Automatic weighing device

Abstract

The present application discloses an automatic weighing device, including a frame, a sample bin, an automatic feeding mechanism, a sampling platform, a weighing sensor and a sampling barrel. The frame includes a support arm and a base; the sample bin is fixedly connected to the support arm, and the sample bin is provided with a containing chamber and a discharge port connected to the containing chamber; the automatic feeding mechanism includes a spiral feeding piece; the sampling platform is arranged on the base, the weighing sensor and the sampling platform are fixedly connected, and the sampling barrel is placed on the sampling platform. In the present application, the tobacco in the containing chamber is sent out from the discharge port and falls into the sampling barrel through the rotation of the spiral feeding piece, thereby changing the cumbersome manual intake of tobacco in the traditional method and making the operation simple; through the weighing sensor, the weight of tobacco in the sampling barrel is obtained in real time, so that the weight of the taken tobacco can be accurately controlled, so that the weight of each sampling is the same, and the reliability of the data in the subsequent tobacco testing process is ensured.

Description

Technical Field

[0001] The present application relates to the field of weighing, and in particular to an automatic weighing device. Background Art

[0002] At present, when evaluating the physical quality of tobacco, the main evaluation indicators include physical indicators such as moisture content, filling value and structure. By evaluating the above physical indicators, the production quality can be well controlled. However, in the actual production process, it is found that even if the above physical indicators of different batches of tobacco are roughly the same, there are differences in the downtime rate and the amount of short ends removed during the rolling process. That is, among multiple batches of tobacco with roughly the same above indicators, some batches have a low downtime rate and a small amount of short ends removed during the rolling process of tobacco, so the production yield rate is higher; some batches of tobacco have a high downtime rate and a large amount of short ends removed during the rolling process, so the production yield rate is lower.

[0003] After research, it was found that the reason for the difference in downtime rate and the difference in the amount of short-term removal of different batches of tobacco is that different batches of tobacco have different characteristics such as elasticity, support strength and softness. Therefore, in order to improve the production yield rate, it is necessary to evaluate not only the above-mentioned material indicators, but also its elasticity, support strength and softness and other characteristics.

[0004] In order to detect the characteristics of tobacco, the patent application document with application number 2019204854771 records a device for measuring the elasticity of tobacco, the patent application document with application number 2019102981442 records a tobacco support strength detection method and a tobacco support strength detector, and the patent application document with application number 2019102981438 records a tobacco softness detection method and a tobacco softness detector. The above-mentioned devices and methods for detecting tobacco characteristics all use the control variable method, and the average value is obtained through multiple tests. In this process, it is necessary to ensure that the quality of tobacco in the measuring tube is the same.

[0005] However, in the prior art, in the process of testing tobacco, tobacco sampling and weighing are all carried out by manually adding tobacco. In the process of manual sampling, since the staff adds samples based on their feelings each time when taking and placing samples, the weight added each time is random, so multiple taking and placing are required, which leads to low efficiency, and large errors are inevitable in the repeated weighing process. Summary of the invention

[0006] The purpose of the present application is to provide an automatic weighing device, which can automatically add tobacco when weighing tobacco, thereby not only improving work efficiency but also ensuring accuracy.

[0007] The automatic weighing device provided in the present application includes a frame, a sample bin, an automatic feeding mechanism, a sampling platform, a weighing sensor and a sampling bucket; the frame includes a fixedly connected support arm and a base; the sample bin is fixedly connected to the support arm, and the sample bin is provided with a accommodating chamber and a discharge port connected to the accommodating chamber; the automatic feeding mechanism includes a spiral feeding piece, which is arranged in the accommodating chamber and can rotate in the accommodating chamber; the sampling platform is arranged on the base, the weighing sensor and the sampling platform are fixedly connected, and the sampling bucket is placed on the sampling platform, and the opening of the sampling barrel faces the discharge port.

