DE202005013904U1 - Pipe and sensor combination comprises pipe with flattened upper section, in which there is aperture with slots forming part of bayonet fitting, flange being mounted on sensor which carries male part of bayonet fitting - Google Patents

Abstract

The pipe and sensor combination comprises a pipe with a flattened upper section, in which there is an aperture with slots forming part of a bayonet fitting. A flange (9) is mounted on the sensor (15) which carries the male part (7) of the bayonet fitting, allowing it to be mounted in the pipe.

Description

The The invention relates to a tube with sensor adapter.

sensors for cables are for the measurement and monitoring the composition and / or the speed of transport of fluids in pipes important. They become the measurement of concentration used the components of a passing fluid stream, eg of gas mixtures, liquids or powders. Such sensor adapters can on the one hand in exhaust pipes, Charge air pipes and water pipes etc. of motor vehicles attached on the other hand, in pipes of domestic firing or pipes chemical Installations, exhaust pipes of all kinds, liquid lines, in which, for example. the conductivity via sensors is measured or the chemical composition by special Sensor types etc ..

The The invention will be described below with reference to an exhaust gas sensor. to which it is by no means limited. Problematic For all sensor adapters always the fluid-tight insertion of the sensor in the line and the attachment of the same at the - mostly round - pipe. However, the invention is by no means limited to round tubes, but let yourself apply accordingly to pipes of other cross sections.

A generic sensor connection for a round exhaust pipe is already known. This is for a sensor for an exhaust pipe of motor vehicles, welded to the pressed-out walls of the sensor opening in the pipe, a male part of a solid metal bayonet fitting and the sensor adapter made of plastic sensor attached to a female part of a metal bayonet The well-known sensor adapter has sealing means in the form of a sealing ring on the sensor outer surface, which cooperate with the pushed out walls of the sensor opening in the metal exhaust pipe. The male part of the bayonet lock and the female part of the bayonet lock are made in this known construction form of Bavarian Motor Works AG of solid metal, for example. By milling, sintering or casting, which is costly. The sensor adapter for the gas sensor with AbDichtring produced in the known device made of plastic 4 is expensive to attach in a metal bayonet part.

To this og prior art is on the 1 directed. The pipe 1 includes a round tube sensor opening 12 with wall pressed out 5 , on which the male part of a bayonet closure 7 is welded. The sensor adapters 9 is mounted in a female part of the bayonet fitting, which is in the male part of the bayonet fitting of the sensor adapter 9 engages, with the walls pushed out 5 the sensor opening 12 in the pipe 1 gas-tight.

It Object of the invention, the connection of the sensor adapter to a Pipe less expensive to design.

These Task is solved by that the tube is a flat flattened, possibly recessed section having a flat area and in the flat area an opening exists is, which in the interior of the pipe facing parts of a male part a bayonet lock includes, and the sensor head a level area having sealing ring, which flattened on the flat, possibly recessed tube section rests and seals against it; and a female part of a bayonet catch, which in the male Part of the bayonet lock engages, as well as one in the interior of the tube protruding sensor section.

It is advantageous if the tube consists of a deformable alloy, because then a complex molding process can be avoided and on known Rohrumformverfahren, such as pressing, pulling, forging u. Like. resorted to can be.

It is common preferred that the deformable alloy is a cold-formable alloy is, in particular one for a hydroforming process suitable alloy to energy expenditure by heating to avoid.

Most of time consists of the sensor adapter, which is the most diverse sensor types encase or can absorb, essentially made of heat-resistant plastic.

It but it is also possible for special To provide high temperature applications or aggressive media that the sensor adapter consists essentially of ceramic.

In In some applications, it may also make sense that the sensor adapter consists essentially of metal.

following the invention will be closer with reference to the description and the attached drawing of a preferred Embodiment, to which they are by no means limited is, clearly. It shows:

1 a sensor holder according to the prior art;

2 a longitudinal section through a sensor adapter according to the invention and

2a a cross-sectional view of the sensor adapter of 2 from underneath

3 a cross section through a tube with recessed sensor holding portion;

4 a perspective view of another embodiment of the sensor holding portion;

5 a plan view of the tube opening of 2 and 3 ;

6 a cross section through a tube with inserted sensor;

7 a longitudinal section through the tube of 6 with inserted sensor; and

8th a schematic representation of the attachment of the sensor in the tube by turning the bayonet lock.

