JPH0376249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control device for a powder discharge device in a powder transport vehicle.

Powder transport vehicles that transport powder and granular materials such as feed are generally equipped with a powder storage tank on the vehicle frame. A screw conveyor is provided at the bottom in the longitudinal direction to form an in-tank conveyance section in the tank, and a conveyance cylinder having the screw conveyor inside the cylinder is erected by communicating with the rear end of the in-tank conveyance section. A discharge tube having a screw conveyor installed inside the cylinder is provided in communication with the upper end of the conveyance tube so that it can freely rise and fall, and the powder and granules in the storage tank are transferred to the discharge tube by rotating each screw conveyor. A device is in practical use that discharges waste into a silo or the like from the tip.

To control the powder discharge device in this type of powder transport vehicle, all screw conveyors are normally activated and stopped by a control lever installed at the rear of the tank. , When a worker climbs onto the silo to monitor the feed (powder and granules) being filled into the silo, such as when one worker puts feed into the silo, the rotation of the screw conveyor In order to stop the tank, the worker had to get off the silo and operate the control lever at the rear of the tank, which was extremely troublesome for the worker.

The present invention has been made in consideration of the above points, and includes the rear position of the powder storage tank and the position of the tip of the discharge pipe outside the tank that transports and discharges the powder and granule from the inside of the storage tank to the outside. The purpose of the present invention is to provide an operating means that can control all of the powder and granular material conveyance equipment, and to make it possible to rotate and stop all the screw conveyors by means of the operating means, thereby reducing the labor of the operator. The present invention aims to provide a remote control device for a powder transport vehicle.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, reference numeral 1 denotes a granular material transport vehicle for transporting various kinds of feed, etc., and a granular material storage tank 3 is mounted on a vehicle frame 2.

The lower part of the powder storage tank 3 has an inverted triangular cross section with both side surfaces slanting inward, and a screw conveyor 4 connected to a hydraulic motor 5 is installed at the bottom of the tank 3.
are provided in the longitudinal direction to form an in-tank transport section 6.

Reference numeral 7 denotes a conveying cylinder erected at the rear of the powder storage tank 3, the lower end of which communicates with the in-tank conveying section 6, and a screw conveyor 8 connected to a hydraulic motor 9 installed therein.

10 is a discharge tube connected to the upper part of the conveyor tube 7, and a screw conveyor 11 connected to a hydraulic motor 12.
is installed internally, and an undulating cylinder 13 is disposed between it and the conveying cylinder 7.

Reference numeral 14 denotes a bellows-shaped outlet tube that is configured to be foldable at the tip of the discharge tube 10, 15 an operation box provided at the rear of the powder storage tank 3, and 16 an operation box provided near the tip of the discharge tube 10. box, 17
is an operation box provided at the tip of the discharge tube 10.

In addition, in the figure, 18 is a silo into which feed is input.

FIG. 2 shows a hydraulic circuit for operating the hydraulic motor and the luffing cylinder.

In the figure, 19 indicates each of the hydraulic motors 5, 9,
The first directional control valve controls the rotation of the coil
It has SOL-A1 and SOL-B1.

20 is a second directional control valve that controls the extension of the above-mentioned undulating cylinder 13 and stops only the hydraulic motor 5 of the tank transport section 6;
- has B2.

These first and second directional control valves 19 and 20 are four-way three-position switching valves that allow the supplied hydraulic pressure to pass through in their neutral positions, and are manually operated by operating levers 21 and 22, respectively. Also possible.

Reference numeral 23 designates a third directional control valve for controlling the contraction of the above-mentioned undulation cylinder 13, which includes an electromagnetic control valve 23a having a coil SOL, a switching cock 32 and a check valve 23b, which will be described later, connected in parallel with the control valve 23a.
It is composed of.

24 is a hydraulic pump, and 25 is an oil tank.

The hydraulic pump 24 is connected to the first,
The second solenoid valves 19 and 20 are connected, and the pressure oil generated by the oil pump 24 is controlled to a specified pressure value through a control valve 27 provided in the middle of the piping.

One coil SOL of the first directional control valve 19
- When A1 is energized and energized, the valve spool on this side is switched, and the piping 26 and the secondary piping 28 are connected to the hydraulic motors 12, 9, and 5 connected in series.
Pressure oil flows sequentially to each screw conveyor 1.
Rotate 1, 8, 4.

Furthermore, when the excitation of coil SOL-A1 is released,
The valve spool moves to the neutral position due to the elasticity of the spring.

In the figure, reference numeral 29 denotes a control valve connected between hydraulic motors 9 and 5, which is pilot operated by the oil pressure between hydraulic motors 12 and 5. 30 is a return oil pipe line.

