DD285638A5 - DEVICE FOR PRESSURE MEASUREMENT IN PIPES AND LONG-SLIDED PANELS - Google Patents

Abstract

The invention relates to a device for measuring pressure in pipes and elongated containers. Fields of application of the invention are newly laid and renovated pipelines and containers with gas and water-like media in the subterranean or above-ground area with an operating pressure of less than 0.1 MPa. The object, to develop a reusable device, which eliminates the perceived as detrimental and disturbing physically heavy work at the Rohrendverschluessen, is tem- porary achieved by daz in a cylindrical gum bubble consisting of pressure bubble and protective cover, in addition a filling / Meszvorrichtung, separated for Test section and bladder, consisting of a hose connection piece with pressure gauge connection and a textile-reinforced pressure hose, is attached. The tester ends are each provided with a safety washer. Pipeline; Container; Operating pressure; Rubber bladder; Meszvorrichtung; Manometer; Schlauchanschluszstutzen}

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a device for measuring pressure in newly laid and renovated pipelines and containers with gaseous and aqueous media in the subterranean or above-ground area with an operating pressure of less than 0.1 MPa.

Characteristic of the known state of the art The skilled person is aware of the relevant sources of information the use of metal pipe end caps with FuII

and pressure gauges, which are attached to the ends of the test section of a mounted pipeline or an elongate container known.

Furthermore, pipe test plugs of DN 90 to 120mm are known, consisting of several metal disks with inlaid

consist of wedge-shaped rubber rings. When compressing the metal discs, the rubber rings to the

Pressed red gutter wall and thus achieved the seal of the test string. About a lockable filling line through this Plug through the test section can be filled with the Prü'medium, and to be connected measuring equipment

the internal pressure in the test section is measured.

Also known are devices for testing and shutting off pipes which consist of several metal parts, wherein a

Conical iron part achieved by displacement the pressing of a rolling rubber ring and thus the sealing of the pipe end.

With all mentioned known technical solutions such disadvantages are associated such. B. significant physical Effort, especially for large diameters, no safe sealing due to the small sealing surface of a rolling ring

as well as no reliable control of the absolute tightness of the device in a pressure test, as by the construction itself a check with foam-forming agents on the roll ring sitting in the pipe is not feasible.

Literature sources used to determine the state of the art:

- TGL 190-802, TGL 190-408, TGL 16-370, TGL 190-355

- Gas supply technology Altmann, Engshuber, Kowaczeck VEB publishing house for basic industry

- Manual for Pipeline Construction Sotien, Mertsching, Nötzold

VEB publishing house technology Berlin

DD-PS 90477, DE-OS 3414620, DE-PS 3014013, DE-PS 2556138, DE-OS 3401955, DE-OS 2757851, DE-PS 2607649, DE-GM 8500323

Object of the invention

The aim of the invention is to eliminate the perceived in the pressure measurement as detrimental and disturbing physically heavy work on the pipe end closures and thus u. a. to save a working time.

Explanation of the essence of the invention The invention has the object zugru ide to find a reusable device, with the dargelegton deficiencies of

known technical solutions in the pressure measurement in pipelines and containers eliminated or largely be turned off.

According to the invention, the problem is solved by attaching to a rubber-like rubber bladder, which in a textile-proven

gummed Schutthülle inserted and inflated with the 4iachen pressure of the Prüfstranges, in addition a filling / measuring device is attached.

This consists of a hose connection piece with pressure gauge connection, which points to the outward facing blister side

is attached, passes through the bladder skin and the connecting element is a textile-reinforced

Pressure hose that reaches to the end of the bladder inserted in the test section. There, the pressure hose opens into a sealing piece penetrating the bladder skin, which at the same time forms the outlet opening

represents the test medium and the inlet opening for the pressure measurement.

To increase the safety against unintentional wandering of the device during the filling of the test section is

According to the invention at the Prüfstrancjenden ever a lock washer, consisting of sheet steel, which a corresponding

Tension with the tube inside has to use. embodiment

The device for Druckmessunij in pipelines or elongated containers will be explained using the example of the leak test of a remediated Niederdruckgaslei development.

Fig. 1: represents the different shut-off devices used 3 (Figure 2) and 8 (Figure 3) in the test section 1. Fig. 2: shows the shut-off device as a rubber bubble with textile protection and support skin containing the fill and drain valve 5. Fig. 3: shows the shut-off device, which contains the following additional device with respect to the device shown in Figure 2. In the center of the longitudinal axis of the rubber bubble with textile protection and support skin are the openings 9 and 14th

sealed.

These breakthroughs have the task of receiving the filling and measuring tube 13 between the bladder ends. These Breakthroughs consist of F \ohrstücken whose pointing into the bladder part is worked out as a hose nozzle, and from ever

a double screw for sealing between the tube and rubber skin.

The opening 9 still contains the branch pipe and the pressure measuring device 10, the Hauptabsperrventil 11, and

the filler neck for the test medium 12th

 4 shows the safety shives 6, which consists of a metal disc with attached 3 expansion screws 15. About these

Spreader screws will de locking washer, which has the task to prevent the wandering of the device with the Clamped inside surface of the tube. The for the purpose of rehabilitation from the supply network seperated pipe section 1 is after the renovation of a To undergo a leak test. As preparatory work are at the ends of the test string on the length of the device, the pipe inner wall with

known means to clean so that no crusts or corrosion residues adhere.

Subsequently, before the A set of the device 3 and 8, an approximately 0.2-0.3 m wide ring of nonporous filler 4

to apply to the pipe inner wall in de / middle of the seat of the devices.

Thereafter, the devices 3 and 8 are inserted into the respective cleaned Prüfstrangende 2 and the bubble filling valve fifth

with 4 times the prescribed tightness test pressure to fill (see Figure 1).

To secure against the wandering of the device, the lock washer 6 is inserted and by means of the expansion screws 15th

to tense.

Thus, the ends of the test string 1 are prepared for the leak test. After filling the device 8 with the same pressure as device 3, it is possible via the connection for pressure measurement 10 /

11/12 and the filling and Mefischlauch 13 of the pipe section 1 of 7 are filled with the test medium.

To control the density of the devices 3 and 8, at the interface, tube inner wall / device will be on each Bubble outside a Schaimbildendes agent applied. Once the seal seat has been verified, the leak test can be carried out using the conventional method

become. After completion. the leak test, the relaxation of the test section 1, the removal of

Lock washers 6, the relaxation of the device 3 and 8 and the removal of the filler 4.

Claims (2)

1. A device for pressure measurement in pipelines and elongated containers ^ estehendaus from a bladder (3) and (8), which also serves as a sealing element, characterized in that in the bladder (8) aligned on the entire length of Blasenkörpors flexible pressure hose (13 ), for connecting a filling / measuring device (10) and i11) for the test section (1), wherein the flexible pressure hose (13) can not be deformed by the Blasemnnendruck and on the outside of the bladder body (3) and (8) with one Locking washer (6) is attached. 2. Apparatus according to claim 1, characterized in that in the center of the bladder body outer wall, a sealing porous mass for closing the smallest pores is applied to the tube-container inner surface.