JPS60242135A - Surge adjusting device in conveyor joint section - Google Patents

Abstract

PURPOSE:To adjust surge in the joint section between conveyors, by opening and closing the outlet section of a surge hopper between upstream and downstream conveyors in accordance with the stopping condition of a downstream side conveyor which has been detected. CONSTITUTION:Simultaneously with the operation of a stopping switch for a downstream side conveyor 4, a switch for a motor in an upstream side conveyor 1 is turned off due to the interlock between motors. However, since the time necessary for stopping the upstream side conveyor 1 is longer than that for stopping the downstream side conveyor, materials to be conveyed are pooled in a surge hopper 7. Accordingly, the switch is turned on, simultaneously with the operation of the conveyor stopping switch to extend cylinder mechanism 19, 22 for sliding a vibration feeder 15 set in the lower section of the supper 7 so that a slide gate 16 lowers to block the outlet section 7A of the hopper 7, thereby it is possible to prevent the materials pooled in the hooper from being discharged through the outlet section 7A of the hopper 7.

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention is applicable to earth, sand and concrete used in reclamation work and dam construction in the civil engineering and construction fields, as well as ores and other materials (hereinafter referred to as conveyed materials) used in the steel field, etc. The present invention relates to a surge adjustment device for a conveyor transfer section when conveying materials via a conveyor.

(Prior Art) When transporting objects in the civil engineering/construction field, the steel field, etc., a large number of conveyors are connected and operated via transfer sections.

In such conveyor equipment, when a group of conveyors makes an emergency stop, a nil surge occurs at the receiving end of the transfer section due to the difference in the stop time of each conveyor, making it difficult to restart the conveyors, so the stop time is adjusted. ing.

Conventionally, brake torque has been controlled by installing a mechanical brake, an electric brake, or the like equal to the motor torque as the stop time adjustment means.

(Problems to be Solved by the Invention) According to the conventional example described above, if a braking torque larger than the starting torque is generated to stop the motor in a short period of time, the belt drive device becomes unnecessarily large and expensive. Moreover, the price of the brake becomes very high.

In addition, when the conveyed material is earth and sand from landfill work, etc., if the downstream conveyor is short and the lifting height is large, it will stop in a few seconds.
If the upstream conveyor is long, this will lead to a situation that cannot be solved by the braking mechanism of the upstream conveyor.

In other words, when a large number of conveyors are connected and operated, the conveyor group makes an emergency stop, and a surge occurs in the receiving hopper of the transfer section due to the difference in stopping time of each conveyor.

This amount of surge does not pose much of a problem in the case of a conveyor group with a small transport volume and a short machine length, as the stop time can be adjusted using the brake attached to the electric motor.

However, in the case of large-capacity, long-distance conveyors, in order to adjust the difference in stopping time, it may not be possible to adjust the difference in stopping time using only the standard brake attached to the electric motor. It becomes necessary to add a brake device, and a special operation circuit to control this brake device is also required.

If such an inconvenience occurs, it is natural to review the overall plan and adjust the captain, inclination, and
Although the lift head was reconsidered, there were still cases where a large surge occurred due to adjustment of the stop time.

(Means for Solving the Problems) The present invention has been devised to solve the problems of the conventional example described above, and is capable of transporting materials such as earth, sand, ore, etc., transported by the upstream conveyor. In a conveyor configured to transfer to a downstream conveyor disposed below the conveyor, between the upstream conveyor and the downstream conveyor,
A surge hopper is provided to temporarily store the conveyed material discharged from the upstream conveyor, an opening/closing mechanism is provided at the outlet of the surge hopper to open and close the surge hopper, and a detection means detects a stopped state of the downstream conveyor. provided, furthermore,
The present invention provides a surge adjustment device for a conveyor transfer section, characterized in that an interlocking means for operating the opening/closing mechanism based on a detection signal from the detection means is provided.

(Function) A surge hopper is provided in the middle of the conveyor transfer section, and at the same time as the conveyor stop signal is sent, the vibration feeder or apron feeder as an opening/closing mechanism provided at the hopper exit section is slid horizontally forward, and the conveyance from the hopper exit section is carried out. In addition to preventing objects from flowing out, a slide gate serving as an opening/closing mechanism provided at the hopper outlet is moved vertically downward at the same time as the stop signal is issued to close the hopper outlet.

At startup, when the downstream conveyor reaches a predetermined speed, the vibrating feeder is activated, the material in the surge hopper is discharged to the downstream conveyor, and at the same time as the upstream conveyor is activated, the feeder, that is, the opening/closing mechanism, is retracted to resume normal operation. I will be entering.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings as a conveyor equipment for transporting earth and sand for reclamation work, but the present invention is also applicable to conveyor equipment for transporting concrete for dam construction, steel stone, etc. Needless to say, it can also be used in conveyor equipment for conveying raw materials for steel manufacturing.

In FIGS. 1 and 2, 1 is wound around dovetails, rolls 2, tension rolls 3, etc. on an upstream conveyor, and can be freely rotated and stopped in the direction of arrow A via a drive motor (not shown), etc. .

