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Air cushion pressure regulation device for fluid pulp box and regulation method

A pressure regulation and headbox technology, applied in textile and papermaking, paper machine, wet end of paper machine, etc., can solve the problems of affecting the air cushion pressure, high cost, affecting the spraying speed of the headbox, etc., and achieve low adjustment cost , the effect of high adjustment reliability and precision, and simple device structure

Inactive Publication Date: 2017-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are two problems with this method. One is high cost and needs to be equipped with high-precision sensors, control valves and controllers. The other is that the adjustment accuracy is affected by the measurement accuracy of the sensor and the adjustment accuracy of the control valve. An existing problem will affect the size of the air cushion pressure, thereby affecting the spraying speed of the headbox. Therefore, the stability of the spraying speed of the headbox is difficult to be well controlled

Method used

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  • Air cushion pressure regulation device for fluid pulp box and regulation method
  • Air cushion pressure regulation device for fluid pulp box and regulation method
  • Air cushion pressure regulation device for fluid pulp box and regulation method

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Embodiment 1

[0046] A kind of air cushion pressure regulating device that present embodiment is used for headbox, such asfigure 1 or figure 2 As shown, it includes pressure regulating barrel 1, pressure regulating pipe 6 and scale 7. The pressure regulating pipe is set in the middle of the pressure regulating barrel and its lower end extends into the pressure regulating barrel. The upper end of the pressure regulating pipe is connected with the air cushion chamber of the headbox, and the scale is fixed. It is arranged on the top surface of the pressure regulating barrel and parallel to the pressure regulating pipe; a supplementary water pipe 9 is arranged above the pressure regulating barrel, and an overflow pipe 2 is arranged on the side wall of the pressure regulating barrel. The air cushion pressure regulating device is installed on the driving side of the paper machine close to the headbox, such as image 3 As shown, the upper end of the pressure regulating pipe is connected with the ...

Embodiment 2

[0058] In this embodiment, the device described in Embodiment 1 can realize a method for adjusting the air cushion pressure of the headbox, which includes the following steps:

[0059] (1) An air cushion is formed in the air cushion chamber of the headbox, and the pressure regulating pipe communicates with the air cushion chamber;

[0060] (2) Pre-adjust the depth of the pressure regulating tube extending into the water in the pressure regulating barrel, so that the depth of the pressure regulating pipe extending into the water is equal to the height of the water column corresponding to the air cushion pressure;

[0061] (3) During the use of the headbox, the headbox forms the air cushion pressure through the intake pipe, and adjusts the air cushion pressure through the pressure regulating pipe exhaust. When the height of the water column corresponding to the air cushion pressure is greater than the depth of the pressure regulating pipe extending into the water , the excess ga...

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Abstract

The invention discloses an air cushion pressure regulation device for a fluid pulp box and a regulation method. The regulation device comprises a pressure regulation barrel, a pressure regulation pipe and a standard ruler, the pressure regulation pipe is arranged on the middle part of the pressure regulation barrel and its lower end extends into the pressure regulation barrel, the upper end of the pressure regulation pipe is communicated with an air cushion chamber of the fluid pulp box, the standard ruler is fixed on the top face of the pressure regulation barrel and is arranged in parallel with the pressure regulation pipe; a supplement water pipe is arranged on the upper side of the pressure regulation barrel, and an overflow pipe is arranged on the side wall of the pressure regulation barrel. The method comprises the steps that the depth of the pressure regulation pipe extending into the water in the pressure regulation barrel is regulated in advance, so that the depth of the pressure regulation pipe extending into the water is the same as the height of a water column corresponding to the air cushion pressure; in the using process of the fluid pulp box, when the air cushion pressure changes, through the regulation of the opening extent of an air venting outlet, the size of the air cushion pressure and the depth of the pressure regulation pipe extending into the water are kept stable. According to the air cushion pressure regulation device and the regulation method, the stability of the air cushion pressure in the air cushion room is effectively maintained, the device is simple in structure, the regulation cost is very low, and the adoption of precision control components and complex control systems is not necessary.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to an air cushion pressure regulating device and method for a headbox. Background technique [0002] The headbox is known as the "heart" of the paper machine. It is one of the key components of the paper machine and the hub connecting the two parts of "flow delivery" and "forming". It is also one of the fastest-growing components on the modern paper machine. [0003] In papermaking, the function of the headbox is to send the pulp that meets the requirements, has been processed by various necessary auxiliary equipment, and has various characteristics that meet the process conditions, to the forming wire according to the requirements of the forming part of the paper machine. Good shaping provides the necessary prerequisites. Therefore, the headbox must be able to maintain a stable relationship between the slurry speed and the net speed according to the process require...

Claims

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Application Information

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IPC IPC(8): D21F1/04D21F1/02
CPCD21F1/02D21F1/04
Inventor 刘建安齐亚楠樊慧明
Owner SOUTH CHINA UNIV OF TECH
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