DE202007004605U1 - Venturi suction nozzle for start-up or shutdown e.g. local-supply line, has pipe provided with thread at opening to mount air coupler e.g. compressor connection, where pipe has testing and measuring connection with stopper - Google Patents

Abstract

The nozzle has a pipe (26) of 200 millimeters long, where a pipe bend (30) with a preset length is welded centrally in the pipe. The pipe is provided with a thread at an opening (32) to mount an air coupler e.g. compressor connection. Air flows via the compressor connection and a brass nozzle (29) when the nozzle is in operation. The pipe has a testing and measuring connection (27) with a stopper.

Description

Application:

• For Vacuum natural gas pipelines gas-free, for commissioning or decommissioning from local utilities, Channel and surface pipe systems gas-free suck

It's on:

High pressure lines (Overhead lines, transmission lines) where new connections or line changes are made need (welding work) are to be depressurized, and then make gas-free. This can only by means of a compressor on a section of the road (distance slide) with blower) connected will happen. Here then air is in the decommissioning blown increasing lead. At the other end of the line then has to the gas freedom can be measured. This is very time consuming and in the line section can still be gas bubbles present (deflagration during welding).

New laid local supply lines must be filled with gas, all pipe ends should be vented be, this gas-air mixture is by means of plastic pipes over Erdgleiche blown out. (Static charge) This is not the newest Regulations of DVGW.

Out of order increasing gas lines (old lines) are purged with nitrogen. Very costly, Working hours and costs for Nitrogen.

slop and surfaces Suction pipes gas-free.

This only has the fire brigade a special ex protected blower, but have no possibilities To suck pipes free of gas.

DVGW statement

Loud DVGW worksheet G 465/2 Commissioning of gas lines must be the when blowing or rinsing Gas or gas / air mixture escaping from gas pipes safely via exhaust pipes into the atmosphere dissipated become.

The Blow-out pipe should be metallic, sufficiently grounded 2.5 m above ground level open up vertically and a test and have measuring ports.

description 1

Venturi suction nozzle

Characterized in that the suction venturi is made of steel or V2A, with an outside diameter from 114.3 mm, on the suction side ( 33 ) is the pipe ( 26 ) 200 mm long and a wall thickness of 4.5 mm. In the middle of the pipe is a 3/8 "elbow ( 30 ) welded with a length of 19 cm and 45 ° bent. At the beginning ( 32 ), the pipe is threaded around here an air coupling (compressor port) ( 32 ) to mount.

Here, when the Venturi is in operation, approx. 6 bar air flows in via the compressor connection, and then flows to the brass nozzle (nozzle size 6 mm) ( 29 ) Here, the air flow through the constriction produces 114.3 mm to 63 mm, a negative pressure of 81 mbar, and so sucks a volume of air of 300 m ³ . The pipe ( 26 ) has on the opposite side a test and test piece size ½ "( 27 ) with a stopper ½ "( 28 ) so that the sleeve can be closed after the measurement. To the 1

(Venturi) to perform the assembly is a handle ( 25 ) welded. So that the pipe systems can be firmly connected to each other when blowing out or sucking, all pipe ends on the sleeve side have a counter hook ( 7 ) and on the spiky hook ( 6 ) These are adjustable in length, so that a contact pressure can be generated and thus creates a firm connection.

2

A blowpipe / suction tube ( 1 ) DN 110 mm length 1 m. This tube has three feet ( 9 ) by means of handwheels ( 13 ) are adjustable in height so that you can align the pipe system and bring in lot. The feet are covered with a grounding tip ( 10 ), if a static charge of the pipe systems should take place, they are derived here. All three feet are attached to an adjustable clamp ( 12 ) d 110 mm screwed in height and secured with self-locking nuts. In the direction of flow down sleeve side here are two hooks ( 7 ) assembled. on the exit side spiked two locking hooks ( 6 ).

3

A pipe bend connection for pipe size 110 mm consisting of ( 1 ) and ( 2 ) and ( 3 ) This fitting is used to make a connection to the newly installed gas pipe or to the old gas pipe.

A rubber boot ( 3 ) DN 110/110 mm, the connection can be made as a clamp Closure on the cuff is a V2A clamp ( 4 ) provided with a closing hook and a hook. The four-part segmental arch ( 2 ) is rotatable in the individual segments 0 ° -90 °

Above the segmental arch is still a V2A tube ( 1 ) Length 0.25 m. On the spigot are two locking hooks ( 6 ) available, here we 2 assembled.

