JP2870736B2 - Crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a set adjusting device for adjusting a minimum gap of a crushing portion of a crusher for producing coarse aggregate and fine aggregate used for concrete and asphalt mixture, and a liner use status display device. The crusher provided.

[0002]

2. Description of the Related Art Conventionally, a mantle mounted so as to cover a pine cone-shaped head that moves up and down while rotating eccentrically about a vertical axis, and the inside of a bowl stationaryly disposed around the mantle. In a crusher of the type in which the raw material is crushed with a bowl liner, such as a cone crusher or a gyra disc, the minimum gap formed between the mantle and the bowl liner is called a set or set value, and this set value is adjusted. It controlled the crusher product size. In order to adjust the set value, as shown in FIG. 1, the adjustment ring 22 placed on the main frame 2 is kept stationary, and the bowl 20 screwed with the adjustment ring 22 is enlarged. In order to reduce the set value, it was necessary to rotate counterclockwise in order to reduce the set value. For this purpose, since the total weight of the bowl 20 and the bowl liner 21 is large, wires are respectively hooked on hooks provided at four circumferential positions of the adjustment cap 40 previously attached to the upper end of the bowl by using a lifting means such as a crane, and gravity. To the free state,
The wire is directly wound on the above-mentioned hook without being lifted or wound around the outer periphery of the adjustment cap 40 for several turns by pushing three hands, and the other end of the wire is shovel loader, hoisting machine. ,
They used trucks and other pulling devices and pulleys to rotate horizontally, but all these operations were complicated and forced to suspend operation for a long time.

[0003]

In the device of the present invention, instead of such complicated and time-consuming work, the set value can be changed easily and automatically and easily by remote control during driving. In addition, the usage of the liner during operation can be constantly monitored.

[0004]

In order to solve the above-mentioned problems, a crusher set adjusting device according to the present invention comprises a main frame, an adjustment mounted on the main frame and having an inner peripheral surface threaded therein. A ring, a bowl threaded on the outer peripheral surface and capable of moving up and down by being screwed to the adjustment ring; and a main shaft disposed at the center bottom of the main frame and vertically or substantially vertically supported via a boss. And a crusher having an eccentric fitted to the main shaft via a bearing and eccentrically rotated with respect to a vertical axis, a head fitted and rotated to the eccentric via a bearing, and eccentric rotation driving means. A plurality of circumferentially equidistantly spaced sides of an adjustment cap having a cylindrical surface disposed at the upper end of the bowl or the bowl. And a ratchet mechanism which is rotatable about a vertical axis, abuts on the drive bar via a spring force, and suppresses rotation of the bowl, and the ratchet is moved as the piston rod advances. A pair of hydraulic cylinders that release the lock of the mechanism and rotate the bowl clockwise or counterclockwise by pressing the side surface of the drive bar are rotatable about the vertical axis outside the bowl or the adjustment cap. , A proximity switch is fixedly provided facing at least one of the drive bars, and a hydraulic unit for driving the pair of hydraulic cylinders is provided, and an operation command is transmitted to the hydraulic unit. Equipped with a programmable operation display and a control panel for storing the sequencer controller, and at the same time as the actual operation from the start of use of the liner , Wear amount, the wear rate, the remaining allowable wear amount, and to display a like operation indicator liner replacement predicted remaining time to the control panel.

[0005]

According to the crusher set adjusting device of the present invention, it is determined whether the rotation direction is clockwise or counterclockwise depending on whether the set value (minimum gap) is reduced or increased with respect to the current state. The rotation direction of the drive bar and the number of rotation pitches (frames) of the drive bar are input to the programmable operation display. Based on this operation command,
First, the pressure of the clamping cylinder is reduced to release the screw locking force between the bowl and the adjustment ring, so that the bowl can be rotated. Then, the drive bar is pushed by one pitch and rotated by the forward movement of the ram cylinder instructed during opening and closing. Thereafter, the ram cylinder retreats, and the ram cylinder repeats reciprocating motion by the designated pitch, and then returns to the retreat limit and stops. After the opening or closing operation for the required pitch in this way, the bowl or the adjustment cap is rotated to reach the required set value, the pressure of the clamping cylinder is increased, and the screw engagement between the bowl and the clamping ring is locked. . Also,
Display of operation instructions regarding liner use, such as total actual operation time, liner wear time calculated from the set value change length, wear rate (mm / Hr), remaining allowable wear amount, and expected next liner replacement time, is displayed on the control panel every moment. Is done.

