阅读说明：本技术 瓦楞纸板生产线蒸汽加热辊疏水结构 (Corrugated board production line steam heating roller hydrophobic structure ) 是由 胡恒峰 曹欢 黄艮兵 曾坤 于 2020-07-30 设计创作，主要内容包括：瓦楞纸板生产线蒸汽加热辊疏水结构,包括蒸汽加热辊(1)及其设置在蒸汽加热辊(1)内的虹吸管,其特征在于蒸汽加热辊(1)内设置有随蒸汽加热辊(1)同步运动的螺旋导流片(2),且该螺旋导流片(2)的外螺旋线与蒸汽加热辊(1)内部相接触或相连接。本发明涉及蒸汽加热辊领域,具体涉及一种用于瓦楞纸板生产线上的蒸汽加热辊疏水结构。本发明优点是：改变了传统蒸汽加热辊中蒸汽冷凝后形成的冷凝水自然吸附在缸体内腔的结构。通过创新设计螺旋导流片,螺旋导流版的旋转方向按蒸汽加热辊的旋转方向设计。(A corrugated board production line steam heating roller hydrophobic structure comprises a steam heating roller (1) and a siphon arranged in the steam heating roller (1), and is characterized in that a spiral flow deflector (2) moving synchronously with the steam heating roller (1) is arranged in the steam heating roller (1), and the outer spiral line of the spiral flow deflector (2) is in contact with or connected with the inside of the steam heating roller (1). The invention relates to the field of steam heating rollers, in particular to a steam heating roller drainage structure for a corrugated board production line. The invention has the advantages that: the structure that condensed water formed after steam condensation in the traditional steam heating roller is naturally adsorbed in the inner cavity of the cylinder body is changed. The spiral flow deflector is innovatively designed, and the rotating direction of the spiral flow deflector is designed according to the rotating direction of the steam heating roller.)

1. A corrugated board production line steam heating roller hydrophobic structure comprises a steam heating roller 1 and a siphon arranged in the steam heating roller 1, and is characterized in that a spiral flow deflector 2 which synchronously moves along with the steam heating roller 1 is arranged in the steam heating roller 1, and an outer spiral line of the spiral flow deflector 2 is contacted with or connected with the inside of the steam heating roller 1.

2. The steam heated roller hydrophobic structure of corrugated board production line as claimed in claim 1, wherein the cross-sectional area of the spiral guide vane (2) is one of rectangular, trapezoidal or circular arc.

3. A steam heated roller hydrophobic structure for corrugated board production line as claimed in claim 1, wherein the outlet of the spiral guide vane (2) corresponds to the inlet of the siphon tube.

4. A steam heated roll hydrophobic structure of corrugated board production line as claimed in claim 1, 2 or 3, characterized in that the spiral guide vane (2) is designed by the following method:

1) according to the condensed water load of the steam heating roller (1), calculating the maximum flow rate of the condensed water;

υ=Q/ρ/（π*d²*10^-6/4）*ζ/3600，

wherein upsilon is the flow speed m/s of condensed water in the steam heating roller (1),

q is the load of condensed water kg/h,

rho is the density kg/m of condensed water,

d is the diameter mm of the siphon pipe,

zeta is the coefficient of the discharge capacity of the condensed water;

2) converting the running speed into the rotating speed of the steam heating roller (1);

n=V/60/π/D*1000*γ，

wherein n is the rotating speed r/s of the steam heating roller (1),

v is the running speed m/min of the watt line,

d is the diameter mm of the steam heating roller (1);

gamma is an edge pressing coefficient;

3) calculating the minimum pitch of the spiral guide vane (2);

p=υ/n *1000,

wherein p is the pitch mm of the spiral flow deflector (2),

upsilon is the flow speed m/s of condensed water in the steam heating roller (1);

n is the rotating speed r/s of the steam heating roller (1);

4) a helix angle;

θ=arctan(p/(π*D))*180/π，

wherein theta is a helix angle DEG,

p is the pitch mm of the spiral guide vane (2),

d is the diameter mm of the steam heating roller (1).

5. The steam heated roll hydrophobic construction for corrugated board production line as recited in claim 1, wherein ζ is a condensed water displacement factor of 3 to 5.

Technical Field

The invention relates to the field of steam heating rollers, in particular to a steam heating roller drainage structure for a corrugated board production line.

Background

At present, in the corrugated paper forming process, a steam heating roller (a specific structural form comprises a hot cylinder and a corrugated roller on a tile line) is required to have certain temperature, so that the raw paper can form a corrugated shape after being preheated by the steam heating roller and pressed into tiles, and a corrugated board is produced;

the steam heating roller is mainly heated by steam, and the steam is introduced into the inner cavity of the steam heating roller to heat the cylinder body and heat the base paper. Steam after through the heat exchange condenses into water, through the siphon, discharges the comdenstion water outside the steam heating roller to guarantee the high-efficient heat exchange of steam heating roller.

However, there are problems in that: ) Because the condensed water exists in the inner cavity of the whole cylinder body, the condensed water film is very thin, a certain distance exists between the siphon and the surface of the inner cavity, the condensed water cannot be sucked out, the condensed water film is covered on the inner surface of the cylinder body to form thermal resistance, the heat exchange between the steam and the steam heating roller is reduced, the temperature of the outer surface of the steam heating roller is reduced, the corrugated paper board produced is not shaped, the speed of the vehicle is influenced, and the like; ) When the steam heating roller stops operating, condensed water cannot be sucked out due to the fact that a certain distance exists between the siphon and the inner surface of the cavity of the steam heating roller, and the condensed water is stored at the bottom of the steam heating roller. The steam heating roller is deformed and bent due to the temperature difference between the upper part and the lower part, so that the base paper is heated unevenly; with corrugating rollers in steam heated rollers, this can result in a portion of the waste single-shingled paper being produced upon re-run.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a steam heating roller hydrophobic structure for a corrugated board production line.

