JPS5840640B2 - Control device for rock drilling machine with rotating boom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a rock-drilling rock-drilling machine equipped with a rotary boom in which a guide shell of the rock-drilling rock-rock rotates together with the boom or a boom inner cylinder, and in particular, in a hydraulically controlled rock-drilling rock-drilling machine, a control device for controlling a rotary boom. A rotary valve is connected to the rotary shaft, and the rotary valve switches between the vertical direction and the horizontal direction, which change with the rotation of the boom, so that the direction of the guide shell operated by the operation of the elevation operation valve and the swing operation valve is always in the same direction. so that it becomes

In general, the rotary boom used for rock drilling was developed to compensate for the drawbacks of conventional booms, in which the guide shell interferes with the boom and creates a blind spot, which limits the horizontal drilling range. Broadly speaking, there are three types:

(A) It is called a guide rotary boom, and only the guide shell rotates without the boom CB)
It is called a rollover boom, and the inner cylinder of the boom rotates together with the guide shell. Since the elevating cylinder and the swing cylinder that determine the direction of the guide shell do not rotate and are located on the boom side, the control position of the guide shell in the elevating and turning direction does not change even if the guide shell is rotated. However, since the rotation mechanism that rotates the guide shell is located at the attachment part of the guide shell, the weight of the tip becomes large, the boom becomes thick, and the device becomes large.

The rollover boom at this point (B) (Fig. 1) and (○
In the rotary boom (not shown), since the rotation mechanism is located at the base of the boom, the boom can be made thinner and the device can be made smaller. Since the cylinder and the swing cylinder rotate together with the boom, there is a drawback that the control direction changes as the boom rotates.

For example, as shown in FIG. 3I, when the rock drill 1 is positioned above the guide shell 2, the direction in which the elevation cylinder 7 for the guide shell 2 in FIG. 1 extends is the direction in which the front of the guide shell 2 ascends. (in the direction of arrow a),
As the boom inner cylinder 11 rotates, the image shown in Fig. 3 ■ or ■
When it reaches the state of , the direction changes.

That is, in FIGS. 1 and 3, the boom inner cylinder 11 is 90
° When rotated clockwise, the position is as shown in ■・, and the rock drill 1' is located on the right side of the guide shell 2', and when the elevating cylinder 7 is extended, the guide shell 2' points its tip to the right (in the direction of arrow C in Fig. 2). ), and the direction of the boom inner cylinder 11 is 9
Corresponding to the direction in which the swing cylinder 8 was extended before being rotated 0 degrees to the right, when the boom inner cylinder 11 is similarly rotated 90 degrees to the left and the elevating cylinder 7 is extended, the guide shell 2 turns its tip to the left (see Fig. 2). This causes the boom inner tube 11 to rotate 90 degrees to the left.

This corresponds to the direction in which the swing cylinder 8 is retracted before the boom inner cylinder 11 is rotated 90 degrees to the left.

In this way, in a rotating boom, the direction of elevation and rotation of the guide shell 2 changes depending on the rotational position of the boom 3 or the boom inner cylinder 11, so the operator must judge the movement of the guide shell 2 based on the attitude of the boom. The guide shell 2 must be controlled in a predetermined direction by selectively operating the elevation operation valve 5 or the swing operation valve 6.

Even if the operator gets used to this operation, it is difficult to handle, and the time required for correction operations is a great loss.

This invention specifically solves these problems of rotary boom operation.

Therefore, the purpose of this invention is to control the elevation operation valve in the direction of raising and lowering the tip of the guide shell, and the swing operation valve to control the tip of the guide shell in the direction of turning left and right, no matter what position the rotary boom rotates. It is therefore an object of the present invention to provide a device which makes it possible to quickly and easily determine the direction of a guide shell, and to reduce the burden of judgment on the part of the operator. An object of the present invention is to provide a device that reduces the risk of erroneous operation.

That is, in the present invention, as in the illustrated embodiment, a boom 3 that supports a guide shell 2 of a rock drill 1 is provided so as to be able to rotate up and down, and the boom 3 including its support part rotates or the inner cylinder of the boom 3 rotates. 11 is a rock drilling rock 1 equipped with a rotary boom that can rotate including a guide shell 2, a rotary valve 4 is connected to an extension of a boom rotation shaft 31, and the vertical direction and left and right direction of the guide shell 2 are adjusted respectively. Pipe lines 9 and 10 are connected via the rotary valve 4 between the elevation cylinder 7 and the rotation cylinder 8, which control the elevation operation valve 5 and the rotation operation valve 6, and the elevation cylinder 7 and rotation cylinder 8, which give vertical and horizontal movements to the guide shell 2. The rotary valve 4 switches between the vertical direction and the horizontal direction, which change with rotation, so that the direction of the guide shell 2, which is operated by the operation of the elevation operation valve 5 and the swing operation valve 6, is always sagging in a constant direction. This relates to a control device for Iwatsuki drilling which has a rotating boom.

