JPH0325113Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cylinder drum for drying sizing warp yarns and a drying cylinder drum for woven fabric, paper, film, etc., provided in a warp sizing dryer, for example. This is an improved version.

For example, in the warp sizing machine and the drying process of dyed cloth,
-24392 (the boiler is not shown), the cylinder is heated with heated steam generated by an external boiler, and the warp and cloth wound around the cylinder are dried. The disadvantage of this method of heating the cylinder with steam is that it requires a lot of time (1 to 2 hours) and thermal energy for warming up before steam generation. Decreased thermal efficiency and increased operating costs due to steam leaks; repair costs and time required for steam leaks; increased fuel consumption due to low heat exchange efficiency; and large-scale boiler equipment and its management technology. These include the need for larger floor spaces due to larger equipment, and the difficulty of maintenance and inspection.

As described above, steam-type drying cylinder heating devices have many drawbacks, such as shortened warming-up time, low running costs, energy saving, labor saving, reduced equipment costs, and high thermal efficiency. There is a strong demand for the development of a dry cylinder heating device that satisfies this demand.

Therefore, for example, direct-fire type models such as Utility Model No. 56-55585 (in which the cylinder serves as a drying chamber) and Utility Model No. 55-52313 (which is a drum heater for paper drying in which the burner is replaced with a heater) are available. One possible method is to use a gas burner to blow flame into the cylinder to heat it efficiently. However, with this method, not only the cylinder surface is not evenly heated, but also the warp, cloth,
This method is difficult to adopt because if the rotation of the cylinder is stopped during use as a drying cylinder for paper, film, etc., the surface temperature of the cylinder will rise rapidly and the warp threads will be burned out. Furthermore, overheating of the cylinder bearing may cause bearing failure.

The present invention aims to provide a new uniform heating device for drying cylinders that eliminates all the drawbacks of conventional steam heating devices, direct flame heating devices, etc.

That is, the cylinder heating device of the present invention uses a direct flame burner (gas or oil burner) as a heat source.
Thermal efficiency has been dramatically improved by adopting a burner (hereinafter simply referred to as a burner) and a group of steam pipes in the heat exchanger. The heated steam generated in the annular boiler cylinder in a vacuum is sent to a vacuum-structured drying cylinder to uniformly heat the cylinder, and the water condensed here is absorbed by the rotation of the cylinder. By using motion, it was returned to the boiler and reheated. As a result, the cylinder is heated quickly and evenly, and the cylinder surface temperature can be controlled to (60 to 160℃) due to the steam temperature in a vacuum.
This has the advantage that the surface temperature of the cylinder is evenly heated, and we succeeded in improving the heat insulation efficiency of the bearing section with the heat insulated bearing.

Hereinafter, the present invention will be explained with reference to the embodiments shown in the drawings. 1st
The figure shows an embodiment of the warp sizing dryer K, in which each warp row 2 let out from a required number of beams 1 mounted on a beam stand is sized via rollers 4 and squeezing rollers 5 in a sizing tank 3. Afterwards, it is sent to the drying room 6.
The warp rows 2 that have been glued and moistened are dried one after another in this drying chamber 6, and a large number of drying cylinders 10 provided at the upper part
...and bend it up and down and dry it on the surface of the cylinder. The surface temperature of this cylinder 10... is 60~
The temperature is controlled within a range of 160℃, and the temperature distribution is required to be uniform. The present invention is applied to the warp sizing dryer K, cloth, paper, and film. A heating device for uniformly heating the drying cylinders 10 is provided (described later). The dried warp row 2 is passed through a reed (not shown) and wound onto a loom beam 9.

