Flow control system for threshing and redrying production line
By setting up multiple level photoelectric tubes and over-limit photoelectric tubes in the material metering pipe of the leaf-beating and re-baking production line, stable control of material flow is achieved, the problem of flow fluctuations in the leaf-beating and re-baking production is solved, and the processing quality of tobacco leaves and tobacco stems is improved.
Patent Information
- Application Number
- CN202421246155.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
During the leaf-fruit production process, flow fluctuations make it difficult to control the moisture and temperature of tobacco leaves and tobacco stems, resulting in easy blockage of materials in the equipment, an increase in crushing rate, and a reduction in the use value of tobacco leaves.
A flow control system for leaf-burning and re-baking production line is designed. By setting multiple level photoelectric tubes and over-limit photoelectric tubes in the material metering tube, the material level in the metering channel and the material height in the material channel are detected. The controller controls the speed of the feed motor of the feed belt through the material level information to ensure the stability of the material flow.
It effectively solves the problem of flow fluctuations in each process section during the leaf-beating and re-baking production process, improves the stability of flow control, improves the rate of leaf-beating air separation, reduces the stems and leaves, and improves the processing quality level of tobacco leaves and tobacco stems after roasting.
Smart Images
Figure CN222622168U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of leaf threshing and redrying technology, and in particular to a flow control system for a leaf threshing and redrying production line. Background Art
[0002] In the process of controlling the production process of leaf threshing and redrying, flow rate, moisture content and temperature are three basic physical control quantities. In particular, the stability of flow rate control determines the processing quality of tobacco leaves in each process stage. It is the basic prerequisite for ensuring the stability of tobacco leaf moisture and temperature control. It is also the basic guarantee for improving the leaf separation rate of leaf threshing, reducing the leaf content in stems, and improving the quality of tobacco leaves and stems after baking. If the flow rate of tobacco leaves fluctuates greatly, it is very easy to make it difficult to control the moisture content and temperature of tobacco leaves and stems during the leaf threshing and redrying process, making the equipment prone to blockage and shutdown, increasing the crushing rate, and reducing the use value of tobacco leaves. Utility Model Content
[0003] In order to at least partially solve the above-mentioned problems, an embodiment of the present application provides a flow control system for a leaf threshing and redrying production line, the flow control system comprising a feed belt, a material metering tube, an electronic scale belt and a controller, the feed belt being used for conveying materials, and the feed belt being driven by a feed motor; the material metering tube being arranged at the output end of the feed belt, a metering channel for materials to pass through being formed in the material metering tube, a plurality of material level photoelectric tubes being arranged in the metering channel, the material level photoelectric tubes being used for detecting the material level in the metering channel, the plurality of material level photoelectric tubes being arranged along the extension direction of the metering channel, the material flowing out from the output end of the feed belt being able to enter the metering channel of the material metering tube from the entrance of the material metering tube; the electronic scale belt being arranged at the exit position of the material metering tube, the electronic scale belt being used for receiving the material flowing out from the exit of the material metering tube and conveying the material to the next process; the controller being communicatively connected with the feed motor and the plurality of material level photoelectric tubes; wherein the feed belt and the material metering tube are connected via a material channel, an over-limit photoelectric tube is also arranged in the material channel, and the over-limit photoelectric tube is communicatively connected with the controller.
[0004] In some embodiments, the material metering pipe is vertically arranged, and the inlet of the material metering pipe is arranged directly above the outlet of the material metering pipe.
[0005] In some embodiments, the multiple material level photoelectric tubes include a low material level photoelectric tube, which is arranged at the bottom of the metering channel. An outlet valve is also arranged at the outlet of the material metering tube, and the outlet valve is communicatively connected to the controller.
[0006] In some embodiments, the plurality of material level photoelectric tubes include a middle material level photoelectric tube, and the middle material level photoelectric tube is disposed in the middle of the metering channel.
