JP2707518B2 - Ram drilling machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a ram drilling machine provided with a tubular casing, a hitting tip, and a transmitter for checking the traveling direction.

2. Description of the Related Art Self-propelled ram drills, such as those known from German Patent Specification No. 2157295, foremost, above all, cut supply pipes, such as water pipes, cables, etc., on road surfaces and on the ground. Used to lay under roads, embankments, buildings or obstacles. This is done in such a way that the ram drilling machine advancing underground leaves the soil laterally leaving a drag, into which feed pipes are withdrawn simultaneously or later. In some cases, the movable hitting tip, or the cutter located at the tip of the drilling machine, will break the rocks or other obstacles during the forward movement of the ram drilling machine and push it aside with the soil, i.e. the casing that will be fed. To help you develop your career. However, there is a risk that the ram drill will encounter obstacles and deviate from the desired direction.

A suitable ram drilling machine in the direction of travel is
No. 2242605, which has a tubular curved extension at the rear end, which has a curved guiding surface,
Thus, the curvature of the path and the curvature of the underground drilling are achieved. It is necessary to excavate such a curved underground drilling when, for example, the sidewalk is narrow and the road is too narrow to excavate the start groove or the target groove. It must be deep enough to be able to be installed horizontally within and pass under all conduits below the road surface. The rigid guiding surface thus serves to enable the intended underground drilling curvature before the drilling machine is installed. During operation, this direction cannot be adjusted and in particular no change in direction can be observed.

In order to check the direction of travel and thereby increase direction stability, Tracto-Technik Ltd.
GmbH), “Tractuell” No. 1, 1
Experiments using a position detection device as described in the July 983 publication have already been performed. This position detecting device operates in a transducer system. However, as confirmed in this experiment, for example, the transmitter arranged outside the casing and in front of the casing rear end or in the drilling machine casing requires cumbersome assembly,
There is still room for improvement in confirming the change in the traveling direction. In particular, when the battery-powered transmitter is provided in an embedded material made of an electrically insulating material, that is, a material that transmits electromagnetic waves, assembly and manufacturing costs exceeding the standard are incurred.

[Problems to be Solved by the Invention] An object of the present invention is to provide a ram drilling machine that can eliminate the above-mentioned disadvantages and can easily improve directional stability.

According to the invention, this problem is solved by providing the drilling machine with a transmitter arranged as far forward as possible in the direction of excavation. If the transmitter is advantageously arranged in the striking tip, or if the striking tip is configured as an axially movable cutter, and preferably the transmitter is arranged in the cutter, the direction of travel is surprisingly surprising. It has been found that the change of the drill can be found directly at the place where the change occurs, ie at the tip or cutter, ie where the deflection of the drilling machine from its desired direction of travel first appears. This makes it possible to adjust the change in direction of travel, ascertained by the receiver outside of the ground, as appropriate, for example, by means of control measures, and to adjust the direction of excavation again before the deflection becomes too great. On the other hand, at best, the transmitter located at the rear end in the drilling machine casing, at best, can only further correct the direction of travel after the directional deflection has already become considerable, this deflection The closer to the rear end, the larger it becomes.

[Means for Solving the Problems] It is possible to detect a depth position and a lateral position by using a transmitter. Furthermore, it is possible to measure the inclination of the drilling machine with respect to the longitudinal axis of the drilling machine casing, in particular the rotational or angular position of the striking tip, in the case of a drilling machine in which the striking tip is rotatable, and in some cases the part of the striking tip. it can.

Arranging the transmitter as far forward as possible can advantageously provide an axial frontal hole in the hitting tip or cutter, in which the transmitter and possibly a voltage source can be provided. The hole can be closed with a lid. Thus, the transmitter and the batteries required to power it can be housed in a room that can be easily drilled and manufactured. To make this chamber accessible, for example for battery replacement or transmitter replacement, it is only necessary to remove the lid. The lid should consist of a hardened material as well as a cutter or hitting tip for increased wear resistance.

The battery can be housed and protected in a battery box that can be inserted into the front hole. It is desirable to engage the transmitter's journal within the battery box and to secure the battery box and the transmitter between the spring, preferably supported by the blind end of the front hole and the spring supported by the lid. This not only makes the structure of the transmitter unit denser, but also provides sufficient electrical contact between the battery and the transmitter by means of a spring, while allowing the transmitter unit to elastically bend in the front hole to reduce vibration. It can be absorbed and compensated for.

If the wall of the front hole is provided with an outwardly open groove, the emission of electromagnetic waves emitted from the transmitter, and hence the electromagnetic waves outside and underground, will be better. Since the transmitter is arranged in the overhanging impact tip or the overhanging cutter end, the electromagnetic wave can be directly incident on the ground outward, that is, the electromagnetic wave transmits through as large a portion of the casing section as possible. You don't have to.

The lid engages the journal with the front hole and can be locked using a cutter wall and a clamping pin inserted into the radius hole of the journal. Therefore, in assembling, it is only necessary to pull out the fastening pin from the hole, and thus the front hole is opened, so that the transmitter and the battery box or the battery can be freely reached by the operator.

