CN216074518U - Culture paper head box device - Google Patents

Abstract

The utility model provides a culture paper pulp flow box device, which relates to the technical field of papermaking equipment and adopts the following scheme: including the pulse attenuation jar that sets gradually along the direction of feed, head box advance thick liquid pipeline, cloth thick liquid ware, balance chamber, turbulence generator, whitewashing device, breast roll, the pulse attenuation jar is installed on the last thick liquid pipeline of head box, whitewashing device includes lip and lower lip, goes up and forms the lip between lip and the lower lip, is provided with the lip at lip department and transfers the device always. The evenness condition of the whole paper web is effectively improved, the cross width deviation of the whole paper web is reduced, the quantitative loss is reduced when flat paper is produced, the benefit is improved, the paper cleaning width of a paper machine is expanded, and the paper edge loss is reduced.

Description

Culture paper head box device

Technical Field

The utility model relates to the technical field of papermaking equipment, in particular to a cultural paper pulp flow box device.

Background

The headbox (headbox) is a key part of modern paper machines. Its structure and properties are decisive for the formation of the sheet and the quality of the paper. Each headbox has an optimum range of vehicle speeds for use, an optimum product variety and quality range for production.

The current mainstream flow box devices at home and abroad are a hydraulic flow box and a hydraulic dilution water flow box, the closed (air cushion) flow box is relatively backward, the quantitative deviation of the banner is large, the waste is large, rotten pulp blocks and slurry hanging are easily generated, frequent cleaning is needed, and the product quality and the production efficiency of a paper machine are seriously influenced. Along with the continuous improvement of the quality requirement of current cultural paper market to the paper, original air cushion type head box can't satisfy customer's demand, and whole paper web's banner deviation is big, and the uniformity is poor, and the quality is general, and quantitative loss is great when producing the dull and stereotyped paper, seriously influences the performance of enterprises.

Therefore, in order to effectively improve the evenness of the whole paper web and reduce the cross-width deviation of the whole paper web, the development of a headbox device suitable for the process conditions of the paper machine, such as the speed, is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a cultural paper head box device, which is used for solving the problems of large cross-width deviation and poor evenness of the conventional whole paper web.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a culture paper head box device, includes that the pulse attenuation jar that sets gradually along the pay-off direction, head box advance thick liquid pipeline, cloth thick liquid ware, balance chamber, turbulence generator, whitewashing device, breast roll, the pulse attenuation jar is installed on the last thick liquid pipeline of head box, whitewashing device includes lip and lower lip, goes up and forms the lip between lip and the lower lip, is provided with the lip at lip department and transfers the device always. The pulp enters a pulp inlet pipeline from a side opening of the pulse attenuation tank, then enters a pulp flowing box pulp distributor, enters a balance chamber from the pulp distributor (the transverse turbulence of the pulp flow in a mixing balance chamber is reduced, so that the uniformity of the transverse quantitative distribution of paper sheets is improved), enters a turbulence generator from the balance mixing chamber for rectification, enters a pulp spraying device (the turbulence generator is used for uniformly mixing the pulp flow from the mixing chamber and dispersing the pulp and then stably delivering the pulp to the pulp spraying device), the pulp spraying device conveys the pulp to a forming net on the upper part of a breast roll, and a lip total adjusting device is adjusted according to the quantitative requirement of paper types, so that the opening degree of a lip of a pulp flowing box is conveniently adjusted. The evenness condition of the whole paper web is effectively improved, the cross width deviation of the whole paper web is reduced, the quantitative loss is reduced when flat paper is produced, the benefit is improved, the paper cleaning width of a paper machine is expanded, and the paper edge loss is reduced.

Furthermore, the slurry distributor is mainly formed by combining diffusion type tube bundles, and the diffusion type tube bundles are throttling variable-cross-section tubes. The diffusion type tube bundle adopts diffusion-throttling variable cross-section tubes which are subjected to precise calculation to transversely distribute and disperse the slurry from the slurry inlet main pipe, and the relatively simple straight tube bundle can ensure that the slurry has a better uniform distribution effect and a good dispersion characteristic, so that the quality of finished paper is ensured.

Further, a forming net is arranged on the upper portion of the breast roll. The pulp is fed by the guniting device onto the forming wire above the breast roll.

Furthermore, the pulse attenuation tank is an air cushion type pulse attenuation tank.

Furthermore, a total pressure sensor is arranged at the lip and electrically connected with the total pressure control part. The control of the pulp network speed ratio is that a total pressure sensor at the lip of a head box measures a pulp spraying total pressure signal and transmits the pulp spraying total pressure signal to a total pressure control part; and through the operation of the total pressure control part, the total pressure of the guniting is controlled by controlling the frequency converter and further controlling the rotating speed of the starching pump, and finally the guniting speed is controlled.

