JPS6229721Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a safety device for a pressure can that undergoes high-temperature, high-pressure steam curing or vulcanization within the can.

BACKGROUND OF THE INVENTION Pressure vessels equipped with opening/closing doors are always required to open and close the doors perfectly. If the supply air pressure increases when the door is incompletely closed, or if the door is opened when there is residual pressure inside the can, it may cause an explosion, so a safety device for opening and closing the door is a very important mechanism. Conventional safety devices generally include a mechanism that mechanically detects the open/closed state of the door between the door and the container.

Problems that the invention aims to solve However, in the conventional safety device mentioned above, the mechanism for detecting the open/closed state of the door and the mechanism for supplying air into the container were each provided independently, so if the door were to be blocked, Even if it was incomplete, there was a risk that air would be supplied into the container and the pressure would increase.

The present invention proposes a safety device for a pressure canister that combines mechanical and electrical elements to ensure safe door opening and closing operations at all times.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pressure canner in which high-temperature, high-pressure steam curing or vulcanization is performed inside the can. A split-type locking ring that can be inserted and removed by expanding and contracting the diameter of the annular groove formed on the inner surface of the locking ring, and a safety inner lock that can be inserted and removed between the split end faces of the locking ring in the expanded diameter state. a lock detection device for detecting that the locking ring is fitted; a safety locking device for detecting that the safety inner lock is fitted; an air supply valve whose operation is electrically controlled; A push-button switch for confirming closing of the door, which is opened and closed by the switch, and a relay unit electrically connected to the lock detection device, the safety locking device, the front air supply valve, and the push-button switch for confirming closing of the door. , receives an electric signal transmitted from each of the lock detection device and safety locking device when the locking ring or safety inner lock is fully fitted, and receives an electric signal transmitted from the push button switch for confirming door closing to confirm that the door is closed. This mechanism allows the air supply valve to operate only when a signal is received.

Function In the above configuration, the fitting of the locking ring into the annular groove is mechanically detected by the fitting between the divided end faces of the locking ring of the safety inner lock, and the lock detection device and the safety lock Electrical signals transmitted from each device are received by a relay unit to electrically detect the device, and when both of the above detections are performed, the push button switch for confirming door closing is pressed and the air supply valve is activated. Allow.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

1 to 4, reference numeral 1 denotes a pressure canister having an annular main body flange 2 on the opening side, and a door body 3 that can open and close the main body flange 2 is provided. That is, bearings 4 are provided above and below one side of the main body flange 2,
A bracket 6 is attached to the vertical shaft 5 supported by these bearings 4.
The door body 3 is attached through the door body 3, and the door body 3 is configured to be rotatable around a vertical axis 7. The door body 3
is composed of an annular flange 8 and a mirror plate-like cover 9 attached to the front surface of the annular flange 8,
The bracket 6 is fixed to this cover 9.
Further, a locking ring 10 whose lower half is split into one is disposed on the front surface of the annular flange 8, and this locking ring 10 is prevented from falling off by a plurality of ring guides 11 from the annular flange 8.
A cylinder 12 supported by the door body 3 is disposed between the cut ends of the locking ring 10, and the locking ring 10 can be expanded or contracted in diameter by expanding and contracting the cylinder 12. A locking ring 1 with an enlarged diameter is provided on the inner surface of the tip of the main body flange 2.
An annular groove 13 is formed that allows the insertion of zero. The locking ring 10 having a reduced diameter is set to fit within the outer diameter of the annular flange 8. A lock detection device 14 is provided at a plurality of locations (three locations in the embodiment) on the outer surface of the annular flange 8 corresponding to the annular groove 13.
is provided. That is, a cylindrical body 15 is arranged radially from the outer surface of the annular flange 8, and a stopper cylindrical body 16 is fitted inside the outer end of the cylindrical body 15. Then, the rod 1 is inserted through the stopper cylinder 16.
7 is provided, and this rod 17 is connected to the main body flange 2.
The inner end thereof protrudes into the annular groove 13 through a through hole 18 formed in the annular groove 13 . Further, between the stopper cylinder 16 and the rod 17, the rod 17 is inserted into the annular groove 1.
3 is provided with a spring 19 biasing it to protrude. The outer end of the rod 17 can come into contact with the operating rod of a first limit switch 21 attached to the outer surface of the main body flange 2 via a bracket 20. In this first limit switch 21, when the locking ring 10 is contracted in diameter, as shown by the solid line in FIG. When the diameter is reached, the operating rod rises and enters the detection state. 22
indicates seal rubber. As shown in FIGS. 2 and 4, a safety locking device 23 is provided on the outer surface of the cover 9 of the door body 3. This safety locking device 2
3 includes an inner safety lock 24 that can be fitted and removed from the radial direction between the cut end faces of the locking ring 10, a lever 25 fixed to the inner end of the inner safety lock 24, and a lever 25 that is rotatably supported by the cover 9. an arm 27 fixed to the valve stem 26 and connected to the lever 25 so as to be able to swing relative to the lever 25;
6, a safety lock valve 29 on which one end of the valve stem 26 acts, a second limit switch 30 on which the other end of the valve stem 26 acts, and a fluid supply source by opening the safety lock valve 29. and a horn pipe 31 communicating with the operating lever 2.
The inner safety lock 24 engages and disengages by performing the 90 degree forward and reverse operation of step 8. When the lock is fully engaged, the second limit switch 30 enters the detection state, and when it is not completely engaged, the whistle pipe 31 is activated. Sound the horn. Then, as shown in Figure 1, both limit switches 2
1 and 30 are connected to a relay unit 32. 33
is a manually opened/closed push button switch for confirming closed door, 3
4 is a pilot lamp, 35 is a program setting device, 36 is a pressure and temperature control recorder, 37 is an air supply valve whose operation is controlled electrically, 38 is an exhaust valve, and 39 is a path for steam or pressurized hot air. , the push button switch 33 for confirming door closing is connected to the relay unit 32, and the air supply valve 37 is connected to the pressure temperature control recorder 3.
6 and a program setting device 35, it is electrically connected to the relay unit 32. and,
This relay unit 32 is a limit switch 2
1 and 30 respectively, which are transmitted when the locking ring 10 or the safety inner lock 24 is detected to be engaged, and also receive an electrical signal indicating door closing confirmation transmitted from the door closing confirmation push button switch 33. The air supply valve 37 is configured to be allowed to operate only when this occurs.

