JPS6229595B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drill rod guide for a drilling machine, comprising a frame, a gap for the drill rod, supported on the frame so as to be able to be displaced by means of a support arm, and comprising a gap for the drill rod. a coupling device for coupling the supporting arms to each other so as to displace both the jaws in opposite directions when opening and closing the gear; and at least one actuating device for displacing the jaws. Regarding information.

In drilling operations using split drill rods, guides of the type described above are commonly used when joining and disconnecting the individual drill rods (drill bar and drill pipe). These guides lock and secure the sleeve between the drill rods,
Also provides drill guidance during drill work. The holding guides currently in common use do not align the drill rod with the drilling work center, are complex in structure with many bearings and couplings that are subject to wear, and are difficult to lock. The weight is large compared to the force.

Swedish Patent Specification No. 215154 discloses that both support arms of one jaw are slidably mounted in a frame, and the support arms are connected to a piston rod of a pressure fluid cylinder fixed to the other jaw. , which describes a guide by which both the jaws are displaced toward and away from each other. The pressure fluid cylinder is displaceable between two limit position stops provided in the frame. The unit formed by the jaw, the support arm and the pressure fluid cylinder is displaced relative to the frame within the intermediate position of the jaw, so that when the jaw is closed, they are displaced only when the cylinder engages one limit position stop. The drill rod is aligned using the drill rod.

Swedish Publication No. 391769 describes such a guide comprising two jaws mounted in a frame which can be displaced towards and away from each other along a guideway. These jaws have a connecting rod attached to each jaw by a ball and socket joint;
It is coupled to a pressure fluid cylinder via a swing arm mounted within the frame. Since the jaws are displaced in the same direction relative to the frame, they do not automatically align the drill rod.

Finnish patent specification no. The guide is described as being connected to the pressure fluid supply channel of the. These jaws do not self-center the drill rod because displacement of one jaw does not result in a corresponding displacement of the other jaw in the opposite direction.

The purpose of the present invention is to eliminate the above-mentioned drawbacks,
To provide a guide that allows reliable alignment of a drill rod to a drill work center. This object is achieved in the guide according to the invention, in which the coupling device comprises transmission wheels mounted in the frame, these transmission wheels being such that the movement of one jaw with respect to the frame causes the movement of the other jaw in the opposite direction to the frame by an equal distance. This is achieved by means of a guide which engages the supporting arms of the jaws for movement relative to the guide and is characterized in that at least one of the jaws is actuated by an actuating device.

The invention ensures that the movement of one jyo relative to the frame always causes the other jyo to move relative to the frame by the same distance, but in the opposite direction.
The idea is to actively control the movement of these Jiyo. This idea can be realized by a simple gear mechanism in which the intermediate gear mounted in the frame ensures the movement of the jaw. Reliable alignment of the drill rod to the drill work center is made possible by the guide of the invention. This guide is lightweight for locking forces, since its jaws and its support arms have only linear movements, and it has no joints that can wear. This guide has a flat shape,
Also, since it is very short in the direction of drilling, the overall length of the feed device is shortened.

The invention will be understood in more detail from the description that follows with reference to the accompanying drawings.

1 and 2 show a preferred embodiment of the guide according to the invention. This guide 0 is fixedly mounted at the end of the feed beam S of the drilling device, along which the drill machine driving the drill rod is displaced during the drilling operation.

The guide 0 comprises a plate-like frame 1 and two mutually displaceable jaws 2 and 3. These jaws have slot-shaped gaps 2a, 3a (third
), and with these gaps, Jiyo is
It engages the drill rod sleeve during mating and uncoupling of the drill rod, and aligns the drill rod with the drilling work center while drilling is being performed.

One jaw 2 has bores 6 and 7 in the frame 1.
It is fixed to two parallel cylindrical support arms 4, 5 which are slidably mounted in the. The other jaw 3 is similarly fixed to a cylindrical support arm 8 which is slidably mounted in a bore 9 in the frame.
Furthermore, the frame 1 is provided with a guide surface 10 that guides the jaw 3 and prevents the support arm 8 from rotating in the bore 9.