More specifically, the operation of the set adjusting device of the present invention will be described. When the bowl is rotated clockwise (clockwise), the piston rod of the right-hand ram cylinder 44A of the pair of hydraulic cylinders 44 projects. . Then, the striker 44a of the ram cylinder 44A is placed in the bowl lock 5
0, the tip of the bowl lock 50 is rotated in the unlocking (unlocking) direction of the bowl lock by overcoming the urging force of the tension coil spring 50b for tension, and a driver 44b also provided at the tip of the piston rod is adjusted. The adjustment cap 40 is rotated clockwise by one pitch in contact with one side surface of the drive bar 42 provided on the cap 40. After that, the ram cylinder 44A
The piston rod moves backward and then moves forward again to perform the same operation.
0 is rotated by one pitch. Hereinafter, the set value is changed by rotating in the same manner as the required pitch. To rotate the bowl counterclockwise (counterclockwise), the same operation is performed by driving the counterclockwise ram cylinder 44B.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of a crusher set adjusting device according to the present invention. FIG. 1 is an overall vertical sectional view of the crusher,
FIG. 2 is a partial cross-sectional perspective view of the crusher, FIG. 3 is an enlarged perspective view of main parts of the set adjusting device, FIG. 4 is a plan view of main parts of the set adjusting device, FIG. 5 is a control system diagram of the set adjusting device, and FIG. It is a principal part schematic front view of the display panel of a panel.

In the figure, 1 is a crusher, 2 is a main frame, and a vertical main shaft 4 is erected on a boss 3 at a lower central portion of the main frame 2. A cylindrical eccentric 5, which is somewhat eccentric from the center axis, is fitted to the upper half of the main shaft 4 via an eccentric bush 6, and a pine cone-shaped head 8 is further fitted via a head bush 7. Is equipped. The outside of the head 8 is also covered with a pine cone-shaped mantle 9, and the raw material is crushed between the mantle 9 and a bowl liner 21 described later. On the lower end surface of the eccentric 5, the entire load of the eccentric 5, the head 8 and the mantle 9 rotating between the pair of upper and lower thrust bearings 18 and the lower thrust bearing 19 and the compressive load during the crushing movement are transmitted to the main frame 2. At the same time, the head ball 16 sits on the spherical seat 17 at the upper end of the main shaft 4 to promote smooth rotation. On the outer periphery of the lower end of the eccentric 5, a gear 10 composed of a bevel gear is fixedly provided.
The eccentric 5 is rotationally driven by a V-pulley 14 and is rotationally driven via a pinion 11 of a bevel gear at the tip of a horizontal rotating shaft 12 which is supported by bearings 13 and 13. 15 is a feed plate,
The raw material supplied to the hopper 23 is equally distributed around the circumference.

On the other hand, an adjustment ring 22 is mounted on the upper end surface of the main frame 2 via a tapered surface, and is constantly pulled downward through a release cylinder 25 to be in close contact with the main frame 2. Four to six circumferential holes are provided between the main frame 2 and the adjustment ring 22, and the main frame pins 2 a for preventing rotation are penetrated. A right-hand taper screw is threaded on the inner peripheral surface of the adjustment ring 22 and is screwed into a bowl 20 having a right-hand taper screw similarly threaded on the outer periphery thereof.
The bowl 20 is configured to be vertically movable by the rotation of zero. Further, in order to lock the screwing of the adjustment ring 22 and the bowl 20 during operation, a clamp ring 22a screwed on the inner peripheral surface is mounted on the adjustment ring 22 in the same manner, and a piston rod is mounted. It is fastened to the adjustment ring 22, and the cylinder projects a piston rod of the clamping cylinder 24 fixedly mounted on the clamp ring 22a by hydraulic pressure, so that a strong force is applied to the contact surface of both screws. .