In the 1 shown known sensor adapter has already been explained at the beginning.

2 shows a sensor adapter according to the invention 9 , The sensor adapters 9 has a sensor head 10 od the connections to the electrical system of a motor vehicle od. Like. And the ease of use is used, and a sensor section 11 on. The sensor section 11 , which can be inserted into the tube, has the male parts 7 a bayonet catch on its circumference and the probe 15 on. This is clear 2a where it can be seen from the cross-sectional view of the sensor that the male bayonet locking parts 7 concentric with the sensor 15 run. At the flat lower surface 20 of the sensor head is a sealing ring receptacle with sealing ring 2 educated.

3 shows a tube equipped for the sensor connection 1 with a flat, possibly recessed surface 6 which has a substantially round tube opening 10 has, at the periphery of the female parts of a bayonet closure 3 are formed - for example. By pressing, hydrofluoric or other suitable method.

In the production of the female part 3 the attachment is eg a pipe first 1 on a wall section 6 Flattened - for example, by a hydroforming process or by pressing, pulling or similar forming process. In this area then a substantially round opening - eg. By pressing, punching, milling od. Like. Formed. It is also possible the flattened pipe section 6 arrange by deep drawing in a tube recess - this leads to a better support of the sensor head 10 against mechanical loads. Various methods for producing such a flattening or shallow depression with openings of any shape are familiar to the person skilled in the art. Simultaneously with or later than the production of the flattening 6 are then in the peripheral region of the round tube opening by forming recesses corresponding to the female parts of a bayonet closure 3 produced. As a result of these manufacture-technically simplest steps, a complete sensor attachment of the sensor can thus be ensured; more complicated shapes are provided only in the sensor adapter, which can be made of easier-to-molding material, such as plastic or ceramic casting.

The installation of the sensor adapter 9 in the pipe 1 done by inserting the sensor section 11 into the pipe opening and twisting the sensor adapter 9 by about 90 ° (s. 8th ), wherein the flat bottom surface of the sensor head 20 on the flattening 6 of the pipe 1 plan to come to rest and the sealing ring running in it 2 seals against the surfaces in a fluid-tight manner ( 6 and 7 ).

Thereby, that now a sensor adapter is provided, the easy example. By Plastic injection molding od. Like. Can be produced and dimensioned can be used to record a wide range of sensor types, is an elaborate one Metalworking or the provision of supports or attaching metal parts no longer necessary on the sensor adapter or the pipe. The sensor adapter unit can be easily made of plastic and the pipe connection is to be formed out of the tube by the simplest forming process.

Even though the invention has been explained in more detail with reference to preferred exemplary embodiments, it is by no means limited to the same but is the expert obviously, that various designs within the scope of protection the accompanying claims possible are.

1

pipe

2

seal

3

female Part of a bayonet lock

5

walls

6

flat Area of the pipe, possibly recessed

7

male Part of a bayonet lock

9

sensor adapters

10

sensor head

11

sensor section

12

tube opening

15

probe

20

level lower surface of the sensor head

Claims (6)

Tube with sensor adapter, whereby the tube ( 1 ) a flat flattened, possibly recessed section ( 6 ) with a flat area and in the planar area an opening ( 10 ) present in the interior of the tube ( 1 ) pointing parts of a male part ( 7 ) of a bayonet connection, and the sensor head ( 20 ) a flat surface ( 8th ) with sealing ring ( 2 ), which on the flat flattened, possibly recessed pipe section ( 6 ) and seals against it; and a female part ( 3 ) of a bayonet closure, which in the male part ( 7 ) engages the bayonet closure, and a projecting into the interior of the tube sensor section ( 11 ). Tube with sensor adapter according to claim 1, characterized in that the tube ( 1 ) consists of a deformable alloy. Tube with sensor adapter according to claim 2, characterized that the deformable alloy is a cold-formable alloy, especially one for a hydroforming process suitable alloy. Tube with sensor adapter according to claim 1 or 2, characterized in that the sensor adapter ( 9 ) consists essentially of heat-resistant plastic. Tube with sensor adapter according to claim 1 or 2, characterized in that the sensor adapter ( 9 ) consists essentially of ceramic. Tube with sensor adapter according to claim 1 or 2, characterized in that the sensor adapter ( 9 ) consists essentially of metal.