DE1817053C - Inlet piece on pressurized water testing machines, in particular for pipes - Google Patents

Description

l 2

The invention relates to an inlet piece injection-molded onto a printing object. In another embodiment

Water testing machines, especially for pipes, when clogged with a complex core

to which the axial bores flowing in axially through an inlet opening, the water is inclined through the

Liquid through holes running at several points on the circumference to the inner wall of the pipe

of the inlet piece arranged outlet openings 5 pipe inner wall laterally deflected, with also

Part of the amount of water is deflected radially against the inner wall of the test specimen and axially into the test specimen

is, and in which the outlet openings in Strö- injected.

A device is also known (Ansgar

are net. Schulte, investigation of the filling process at pipe

In the continuous operation of pressurized water testing presses, dissertation from the TH Hannover 1966,

Testing machines prepares the fast and flawless p. 55 to 59, 130 to 138), in the case of the reduction

Relatively great difficulty venting. the vortex formation a streamlined closing

Short filling times require the application to be arranged in a manner that is completely surrounded by liquid.

moderately high pressures in order to achieve fast filling pre-flushing and to keep the flow losses small

to ensure gear. By that in most 15 should.

Cases axiafe injection of the liquid into the tube, the object of the invention is to overcome the disadvantages of the

spray this even with relatively long raw to avoid the aforementioned designs and a

ren still to the opposite end, swelling test facility to create a rapid and

'up there, nebulises and thus hinders the fully even flow of the hydraulic fluid as well

if the trapped air escapes through ao perfect ventilation even when fully

the ventilation openings attached here or the load on the machine and continuous work

valves. sequence are guaranteed.

If the intake process is not carried out a few times, according to the invention, starting from to calm the liquid level interrupts the device mentioned at the beginning, proposed and / or runs with a throttled amount of liquid, 25 that the inlet opening comes in in the direction of flow undesirable air inclusions that expand in the middle of the end wall then compressed by high pressure liquid conical distributor head is arranged and that uad must be topped up, with an increased outlet openings in the area of the tip of the There is a risk of accidents due to the so-called »air bomb distribution head.

kung «, d. H. great destructive force if the pipe bursts, 30 In a further embodiment of the inventive concept

consists. kens has chosen to enlarge the inlet port

An attempted inclination of the pipe during a cone angle of about 8 to 10 ° is considered special

the filling process did not bring the desired, expediently for the reduction of the inflow velocity

Success, quite apart from the fact that he also demonstrated his ability to do so.

complex, mechanical equipment required 35 Furthermore, it can be useful to increase are. the calming effect, on the circumference of the inlet-out of the German Auslegeschrift 1 197 248 is two or more rows of outlet openings at piece Auxiliary device on pipe testing presses are connected next to each other in the axial direction Assign an inlet opening that widens the direction of flow.

knows. This leads to a certain reduction in the 40 The inlet piece according to the invention is notable

Inflow velocity reached, through the particular through the advantageous division of the

axial entry into the pipe without further deflection of the liquid jet when it hits the distributor

and distribution, however, remains the calming we-

largely imperfect. throw back after hitting the inner wall

The same applies to one from the German 45 of the examinee.

Patent 823 946 known press head at Einrich- By the embodiment according to the invention is for pressing pipes. Here, too, it is achieved that the radially emerging liquid follows a direct axial inflow of the liquid keitspaket a largest possible cross-section to the Verin the pipe, even if it is due to the increase in cross-section, so that in the exit area almost the tion after entry as well as deflection and deflection 50 the entire inner surface of the test object is acted upon, a certain reduction in the inflow velocity which results in a substantial reduction in the outlet will. speed and the spray effect even at full

From the German patents 845 719 and utilization of the machine is achieved.
I 220 171 are still testing devices for pipes. This results in fast filling times and those in which the first axially inflowing possibility of moving the machine continuously and automatically through 90 ° and radially against the inner wall as well as operating personnel for the pipe to be tested being distracted. To save on these.

There is no reduction of the inflow due to the intensive venting process

speed. In addition, accident safety is significantly increased as the education

it is beneficial to see that the exit from the inlet 60 of air bubbles and thus an "air bomb effect"

let piece is only made at one point, so that kung «is prevented when the pipe bursts,

there is still a high spray effect, there is also a considerable relief of the

if the liquid is fed in at full pressure, high pressure pump station, as the reduction

will. the required high pressure -

In the case of one of the US Pat. No. 2,578,728, the amount of water is less.

known device is in one embodiment. In the drawings, the invention is explained

the main embodiment is shown schematically by a hole in the pipe axis,

amount of water directly with a sharp jet in the test- In detail shows

1 shows a longitudinal section through a test device on a smaller scale,

F i g. 2 shows a longitudinal section of the Pmf device in the area of the inlet side with only one row of Inlet piece provided with outlet openings,

3 shows a cross section through the testing device in the area of the outlet openings.

The pipe 1 is sealed in a manner not shown in detail with the test head 2 and the inlet piece 3 connected. At the end of the pipe facing away from the inlet side a ventilation device 4 is provided.

The cup-like inlet piece 3 has an inlet opening 31 which widens in the inflow direction ends at an end wall 32, in the center of which a conical distributor head 321 is arranged.

Outlet openings are equally advantageous over the circumference 33 is provided, which (not shown in detail) also in the axial direction in two or more Rows can be arranged side by side. The number or design and size of the outlet openings 33 are expediently chosen so that that once a sufficient strength of the remaining material and such an escape ensured is that the entire inner surface of the test specimen in the area of the outlet openings 33 through a liquid ring is applied, so that the inflow velocity and spray effect as far as possible be reduced.

The entering liquid jet 5 is reduced by the widening inlet opening 31 the inflow velocity, is split up by the tip of the distributor head 321 and along it its outer surface deflected. At the foot of the distributor head there is a deflection against the inflow direction of the deepening beam and then through the exit openings 33 a radial deflection perpendicular to the inner surface of the tube 1, where there is a throwback and then a largely calmed and slowed movement in the direction of the venting device 4.

Due to the steady and calm increase in the

Liquid level is an excellent vent

given so that the filling process without interruption

and can be carried out with the full amount of liquid available.

Another advantage is that the Wasjser calmed hardly any scale of the detonation due to its relatively slow speed Rinse off the inner wall of the pipe, so that the effect of Entxo ventilation device is not affected by the build-up of scale.

Claims (3)

Claims: 15 1. Inlet piece on pressurized water testing machines, especially for pipes, in which the through a Inlet opening axially inflowing liquid ao radially via outlet openings arranged at several points on the circumference of the inlet piece is deflected against the inner wall of the test object, and in which the outlet openings in Seen in the direction of flow in front of the front wall are classified, characterized by the combination of the following features: a) the inlet opening (31) has an enlargement in the direction of flow, b) in the middle of the end wall (32) is a conical one Distributor head (321) arranged and c) the outlet openings (33) are located in the area of the tip of the distributor head (321). 2. Inlet piece according to claim 1, characterized in that the cone angle of the expansion tion of the inlet opening (31) is about 8 to 10 °. 3. Inlet piece according to claims 1 and 2, characterized in that on its circumference two or more rows of outlets are arranged next to one another in the axial direction. 1 sheet of drawings