EP0258748A2 - Apparatus and process for the surface treatment of tubes with liquids - Google Patents

Abstract

In a treatment container with a bath of the liquid and a movable support for the pipes in the bath, an inlet device (3) with a spatially inclined drainage path (4) is arranged on one side of the treatment container (1) above the bath (2), which leads one end of the tubes (5) when immersed in the bath (2). A rust-like support body (8) is arranged in the treatment container (1), the surface (9) of which is sloping downwards from the side with the inlet device (3) to the other side of the treatment container (1). The rust-like support body (8) is connected at both ends to a separate controllable lifting and lowering device (12, 12a). On the other side of the treatment container (1) above the bath (2) there is an outlet device (14) with a spatially inclined drainage path (15).

Description

The invention relates to a device for the surface treatment of pipes with liquids, consisting of a treatment tank with a bath of the liquid and a movable support for the pipes in the bath.

Metallic pipes are surface-treated by pickling in pickling tanks. To do this, the pipes must be inserted into the pickling tubs, moved in the pickling liquid and removed again. This is followed by rinsing in washing tubs.

The pipes are introduced into the vats in the form of packages which are inserted into chains or U-shaped pickling brackets and brought into the tubs by a crane, moved there and removed again (Otto Vogel "Manual of the metal pickling shop", Verlag Chemie GmbH , Weinheim / Bergstrasse, 1951, pp. 342-347). With this method, the chains or pickling bars are immersed in the bath, the pipes lie next to each other even when moving in the package, and it is practically impossible to encapsulate the baths to extract vapors.

From DE-AS 16 21 624 a cylindrical tub is known in which plungers are arranged in the bottom, which are moved vertically up and down. As a result, the tubes lying loosely in bundles in the container are moved relative to one another. The penetrations of the tappets through the floor must be sealed and the insertion into and The pipes must be removed from the tub by hand.

From DE-OS 15 46 155 a frame is known which has rail-shaped supports arranged one above the other in several levels, each for a single tube. By moving the frame back and forth in the tub, the ears roll on the rail-shaped supports. The pipes have to be put on by hand, the frame dips into the tub and it is practically impossible to decouple the tub.

The invention has for its object to avoid the disadvantages of the known methods and to enable a uniform treatment of the surface of tubes without manual insertion and removal of the tubes and to enable good encapsulation and suction of the tubs.

This object is achieved according to the invention in that on one side of the treatment tank (1) above the bath (2) there is an inlet device (3) with a spatially inclined drainage path (4), which leads one end of the tubes (5) when immersed causes in the bath (2) in the treatment container (1) a rust-like support body (8) is arranged, the surface (9) of the side with the inlet device (3) to the other side of the treatment container (1) is sloping, the rust-like Support body (8) is connected on both ends to a separate controllable lifting and lowering device (12, 12a), and on the other side of the treatment container (1) above the bath (2) there is an outlet device (14) with spatial sloping runway (15) is arranged. The support body consists of a box-shaped frame. The surface serving as a support for the pipes is preferably zigzag-shaped. The treatment container and the top of the support body are provided with strips made of wood or plastic, so that direct contact of the pipes with the material of the container and the grate, which consists of stainless steel or plastic, is avoided. The support body can be attached to the lifting and lowering device with only two weakly movable articulated connections, which plunge into the bath. The connection is also made by rigidly welded plates as tie rods, which absorb the movement by elastic deformation in the manner of a leaf spring, so that no joint connection is immersed in the bath.

One embodiment consists in that the first treatment tank (10 is designed as a pickling tank, a bearing (6) for the pipes (5) is arranged in front of the inclined run-off track (4) in the inlet device (3), in the bath (2) via the Length of the rust-like support body (8) vertical stamps (13) are arranged, which partially penetrate the surface of the support body (8) in the lowered position and whose surface has an opposite inclination to the inclination of the surface (9) of the support body (8) and at a movement of the support body (8) in the vertical direction cause the pipes (5) to roll, the outlet device (14) from the treatment tank (1) opens into an inlet device (18) in a second treatment tank (19), which acts as a rinsing tank is formed, and the first treatment container (1) with the inlet (3) and outlet device (14) is encapsulated. The rinsing tank can also be equipped with vertical punches that penetrate the surface of the support body.

A preferred embodiment consists of the outlet device (14) of the pickling tank (1) being immersed in the washing liquid (20) in the inlet device (18) of the washing tank (19). This completely encapsulates the pickling container in a simple manner.

A preferred embodiment consists in that a plurality of washing containers (19, 24, 25) are connected in series, the outlet devices (30, 31) and inlet devices (28, 29) are formed in a combined manner in adjacent washing containers, and the outlet device (32) of the last washing container ( 25) opens into a collecting device (41). A good rinsing effect is thereby achieved in a simple manner.

A preferred embodiment consists in that closure flaps (47, 48, 49, 50) with actuating devices for opening and closing the closure flaps are arranged in the outlet devices (14, 30, 31, 32). The actuating device can consist of a common drive for all flaps or of individual drives for each flap. This makes it possible to bring the tubes on the rust-like support bodies into the exact transfer position in front of the spatially inclined run-off paths with closed flaps and then by opening the flaps to expire. This prevents bending and tangling, particularly in the case of thin pipes, and optimal immersion behavior of the pipes is achieved.

