JP4241008B2 - Steam heating device - Google Patents

Description

[0001]
BACKGROUND 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 with a fluid mixture of steam and compressed air.
[0002]
[Prior art]
[Patent Document 1]
This is related to a rubber roll vulcanization method. A rubber raw material is rolled into a sheet, laminated around a core material, and then the surface is wrapped with a film sheet or cloth tape. It is vulcanized with hot steam.
[0003]
[Problems to be solved by the invention]
In the above conventional one, after the worker wraps and vulcanizes the film sheet around the rubber roll, the worker has to remove the film sheet again, which complicates the work process and takes time for the work process. There was a problem that needed.
[0004]
The reason for wrapping the unvulcanized rubber is to prevent the rubber from expanding during vulcanization or being deformed by heat dripping.
[0005]
Therefore, the object of the present invention is to make it possible to arbitrarily adjust the pressure and temperature of the mixed fluid of steam and compressed air as a heating source, eliminate the need for wrapping, simplify the heating process for vulcanization, and reduce the working time. It is to obtain a steam heating device that can be shortened.
[0006]
[Means for Solving the Problems]
The means taken to solve the above-mentioned problems is that the heated object is placed in a sealed container and the heated object is heated by supplying steam for heating in the sealed container. A circulation path that circulates inside and outside is arranged, a mixing means for mixing steam and compressed air is attached to the circulation path , a steam supply pipe and a compressed air supply pipe are connected to the mixing means, and each supply A control valve capable of adjusting the supply amount is attached to the pipe, and the partial pressure of the steam and the compressed air is arbitrarily controlled by the control valve to supply the mixed fluid of the steam and the compressed air into the sealed container. A fluid circulation means for circulating the fluid in the circulation path is arranged to circulate the fluid between the sealed container and the mixing means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
When supplying the mixed fluid of steam and compressed air from the mixing means into the sealed container, by adjusting the partial pressure of the steam and compressed air, respectively, it can be supplied into the container as a mixed fluid of any pressure or temperature, An 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]
The steam pressure is adjusted to set the steam temperature to a predetermined value suitable for heating, and the sum of the partial pressures of the steam and compressed air is set to a predetermined pressure that does not cause deformation due to expansion or dripping of rubber during vulcanization, for example. By setting, heating can be performed without wrapping.
[0010]
By arranging the fluid circulation means in the circulation path, the mixed fluid of steam and compressed air is circulated from the mixing means to the inside of the sealed container and again from the mixing means to the inside of the sealed container, thereby ensuring the steam and compressed air. Mixing and stirring can be performed, and by making the entire inside of the sealed container have a uniform temperature distribution, temperature unevenness can be prevented and the entire object to be heated can be heated uniformly.
[0011]
【Example】
A first embodiment is shown in FIG. In FIG. 1, a vulcanizing can 1 as a sealed 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. To do.
[0012]
The mixing means 3 is formed by connecting a steam supply pipe 6 and a compressed air supply pipe 7 to a horizontally long mixing container 5, and each supply pipe 6, 7 has a control valve 8, which can adjust the supply amount. 9 is attached.
[0013]
The mixing container 5 and the sealed container 1 are connected by a 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. Each sensor 10 and 11 is electrically connected to the actuator part of the control valves 8 and 9 via a controller (not shown). The control valves 8 and 9 can control the respective partial pressures arbitrarily by adjusting the passage amount of steam and compressed air by increasing or decreasing the valve opening.
[0014]
On the inlet side of the vulcanizing can 1 as a hermetic container, a separator 12 is attached for separating the condensed condensate of steam existing in the circulation path 2 from steam and compressed air. Connected to the lower part of the separator 12 is a steam trap 13 that discharges only the condensate separated into gas and liquid to the outside. Inside the vulcanizing can 1, a rubber roll (not shown) as an object to be heated is accommodated.
[0015]
The other end of the circulation path 2 is connected to the lower part of the vulcanizing can 1, and the separator 14 and the fluid circulation means 4 are sequentially arranged in the circulation path 2. The separator 14 separates the condensate generated by heating the object to be heated inside the vulcanizing can 1 from the compressed air and the residual steam, and the condensate is externally supplied from a steam trap 15 connected to the lower part. To discharge.