The invention comprises a steam heating roller and a siphon pipe arranged in the steam heating roller, wherein a spiral flow deflector which synchronously moves along with the steam heating roller is arranged in the steam heating roller, and the outer spiral line of the spiral flow deflector is contacted with or connected with the inside of the steam heating roller.

The cross section of the spiral flow deflector is one of a rectangle, a trapezoid or an arc.

The outlet of the spiral flow deflector corresponds to the inlet of the siphon.

The design method of the spiral guide vane comprises the following steps:

1) calculating the maximum flow rate of the condensed water according to the condensed water load of the steam heating roller;

υ=Q/ρ/（π*d²*10^-6/4）*ζ/3600，

wherein upsilon is the flow speed m/s of condensed water in the steam heating roller,

q is the load of condensed water kg/h,

rho is the density kg/m of condensed water,

d is the diameter mm of the siphon pipe,

zeta is the coefficient of the discharge capacity of the condensed water;

2) the running vehicle speed is converted into the rotating speed of the steam heating roller,

n=V/60/π/D*1000*γ，

wherein n is the rotation speed r/s of the steam heating roller 1,

v is the running speed m/min of the watt line,

d is the diameter mm of the steam heating roller;

gamma is an edge pressing coefficient;

3) calculating the minimum pitch of the spiral guide vane,

p=υ/n *1000,

wherein p is the pitch mm of the spiral guide vane,

upsilon is the flow speed m/s of condensed water in the steam heating roller;

n is the rotating speed r/s of the steam heating roller;

4) helix angle

θ=arctan(p/(π*D))*180/π，

Wherein theta is a helix angle DEG,

p is the pitch mm of the spiral guide vane,

d is the diameter mm of the steam heating roller.

And zeta is the discharge coefficient of condensed water of 3-5.

The invention has the advantages that: the structure that condensed water formed after steam condensation in the traditional steam heating roller is naturally adsorbed in the inner cavity of the cylinder body is changed. Through the innovative design spiral water conservancy diversion piece, the direction of rotation design according to the steam heating roller of the direction of rotation of spiral water conservancy diversion version makes the steam heating roller when operation, and the comdenstion water is just along with the direction of motion drainage to the one end of cylinder body installation siphon of steam heating roller to make things convenient for the siphon to discharge the comdenstion water roll body. Therefore, the problems that the heat transfer efficiency is reduced and the tile roller is deformed when the engine is shut down due to the fact that condensed water is accumulated in the whole cylinder body are solved.

Description of the drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the spiral guide vane 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention usually place when using, the present invention is only used for convenience of description and simplification of the description, but does not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and thus, the present invention should not be construed as being limited. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in the figure, the invention comprises a steam heating roller 1 and a siphon pipe arranged in the steam heating roller 1, wherein a spiral guide vane 2 synchronously moving along with the steam heating roller 1 is arranged in the steam heating roller 1, and the outer spiral line of the spiral guide vane 2 is contacted with or connected with the inside of the steam heating roller 1.

The cross section of the spiral flow deflector 2 is one of a rectangle, a trapezoid or an arc.

The outlet of the spiral flow deflector 2 corresponds to the inlet of the siphon.

The design method of the spiral guide vane 2 is as follows:

1) calculating the maximum flow rate of the condensed water according to the condensed water load of the steam heating roller 1;

υ=Q/ρ/（π*d²*10^-6/4）*ζ/3600，

wherein upsilon is the flow speed m/s of condensed water in the steam heating roller 1,

q is the load of condensed water kg/h,

rho is the density kg/m of condensed water,

d is the diameter mm of the siphon pipe,

zeta is the coefficient of the discharge capacity of the condensed water;

2) the running vehicle speed is converted into the rotation speed of the steam heating roller 1,

n=V/60/π/D*1000*γ，

wherein n is the rotation speed r/s of the steam heating roller 1,

v is the running speed m/min of the watt line,

d is the diameter mm of the steam heating roller 1;

gamma is an edge pressing coefficient;

3) the minimum pitch of the helical guide vanes 2 is calculated,

p=υ/n *1000,

wherein p is the pitch mm of the spiral guide vane 2,

upsilon is the flow speed m/s of condensed water in the steam heating roller 1;

n is the rotating speed r/s of the steam heating roller 1;

4) helix angle

θ=arctan(p/(π*D))*180/π，

Wherein theta is a helix angle DEG,

p is the pitch mm of the spiral guide vane 2,

d is the diameter mm of the steam heating roller 1.

And zeta is the discharge coefficient of condensed water of 3-5.

The working principle of the spiral flow deflector 2 is as follows: condensed water formed after steam condensation exists in the steam heating roller 1, when the steam heating roller 1 runs at a high speed in the production process, the condensed water in the steam heating roller 1 also rotates along with the steam heating roller, gradually gathers towards the front part of the cylinder body along the flow guide of the spiral flow guide sheet 2, and a thicker condensed water layer is formed at the front part of the steam heating roller 1, namely the thickness of the wall layer of the condensed water at other parts of the steam heating roller 1 is reduced, and the heat transfer efficiency is improved; meanwhile, the siphon is beneficial to discharging the condensed water, and the condensed water accumulation in the steam heating roller 1 is reduced.