Next, the drying cylinder uniform heating device 1 of the present invention
An example of 00 will be explained. For example, the drying cylinder 10 is made of rust-resistant metal such as stainless steel.
The flanges 13 _a and 13 _a at both ends are the bosses (flanges) 14 _a and 14' a of the small diameter shaft support tubes 14 and 14 _'.
The bearing members 11' and 12' are airtightly connected to each other by bolts, and are adiabatically supported by bearing members 11' and 12' in which an air layer is formed.
That is, an insulating cylinder 20 whose rear end is closed with a ring _14b is inserted into the small diameter shaft support cylinder 14 on the exhaust side, and hot negative pressure air in the gap X generated by the exhaust pressure from this insulating cylinder 20 is The air is discharged by introducing low temperature air through the small hole A, and the heat insulating effect of the gap X is exerted. Also, burner (oil or gas burner)
For the small-diameter shaft support tube 14' on the B _O side, a small hole _14'b is also carved in the draft tube through which cold air for combustion from the burner fan flows, and this allows the bearing 1
1' exerts a heat insulating effect. The annular boiler cylinder 13, which has a ring-shaped cross section and has a double structure, has a burner side connected to the inner wall of the flange _13a , and an exhaust side connected to the flange inner wall 14a via a thermal expansion absorber 21 connected to the tail end of the inner cylinder 13 _' . It is supported by a circular plate 22. This absorbs the thermal expansion that occurs when the annular boiler cylinder 13 is overheated by the burner. still,
The space S inside the cylinder 10 is made vacuum, and the annular boiler cylinder S' is filled with about 1/3 of the water W for steam generation, and the end surface _13a on the exhaust side has a large number of connections for blowing out steam. Holes _13b ... are bored. Heating space inside the cylinder 13' of the annular boiler cylinder 13
On the exhaust side half of S'', an annular heating steam pipe 23...
has both ends hermetically entered into the ring-shaped vacuum space S', and a large number of steam pipes 23 are arranged with their pipe ends 23 _a shifted by 90 degrees. Therefore, when the cylinder 10 is rotated clockwise, the pipe ends 23 _a of each steam pipe 23...
is pumped up into the pipe 23 (see Fig. 5), and the water W flowing into the pipe is heated by the burner and immediately becomes heated steam a with thermal efficiency and is blown out from the pipe end 23 _a into the space S' where there is no water W. Steam a is widely sent to the space S inside the cylinder 10 from communication holes 13 _b provided on the side opposite to the burner. Here, the steam that uniformly heated the cylinder 10 becomes condensate D and is stored at the bottom of the cylinder. Note that 24 is a conical guide tube through which the flame f effectively heats each steam pipe 23, and is supported at the center of the inner wall of the cylinder 13.

Finally, the condensate D accumulated at the bottom of the cylinder 10
Regarding the structure of the return member that returns the water to the vacuum space S' in the annular boiler cylinder 13, three curved lifting pipes 160 are arranged radially within the end of the cylinder on the burner side, and as shown in Fig. The outer end of the cylinder 160 contacts the inner wall of the cylinder 10, and the inner end thereof is airtightly connected to the outer circumferential wall of the annular boiler cylinder 13 and enters the vacuum space S'. The inner end opening of the pumping pipe 160 is connected to connection boxes 25 arranged at 120° intervals within the vacuum space S', and each connection box 25 connects to the vacuum space S' as shown in FIG. The inside is connected to the supply pipes 26, which are arranged at positions shifted by about 130 degrees in the circumferential direction (over each range), and the condensate D is introduced into the vacuum space S' from the tip port _26a ... It is configured to discharge. That is, when the drying cylinder 10 is rotated clockwise (in the direction of the arrow), the condensate D at the bottom is scooped up by the lift pipe 160 and introduced into the pipe. When the rotation of the cylinder 10 progresses further and the condensate D introduced into this pipe reaches the rotational position from B to C, the condensate D enters the junction box 2.
5 to the supply pipe 26, and its tip port 2
_6a acts as a pump to be supplied into the vacuum space S' on the outer peripheral side of the annular boiler cylinder 13. In addition, since the cylinder 10 is limited to clockwise rotation due to the orientation of the pumping pipes 160 and the supply pipes 26, the direction of each of the pipes 160 and 26 must be reversed to create a counterclockwise cylinder. It is sufficient if it is facing the direction. Further, according to this embodiment, the annular boiler cylinder 13
Since the heating steam pipes 23 are arranged on the inner circumferential side of the
_b ... is installed on the exhaust side (anti-burner side) of the annular boiler cylinder where the temperature is high, and the pumping pipe 160 for condensate D is installed on the burner side which is the outer peripheral side of the annular boiler cylinder where the temperature is low. There is good running water (supply).

The drying cylinder 10 of the present invention is as described above, and its operation will be explained below. First, to warm up the drying cylinder, turn on the open flame burner B _O
A controller (not shown) controls operation based on signals from a sensor (not shown).
The flame of burner B _O is adjusted based on the detected value from the sensor so that the surface temperature of the drying cylinder is controlled within a temperature range of 60 to 160°C. The annular boiler cylinder 13 in the drying cylinder immediately converts the water W into heated steam a by the combustion gas f, and this runs into the space S of the drying cylinder 10 through the communication hole 13 _b at the right end, and spreads over its entire surface. Heat quickly and at an even temperature. After heating, the steam decreases in temperature and condenses, and is stored as a drain D at the bottom of the cylinder 10.
This drain D is pumped up by the pumping pipe 160 as shown in FIGS. 3 and 5 by the clockwise rotation of the cylinder 10, and is collected from the connecting portion 25 and the supply pipe 26 into the base end side space S' of the annular boiler cylinder 13. and heated steam a again
In order to achieve this, a thermal cycle of reheating by burner B _O is repeated.