[0016]
In this embodiment, an example using the blower 4 as the fluid circulation means 4 is shown. The blower 4 sucks the mixed fluid of compressed air and residual steam from which the condensate has been separated by the separator 14 and discharges it to the mixing container 5.
[0017]
When heating an object to be heated in the sealed container 1, first, a 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, subsequently, a predetermined pressure, for example, 5.0 KG of steam is supplied to the circulation path 2 through the steam supply pipe 6 and the control valve 8. Is injected with 1.8KG steam based on the pressure difference with the compressed air.
[0018]
By supplying the compressed air of 3.2 KG and the steam of 1.8 KG, the pressure in the circulation path 2 and the container 1 becomes 5.0 KG. When it reaches 5.0 KG, the supply of compressed air stops. On the other hand, since the steam is continuously supplied so that the pressure in the circulation path 2 and the container 1 is maintained at 5.0 KG, the saturated steam temperature 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, this rubber roll is vulcanized under conditions of 5.0 KG, 130 ° C. pressure and temperature.
[0019]
When the rubber roll is vulcanized only with steam without supplying compressed air, the steam temperature rises to 130 ° C. with 1.8 KG steam, but the steam temperature rises to 158 ° C. when the steam pressure is 5.0 KG. When the temperature condition of vulcanization is 130 ° C., if vulcanization is performed only with steam without using compressed air, the pressure can only be increased to 1.8 KG. Although the vulcanized product is deformed due to expansion or dripping, in this embodiment, since 3.2 KG of compressed air is added, the temperature conditions are the same and the pressure is increased to 5.0 KG. The rubber roll can be prevented from expanding and deforming without wrapping.
[0020]
When the mixed fluid of steam and compressed air supplied into the container 1 passes for a while, the steam and compressed air separate and the temperature in the container 1 varies greatly. By circulating and stirring the steam, the steam and the compressed air can be reliably 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 shown in FIG. In the embodiment of FIG. 2, the mixing means 3 and the fluid circulation means 4 of FIG. 1 are replaced by a steam ejector 16, and the steam ejector 16 mixes steam and compressed air, and circulates with the sealed container 1. The mixed fluid is circulated through the passage 2.
[0022]
The steam ejector 16 is composed of a suction portion 17 and a diffuser 18 incorporating a nozzle. A steam supply pipe 6 and a control valve 8 are attached to a nozzle (not shown) in the suction unit 17. The suction part 17 is connected to the compressed air supply pipe 7 with the adjustment valve 9 interposed therebetween and the other end 19 of the circulation path 2.
[0023]
A suction force is generated in the suction portion 17 by the steam flow supplied from the steam supply pipe 6, and compressed air and residual steam are sucked from the other end 19 of the circulation path 2, and compressed air is supplied from the compressed air supply pipe 7. By sucking, 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 sealed container has been shown, but it can also be used for other steam heating devices.
[0025]
By arranging the members other than the sealed container 1 in the present embodiment together, it can be packaged as a steam heating device.
[0026]
【The invention's effect】
As described above, according to the present invention, heating is carried out without wrapping in the case of a vulcanizer by maintaining and heating a sealed container with a mixed fluid of steam and compressed air at an arbitrary temperature and pressure. This simplifies the vulcanization process and reduces the work time.
[0027]
By circulating and stirring the mixed fluid into the hermetic container with the fluid circulation means, the temperature distribution is made uniform, so that uneven heating can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a steam heating apparatus according to the present invention.
FIG. 2 is a configuration diagram showing another embodiment of the steam heating apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sealed container 2 Circulation path 3 Mixing means 4 Fluid circulation 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 part 18 Diffuser

Claims (1)

Place the object to be heated in a sealed container, and supply the heating steam into the container to heat the object to be heated. A mixing means for mixing steam and compressed air is attached to the circulation path, a steam supply pipe and a compressed air supply pipe are connected to the mixing means, and an adjustment valve capable of adjusting the supply amount to each supply pipe is provided. A fluid circulation means is installed to circulate the fluid in the circulation path as well as to supply the mixed fluid of steam and compressed air into the sealed container by arbitrarily controlling the partial pressure of the steam and compressed air with the control valve. And a steam heating device characterized by circulating a fluid between the sealed container and the mixing means.

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