JP2588902Y2 - Lifting magnet loading lid suction detector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the suction of a lid for a lifting magnet.

[0002]

2. Description of the Related Art In a coke oven, a charging lid is released from suction by a lifting magnet to open and close a charging port. However, for automatic operation and safety, after the charging port is opened, other operations are performed. In doing so, it is necessary to reliably detect whether or not the charging lid has been attracted by the magnet.

Conventionally, for such detection, a limit switch is provided at the edge of the suction surface on the lower surface of the lifting magnet,
When the charging lid is sucked, the switch is closed mechanically,
A device that detects the suction of the lid or a device that detects the suction of the lid by using a sensor provided with an air sensor at the edge of the suction surface of the lower surface of the circular lifting magnet and the like is used in practice. Kaihei 4-328192
No.).

[0004]

An invention is the way, the lid of the conventional charging <br/> port, as shown in FIG. 7, the recess 24d in the upper central portion
A hook 26 for hanging is provided in the recess 24d, and a tapered portion 24a indicated by an imaginary line in the figure is provided on the upper surface of the outer peripheral edge portion. Wider taper 24c with improved sealing
The charging lid 24 provided with is now used. When the lid 24 having such a tapered portion 24c is attracted by the former lifting magnet, the limit switch on the edge of the magnet is located near the tapered portion 24c, so that the switch is mechanically and reliably held. There is a problem that the shutter cannot be closed and the suction of the charging lid 24 cannot be detected. In addition, if only the lifting magnet is rotated by the rotation of the lid by the lifting magnet to cut off the seal portion after suction, the detection lever (limit switch) is located at the edge of the suction surface, so that the detection lever is easily damaged by the rotation. There is a problem.

In the latter lifting magnet, when the air sensor is located at a position corresponding to the tapered portion 24c of the lid 24, the sensor cannot contact the charging lid 24, and in this case, the suction of the lid 24 Cannot be detected. Also, when a sealing material adheres to the upper surface of the lid 24,
The airtightness of the air sensor cannot be obtained with the sealing material,
Reliable detection is not possible.

Further, even if the air sensor is provided corresponding to the flat upper surface portion 24b of the lid 24, if the displacement between the lifting magnet and the loading lid 24 occurs in the left-right direction or the front-rear direction, the sensor may be displaced. Is displaced from the flat portion 24b of the lid 24, and the suction cannot be detected. In order to prevent this, it is necessary to provide a plurality of sensors (for example, four at equal intervals around the magnet).
There is a problem that the structure becomes complicated.

SUMMARY OF THE INVENTION In view of these conventional problems, the present invention is to provide a lifting magnet loading lid suction detecting device which can reliably detect the suction of the loading lid with a simple structure regardless of the shape of the loading lid. With the goal.

[0008]

According to the present invention, in order to solve the above-mentioned problems, firstly, the upper surface of the charging lid of the coke oven is magnetically attracted by the lower adsorbing surface, and the attraction of the lid is detected. In the lifting magnet loading lid suction detection device, a detection rod is provided slidably in the vertical direction at the center of the suction surface of the lifting magnet, and a plurality of detection bars extending along the suction surface from the lower end of the rod are provided. The detection rod is urged downward by the urging means together with the detection bar, and the lower surface of the detection bar is disposed at a position slightly lower than the suction surface as a contact surface to the upper surface of the charging lid, Further, the upper end of the detection rod in the lifting magnet
Switch means for detecting upward sliding and downward sliding return of the detecting rod based on the contact between the detecting bar held so as to correspond to the contact pin and the upper surface of the loading lid. A lifting magnet loading lid suction detecting device, wherein the detecting bar is a cross-shaped detecting bar extending in the radial direction of the suction surface. 2. The lifting device according to claim 1, wherein Thirdly, the magnet loading lid suction detecting device is characterized in that a groove is formed along the detection bar on the suction surface, and an upper half portion of the detection bar is located in the groove. 4. The charging lid suction detecting device according to 1 or 2, wherein fourthly, the switch means detects downward sliding of the detecting rod accompanying detachment of the charging lid from the lifting magnet. The first or Instrumentation Nyufuta adsorption detector of lifting magnet according, is formed using the.

[0009]

The lifting magnet is lowered from the state where the lifting magnet is positioned above the loading lid, and the suction surface of the lower surface of the magnet is magnetically attracted to the upper surface of the loading lid.
At this time, since the contact surface on the lower surface of the detection bar is slightly lower than the suction surface of the lifting magnet,
The upper surface of the loading lid comes into contact with the contact surface on the lower surface of the detection bar, and is pushed into the contact surface while contacting with the suction surface.

When the detection bar is pushed upward by the upper surface of the loading lid, the detection rod is slid upward together with the detection bar, and switch means provided corresponding to the sliding direction of the rod. Detects such sliding and operates to detect that the loading lid has been attracted to the lifting magnet. Since the detection bar extends along the suction surface from the suction surface center, even if a recess is formed at the center of the loading cover upper surface corresponding to the suction surface center, the detection lid upper surface The detection bar can be pushed in by the flat portion, and the suction can be reliably detected. In addition, even if a tapered portion or the like is formed on the peripheral edge of the upper surface of the loading lid, the detection bar at the center of the suction surface can contact the central portion of the loading lid, so that the suction of the loading lid can be detected without any influence.

