JP2004160908A - Steam heating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam heating apparatus capable of omitting wrapping, simplifying a vulcanization process and shortening an operation time. <P>SOLUTION: A closed container 1, a liquid circulation means 4 and a mixing means 3 are jointed with one another through a circulation pathway 2. To the mixing means 3 a steam supplying tube 6 and a compressed air supplying tube 7 are jointed through control valves 8 and 9 respectively. A pressure sensor 10 and a temperature sensor 11 are set forth in the circulation pathway 2. Steam and compressed air are mixed by the mixing means 3 and the resulting steam and compressed air, which are under the predetermined pressure, are supplied to the container 1, whereby heating can be performed under the optional pressure and temperature according to the respective partial pressures. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for heating an object to be heated with steam, and more particularly to a steam heating apparatus capable of arbitrarily adjusting the pressure and temperature of the article to be heated by using a mixed fluid of steam and compressed air.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 50-3483 relates to a method for vulcanizing a rubber roll, in which a rubber raw material is rolled into a sheet, laminated around a core material, and the surface thereof is made into a film sheet or cloth. It is wrapped with tape or the like and vulcanized with hot steam.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional device, after an operator wraps and vulcanizes a film sheet around a rubber roll, the operator has to remove the film sheet again, which makes the operation process complicated and takes time for the operation process. There was a problem to take.
[0004]
The reason for wrapping the unvulcanized rubber in this way is to prevent the rubber from expanding during vulcanization and from being deformed by heat.
[0005]
Therefore, an object of the present invention is to make it possible to arbitrarily adjust the pressure and temperature of a mixed fluid of steam and compressed air as a heating source, to eliminate the need for lapping, to simplify the heating step for vulcanization, and to reduce the working time. The aim is to obtain a steam heating device that can be shortened.
[0006]
[Means for Solving the Problems]
Means taken to solve the above-described problem is to arrange the object to be heated in a closed container and supply heating steam into the container to heat the object to be heated. A circulation path for circulating the inside and the outside is arranged, and a mixing means for mixing steam and compressed air is attached to the circulation path, and a mixed fluid of steam and compressed air is supplied from the mixing means via the circulation path to a closed container. Fluid circulating means for circulating the fluid in the circulation path while supplying the fluid into the inside is arranged to circulate the fluid between the closed container and the mixing means.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
When supplying a mixed fluid of steam and compressed air from the mixing means into the closed container, by adjusting the partial pressure of steam and compressed air, respectively, it is possible to supply a mixed fluid of any pressure or temperature into the container, The object to be heated can be heated.
[0008]
In the case of steam, strictly speaking, in the case of saturated steam, the pressure and temperature are uniquely determined, and the temperature can be set to an arbitrary value by adjusting the pressure.
[0009]
While adjusting the steam pressure to set the steam temperature to a predetermined value suitable for heating, the sum of the partial pressures of the steam and the compressed air is set to a predetermined pressure that does not cause expansion or deformation of the rubber during vulcanization due to heat dripping. By setting, heating can be performed without wrapping.
[0010]
By arranging the fluid circulating means in the circulation path, the mixed fluid of steam and compressed air is circulated from the mixing means to the inside of the closed container and from the mixing means to the inside of the closed container again, so that the steam and the compressed air can be reliably ensured. The temperature inside the sealed container is made uniform and uniform temperature distribution is prevented, so that temperature unevenness can be prevented and the whole object to be heated can be uniformly heated.
[0011]
【Example】
FIG. 1 shows a first embodiment. In FIG. 1, a vulcanizing can 1 as a closed container, a circulation path 2, a mixing means 3 for mixing steam and compressed air arranged in the circulation path 2, and a fluid circulation means 4 constitute a steam heating device. I do.
[0012]
The mixing means 3 has a horizontally long cylindrical mixing vessel 5 connected to a steam supply pipe 6 and a compressed air supply pipe 7. Each supply pipe 6, 7 has a control valve 8, which can adjust the supply amount. 9 is attached.
[0013]
The mixing vessel 5 and the closed vessel 1 are connected by the circulation path 2. A pressure sensor 10 and a temperature sensor 11 for detecting the pressure and temperature of a mixed fluid of steam and compressed air supplied to the container 1 are attached to the circulation path 2. The sensors 10 and 11 are electrically connected to actuators of the control valves 8 and 9 via a controller (not shown). The control valves 8 and 9 can control the partial pressures of the steam and the compressed air arbitrarily by increasing or decreasing the valve opening degree.
[0014]
At the inlet side of the vulcanizing can 1 as a closed container, a separator 12 for separating the condensed condensate of the vapor present in the circulation path 2 from the vapor and the compressed air into gas and liquid is attached. A steam trap 13 for discharging only condensed water separated into gas and liquid to the outside is connected to a lower portion of the separator 12. Inside the vulcanizing can 1, a rubber roll (not shown) or the like as an object to be heated is accommodated.
[0015]
The lower end of the vulcanizing can 1 is connected to the other end of the circulation path 2, and a separator 14 and a fluid circulation means 4 are sequentially arranged in the circulation path 2. The separator 14 separates condensed water generated by heating an object to be heated in the vulcanizing can 1 from compressed air and residual steam in a gas-liquid manner. Discharge to