Embodiments of the invention will be described with reference to the drawings.

In FIGS. 1 and 2, a rock drill 1 is slidably mounted on a guide shell 2 and is given forward and backward movement by a feeding device, which is shown in the drawings.

The guide shell 2 is pivotally connected to the elevating body 13 by a pin 12, and is supported by passing a rotation cylinder 8 between the elevating body 13 and the elevating body 13.

Further, the elevating body 13 is pivotally attached to the tip of the boom inner cylinder 11 by a pin 14 so as to be able to be elevated, and is supported between the boom inner cylinder 11 via a link 15 and an arm 16, and the elevating cylinder 7 is pivotally connected to the elevating body 13. It is possible to look up.

The boom inner cylinder 11 is rotatably fitted into the boom 3, and its end engages with a rotation actuator 18, whereby rotation is applied.

The boom 3 is provided with a rotation actuator 18, one end of which forms a U link 19 and is pivotally connected to a pedestal 21 by a pin 20 so as to be able to rise and rise, and is supported by passing a boom elevation cylinder 22 between it and the boom 3. .

The pedestal 21 is rotatably connected to the yoke 24 by a king pin 23, and a boom rotation cylinder 2 is connected between the pedestal 21 and the yoke 24.
5 and is supported.

In order to drill a hole at a predetermined position, the boom elevation cylinder 22 and the boom rotation cylinder 25 are extended and contracted by a hydraulic control circuit (not shown) to give elevation and rotation to the boom 3 relative to the yoke 24 to guide it. After determining the position of the shell 2 and then determining its direction by expanding and contracting the elevation cylinder 7 and the swing cylinder 8 of the guide shell 2, the rock drill 1 is operated to perform drilling.

Here, the elevation angle and rotation angle of the boom 3 and the arm 3
The length of the drilling rock 1 determines the possible drilling range of the drilling rock 1, but in the case of a type of boom that is not a rotating boom, the front drilling range of the drilling rock 1 is on one side with respect to the boom center 26, as shown in Fig. 10. However, in the rollover boom, the guide shell 2 can rotate to the position shown in Figure 3 (■) or ■, so there is no interference with the boom 3, and the 10
This enables a wide, almost circular drilling range including the shaded area 28 in the figure.

Here, in order to eliminate the above-mentioned disadvantage that the elevation and rotation direction of the guide shell 2 change, in this invention, the rotational position of the boom inner cylinder 11 is set within the conditions.

For comparison, FIG. 4 shows a control hydraulic enclosure for a conventional rotary boom or rollover boom.

FIG. 4 is a hydraulic circuit diagram in which the direction of the guide shell is determined by directly controlling the elevation cylinder 7 and the rotation cylinder 8 by operating the elevation operation valve 5 and the rotation operation valve 6 of the guide shell, respectively. .

5 and 6 show a control device according to the present invention.

In FIG. 6, a valve case 30 is connected to the base of the boom 30, and the rotation of a rotating shaft 310, which is an extension of the boom inner cylinder 11, is transmitted to the rotating valve body 29 via a joint 32,
A rotary valve 4 is formed.

In the circuit diagram of FIG. 5, KA-A, B-B t C-C,
D-ri represents the cross section of each part in FIG.

In the hydraulic circuit shown in FIG. 5, the main pipe line 9 coming out of the swing operation valve 6 is connected to the port 33 of the valve case 30, and from the port 34 of the valve case 30 is passed through the double pilot check valve 35 to the head side of the swing cylinder 8. A conduit 39 is connected to.

The other pipe 9' coming out from the swing operation valve 6 is connected to the valve case 3.
Connect to port 36 of 0, port 37 of this valve case
from the swing cylinder 8 via the double pilot check valve 35
A conduit 39' is connected to the rond side.

On the other hand, the main pipe 10 coming out from the elevation operation valve 5 is connected to the valve case 30.
A pipe line 40 is connected from the port 41 of the valve case 30 to the head side of the elevating cylinder 7 via a double pilot check valve 42.

The other conduit 10' coming out of the elevation operation valve 5 is connected to port 43 of the valve case 30.
4, a pipe line 40' is connected to the rond side of the elevating cylinder 7 via a double pilot check valve 42.

Then, the pipe line 47 is connected to the valve case 3 through the double pilot check valve 46 from the branch points 45 and 45' of the pipe lines 39 and 39'.
Connect the pipe line 47' to the port 48 of the valve case 30, and connect the pipe line 47' to the port 49 of the valve case 30, and connect the pipe line 47' to the port 49 of the valve case 30 from another branch point 50.50' of the 'pipe line' 39. line 52 to port 53 of valve case 30;
' are connected to ports 54, respectively.