A bowl liner 21 is fixed inside the bowl 20 and forms a crushing chamber with the mantle 9. An adjustment cap 40 is fixedly mounted on the outer periphery of the upper end of the bowl 20 with a stud.

Next, the set adjusting device will be described.
As shown in FIGS. 3 and 4, the adjustment cap 4
On the outer periphery of 0, protruding drive bars 42 made of square bars are arranged at equal intervals. On the outside of the adjustment cap 40, there is a bowl lock 50 rotatable around the vertical shaft 50a and having a projection 50c facing inward at the center, and the projection 50c is rotationally urged in a direction in which it contacts the side surface of the drive bar. A tension coil spring 50b is elastically mounted between the fixed bracket and one end of the bowl lock 50. Therefore, unless the bowl lock 50 is unlocked,
Due to the ratchet mechanism, the tip of the projection 50c is always in contact with the peripheral wall of the adjustment cap 40, and the adjustment cap 40 cannot be rotated on the stage where the side of the projection 50c and the side of the drive bar 42 are in contact. However, by forming the other surface of the projection 50c in a tapered shape, the adjustment cap 50
When the bowl is rotated counterclockwise, the bowl lock 50 is flipped up and rotated.

A pair of ram cylinders 44 are disposed horizontally at the tip end of the bowl lock 50 so as to be rotatable about a vertical shaft 45 substantially at the center.
4, that is, the rod-side ends of the right-handed ram cylinder 44A and the left-handed ram cylinder 44B are fastened by a tension coil spring 46, and are urged so that the piston rod side faces the adjustment cap 40 side. ing. At the tip of the piston rod of the ram cylinder 44, the bowl lock 50
The striker 44 that is driven to rotate in a direction to separate from the striker 44
and a driver 44b pressing the side surface of the drive bar 42 on the piston rod.
Is attached. Therefore, the advancement of the piston rod unlocks (unlocks) the bowl lock 50 and simultaneously presses the drive bar 42, thereby rotating the adjustment cap 40. When the adjustment ring 40 is turned clockwise, the ram cylinder 44A is driven, and when the adjustment ring 40 is turned counterclockwise, the ram cylinder 44B is driven.

On the other hand, a proximity switch 70 is fixedly arranged as shown in FIG. 3 so as to face the center of the front of at least one of the drive bars 42, and as shown in FIG. It is connected to a control panel (control panel) 100 that stores a display 110 and a sequencer controller 120. From the control panel 100, the solenoid valve 62 for switching the pressure oil to the clamping cylinder 24, the solenoid valves 64 and 66 for switching the pressure oil of the ram cylinder 44 (44A and 44B), and the limit switch for detecting the retreat limit of the ram cylinder 44 6
7 and 68, and transmit an operation command and a detection signal, respectively. These are collectively called set adjusters.