Further, even if there is a shift in the left-right or front-rear direction between the suction surface of the lifting magnet and the loading lid, any one of the detection bars can contact the upper surface of the loading lid at the time of the suction. Since the rod can be slid upward, the suction can be reliably detected by the switch means.

In addition, when the loading lid is detached, the operation is performed in a reverse procedure to the above operation by turning off the magnetism, and the detachment of the loading lid can be detected by the switch means. The detection bar is located at the center of the lifting magnet, and the detection bar is guided by the groove. Therefore, even if the rotation of the magnet alone occurs, the detection bar is not damaged.

[0013]

1 is a side sectional view of a device for detecting a loading magnet for a lifting magnet according to the present invention, and FIG. 2 is a bottom view of the device. In this figure, reference numeral 11 denotes a lifting magnet, which excites an internal magnet 12 to lower a flat portion 24 on an upper surface of a loading lid 24 from a suction surface 13 on a lower surface.
b is adsorbed. A through hole 14 is provided in the center of the magnet 11 so as to penetrate in the vertical direction. The through hole 14 has a detection rod housing hole 14a whose diameter gradually decreases from the lower surface to the upper surface, and a through hole 14a. The limit switch housing hole 14b communicates with the hole 14a and opens on the upper surface. The suction surface 13 is composed of an outer annular suction surface 13a on the outer periphery and a central suction surface 13b formed at an inner center portion via an annular groove portion 15. The center portion of the center suction surface 13b accommodates the detection rod. It communicates with the hole 14a.

Reference numerals 16a to 16d denote the central suction surface 13b.
And a cross-shaped groove formed therein, in which a cross-shaped detection bar described later is housed and arranged. Reference numeral 18 denotes a detection rod inserted and arranged via the coil spring 17 in the detection rod storage hole 14a. The rod 18 is screwed into a male screw portion 18a (see FIG. 3) located in the storage hole 14b from the storage hole 14b side, thereby being prevented from falling off in the direction of arrow A by the nut 19 and the spring 17 is slidably provided in the directions of arrows A and B while being urged in the direction of arrow A by 17. In the male screw portion 18a of the rod 18, a contact pin 18c that can contact a switch portion 23a of a limit switch 23 described later is provided in a state urged by a coil spring 20 in the direction of arrow B.

At the lower end of the rod 18, a cross-shaped detection bar 21 composed of detection bars 21a to 21d extending along the cross-shaped grooves 16a to 16d from the lower opening position of the detection rod storage hole 14a. Is fixed.
Each of the detection bars 21a to 21d is disposed at a position where the contact surfaces 21a 'to 21d' on the lower surface project slightly below the central suction surface 13b (see FIG. 6). At the time, the contact surface 21 is
It is configured to be pushed into the grooves 16a to 16d against the spring 17 until a ′ to 21d ′ are at the same plane position as the central suction surface 13b.

Reference numeral 22 denotes the limit switch housing hole 14b.
A switch holding portion fixed to the inside of the sensor rod and holding the limit switch 23. The limit switch 23 has a switch portion 23a having a contact pin 18 at an upper end of the detection rod 18.
and is fixedly held by the holding portion 22 so as to correspond to c. Reference numeral 24 denotes the charging lid for opening and closing the charging port 25 of the coke oven, and a tapered portion 24e is provided on the lower peripheral edge along a tapered portion 25a of the opening peripheral edge of the charging port 25,
A tapered portion 24c opposite to the tapered portion 25a is provided on the periphery of the upper surface side flat portion 24b, and gas from the inside of the furnace is sealed by a sealing material 27. A concave portion 24d is provided at the center of the flat portion 24b of the lid 24,
A hanging hook 26 is mounted in the recess 24d.

The present invention is constructed as described above. When the loading lid 24 is attracted by the lifting magnet 11, the lifting magnet 11 is moved above the loading lid 24 while the magnet 12 is excited. Then, the magnet 11 is lowered at a position where the outer annular suction surface 13a corresponds to the flat portion 24b of the lid 24.

Then, each contact surface 2 of the cross detection bar 21
1a 'to 21d' come into contact with the flat portion 24b of the loading lid 24, and the detection bar 21 is pushed in the direction of arrow B against the urging force of the spring 17, and the respective contact surfaces 21 of the bar 21
a ′ to 21d ′ are in the same plane position as the central attracting surface 13b, that is, the central attracting surface 13b of the magnet 11 is in a state where the detection bars 21a to 21d are pushed into the cross-shaped grooves 16a to 16d. And annular suction surface 13a
By this, the flat portion 24b of the lid 24 can be sucked (see the position a of the lid 24 indicated by a dashed line in FIG. 1).