[0007] In some embodiments, the plurality of material level photoelectric tubes include a high material level photoelectric tube, and the high material level photoelectric tube is disposed at an upper portion of the metering channel.
[0008] In some embodiments, the material channel is funnel-shaped.
[0009] In some embodiments, the electronic scale belt is driven by a discharge motor, and the discharge motor is communicatively connected to the controller.
[0010] The flow control system for the leaf threshing and redrying production line provided in the embodiment of the present application detects the material level in the metering channel through multiple material level photoelectric tubes, and the controller controls the speed of the feed motor of the feed belt through the material level information in the metering channel; at the same time, an over-limit photoelectric tube is further provided in the material channel, so that the material channel can be used as a buffer space for the material, thereby avoiding the situation where the material in the material metering tube exceeds the upper limit of the height, causing the material conveying to stop, causing the material on the electronic scale belt to produce flow fluctuations, and making the material flow more stable. The flow control system for the leaf threshing and redrying production line provided in the embodiment of the present application can solve the problem of flow fluctuations in each process section during the leaf threshing and redrying production process, further improve the stability of flow control, increase the leaf separation rate of the leaf threshing wind, reduce the stem content of leaves, and improve the processing quality level of cured tobacco leaves and stems. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0012] Figure 1 It is a schematic diagram of a flow control system for a leaf threshing and redrying production line provided in an embodiment of the present application;
[0013] Figure 2 It is a schematic diagram of a leaf threshing and redrying production line flow control system provided by an embodiment of the present application when it is in a shutdown phase;
[0014] Figure 3 It is a schematic diagram of a leaf threshing and redrying production line flow control system provided by an embodiment of the present application when it is in a pre-filling phase;
[0015] Figure 4 It is a schematic diagram of a leaf threshing and redrying production line flow control system provided by an embodiment of the present application when it is in a production phase;
[0016] Figure 5 It is a schematic diagram of the leaf threshing and re-drying production line flow control system provided in an embodiment of the present application when it is in the tailing phase.
[0017] The reference numerals are as follows:
[0018] 1. High material level photoelectric tube; 2. Middle material level photoelectric tube; 3. Low material level photoelectric tube; 4. Over-limit photoelectric tube.
[0019] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION
[0020] The technical scheme of the preferred embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection claimed in the present application.
[0021] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0022] The flow control system of the leaf threshing and redrying production line in the related technology usually controls the material flow through the material height data obtained from the material metering tube. However, when the material exceeds the maximum measuring height of the material metering tube, due to the lack of other monitoring means, it is often necessary to stop the material transportation of the feed belt to prevent the material flow from getting out of control. However, stopping the material transportation will cause large fluctuations in the material flow, affecting the subsequent process quality.
[0023] In view of this, the embodiment of the present application provides a flow control system for a leaf threshing and redrying production line, such as Figure 1-Figure 5As shown, the flow control system includes a feed belt, a material metering tube, an electronic scale belt and a controller. The feed belt is used to convey materials and is driven by a feed motor. The material metering tube is arranged at the output end of the feed belt. Preferably, the material metering tube is arranged vertically, and the inlet of the material metering tube is arranged directly above the outlet of the material metering tube. A metering channel for the material to pass through is formed in the material metering tube. A plurality of material level photoelectric tubes are arranged in the metering channel. The material level photoelectric tubes are used to detect the material level in the metering channel. The plurality of material level photoelectric tubes are arranged along the extension direction of the metering channel. The material flowing out from the output end of the feed belt can enter the metering channel of the material metering tube from the inlet of the material metering tube. Preferably, the multiple material level photoelectric tubes may include a low material level photoelectric tube 3, which is arranged at the bottom of the metering channel, and an outlet valve is also arranged at the outlet of the material metering tube, and the outlet valve is connected to the controller in communication, and the outlet valve can control the flow and cutoff of the material; the multiple material level photoelectric tubes may also include a middle material level photoelectric tube 2, which is arranged in the middle of the metering channel; the multiple material level photoelectric tubes may also include a high material level photoelectric tube 1, which is arranged at the upper part of the metering channel. The electronic scale belt is arranged at the outlet position of the material metering tube, and the electronic scale belt is used to receive the material flowing out of the outlet of the material metering tube and convey the material to the next process; the controller is connected to the feed motor and the multiple material level photoelectric tubes in communication; wherein the feed belt is connected to the material metering tube through the material channel, and an over-limit photoelectric tube 4 is also arranged in the material channel, and the over-limit photoelectric tube 4 is connected to the controller in communication. Preferably, the material channel is funnel-shaped, so that the material can gather and enter the material metering tube. In some embodiments, the electronic scale belt is driven by the discharging motor, and the discharging motor is connected to the controller in communication. This setting method can facilitate the simultaneous control of the conveying speed of the electronic scale belt, increase the control flexibility of the flow control system, and match the flow between the feed belt and the electronic scale belt.
