JPH0738160U - Charging vehicle charging hole cleaning device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is directed to a rotary scraper 4 for cleaning a kiln mouth lid sheet surface 13 in a coal charging vehicle cleaning hole cleaning device for a coke oven.
Is to contact the seat surface 13 without impact so as not to damage or damage the seat surface 13 of the castable furnace frame. [Structure] An elevating frame 3 is provided on a machine frame 2 of a coal charging car 1, a rotary scraper 4 for cleaning a loading inlet lid sheet surface is provided at a lower end portion of the elevating frame 3, and an elevating cylinder 5 of the elevating frame 3 is provided.
The reverse pressure hydraulic circuit 8 of the cylinder 5 which is switched by the switching valve 7 is formed in the hydraulic circuit 6 and the pressure adjusting valve 9 is provided in the reverse pressure hydraulic circuit 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleaning device for a charging inlet lid sheet surface in a charging hole cleaning device provided in a coal car of a coke oven.

[0002]

[Prior art]

 A charging hole cleaning device is known in which a rotary scraper for cleaning the surface of a charging port lid is provided at the lower end of an elevating frame provided with a centering device on the machine frame of a coal charging vehicle (Japanese Patent Laid-Open No. 5-39487). However, the above-mentioned cleaning device is equipped with a screw cutter for cleaning the inside of the kiln and has a large self-weight, and an excessive impact force acts on the seat surface due to the speed at which it comes into contact with the seat surface. There was a problem of damaging the frame. In particular, there is a problem that the furnace frame made of castable refractory material, which has been adopted in recent years, and the surface of the castable sheet are likely to suffer a cracked furnace frame accident (Japanese Patent Laid-Open No. 49-125402).

[0003]

[Problems to be solved by the device]

 In this plan, a rotating scraper for cleaning a heavy inlet lid sheet surface in a charging hole cleaning device for a coal-charging vehicle is safely and safely contacted with the castable kiln mouth lid sheet surface of the castable furnace frame without impact, and the castable furnace as well as the sheet surface. The purpose is to prevent breakage or damage of the frame.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is to equip a machine frame of a coal charging vehicle with an elevating frame, and at the lower end of the elevating frame an oscillating scraper for cleaning the inlet cover sheet surface. A reverse pressure hydraulic circuit of the cylinder that is switched by a switching valve is formed in the hydraulic circuit of No. 3, and a charging vehicle cleaning hole cleaning device is provided in which a pressure adjusting valve is provided in the reverse pressure hydraulic circuit.

[0005]

[Action]

 In this plan, the lifting cylinder is operated to lower the lifting frame, and before the rotary cover scraper for cleaning the inlet port seat surface comes into contact with the seat surface, the switching valve is switched at a predetermined position immediately above the seat surface to switch the reverse pressure hydraulic pressure. By operating the circuit, it is possible to suppress the self-weight acceleration of the lifting frame and other devices provided with the scraper and the acceleration on the hydraulic circuit side, so that the scraper is loosely contacted with the seat surface.

[0006]

【Example】

 An upright guide guide 11 which can be slid forward, backward, leftward and rightward is vertically provided on a machine frame 2 of a coke oven coal car 1 through an air bearing 10, and an elevating frame 3 is supported along the guide 11, and an elevating frame 3 The lower part of the outside and the guide 11 are connected by the lifting cylinder 5, and the hydraulic circuit 6 can be operated to move the lifting frame 3 up and down, and the rotation for cleaning the entrance cover sheet surface provided at the lower end of the lifting frame 3 The scraper 4 is brought into contact with the seat surface 13 of the lower loading port 12.

In that state, the seat surface 13 and the scraper 4 are generally eccentric. However, by rotating the scraper 4 in the horizontal direction to bring the scraper 4 into contact with the seat surface 13, the air bearing 10 acts. The guide guide 11 slides in the horizontal direction, and the center line of the scraper 4 is aligned with the center line of the seat surface 13.

When the scraper 4 descends to a predetermined position just above the seat surface 13 when the elevating frame 3 descends, the limit switch (or remote control device) operates to operate the electromagnetic switching valve 7 to operate the reverse pressure hydraulic circuit 8 Is opened, a reverse pressure is applied to the lifting cylinder 5.

For example, in the case of a screw cutter weight of 2100 kg and an elevating cylinder of 100 mm, the weight of the screw cutter 14 for cleaning the inside of the kiln provided on the elevating frame 3 and the descending load W d of the descending oil pressure are 3927 kg, and the reducing load Wu due to the reverse pressure is Since it is 3130 kg, the reaction force R received by the seat surface 13 in the back pressure state is R = Wd−Wu = 797 kg.

That is, the reaction force of 3927 kg when there is no back pressure is reduced to the reaction force of 797 kg by the back pressure. This back pressure is arbitrarily adjusted by the pressure adjusting valve 7. This adjustment is adjusted according to the cleaning effect and the strength of the castable sheet surface or the steel sheet surface 13 due to the irregular refractory, but the cleaning load is set lower than the strength load of the sheet surface 13.

Reference numeral 15 in the figure denotes a center restoration female conical surface of the upright guide 11, 16 is a male conical surface, 17 is a rotation gear of the scraper 4, 18 is a hydraulic motor for driving the gear, and 19 is the screw. A support frame of the cutter 14, 20 is a small cylinder for raising and lowering the support frame 19, and 21 is a lid removing device.

[0012]

[Effect of device]

 Since the present plan is configured as described above, in a coal-charging vehicle charging hole cleaning device, the rotary scraper for cleaning the charging lid cover surface can be safely used without impact on the kiln opening cover sheet surface of the castable furnace frame by the irregular refractory. It is possible to bring them into contact with each other, and it is possible to prevent the sheet surface and the furnace frame from being broken or damaged.

[Brief description of drawings]

FIG. 1 is a diagram showing a hydraulic circuit and a back pressure circuit of a coal charging vehicle charging hole cleaning device of the present invention.

FIG. 2 is a front view of the cleaning device.

FIG. 3 is a side view of FIG. 2 viewed from the left side.

[Explanation of symbols]

 1 Charging car 2 Machine frame 3 Lifting frame 4 Loading inlet cover Rotating scraper for cleaning seat surface 5 Lifting cylinder 6 Hydraulic circuit 7 Switching valve 8 Reverse pressure hydraulic circuit 9 Pressure adjusting valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tetsuo Yamane Inventor, Kashima Steel Works, Sumitomo Metal Industries, Ltd.

Claims (1)

[Scope of utility model registration request] 1. An elevating frame is provided on a machine frame of a coal charging vehicle, a rotary scraper for cleaning a loading inlet seat surface is provided at a lower end of the elevating frame, and a hydraulic circuit of an elevating cylinder of the elevating frame is switched. A coal-charging vehicle charging hole cleaning device which forms a reverse pressure hydraulic circuit of the cylinder which is switched by a valve, and a pressure adjusting valve is provided in the reverse pressure hydraulic circuit.