The striking tip may be provided with a groove, which is preferably closed with a wear-resistant material which is transparent to electromagnetic waves, for example preferably a cold-cured synthetic resin / metal powder or ceramic powder mixture. The striking tip can also be at least partly made of magnetic steel, in which case it has a sufficiently wear-resistant armor, if necessary, for example, an outer layer of a wear-resistant material that impairs the transmission of electromagnetic waves at all or only slightly. .

EXAMPLES The present invention will be described in detail below based on illustrated examples.

The ram punch 1 has a tubular casing 2 as a whole, and is connected to a pressure medium source, not shown, such as a compressor, by a pressure medium hose 3 connected to the rear end. In the front part, the part protruding from the casing 2 is formed as a step head, and the cutter 4
A striking tip 5 equipped with is mounted in the casing 2 slidably in the axial direction. The striking tip 5 is pushed forward by the cutter 4 under the action of a striking piston (not shown) axially inserted into the casing 2, and advances underground 6.
In doing so, the cutter 4 crushes rocks or other obstacles and pushes the soil 6 away. Only then is the casing 2 retracted in the excavation direction 7 and thus an underground drilling 8 is excavated in the underground 6. A transmitter unit 9 is arranged at the front end of the ram drilling machine 1 in the excavation direction 7, that is, in the cutter 4, and cooperates with a receiver 10 above the underground 6.

FIG. 2 shows details of the transmitter unit 9. It comprises one transmitter 11 and two batteries 12, which are arranged in a battery box 14 with a conical helical spring 13 in contact with the positive electrode of one of the batteries 12. In the transmitter 11, the journal 15 is engaged in the battery box 14. The cutter 4 has a front hole 16 for receiving the transmitter unit 9, i.e., the battery box 14 and the transmitter 11 fitted therein. The battery box 14 and the transmitter 11 have the first compression spring 18 supported by the blind end 17 of the front hole 16 and the front hole after the transmitter unit 9 is assembled.
It is fixed between a second compression spring 20 supported by a lid 19 closing 16. Reliable installation of the transmitter unit 9 in the front hole 16 of the cutter 4 is achieved by means of a clamping pin 21 which has a radial hole 22 in the cutter wall 23 and a lid which is aligned therewith after the lid 19 is fitted. The 19 journal 25 is inserted into the radial hole 24.

Since the ram drilling machine 1 has the transmitter 11 in the cutter 4 protruding from the hitting tip 5 as far as possible in the drilling direction 7, the directional deviation of the ram drilling machine 1 is in place.
In other words, the corrective action or the directional stabilization measure can be confirmed as soon as possible by the cutter 4 and can be started immediately after the occurrence of the direction deviation. In order to allow the electromagnetic waves of the transmitter unit 9 to penetrate as far as possible into the ground 6 and then to the surface of the ground (see FIG. 1), the cutter wall 23 is provided on the wall adjacent to the transmitter 11 in the installed position. The body region has an axial groove through which electromagnetic waves can pass without hindrance.

[Brief description of the drawings]

FIG. 1 is a longitudinal view of a ram drilling machine which has a transmitter at the front end in the excavation direction according to the present invention and excavates underground drilling in the ground, and FIG. 2 is a front end of the drilling machine of the ram drilling machine shown in FIG. FIG. 1 ... ram drilling machine, 2 ... casing 5 ... tip of impact, 11 ... transmitter

Claims (8)

(57) [Claims] In a ram drilling machine having a tubular casing, a hitting tip and a wave transmitter for checking the traveling direction, a transmitter (11) has a lid (16) in a front hole (16) of the hitting tip (5). 19) A ram drilling machine, which is closed by 19) and is installed in a built-in position accessible from the front. 2. The ram drilling machine according to claim 1, wherein the battery (12) is mounted in the front hole (16). 3. The ram drilling machine according to claim 1, wherein a battery box (14) is arranged in the front hole (16). 4. The transmitter according to claim 1, wherein the journal of the transmitter is fitted in the battery box.
A ram punch according to any one of claims 1 to 3. 5. A battery box (14) and a transmitter (11) comprising a spring (18) supported by a blind end (17) of a front hole (16) and a spring (20) supported by a lid (19). The ram drilling machine according to any one of claims 1 to 4, wherein the ram drilling machine is fixed between the ram punches. 6. The front wall (23) of the front hole (16) is provided with an outwardly open groove.
A ram punch according to any of the preceding claims. 7. The journal (25) has a cover (19) with a front hole (1).
It is fitted into 6) and is locked by a clamping pin (21), which is inserted into the radial hole (22; 24) of the cutter wall (23) and the journal (25). A ram punch according to any one of claims 1 to 6. 8. The ram drilling machine according to claim 1, wherein the groove at the impact tip is closed with a mixture of a plastic metal powder or a ceramic powder that transmits electromagnetic waves.