A preferred embodiment consists in that the actuating devices for opening and closing the closure flaps (47, 48, 49, 50) consist of bearings (51a-51g), pivot points (52a-52l), one of the bearings (51a-51g), pivot points ( 52a-52l) and flaps (47, 48, 49, 50) connecting linkage (53a-53u) and a drive (54) which is connected to a bearing (51f).

A preferred method for operating the device is that the rust-like support bodies (8, 23, 26, 27) with the tubes (5) lying thereon by leading one of the lifting and lowering devices (12, 12a) out of the bath () 2, 20) are raised, and by traversing the other lifting and lowering devices (12, 12a) in front of the outlet devices (14, 30, 31, 32) with spatially inclined runways (15, 22, 28, 29, 35) .

A preferred method for operating the device is that the closure flaps are opened before reaching the transfer position of the rust-like support body (8, 23, 26, 27) before the spatially inclined runways (15, 33, 34, 35) and after the pipes have run out (5) in the following treatment containers (36, 37, 38, 41) are closed again.

• Fig. 1 zeigt einen ersten Behandlungsbehälter, in dem das Beizen der Rohre erfolgt, und drei nachgeschaltete Behandlungsbehälter, in denen das Waschen der gebeizten Rohre erfolgt.
• Fig. 2 ist ein Schnitt gemäß I-I in Fig. 1 mit in der Mitte aufgeschnittenem rostartigem Auflagerkörper zur Darstellung eines Stempels.
• Fig. 3 ist ein Schnitt gemäß II-II in Fig. 1.
• Fig. 4a zeigt den rostartigen Auflagerkörper gemäß Fig. 1 mit den aufliegenden Rohren in der untersten Stellung.
• Fig. 4b zeigt den rostartigen Auflagerkörper gemäß Fig. 1 mit der Bewegung der aufliegenden Rohre in leicht angehobener Stellung.
• Fig. 5a zeigt das rechte Ende des rostartigen Auflagerkörpers gemäß Fig. 2 in Vergrößerung mit einer Gelenkverbindung.
• Fig. 5b zeigt das rechte Ende des rostartigen Auflagerkörpers gemäß Fig. 2 in Vergrößerung mit einer fest eingeschweißten, als Feder wirkenden Zugstange.
• Fig. 6 zeigt die rostartigen Auflagerkörper mit den Rohren in Übergabestellung vor den räumlich schrägen Ablaufbahnen und geschlossenen Verschlußklappen sowie deren Betätigungsvorrichtungen.

The invention is explained in more detail with reference to figures.

• Fig. 1 shows a first treatment tank in which the pipes are pickled, and three downstream treatment tanks in which the pickled pipes are washed.
• FIG. 2 is a section according to II in FIG. 1 with a rust-like support body cut open in the middle to show a stamp.
• FIG. 3 is a section according to II-II in FIG. 1.
• FIG. 4a shows the rust-like support body according to FIG. 1 with the pipes resting in the lowest position.
• FIG. 4b shows the rust-like support body according to FIG. 1 with the movement of the pipes resting in a slightly raised position.
• FIG. 5a shows the right end of the rust-like support body according to FIG. 2 in enlargement with an articulated connection.
• Fig. 5b shows the right end of the rust-like support body according to Fig. 2 in an enlarged view with a welded-in pull rod acting as a spring.
• Fig. 6 shows the rust-like support body with the pipes in the transfer position in front of the spatially inclined runways and closed shutters and their actuators.

On one long side of the treatment container (1), an inlet device (3) is arranged above the bath (2), which has a spatially inclined drainage path (4). The tubes (5) lie on a feed table (6) and roll when opening the flap (7) on the runway (4), so that they advance with one end and first immerse in the pickling bath (2) and the air in Inside of the pipes is pushed out to the other end. A rust-like support body (8) is arranged in the treatment container (1), the surface (9) of which is sloping downwards from the side of the treatment container (1) with the inlet device (3) to the other side. The rust-like support body (8) is connected to the separately controllable lifting and lowering devices (12, 12a) on both ends via tie rods (10, 10a) and tie bar (11). A plurality of stationary punches (13) are arranged in the treatment container (1), which partially penetrate the surface of the support body (8) when the support body (8) is in the lowered position (extended illustration). The surfaces of the punches (13) have an inclination that is opposite to the inclination of the surface (9) of the support body (8). As a result, the pipes (5) in the bath (2) lie in a V-shaped overlay. By slightly lifting and lowering the support body (8) by means of the lifting and lowering devices (12, 12a), the leg lengths of the V-shaped support are changed and the tubes are moved back and forth. The movement of the support body (8) over the two lifting and lowering devices (12, 12a) can take place uniformly, unequally or in opposite directions, so that uniform rocking or rocking movements of the tubes (5) can take place. In the upper part of the treatment tank (1) above the bath (2) is in the A discharge device (14) is arranged on the long side and consists of a slot in the side wall, a spatially inclined run-off track (15) and a shaft (16). The shaft (16) is immersed in the inlet device (18) of a second treatment container (19) in the bath (20) so that air is sealed off. The second treatment tank (19) is designed as a rinsing tank and contains a water bath. The treatment container (1) is completely encapsulated and provided with a suction device (21). After the pickling time has ended, the support body (8) is raised in an inclined position by advancing a lifting and lowering device (12, 12a) (dash-dotted line). After an adjustable time, when the pipes have run empty, the second lifting and lowering device (12, 12a) moves to (dashed position), so that the pipes (5) from the support device (8) through the slot in the side wall onto the inclined Roll down the runway (15) and fall through the shaft (16) into the bath (20) onto the inclined receiving surface (22) of the inlet device (18) in such a way that one end first immerses it in the wash water and air and pickling residues at the other end be rinsed out of the pipes. The support body (8) then moves back to the lowest position and the next batch can be filled into the container (1). The tubes (2) on the receiving surface (22) remain in front of the raised support body (23) (dashed position) and roll on the surface after the support body (23) has been moved down.

