Calibration device of tea screening machine
The tea sieving machine calibration device, which combines a lifting drive mechanism and a hollow electric rotary table with Hall effect sensors and laser sensors, solves the problems of cumbersome operation and low accuracy of existing tea sieving machine calibration methods, and achieves efficient and accurate calibration results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-24
AI Technical Summary
Existing calibration methods for tea sieving machines are cumbersome to operate, have poor measurement repeatability, and may cause mechanical wear on the equipment. Furthermore, the measurement accuracy is greatly affected by the quality of the vibration sensor.
The machine employs a lifting drive mechanism and a hollow electric rotary table, using Hall effect sensors and laser sensors to measure the rotation speed and movement amplitude of the tea sieving machine in a non-contact manner, and achieves calibration through automated control.
It achieves efficient and accurate calibration of the tea sieving machine, is easy to operate, has high measurement accuracy and good repeatability, and will not cause wear and tear on the equipment.
Smart Images
Figure CN224034943U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of measurement and test technology, concretely relates to a tea leaf screening machine calibration device. BACKGROUND
[0002] The tea leaf screening machine is a kind of mechanical equipment specially used for grading, screening and removing impurities of tea leaf.It plays a key role in the tea leaf processing process, and can classify according to the size, shape or weight of different tea leaves, so as to improve the uniformity of tea quality and commodity value.The tea leaf screening machine is the key equipment for determining the content of powder and broken tea in tea by screening method.The national standard GB / T 8311-2013 "Determination of tea powder and broken tea content" specifies the technical parameters of tea leaf screening machine, including speed and swing amplitude.
[0003] In order to ensure the accuracy and reliability of the tea leaf screening machine, the speed and swing amplitude technical indicators of the tea leaf screening machine need to be calibrated.However, the existing calibration device and method have the following shortcomings:1) circle drawing method.According to the movement track of the screen or vibrating component of the tea leaf screening machine, a corresponding circle is drawn on the paperboard with a marker pen, so as to calculate the diameter or amplitude of the circular motion formed in the working process.Although this method has low implementation cost, it is complicated to operate, requires high skill of the tester, and has poor measurement repeatability.2) A vibration sensor is installed at the edge of the screen of the tea leaf screening machine, and the vibration waveform of the tea leaf screening machine in the working process is collected in real time by the vibration sensor.This measurement method is a contact type measurement, which not only causes mechanical wear to the equipment, but also greatly affects the measurement accuracy of the vibration sensor itself. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a tea leaf screening machine calibration device, which can calibrate the technical indicators of the tea leaf screening machine by non-contact method, and has accurate measurement, convenient and efficient operation and good repeatability.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a tea leaf screening machine calibration device, which comprises a rack, a lifting driving mechanism, a hollow electric rotating table, a sensor fixing tool, a speed sensor and a displacement sensor.The lifting driving mechanism is installed on the rack, and the lifting driving mechanism drives the sliding block to move up and down through the first motor.The hollow electric rotating table is fixedly connected with the sliding block on the lifting driving mechanism, so as to move up and down with the sliding block.The hollow electric rotating table rotates the annular turntable through the second motor.The sensor fixing tool is fixedly connected with the annular turntable on the hollow electric rotating table, so as to rotate with the annular turntable.The speed sensor and the displacement sensor are installed on the sensor fixing tool, so as to obtain the speed and movement amplitude data of the tea leaf screening machine.
[0006] Further, the frame comprises a base on which the tea screening machine is placed and a vertical frame, an upper portion of the vertical frame being provided with a motor mounting plate; the lifting driving mechanism comprises a first motor, a screw rod, a sliding block and a guide rail, the first motor being fixedly mounted on the motor mounting plate and having an output shaft fixedly connected with the vertically arranged screw rod downward to drive the screw rod to rotate, the guide rail being fixedly connected with the vertical frame, and the sliding block being in screwing cooperation with the screw rod and sliding cooperation with the guide rail to convert the rotating movement of the screw rod into the up-down linear movement of the sliding block.