[0016]
In this embodiment, an example in which a blower 4 is used as the fluid circulation means 4 will be described. The blower 4 sucks the mixed fluid of the compressed air and the residual steam from which the condensed water has been separated by the separator 14, and discharges the mixed fluid to the mixing container 5.
[0017]
When heating the object to be heated in the closed container 1, first, compressed air of a predetermined pressure, for example, 3.2 KG, is supplied from the compressed air supply pipe 7 to the circulation path 2 and the container 1 through the control valve 9. In this case, the blower 4 is driven to circulate the compressed air in the circulation path 2 and the container 1. When the compressed air pressure detected by the pressure sensor 10 reaches 3.2 KG, a predetermined pressure, for example, 5.0 KG of steam is supplied through the steam supply pipe 6 and the control valve 8 to the circulation path 2. 1.8 kg of steam is injected based on the pressure difference from the compressed air.
[0018]
By supplying 3.2 KG of compressed air and 1.8 KG of steam, the pressure in the circulation path 2 and the vessel 1 becomes 5.0 KG. When it reaches 5.0 KG, the supply of compressed air stops. On the other hand, the supply of steam is continuously performed so that the pressure in the circulation path 2 and the pressure in the vessel 1 are maintained at 5.0 KG, so that the temperature of the saturated steam of 1.8 KG is 130 ° C. The object to be heated in 1 is heated at 130 ° C. When an unvulcanized rubber roll is used as the object to be heated, the rubber roll is vulcanized under the conditions of 5.0 kg, a pressure of 130 ° C. and a temperature.
[0019]
If the rubber roll is vulcanized only with steam without supplying compressed air, the temperature of the steam becomes 1.8 ° C. at 130 ° C., but when the steam pressure is 5.0 kg, the steam temperature rises to 158 ° C. When the vulcanization temperature condition is 130 ° C, if the vulcanization is carried out only with steam without using compressed air, the pressure can only be increased to 1.8 KG. The vulcanized product is deformed due to expansion or heat dripping. However, in this embodiment, in order to add 3.2 KG of compressed air, the temperature condition is the same and the pressure is increased to 5.0 KG. In addition, expansion and deformation of the rubber roll can be prevented without wrapping.
[0020]
After a while, the mixed fluid of the steam and the compressed air supplied into the container 1 separates the steam and the compressed air, and the temperature in the container 1 varies greatly. By circulating and agitating the steam, the steam and the compressed air can be surely mixed and the variation in the temperature distribution in the container 1 can be made smaller.
[0021]
FIG. 2 shows another embodiment of the present invention. The same members as those in the first embodiment of FIG. 1 are denoted by the same reference numerals. In the embodiment of FIG. 2, the mixing means 3 and the fluid circulating means 4 of FIG. 1 are replaced by a steam ejector 16, and the steam ejector 16 mixes the steam and the compressed air, and circulates with the closed container 1. The mixed fluid is circulated to the passage 2.
[0022]
The steam ejector 16 is composed of a suction unit 17 having a built-in nozzle and a diffuser 18. The steam supply pipe 6 and the control valve 8 are attached by connecting to a nozzle (not shown) in the suction unit 17. The suction section 17 is connected to the compressed air supply pipe 7 with the control valve 9 interposed and the other end 19 of the circulation path 2.
[0023]
A suction force is generated in the suction unit 17 by the steam flow supplied from the steam supply pipe 6 to suck the compressed air and the residual steam from the other end 19 of the circulation path 2 and to release the compressed air from the compressed air supply pipe 7. After suction, the steam and the compressed air are mixed and supplied into the container 1 through the circulation path 2.
[0024]
In the present embodiment, an example in which the vulcanizing can 1 is used as a closed container has been described, but the present invention can be similarly applied to other steam heating devices.
[0025]
By arranging the members other than the hermetically sealed container 1 in this embodiment collectively, it can be packaged as a steam heating device.
[0026]
【The invention's effect】
According to the present invention as described above, heating is performed by maintaining a desired temperature and pressure with a mixed fluid of steam and compressed air in a closed container, thereby eliminating the need for wrapping in the case of a vulcanizing apparatus. Simplifies the vulcanization process and shortens the working time.
[0027]
By circulating and agitating the mixed fluid into the closed container by the fluid circulating means to make the temperature distribution uniform, it is possible to prevent uneven heating.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a steam heating device of the present invention.
FIG. 2 is a configuration diagram showing another embodiment of the steam heating device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Closed container 2 Circulation path 3 Mixing means 4 Fluid circulating means 5 Mixing container 6 Steam supply pipe 7 Compressed air supply pipe 8, 9 Control valve 10 Pressure sensor 11 Temperature sensor 12, 14 Separator 16 Steam ejector 17 Suction unit 18 Diffuser

Claims (1)

The object to be heated is placed in a closed container, and a heating path is supplied to the container to heat the object to be heated, and a circulation path that circulates the inside and outside of the closed container is arranged. Mixing means for mixing steam and compressed air is attached to the circulation path, and a mixed fluid of steam and compressed air is supplied from the mixing means to the closed vessel via the circulation path, and the fluid is circulated through the circulation path. A steam heating device comprising a fluid circulating means for circulating a fluid between a sealed container and a mixing means.

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