The drying cylinder uniform heating device of the present invention is not limited to the above-mentioned embodiment, and the design of each part can be changed freely, and the dryer is not limited to a warp sizing machine, but can also be used as a cloth dyeing machine. It can also be applied to dryers for paper-making thin veneers and other band products. Also,
The cylinder surface temperature may also be controlled using the steam temperature inside the cylinder, or the cylinder internal pressure may be detected and the burner firepower may be adjusted so as to maintain the pressure at a constant level.

When using the drying cylinder uniform heating device of the present invention, a double-structured annular boiler cylinder is integrally and airtightly placed inside a drying cylinder whose shaft support cylinders at both ends are rotatably supported by insulated bearing members with an air layer formed therein. The drying cylinder, the inside and outer periphery of the annular boiler cylinder are supported by a vacuum structure, and a burner is provided on one side of the shaft support cylinder to send a flame to the inner periphery of the annular boiler cylinder, and the inner periphery of the annular boiler cylinder is The annular heating steam pipe placed on the side exhaust side opens both ends to the outer circumferential side of the annular boiler cylinder,
A communication hole for sending the heated steam in this heated steam pipe into the drying cylinder is bored in the end face on the side opposite to the burner, and connected to the pumping pipe of the return member that returns the condensed water (water) in the drying cylinder to the annular boiler cylinder. The drying cylinder uniform heating device is installed with the box and supply pipes installed on the inner end surface of the drying cylinder on the burner side and on the outer periphery of the annular boiler cylinder.Thermal efficiency is dramatically improved by using a burner and a group of steam pipes as the heating source. At the same time, by running the heated steam widely inside the vacuumed drying cylinder, the cylinder surface is rapidly and uniformly heated, and the surface temperature does not rise above the steam temperature, preventing condensation inside the cylinder. Since the waste drain is collected into the boiler using the rotation of the cylinder, running costs are low, and maintenance and inspection of the cylinder, burner, etc. can be facilitated. Therefore, it exhibits many effects such as low equipment cost and compactness, making it excellent in applicability as a cylinder for a warp sizing dryer or a cloth dyeing dryer. It also has the effect of improving the heat insulation of the cylinder bearing member.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of a warp sizing dryer equipped with a group of drying cylinders of the present invention, Fig. 2 is a sectional view of the drying cylinder of the present invention and its heating device, and Fig. 3 is a line taken along line A-A in Fig. 2. 4 is a partial perspective view, and FIG. 5 is a sectional view taken along the line B--B in FIG. 2. B _O ...Burner, a...Heating steam, W...Water,
D...Drain, 10...Drying cylinder, _10a ...
...Shaft support tube, 11', 12'...Bearing member, 13...
Annular boiler cylinder, 13 _b ...Communication hole, 13 _C ...Small hole, 14, 14'...Small diameter shaft support tube, S, S'...Space, f...Flame, 20...Insulation tube, 23... ... Heating steam pipe, 26 ... Supply pipe, 160 ... Lifting pipe, 25 ... Connection box, 100 ... Drying cylinder uniform heating device.

Claims (1)

[Scope of utility model registration request] A double-structured annular boiler cylinder is integrally and airtightly supported in a drying cylinder in which shaft support cylinders at both ends are rotatably supported by heat-insulating bearing members with an air layer formed inside the drying cylinder and the annular boiler cylinder. and an annular heating steam pipe whose outer periphery has a vacuum structure, a burner that sends a flame to the inner periphery of the annular boiler cylinder is provided on one side of the shaft support cylinder, and is arranged on the exhaust side of the inner periphery of the annular boiler cylinder. Both ends are opened on the outer circumferential side of the annular boiler cylinder,
A communication hole for sending the heated steam in the heating steam pipe into the drying cylinder is bored in the end face on the side opposite to the burner, and the drain pipe of the recirculation member returns the condensed water (water) in the drying cylinder to the annular boiler cylinder. A drying cylinder uniform heating device characterized in that a connection box and a supply pipe are provided on the inner end surface of the drying cylinder on the burner side and on the outer circumferential side of the annular boiler cylinder.