JPH09956A - Crusher - Google Patents

Abstract

PURPOSE: To easily and surely perform shim replacement work for the crushed product grading adjustment of a jaw crusher. CONSTITUTION: The control of a moving cylinder 15 and a fixing cylinder 16 in a crushed product grading adjustment mechanism 10 is performed by a solenoid valve and an electric circuit. The operating procedure of both the cylinders 15, 16 is completed by depressing switches arranged in the work order one by one. In this way, maloperation is prevented, and efficient work is enabled.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a technique for adjusting the crushed product particle size of a jaw crusher.

[0002]

The particle size of crushed products in a jaw type crusher is determined by a gap between a swing jaw and its tooth plate, and this gap is changed by changing the thickness of a shim between a toggle block and a wedge block. Adjusted. Therefore, for shim replacement, the toggle block is moved by a hydraulic cylinder (hereinafter referred to as a moving cylinder), and the toggle block is fixed by another hydraulic cylinder (hereinafter referred to as a fixed cylinder). The mechanism is equipped.

When replacing the shim, a clerk operates the two hydraulic cylinders for moving and fixing as follows. First, the fixing cylinder is operated to release the fixation of the toggle block, and the moving cylinder is operated to separate the toggle block from the wedge block. This makes it possible to replace the shim and remove the existing shim and insert another shim. After replacing the shim, operate the moving cylinder to push the toggle block against the wedge block to tighten the shim, and then operate the fixing block to completely fix the toggle block so that it does not move.

[0004]

However, when replacing the shim, it is difficult to operate the two hydraulic cylinders for moving and fixing, and if the wrong operating procedure is performed, the shim will not be completely fixed and the crushing work will be difficult. The toggle block moves inside. That is, if the fixing cylinder is operated before the gap between the toggle block, the shim, and the wedge block is removed by operating the moving cylinder after the shim is replaced, the shim may not be completely fixed, or may occur. Alternatively, the toggle block may be loosened.

An object of the present invention is to provide a crusher capable of easily and surely operating the hydraulic cylinder.

[0006]

Means for Solving the Problems A first method for solving the above problems is described below.
Of the invention, a jaw type crusher has a wedge block as a crushed product particle size adjusting mechanism, a shim, a toggle block for pressing the shim against the wedge block, a moving cylinder for moving the toggle block, and a fixing for fixing the toggle block. A crusher having a working cylinder, comprising: a hydraulic control circuit for controlling the moving cylinder and the fixing cylinder; and an electric control circuit for controlling the hydraulic control circuit.

A second aspect of the present invention is a returning hydraulic cylinder in which the moving cylinder is arranged in a position parallel to the toggle block, and the fixing cylinder is arranged in a position orthogonal to the toggle block. A single-acting hydraulic cylinder, wherein the hydraulic control circuit connects one set of logic valves to the two pressure receiving chambers of the return-acting hydraulic cylinder, and three logic valves that switch the oil passages of the logic valve and the single-acting hydraulic cylinder. A crusher comprising a solenoid valve.

Further, in a third aspect of the present invention, the electric control circuit has a sequence logic circuit in which a plurality of operation switches, a plurality of relays, and a plurality of diodes are combined, and the electric control circuit responds to the operation switches. 3 of the hydraulic control circuit
The crusher is characterized by controlling three solenoid valves.

A fourth invention is a crusher characterized by comprising means for stopping the jaw type crusher when the electric control circuit operates.

[0010]

According to the first aspect of the present invention, when the shim is adjusted, the electric control circuit controls the hydraulic control circuit to control the moving cylinder and the fixing cylinder, so that the operation work of both cylinders becomes simple and reliable.

In the second aspect of the invention, the return hydraulic cylinder applies a force parallel to the moving direction of the toggle block to smoothly move it, and the single-acting hydraulic cylinder moves the toggle block orthogonally to the moving direction. Hold it down smoothly.
Also, both cylinders can be controlled with a simple configuration of one set of logic valve and three solenoid valves.

In the third aspect of the invention, the sequence logic circuit ensures that the moving and fixing cylinders operate in a predetermined procedure according to the operation switch.