[0008] Optionally, the sample bin is provided with a feeding port, and the feeding port and the unloading port are located at two opposite ends of the sample bin.

[0009] Optionally, the automatic feeding mechanism also includes a fixed cover, a connecting rod and a first driving component; the fixed cover is detachably covered on the feeding port, and the first driving component is fixedly connected to the side of the fixed cover facing the sample chamber; one end of the connecting rod is fixedly connected to the output end of the first driving component, and the other end of the connecting rod extends into the accommodating chamber, and the spiral feeding sheet is fixedly wound on the connecting rod.

[0010] Optionally, the connection between the accommodating chamber and the discharge port is funnel-shaped.

[0011] Optionally, a switch is also included, which is fixedly arranged at the discharge port and controls the opening or closing of the discharge port.

[0012] Optionally, the switch is a solenoid valve.

[0013] Optionally, the sampling platform is slidably connected to the base; the automatic weighing device also includes a second driving component, the second driving component is fixedly connected to the support arm, and the output end of the second driving component is fixedly connected to the sampling platform.

[0014] Optionally, it also includes a recovery bucket and a recovery table, the recovery table is slidably connected to the base, the recovery bucket is placed on the recovery table, and the output end of the second driving component is also fixedly connected to the recovery table; while the second driving component drives the sampling table away from the discharge port, it also drives the recovery table to move so that the opening of the recovery bucket faces the discharge port.

[0015] Optionally, a slide groove is provided on the base, and slide rails are provided under the sampling table and the recovery table, and the sampling table and the recovery table slide in the slide groove through their own slide rails respectively.

[0016] Optionally, the support arm includes a support, a first arm and a second arm, the support is vertically fixedly connected to the base, the first arm and the second arm are vertically fixedly connected to the support, and the first arm and the second arm are parallel to the base; the first arm and the second arm are provided with fixing holes at one end away from the support, and the sample chamber is fixedly clamped in the fixing hole.

[0017] The automatic weighing device provided in the present application includes a frame, a sample bin, an automatic feeding mechanism, a sampling platform, a weighing sensor and a sampling barrel. Among them, the frame includes a fixedly connected support arm and a base; the sample bin is fixedly connected to the support arm, and the sample bin is provided with a containing chamber and a discharge port connected to the containing chamber; the automatic feeding mechanism includes a spiral feeding piece, which is arranged in the containing chamber and can rotate in the containing chamber; the sampling platform is arranged on the base, the weighing sensor and the sampling platform are fixedly connected, and the sampling barrel is placed on the sampling platform, and the opening of the sampling barrel faces the discharge port. In the present application, the tobacco in the containing chamber is sent out from the discharge port by the rotation of the spiral feeding piece, and is collected by the sampling barrel arranged below the discharge port, thereby changing the cumbersomeness of manual intake of tobacco in the traditional way and making the operation simple. Furthermore, a weighing sensor is provided under the sampling barrel, which can obtain the weight of the tobacco in the sampling barrel in real time. When the required weight is reached, the rotation of the spiral feed piece is stopped, and the delivery of the tobacco can be stopped. The weight of the ingested tobacco can be accurately controlled, so that the weight of each sample is the same, thereby ensuring the reliability of the data during the subsequent tobacco testing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an automatic weighing device provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a portion of the structure of an automatic feeding mechanism in an automatic weighing device provided in an embodiment of the present application;

[0020] Figure 3 A control schematic diagram of the automatic weighing device provided in an embodiment of the present application.

[0021] Description of Reference Numerals

[0022] 100-frame, 110-support arm, 111-support, 112-first arm, 113-second arm, 114-fixing hole, 120-base, 121-slide, 200-sample chamber, 300-automatic feeding mechanism, 310-spiral feeding sheet, 320-fixing cover, 330-connecting rod, 340-first driving component, 341-reducer, 400-sampling table, 500-sampling bucket, 600-switch, 700-second driving component, 800-recovery bucket, 810-recovery table, 900-operation panel, 1000-weighing sensor, 1100-central processing unit. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0024] like Figure 1 and Figure 2 As shown, the automatic weighing device provided in the embodiment of the present application includes a frame 100 , a sample chamber 200 , an automatic feeding mechanism 300 , a sampling table 400 , a weighing sensor and a sampling bucket 500 .

