Online tobacco stem dynamic weighing and metering device

Abstract

An online tobacco stem dynamic weighing and metering device relates to the technical field of cigarette production and comprises a hopper which is fixed at a certain height and used for inputting materials, and a feeding control valve is arranged at the bottom of the hopper; the weighing metering cylinder is arranged below the hopper and used for allowing materials to enter, and a discharging control valve is arranged at the bottom of the weighing metering cylinder; the weighing mechanism is used for supporting the weighing metering cylinder and weighing materials in the weighing metering cylinder; and the blanking funnel is arranged below the weighing metering cylinder, is communicated with the material conveying pipeline and is used for receiving the materials falling from the weighing metering cylinder. The utility model has the advantages of compact structure, small volume, high weighing and metering precision and stable performance, is particularly suitable for on-line dynamic high-precision weighing and metering in small or trace material conveying in narrow space, and can effectively improve the production efficiency and metering precision; and meanwhile, the device is also suitable for online dynamic weighing and metering in the bulk material conveying process except the tobacco industry, and the application prospect is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette production, in particular to an online tobacco stem and tobacco stick dynamic weighing and metering device. Background Art

[0002] At present, the research on the measurement of small and micro bulk materials is mostly focused on the filling and weighing of bulk materials in the food, pharmaceutical, gunpowder, ordnance and other industries, which is not suitable for online dynamic weighing and measurement during the bulk material transportation process; moreover, the existing weighing and metering devices are generally more complex in structure, occupy a large space, and have many weighing steps, which are not suitable for applications in places with narrow structural space; and some volumetric metering methods have low measurement accuracy and cannot meet the requirements of online dynamic weighing and measurement in the transportation of tobacco, stems, etc. in existing cigarette production.

[0003] Therefore, currently in the tobacco industry, quantitative volumetric tube measurement or manual sampling and weighing are used for the transportation and weighing of tobacco cuts and tobacco stems in cigarette production. However, due to the uneven bulk density of tobacco cuts and tobacco stems in the quantitative tubes and the limited samples of manual sampling, the accuracy is not high. In addition, the work efficiency of manual sampling and weighing is low, which seriously restricts the level of automated production in cigarette production. Utility Model Content

[0004] The utility model aims to provide an online tobacco stem and tobacco stick dynamic weighing metering device to improve the metering accuracy and weighing efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: an online tobacco stem dynamic weighing and metering device, comprising:

[0006] A hopper, fixed at a certain height, is used for feeding materials, and a feed control valve is provided at the bottom of the hopper;

[0007] A weighing and metering cylinder is provided below the hopper for feeding materials, and a discharge control valve is provided at the bottom of the weighing and metering cylinder;

[0008] A weighing mechanism, used for supporting a weighing and metering cylinder and weighing the material in the weighing and metering cylinder;

[0009] The dropping funnel is arranged below the weighing and metering cylinder and is connected to the material conveying pipeline to receive the material dropped from the weighing and metering cylinder.

[0010] Preferably, the weighing mechanism includes a horizontal bracket and a plurality of weighing sensors hung on the horizontal bracket, and the weighing metering cylinder is hung on each weighing sensor.

[0011] More preferably, a plurality of weighing sensors are suspended on a horizontal bracket along annular intervals, and the center of gravity of the whole formed by the weighing metering cylinder and the discharge control valve corresponds to the center of the area surrounded by each weighing sensor.

[0012] More preferably, the weighing and metering cylinder is further provided with a material level sensor.

[0013] More preferably, the inner diameter of the top inlet of the weighing and metering cylinder is larger than the inner diameter of the bottom outlet of the hopper.

[0014] More preferably, an adjustment seat for adjusting the height of the material conveying pipeline and the material dropping funnel is also installed at the bottom of the material conveying pipeline.

[0015] More preferably, the material conveying pipeline is a horizontal extraction pipe, and the material dropping funnel is in a "convex" shape and is vertically intersected and connected to the horizontal extraction pipe.

[0016] More preferably, the air inlet end of the horizontal pumping pipe is a conical cylindrical structure and the air inlet port is provided with a filter.

[0017] More preferably, the feed control valve is a horizontal gate valve, and the discharge control valve is a horizontal gate valve, a flap valve, or a pneumatic pinch valve.

[0018] More preferably, the hopper is mounted on an external machine platform via a fixed bracket.

[0019] Compared with existing technologies, this new device boasts a compact structure, small size, high weighing accuracy, and stable performance. It is particularly suitable for online dynamic high-precision weighing and metering during the conveyance of small or trace amounts of materials in confined spaces, effectively improving production efficiency and metering accuracy. This device is also suitable for online dynamic weighing and metering of bulk materials in conveying processes other than the tobacco industry, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure in the embodiment;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0022] In the picture:

[0023] 1——Fixed bracket 2——Hopper 3——Feed control valve

[0024] 4 - Material level sensor 5 - Horizontal bracket 6 - Weighing sensor

[0025] 7——Weighing and measuring cylinder 8——Discharge control valve 9——Drop funnel

[0026] 10——Material conveying pipe 11——Adjustment seat. DETAILED DESCRIPTION

[0027] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0028] It should be noted in advance that, in this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise expressly specified or limited, a first feature "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not being in direct contact but through another feature between them.

