FI74132C - Ironing device for pipes at ventilation ducts - Google Patents

Description

741 32

K'.IF 1STINLAITE FOR VENTILATION PIPING PIPES - STRYP-ANORDNING FOR RÖR VID VENTILATIONSKANALER

The present invention relates to a choke device for a pipe of a ventilation piping, the pipe jacket of which is provided with holes which can be closed as required to provide a choke.

In known choke devices, the holes in the pipe jacket are closed in order to provide a choke, for example by directly covering them with a second pull-on pipe as required. When the throttle device is usually located in a chamber, this must first be opened, after which the throttle adjustment can only be performed. This is cumbersome and time consuming.

The object of the present invention is to eliminate the above drawbacks. The choke device according to the invention is characterized in that the part of the tube in which the holes are located consists of several successive ring parts of the tube which partially overlap so that the holes in the successive ring parts are known to be adjacent in the open position By means of the invention, the adjustment of the throttle can be performed by rotating the throttle device from its end, for example by means of a small electric motor. The electric motor can receive an impulse, for example, from a thermostat located in the room, which, by means of techniques known per se, produces impulses for the electric motor.

A preferred embodiment of the invention is characterized in that the ring part consists of two ring rings of different sizes attached to each other, each of which has circumferential rows of holes. Ring parts of this type are preferably made of, for example, plastic, metal or even ceramic and can be easily installed in the required number in succession.

2,741 32

Another embodiment of the invention is characterized in that the ring parts are provided with a stop member, such as a pin or screw, which at the opposite side of the opposite ring part, such as a notch, allows a small defined rotational movement between the open position and the closed position. Thus, the ring parts rotate relative to each other only between the closed and open positions, whereby the entire choke device is infinitely adjustable between the open position and the closed position. If the stop member is a screw, some of the rings can be locked together either in the desired open position or in the closed position, whereby they cannot rotate relative to each other.

The invention will now be described by way of example with reference to the accompanying drawing, in which

Figure 1 shows a side view of the choke device with one ring part and the end cap removed from the choke device.

Figure 2 shows a section taken along the line II-II in Figure 1.

Figure 3 shows the same as Figure 2, but in a different or closed position.

The part of the pipe of the choke device in which the holes 1 are located consists of several successive ring parts 2 of the pipe, which partially overlap so that the holes 1 in the ring part 2 are aligned in the open position (Fig. 2) and closed in the closed position (Fig. 3). The ring part 2 consists of two ring rings of different sizes attached to each other, each of which has circumferential rows of holes 1. The ring parts 2 are provided with a stop member, such as a pin 3, which in the notch 4 of the opposite ring part allows a small predetermined rotation between the open position and the closed position. The end of the choke device 1 is closed by a cover 5, to which a motor adjusting the choke device can also be connected in order to effect rotational movements. The choke device 3 741 32 is mainly intended for a chamber or housing which can act as a pressure relief chamber or a distribution box.

It will be apparent to those skilled in the art that the invention is not limited to the example set forth above but may vary within the scope of the claims set forth below.

Claims (3)

4,741 32 A choke device for a ventilation duct pipe, the pipe jacket of which is provided with holes which can be closed as necessary to provide a choke, characterized in that the part of the pipe where the holes (1) are located consists of several successive pipe ring parts (2) on top of each other so that the holes (1) in the successive ring parts (2) are aligned as is known per se in the open position and next to each other in the closed position, closing the holes. Choke device according to Claim 1, characterized in that the ring part (2) consists of two ring rings of different sizes fastened to one another, each of which has circumferential rows of holes (1). Choke device according to Claim 1 or 2, characterized in that the ring parts (2) are provided with a limiting element, such as a pin or screw (3), which allows a small defined rotational movement between the open position and the closed position. .