond machine to drill a cylinder with a diameter and height of 20-50 mm, and then use a grinder to polish the two surfaces of the test piece that contact the clamping claw 315. The shape of the test piece must be checked with a square. At least eight test pieces should be made. For rocks with significant stratification, two groups of test pieces (sixteen pieces) should be taken to measure their strength values respectively; Step 2: Pull the door 12 through the handle 8 to open the detection box 2, put the rock sample into the detection box 2, clamp and fix the rock sample through the clamping assembly 3, and then close the door 12; Step 3: Start the heating device 9 and the pressure assembly 4 at the same time, and the pressure assembly is uniformly loaded to 500-2000 kN within 450 seconds, stabilized for 5 seconds, and then unloaded; Step 4: Open the test box 2, take out the rock sample and weigh its mass (m0), use a square hole sieve with a nominal diameter of 3 mm to sieve out the crushed fine particles, and weigh the mass of the sample remaining on the sieve (m1); Rock compressive strength index δ α , should be calculated as follows (accurate to 0.1%): δ α = (m0-m1) / m0×100% Where δ α ——Compressive strength index (%); m0——mass of the sample (g); m1——mass of the sample remaining on the sieve after the crushing test (g); For rocks with significant stratification, the standard particle sizes (10.0-20.0 mm) below and above 20.0 mm should be tested separately, and the total compressive strength index δ α It should be calculated as follows: δ α =(α1δ α1 +α2δ α2 ) / (α1+α2)×100% Where δ α ——Total compressive strength index (%); α1, α2——the percentage of particles with nominal particle size below 20.0 mm and above 20.0 mm; δ α1 ,δ α2 ——The compressive strength index of the two particle sizes calculated based on the standard particle size test (%); The arithmetic mean of the three test results is taken as the compression index measurement value; Step 5: If the measured value of the compressive strength index is low, it means that the strength of the limestone is low. Conversely, if the measured value of the compressive strength index is high, it means that the strength of the limestone is high. This can be used to determine whether the limestone is suitable for rotary kiln calcination.
[0024] When using the patent of the present invention: when clamping the limestone sample, start the motor 302, drive the threaded rod 303 to rotate through the motor 302, and drive the movable block 306 to move backward through the rotation of the threaded rod 303, and drive the first connecting block 307, the second connecting block 309 and the clamping arm 312 to retract inward through the backward movement of the movable block 306, and drive the two clamping claws 315 to retract inward through the inward contraction of the first connecting block 307, the second connecting block 309 and the clamping arm 312, and clamp the limestone sample by the inward contraction of the two clamping claws 315. When the limestone sample needs to be released, When limiting, the motor 302 reverses, and the threaded rod 303 rotates through the reverse rotation of the motor 302, and the movable block 306 moves forward through the rotation of the threaded rod 303, and the first connecting block 307, the second connecting block 309 and the clamping arm 312 are driven to expand outward through the forward movement of the movable block 306, and the two clamping claws 315 are driven to expand outward through the outward expansion of the first connecting block 307, the second connecting block 309 and the clamping arm 312, and the limestone sample is released from the limit through the outward expansion of the two clamping claws 315, so that the clamping assembly 3 increases the stability of the limestone sample and avoids the clamping assembly 3 is not clamped well during use, resulting in the situation that the limestone sample is not clamped well and is displaced. The user can flexibly adjust the spacing of the clamping jaws according to the use requirements, and can clamp and fix limestones of different sizes, avoiding the problem that the clamping component can only clamp limestone samples of a single particle size or volume during use, resulting in inaccurate test results. The limestone sample is pressure tested by the pressure component 4, and the pressure of the pressure component 4 can be flexibly adjusted according to the use situation, thereby improving the accuracy of the test results. The limit washer 5 and the limit screw 6 are matched to increase the drive motor 401. The stability is increased, thereby increasing the stability of the pressure component 4 and avoiding the shaking of the pressure component 4 during operation. By setting the observation window 7, it is convenient to observe the test conditions in the test box 2, and the user can flexibly adjust the test equipment parameters according to the test conditions in the test box 2. By setting the heating device 9, the working conditions in the rotary kiln are better simulated to determine whether the limestone is suitable for calcination in the rotary kiln. By setting the workbench 10 and the support pad 11, the stability of the workbench 1 is increased, avoiding the shaking of the workbench 1 during the detection process, which may lead to problems in the detection.
[0025] The above is only an implementation method of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.
