A detection mechanism for stability of autoclaved aerated concrete slurry

Abstract

The application discloses a kind of autoclaved aerated concrete slurry stability detection mechanism, comprising: test box, centrifugal turntable, coupling driving mechanism and the environment control system for controlling temperature and humidity inside test box, the top surface of test box is equipped with sealing cover and the control lever for driving sealing cover open-close movement, the inside fixed mounting of test box has bracket, the bottom surface of centrifugal turntable is equipped with rotation installation in the surface of bracket axle pedestal, coupling driving mechanism is fixedly installed on the surface of bracket.The application, by setting new centrifugal test structure, centrifugal turntable is driven high-speed rotation movement using coupling driving mechanism, by free deflection motion's swing sleeve and sample cylinder inclination, using centrifugal force to compensate the deficiency of gravity, accelerate concrete slurry's sedimentation test, to react slurry stability according to the height difference of upper part and lower part of slurry, significantly improve test efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete detection, in particular to a detection mechanism for the stability of autoclaved aerated concrete slurry. BACKGROUND

[0002] Autoclaved aerated concrete slurry is a special kind of concrete slurry, mainly composed of cement, lime, silicate material, aluminum powder, gypsum and other raw materials. Through a special production process, these raw materials are mixed and stirred, then a proper amount of foaming agent is added, and then the aerated reaction is carried out in a high-pressure steam environment to produce a large number of bubbles and form lightweight concrete. The stability of the existing concrete slurry can be measured in the following ways: 1. Flowability measurement: the flowability of the concrete slurry is measured by a flowability meter, i.e. the distance of the slurry flowing out of the funnel within a certain time. The greater the flowability, the worse the stability of the slurry. 2. Slurry slump test: the concrete slurry is poured into a conical mold with a slump cone, and the slump of the slurry is measured. The greater the slump, the worse the stability of the slurry. 3. Settlement test: fill the measuring cylinder with concrete slurry, and after a certain period of time, measure the height difference between the upper and lower parts of the slurry. The greater the height difference, the worse the stability of the slurry.

[0003] In the detection of the stability of autoclaved aerated concrete slurry, the slurry slump test and the settlement test are still mainly used. The preparation time for these experiments is long, the measurement with the slump cone has high randomness, and the test results cannot accurately reflect the stability of the concrete slurry. In addition, the test method using a measuring cylinder for fine concrete slurry is time-consuming and is greatly affected by the ambient temperature. Moreover, the concrete is prone to solidification during long-term standing, making it difficult to operate. Therefore, the existing problems need to be improved. SUMMARY

[0004] The present application aims to solve the technical problems in the prior art or related art.

[0005] Therefore, the technical solution adopted by the present invention is as follows: a testing mechanism for the stability of autoclaved aerated concrete slurry, comprising: a test chamber, a centrifugal turntable, a coupling drive mechanism, and an environmental control system for controlling the internal temperature and humidity of the test chamber. The top surface of the test chamber is provided with a sealing cover and a control rod for driving the opening and closing movement of the sealing cover. A bracket is fixedly installed inside the test chamber. The bottom surface of the centrifugal turntable is provided with a shaft seat rotatably mounted on the surface of the bracket. The coupling drive mechanism is fixedly installed on the surface of the bracket. The surface of the centrifugal turntable is provided with a plurality of swing grooves and a swing sleeve is rotatably mounted on the inner side of the swing grooves. A sample measuring cylinder is detachably sleeved on the inner side of the swing sleeve.

[0006] The coupling drive mechanism includes a drive motor, a fixed base, a ball joint coupling, and an electromagnetic clutch assembly. The fixed base is fixed to the surface of the bracket and sleeved on the outside of the ball joint coupling. The electromagnetic clutch assembly includes a driven sleeve and a main shaft that are respectively connected to the ball joint coupling and the output end of the drive motor. The inner side of the driven sleeve is provided with a bearing ring that is sleeved on the outside of the main shaft. Several electromagnets are embedded in the inner wall of the driven sleeve. Several permanent magnet strips are embedded in the surface of the main shaft. The other end of the ball joint coupling is fixedly connected to the bottom surface of the bearing seat.