[0007] Further, the lifting driving mechanism further comprises a coupling and two bearing seats, the output shaft of the first motor being fixedly connected with the upper end of the screw rod through the coupling, and the upper and lower portions of the screw rod being rotatably connected with the vertical frame through the bearing seats.
[0008] Further, the lifting driving mechanism comprises two guide rails arranged on the vertical frames on the left and right sides of the screw rod, the sliding block comprises a T-shaped connecting block, a screwing cooperation piece and two sliding cooperation pieces, the T-shaped connecting block comprises a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are connected into one body, a through hole is formed in the middle portion of the horizontal plate, a second motor inserting hole is formed in the front side of the horizontal plate, the screwing cooperation piece is fixedly connected with the middle portion of the rear side of the vertical plate and is in screwing cooperation with the screw rod, and the two sliding cooperation pieces are fixedly connected with the left and right sides of the rear side of the vertical plate and are in sliding cooperation with the guide rails.
[0009] Further, the hollow electric rotating table comprises a second motor, a hollow mounting frame and an annular turntable, the hollow mounting frame being fixedly connected with the lower portion of the sliding block, and the second motor being fixedly mounted on the hollow mounting frame and having an output shaft driving the annular turntable to rotate through an intermediate transmission mechanism.
[0010] Further, the sensor fixing tool is an annular sensor fixing tool, the annular sensor fixing tool is coaxially arranged with the annular turntable and is fixedly connected with the lower portion of the annular turntable.
[0011] Further, two displacement sensors are arranged horizontally and form a 90° included angle, the working ends of the two displacement sensors are both directed toward the vibrating and rotating component of the tea screening machine to simultaneously detect the movement amplitudes of the tea screening machine in two directions perpendicular to each other, and the working end of the rotating speed sensor is directed toward the rotating output component or the vibrating and rotating component of the tea screening machine to detect the rotating speed of the tea screening machine.
[0012] Further, the rotating speed sensor is a Hall sensor, an eddy current sensor, a magnetoresistance sensor or a proximity switch sensor.
[0013] Further, the displacement sensor is a laser sensor.
[0014] Compared with the prior art, the tea screening machine calibration device has the following beneficial effects: the device does not need complicated manual operation, through the cooperation of the lifting driving mechanism and the hollow electric rotating table, the rotating speed sensor and the displacement sensor can be directed to the rotating output component or the vibrating rotating component of the tea screening machine in the set detection direction, so that the synchronous non-contact measurement of the rotating speed and the movement amplitude of the tea screening machine is realized in the working process of the tea screening machine, and then the calibration of the tea screening machine is realized. The device has high automation, will not cause abrasion to the equipment, is convenient and efficient to operate, has high measurement precision, good measurement repeatability, has strong practicability and broad application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a structure schematic of the tea screening machine calibration device of the embodiment of the utility model; Figure 1 ;
[0016] Figure 2 is a structure schematic of the tea screening machine calibration device of the embodiment of the utility model; Figure 2 ;
[0017] Figure 3 is a structure schematic of the tea screening machine calibration device of the embodiment of the utility model; Figure 3 (remove the base);
[0018] Figure 4 is a structure schematic of the T-shaped connecting block in the embodiment of the utility model;
[0019] Figure 5 is a structure schematic of the hollow electric rotating table in the embodiment of the utility model;
[0020] Figure 6 is a control principle diagram of the control device in the embodiment of the utility model. DETAILED DESCRIPTION
[0021] The utility model will be further described below in combination with the drawings and embodiments.
[0022] It should be pointed out that the following detailed description is exemplary and aims at providing further description of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs.
[0023] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0024] As shown in Figures 1-3 The embodiment provides a tea screening machine calibration device, which comprises a rack 1, a lifting driving mechanism, a hollow electric rotating table, a sensor fixing tool 2, a rotating speed sensor 3 and a displacement sensor 4. The lifting driving mechanism is installed on the rack 1. The lifting driving mechanism drives a sliding block 6 to move up and down through a first motor 5. The hollow electric rotating table is fixedly connected with the sliding block 6 on the lifting driving mechanism to move up and down with the sliding block 6. The hollow electric rotating table drives a ring-shaped rotating disc 8 to rotate through a second motor 7. The sensor fixing tool 2 is fixedly connected with the ring-shaped rotating disc 8 on the hollow electric rotating table to rotate with the ring-shaped rotating disc 8. The rotating speed sensor 3 and the displacement sensor 4 are installed on the sensor fixing tool 2 to obtain rotating speed and movement amplitude data of the tea screening machine.