The liner usage status display device 200 is
An embodiment displayed on the control panel 100 is shown in FIG. 6, which is incorporated in the control panel 100 and constantly monitors the liner usage in an operation room remote from the site. Items marked with * in the figure are operated with push buttons.
The display is a digital display with colors for all of a to h, and the mark is a lamp display. The set adjustment command is issued with the push button. A of the "rotation direction command" is set value narrow (clockwise),
B is the set value expansion (counterclockwise), and the display is displayed as “narrow” or “wide” in a. The “drive bar movement number command” is used to input the number of pitches (number of frames). The C button is a plus button, and the D button is a minus button. Each time the button is pressed, “1” is added or subtracted from b. You. When the start button is pressed after the setting is completed, the operation automatically starts, and the "Set adjustment in progress" lamp is displayed. When the set adjustment is performed for one paragraph, the lamp of "set adjustment completed" is displayed, and the lamp of "set adjustment in progress" goes out. After the operation is completed, the “set adjustment completed” lamp goes out after the hydraulic pump of the hydraulic unit stops. The "liner use limit frame number" is input by push buttons E (plus) and F (minus), and the numerical value is displayed in d. Only the number of movements on the positive side of the number of frames of the drive bar is counted in e of “number of frames used by liner”. In “f” of “operation time”, the accumulated time of the load operation is displayed. In g of “wear speed”, a value obtained by multiplying the number of liner used frames by the vertical movement allowance per drive bar frame and dividing by the operation time is displayed. The value calculated by the following is displayed for h of the “estimated time until liner exchange”.

[0015]

(Equation 1)

When the lamp of "set adjustment error" is displayed, when the clamping cylinder 24 does not drop in pressure, when the bowl 20 does not rotate even if the pushing solenoid of the ram cylinder 44 is turned on, or when the ram cylinder 44 is pulled. This occurs when a trouble occurs, such as when the limit switches 77 and 78 for retracting the ram cylinder 44 are not turned on even when the side solenoid is turned on, or when the set adjustment is not completed within a set adjustment time that has been adjusted in advance. At this time, the interlock is operated, and the raw material supply and discharge lines are completely stopped to take measures.

The operation of the crusher set adjusting device of the present invention configured as described above will be described. First, when the mantle 9 and the bowl liner 21 forming the crushing portion are worn out, a product larger than a desired product size comes out, and when it is desired to correct the set value immediately, the bowl 2 is used.
0, that is, it is necessary to rotate the adjustment cap 40 clockwise and lower it to change the set value to a smaller value. In such a case, the number of pitches (number of frames) of the drive bar 42 corresponding to the rotation direction and the descending amount is input to the programmable indicator 110 of the control panel 100 to release the pressure oil of the clamping cylinder 24,
The screw locking force between the bowl 20 and the adjustment ring 22 is released to make the bowl 20 rotatable. After that, the ram cylinder 4 corresponding to the specified rotation direction
4 is selected and the piston rod of the clockwise ram cylinder 44A is moved forward and backward by this number of times in accordance with the designated pitch number, whereby the adjustment cap 40 is rotated by a predetermined pitch number and lowered by a required amount. And the set value is changed. When increasing the set value, the same operation is repeated using the ram cylinder 44B.
After the change of the set is completed, the piston rod is retracted to the retreat limit so that the projection 50c of the bowl lock 50 comes into contact with one of the drive bars 42 and is locked. Then, the rod of the clamping cylinder 24 is again advanced and locked. The vertical movement allowance for one pitch of the drive bar is preferably set in the range of 0.5 to 1.0 mm, and the number of the drive bars 42 is preferably selected. The forward limit of the ram cylinder 44 is detected by the proximity switch 70, and the backward limit is detected by the limit switches 67 and 68. The above-mentioned pitch number, that is, the number of times the ram cylinder is operated is counted by the proximity switch 70. Proximity switches may be used for the limit switches 67 and 68 for backward limit detection.

In this way, every time the set value needs to be changed, a command is transmitted to the hydraulic unit 60 operated by the clamping cylinder 24 or the ram cylinder 44 via the control panel 100 to perform remote control. In addition, the set value can be easily changed in a short time by automatically rotating the adjustment cap 40 during operation.

The stationary adjustment ring 22
In contrast, the bowl 20 is provided so as to be vertically slidable, and a plurality of vertical hydraulic cylinders are provided circumferentially between the bowl 20 and the bowl 20.
It is also conceivable that the set value can be changed by raising and lowering the pressure, but in this case, the hydraulic oil must always be filled in the hydraulic cylinder in order to maintain the specified set value. However, it is impossible to completely eliminate the leakage of the pressure oil in the hydraulic cylinder for a long period of several months to one year, and the set value changes in accordance with the amount of the leakage, which is not preferable. On the other hand, in the present invention, the adjustment ring 22 and the bowl 20 are screwed together, and the screw rotation is locked by the bowl lock 50, so that the above-described inconvenience does not occur, which is excellent.