[0007] In a preferred embodiment, the present invention may be further configured such that: the environmental control system includes a ventilation component for airflow between the inside and outside of the test chamber, an electric heater for controlling the temperature of the environment inside the test chamber, and a temperature and humidity sensor for monitoring the environment inside the test chamber, wherein the output of the temperature and humidity sensor is electrically connected to a controller.

[0008] In a preferred embodiment, the present invention can be further configured such that: the number of the swing sleeves is several and they are evenly distributed in a circumferential direction on the surface of the centrifugal turntable, and the two sides of the swing sleeves are provided with shaft pin lugs that are rotatably sleeved on the inner side of the swing groove.

[0009] In a preferred embodiment, the present invention may be further configured such that: the surface of the sample measuring cylinder is provided with a cap, and the bottom end of the sample measuring cylinder has a conical structure.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the ball joint includes a ball sleeve seat and a ball head that are fixedly connected to the bottom surface of the bearing seat and the surface of the driven rotating sleeve, respectively; the surface of the ball head is provided with a plurality of sliding guide grooves; a plurality of pins are fixedly installed on the inner side of the ball sleeve seat; one end of the pin is slidably sleeved on the inner side of the sliding guide groove.

[0011] In a preferred embodiment, the present invention may be further configured such that: one end of the pin is sleeved with a bearing that slides against the inner side of the guide groove, and the guide groove is arc-shaped.

[0012] The application can be further configured in a preferred example that the number of electromagnets and permanent magnet strips is several and is divided into two groups, the two groups of electromagnets and permanent magnet strips are arranged one by one and distributed in parallel along the arrangement direction of the main shaft rod, and the magnetic poles of the permanent magnet strips are opposite to the surface of the electromagnet.

[0013] The application can be further configured in a preferred example that the end of the electromagnet is electrically connected with a control switch for controlling the intermittent on-off of the electromagnet.

[0014] The application has the following beneficial effects:

[0015] 1. In the application, a new centrifugal test structure is arranged, a coupling driving mechanism is used to drive the centrifugal turntable to rotate at high speed, the swing sleeve and the sample cylinder are tilted by free deflection movement, the deficiency of gravity is compensated by centrifugal force, and the settlement test of the concrete slurry is accelerated, so that the stability of the slurry is reflected according to the height difference between the upper part and the lower part of the slurry, and the test efficiency is significantly improved.

[0016] 2. In the application, the intermittent transmission clutch between the driving motor and the shaft seat is driven by the electromagnetic clutch assembly, the transmission connection is realized by the magnetic force coupling between the electromagnet and the permanent magnet strip, and the transmission is disconnected after the electromagnet is powered off, so that the intermittent clutch of the two is used to realize the variable speed movement of the driven rotating sleeve, the shaft seat and the centrifugal turntable, the centrifugal turntable moves several times, gradient centrifugation is generated, the centrifugal force increases or decreases with time, and the centrifugal force gradient is formed in the centrifugal tube. This centrifugal method can make the separation of substances with different densities clearer and better, thereby improving the centrifugal effect.

[0017] 3. In the application, the sealed test box structure is arranged, the internal environment control system of the test box adjusts the constant temperature and humidity inside the test box, so that the influence of temperature and environmental humidity on the test is avoided, and the test accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the application;

[0019] Figure 2 It is a schematic diagram of the internal structure of a test box of an embodiment of the application;

[0020] Figure 3 It is a schematic diagram of the centrifugal turntable and the coupling driving mechanism structure of an embodiment of the application;

[0021] Figure 4 It is a schematic diagram of the coupling driving mechanism structure of an embodiment of the application;

[0022] Figure 5A schematic view of a swing sleeve and sample cylinder structure of an embodiment of the present application;

[0023] Figure 6 A schematic view of an exploded structure of a ball head coupling of an embodiment of the present application;

[0024] Figure 7 A schematic view of a cross-sectional structure of an electromagnetic clutch assembly of an embodiment of the present application.

