FI72036C - SOTNINGSBORSTE. - Google Patents

Description

72036

SWEEPING BRUSH

The invention relates to a sweeping brush. Such a sweeping brush is used in particular for cleaning smoke, air conditioning and other similar flues or pipes.

The known sweeping brushes are made in such a way that bristles or cords of a certain size are attached approximately at their center to each other or to the brush body either in a point 10 or in a line. The attachment point of the cords is then located approximately in the center of the brush, from which the cords extend radially outwards.

The brush structure shown above is quite dense, so that a pressure difference is created in the flue during different work on different sides of the brush.

This in turn makes it difficult to move the brush. In addition, the soot and dirt do not pass very easily through the brush, but remain floating above the brush or stick to the brush itself, causing the same dirt to move back and forth in the flue 20. Due to the method of attachment, the cords are quite long, which is why a lot of cords are consumed. In addition, due to its length, the wire must be thick to provide sufficient rigidity. In addition, when the attachment point of the horsehair is located at almost one point or in a straight line, it is difficult to obtain the horsehair 25 sufficiently tightly. The structure is thus technically problematic.

The object of the invention is e.g. eliminating the disadvantages described above and providing a soot brush that is practical at work and simple and inexpensive to manufacture. This is achieved by the features of the invention set out in the appended claims.

The sweeping brush according to the invention is suitable for use in cleaning various types of flues, pipes and tubular bodies, such as 72036 bottles. Thanks to the opening in the middle of the brush, equal pressure is applied to the flue in different parts of the brush during work. This simplifies the work and reduces the movement of dirt on the brush. At the same time, the dirt 5 can pass down the opening in a vertical position or in a sloping flue. Cleaning can be further enhanced, e.g. in horizontal flues, by arranging a separate suction device in connection with the opening, which at the same time collects soot, dust, scum and the like removed from the flue by the brush.

If necessary, the brush according to the invention can be made very perpendicular to the horse, i.e. very low in the direction of the brush. The brush can consist, for example, of only one ring 15 and the cords attached to it. In this case, the brush can be easily moved even in tight spaces, such as bends in air conditioning ducts.

Because the attachment points of the ropes are located annularly, it is possible to get the ropes very tight if necessary. In addition, they can be made short, so that it is also easy to obtain sufficient rigidity because the torque acting on the cord and its attachment point is small. The properties of the brush can thus also be adjusted by changing the diameter of the tubular body 25 and the length of the horseshoes. It is clear that the brush according to the invention is particularly advantageous in construction, especially when the cleaning takes place by means of a rotational movement. It is also easy to connect a rotating device to the brush with a suitable shaft.

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On the other hand, the manufacture of the device is simple due to its structure and can be mechanized or automated.

In the following, the invention will be explained in detail with the aid of the accompanying drawings, in which

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72036

Fig. 1 shows a side view of an embodiment of a sweeping brush according to the invention (section A-A in Fig. 2), and

Figure 2 shows a corresponding sweeping brush in the direction of the tube 5, i.e. seen from the end.

Figure 3 shows a detail of another embodiment of a soot brush.

The sweeping brush according to the invention in Figures 1 and 2 comprises a body 1, preferably made of a metal such as steel. The body 1 is annular or tubular, with an opening 1a in its central part in the longitudinal direction B-R of the brush. The groove is arranged on the outer surface of the body 1, for example, by milling a trapezoidally shaped groove with the most advantageous profile. 13 This groove is arranged to rotate the body 1 helically. A tensioning wire 3 is placed in the groove, which is most preferably made of steel and has a circular or polygonal cross-section. By means of the tensioning wire 3, the cords 4 are fastened by pressing at suitable intervals approximately perpendicular to the body 20 1. If desired, the cords can be wound, for example, once around the tensioning wire 3, whereby the cords are locked in place. The tensioning wire 3 is attached, for example, by welding at both ends to the body 1.

At the other end of the body 1 there is a holder 5a to which the first drive or pull cord 6a of the sweeping brush can be attached. Correspondingly, the opposite end of the body 1 has a holder 5b to which a second drive cord 6b or a corresponding cord, e.g. for counterweight, can be attached. The holders can be fixed to the body 1 or detachable and replaceable.

The sweeping brush according to the invention is used in the usual way. The brush is lowered into the flue 4 72036 by means of a counterweight attached to the second rope 6b, e.g. A separate suction device can advantageously be connected to the sweeping brush according to the invention. In this case, the opening 1a is connected e.g.

5 with a flexible pipe 8 to the suction 1 ai11 9, which is outside the flue or duct to be cleaned when the brush is used.

Figure 3 shows a detail of the body from another embodiment of a sweeping brush. The brush body 1 is annular or tubular as in Figures 1 and 2. The body 1 is most preferably provided with a flange Ib at at least one end. A support wire 7 is placed next to the tensioning wire 3. This is most preferably a steel wire as well as a tensioning wire-15. By means of the tensioning wire 3, the wires 4 are in a way fastened between the support wires 7 radially around the body. The support wires 7 and the body 1 then form a groove 2 according to the embodiment in Figs. 1 and 2. When the diameter of the tightening flange is d 1 and the diameter of the support wire df is preferred, their ratios remain within the limits of 0.5 d 2. By changing the ratio of the diameters, the opening angle of the horseshoes 4 is affected in the longitudinal direction B-B of the body, i.e. in the direction of the brush.

The invention has been described above mainly with reference to two preferred embodiments thereof. It is clear that the invention can be modified in many ways within the scope of the inventive ideas set out in the appended claims. Thus, for example, the grooves 2 in Fig. 1 may be annular closed grooves spaced apart in the longitudinal direction B-B of the body 1. Their cross-section may be curved in shape such as a semicircle or polygonal. The support wire 7 in Fig. 3 may have an angular cross-section as well as a tension wire 3. The springs 4 are preferably 35 steel wires, such as steel, but they can also be made of plastic, natural fiber or the like.

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