Furthermore, a mechanical liquid level sensor is arranged in the pulse attenuation tank, and a filter, a pressure reducing valve and a pressure gauge are arranged on a pipeline of the pulse attenuation tank. Pulse attenuation tank control (in situ mechanical control): the liquid level control of the pulse attenuation is realized by controlling the air inlet/outlet amount of compressed air by a mechanical liquid level sensor arranged in the attenuator, and the compressed air is provided by a filter, a pressure reducing valve and a pressure gauge.

Sizing cone pressure balance control (manual in-situ control): and observing the in-situ pressure balance indicating pipe on the taper pipe, and adjusting the size of the reflux valve to balance the pressure of the taper pipe.

Furthermore, a lip fine-adjustment device is arranged at a position close to the lip total-adjustment device. And determining whether to adjust the lip fine adjustment device according to the quantitative banner deviation condition.

And the operation position is arranged on a lip opening control box on the operation side of the head box, lip opening signals are provided by a displacement transmitter and a proximity switch, and opening numerical values are displayed on a control box panel. The function of conveniently adjusting the opening degree of the lip of the head box is realized.

According to the total pressure of the head box, the speed of the input net part and the set value of the pulp net speed ratio, after the PLC calculates, the PLC outputs a signal to control the rotating speed of the upper (punching) pulp pump, and the pressure head of the head box is kept stable.

According to the technical scheme, the utility model has the following advantages:

this scheme provides a culture paper head box device, use the pulse decay jar to reduce the thick liquid stream pulse in order to guarantee to press steadily totally, the design of full STREAMING hydraulic type head box, remove even pulp roller, the weir pond, adopt the cone angle spout, turbulence generator tube bank replaces honeycomb tube bank, the evenness situation of effectual improvement whole paper web, reduce the banner deviation of whole paper web, quantitative loss reduces during the production dull and stereotyped paper, the benefit improves, the paper machine net paper width has been expanded, reduce the paper margin loss, output improves, ton paper energy consumption reduces.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure, 1, a pulse attenuation tank, 2, a pulp inlet pipeline of a head box, 3, a pulp distributor, 4, a balance chamber, 5, a turbulence generator, 6, a lip total adjusting device, 7, a lip fine adjusting device, 8, a filter, 9, a pressure reducing valve, 10, a pressure gauge, 11, a mechanical liquid level sensor, 12, a displacement transmitter, 13, a proximity switch, 14, a total pressure control part, 15, a base, 16, a pulp spraying device, 17, a total pressure sensor, 18, a breast roll, 19 and a lip opening control box.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 1, the present embodiment provides a cultural paper headbox device, which includes a pulse attenuation tank 1, a headbox pulp inlet pipe 2, a pulp distributor 3, a balance chamber 4, a turbulence generator 5, a pulp jet device 16, a breast roll 18, which are sequentially arranged along a feeding direction, wherein the pulse attenuation tank 1 is installed on a sizing pipe of the headbox, the pulp jet device 16 includes an upper lip plate and a lower lip plate, a lip is formed between the upper lip plate and the lower lip plate, a lip total adjustment device 6 is arranged at the lip, a lip fine adjustment device 7 is arranged at a position close to the lip total adjustment device 6, the balance chamber 4 and the turbulence generator 5 are positioned in a box body, and the box body is installed on a base 15.

Wherein, the slurry distributor 3 is mainly formed by combining a diffusion type pipe bundle which is a throttling variable cross-section pipe. The diffusion type tube bundle adopts diffusion-throttling variable cross-section tubes which are subjected to precise calculation to transversely distribute and disperse the slurry from the slurry inlet main pipe, and the relatively simple straight tube bundle can ensure that the slurry has a better uniform distribution effect and a good dispersion characteristic, so that the quality of finished paper is ensured. Above the breast roll 18 a forming wire is arranged, onto which the pulp is fed by means of a pulp jet 16.

The pulse attenuation tank 1 is an air cushion type pulse attenuation tank 1, a total pressure sensor 17 is arranged at a lip, and the total pressure sensor 17 is electrically connected with the total pressure control part 14. The pulse attenuation tank 1 is internally provided with a mechanical liquid level sensor 11, and a pipeline of the pulse attenuation tank 1 is provided with a filter, a pressure reducing valve 9 and a pressure gauge 10.

In addition, the control position is also included, the control position is operated on a lip opening control box 19 positioned on the operation side of the headbox, lip opening signals are provided by the displacement transmitter 12 and the proximity switch 13, and the opening value is displayed on a control box panel.