[0025] Reference signs:

[0026] 100, test box; 110, sealing cover plate; 120, bracket; 111, control rod;

[0027] 200, centrifugal turntable; 210, swing sleeve; 220, sample cylinder; 230, shaft seat; 201, swing groove; 211, shaft pin ear;

[0028] 300, coupling driving mechanism; 310, driving motor; 320, fixed seat; 330, ball head coupling; 340, electromagnetic clutch assembly; 331, ball sleeve seat; 332, ball head; 333, pin rod; 334, sliding guide groove; 341, driven rotating sleeve; 342, main shaft rod; 343, electromagnet; 344, permanent magnet strip; 345, bearing ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with specific embodiments and with reference to the drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] Some embodiments of the present application provide a detection mechanism for the stability of autoclaved aerated concrete slurry.

[0031] In combination with Figures 1-7 As shown in the drawings, the detection mechanism for the stability of autoclaved aerated concrete slurry provided by the present application comprises a test box 100, a centrifugal turntable 200, a coupling driving mechanism 300, and an environment control system for controlling the temperature and humidity inside the test box 100. The top surface of the test box 100 is provided with a sealing cover plate 110 and a control rod 111 for driving the opening and closing movement of the sealing cover plate 110. The inside of the test box 100 is fixedly installed with a bracket 120. The bottom surface of the centrifugal turntable 200 is provided with a shaft seat 230 rotatably installed on the surface of the bracket 120. The coupling driving mechanism 300 is fixedly installed on the surface of the bracket 120. The surface of the centrifugal turntable 200 is provided with a plurality of swing grooves 201, and the inside of each swing groove 201 is rotatably installed with a swing sleeve 210. The inside of the swing sleeve 210 is detachably sleeved with a sample cylinder 220.

[0032] The coupling driving mechanism 300 comprises a driving motor 310, a fixing seat 320, a ball joint shaft coupling 330 and an electromagnetic clutch assembly 340. The fixing seat 320 is fixed to the surface of the bracket 120 and sleeved to the outside of the ball joint shaft coupling 330. The electromagnetic clutch assembly 340 comprises a driven sleeve 341 and a main shaft 342 connected with the ball joint shaft coupling 330 and the output end of the driving motor 310 respectively. The inside of the driven sleeve 341 is provided with a bearing ring 345 sleeved to the outside of the main shaft 342. A plurality of electromagnets 343 are embeddedly installed on the inner wall of the driven sleeve 341. A plurality of permanent magnet strips 344 are embeddedly installed on the surface of the main shaft 342. The other end of the ball joint shaft coupling 330 is fixedly connected with the bottom surface of the shaft seat 230.

[0033] In the embodiment, the environmental control system comprises a ventilation assembly for testing the air flow circulation inside and outside the test box 100, an electric heater for controlling the temperature of the environment inside the test box 100 and a temperature and humidity sensor for monitoring the environment inside the test box 100. The output end of the temperature and humidity sensor is electrically connected with a controller.

[0034] Specifically, the environmental state inside the test box 100 is sensed in real time by the temperature and humidity sensor. The humidity of the internal environment is reduced by air exchange by the ventilation assembly. The temperature of the internal environment of the test box 100 is controlled by the electric heater in cooperation with the air flow movement, so as to keep the internal environment of the test box 100 stable and avoid the interference of adverse factors on the detection.

[0035] In the embodiment, the number of the swing sleeves 210 is several and they are uniformly distributed in the circumferential direction on the surface of the centrifugal turntable 200. The two sides of the swing sleeve 210 are provided with shaft pin lugs 211 rotatably sleeved to the inside of the swing groove 201.

[0036] Specifically, the swing sleeve 210 can swing freely inside the swing groove 201. In the rotation of the centrifugal turntable 200, the swing sleeve 210 can be inclined along one side of the centrifugal force inside the swing groove 201 under the action of the centrifugal force, so as to improve the centrifugal effect of the concrete slurry by combining the gravity and the centrifugal force.

[0037] In the embodiment, the surface of the sample cylinder 220 is provided with a cover. The bottom end of the sample cylinder 220 is in a conical structure.

[0038] Specifically, the conical sample cylinder 220 can make the sample receive more uniform centrifugal force in the centrifugal process, so as to improve the separation effect.