One coil SLO of the second directional control valve 20
- When A2 is energized and energized, the valve spool on this side is switched, the piping 26 and the piping 31 on the secondary side communicate with each other, pressure oil flows into the piston back chamber of the undulation cylinder 13 and expands, and the discharge pipe 10 The undulating cylinder 13 is erected from its storage position to its use position, and when the undulating cylinder 13 is contracted, the solenoid valve 23a provided in the middle of the piping 31 is switched by energizing the coil SOL of the solenoid valve 23a to drain the pressure oil. The solenoid valve 23a
It is also possible to release the pressure oil by manually operating the switching cock 32 connected in parallel to the valve.

Next, the coil SOL-A1 of the first directional control valve 19
When the directional control valve 19 is switched by energizing and the hydraulic motors 12, 9, and 5 are rotating, when the other coil SLO-B2 of the second directional control valve 20 is energized and energized, The valve spool on this side is switched, and a pipe 33 and a return oil pipe line 3 branch from the pipe connecting the hydraulic motors 9 and 5.
0 is communicated, no pressure oil flows to the hydraulic motor 5, and only the screw conveyor 4 stops rotating.

Note that 34 is a throttle disposed downstream of the third directional control valve 23 and in a bypass circuit 31' branched from the piping 31;
is in the neutral position and the first directional control valve 19 is switching to one side, high pressure oil leaks through the spool of the second directional control valve 20 and reaches the pipe 31, causing the undulation cylinder 13 to extend. to prevent

FIG. 3 shows an electrical circuit diagram for controlling the hydraulic circuit.

In the figure, SW1 is the power switch, SW2,
SW3 is two emergency stop switches connected in series, followed by the following circuits.

(1) It has two conveyor stop switches SW4 and SW5 consisting of a changeover switch, and by switching either one of the switches, the second
energize the coil SOL-B2 of the directional control valve 20,
In this de-energized state, circuit A energizes relay R3.

(2) Circuit B that energizes the coil SOL-A1 of the first directional control valve 19 via the normally open relay contact r2.

3 Two conveyor rotation switches SW6, SW7
, and when one of the switches is operated, three normally closed conveyor stop switches SW8 and SW9 connected in series are
Circuit C energizes three relays R1, R2, and R4.

In addition, relay contact r1 of relay R1 is a switch.
Configures a holding circuit for SW6 and SW7.

(4) Normally open relay contact r3 of the above relay R3,
Connect the normally closed relay contact r4 of relay R4 in series, and then connect the two discharge stack upright switches.
A circuit D having SW10SW11 and energizing the coil SOL-A2 of the second directional control valve 20 when any one of the switches is operated.

(5) Two ejector stack lowering switches SW12 and SW are branched from the connection point between relay contact r4 of circuit D and ejector stack upright switches SW10 and SW11.
13, and energizes the coil SOL of the third directional control valve 23 when either one of the switches is operated.

In the figure, PL1 is a pilot lamp that lights up when the power switch SW1 is closed, and PL2 is a pilot lamp that lights up while the coil SOL-B2 of the second directional control valve 20 is energized.

However, the operation box 15 provided at the rear of the powder storage tank 3 is equipped with the above-mentioned power switch SW.
1. Emergency stop switch SW2, conveyor stop switch SW5, conveyor rotation switch SW7, conveyor stop switch SW9, discharge tube upright switch
SW11, and a discharge tube tilting switch SW13 are provided, and the operation box 17 at the tip of the discharge tube includes the above-mentioned conveyor stop switch SW4, conveyor rotation switch SW6, conveyor stop switch SW8,
A discharge tube raising switch SW10 and a discharge tube lowering switch SW12 are provided, and the above-mentioned emergency stop switch SW3 is provided in the operation box 16 near the tip of the discharge tube.

Further, operating levers 21 and 22 for manually operating the first and second directional control valves 19 and 20 and an operating valve 32 for reducing the size of the undulating cylinder 13 are both disposed near the operating box 15.

Next, the operation of the above device will be explained.

Before starting work, the contacts of each switch and each relay are at the positions shown in FIG.

Now, when filling the silo 18 with the feed (powder) in the powder storage tank 3, the operator must press the operation box 1 on the ground or after climbing into the silo 18.
5, 17 discharge pipe upright switch SW10, Sw1
When either one of 1 is operated, the coil of circuit D
Current flows through SOL-A2 through relay contacts r3 and r4, switching the second directional control valve 20 to the left position. As a result, pressure oil is supplied to the undulation cylinder 13, and as the undulation cylinder 13 expands, the discharge pipe 1
0 stands up from the traveling storage position.

At the same time, the discharge tubes 7 and 10 are rotated by the rotating device, and the discharge tube 1 is placed inside the silo 18.
Let 4 hang down.

Next, when either conveyor rotation switch SW6 or SW7 is operated, relay R2 of circuit C is activated.
By energizing, the relay contact r2 of the circuit B is closed, and the coil SOL-A1 is energized to switch the first directional control valve 19. As a result, the pressure oil sequentially flows to the hydraulic motors 12, 9, 5, rotates each screw conveyor 11, 8, 4, and fills the silo 18 with the feed in the powder storage tank 3.

In addition, while filling the feed into the silo 18,
Usually, an operator climbs on top of the silo 18 and monitors the filling of feed into the silo 18.