[0025] Among them, the frame 100 includes a support arm 110 and a base 120 that are fixedly connected; the sample chamber 200 is fixedly connected to the support arm 110, and the sample chamber 200 is provided with a accommodating chamber and a discharge port connected to the accommodating chamber; the automatic feeding mechanism 300 includes a spiral feeding piece 310, and the spiral feeding piece 310 is arranged in the accommodating chamber and can rotate in the accommodating chamber; the sampling table 400 is arranged on the base 120, the weighing sensor and the sampling table 400 are fixedly connected, and the sampling bucket 500 is placed on the sampling table 400, and the opening of the sampling bucket 500 faces the discharge port.

[0026] It can be understood by those skilled in the art that, in this embodiment, in order to ensure the accuracy of each sampling, the difference method can be used to weigh the weight of the tobacco in the sampling barrel 500. Specifically, the weight of the sampling barrel 500 is weighed before sampling, and the weight of the sampling barrel 500 is weighed in real time during the sampling process, and the difference between the two is the weight of the tobacco in the sampling barrel 500.

[0027] In the embodiment of the present application, the spiral feed sheet 310 is rotated to drive the tobacco in the accommodating chamber to move along the spiral direction of the spiral feed sheet 310 toward the discharge port, so as to deliver the tobacco in the accommodating chamber from the discharge port. Since the sampling barrel 500 is located below the discharge port, and the opening of the sampling barrel 500 faces the discharge port, the tobacco delivered from the discharge port will automatically fall into the sampling barrel 500, thereby changing the cumbersome manual intake of tobacco in the traditional way and making the operation simple. Furthermore, a weighing sensor is also provided below the sampling barrel 500, which can obtain the weight of the tobacco in the sampling barrel 500 in real time. When the required weight is reached, the rotation of the spiral feed sheet 310 is stopped, and the delivery of the tobacco can be stopped, so that the weight of the ingested tobacco can be accurately controlled, so that the weight of each sampling is the same, and the reliability of the data in the subsequent tobacco testing process is ensured.

[0028] In an optional embodiment, the sample bin 200 is provided with a feeding port, and the feeding port and the discharge port are located at opposite ends of the sample bin 200. In this embodiment, tobacco is added to the sample bin 200 through an independently provided feeding port, making the process of adding tobacco simple and convenient. At the same time, in this embodiment, the feeding port and the discharge port are arranged opposite to each other, which can make the flow of tobacco smoother.

[0029] In an optional embodiment, the automatic feeding mechanism 300 also includes a fixed cover 320, a connecting rod 330 and a first driving component 340; the fixed cover 320 is detachably covered on the feeding port, and the first driving component 340 is fixedly connected to the side of the fixed cover 320 facing the sample chamber 200; one end of the connecting rod 330 is fixedly connected to the output end of the first driving component 340, and the other end of the connecting rod 330 extends into the accommodating chamber, and the spiral feeding sheet 310 is fixedly wound around the connecting rod 330.

[0030] In this embodiment, an external thread is provided on the fixed cover 320, and an internal thread is provided at the feeding port of the sampling barrel 500. Through the cooperation of the threads, the fixed cover 320 can be detachably covered on the feeding port. Of course, in this embodiment, other methods can also be used to achieve the detachable covering of the fixed cover 320 on the feeding port, such as interference fit. In this embodiment, the fixed cover 320 and the sample bin 200 are detachably connected, so that the first driving component 340, the connecting rod 330 and the spiral feeding piece 310 can be conveniently taken out from the accommodating chamber, so as to facilitate the rapid addition of the sampled tobacco into the accommodating chamber of the sample bin 200, and at the same time, the maintenance of the first driving component 340, the connecting rod 330 and the spiral feeding piece 310 can be conveniently performed.