[0025] In the embodiment, the rack 1 comprises a base 101 and a vertical frame 102. The base 101 is used to place the tea screening machine. The vertical frame 102 is provided with a motor mounting plate 103 at the upper portion. The lifting driving mechanism comprises the first motor 5, a lead screw 9, the sliding block 6, a guide rail 10, a shaft coupling 11 and two bearing seats 12. The first motor 5 is fixedly installed on the motor mounting plate 103. The output shaft of the first motor 5 is fixedly connected with the upper end of the vertically arranged lead screw 9 through the shaft coupling 11 to drive the lead screw 9 to rotate. The guide rail 10 is fixedly connected to the vertical frame 102. The sliding block 6 is screw-connected with the lead screw 9 and slidingly connected with the guide rail 10 to convert the rotating movement of the lead screw 9 into the up-and-down linear movement of the sliding block 6. The two bearing seats 12 are fixedly installed on the upper and lower portions of the vertical frame 102. The lead screw 9 is rotatably connected with the vertical frame 102 through the bearing seats 12.
[0026] Preferably, the lifting driving mechanism comprises two guide rails 10 arranged on the vertical frame on the left and right sides of the lead screw 9. The sliding block 6 comprises a T-shaped connecting block 601, a screwing part 602 and two sliding parts 603. Figure 4As shown, the T-shaped connecting block 601 includes a vertical plate and a horizontal plate, which are connected as a whole, and a circular hole is formed in the middle of the horizontal plate to avoid contacting the sieve plate or other vibrating components of the tea screening machine during testing; threaded holes are formed on the four corners of the circular hole for fixing the hollow electric rotating table; a second motor insertion hole is formed on the front side of the horizontal plate. The screw fitting part 602 is fixedly connected to the middle of the rear side of the vertical plate and is screw fitted with the lead screw 9, and the two sliding fitting parts 603 are fixedly connected to the left and right sides of the rear side of the vertical plate and are slidingly fitted with the guide rail 10.
[0027] In this embodiment, as shown in Figure 5 The hollow electric rotating table includes a second motor 7, a hollow mounting frame 13, and a ring-shaped turntable 8, the hollow mounting frame 13 is fixedly connected to the lower part of the sliding block 6, the second motor 7 is fixedly installed on the hollow mounting frame 13 and its output shaft drives the ring-shaped turntable 8 to rotate through an intermediate transmission mechanism. The hollow electric rotating table is connected to the T-shaped connecting block 601 through four bolts.
[0028] In this embodiment, the sensor fixing tool 2 is a ring-shaped sensor fixing tool, which is coaxially arranged with the ring-shaped turntable 8 and is fixedly connected to the threaded holes in the lower part of the ring-shaped turntable 8 through bolts. A plurality of threaded holes are formed in the ring-shaped sensor fixing tool to fix and install the Hall rotation speed sensor 3 and the laser displacement sensor 4 on the sensor fixing tool 2 through threaded fasteners.
[0029] The working end of the rotation speed sensor 3 faces the rotating output component or the vibrating rotating component of the tea screening machine to detect the rotation speed of the tea screening machine. The rotation speed sensor 3 can be a Hall sensor, an eddy current sensor, a magnetoresistive sensor, or a proximity switch sensor, etc. The rotating output component is the rotating main shaft of the tea screening machine, and the vibrating rotating component can be an eccentric block, a tray, a support rod, a turntable, or a sieve plate of the tea screening machine. In this embodiment, the rotation speed sensor 3 is a Hall sensor.