The operation of the above-mentioned structure will be described below. First, the locking ring 10 is contracted (retracted) as shown by the solid line in Fig. 2, and the safety lock 24 is raised as shown by the solid line in Fig. 4, and the door body 3 is opened and closed in this state. Then, when the door body 3 that has been opened is first closed manually, the cylinder 1
2 is extended to expand (stretch) the locking ring 10 as shown by the imaginary line in FIG. 3, and the upper periphery of the ring is fitted into the annular groove 13.
8 is manually operated to lower the safety lock 24, and the fourth
As shown by the solid line in the figure, the door body 3 is fitted between the locking ring 10. As a result, the locking of the door body 3 is completed and the fitting of the locking ring 10 into the annular groove 13 is mechanically detected. When this locking is completed, both limit switches 21 and 30
are operated, and both electrical signals are sent to the relay unit 3
2, electrically confirming that the door is completely locked. Then, after a site worker confirms that the door is closed and the surrounding safety conditions, he operates the door-close confirmation push button switch 33. By operating this door-close push button switch 33, an electrical signal indicating that the door is closed is transmitted to the relay unit 32, and the relay unit 32 is permitted to operate the air intake valve 37.
Then, the ready-to-operate pilot lamp 34 lights up to indicate the completion of all door closing operations. Therefore, if the locking ring 10 is not completely fitted to the bottom of the annular groove 13, the safety lock 24 cannot be inserted between the ends of the locking ring 10, so that the incomplete fitting of the locking ring 10 is mechanically detected.
If the locking ring 10 is not fully fitted or the safety inner lock 24 is not fully inserted, no electrical signal is transmitted to the relay unit 32, providing a double safety mechanism that does not permit the operation of the air intake valve 37 in the relay unit 32. Also, since the safety locking valve 29 does not close completely in the above state, if air is supplied, steam will blow out from the whistle pipe 31, sounding the whistle and informing the user that the lock is not fully locked. This activates the double safety mechanism,
It prevents pressure build-up when the door is not completely closed, and prevents unexpected explosions.

Effects of the invention As described above, according to the invention, safety is mechanically checked by combining mechanical and electrical elements, and the air supply valve is not allowed to operate if the door is incompletely closed. Therefore, since it is impossible to increase the pressure, it is possible to provide a double-safety type safety device, which prevents the pressure from increasing due to incomplete door closing operation, and prevents unexpected explosion accidents such as explosions caused by opening the door. can.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a schematic illustration, FIG. 2 being a front view of the pressure canister, and FIG.
4 is a front view of the main part, and FIG. 5 is a cross-sectional view of FIG. 4. DESCRIPTION OF SYMBOLS 1... Pressure canister, 2... Main body flange, 3... Door body, 8... Annular flange, 9... Cover, 10...
... Locking ring, 13 ... Annular groove, 14 ...
Lock detection device, 21...first limit switch, 23...safety locking device, 24...safety inner lock,
29... Safety lock valve, 30... Second limit switch, 31... Horn pipe, 32... Relay unit, 33... Push button switch for confirming door closing, 37...
Air supply valve.

Claims (1)

[Scope of utility model registration request] In pressure canisters that undergo high-temperature, high-pressure steam curing or vulcanization inside the can, a ring-shaped groove is provided on the door of the pressure can and formed on the inner surface of the opening of the main body of the pressure can, and is fitted and removed by expanding and contracting the diameter. a split-type locking ring that can be split, and a safety inner lock that can be inserted and removed in the expanded diameter state between the split end faces of the locking ring;
a lock detection device that detects that the locking ring is fitted; a safety locking device that detects that the safety inner lock is fitted; an air supply valve whose operation is electrically controlled; a push button switch for confirming door closure; a relay unit electrically connected to the lock detection device, the safety locking device, the front air supply valve, and the push button switch for confirming door closure; It receives the electric signal transmitted when the locking ring or safety inner lock is completely fitted from each of the detection device and safety locking device, and also receives the electric signal indicating confirmation of door closing transmitted from the push button switch for confirming door closing. A safety device for a pressure canister, characterized in that it is configured to permit the operation of an air supply valve only when a signal is received.