[0024] The flow control system for the leaf threshing and redrying production line provided in the embodiment of the present application detects the material level in the metering channel through multiple material level photoelectric tubes, and the controller controls the speed of the feed motor of the feed belt through the material level information in the metering channel; at the same time, an over-limit photoelectric tube 4 is further provided in the material channel, so that the material channel can be used as a buffer space for the material, thereby avoiding the situation where the material in the material metering tube exceeds the upper limit of the height, causing the material conveying to stop, causing the material on the electronic scale belt to produce flow fluctuations, and making the material flow more stable. The flow control system for the leaf threshing and redrying production line provided in the embodiment of the present application can solve the problem of flow fluctuations in each process section during the leaf threshing and redrying production process, further improve the stability of flow control, increase the leaf separation rate of the leaf threshing wind, reduce the stem content of leaves, and improve the processing quality level of cured tobacco leaves and stems.
[0025] The leaf threshing and re-drying production line flow control system provided in the embodiment of the present application determines the equipment control mode by adding an over-limit photoelectric tube 4 to the material channel above the high-level photoelectric tube 1 of the material metering tube, and adjusts the control logic according to the batch production mode to determine the four production states of pre-filling phase, shutdown phase, production phase, and tail material phase, so as to achieve automatic control of the flow metering tube production process and solve the problem of constant flow and constant pressure feeding.
[0026] Specifically, the control modes of the flow control system may include:
[0027] (1) When the high material level photoelectric tube 1, the middle material level photoelectric tube 2, and the low material level photoelectric tube 3 indicate that there is no material in the material metering tube, or when the high material level photoelectric tube 1, the middle material level photoelectric tube 2 indicate that there is no material in the metering tube, and the low material level photoelectric tube 3 indicates that there is material, the feed belt runs at a high frequency;
[0028] (2) When the high-level photoelectric tube 1 shows that there is no material in the material metering tube and the medium-level photoelectric tube 2 and the low-level photoelectric tube 3 show that there is material in the material metering tube, the feed belt runs at a medium speed frequency;
[0029] (3) When the high material level photoelectric tube 1, the middle material level photoelectric tube 2, and the low material level photoelectric tube 3 show that there is material in the material metering tube, the feed belt runs at a low speed frequency;
[0030] (4) When the over-limit photoelectric tube 4, high material level photoelectric tube 1, middle material level photoelectric tube 2, and low material level photoelectric tube 3 indicate that there is material in the material metering tube, the feed belt runs at a low speed and stops after a delay of 5 seconds.
[0031] Specifically, the production status of the flow control system may include:
[0032] (1) Stop phase: Figure 2 As shown, when the material metering tube detection device is powered on and production has not started, the equipment resources are in a released state (not occupied by batch tasks), and the material in the equipment is emptied by the previous batch process and is in a material empty state. At this time, the material metering tube is in a shutdown phase, waiting for the new batch production process to start.
