DE3429170A1 - Cutter bar for a part-face machine with two cutter heads rotatable about an essentially horizontal axis - Google Patents

Abstract

The invention relates to a cutter arm (1) for a part-face machine with two cutter heads (3,4) which are rotatable about an essentially horizontal axis (5) and whose direction of rotation (S) is preferably selected such that its bits (6) arranged in a distribution around its periphery, move from top to bottom on the face side. On the top of the cutter arm (1) a spray device (8) is provided whose nozzles (10) are arranged side-by-side in such a way that they strike some of the bits (6) in the region of their highest position and, for the remainder, spray directly onto the face in the region between the bits (6) located in their highest positions. In order to protect the spray device (8) against fouling and damage, the invention proposes to arrange the spray device at a distance (b) behind the cutter heads (3,4) on the cutter arm (1) underneath a cover plate (7) covering the cutter arm (1) (Figure 1). <IMAGE>

Description

ι 70 ^{Gw 8428} ι / u _{Me / R1}

07/12/1984

Patent application

of the company

Westfalia Ironworks Union

4 670 Lünen

Cutter arm for a roadheading machine with two cutter heads rotatable about an essentially horizontal axis

The invention relates to a cutter arm for a road hanger with two cutting heads rotatable about a dm substantially horizontal axis, the direction of rotation of which is preferably selected so that their Move chisels distributed over their circumference on the face side from top to bottom, with the top of the cutting arm a spray device is arranged, the nozzles are arranged side by side in such a way that they partially the chisel in the area of their meet the highest position and on the other hand between the chisels located in the area of their highest position through directly spray on the face.

Such a device is from the European patent application 0 010 536 known. With this previously known device, it is possible with relatively little water consumption, under all cutting conditions Sufficient cooling of the chisel and the working face as well as a

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To achieve sufficient binding of the dust generated during the cutting work. However, you have the disadvantage that the spray device and in particular their nozzle carriers in the immediate vicinity - the cutting heads and the working face are arranged so that they easily soiled and damaged by loosened material.

The object of the invention is to avoid the disadvantages described above and to create a cutting arm for a roadheading machine of the type mentioned in the subject, which is characterized by a reliable and reliable spray device. This object is achieved according to the invention in that the spray device is arranged at a distance behind the cutting heads on the cutting arm below a cover plate covering the cutting arm.

According to the invention, the spray device is therefore at a safe distance arranged by the cutting roller and the face and additionally by the cover plate covering the cutting arm against falling Material protected, so that a reliable and safe operation is guaranteed.

In a preferred embodiment of the invention, there is the nozzle carrier the spray device from a tube with a preferably circular cross-section, the longitudinal axis of which is at least in the central area runs parallel to the axis of the cutter heads. In this way it is possible for the nozzle carrier to be relatively flat and thus to save space can be arranged below the cover plate of the cutting arm.

■ According to a further feature of the invention, the nozzle carrier is included the nozzles, which are distributed over its length, are mounted on the cutting arm so that they can rotate about its longitudinal axis. This is preferably done through Storage of the nozzle carrier with the aid of one or more detachably arranged clamps. In this way it is possible to change the direction of the spray of the nozzles arranged on the nozzle carrier can be optimally adjusted to the cutting horizon of the cutting heads used, so that the Spray device also with z. B. changing rock properties always * works as effectively as possible.

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According to a further advantageous feature of the invention, the two end regions of the nozzle carrier are angled slightly away from its central region in the direction away from the face. Because of this angled shape, it is possible, especially when cutting horizontally, to moisten a specific face area in advance, immediately before the cutting. It has proven to be particularly advantageous if the two end areas of the nozzle carrier are in the same direction by about 10-40, ^
Central area are angled.

in the same direction by about 10-40 °, preferably about 25 °, compared to the

In a preferred embodiment of the invention, the nozzles distributed over the length of the nozzle carrier are in two groups divided, each of these groups assigned to a cutter head and independently of one another with spray liquid in a manner known per se can be acted upon. In this way it is always possible only to spray the cutting head which is currently engaged, so that the spray liquid consumption is almost halved with the known Advantages.

It is also possible within the scope of the invention that those nozzles which hit the chisels in the area of their highest position, in a manner known per se, regardless of those nozzles that directly hit spray the face, can be acted upon. That way lets save more spray liquid, because, especially with the vertical Cutting, depending on the cutting direction (up or down), always the nozzle group that can be acted upon achieves the optimum effect for the corresponding operating mode.

In the following, the invention will be based on an exemplary embodiment are explained in more detail.

Show it:

Fig. 1 is a side view of an inventive Cutter arm for a roadheading machine with two rotatable around an essentially horizontal axis Cutting heads and a spray device according to the invention;

Fig. 2 is a plan view of the cutting arm according to the invention according to Figure 1;

Fig. 3 is a plan view of a according to the invention as Tube shaped nozzle carrier.