[0030] When the rotation speed sensor adopts the Hall sensor, the Hall sensor has a working distance limit (0.5-4mm), so it is better to take the rotating main shaft or eccentric block as the detection target to make the Hall sensor close to the detection target. If the tray, sieve disc and other components can be disassembled, the related components can be disassembled and the Hall sensor is close to the rotating main shaft or eccentric block; if the components cannot be disassembled, there is a certain space between the workbench of the tea screening machine and the tray, so that the Hall sensor can face the rotating main shaft or eccentric block therebetween. In the embodiment, the Hall rotation speed sensor 3 comprises a Hall sensor main body and a Hall sensor fixing support. The Hall sensor main body is a Hall sensor with a light axis cylindrical structure, which is installed in the Hall sensor fixing support and can move and fix forward and backward to adjust the position of the Hall sensor from the rotating main shaft or eccentric block. The Hall sensor fixing support is sleeved outside the sensor. After adjusting the position of the Hall rotation speed sensor, the Hall sensor fixing support is fixedly connected to the annular sensor fixing tool through a threaded fastener. It should be noted that when the rotation speed sensor adopts the Hall sensor, a small magnet needs to be attached to the rotating main shaft or eccentric block to cooperate with the Hall sensor to detect the change of the magnetic field.
[0031] If the rotation speed sensor adopts the proximity switch sensor, the limit on the working distance is smaller, and the detection target of the sensor can be not only the rotating main shaft, eccentric block, but also the tray, support rod, rotating disc or sieve disc and other components.
[0032] In the embodiment, the displacement sensor 4 is a laser sensor. The tea screening machine calibration device comprises two displacement sensors 4, which are arranged horizontally and form a 90° angle, and the working ends of the two displacement sensors 4 are directed towards the vibrating rotating components of the tea screening machine, so that two beams of laser emitted by the two laser displacement sensors 4 are irradiated on the vibrating rotating components at a 90° angle to simultaneously detect the movement amplitudes of the tea screening machine in two mutually perpendicular directions. The vibrating rotating components can be the eccentric block, tray, support rod, rotating disc or sieve disc of the tea screening machine. The laser sensor can take the eccentric block as the detection target, or take the tray, support rod, rotating disc or sieve disc driven by the eccentric block to vibrate and rotate as the detection target, and the movement amplitude of the tea screening machine can be detected.
[0033] In order to realize the automatic control of the device, as shown in Figure 6 The tea screening machine calibration device further comprises a control device, which is electrically connected with the first motor 5, the second motor 7, the Hall rotation speed sensor 3 and the laser displacement sensor 4 to control the working of the first motor and the second motor and obtain the rotation speed and movement amplitude data of the tea screening machine.
[0034] The working process of the tea screening machine calibration device is as follows: first, the tea screening machine is placed on the rack 1 and located at the center of the hollow position in the tea screening machine calibration device. Then, the lifting drive mechanism is controlled to work, the hollow electric rotating table and the sensor fixing tool 2 are driven downward by the first motor 5 and the sliding block 6, until the hollow electric rotating table and the sensor fixing tool 2 are lowered to a set distance from the workbench surface of the tea screening machine and located at the periphery of the revolving part thereof, at this time, the Hall rotation speed sensor 3 and the laser displacement sensor 4 are aligned with the revolving part of the tea screening machine. The current detection direction is determined, the hollow electric rotating table is controlled to work, the ring-shaped turntable 8 and the sensor fixing tool 2 are rotated by the second motor 7, so that the laser displacement sensor 4 is at a set horizontal angle. Then, the tea screening machine is started, and after a set working time, the tea screening machine is turned off; in this process, the rotation speed of the tea screening machine is detected by the Hall rotation speed sensor 3, and the movement amplitude of the current detection direction of the tea screening machine is detected by the laser displacement sensor 4. The detection direction is changed, and the above process is repeated until the movement amplitudes of all detection directions of the tea screening machine are detected. Finally, all the measured data are processed to obtain the rotation speed and the revolving amplitude data of the tea screening machine, and then the calibration data of the tea screening machine are calculated.
[0035] It should be noted that two laser displacement sensors 4 are arranged at an angle of 90° in the embodiment, so that the movement amplitude data of two perpendicular directions can be detected simultaneously in one detection process, thereby the detection times can be doubled reduced, and the measurement efficiency is further improved.