On the other hand, the pipe line 40°40 connected to the elevation cylinder 7
' branch point 55.55' to double pilot check valve 5
6, the pipe line 57 is connected to the port 58 of the valve case 30, and the pipe line 57' is connected to the port 59, respectively.

Further, a conduit 61 is connected to a port 62 of the valve case 30, and a conduit 61' is connected to a port 63 from the branch point 55, 55' through another double pilot check valve 60, respectively.

As shown in FIG. 6, long grooves 64, 65, 66, and 67 are carved in the circumferential direction on the outer periphery of the rotary valve body 29.
an axial groove 64' from each part;

65', 66', and 67' to reach short grooves 68°, 69, 70, and 71 in the circumferential direction.

The state shown in FIG. 5 now represents the state shown in FIG. If the pressure oil is sent to the main pipe 9, the pressure oil will flow through the port 33 of the rotary valve 4 and the long groove 64.
, 64', the short groove 68, and the port 34 to follow the conduit 39, and then pass through the double pilot check valve 35 to the head side of the swing cylinder 8 to extend the cylinder.
Turn the tip of guide shell 2 to the right (direction of arrow C) in the figure.
Swirl.

At this time, the return oil on the Rondo side of the swing cylinder 8 passes through the pipe 39', the double pilot check valve 35, the port 37 of the rotary valve 4, the short groove 69, the long groove 65°65', and the port 36.
, and returns to the oil tank 72 via the drain passage of the swing operation valve 6 via the pipe 9'.

In this state, when the boom inner cylinder 11 is operated to rotate by a control circuit (not shown) and rotated to the position shown in FIG. .

Figures 7, 8, and 9 are developed plan views of the A-A section in these states, that is, Figure 7 is the 3rd
This is a developed plan view corresponding to the state shown in FIG. 3, and FIG. 8 is a developed plan view corresponding to the state shown in FIG.

Ports 33 and 34, which communicated in FIG. 7, are cut off in FIG. 8, and port 33 communicates with port 62.

Therefore, the pressure oil from the pipe 9 flows from the port 33, 62 to the pipe 61, the double pilot check valve 60. It reaches the head side of the elevating cylinder 7 through a conduit 40, and is operated in the direction of extending the cylinder.

This direction corresponds to the direction of arrow C in FIG. 2, and the boom inner cylinder 11 moves in the same manner as before the rotation.

The other ports are also switched in the same manner.

As is clear from the above description, according to the present invention, even if the vertical and horizontal relationships between the guide shell and the rock drill change due to the rotation of the boom inner cylinder 11, the same operation and control in the same direction can always be obtained. Operability is greatly improved.

It also makes it easier for one worker to decide on the direction and make decisions quickly.
This has the effect of reducing erroneous operations.

In addition, at the intermediate position between I and π in Figure 3, or between (I) and persimmon, the length and arrangement of the short grooves can be appropriately selected for each port position to ensure that they are always the same. Directional control can be performed.

[Brief explanation of drawings]

Fig. 1 is an elevational view of a rollover boom equipped with a device according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3, and I
, n, and m are sectional views taken along the line E-E in Fig. 1, Fig. 4 is a hydraulic circuit diagram of a conventional elevating and rotating section, Fig. 5 is a hydraulic circuit diagram according to the present invention, and Fig. 6 is a vertical cross-section of a rotary valve. Top view, Figure 7 is A of Figure 6
-A line development view, FIGS. 8 and 9 are diagrams showing the displacement of the groove in FIG. 6 due to rotation of the boom, and FIG. 10 is a diagram showing the front drilling range. In the figure, 1 is a rock t, 2 is a guide shell, 3 is a boom,
4 is a rotary valve, 5 is an elevation operation valve, 6 is a rotation operation valve, 7 is an elevation cylinder, 8 is a rotation cylinder, 9.10 is a main pipe, 1
1 is a boom inner cylinder, and 31 is a boom rotating shaft.

Claims (1)

[Scope of Claims] 1. A boom supporting a guide shell of a rock-cutting rock is provided so as to be able to rotate up and down, and the boom including its support part rotates, or the inner cylinder of the boom including the guide shell is rotatable. In rock drilling equipment equipped with a rotary boom, a rotary valve is connected to the extension of the boom rotation axis, and the guide shell is installed in the vertical and horizontal directions. A conduit is connected via the rotary valve between the elevation operation valve and the rotation operation valve that control the direction and the rotation operation valve, and the elevation cylinder and rotation cylinder that give vertical and horizontal movements to the guide shell, respectively, and the vertical direction that changes according to the rotation of the boom. and the left and right directions by the rotary valve, so that the direction of the guide shell operated by the operation of the elevation operation valve and the swing operation valve is always in the same direction. Device.