JPH0412326Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a steam generator that generates cleaning steam for use in cleaning equipment for cleaning mechanical parts, medical instruments, and various other objects. In particular, the purpose of this invention is to make the steam generation tank that constitutes this steam generation device airtight under appropriate pressure, and to downsize the steam generation tank.

BACKGROUND TECHNOLOGY Conventionally, a steam generation chamber in a steam generation tank that constitutes a steam generation device is generally closed by the weight of a lid, or tightly closed by screwing the lid, etc., to prevent leakage of cleaning steam. is prevented. However, in the former case, leakage prevention is not sufficient and when the generated steam pressure increases, water leaks from the gap in the lid contact area.
Alternatively, the lid can be pushed up to allow cleaning steam to enter the cooling chamber above the steam generation chamber. Then, the cleaning steam that has entered is cooled and condensed in the cooling chamber and disappears, resulting in insufficient supply pressure of cleaning steam to be supplied to the steam cleaning chamber. For this reason, in the conventional steam generation tank, the height of the steam generation chamber must be set approximately to the height of the steam cleaning chamber, which poses a problem in that the steam generation tank becomes large.

In addition, if the lid is fixed mechanically like the latter, it is possible to prevent leakage of cleaning steam, but when the steam pressure rises abnormally, there is no place for the cleaning steam to escape, so the steam generation tank etc. There was a danger that this could cause an explosion.

Problems to be Solved by the Invention This invention attempts to solve the above-mentioned problems by preventing explosion accidents caused by leakage of cleaning steam from the steam generation chamber and abnormally high steam pressure.
Furthermore, it is an attempt to downsize the steam generation tank.

Means for solving the problems In order to solve the problems mentioned above, the present invention
The steam cleaning tank is equipped with a piping system that guides the generated cleaning steam to the steam cleaning chamber of the cleaning tank, and the inner wall of the steam generating tank is provided with an annular groove for accommodating the closing liquid. An inner cover is mounted that partitions the lower space of the annular groove into a steam generation chamber connected to the piping system, and the upper space into a cooling chamber. The bent lower end surface is inserted into the closing liquid of the annular groove.

Function Since the present invention is constructed as described above, in order to carry out steam cleaning, the cleaning steam generated in the steam generation chamber is introduced into the steam cleaning chamber through the piping system, and this cleaning steam is transferred into the steam cleaning chamber. It can be filled with water and come into contact with the object to be cleaned to perform steam cleaning. When this steam is introduced, the steam generation chamber and the cooling chamber are separated by an inner lid, and the bent lower end surface of the inner lid is inserted into the closing liquid in the annular groove. The airtightness of the cooling chamber is sufficiently increased. As a result, the generated cleaning steam can be introduced into the steam cleaning chamber without waste, and the cleaning steam can be sent to a much higher position than the formation height of the steam generation chamber, making it possible to use it even in large, tall steam cleaning chambers. , the cleaning steam can be supplied by a small device. In addition, even if the steam pressure becomes abnormally high for some reason during steam cleaning, this abnormal pressure will push up the inner lid and the cleaning steam will hit the bent lower end surface of the inner lid and close the annular groove. Since the steam is blown out into the cooling chamber through the gap with the liquid surface and condensed into liquid, the pressure in the steam generation chamber is prevented from rising, and an explosion accident due to abnormally high pressure is prevented.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a cleaning tank, the lower part of which contains a suitable cleaning liquid 2 such as trichlorethylene, and a liquid cleaning tank 3.
The space above the liquid cleaning tank 3 is
This is a steam cleaning room 4. A cleaning table 6 on which an object to be cleaned 5 is placed is inserted into the cleaning tank 1 so as to be vertically movable. This washing stand 6 is the washing tank 1
In conjunction with the lifting cylinder 7 located outside the
It is fixed to the lower end of a vertically movable body 8 that moves vertically within the cleaning tank 1 and will be described later. A push-up frame 11 for pushing up the lid 10 protrudes from the upper surface.