[0031] In this embodiment, the first driving component 340 is specifically a driving motor, and the output shaft of the driving motor is fixedly connected to one end of the connecting rod 330 through a reducer 341. The driving motor is fixedly arranged on the side of the fixed cover 320 facing the sample bin 200, and the automatic weighing device may further include a reducer 341. The output shaft of the driving motor is connected to the input end of the reducer 341, and the output end of the reducer 341 is fixedly connected to one end of the connecting rod 330. Under the action of the driving motor and the reducer 341, the connecting rod 330 rotates with the spiral feed sheet 310, thereby sending the tobacco shreds out from the feeding port. The reducer 341 reduces the speed and increases the torque of the power output by the driving motor so that the power can smoothly drive the spiral feed sheet 310 to rotate.

[0032] In an optional embodiment, the connection between the accommodating chamber and the discharge port is funnel-shaped. That is, the lower end of the accommodating chamber is funnel-shaped. In this embodiment, in the funnel-shaped space, the diameters of the connecting rod 330 and the spiral feed sheet 310 are correspondingly reduced to adapt to the funnel-shaped connection. By setting the lower end of the accommodating chamber to be funnel-shaped, it can guide the tobacco, so that the tobacco can flow out of the discharge port smoothly and will not be retained in the sample bin 200, ensuring that there will be no difficulty in discharging due to the accumulation of tobacco in the sample bin 200. At the same time, the funnel shape can design the discharge port to be smaller, so as to accurately control the amount of tobacco flowing out of the discharge port, further ensuring the accuracy of the tobacco sampling weight, so as to ensure the reliability of the detection data.

[0033] In an optional embodiment, the automatic weighing device further includes a switch 600, which is fixedly arranged at the discharge port, and the switch 600 controls the opening or closing of the discharge port. In this embodiment, when the weight of the shredded tobacco in the sampling barrel 500 reaches a set weight, the discharge port can be closed by the switch 600, so that the shredded tobacco in the sample bin 200 will not continue to flow out of the discharge port, thereby further ensuring the accuracy of sampling.

[0034] Specifically, the switch 600 is a solenoid valve. Those skilled in the art will appreciate that other forms of switches 600 may also be used here, but in this embodiment, a solenoid valve is selected, which has a simple structure and is easy to control.

[0035] In an optional embodiment, the sampling platform 400 is slidably connected to the base 120; the automatic weighing device further comprises a second driving component 700, the second driving component 700 is fixedly connected to the support arm 110, and the output end of the second driving component 700 is fixedly connected to the sampling platform 400. It can be understood by those skilled in the art that the second driving component 700 can be a hydraulic cylinder or a pneumatic cylinder, and is preferably a pneumatic cylinder in this embodiment.

[0036] In this embodiment, when the weight reaches the set weight, the sampling barrel 500 quickly leaves the bottom of the discharge port under the action of the second driving component 700, thereby preventing a small amount of tobacco from falling into the sampling barrel 500 during the closing process of the switch 600, thereby further increasing the weighing accuracy of the tobacco and increasing the reliability of the tobacco characteristic detection data.

[0037] Those skilled in the art can understand that, in this embodiment, in order to prevent the sampling barrel 500 from falling from the sampling platform 400 due to inertia when the second driving component 700 drives the sampling platform 400 away from the discharge port, the sampling barrel 500 is detachably fixed on the sampling platform 400. For example, the sampling barrel 500 can be detachably placed on the sampling platform 400 by means of threaded connection or interference fit. In this embodiment, it is preferably detachably placed in the sampling platform 400 by means of interference fit.