The support arm 8 of the jaw 3 is fixed to a piston rod 11 which is its axial extension. The piston 12 of this piston rod is displaced within a cylinder 13 within the frame. This cylinder is cover 1
4 is closed. Reference numbers 15 and 16 are
2 shows a connection device for supplying or discharging pressurized fluid to or from the cylinder depending on the direction of movement of the piston; This connection device is connected to a source of pressure fluid by a conduit through a valve that controls which side of the piston the pressure fluid is delivered to.

The support arm is provided with mutually opposing teeth. That is, the support arms 4, 5 of the jaw 2 are provided with teeth 17 and 18, respectively, and the support arm 8 of the jaw 3 is provided with teeth 19 and 20 pointing in mutually opposite directions. These teeth form pairs and engage with the two gears 21 and 22, one pair each. These gears are respectively mounted on shafts 23, 24, which are arranged between support arms 4 and 8 and between support arms 5 and 8, respectively.
and those supporting arms 4, 5, 8
is supported by the frame 1 at right angles to the plane in which it is set.

In FIG. 3, the jaws 2, 3 are shown in an intermediate position. When the pressure fluid is delivered to the rod side chamber of the piston inside the cylinder 13, the piston rod 11 pulls the support arm 8 and the jaw 3 away from the first jaw 2, whereupon the support arm 8
The action of the teeth causes both gears to rotate around their respective axes. Since the rotation of these gears moves the support arms 4 and 5 of Jyo 2 by the same length in the direction opposite to the direction of movement of support arm 8, Jyo 2 and 3 move away from each other until they reach the maximum open position. Displace.

When the pressure fluid is delivered to the opposite side of the piston inside the cylinder 13, the piston rod pushes the support arm 8 and the jaw 3 towards the first jaw 2, where the action of the teeth of the support arm 8 causes both gears to move again. rotate around each axis. The rotation of these gears moves the support arms 4 and 5 of the Jyo 2 by the same distance to the support arm 8.
Since the jaws 2 and 3 are moved in the direction opposite to the direction of movement, the jaws 2 and 3 are displaced toward each other to the maximum closed position.

In the above structure, the gears 21 and 22 rotate themselves but remain fixed relative to the frame 1. Therefore, even if the jaws 2 and 3 move relative to each other, the center A between the gaps 2a, 3a of these jaws is always aligned with the drilling working center PK of the drilling machine shown in FIG. This ensures that the drill rod is aligned with the drilling work center.

The embodiment shown in FIGS. 6 to 9 differs from the previous embodiment only with respect to the position of the actuating device.

In FIG. 6, the pressure fluid cylinder 63 included in the actuating device is shown as a separate unit in the frame 1.
mounted on top. The piston rod of the cylinder is connected to the support arm 8 of the inner jaw 3.

In FIG. 7, the actuating device comprises two pressure fluid cylinders 73, 73' mounted on the frame 1 as separate units. The piston rod of each cylinder is connected to a support arm 4 and 5 of the outer jaw 2, respectively.

In FIG. 8, the actuating device comprises two pressure fluid cylinders 83, 83' whose cylinder bores are formed directly in the frame 1, as in FIG. The piston rod of each cylinder is on the outer side 2.
are connected to support arms 4 and 5, respectively.

In FIG. 9, the pressure fluid cylinder 93 included in the actuating device is shown as a separate unit in the frame 1.
mounted on top. The piston rod of the cylinder is connected directly to the outer jaw 2.

Also, if desired, an actuator could be assembled to actuate the support arm of each jaw, for example by combining the structures of FIGS. 2 and 8 in the same device.

In the structure of FIG. 10, no separate piston is used, but the ends of the support arms 4, 5, 8 are made to act as pistons at the same time. Seals 104, 105, 108 are attached to these support arms,
These seals then seal the support arms in respective cylinder bores 103, 103', 103'' formed in the frame body and serving as pressure fluid cylinders.