[0020]

As described above, the crusher according to the present invention automatically enters the drive bar, the bowl lock, and the ram provided on the adjustment cap only by inputting the rotation direction and the pitch number of the drive bar to the control panel. By operating the cylinder, the bowl can be automatically and easily rotated by remote control during operation to raise and lower the bowl by adjusting the adjustment ring, and the set value can be changed to any value. Maintainability can be significantly improved. Further, since the screwing of the adjustment ring and the bowl is locked after the setting is completed, the set value is not changed, and the uniformity of the product size is maintained. Further, since the liner use status display device is provided, normal operation management is very easy to perform, and driving operability is improved.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a crusher showing one embodiment of the present invention.

FIG. 2 is a partial sectional perspective view of a crusher showing one embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a main part of a crusher set adjusting device showing one embodiment of the present invention.

FIG. 4 is a plan view of a main part of a crusher set adjusting device showing one embodiment of the present invention.

FIG. 5 is a control system diagram of a crusher set adjusting device showing one embodiment of the present invention.

FIG. 6 is a schematic front view of a main part of a control panel display panel of a crusher showing one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 crusher 2 main frame 2a main frame pin 3 boss 4 main shaft 5 eccentric 6 eccentric bush 7 head bush 8 head 9 mantle 10 gear 11 pinion 12 rotation shaft 13 bearing 14 V pulley 15 feed plate 16 head ball 17 spherical seat 18 upper thrust Bearing 19 Lower thrust bearing 20 Bowl 21 Bowl liner 22 Adjustment ring 22a Clamping ring 23 Hopper 24 Clamping cylinder 25 Release cylinder 40 Adjustment cap 42 Drive bar 44 Ram cylinder 44a Striker 44b Driver 44A Ram cylinder for clockwise 44B Counterclockwise Ram Cylinder 45 Vertical Shaft 46 Tension Coil Spring 50 Bowl Lock 0 hydraulic unit 62 solenoid valve 64 solenoid valve 66 solenoid valve 67 limit switch 68 Limit switch 70 proximity switch 100 control panel 110 programmable operation display unit 120 sequencer control unit 200 liner usage display device

Claims (1)

(57) [Claims] 1. A main frame, an adjustment ring mounted on the main frame and having an inner peripheral surface screwed therein, and an outer peripheral surface screwed up and down to be vertically engaged with the adjustment ring. A bowl, a main shaft disposed on the center bottom of the main frame and vertically or substantially vertically supported through a boss, and an eccentric which is fitted to the main shaft via a bearing and eccentrically rotates with respect to a vertical axis. A crusher having a rotating head fitted to the eccentric via a bearing, and a rotating drive means for the eccentric, wherein a circumferential surface is provided on a side surface of an adjustment cap having a cylindrical surface and disposed at an upper end of the bowl or the bowl. A plurality of drive bars protruding at equal intervals, and being rotatable about a vertical axis in contact with the drive bars and having a spring force. A ratchet mechanism for restraining rotation of the bowl via a rotation mechanism, and a ratchet mechanism disposed horizontally outside the bowl or the adjustment cap so as to be rotatable about a vertical axis, and by pressing a side surface of the drive bar to turn the bowl clockwise or A pair of hydraulic cylinders for rotating counterclockwise, a proximity switch disposed opposite at least one of the drive bars adjacent to the drive bar, a hydraulic unit for driving the pair of hydraulic cylinders, A liner set adjuster consisting of a programmable operation display that gives operation commands to the unit and a control panel containing a sequencer controller is provided, and the operating time, wear, wear rate, remaining allowable wear, and liner replacement of the liner Liner usage status display function such as estimated time Crusher to comprising the usage display device.