[0038] Specifically, a blind hole is provided at the bottom of the sampling barrel 500, and a protrusion is fixedly provided at the upper end of the sampling platform 400. When the sampling barrel 500 is placed on the sampling platform 400, the blind hole and the protrusion are interference-fitted, so that the sampling barrel 500 is fixed on the sampling platform 400. In this way, the risk of the sampling barrel 500 falling off the sampling platform 400 when it moves with the sampling platform 400 is avoided. At the same time, since the protrusion provided on the sampling platform 400 can also position the sampling barrel 500, it can be ensured that the sampling barrel 500 is located directly below the discharge port each time it is placed, ensuring that the tobacco can accurately fall into the sampling barrel 500. Those skilled in the art can also understand that in order to facilitate the placement and removal of the sampling platform 400, in this embodiment, the protrusion provided on the sampling platform 400 can be made of elastic material or a layer of elastic material, such as rubber, is coated on the outer surface of the protrusion. Thereby, the wear on the sampling barrel 500 during the process of taking out and placing the sampling barrel 500 can be reduced, the sampling barrel 500 can be protected, and the service life of the sampling barrel 500 can be increased.

[0039] In an optional embodiment, the automatic weighing device further includes a recovery barrel 800 and a recovery platform 810, the recovery platform 810 is slidably connected to the base 120, the recovery barrel 800 is placed on the recovery platform 810, and the output end of the second driving component 700 is also fixedly connected to the recovery platform 810; the second driving component 700 drives the sampling platform 400 away from the feeding port, and also drives the recovery platform 810 to move so that the opening of the recovery barrel 800 faces the feeding port. In the process of closing the switch 600, it is inevitable that some tobacco will flow out of the feeding port. In order to avoid waste and improve the utilization rate of tobacco, a recovery barrel 800 is also provided in this embodiment. When the sampling barrel 500 leaves the feeding port under the drive of the second driving component 700, it drives the recovery barrel 800 to move below the feeding port to collect the tobacco flowing out of the feeding port during the closing process of the switch 600. Those skilled in the art can understand that, in the present embodiment, the recovery bucket 800 can be detachably placed on the recovery table 810 . The specific method can refer to the connection method between the sampling bucket 500 and the sampling table 400 , which will not be elaborated here.

[0040] In an optional embodiment, a slide groove 121 is provided on the base 120, and slide rails are provided below the sampling platform 400 and the recovery platform 810, and the sampling platform 400 and the recovery platform 810 slide in the slide groove 121 through their respective slide rails. In this embodiment, by providing the slide groove 121 and the slide rail, the movement of the sampling platform 400 and the recovery platform 810 can be guided, so that the sampling platform 400 and the recovery platform 810 can run more smoothly, thereby ensuring that the tobacco in the sampling platform 400 will not fall during the movement, further ensuring the accuracy of sampling, and ensuring the reliability of tobacco detection data.

[0041] In an optional embodiment, the support arm 110 includes a support 111, a first arm 112 and a second arm 113. The support 111 is vertically fixedly connected to the base 120, the first arm 112 and the second arm 113 are vertically fixedly connected to the support 111, and the first arm 112 and the second arm 113 are parallel to the base 120; the first arm 112 and the second arm 113 are both provided with a fixing hole 114 at one end away from the support 111, and the sample bin 200 is fixedly clamped in the fixing hole 114. In this embodiment, the first arm 112 and the second arm 113 are provided to fix the sample bin 200, which can improve the stability of the sample bin 200 and prevent the spiral feed sheet 310 from causing the sample bin 200 to shake during the rotation process, so that the position of the feed port can be stabilized, thereby ensuring that the tobacco can smoothly enter the sampling barrel 500.