In the fourth aspect of the invention, the jaw type crusher is automatically stopped when the electric control circuit is operated, and the shim adjustment work can be safely performed.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of the jaw type crusher of this embodiment. In FIG. 1, a jaw type crusher 1 mainly comprises a flywheel 2 rotated by a drive motor (not shown), a swing jaw 3 having a rotation center eccentric with respect to the center of the flywheel 2, and this swing. The toothed plate 5 is arranged on the opposite side of the jaw 3, and the swing jaw 3 reciprocates in the left-right direction in FIG. 1 according to the rotation of the flywheel 2. The swing jaw 3 is provided with a moving tooth plate 4.

The function of the swing jaw 5 is shown in FIG. As shown in FIGS. 2A and 2B, the crushing target 6 is placed between the swing jaw 3 and the tooth plate 5 from above the crusher. When the swing jaw 3 moves leftward 7 as shown in FIG. 2 (A), the crushing target 6 falls downward, and when the swing jaw 3 moves rightward 8 as shown in FIG. 2 (B), it is crushed. It Then, the crushing target 6 further drops downward, is crushed to a size capable of passing through the crusher outlet 9, and is discharged to the outside of the crusher 1.

Therefore, the size of the product after the crushing process, that is, the particle size of the crushed product is determined by the gap at the crusher outlet 9.

The crusher 1 is equipped with a crushed product particle size adjusting mechanism 10 for adjusting the clearance. As shown in FIGS. 1 and 3, the crushed product particle size adjusting mechanism 10 includes a toggle block 11, a shim 12, a wedge block 13, a toggle plate 14, a moving cylinder 15, and a fixing cylinder 16. There is. Two cylinders 15 and 16 are used as a set (see FIG. 5).

The toggle block 11 is the wedge block 1.
It has a slope 17 corresponding to the slope 3 and is installed so as to be able to approach and separate from the wedge block 13. The toggle block 12 is connected to the swing jaw 3 by a toggle plate 14. The shim 12 is inserted between the slopes of the wedge block 13 and the toggle block 11, and is pressed against the wedge block 13 by the toggle block 11.

A backward hydraulic cylinder is used as the moving cylinder 15, and it is arranged at a position parallel to the moving direction of the toggle block 11, and a link 18 connects them. On the other hand, a single-acting hydraulic cylinder is used as the fixing cylinder 16, and is arranged at a position orthogonal to the moving direction of the toggle block 11.

3 (A) to 3 (C) show the movement of the crushed product particle size adjusting mechanism 10 when the shim is replaced. Prior to shim replacement
In FIG. 3A, the fixing cylinder 16 is operated to pull up the toggle block 11 in the upward direction 19 in the drawing, and at the same time, the moving cylinder is operated to move the toggle block 11 in the left direction 20 in the drawing. As a result, a gap is created between the toggle block 11 and the wedge block 13, and the shim 12 can be replaced. After the shim is replaced, the moving cylinder 15 is operated to move the toggle block 11 in the right direction 21 in the drawing as shown in FIG.
Tighten. After that, as shown in FIG. 3C, the toggle block 11 is moved downward 2 in the drawing by the fixing cylinder 16.
2 and press the shim 12A completely by the wedge action.

FIG. 4 shows the structure of a self-propelled crusher equipped with the above-mentioned jaw crusher 1. In FIG. 4, the self-propelled crusher includes a jaw crusher 1, a power unit 23 that supplies power to each part of the vehicle, a hopper 24 that inputs a crushing target, a frame 25, and a band travel device 26. An operation panel 27 for running and working operations, and a belt conveyor 28 for conveying the products discharged from the crusher 1 to the front of the vehicle body.
And a magnetic separator 29 for removing the reinforcing bars and the like mixed in the product by magnetic force.

Although not shown in FIG. 4 as the power unit 23, an engine, a pump (see reference numeral 30 in FIG. 5), an engine cooling system, a fuel tank, a hydraulic oil tank (see reference numeral 31 in FIG. 5). And so on. The pressure oil sent from the pump is regulated by a pressure control valve (see reference numeral 32 in FIG. 5), and then the crusher 1, the band travel device 26, the belt conveyor 28, the magnetic separator 2
9 is used for driving.