4 is a downstream conveyor, which is wound around a roll 5;
It can freely circulate in the direction of arrow B via a drive motor (not shown), and has cargo receiving skirts 6 on both sides (see FIG. 3).

The conveyed material represented by the earth and sand transferred by the upstream conveyor 1 is transferred to the downstream conveyor 4 disposed below the conveyor 1.
The waste is transferred to the downstream conveyor 4 and transported to the desired landfill site or the like.

Reference numeral 7 denotes a surge hopper, which is provided between the upstream conveyor 1 and the downstream conveyor 4, and in this embodiment, a surge hopper is installed at the lower stage of the discharge hopper 8 via a discharge hopper 8 that guides conveyed objects in a vertical direction. 7 is attached to a pair of left and right support frames 9.

A buffer plate 0 is inserted into the discharge hopper 8, and the upper part of the buffer plate 10 is rotatably supported via a horizontal horizontal shaft 108. A pair of left and right telescopic cylinders 1 provided on the side
1, the buffer plate 10 is rotated around the horizontal axis 11 as a fulcrum.
is swingable, and the discharge (dropping) position of the transported object relative to the surge hopper 7 can be adjusted here.

The surge hopper 7 temporarily stores the conveyed material discharged from the upstream conveyor 1, and in this embodiment, the front and rear walls are tapered to 100,000 degrees, and the left and right walls are vertically parallel. At the lower end of the rear wall, there is provided a forward inclined chute 12, and on the upper surface of the chute 12 there is provided a plate-like body 13 arranged in a lattice pattern, where the chute 12 is a dead chute, It is designed to absorb the impact of a falling object, and also to protect the belt by causing the object to fall in the belt traveling direction of the downstream conveyor 4.

An opening/closing mechanism 14 is provided at the outlet section 7^ of the surge hopper 7, and the outlet section 78 is opened and closed.

The opening/closing mechanism 14 of this embodiment includes a vibrating feeder 15 that is movable in the horizontal direction and a slide gate 1 that is movable in the vertical direction.
It consists of 6.

The vibration feeder 15 is located below the shoe eye 2, is supported by front and rear elastic damper bodies 17 on each of the support frames 9, and is equipped with a vibration motor 18 and a sliding cylinder mechanism 19. Guide body 20 attached to the piston rod of the cylinder mechanism 19
can be freely moved back and forth by the stroke indicated by the reference numeral in FIG.

That is, during normal operation, it is positioned at the chain line C in Figure 1, and when a large amount of cargo is spilled from both sides of the downstream conveyor 4, it is moved to the solid line position in Figure 1 to prevent this. It is made to do.

The slide gate 16 has a pair of left and right guide bodies 2I attached to the front wall of the surge hopper 7 as shown in FIG.
One end of the telescopic cylinder mechanism 22 is attached to the surge hopper 7, and the other end of the telescopic cylinder mechanism 22 is attached to the slide gate 16. The outlet portion 7A is lowered by a stroke indicated by reference numeral H in FIG.

Next, with reference to FIG. 4, the overall operation procedure, that is, the time of starting and the time of stopping will be explained.

In addition, in Fig. 4, the symbol h1 is the upstream conveyor motor, M2 is the downstream conveyor motor, the former is the vibration feeder,
M4 is a pump motor, P is a pump, A is an accumulator, vl is a switching solenoid valve for pump P, v2 is a switching solenoid valve for the vibration feeder cylinder mechanism 19, v3 is a switching solenoid valve for the slide gate cylinder mechanism 22, S
l is the switch for the upstream conveyor motor elbow, S2 is the switch for downstream conveyor motor 2, B3 is the switch for vibration feeder M3, B4 is the switch for the old pump motor, S5 and S5' are the switching solenoid valves S6 and S6' are switches for the switching electromagnetic valve v3, B is a power source, B1 is an emergency power source (battery), and S7 is an emergency changeover switch.

[About startup]

(1) Starting the pump motor In order to accumulate the pressure oil for operating each cylinder in the accumulator A, first turn on the switch S4 to start the pump P.

(2) Downstream conveyor, vibration feeder start switch S2
The switch S3 is turned on to start the motor M2 of the downstream conveyor and the vibration feeder 1113 at the same time to supply the buried material in the surge hopper to the downstream conveyor.

Usually, the conveying capacity of the downstream conveyor is greater than the supply capacity of the vibratory feeder.

Therefore, switch S2 uses a timer and switch S4
Adjust the time until switch S2 is activated after activation.

At the same time as the vibration feeder is activated, switch S6 of the switching solenoid valve v3 of the hydraulic cylinder mechanism for gate slide is turned on, the slide cage is pulled up, and the outlet of the surge hopper is opened.

(3) Operation of the cylinder mechanism for moving the vibration feeder When the soil in the surge hopper is empty, turn off switch S3 to stop the vibration feeder, and switch S of the switching solenoid valve v2.
5 to operate the valve v2 that operates the cylinder mechanism 19 to move the vibration feeder to the rear of the surge hopper.