In this structure, the pressure fluid is connected to the bores 103 and 1.
By feeding into 03' and moving support arms 4 and 5 outwardly, jaws 2 and 3 are opened. Similarly, by supplying pressure fluid into the bore 103'' and moving the support arm 8 outward, the jaws 2 and 3
is closed.

In this construction, the movement of either arm 4 or 5 is transmitted through a gear mechanism to the other arm 5 or 4, causing a corresponding displacement, so that only one of the arms is required to open the jaw. You may also use it.

The drawings and related description herein are merely illustrative of the ideas of the invention. The guide according to the invention is therefore capable of various modifications in its details within the scope of the claims.

[Brief explanation of the drawing]

1 and 2 are a schematic side view and an end view showing the operating principle of the guide according to the present invention, FIG. 3 is an enlarged partial sectional end view showing the detailed structure of the guide in FIGS. 1 and 2, and FIG. The figure is a side view of the guide, and Figure 5 is the V of Figure 3.
The sectional views taken along the line -V and FIGS. 6 to 10 are drawings showing modified embodiments of the guide. 0...Drill rod guide, 2, 3...Jiyo,
4,5,8...Jyo support arm, 11...Piston rod, 12...Piston, 13,63,73,
83, 93, 103...pressure fluid cylinder, 1
7, 18, 19, 20... tooth, 21, 22... gear, 104, 105, 108... seal.

Claims (1)

Claims: 1 a frame 1, two jaws 2, 3 supported on the frame so as to be able to be displaced by support arms 4, 5, 8 and provided with gap 2a, 3a for a drill rod; a coupling device for coupling the support arms to each other so as to displace the jaws in mutually opposite directions when opening and closing the gear;
and at least one for displacing the jyo.
Actuation devices 11, 12, 13, 63, 73, 7
3', 83, 83', 93, 103, 103', 1
In the drill rod guide 0 for a drilling machine with 03'', the coupling device comprises transmission wheels 21, 22 mounted in the frame, these transmission wheels being such that the displacement of one of the jaws relative to the frame is engages the support arms 4, 5, 8 of the jaws 2, 3 so as to displace the other jaw in the opposite direction by the same distance relative to the frame, and at least one of the jaws 2 or 3 Actuation devices 11, 12, 13, 63, 73, 73',
83, 83', 93, 103, 103', 103''
A guide characterized by being operated by. 2. The guide according to claim 1, wherein the transmission wheels 21, 22 are gears, and the support arms 4, 5, 8 are racks that mesh with the gears. 3. In the guide of claim 2, characterized in that the support arms 4, 5, 8 are mounted in parallel bores 6, 7, 9 made in the frame 1. guidance. 4 In accordance with claim 1, the actuating device 11, 12, 13 comprises a pressure fluid cylinder 13, the piston rod 1 of which
1 is connected to the supporting arm 8 of the other jog 3. 5. In the guide of claim 1, the actuating device 73, 73', 83, 83' comprises two pressure fluid cylinders, the piston rods of which are connected to the supporting arm 4, Guide characterized in that it is combined with 5. 6. Guide according to claim 1, characterized in that the actuating device (93) comprises a pressure fluid cylinder, the piston rod of which is connected to the first jaw (2). 7. In the guide of claim 1, the actuating device 103, 103', 103'' comprises three pressure fluid cylinders, the pistons of which are connected to the support arms 4, 5, 8 of both the jaws. 8. The guide according to claim 7, characterized in that the support arms 4, 5, 8 of the jaw operate as pistons in the cylinder. 9. Patent In the guide of claim 4, 5 or 6, the one cylinder 13 or a plurality of cylinders 83, 83', 103, 103',
103'' are respectively formed in the frame 1. 10 Claims 4, 5 or 6
In the guidance of the section, the one cylinder 63, 93
Or a guide characterized in that a plurality of cylinders 73, 73' are respectively attached to the frame 1.