Further, next to the cleaning tank 1, an independent steam generation tank 12 is arranged which is separated and isolated from the cleaning tank 1. An annular groove 13 is provided around the inner wall of the steam generating tank 12 at a substantially intermediate position, and a closing liquid 14, which is the same as the cleaning liquid, is accommodated in the annular groove 13. The top surface of an inner lid 15 having a U-shaped cross section is placed on the upper end surface of the inner wall of the annular groove 13, and the bent lower end surface 9 of the inner lid 15 is inserted into the closing liquid 14 of the annular groove 13. There is. In this way, by fitting the inner cover 15 into the annular groove 13, the internal space of the steam generation tank 12 is divided into a steam generation chamber 16 and a cooling chamber 17. A heater 18 is located at the bottom side of the steam generation chamber 16, and this heater 18 is immersed in a cleaning liquid 20. A cooling coil 21 through which cooling water flows is located on the inner circumferential side of the cooling chamber 17 , and pushes up the inner lid 15 from the steam generation chamber 16 to connect the bent lower end surface 19 of the inner lid 15 and the annular groove 13 .
Steam leaking through the gap between the closing liquid 14 and the closing liquid 14 is condensed and liquefied by cooling. Note that the upper surface of the cooling chamber 17 is hermetically sealed by screwing an outer cover 19. In addition, steam generation chamber 1
6 includes a steam introduction pipe 22 as a piping system extending near the inner lid with its opening facing upward, and an overflow pipe 23 with one end inserted into the cleaning liquid 20.
is inserted, and the tip of the steam introduction pipe 22 is
It is connected via a valve 24 to a steam introduction opening 25 provided in the lower part of the steam cleaning chamber 4, that is, in the cleaning section, and the tip of the overflow pipe 23 is connected to the cleaning liquid 2
Overflow port 26 provided slightly above the liquid level of
It is connected to the.

By the way, in the upper half of the inner peripheral part of the steam cleaning chamber 4, that is, in the cooling section, there is a cooling coil 3 through which cooling water flows.
0 is located. Further, the steam cleaning chamber 4 and the liquid cleaning tank 3 communicate with each other via a moisture separator 31, which separates the liquid condensed by the cooling of the cooling coil 30 into moisture and cleaning liquid, and only removes the cleaning liquid. is returned to the liquid cleaning tank 3. On the other hand, the upper surface of the steam cleaning chamber 4 is an opening 27 for lifting the object to be cleaned 5, and this opening 27 is connected to a lid 10 that is movable up and down.
is closed by its own weight. Further, the upper part of the lid body 10 is covered by a hood 32, and a mounting table 35 is formed at an entrance/exit 34 provided with a shutter (not shown).

In the structure as described above, if the object to be cleaned 5 is placed on the cleaning table 6 which can be moved up and down by the lifting cylinder 7 and inserted into the liquid cleaning tank 3,
Liquid cleaning can be performed using the cleaning liquid 2. After this liquid cleaning, the cleaning table 6 is raised by the lift cylinder 7, the object to be cleaned 5 is placed in the steam cleaning chamber 4, and steam cleaning is performed.

To perform this steam cleaning, first the steam generation tank 12
drive the heater 18 to heat the cleaning liquid 20;
Cleaning steam 36 is generated within the steam generation chamber 16.
This cleaning steam is generated with the valve 24 closed, and when the steam generation chamber 16 is filled with the cleaning steam 36, the valve 24 is opened and the cleaning steam 36 is passed through the steam introduction pipe 22 into steam. It is introduced into the steam cleaning chamber 4 through the introduction opening 25. By introducing this steam, the cleaning steam 36 fills the steam cleaning chamber 4 and comes into contact with the object to be cleaned 5 to perform steam cleaning. When introducing this steam, the steam generation chamber 16
The cooling chamber 17 is partitioned by the inner lid 15, and the bent lower end surface 9 of the inner lid 15 is inserted into the closing liquid 14 in the annular groove 13.
The airtightness of the steam generation chamber 16 with respect to the cooling chamber 17 is sufficiently increased. As a result, the generated cleaning steam 36 can be introduced into the steam cleaning chamber 4 without waste, and the cleaning steam 36 can be sent out to a position much higher than the height at which the steam generation chamber 16 is formed.
Cleaning steam can also be supplied to a large steam cleaning chamber 16 with a large height using a small device.

Next, after the steam cleaning is completed, the valve 24 is closed to stop introducing the cleaning steam 36 into the steam cleaning chamber 4. On the other hand, since the cleaning steam 36 remaining in the steam cleaning chamber 4 is condensed and liquefied by the cold air of the cooling sile 30, the cleaning steam 36 in the steam cleaning chamber 4 disappears and the cooling coil 3
The object to be cleaned 5 can be cooled and dried by the cold air of zero.

After this cooling and drying is completed, the lifting cylinder 7 is operated to raise the cleaning table 6, thereby preventing the cleaning steam 36 from flowing out to the outside of the lid 10.
is pushed up and opened by the push-up frame 11, a shutter (not shown) is opened, and the object to be cleaned 5 is taken out from the entrance 34 onto the mounting table 35.
In this case, as described above, the cleaning steam 36 in the steam cleaning chamber 4 has disappeared through condensation and liquefaction, so even if the lid 10 is pushed up, no cleaning steam will come out. Even if the steam 36 remains without being liquefied, the specific gravity of the cleaning steam 36 is greater than that of air, so the residual cleaning steam 36
6 will accumulate below the steam cleaning chamber 4,
There is no leakage to the outside from the elevator opening of the steam cleaning chamber 4.