[0042] like Figure 3 As shown, in an optional embodiment, the automatic weighing device is also provided with a central processing unit 1100 and an operation panel 900, the operation panel 900 is fixedly connected to the support 111, and the central processing unit 1100 is electrically connected to the operation panel 900, the drive motor, the weighing sensor 1000 and the switch 600 respectively, and the switch 600 is a solenoid valve. The sampling process of this embodiment is specifically as follows: the operator presses the start button on the operation panel 900 to send a signal to the central processor 1100 to start sampling. The central processor 1100 receives the signal to start sampling and controls the first drive component 340 to drive the rotating feed sheet to rotate and control the solenoid valve to open. At this time, the tobacco flows out from the discharge port into the sampling barrel 500. During this process, the weighing sensor 1000 detects the total weight of the sampling barrel 500 in real time and sends the detected weight value to the central processor 1100. The central processor 1100 calculates the difference between the weight value and the net weight value of the sampling barrel 500. When the difference is equal to the set weight, the central processor 1100 simultaneously sends signals to the first drive component 340, the solenoid valve and the second drive component 700, so that the first drive component 340 stops driving, the solenoid valve is closed, and the second drive component 700 drives the sampling barrel 500 away from the bottom of the discharge port, and the recovery barrel 800 runs to the bottom of the discharge port, thereby completing the sampling process. During this process, no manual operation is required and the sampling accuracy can be guaranteed.

[0043] Those skilled in the art will appreciate that the operation panel 900 may be a touch screen or a button. In this embodiment, a touch screen is preferred. The operator may input the weight of each sampling through the touch screen, which is simple and convenient to operate.

[0044] The above describes in detail the structure, features and effects of the present application based on the embodiments shown in the drawings. The above are only preferred embodiments of the present application, but the present application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of the present application, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present application.

Claims

1. An automatic weighing device, characterized in that: It includes a rack, a sample chamber, an automatic feeding mechanism, a sampling table, a weighing sensor and a sampling bucket; The frame comprises a support arm and a base which are fixedly connected; the sample chamber is fixedly connected to the support arm, and the sample chamber is provided with a receiving chamber and a feeding port which is connected with the receiving chamber; the automatic feeding mechanism comprises a spiral feeding piece, and the spiral feeding piece is arranged in the receiving chamber and can rotate in the receiving chamber; The sampling platform is arranged on the base, the weighing sensor is fixedly connected to the sampling platform, the sampling bucket is placed on the sampling platform, and the opening of the sampling bucket faces the feeding port; The sample bin is provided with a feeding port, and the feeding port and the feeding port are located at two opposite ends of the sample bin; The automatic feeding mechanism also includes a fixed cover, a connecting rod and a first driving component; The fixed cover is detachably covered on the feeding port, the first driving component is fixedly connected to the fixed cover on a side facing the sample chamber; one end of the connecting rod is fixedly connected to the output end of the first driving component, the other end of the connecting rod extends into the containing chamber, and the spiral feeding sheet is fixedly wound on the connecting rod; It also includes a switch, which is fixedly arranged at the feeding port, and controls the opening or closing of the feeding port; The switch is a solenoid valve; The sampling platform is slidably connected to the base; the automatic weighing device further comprises a second driving component, the second driving component is fixedly connected to the support arm, and the output end of the second driving component is fixedly connected to the sampling platform; It also includes a recycling bucket and a recycling platform, wherein the recycling platform is slidably connected to the base, the recycling bucket is placed on the recycling platform, and the output end of the second driving component is also fixedly connected to the recycling platform; The second driving component drives the sampling platform away from the material discharge port, and also drives the recovery platform to move so that the opening of the recovery bucket faces the material discharge port; A slide groove is provided on the base, and slide rails are provided below the sampling platform and the recovery platform. The sampling platform and the recovery platform slide in the slide groove through their own slide rails.

2. The automatic weighing device according to claim 1, characterized in that: The connection point between the accommodating chamber and the feeding opening is funnel-shaped.

3. The automatic weighing device according to claim 2, characterized in that: The support arm comprises a support, a first arm and a second arm, the support is vertically fixedly connected to the base, the first arm and the second arm are vertically fixedly connected to the support, and the first arm and the second arm are parallel to the base; A fixing hole is formed at one end of the first arm and the second arm away from the support, and the sample chamber is fixedly clamped in the fixing hole.

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