Electronic scale outlet balance flow control method

A flow control and outlet weighing technology, applied in the direction of weighing, measuring device, weighing equipment with continuous material flow, etc., can solve the problem of increasing the actual flow of downstream equipment, affecting the normal operation of downstream equipment, etc., to achieve the effect of increasing applicability

Inactive Publication Date: 2014-03-12
XIAMEN TOBACCO IND
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Problems solved by technology

When the belt speed increases, the material in the discharge area quickly passes through the outlet, resulting in a sudden increase in the actual flow through the downstream equipment, thereby affecting the normal operation of the downstream equipment

Method used

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  • Electronic scale outlet balance flow control method
  • Electronic scale outlet balance flow control method
  • Electronic scale outlet balance flow control method

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Embodiment Construction

[0023] Now illustrate the present invention in conjunction with accompanying drawing and embodiment.

[0024] like figure 1 As shown, the flow control method of the traditional weighing area balance is to send a start signal to the electronic scale when the material in the limit tube reaches a certain level, and the motor 2 drives the transmission roller 3 and the drag roller 4 to drive the belt 5 to run, and the material is sent to the feeding area A. Go to weighing area B, calculate its instantaneous flow at the outlet of weighing area B, when its instantaneous flow deviates from the set flow, adjust the output frequency of its motor 2 through PID, thereby changing the running speed of belt 5, and realizing its stable instantaneous flow control purposes. When the supply of materials is insufficient, PID increases the frequency of the inverter to make the electronic scale run at high speed, and at the same time, the material in the discharge area C quickly passes through the...

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Abstract

An electronic scale outlet balance flow control method is provided; material passes a blanking zone, a weighting zone and a discharging zone of the electronic scale in sequence, and fast passes an electronic scale discharge outlet. After the material passes the weighting zone, material weight q (t) on per unit length of a belt of the weighting zone is stacked along the discharging zone length; the signal is taken on a stack pulling point; integral operation is carried out to the running speed v (t) of the material on the belt, thereby obtaining instantaneous flow; the instantaneous flow is compared with a set flow; the running speed of the belt is controlled through adjusting and changing the running speed v (t) of the material on the belt by PID. Compared with the prior art, the outlet balance flow control mode is added; through employing the control method, the follow up equipment real material flow increasing problem of caused by an inner control method and insufficient material supply of a belt scale in the prior art can be prevented, thereby enabling the outlet output flow to comply with the control requirement, and realizing the purpose of adding the applicability with downstream equipment.

Description

technical field [0001] The invention relates to a flow control mode of a controlled electronic scale in the tobacco industry, and is especially suitable for the control of the instantaneous flow at a discharge port of an electronic belt scale. Background technique [0002] At present, the structure of the control-type electronic scale used in the production of the domestic tobacco industry is as follows: figure 1 shown. When the material passes through the weighing area, its instantaneous flow rate is calculated in its weighing area, and its instantaneous flow rate at the T time interval is expressed by the following integral formula: [0003] W=q(t)V(t)dt [0004] In the formula: [0005] W: The instantaneous flow rate of the conveyed material within the T time interval; [0006] q(t): Material weight per unit length of the belt [0007] V(t): the running speed of the material on the belt [0008] in: [0009] q(t)=(V-V0)*K*weight calculation coefficient (fixed value...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G11/12
Inventor 兰志勇尤芳胜游文欣林水艇吴雄劲许广孚张梓泳
Owner XIAMEN TOBACCO IND
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