[0039] In the embodiment, the ball joint shaft coupling 330 comprises a ball sleeve seat 331 and a ball head 332 fixedly connected with the bottom surface of the shaft seat 230 and the surface of the driven sleeve 341 respectively. A plurality of sliding guide grooves 334 are formed in the surface of the ball head 332. A plurality of pin rods 333 are fixedly installed on the inside of the ball sleeve seat 331. One end of the pin rod 333 is slidably sleeved to the inside of the sliding guide groove 334.

[0040] Further, one end of the pin rod 333 is sleeved with a bearing in sliding abutment with the inner side of the sliding guide groove 334, and the sliding guide groove 334 is in an arc shape.

[0041] Specifically, the engagement transmission of the ball sleeve seat 331 and the ball head 332 is used for the transmission connection of the electromagnetic clutch assembly 340 and the shaft seat 230, the inclined arrangement of the driving motor 310 and the electromagnetic clutch assembly 340 can be realized, the rotation efficiency of the motor is improved, the motor is more stable, the energy loss is reduced, the vibration and noise of the motor are reduced, and the motor is more quiet and stable.

[0042] In this embodiment, the number of electromagnets 343 and permanent magnet strips 344 is several and is divided into two groups, the two groups of electromagnets 343 and permanent magnet strips 344 are arranged one by one and are distributed in parallel in a ring shape along the arrangement direction of the main shaft rod 342, and the magnetic poles of the permanent magnet strips 344 are opposite to the surface of the electromagnets 343.

[0043] Further, the end of the electromagnet 343 is electrically connected with a control switch for controlling the intermittent on-off of the electromagnet 343.

[0044] Specifically, the electromagnetic clutch assembly 340 performs intermittent transmission and clutching between the driving motor 310 and the shaft seat 230, the transmission connection is realized through the magnetic force coupling between the electromagnet 343 and the permanent magnet strip 344, and the transmission is disconnected after the electromagnet 343 is powered off, so that the intermittent clutching of the two is realized, the variable speed movement of the driven rotating sleeve 341, the shaft seat 230 and the centrifugal turntable 200 is realized, the movement of the centrifugal turntable 200 generates several accelerations, and gradient centrifugation is generated.

[0045] The working principle and use process of the application are as follows:

[0046] When the autoclaved aerated concrete slurry stability is detected, first, the environmental temperature and humidity in the test box 100 are adjusted and kept constant by the internal environment control system of the test box 100, after the adjustment is completed, the detection can be started, the autoclaved aerated concrete slurry to be detected is sampled and added into each sample cylinder 220, and is sleeved on the inner side of the swing sleeve 210 on the surface of the centrifugal turntable 200, and the centrifugal test is performed, the driving motor 310 drives the centrifugal turntable 200 to rotate under the transmission of the ball head coupling 330 and the electromagnetic clutch assembly 340, and the swing sleeve 210 can swing in the swing groove 201 under the action of the centrifugal force in the rotation of the centrifugal turntable 200, and the swing improves the centrifugal effect of the concrete slurry under the combined action of the gravity and the centrifugal force.

[0047] In the driving of the driving motor 310, the electromagnet 343 is controlled by the control end to be intermittently powered, and the electromagnet 343 is magnetically coupled with the permanent magnet strip 344 during the power-on process, so as to drive the main shaft rod 342 to drive the driven sleeve 341 and the ball head 332 at the end of the driven sleeve 341 to rotate by using the driving motor 310, and after the power-off of the electromagnet 343, the main shaft rod 342 and the driven sleeve 341 cannot be driven, and the driven sleeve 341, the ball head 332 and the centrifugal turntable 200 are affected by the frictional resistance and other forces to spontaneously decelerate, and the speed is lower than the driving speed of the driving motor 310, and after the re-power-on of the electromagnet 343, the electromagnet 343 and the permanent magnet strip 344 are coupled to drive the driven sleeve 341 and the centrifugal turntable 200 to accelerate rotation until the speed of the driven sleeve 341 and the main shaft rod 342 is synchronized, so that the centrifugal turntable 200 continuously decelerates and accelerates under the intermittent power-on of the electromagnet 343, and the centrifugal force with acceleration is also called gradient centrifugal force, and in the centrifugal process, the centrifugal force increases or decreases with time, so that a centrifugal force gradient is formed in the centrifugal tube, and this centrifugal method can make the separation of substances with different densities more clear and the separation effect better.