[0033] (2) Pre-filling phase: Figure 3 As shown, in the pre-filling phase, tobacco leaves enter the material metering tube until the middle material level photoelectric tube 2 is blocked, and the pre-filling process ends. In the pre-filling phase, the material metering tube does not discharge (does not enter the discharge state), and the material is stored in the material metering tube. The conditions for entering the pre-filling phase include the start of the front and rear stage equipment, the empty material metering tube, and the start of the upstream equipment to discharge.
[0034] (3) Production phase: Figure 4As shown, after the material is filled to the middle material level photoelectric tube 2 of the material metering tube, the pre-filling phase ends and enters the production phase, and a ready-to-discharge signal is provided to notify the downstream equipment that the material is ready. When the downstream equipment is ready to receive the material, the material metering tube enters the discharging state.
[0035] (4) Tail phase: Figure 5 As shown, when the batch production enters the final stage (the material source is empty, but the material on the production line is not empty), there is no discharge mark on the inlet equipment and the material status of the equipment is empty, the material metering tube enters the tailing phase, and the material in the material metering tube begins to be emptied until the high material level photoelectric tube 1, the middle material level photoelectric tube 2, and the low material level photoelectric tube 3 detect that the photoelectric tube has exposed the preset emptying time (the timing adopts a holding timer, and the downstream equipment operation signal is used as the enabling condition), the material metering tube status is converted to the empty state, waiting for the next pre-filling process or the end of production to enter the shutdown state.
[0036] Based on the above-mentioned embodiments of the present application, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.
[0037] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are only for illustration and not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. A flow control system for a leaf threshing and redrying production line, characterized in that: include: A feeding belt, the feeding belt is used to convey materials, and the feeding belt is driven by a feeding motor; A material metering tube, the material metering tube is arranged at the output end of the feed belt, a metering channel for the material to pass through is formed in the material metering tube, a plurality of material level photoelectric tubes are arranged in the metering channel, the material level photoelectric tubes are used to detect the material level in the metering channel, and the plurality of material level photoelectric tubes are arranged along the extension direction of the metering channel, and the material flowing out from the output end of the feed belt can enter the metering channel of the material metering tube from the inlet of the material metering tube; An electronic scale belt, which is arranged at the outlet of the material measuring pipe and is used to receive the material flowing out of the outlet of the material measuring pipe and transport the material to the next process; A controller, the controller being in communication with the feed motor and the plurality of material level photoelectric tubes; The feed belt and the material metering tube are connected via a material channel, an over-limit photoelectric tube is also provided in the material channel, and the over-limit photoelectric tube is communicatively connected with the controller.
2. The flow control system of the leaf threshing and redrying production line according to claim 1 is characterized in that: The material metering pipe is arranged vertically, and the inlet of the material metering pipe is arranged directly above the outlet of the material metering pipe.
3. The flow control system of the leaf threshing and redrying production line according to claim 2 is characterized in that: The multiple material level photoelectric tubes include a low material level photoelectric tube, and the low material level photoelectric tube is arranged at the bottom of the metering channel. An outlet valve is also arranged at the outlet of the material metering tube, and the outlet valve is communicatively connected with the controller.
4. The flow control system of the leaf threshing and redrying production line according to claim 3 is characterized in that: The plurality of material level photoelectric tubes include a middle material level photoelectric tube, and the middle material level photoelectric tube is arranged in the middle of the metering channel.
5. The flow control system of the leaf threshing and redrying production line according to claim 4 is characterized in that: The plurality of material level photoelectric tubes include a high material level photoelectric tube, and the high material level photoelectric tube is arranged at the upper part of the metering channel.
6. The flow control system of the leaf threshing and redrying production line according to claim 1, characterized in that: The material channel is funnel-shaped.
7. The flow control system of the leaf threshing and redrying production line according to claim 1, characterized in that: The electronic scale belt is driven by a discharging motor, and the discharging motor is communicatively connected with the controller.