[0029] like Figure 1 and Figure 2 As shown, the online tobacco stem dynamic weighing and metering device includes a hopper 2 fixed at a certain height for material input, a feed control valve 3 is provided at the bottom of the hopper 2, and the hopper 2 is installed on an external machine through a fixed bracket 1; a weighing metering cylinder 7 is provided below the hopper 2 for material entry, and a discharge control valve 8 is provided at the bottom of the weighing metering cylinder 7; a weighing mechanism is used to support the weighing metering cylinder 7 and weigh the material in the weighing metering cylinder 7; a drop funnel 9 is provided below the weighing metering cylinder 7 and connected to the material conveying pipe 10 for receiving the material falling from the weighing metering cylinder 7.

[0030] In the above structure, the weighing mechanism includes a horizontal support 5 and multiple weighing sensors 6 suspended from the horizontal support 5, with a weighing drum 7 suspended from each weighing sensor 6. The multiple weighing sensors 6 are suspended from the horizontal support 5 along annular intervals. The center of gravity of the entire system formed by the weighing drum 7 and the discharge control valve 8 corresponds to the center of the area enclosed by each weighing sensor 6. This means that the center of gravity of the entire system is located at the center point of the sensor support, which helps maintain force balance and reduce errors caused by tilt or eccentricity. In addition, the weighing drum 7 is also equipped with a material level sensor 4 to prevent the material in the weighing drum 7 from exceeding the load capacity. A lower material level sensor can also be provided to detect when the material in the weighing drum 7 has been completely discharged.

[0031] It should be noted that multiple load cells 6 working together can improve the stability and accuracy of the entire system. Each cell measures the force it bears, and these measurements are then aggregated to calculate the total weight. This distributed measurement approach also reduces the impact of a single cell failure on the entire system and can correct for errors caused by improper installation or material inhomogeneities.

[0032] The parts not involved in weighing and metering, such as the aggregate temporary storage hopper 2 and the feed control valve 3, are fixed at an appropriate position below the machine base in the tobacco stem conveying line or on a floor-standing support frame through a fixed bracket 1. The purpose is to isolate the vibration influence of cigarettes and external factors on the weighing and metering device, and to keep the bracket surface of the weighing sensor 6 hanging under the horizontal bracket 5 horizontal to ensure that the multiple hanging sensors are in a horizontal position, thereby reducing the error of weighing and metering.

[0033] Those skilled in the art should know that the inner diameter of the top inlet of the weighing and metering cylinder 7 must be larger than the inner diameter of the bottom outlet of the hopper 2 to prevent the material in the hopper 2 from falling to the outside when the material is dropped. At the same time, in order to further avoid this situation, the upper end surface of the weighing and metering cylinder 7 suspended on the weighing sensor 6 and the feed control valve 3 fixed above are only left with an appropriate gap. On the one hand, it ensures that all materials can enter the weighing and metering cylinder 7 smoothly, and on the other hand, it can also ensure that there is no direct contact between them, so that the weighing and metering cylinder 7 is only suspended on the weighing sensor 6 to ensure the accuracy of weighing.

[0034] In this embodiment, an adjustment seat 11 for adjusting the height of the material conveying pipe 10 and the material drop hopper 9 is further mounted at the bottom of the material conveying pipe 10. The adjustment seat 11 can be implemented using a simple structure. For example, the adjustment seat 11 can be connected to the bottom bracket via bolts and nuts. After adjusting the height of the adjustment seat 11, the bolts and nuts can be used to re-secure it to maintain the height. Those skilled in the art will not encounter any technical obstacles in implementing the height adjustment of the adjustment seat 11.

[0035] The material conveying pipe 10 is a horizontal draw pipe. The material discharge hopper 9 is a "convex"-shaped structure that intersects and connects vertically to the horizontal draw pipe. This effectively reduces the impact of negative pressure from the draw on the discharge control valve 8, thereby improving weighing and metering accuracy. Furthermore, the air inlet end of the horizontal draw pipe is a tapered cylindrical structure with a filter installed at the air inlet port. The other end of the horizontal draw pipe is connected to the tobacco stem conveying pipe via a connecting hose, completing the negative pressure gas delivery of loose tobacco stems.

[0036] Furthermore, to achieve a compact structure and minimize the height and other dimensions of the online weighing and metering device, the feed control valve 3 and the discharge control valve 8 are configured as horizontal gate valves. If space permits, the discharge control valve 8 can also be configured as a flap valve or pneumatic pinch valve, or other valve with an on / off function.