Figures 1 and 2 show a cutting arm 1, at its front End 2 two cutter heads 3; 4 are mounted, which are rotatable about a substantially horizontal axis 5. The direction of rotation (arrow S in Fig. 1) the cutter heads 3; 4 is chosen so that its arranged distributed over its circumference - only hinted at in the drawing - Move chisel 6 on the face side (on the left in the drawing) from top to bottom.

A cover plate 7 is arranged at a distance a above the cutting arm 1, which is connected to the cutting arm 1 via fastening means (not shown in detail). Below this cover plate 7 is The spray device 8 is arranged on the cutting arm 1. How in particular As can be seen from Figure 3, the spray device 8 has a nozzle carrier 9, which consists of a circular tube, which is provided with the nozzles 10 distributed over its length. The nozzle carrier 9 is arranged such that its longitudinal axis in

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its central area 11 parallel to the axis 5 of the two cutter heads 4; 5 runs. The two end regions 12; 13 of the nozzle carrier 9 are opposite its central region 11 by the angle CC, which is about 25 °, angled backwards with respect to the face. The nozzle carrier is with the help of two clamps 14 on the cutting arm 1 set, the fixed halves 15 are connected to the cutting arm 1, while their removable halves 15 'with the help of two Screws 16 together with the nozzle carrier 9 on the clamp halves be determined.

The pipe ends are closed by plugs 17; the nozzles 10 as Formed screw nozzles. The nozzle shape and the liquid pressure are chosen so that a relatively focused jet up to the working face is guaranteed.

The nozzle carrier 9 is provided with two hydraulic fluid connections 17, since the nozzle carrier 9 is optionally either designed in such a way that all spray nozzles 10 are acted upon at the same time, or such that all of the nozzles are divided into two groups A; B, which can be applied separately. In the latter Case is the nozzle carrier 9, for. B. by inserting a partition in the region of its axis of symmetry 18, divided into two liquid spaces.

List of reference symbols

1 cutting arm

2 end of the cutting arm, in front

3 cutter head, left

4 cutter head, right

5 axis

6 chisels

7 cover plate

8 spray device

9 nozzle holder

10 nozzles

11 middle area

12 outer area, right

13 outer area, left

14 clamp half, fixed

15 clamp half, loose

16 screw

17 Hydraulic fluid connections

18 axis of symmetry

19 clamps

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Claims (8)

"'Gw 8428 07/12/1984 patent claims 1. Cutter arm for a partial hawker with two cutter heads rotatable about a substantially horizontal axis, the direction of rotation of which is preferably selected so that their chisels distributed over their circumference move from top to bottom on the face side, with a spray device on the top of the cutter arm is arranged, whose nozzles are arranged next to each other in such a way that they partially hit the chisels in the area of their highest position and, on the other hand, spray directly onto the face between the chisels located in the area of their highest position, characterized in that the spray device "( 8) 'is arranged at a distance (b) behind the cutting heads (3; 4) on the cutting arm (1) below a cover plate (7) covering the cutting arm (1). 2. Cutter arm according to claim 1, characterized in that the nozzle carrier (9) of the spray device (8) consists of a tube with a preferably round cross-section, the longitudinal axis of which at least in the central region (11) parallel to the axis (5) of the cutter heads (3; 4) runs. 3. Schrämarm according to claim 1 and / or 2, characterized in that the nozzle carrier (9) together with the distributed over its length arranged nozzles (10) is rotatably mounted about its longitudinal axis on the Schrämarm (1). 4. Schrämarm according to claim 3, characterized in that the nozzle carrier (9) with the help of one or more, releasably arranged clamps (14) is mounted on the Schrämarm (1). -2-1 EPO COPY 5. Cutter arm according to one or more of claims 1-4, characterized in that the two end regions (12; 13) of the nozzle carrier (9) are angled slightly away from its central region (11) in the direction of the face. 6. Cutter arm according to claim 5, d adu rch characterized in that the two end regions (12; 13) of the nozzle carrier (9) are angled in the same direction by about 10-40 °, preferably about 25 °, relative to the central region (11). 7. Cutter arm according to one or more of claims 1-6, characterized in that the nozzles (10) arranged distributed over the length of the nozzle carrier (9) are divided into two groups (A; B), each of these groups having a cutter head (3; 4) assigned and can be acted upon in a manner known per se with spray liquid independently of one another. 8. Cutter arm according to one or more of claims 1-7, characterized in that those nozzles (10) which hit the chisels (6) in the region of their highest position, in a manner known per se, independently of those nozzles (10), ' which spray directly onto the face can be acted upon. EPO υυΡΥ al