The working principle is as follows: the pulp enters from the pulse attenuation tank 1 of the pressure screen (the pulse attenuation tank 1 can greatly reduce the pulsation from the approach system to improve the index of the finished paper), enters into the pulp inlet pipeline from the side port of the pulse attenuation tank 1, then enters into the pulp distribution device 3 of the head box, enters into the balance chamber 4 from the pulp distribution device 3 (the transverse turbulence of the pulp flow in the mixing balance chamber 4 is reduced, thereby improving the uniformity of the transverse quantitative distribution of the paper sheet), enters into the turbulence generator 5 from the balance mixing chamber for rectification, the turbulence generator 5 enters into the pulp spraying device 16 (the turbulence generator 5 is used for uniformly mixing the pulp flow from the mixing chamber and dispersing the pulp and then stably delivering to the pulp spraying device 16), the pulp spraying device 16 delivers the pulp onto the forming net on the upper part of the breast roll 18, the lip total adjusting device 6 is adjusted according to the quantitative requirement of the paper type, and the opening degree of the head box lip is conveniently adjusted. The evenness condition of the whole paper web is effectively improved, the cross width deviation of the whole paper web is reduced, the quantitative loss is reduced when flat paper is produced, the benefit is improved, the paper cleaning width of a paper machine is expanded, and the paper edge loss is reduced.

The control principle is as follows: (1) the control of the pulp network speed ratio is that a total pressure sensor 17 measures a pulp spraying total pressure signal from a head box lip and transmits the pulp spraying total pressure signal to a total pressure control part 14; the total pressure of the guniting is controlled by the operation of the total pressure control part 14 and the rotating speed of a sizing pump is controlled by controlling a frequency converter, so that the total pressure of the guniting is controlled, and the guniting speed is finally controlled; (2) pulse attenuation tank 1 control (in situ mechanical control): the liquid level control of the pulse attenuation is realized by controlling the air inlet/outlet amount of compressed air by a mechanical liquid level sensor 11 arranged in the attenuator, and the compressed air is provided by a filter 8, a pressure reducing valve 9 and a pressure gauge 10; (3) sizing cone pressure balance control (manual in-situ control): observing an in-situ pressure balance indicating pipe on the taper pipe, and adjusting the size of the reflux valve to balance the pressure of the taper pipe; (4) lip opening control (in-situ control): the lip opening of the headbox can be adjusted by operating a lip opening control box 19 on the operating side of the headbox. The lip opening degree signal is provided by a displacement transmitter 12 and a proximity switch 13, and the opening degree value is displayed on a control box panel; (5) according to the total pressure of the head box, the speed of the input net part and the set value of the pulp net speed ratio, after the PLC calculates, the PLC outputs a signal to control the rotating speed of the upper (punching) pulp pump, and the pressure head of the head box is kept stable.

The terms "upper", "lower", "outside", "inside", and the like in the description and claims of the present invention and the above-described drawings (if any) are used for distinguishing relative positions without necessarily being construed qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The utility model provides a culture paper head box device, its characterized in that includes the pulse attenuation jar, the head box that set gradually along the pay-off direction and advances thick liquid pipeline, cloth thick liquid ware, balance chamber, turbulence generator, whitewashing device, breast roll, and the pulse attenuation jar is installed on the last thick liquid pipeline of head box, whitewashing device includes lip board and lower lip board, forms the lip between upper lip board and the lower lip board, is provided with the lip at lip department and transfers the device always.

2. The cultural paper headbox apparatus of claim 1, wherein the spreader is comprised of a combination of diffuser type tube bundles, the diffuser type tube bundles being throttle variable cross-section tubes.

3. The cultural paper headbox apparatus of claim 1, wherein the upper portion of the breast roll is provided with a forming wire.

4. The cultural paper headbox apparatus of any one of claims 1-3, wherein the pulse attenuation tank is an air cushion pulse attenuation tank.

5. The cultural paper headbox apparatus of claim 4, wherein a total pressure sensor is disposed at the lip, the total pressure sensor being electrically connected to the total pressure control section.

6. The cultural paper headbox apparatus of claim 5, wherein a mechanical level sensor is disposed in the pulse attenuation tank, and a filter, a pressure relief valve, and a pressure gauge are disposed in the pipe of the pulse attenuation tank.

7. The cultural paper headbox apparatus of claim 6, wherein a lip trim is provided adjacent to the lip trim.

8. The cultural paper headbox apparatus of claim 1, further comprising an operator station for operating a lip opening control box located on an operator side of the headbox, wherein the lip opening signal is provided by a displacement transducer and a proximity switch, and wherein the opening value is displayed on a control box panel.

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