FIG. 5 shows a hydraulic control circuit of the crushed product particle size adjuster. In FIG. 5, this hydraulic control circuit includes a return-moving hydraulic cylinder 15, 15 for moving, a single-acting hydraulic cylinder 16, 16 for fixing, a pump 30, and a hydraulic oil tank 31.
In addition to the pressure control valve 32, a switching valve 33, a logic valve 36, and a fixing solenoid 39.
, A pressure switch 40, an accumulator 41, various oil passages 42 to 48, and the like. Further, the switching valve 33 has a releasing solenoid 34 and a tightening solenoid 35. The logic valve 36 is composed of two pilot type check valves 37 and 38.

The flow of pressure oil in the hydraulic control circuit of FIG.
The connection and operation of each part will be described. The oil sucked up from the hydraulic oil tank 31 by the pump 30 has its hydraulic pressure adjusted by the pressure control valve 32, is supplied to the switching valve 33 via the oil passage 42, and is further supplied to the logic valve 36 by the oil passages 43 and 44. It is supplied to the check valves 37 and 38. The outlet of one check valve 37 of the logic valve 36 is connected to the pressure receiving chamber 15A on the shim tightening side of the return type moving cylinder 15, the fixing solenoid 39, and the pressure switch 40 by the oil passage 45. ing.
The outlet of the other check valve 38 is connected to the shim release side pressure receiving chamber 15B of the moving cylinder 15 by an oil passage 46. The fixing solenoid 39 is connected to the accumulator 41 and the single-acting fixing cylinder 16 by an oil passage 47. Further, the return port of the switching valve 33 is connected to the hydraulic oil tank 31 by the oil passage 48.

Each solenoid 34 of the switching valve 33,
35 is driven by a signal from an electric control circuit (FIG. 6) described later. When the tightening solenoid 35 is driven, the oil passage 43 communicates with the oil passage 42 and a hydraulic pressure is generated in the oil passage 43. The oil passage 44 communicates with the drain oil passage 48 and the hydraulic pressure disappears. When the release solenoid 34 is driven, the oil passage 42 communicates with the oil passage 44 to generate hydraulic pressure in the oil passage 44, and the oil passage 43 communicates with the drain oil passage 48 to lose the hydraulic pressure. At a neutral position where neither solenoid 34, 35 is driven, the oil passage 42 is cut off, and the oil passage 43 and the oil passage 4
No. 4 communicates with the drain oil passage 48, and the hydraulic pressure is lost.

In the logic valve 36, when no oil pressure is generated in the oil passages 43 and 44 on the inlet side of both check valves 37 and 38, the oil passage 43 and the oil passage 45 are shut off, and the oil passage 44 and the oil passage 44 are closed. The road 46 is cut off. And the oil passage 43
If hydraulic pressure is generated in the check valve 38,
The oil passage 44 and the oil passage 46 communicate with each other and communicate with the shim release side pressure receiving chamber 15B of the moving cylinder 15. On the contrary, when the oil pressure is generated in the oil passage 44, another check valve 37 is opened, the oil passage 43 and the oil passage 45 communicate with each other, and the moving cylinder 1
5 communicates with the shim tightening side pressure receiving chamber 15A.

The fixing solenoid 39 connects or disconnects the oil passage 45 and the oil passage 47 according to a signal from an electric control circuit described later. Here, when the solenoid 39 is driven, both the oil passages 45 and 47 are shut off.

FIG. 6 shows an electric control circuit for the hydraulic control circuit described above. In FIG. 6, this electric control circuit 50
Mainly includes eight relays 51 to 58, five diodes 61 to 65, and four operation switches 71 to 74,
It is a sequence logic circuit including a cylinder hydraulic light 80, a shim adjustment switch 90, and wiring circuits 101 to 114.