4

A pipe bend connection for pipe size 160 mm consisting of ( 1 ) and ( 2 ) and ( 3 ) This fitting is used to make a connection to the newly installed gas pipe or to the old gas pipe.

A rubber boot ( 3 ) DN 110/160 mm, the connection can be made, as a clamp on the cuff serves a V2A clamp ( 4 ) provided with a closing hook and a hook. The four-part segmental arch ( 2 ) is rotatable in the individual segments 0 ° -90 °

Above the segmental arch is still a V2A tube ( 1 ) Length 0.25 m. On the spigot are two locking hooks ( 6 ) available, here we 2 assembled

5

A pipe bend connection for pipe size 225 mm consisting of ( 1 ) and ( 2 ) and ( 3 ) This fitting is used to make a connection to the newly installed gas pipe or to the old gas pipe.

A rubber boot ( 3 ) DN 110/225 mm, the connection can be made, as a clamp on the cuff serves a V2A clamp ( 4 ) provided with a closing hook and a hook. The four-part segmental arch ( 2 ) is rotatable in the individual segments 0 ° -90 °

6

A discharge pipe / suction pipe ( 1 ) DN 110 mm length 1 m. This pipe will be in working condition (2) assembled.

The pipe has a test connection ( 8th ) This is made so that when measurements are made and the probe is inserted into the tube, no gas can escape. The test connection ( 8th ) consisting of a V2A ring with a diameter inside 20 mm and outside 25 mm, between the pipe wall and V2A ring is a rubber sealing disc with a Phillips built-in. In the direction of flow down sleeve side here are two hooks ( 7 ) assembled. on the exit side spiked two locking hooks ( 6 ).

7

A discharge pipe / suction pipe ( 1 ) DN 110 mm length 1 m. This pipe is only used to ensure that the escape of the gases 2.5 m above ground level is maintained. In the direction of flow down sleeve side are two hooks ( 7 ) assembled. on the exit side spiked two locking hooks ( 6 ).

8th

The fitting is required to suck dirty water and surface piping gas free. A rubber boot ( 16 ) in size 1.2 m × 1.1 m. In the middle of the rubber surface, a connection piece DN 110. At this connection can 2 be connected. The stub ( 1 ) on the exit side as a spigot with two locking hooks ( 6 ), on the input side is an 8 hole flange ( 18 ) welded. To attach the rubber mat is a counter flange ( 17 ) with 8 V2A screws ( 20 ) screwed.

9

An assembly aid for 8th Consisting of three pieces of round iron ( 16 ) which are bent at the end to 90 °, at the other end is a flat iron ( 15 ) welded with an 8 mm hole. These three are screwed together and let view as a spider on the shafts and manhole cover lay. Thus, this is guaranteed 8th . 2 . 6 , and 7 when the manhole covers are removed, they can be mounted.

10

One Weld DN 110 for Ausblasleitungen. There are high pressure blowers with different flange sizes welded to the exhaust pipe are. The welding socket is welded at the pipe end, this is guaranteed the Venturi suction nozzle can be connected to the exhaust pipe.

Claims (1)

Venturi suction nozzle characterized in that the suction venturi is made of steel or V2A, with an outside diameter from 114.3 mm, on the suction side ( 33 ) is the pipe ( 26 ) 200 mm long and a wall thickness of 4.5 mm. In the middle of the pipe is a 3/8 "elbow ( 30 ) welded with a length of 19 cm and 45 ° bent. At the beginning ( 32 ) the pipe is threaded around here an air coupling compressor port) ( 32 ) to mount. Here, when the Venturi is in operation, approx. 6 bar air flows in via the compressor connection, and then flows to the brass nozzle (nozzle size 6 mm) ( 29 ) Here, the air flow through the constriction produces 114.3 mm to 63 mm, a negative pressure of 81 mbar, and so sucks a volume of air of 300 m ³ . The pipe ( 26 ) has on the opposite side a test and test piece size ½ "( 27 ) with a stopper ½ "( 28 ) so that the sleeve can be closed after the measurement. To the 1 (Venturi) to perform the assembly is a handle ( 25 ) welded. So that the pipe systems can be firmly connected to each other when blowing out or sucking, all pipe ends on the sleeve side have a counter hook ( 7 ) and on the spiky hook ( 6 ) These are adjustable in length, so that a contact pressure can be generated and thus creates a firm connection.