At this time, since the detection rod 18 is pushed in the direction of arrow B via the cross-shaped detection bar 21 and slides in the same direction, the contact pin 18c at the upper end of the detection rod 18 moves the switch portion 23a of the limit switch 23. When the switch is pressed and the switch is turned on, the suction of the loading lid 24 can be detected. In this case, even if a concave portion 24 d is formed in the center of the loading lid 24, since the detection bar 21 extends in a cross shape in the radial direction of the suction surface 13, the detection bar 21 extends in the flat portion 2.
4b is reliably brought into contact with and pushed in, and adsorption can be detected.

The state in which the lifting magnet 11 is displaced in the left-right direction or the front-rear direction with respect to the center of the loading lid 24 (the position B of the lid 24 shown by a virtual line in FIG. Even if the lid 24 is sucked with the lid 24 shown by a line, each contact surface 21 of the cross-shaped detection bar 21
Since a ′ to 21d ′ reliably contact the flat portion 24b of the lid 24, even if there is a concave portion 24d at the center of the loading lid 24 and a tapered portion 24c at the peripheral edge, the suction is reliably performed without any influence. Can be detected.

When the displacement is large, the flat portion 24b on the upper surface of the loading lid 24 contacts a part of the detection bar 21 (for example, only the detection bars 21a and 21d).
Even when 1 receives an obliquely upward force, the detection rod 18 slides in the arrow B direction along the storage hole 14a while being positioned in the vertical direction by the inner surface of the detection rod storage hole 14a. In addition, the limit switch 23 can be reliably turned on by the contact pin 18c, and there is no hindrance to the suction detection.

[0022] In the case of withdrawal of instrumentation Nyufuta 24, instrumentation Nyufuta 24 by cutting the magnetism away from the lifting magnet 11, the detection bar 21a to 21d is a coil spring 1
By the urging force of 7 to return to Shomoto lower position than the suction face 13 of the lifting magnet 11. In addition, the lower return of the detection rod 18 causes the limit switch 2 to return.
3 detects detachment of the lid 24.

[0023]

As described above, according to the present invention, the suction of the loading lid is detected by the detection bar provided along the suction surface of the lifting magnet. Even if the charging lid is formed or the charging lid has a tapered portion formed on the periphery of the upper surface, the suction of the charging lid can be reliably detected without any problem.

[0024] Even if a displacement in the left-right or front-rear direction occurs between the attraction surface of the magnet and the upper surface of the loading lid during the attraction, any of the detection bars can come into contact with the loading lid and the detection rod can be detected. Can be slid, and even if there is such a deviation, there is no hindrance to the suction detection of the loading lid.

Further, since the suction can be detected by a single switch means regardless of the shape of the loading lid, the structure is simple and there is no need to provide a plurality of detection switches.

Further, since the detection bar is located at the center of the lifting magnet, and the detection bar is guided by the groove, even if the rotation of the magnet alone occurs, the detection bar is not damaged.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view illustrating an embodiment of a lifting magnet storage lid suction detection device according to the present invention.

FIG. 2 is a bottom view of the same device.

FIG. 3 is an enlarged side sectional view of the vicinity of a detection rod of the device.

FIG. 4 is a sectional view taken along line X-X ′ of FIG. 3;

FIG. 5 is a plan view of the vicinity of a limit switch of the lifting magnet.

FIG. 6 is a sectional view taken along line Y-Y ′ of FIG. 2;

FIG. 7 is a side sectional view of a charging lid at a coke oven charging inlet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 Suction surface 13a Outer annular suction surface 13b Central suction surface 17 Coil spring 18 Detection rod 21 Cross-shaped detection bar 21a to 21d Detection bar 23 Limit switch 24 Loading lid

────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Utility Model 52-52748 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C10B 25/24 C10B 41/00

Claims (4)

(57) [Scope of request for utility model registration] 1. A lifting magnet loading lid suction detecting device for magnetically attracting an upper surface of a loading lid of a coke oven by an absorbing surface on a lower surface and detecting the suction of the lid, wherein a central portion of the lifting surface of the lifting magnet is provided. A detection rod slidably in the vertical direction, a plurality of detection bars extending from the lower end of the rod along the suction surface, and the detection rod is urged downward by the urging means together with the detection bar. At the same time, the lower surface of the detection bar is disposed at a position slightly lower than the suction surface as a contact surface to the upper surface of the loading lid, and is further held so as to correspond to a contact pin at the upper end of the detection rod of the lifting magnet. Have been
A lifting magnet is provided, wherein switch means for detecting upward sliding and downward sliding return of the detection rod based on contact between the detection bar and the upper surface of the loading lid is provided. Lid adsorption detector. 2. The lifting lid suction detecting device according to claim 1, wherein the detection bar is a cross-shaped detection bar extending in a radial direction of the suction surface. 3. The lifting magnet according to claim 1, wherein a groove is formed on the suction surface along the detection bar, and an upper half of the detection bar is located in the groove. instrumentation Nyufuta adsorption detector. 4. A lifting magnet according to claim 1, wherein said switch means detects downward sliding of the detection rod accompanying the detachment of the loading lid from the lifting magnet. instrumentation Nyufuta adsorption detector.