Of these circuit elements, the relays 51, 5
Reference numerals 4, 55 and 57 are so-called normally-closed type relays, to which a switch circuit is connected when not energized and which switch circuit is cut off when energized. The remaining relays 52, 53, 56 and 58 are so-called normally open type relays, in which the switch circuit is cut off when not energized and the switch circuit is connected when energized.

As shown in FIG. 7, the operation switches 71 to 74 and the cylinder hydraulic light 80 are provided for the shim adjustment control panel 7.
It is mounted on 0. This control panel 70 is near the jaw type crusher 1 for easy operation,
It is arranged at a place different from the operation panel 27 (see FIG. 4). On the right side of the figure of the control panel 80, a switch 71, a switch 73, a switch 74, and a switch 72 are arranged in order from the top so that the operation procedure can be surely performed without making a mistake, and the operation function is provided above each of them. The names "release", "tightening", "fixed", and "end" are displayed. Therefore, hereinafter, the respective switches will be released switches (71), tightening switches (73), fixed switches (74), end switches (7).
2). Each of these switches 71 to 74 is a so-called momentary type switch in which the circuit is connected (on) only while the switch is pressed. A cylinder hydraulic light 80 is also arranged on the upper left of the control panel 80 in the figure in order to indicate that the pressure in the oil passage 45 (see FIG. 5) has exceeded a specified value.

The shim adjusting switch 90 is provided on the operation panel 27 shown in FIG. The reason is for the safety of system adjustment work. A detailed description of the electrical control circuit is given below.

In FIG. 6, when the shim adjusting switch 90 is turned on, for safety, the crusher 1 and the belt conveyor 2
8. For example, a solenoid (not shown) for driving the magnetic separator 29
The power supply circuit 115 to the power supply circuit 115 is turned off and each of these working machines is stopped, and power is supplied from the power supply to the electric control circuit 50, particularly the wiring circuit 101 thereof. If the switch 90 is provided on the operator panel 27, it is convenient in terms of safety and operability.

The electric power supplied to the circuit 101 passes through the cylinder hydraulic light 80 and the circuit 102 and is supplied to the normally open switch portion of the relay 58. This relay 58 is a pressure switch 4
Powered through 0. Therefore, the oil passage 45 of FIG.
When the pressure is higher than the specified value, the cylinder hydraulic light 80 is turned on and the fact is displayed.

The electric power supplied to the circuit 101 is passed through the normally closed switch section of the relay 51 and the circuit 103, and the normally open switch sections of the relays 52 and 53 and the release switch 7 are provided.
1, the end switch 72, and the tightening switch 73.

To release the fixing of the shim 12, the release switch 71 is pushed and turned on. When the release switch 71 is turned on, power is supplied to the circuit 104, which activates the relay 54 to disconnect the circuit 106 and the circuit 107. This power is also transmitted through the diode 61 to the circuit 105.
This electric power actuates the relay 52 and connects the circuit 103 and the circuit 108 by turning on the switch part thereof. This circuit 108 is connected to the circuit 105 through the normally closed switch portion of the relay 57. As a result, a closed circuit is established, and even if the release switch 71 is turned off, power is continuously supplied from the circuit 103 to the circuit 105.

Since the release solenoid 34 of the switching valve 33 shown in FIG. 5 is connected to the circuit 105, the oil passage 42 and the oil passage 44 communicate with each other, and the logic valve 3
Pressure oil is supplied to the shim release side pressure receiving chamber 15B of the moving cylinder 15 through the check valve 38 of No. 6. In this case, since the check valve 37 is opened by the pressure of the oil passage 44 in the logic valve 36, the oil passage 45 becomes the drain oil passage 4
8, the cylinder 16 for fixing and the cylinder 15 for moving
Both the shim tightening side pressure receiving chamber 15A is released. As a result, the toggle block 11 moves to the left in the figure as shown in FIG. 3A, and the shim can be replaced.