Claims
1. A limestone strength testing device for rotary kiln calcination, comprising a workbench (1), characterized in that: A detection box (2) is fixedly arranged on the top of the workbench (1), and clamping assemblies (3) are arranged on both the left and right sides of the detection box (2), and the clamping assembly (3) comprises a motor support seat (301), the bottom of the motor support seat (301) is fixedly connected to the top of the workbench (1), and a motor (302) is fixedly arranged on the top of the motor support seat (301), and one end of the motor (302) is fixedly connected to a threaded rod (303), and one end of the threaded rod (303) passes through and extends to the inner cavity of the detection box (2), and the threaded rod (303) is fixedly connected to the top of the motor support seat (301). The surface movable sleeve of the (303) is provided with a threaded sleeve (304), one end of the threaded sleeve (304) penetrates the inner cavity of the detection box (2), the surface movable sleeve of the threaded rod (303) is provided with a mounting frame (305), one side of the mounting frame (305) is fixedly connected to the inner side of the detection box (2), the inner cavity of the mounting frame (305) and the surface threaded sleeve of the threaded rod (303) are provided with a movable block (306), the top and bottom of the movable block (306) are fixedly connected to two first connection blocks (307), and the two first connection blocks (307) are fixedly connected to the two first connection blocks (307). 07) is connected through a first limiting rod (308), a second connecting block (309) is movably sleeved on the surface of the first limiting rod (308), one end of the second connecting block (309) is movably connected to a limiting block (310) through a second limiting rod (311), the limiting block (310) passes through the inner cavity of the second connecting block (309) and the second limiting rod (311), one side of the limiting block (310) is fixedly connected to a clamping arm (312), one end of the clamping arm (312) is connected to the installation frame (305) through a third limiting rod (313). ) are movably connected, the third limiting rod (313) passes through the inner cavity of the clamping arm (312) and the mounting frame (305), the other end of the clamping arm (312) passes through and is connected with a fourth limiting rod (314), the surface of the fourth limiting rod (314) is movably sleeved with a clamping claw (315), the front and back sides of one end of the mounting frame (305) are movably connected to two connecting plates (316) through a fifth limiting rod (317), and one end of the two connecting plates (316) is movably connected to one end of the clamping claw (315) through a sixth limiting rod (318).
2. The limestone strength detection device for rotary kiln calcination according to claim 1, characterized in that: A pressure assembly (4) is fixedly arranged on the top of the detection box (2), the pressure assembly (4) comprising a drive motor (401), the bottom of the drive motor (401) passing through and extending into the interior of the detection box (2), one end of the drive motor (401) being fixedly connected to a hydraulic cylinder (402), and one end of the hydraulic cylinder (402) being fixedly connected to a pressure plate (403).
3. A limestone strength detection device for rotary kiln calcination according to claim 2, characterized in that: A limiting gasket (5) is fixedly sleeved on the outer surface of the driving motor (401), and the bottom of the limiting gasket (5) is fixedly connected to the top of the detection box (2) via a limiting screw (6).
4. The limestone strength detection device for rotary kiln calcination according to claim 1, characterized in that: The front of the detection box (2) is provided with a box door (12), the front of the box door (12) is provided with an observation window (7), and a handle (8) is fixedly provided on one side of the surface of the box door (12).
5. The limestone strength detection device for rotary kiln calcination according to claim 1, characterized in that: A heating device (9) is fixedly arranged at the bottom of the inner cavity of the detection box (2), and both sides of the heating device (9) are fixedly connected via fixing parts.
6. A limestone strength detection device for rotary kiln calcination according to claim 1, wherein support columns (10) are fixedly arranged at the four corners of the bottom of the workbench (1), and support pads (11) are fixedly connected to the bottoms of the support columns (10).
7. A method for testing the strength of limestone for calcining in a rotary kiln, characterized in that: The detection method is as follows: Step 1: Select a representative rock sample and cut it into a cube with a side length of 20-50 mm using a stone cutting machine, or use a diamond machine to drill a cylinder with a diameter and height of 20-50 mm, and then use a grinder to polish the two surfaces of the test piece in contact with the clamping claw (315). The shape of the test piece must be checked with a square. At least eight test pieces should be made. For rocks with obvious stratification, two groups of test pieces (sixteen pieces) should be taken to measure their strength values respectively; Step 2: Pull the box door (12) through the handle (8) to open the detection box (2), put the rock sample into the detection box (2), clamp and fix the rock sample through the clamping assembly (3), and then close the box door (12); Step 3: The heating device (9) and the pressure assembly (4) are started simultaneously, and the pressure assembly (4) is uniformly loaded to 500-2000 kN within 50 seconds, stabilized for 5 seconds, and then unloaded; Step 4: Open the test box (2), take out the rock sample and weigh its mass (m0), use a square hole sieve with a nominal diameter of 3 mm to sieve out the crushed fine particles, and weigh the mass of the sample remaining on the sieve (m1); Rock compressive strength index δ α , should be calculated as follows (accurate to 0.1%): d α =(m0-m1) / m0×100% Where δ α ——Compressive strength index (%); m0——mass of the sample (g); m1——mass of the sample remaining on the sieve after the crushing test (g); For rocks with significant stratification, the standard particle sizes (10.0-20.0 mm) below and above 20.0 mm should be tested separately, and the total compressive strength index δ α It should be calculated as follows: d α =(α1δ α1 +a2d α2 ) / (α1+α2)×100% Where δ α ——Total compressive strength index (%); α1, α2——the percentage of particles with nominal particle size below 20.0 mm and above 20.0 mm; δ α1 ,δ α2 ——The compressive strength index of the two particle sizes calculated based on the standard particle size test (%); The arithmetic mean of the three test results is taken as the compression index measurement value; Step 5: If the measured value of the compressive strength index is low, it means that the strength of the limestone is low. Conversely, if the measured value of the compressive strength index is high, it means that the strength of the limestone is high. This can be used to determine whether the limestone is suitable for rotary kiln calcination.