[0036] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical solution of the present application, and according to the technical essence of the present application, still belong to the protection scope of the present application.
Claims
1. A tea leaf screener calibration device, characterized by, The machine frame, the lifting driving mechanism, the hollow electric rotary table, the sensor fixing tool, the rotating speed sensor and the displacement sensor, the lifting driving mechanism is installed on the machine frame, the lifting driving mechanism drives the slider to move up and down through the first motor, the hollow electric rotary table is fixedly connected with the slider on the lifting driving mechanism to move up and down with the slider, the hollow electric rotary table drives the annular turntable to rotate through the second motor, the sensor fixing tool is fixedly connected with the annular turntable on the hollow electric rotary table to rotate with the annular turntable, the rotating speed sensor and the displacement sensor are installed on the sensor fixing tool to obtain the rotating speed and the movement amplitude data of the tea screening machine.
2. A tea sieving machine calibration device according to claim 1, characterised in that, The machine frame includes a base and a vertical frame, the base is placed on the tea screening machine, and the upper part of the vertical frame is provided with a motor mounting plate; the lifting driving mechanism includes a first motor, a screw rod, a slider and a guide rail, the first motor is fixedly installed on the motor mounting plate, and the output shaft thereof is fixedly connected with the vertically arranged screw rod downward to drive the screw rod to rotate, the guide rail is vertically fixedly connected to the vertical frame, and the slider is screwedly connected with the screw rod and slidably connected with the guide rail to convert the rotating movement of the screw rod into the linear up-down movement of the slider.
3. A tea sieving machine calibration device according to claim 2, characterised in that, The lifting driving mechanism further includes a shaft coupling and two bearing seats, the output shaft of the first motor is fixedly connected with the upper end of the screw rod through the shaft coupling; the two bearing seats are fixedly installed on the upper and lower parts of the vertical frame, and the upper and lower parts of the screw rod are rotatably connected with the vertical frame through the bearing seats.
4. The tea screening machine calibration device of claim 2, wherein, The lifting driving mechanism includes two guide rails, which are arranged on the vertical frames on the left and right sides of the screw rod; the slider includes a T-shaped connecting block, a screwing part and two sliding parts; the T-shaped connecting block includes a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are connected in one piece, a through hole is formed in the middle of the horizontal plate, and a second motor insertion hole is formed in the front side of the horizontal plate; the screwing part is fixedly connected with the middle of the rear side of the vertical plate and screwedly connected with the screw rod, and the two sliding parts are fixedly connected with the left and right sides of the rear side of the vertical plate and slidably connected with the guide rails.
5. The tea screening machine calibration device of claim 1, wherein, The hollow electric rotary table includes a second motor, a hollow mounting frame and an annular turntable, the hollow mounting frame is fixedly connected to the lower part of the slider, and the second motor is fixedly installed on the hollow mounting frame and drives the annular turntable to rotate through an intermediate transmission mechanism.
6. The tea screening machine calibration device of claim 1, wherein, The sensor fixing tool is an annular sensor fixing tool, which is coaxially arranged with the annular turntable and fixedly connected to the lower part of the annular turntable.
7. The tea screening machine calibration device of claim 1, wherein, Two displacement sensors are arranged horizontally and form a 90° angle, the working ends of the two displacement sensors are both directed to the vibrating and rotating components of the tea screening machine to simultaneously detect the movement amplitudes of the tea screening machine in two directions perpendicular to each other; the working end of the rotating speed sensor is directed to the rotating output component or the vibrating and rotating component of the tea screening machine to detect the rotating speed of the tea screening machine.
8. The tea screening machine calibration device of claim 1, wherein, The rotating speed sensor is a Hall sensor, an eddy current sensor, a magnetoresistance sensor or a proximity switch sensor.
9. The tea screening machine calibration device of claim 1, wherein, The displacement sensor is a laser sensor.
10. The tea screening machine calibration device of claim 1, wherein, The control device is electrically connected with the first motor, the second motor, the rotating speed sensor and the displacement sensor respectively, so as to control the first motor and the second motor to work and acquire the rotating speed and the movement amplitude data of the tea leaf screening machine.