(4) At the same time as the upstream conveyor activation vibration feeder retreats to the specified position, switch S
1, the old motor is started, the upstream conveyor is started, and the conveyed material (earth and sand) is dropped into the surge hopper via the discharge hopper, and is caused to flow down the belt traveling method of the downstream conveyor.

[About stopping]

In the case of an emergency stop, the main power source B is alive, but in the case of a power outage stop, the changeover switch S7 is activated at the same time as the main power source B is turned off, allowing operation power to be obtained from the emergency power source.

(1) Emergency stop At the same time as the stop switch of the downstream conveyor is activated, the ink lock between the motors turns off the switch S1 of the old upstream conveyor motor.

However, since the time required for the upstream conveyor to stop is longer than that of the downstream conveyor, the conveyed material (earth and sand) carried from the upstream conveyor is not allowed to flow down to the downstream conveyor.
It is necessary to store it in a surge hopper.

Therefore, at the same time as the conveyor stop switch S1 is actuated, switches S5'' and S6' are turned on to extend each cylinder mechanism 19.22 to block the outlet of the surge hopper, and the conveyed material (earth and sand) stored in the surge hopper is transferred to the surge hopper. Prevents leakage from the outlet onto the downstream conveyor.

(2) Power outage stop operation The other operations are the same as described above except that the power source is obtained from the emergency power source B1.

[About the pump]

Since the hydraulic pump P always stores pressure oil in the accumulator, it automatically starts and stops repeatedly by operating the solenoid valve v1 at a constant pressure, and when the conveyor stops, the pressure oil necessary for operating each cylinder is stored in the accumulator. Accumulate pressure.

During a long-term power outage, the pressure oil in the accumulator leaks, and we are concerned about securing enough pressure oil for each cylinder to operate, so we start the cylinders first.

Here, as is clear, a detection means for detecting the stopped state of the downstream conveyor 4 is provided, and based on the detection signal of this detection means, each of the switches described above, that is, shown in FIG. etc. constitute the interlocking means.

If time adjustment is not possible and the stop time of the upstream conveyor 1 is extended, it is necessary to secure a storage amount corresponding to the difference in stop time. An example of determining the capacity of the surge hopper 7 based on this is shown below.

Transport amount of downhill conveyor -4650Or+(/h=
4.58rr? /see Upstream conveyor stop time and conveyance amount 30 seconds 4.58rr! /5ecX30sec
-=68.7rr+downstream conveyor stop time and conveyance amount 10sec 4.58n? /5ecX10sec
-=22.9n (According to the above estimate, the amount stored in the surge hopper 7 is 68.7-22.9 = 45.8 rrr,
In this state, a considerable amount of debris protrudes from the outlet and is buried in the receiving skirt 6 of the downstream conveyor 4.

Furthermore, upon restart, the increase in the amount of cut out from the surge hopper 7 causes the earth and sand from the downstream conveyor 4 to overflow, causing a large amount of cargo to spill from both sides.

In order to prevent such a situation, as shown in Figure 4, when the conveyor stop switch is turned on, the vibration feeder installed at the bottom of the surge bar 7 is slid and moved from the broken line position in Figure 1 to the solid line position, and the slide gate is closed. It is lowered to close the flange exit portion 7A.

(Effects of the Invention) According to the present invention, the brake capacity for reducing stopping time;
It is possible to reduce the number of brakes and reduce costs.

Furthermore, the conveyor frame and belt drive device can be planned within the starting torque, making it economical.

This can be easily done even if the brake cannot be adjusted due to the conveyor layout.

Eliminates overflow from the downstream conveyor at startup,
This enables smooth operation.

When the hopper is stopped, the hopper damper is switched to release the earth and sand (!II conveyance)
This eliminates the hassle of discharging waste to the outside of the hopper and transporting it by dump again.

With respect to the conveyor layout plan, the surge hopper can be made smaller, so flexibility is improved by only having to deal with the hopper capacity.

Therefore, the present invention is very useful as a conveyor transfer section surge adjustment device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall side view;
FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is an explanatory diagram of the control circuit. 1-upstream conveyor, 4-downstream conveyor, 7-surge hopper, 7A-exit section, 14-opening/closing mechanism, 15-vibration feeder, 16-slide gate. Patent applicant Kobe Steel, Ltd.

Claims (1)

[Scope of Claims] (1) A conveyor configured to transfer objects such as earth and sand, ore, etc., transferred by an upstream conveyor to a downstream conveyor disposed below the conveyor, comprising: the upstream conveyor; A surge hopper is provided between the downstream conveyor and the material discharged from the upstream conveyor, and an opening/closing mechanism is provided at the outlet of the surge hopper to open and close the surge hopper. A surge adjustment device for a conveyor transfer section, characterized in that a detection means for detecting a stopped state is provided, and an interlocking means for operating the opening/closing mechanism based on a detection signal from the detection means. 2. A vibrating feeder with a horizontally movable opening/closing mechanism;
2. The conveyor transfer section surge adjustment device according to claim 1, comprising: a vertically movable slide gate;