When performing the shim fixing work after the shim replacement, first, the tightening switch 73 is pushed to turn it on. When the tightening switch 73 is turned on, electric power is supplied to the circuit 109, and this electric power drives the tightening solenoid 35 of the switching valve 33. Further, the same electric power actuates the relay 57 to cut off between the circuit 105 and the circuit 108 by its switch part, and as a result, the electric power supply to the relay 52 is cut off, so that the circuit 103 and the circuit 108 are also cut off. As a result, these closed circuits are turned off or opened. Therefore, the release solenoid 34 is turned off. Further, electric power is supplied from the circuit 109 to the circuit 110 through the diode 65, and this electric power turns on (drive) the fixing solenoid 39 through the normally closed switch portion of the relay 55 and the circuit 111. At the same time, the electric power of the circuit 110 activates the relay 53 to connect the circuit 103 and the circuit 106 by the switch part thereof, and through the switch part of the relay 54, the circuit 106 and the circuit 1
07 are connected to each other, so that the circuits 103 to 110 are connected.
Is supplied with power.

Therefore, the moving cylinder 15 operates by turning on the shim tightening solenoid 35 only while the tightening switch 73 is being pressed, but even after releasing the tightening switch 73 after pressing the tightening switch 73, that is, turning it on. The fixing solenoid 39 is turned on regardless of whether it is turned on or off.

In this case, when the shim tightening solenoid 35 is turned on, the oil passage 42 and the oil passage 43 are connected to each other and the drain oil passage 48 is connected.
And the oil passage 44 are in communication with each other, pressure oil is applied from the check valve 37 of the logic valve 36 to the shim tightening side pressure receiving chamber 15A of the moving cylinder 15, and conversely, the pressure oil causes a check valve of the logic valve 36. Since the valve 38 is open, the shim releasing pressure receiving chamber 15B communicates with the drain oil passage 48. At this time, the fixing solenoid 39 operates to disconnect the oil passage 45 and the oil passage 47, so that the fixing cylinder 16
The hydraulic pressure remains released, and the moving cylinder 15 moves the toggle block 11 to the right in the drawing as shown in FIG. 3 (B) and tightens the shim 12A.

The shim is tightened by tightening the tightening switch 7
It is performed only while pressing 3, and stops when the switch 73 is released.

When the tightening of the shim 12A is completed, the oil passage 4
Since the hydraulic pressure of 0 goes up, the pressure switch 4 installed there
When 0 detects a hydraulic pressure equal to or higher than a specified value, the cylinder hydraulic light 80 on the control panel 70 is turned on when the switch 40 is turned on, and the operator is informed of the completion of tightening.

After the tightening is completed, the fixed switch 74 is pushed to turn it on. When the fixed switch 74 is turned on,
Electric power is supplied from the circuit 110 to the circuit 112, and this electric power actuates the relay 55 to cut off the electric power supply to the fixing solenoid 39 through the normally closed switch portion. As a result, the fixing solenoid 39 is turned off, and the oil passage 4
7 and the oil passage 45 communicate with each other, the fixing cylinder 16 operates, and the toggle block 11 is pressed downward in the drawing as shown in FIG. 3 (c) to fix the shim 12A.

At the same time, electric power is supplied from the circuit 112 to the circuit 113 through the diode 63, and this electric power actuates the relay 56 to turn on the switch portion of the circuit 1.
10 and the circuit 114 are connected, and these are connected to the circuit 112 via the diode 64. As a result, the relay 56 is held in the ON state of its switch portion, so that the shim fastening solenoid 35 continues to be in the ON state through the diode 62 even if the fixed switch 74 is released.

When the shim fixing work is completed, the cylinder hydraulic light 80 is turned on as in the tightening work to notify the operator of the completion of the work.

After all the work is completed, the end switch 72 is pushed to turn it on. When the end switch 72 is turned on, the relay 51 is activated, the switch 103 is turned off to disconnect the circuit 103 from the circuit 101, and the state before the release switch 71 is pressed is restored. In this manner, the shim adjustment work can be easily performed by simply pressing the switches 71, 73, 74, 72 in order from the top.

The accumulator 41 shown in FIG. 5 is provided for holding the pressure of each cylinder 15, 16 after the adjustment work is completed.

Although the circuit 50 shown in FIG. 6 is used as the electric control circuit for the hydraulic control circuit in the above embodiment, any circuit having the same function may be used, and the circuit is not limited to the circuit 50. is not. For example, as the electric control circuit, a circuit configured by a sequencer, a microcomputer or the like can be used.