Next, when the silo 18 is full, operating either conveyor stop switch SW8 or SW9 will cut off the current to relay R2 of circuit C, open relay contact r2 of circuit B, and coil the coil.
Cut off the power to SOL-A1 and turn off the first directional valve 19.
returns to the neutral position under the bias of the spring. At this point, the supply of pressure oil to the hydraulic motors 12, 9, 5 is cut off, and the rotation of all screw conveyors 11, 8, 4 is stopped.

Note that the first and second directional valve control valves 19, 20
Of course, the switching operation can also be performed manually by operating the operating levers 21 and 22 at the operating box 15.

If an emergency situation occurs in which the work must be stopped immediately while the worker is climbing the silo 18 and filling the silo 18 with feed as described above, the worker must press the control box 16. When the emergency stop switch SW3 is operated, the current flowing through all circuits is cut off and all operations are stopped.

When this emergency situation occurs, all operations can be stopped either on the ground or by operating the emergency stop switch SW2 of the operation box 15.

In addition, the feed from the powder storage tank 3 is transferred to the silo 1.
8 and when the silo 18 is almost full, operating either conveyor stop switch SW4 or SW5 will turn off the coil SOL- of circuit A.
B2 is energized to switch the second directional control valve 20.
As a result, after the pressure oil leaves the hydraulic motor 9, it flows to the return pipe 30 via the solenoid valve 20, and does not flow to the hydraulic motor 5, causing only the rotation of the screw conveyor 4 in the tank transport section 6. stops. Therefore, the feed remaining in the transport cylinders 7 and 10 is supplied to the silo 18.

At this time, the power to the relay R3 is cut off, the relay contact r3 is opened, and the circuits D and E are opened, so that the discharge tube 10 cannot be inadvertently raised or lowered.

As mentioned above, this invention is mounted on the vehicle frame,
In addition, when feeding, for example, feed into a silo by the conveyance means at a rear position of a powder storage tank having a conveyance means and at a tip position of the conveyance means, an operator can not only be on the ground but also climb into the silo. From stopping all operations in the event of an emergency even if the screw conveyor remains closed, to intermittent work by controlling the rotation of some screw conveyors during work, to uniformly controlling all screw conveyor start and stop operations. Because it can be done by one person, it has the excellent effect of improving labor efficiency.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of a powder transport vehicle in a state where powder and granular materials are being put into a silo, Fig. 2 is a hydraulic circuit diagram, and Fig. 3 is an electric circuit diagram. It is a circuit diagram. 1... Powder transport vehicle, 2... Car frame, 3... Powder storage tank, 4, 8, 11... Screw conveyor, 5, 9, 12... Hydraulic motor, 6... Transport in tank Part, 7... Conveyance tube, 10... Discharge tube, 1
3... Lifting cylinder, 14... Derivation cylinder, 15, 1
6, 17...Operation box, 18...Silo, 1
9...First direction control valve, 20...Second direction control valve, 21, 22...Operation lever, 23...Third direction control valve, 24...Hydraulic pump, 25...Oil tank, 26, 28 , 31, 33... Piping, 27, 2
9...Control valve, 30...Return oil pipe line, 32...Operation valve, 34...Bypass circuit.

Claims (1)

[Scope of Claims] 1. A powder storage tank mounted on a vehicle frame, a first conveyance means disposed at the bottom of the storage tank, and a second conveyance means communicated with the first conveyance means, a third conveyance means that is communicated with the second conveyance means and is movable up and down by an undulation cylinder; a plurality of hydraulic motors that drive these conveyance means; a first directional control valve that controls rotation of these hydraulic motors; A powder transport vehicle comprising: a second directional control valve that controls extension of the undulating cylinder and stops only the hydraulic motor of the first conveyance means; and a third directional control valve that controls contraction of the undulating cylinder. An operation section for each of the directional control valves is disposed at the tip of the third conveyance means, and the operation section includes a first switch that rotates all the hydraulic motors, and only the hydraulic motors linked to the first conveyance means. At least a second switch for stopping the rotation of the hydraulic motor, a third switch for extending the undulation cylinder, a fourth switch for contracting the undulation cylinder, and a fifth switch for stopping the rotation of the full hydraulic motor are provided. Remote control device for powder transport vehicles. 2. A patent claim characterized in that the first and second directional control valves are constituted by electromagnetic control valves that can be manually controlled, and the manual operation part thereof is disposed at the rear of the powder storage tank. A remote control device for a powder transport vehicle according to item 1. 3. The third directional control valve comprises a switching socket, an electromagnetic control valve connected in parallel to the switching socket, and a check valve that only allows pressure oil to flow to the undulation cylinder. A remote control device for a powder transport vehicle according to item 1. 4. The method according to claim 3, characterized in that a bypass circuit to an oil tank is branched downstream of the check valve constituting the third directional control valve, and a throttle is provided in the bypass circuit. Remote control device for powder transport vehicles.