After taking out the object 5 to be cleaned, the next object 5 to be cleaned is inserted through the entrance/exit 34 and placed on the washing table 6, and when the lifting cylinder 7 is lowered, the object 5 to be cleaned is transferred to the liquid cleaning tank 3. The lid body 10 is inserted into the
closes the elevator opening of the steam cleaning chamber 4 and removes the cleaning steam 3.
6 from leaking to the outside.

As described above, according to this embodiment, the steam generation chamber 16 of the steam generation tank 12 is made airtight by the inner lid 15 via the sealing liquid 14, so its airtightness is high and normal operation of steam cleaning is possible. In this state, no cleaning vapor 36 leaks into the cooling chamber 17. In this way, since the airtightness of the steam generation chamber 16 can be improved, the internal pressure of the steam generation chamber 16 can be increased accordingly.
Even if the position of the steam introduction pipe 22 in the steam cleaning chamber 6 is sufficiently lower than the position of the steam introduction opening 25 of the steam cleaning chamber 4,
The cleaning steam 36 can be introduced into the steam cleaning chamber 4 from the steam generation chamber 16 without any hindrance. In other words, even if the steam generation chamber 16 is sufficiently lower than the steam cleaning chamber 4, the cleaning steam 36 can be introduced, which allows the height of the steam generation tank 12 to be lowered and downsized. Since the airtightness is improved, all of the cleaning steam generated in the steam generation chamber 16 can be introduced into the steam cleaning chamber 4 without leaking to others, making the energy consumption for steam generation extremely efficient and economically advantageous. It is.

Furthermore, during steam cleaning, if the steam generation chamber 16 becomes abnormally high pressure for some reason,
Alternatively, if the steam generation chamber 16 becomes abnormally high pressure for some reason when the valve 24 is closed after cleaning is completed, the inner lid 15
is pushed up, and the cleaning steam 36 blows out into the cooling chamber 17 through the gap between the bent lower end surface 9 of the inner lid 15 and the surface of the closing liquid 14 of the annular groove 13, condensing and liquefying the steam. A pressure rise in the generation chamber 16 is prevented, and an explosion accident due to abnormally high pressure is prevented.

In the above embodiment, an embodiment of the steam generator was described together with the cleaning tank 1 for the object to be cleaned 5, but the configuration of the cleaning tank 1 can be selected from any form depending on the purpose of cleaning. This can be connected and used.

Effects of the invention Since the invention is configured as described above, the pressure inside the steam generation chamber is adjusted to a nearly constant state at an appropriate pressure state, and cleaning steam is removed from the outside due to pressure fluctuations or pressure rises in the steam generation chamber. The danger of leakage or explosion of the device is reliably prevented, and since the steam generation chamber can be made airtight, there is an advantage that the device of the present invention can be sufficiently miniaturized.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a sectional view showing a state in which the steam generating chamber is connected to a steam cleaning device, and FIG. 2 is a sectional view showing a state in which the steam generation chamber is closed. 4... Steam cleaning room, 12... Steam generation tank, 13
... annular groove, 14 ... closing liquid, 15 ... inner lid,
16... Steam generation chamber, 17... Cooling room, 21...
Cooling coil, 22... Steam introduction pipe (piping system), 2
7... Lift opening, 28... Steam circulation gap, 36...
cleaning steam.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A piping system is provided in the steam cleaning tank to guide the generated cleaning steam to the steam cleaning chamber of the cleaning tank, and the inner wall of this steam generating tank has an annular groove for storing a closing liquid. An inner cover is placed on the annular groove, which partitions the lower space of the annular groove into a steam generation chamber connected to the piping system, and the upper space into a cooling chamber. 1. A steam generator characterized in that, when the inner cover is placed, a bent lower end surface of the inner cover is inserted into a closing liquid in an annular groove. (2) The scope of the utility model registration claim, characterized in that the bent lower end surface of the inner lid is inserted into the closing liquid with a gap that can form a vapor flow gap from the lower bottom surface of the annular groove. Steam generator described in paragraph (1). (3) The steam generator according to claim (1) of the utility model registration, characterized in that a cooling coil through which cooling water flows is located in the inner circumference of the cooling chamber. (4) The steam generating device according to claim (1) of the utility model registration, characterized in that a liquid cleaning tank for cleaning with a cleaning liquid is provided below the steam cleaning chamber. (5) The steam cleaning chamber according to claim 1, wherein the upper surface of the steam cleaning chamber is open, and the upper surface opening is closed by the weight of a vertically movable lid. Generator. (6) The steam generating device according to claim (4) of the utility model registration, characterized in that the upper opening of the steam cleaning chamber also serves as an opening for raising and lowering the object to be cleaned. (7) The lid body is moved up and down by protruding a push-up frame onto a washing stand on which the object to be cleaned is placed, and by connecting an elevating cylinder located outside the steam cleaning chamber to the washing stand. A steam generator according to claim (4) of the utility model registration claim.