[0048] After the centrifugation is completed, the height difference between the upper part and the lower part of the slurry in the sample cylinder 220 is measured, and the greater the height difference, the worse the stability of the slurry.

[0049] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An autoclaved aerated concrete slurry stability detection mechanism, characterized by: The utility model provides a test box (100), centrifugal carousel (200), coupling drive mechanism (300) and environmental control system for controlling the temperature and humidity of test box (100) inside, the top of test box (100) is equipped with sealing cover plate (110) and control lever (111) for driving sealing cover plate (110) open and close movement, the inside fixed mounting of test box (100) has bracket (120), the bottom of centrifugal carousel (200) is equipped with shaft seat (230) rotationally installed on the surface of bracket (120), coupling drive mechanism (300) is fixedly installed on the surface of bracket (120), the surface of centrifugal carousel (200) is equipped with a plurality of swing grooves (201) and the inside of swing groove (201) is rotationally installed with swing sleeve (210), the inside of swing sleeve (210) is detachably sleeved with sample cylinder (220), coupling drive mechanism (300) includes drive motor (310), fixed seat (320), ball head coupling (330) and electromagnetic clutch assembly (340), fixed seat (320) is fixed on the surface of bracket (120) and is sleeved on the outside of ball head coupling (330), electromagnetic clutch assembly (340) includes driven sleeve (341) and main shaft (342) connected with ball head coupling (330) and drive motor (310) output end respectively, the inside of driven sleeve (341) is equipped with bearing ring (345) sleeved on the outside of main shaft (342), a plurality of electromagnets (343) are embeddedly installed on the inner wall of driven sleeve (341), the end of electromagnet (343) is electrically connected with control switch for controlling the intermittent on-off of electromagnet (343), a plurality of permanent magnet strips (344) are embeddedly installed on the surface of main shaft (342), the other end of ball head coupling (330) is fixedly connected with the bottom of shaft seat (230).

2. The autoclaved aerated concrete slurry stability detection mechanism according to claim 1, characterized in that: The environmental control system includes a ventilation assembly for the internal and external airflow circulation of the test box (100), an electric heater for controlling the temperature of the internal environment of the test box (100), and a temperature and humidity sensor for monitoring the internal environment of the test box (100). The output end of the temperature and humidity sensor is electrically connected with a controller.

3. The autoclaved aerated concrete slurry stability detection mechanism according to claim 1, characterized in that: The number of swing sleeves (210) is several and evenly distributed in the circumferential direction of the surface of the centrifugal carousel (200). The two sides of the swing sleeve (210) are provided with shaft pin lugs (211) rotationally sleeved on the inside of the swing groove (201).

4. The autoclaved aerated concrete slurry stability detection mechanism according to claim 1, characterized in that: The surface of the sample cylinder (220) is provided with a buckle cover, and the bottom end of the sample cylinder (220) is in a conical structure.

5. The autoclaved aerated concrete slurry stability detection mechanism according to claim 1, characterized in that: The ball head coupling (330) includes a ball sleeve seat (331) and a ball head (332) fixedly connected with the bottom of the shaft seat (230) and the surface of the driven sleeve (341) respectively. A plurality of sliding grooves (334) are formed in the surface of the ball head (332). A plurality of pin rods (333) are fixedly installed on the inside of the ball sleeve seat (331). One end of the pin rod (333) is slidingly sleeved on the inside of the sliding groove (334).

6. The autoclaved aerated concrete slurry stability detection mechanism according to claim 5, characterized in that: One end of the pin rod (333) is sleeved with a bearing which slides against the inner side of a sliding guide groove (334), and the sliding guide groove (334) is in an arc shape.

7. The autoclaved aerated concrete slurry stability detection mechanism according to claim 1, characterized in that: The number of the electromagnets (343) and the permanent magnet strips (344) is several, and the electromagnets (343) and the permanent magnet strips (344) are divided into two groups, and the two groups of electromagnets (343) and permanent magnet strips (344) are arranged one by one and distributed in parallel along the arrangement direction of the main shaft rod (342), and the magnetic poles of the permanent magnet strips (344) face the surfaces of the electromagnets (343).

Images