VERFAHREN ZUR HERSTELLUNG EINES SCHLAUCHANSCHLUSSES MIT DRUCKMESSPUNKT FÜR EINEN DRUCKSENSOR

A process for producing a hose connection with a pressure measuring point for a pressure sensor

The invention relates to a method for producing a hose connection with a pressure measuring point for a pressure sensor by a closed wall. With the aid of an electric drive and a fan, a volume flow, the dust-laden air is produced at industrial extractor transported. With the help of one or more filter elements, the air is then ge ^¬ purified.

For optimum operating status to be granted slightest ^¬ th, the current flow must be measured. As a practical and almost independent of the choice of the drive has proven measuring system, the pressure measuring point with measuring nipple. However, the position of the measuring nipple is predetermined on the basis of the mounting holes in commercially available solutions and subsequently can only be changed at considerable additional expense, for example by drilling of new mounting holes or by reaction of the nipple itself. Additionally, a new thread must still optionally be cut. It is important to position as may turbulence in the In ^¬ blowing area of the fan can affect the measurement accuracy. The production of defined hose connections for

Pressure sensors is associated with many time-consuming steps and several parts. From DE 10 2013 001 124 B3 a hose connection arrangement is known, in which in cooperation with a blind rivet, an additional order to be connected to the blind rivet nut is proposed which is available for connection to a hose, an additionally molded hose connection.

The object of the invention is to provide a simplified and efficient procedure for the preparation of a hose connection with a pressure measuring point for a pressure sensor.

This object is achieved by a method for producing a hose connection for a pressure sensor according to the features of claim 1. According to the invention the following steps are pre ^¬ see:

- manufacturing a bore through the wall to the diameter of Nietfortsatzes a blind rivet with the mandrel,

- By plugging the blind rivet through the hole up to the stop of the rivet head on the wall and attaching a hose with an inner diameter corresponding to the outer diameter of the Nietfortsatzes, the Nietfortsatz of the blind rivet on the opposite side of the wall,

- Pull the mandrel of the blind rivet.

Thus the pressure measuring point newly set offers a new buildin ^¬ actuation hole and measuring nipple. At the same time the attachment for the measurement hose is provided easily and with sufficient long-term stability in industrial applications. A particular advantage is that existing tools will be used and no new construction or purchases are necessary.

A refinement of the method provides that, after the drawing of the mandrel is followed by a piercing of the end part of the mandrel of the blind rivet in the direction of the mounted tube ER. This process step is advantageous in versions of blind rivets in which a pintail remains are following suit.

Further advantageous embodiments result from the further dependent claims or the possible sub-combinations.

The invention based on the drawings will be further explained. Specifically, the schematic diagram shows:

Fig. 1 is a schematic illustration of a hose connection made according to the inventions to the invention method,

Fig. 2 is a view on the head of the blind rivet in the ^air-¬ throughflow area of the inlet nozzle,

FIGS. 3 to 8, the individual process steps, and Fig. 9 is a schematic illustration of a hose connection made by the inventive method with pressure measurement point during operation.

The same in the figures, reference numerals designate like or equivalent elements.

In Fig. 1 is a schematic illustration of a hose connector 1 produced by the inventive method in the wall 3 of the inlet nozzle is shown. Fig. 2 shows schematically the top view of the rivet head 8. The arrangement makes the pressure measuring point. The by drawing of the mandrel of the blind rivet thickened Be ^¬ area of the Nietfortsatzes 5 clamps the previously plugged portion of the tube 9 securely and firmly.

The rivet head 8 of the blind rivet is in luftdurch- flocked area of ​​the inlet nozzle. The air duct 12 through the blind head forming a connection towards the hose 9. At these can be connected to the pressure sensor (not shown). FIGS. 3 to 8 show the method according to the invention in individual steps.

Fig. 3 shows the for the sensor / hose connection to 3. ^¬ by pressing wall in Fig. 4 by the arrow making a hole 4 through the wall 3 to the diameter of a blind rivet 6 Nietfortsatzes 5 with pin 7 illustrates. Fig. 5 shows the through insertion of the blind rivet 6 through the hole 4 to the stop - see also Fig. 6 - the Nietkop ^¬ fes 8 on the wall 3 and plugging of a tube 9 with egg ^¬ nem inner diameter of the outer diameter of the Nietfortsatzes 5 corresponds on the Nietfortsatz 5 of the blind rivet 6 on the opposite side of the wall. 3

Fig. 7 pulling the mandrel 7 of the blind rivet 6 shows in

Arrow under demolition of the terminal part 10 of the mandrel 7. The drawing can be done with a normal riveting tool. In this case, an extension of the Nietfortsatzes 5 in the region of the mounted tube is effected 9. The closure part 10 of the

The blind rivet can be left to the next ^¬ widened portion of the rivet optionally after demolition of the mandrel 7 and has to be removed subsequently in this.

Finally only, the piercing of the end part 10 of the mandrel 7 of the blind rivet is done, as shown in Fig. 8 6 9 in the direction of the mounted tube this purpose can also be torn off mandrel 7 may be used together with light hammer blows as the above using the rivet gun.

After removal of the end part 10 from the hose 9, the tube connection is made through the wall 3 of the inlet nozzle for a pressure sensor ready. Once the work of aerodynamically highly trained rivet head 8 in the aerated area stops. The reasonable brought tube 9 stops without adhesives or additional Fixed To ^¬ supply measures.

Fig. 9 shows the hose connector 1 with the rivet head 8 in the running operation for measuring a flow of air 11 through the air passage 12 and the tube 9.

LIST OF REFERENCE NUMBERS

hose connection

Pressure measurement point

wall

hole

Nietfortsatz

Rivet

mandrel

rivet head

tube

final part

airflow

air duct