[0037] The online tobacco stem dynamic weighing and metering device provided in the above embodiment is an over-flow accumulation type weighing and metering device embedded in the tobacco and tobacco stem conveying line. Its working principle is to continuously weigh and meter by over-flow in short intervals. Specifically, there are two metering modes for users to choose, namely according to the set tobacco stem mass and according to the set tobacco stem collection time. In cigarette production, when it is necessary to weigh and meter the tobacco stems, the discharge control valve 8 under the weighing and metering cylinder 7 is closed and the feed control valve 3 is opened. The tobacco stems are collected by the hopper 2 and enter the weighing and metering cylinder 7. When the accumulated tobacco stem mass in the weighing and metering cylinder 7 reaches the set mass or the accumulated tobacco stem feeding time reaches the set time, the feed control valve 3 is closed. At this time, the tobacco stems produced in the production are temporarily stored in the weighing and metering cylinder 7. After the weighing and metering system is stable, the high-precision weighing sensor 6 weighs the weighing and metering body (the whole formed by the weighing and metering cylinder 7 and the discharge control valve 8). ) and the total mass of the tobacco stems and sends a weighing signal to the electronic control device. The electrical and control processing device performs a counting and accumulation operation. After the weighing is completed, the discharge control valve 8 is opened, and the weighed tobacco stems are discharged into the drop funnel 9 below and are sucked away by the negative pressure airflow to complete the weighing, metering and transportation of the tobacco stems; when the material level sensor 4 detects that the material in the weighing metering cylinder 7 is discharged or the set discharge time is over, the discharge control valve 8 is closed and the feed control valve 3 is opened for the second weighing, which is repeated over and over again for continuous weighing, thereby realizing the dynamic weighing and metering of online tobacco stems.

[0038] Those skilled in the art should know that in order to meet the above two working modes, the weighing material level sensing closed-loop interlocking control technology can be adopted for the inlet and outlet control valves and the weighing sensor and the material level sensor, and the input setting weighing metering closed-loop interlocking control technology can be adopted for the inlet and outlet control valves and the weighing sensor and the mass setting value.

[0039] The online tobacco stem dynamic weighing and metering device of the utility model is an online dynamic weighing and metering device of flow-through weighing and metering, which has the characteristics of compact structure, small size, simple operation, high metering accuracy, no material blockage in online conveying weighing and metering, and wide application range, and has a very broad application prospect.

[0040] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are better implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. Online tobacco stem dynamic weighing and metering device, characterized in that: include: A hopper (2) is fixed at a certain height and is used for feeding materials. A feed control valve (3) is provided at the bottom of the hopper (2); A weighing and metering cylinder (7) is provided below the hopper (2) for feeding materials into the hopper, and a discharge control valve (8) is provided at the bottom of the weighing and metering cylinder (7); A weighing mechanism, used for supporting the weighing metering cylinder (7) and weighing the material in the weighing metering cylinder (7); A drop funnel (9) is arranged below the weighing and metering cylinder (7) and is connected to the material conveying pipe (10) for receiving the material dropped from the weighing and metering cylinder (7).

2. The online tobacco stem dynamic weighing and metering device according to claim 1, characterized in that: The weighing mechanism comprises a horizontal support (5) and a plurality of weighing sensors (6) hung on the horizontal support (5), and the weighing metering cylinder (7) is hung on each weighing sensor (6).

3. The online tobacco stem dynamic weighing and metering device according to claim 2, characterized in that: A plurality of weighing sensors (6) are suspended on a horizontal support (5) along annular intervals, and the center of gravity of the whole formed by the weighing metering cylinder (7) and the discharge control valve (8) corresponds to the center of the area surrounded by each weighing sensor (6).

4. The online tobacco stem dynamic weighing and metering device according to claim 3, characterized in that: The weighing metering cylinder (7) is also provided with a material level sensor (4).

5. The online tobacco stem dynamic weighing and metering device according to claim 1, characterized in that: The inner diameter of the top inlet of the weighing metering cylinder (7) is larger than the inner diameter of the bottom outlet of the hopper (2).

6. The online tobacco stem dynamic weighing and metering device according to claim 1, characterized in that: An adjustment seat (11) for adjusting the height of the material conveying pipeline (10) and the drop hopper (9) is also installed at the bottom of the material conveying pipeline (10).

7. The online tobacco stem dynamic weighing and metering device according to claim 1, characterized in that: The material conveying pipe (10) is a horizontal extraction pipe, and the drop funnel (9) is in a "convex" shape and is vertically intersected and connected to the horizontal extraction pipe.

8. The online tobacco stem dynamic weighing and metering device according to claim 7, characterized in that: The air inlet end of the horizontal pumping pipe is a conical cylindrical structure and a filter is provided at the air inlet port.

9. The online tobacco stem dynamic weighing and metering device according to claim 1, characterized in that: The feed control valve (3) is a horizontal plug valve, and the discharge control valve (8) is a horizontal plug valve, a flap valve, or a pneumatic pinch valve.

10. The online tobacco stem dynamic weighing and metering device according to any one of claims 1 to 9, characterized in that: The hopper (2) is mounted on an external machine platform via a fixed bracket (1).

Images