[0049]

As described above, according to the invention of claim 1, the electric control circuit controls the hydraulic control circuit to control the moving cylinder and the fixing cylinder during shim adjustment. The operation work of is simple and reliable.

According to the second aspect of the present invention, the return-acting hydraulic cylinder moves the toggle block by applying a force in parallel to the moving direction of the toggle block, and the single-acting hydraulic cylinder moves the toggle block orthogonal to the moving direction of the toggle block. Since it is pressed against, the operation is smooth and reliable. In addition, since one set of logic valve and three solenoid valves control both cylinders,
The hydraulic control circuit can have a simple structure.

According to the third aspect of the present invention, the sequence logic circuit can surely operate the moving and fixing cylinders in a predetermined procedure according to the operation switch.

According to the fourth aspect of the present invention, since the jaw type crusher is automatically stopped when the electric control circuit is activated, the shim adjustment work can be safely performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a jaw type crusher according to an embodiment of the present invention.

FIG. 2 is a view showing a crushing operation of the jaw type crusher of FIG.

FIG. 3 is a diagram showing an operation of a crushed product particle size adjusting mechanism according to an embodiment of the present invention.

FIG. 4 is a view showing an example of the structure of a self-propelled crusher using the jaw crusher of FIG. 1.

FIG. 5 is a diagram showing a hydraulic control circuit according to an embodiment of the present invention.

FIG. 6 is a diagram showing an electric control circuit according to an embodiment of the present invention.

7 is a diagram showing an example of a control panel in which switches and the like in the electric control circuit of FIG. 6 are arranged.

[Explanation of symbols]

 1 jaw type crusher 2 flywheel 3 swing jaw 4 moving tooth plate 5 tooth plate 10 crushed product particle size adjusting mechanism 11 toggle block 12, 12A shim 13 wedge block 14 toggle plate 15 moving cylinder (return type hydraulic cylinder) 15A Shim tightening pressure receiving chamber 15B Shim release pressure receiving chamber 16 Fixing cylinder (single-acting hydraulic cylinder) 23 Power unit 24 Hopper 27 Driving panel 28 Belt conveyor 29 Magnetic separator 30 Pump 31 Hydraulic oil tank 32 Pressure control valve 33 Switching valve 34 Shim tightening solenoid 35 Shim releasing solenoid 36 Logic valve 37,38 Check valve 39 Fixing solenoid 40 Pressure switch 41 Accumulator 42-48 Oil passage 50 Electric control circuit 51-58 Relay 61-65 Diode 70 Control Panel 71 Release Switch 72 End Switch 73 Tightening Switch 74 Fixed Switch 80 Cylinder Hydraulic Light 90 Shim Adjustment Switch 101-115 Wiring Circuit

Claims (4)

[Claims] 1. A jaw block, a shim, a toggle block for pressing the shim against the wedge block, a moving cylinder for moving the toggle block, and a toggle block are fixed to a jaw type crusher. A crusher having a fixing cylinder, comprising a hydraulic control circuit for controlling the moving cylinder and the fixing cylinder, and an electric control circuit for controlling the hydraulic control circuit. 2. A return-acting hydraulic cylinder in which the moving cylinder is arranged in a position parallel to the toggle block, and a single-acting hydraulic cylinder in which the fixing cylinder is arranged in a position orthogonal to the toggle block. The hydraulic control circuit includes a set of logic valves connected to two pressure receiving chambers of a return hydraulic cylinder, and three solenoid valves that switch the oil passages of the logic valve and the single-acting hydraulic cylinder. The crusher according to claim 1, which is characterized in that. 3. The electric control circuit has a sequence logic circuit in which a plurality of operation switches, a plurality of relays, and a plurality of diodes are combined, and in response to the operation switches, the hydraulic control circuit has a sequence logic circuit. The crusher according to claim 2, which controls three solenoid valves. 4. The crusher according to claim 1, further comprising means for stopping the jaw crusher when the electric control circuit operates.