The washing stage contains three treatment containers (19, 24 and 25) with the support bodies (23, 26 and 27) and the receiving surfaces (22, 28 and 29) as well as outlet devices (30, 31 and 32), which again consist of oblique slits in the side walls of the treatment containers (19, 24 and 25) and spatially oblique drainage paths (33, 34 and 35). The support bodies (23, 25 and 26) are fastened with tie rods (36, 37 and 38) via a common yoke 39 to a traverse cross member (40), which are attached to two separately controllable lifting and lowering devices, as shown in FIG. 1 are shown. Washing is carried out in the same way as pickling. After the washing time, the support body (19, 26 and 27) are raised as in the pickling stage by advancing a lifting and lowering device. By trailing the second lifting and lowering device while simultaneously lowering the first lifting and lowering device by a small amount, the support bodies (19, 26 and 27) are placed in front of the slightly obliquely arranged slots in the longitudinal walls in such a way that the pipes with their idling ends come last Immerse in the wash water of the next treatment tank. This ensures that the pipes are flushed in the same direction in which they run empty. A rounded, fixed collecting grate (41) is arranged behind the last outlet device (32), from which the pipes can be removed by a crane. The pipes (43) and (44) guide the wash water of the basin (25) and (24) from the overflows (46) and (45) to the opposite side in the basin (24) and (23), so that the wash water passes three basins in counterflow to the treated pipes and is discharged at the overflow (44) of the basin (23). Deionized water (deionized water) is applied to the basin (25), the basin (24) can also be charged with normal water.

In the pipe (43) is a conductivity meter installed in order to optimally adjust the deionized water consumption.

In FIG. 6, closure flaps (47, 48, 49, 50) are arranged in the outlet devices (14, 30, 31, 32). The flaps are shown in the closed position. The closure flap (47) is connected to the bearing (51b) via the bearing (51a), rod (53a), pivot point (52a), rod (53b), pivot point (52b) and rod (53c). The flap (48) is also connected to the bearing (51b) via rods (53f and 53g) with the bearing (51c) and pivot point (52d), rod (53e), pivot point (52c) and rod (53d). Bearing (51b) is connected to the bearing (51f) via rod (53h), pivot point (52e), rod (53i), pivot point (52f), rod (53p), pivot point (52i) and rod (53q). Locking flap (49) is via rod (53o and 53n) with the bearing (51e), pivot point (52h), rod (53m), pivot point (52g), rod 53l), bearing (51d) and rod (53k) with the pivot point (52f) connected. The flap (50) is connected to the bearing (51g) and the pivot point (52l), the rod (53s), the pivot point (52k) and the rod (53r) to the bearing (51f) via rods (53u and 53t). The drive (54) is connected to the bearing (51f). When the drive (54) is brought into the upper position, all of the closure flaps (47, 48, 49, 50) are opened and the tubes (5) roll into the following treatment container.

The advantages of the invention consist in the fact that the tubes are introduced into the treatment containers automatically and without auxiliary means, the tubes are treated precisely and uniformly and complete encapsulation and perfect suction can be achieved.

Claims (8)

1. Device for the surface treatment of pipes with liquids, consisting of a treatment tank with a bath of the liquid and a movable support for the pipes in the bath,
characterized in that on one side of the treatment container (1) above the bath (2) there is an inlet device (3) with a spatially inclined run-off path (4) which leads one end of the tubes (5) to advance when immersed in the bath (2 ) causes a rust-like support body (8) is arranged in the treatment container (1), the surface (9) of which slopes downwards from the side with the inlet device (3) to the other side of the treatment container (1), the rust-like support body (8) the two ends are each connected to a separate controllable lifting and lowering device (12, 12a), and on the other side of the treatment container (1) above the bath (2) there is an outlet device (14) with a spatially inclined drainage path (15). 2. Apparatus according to claim 1, characterized in that the first treatment tank (1) is designed as a pickling tank, a bearing (6) for the tubes (5) is arranged in front of the inclined run-off track (4) in the inlet device (3) Bath (2) over the length of the rust-like support body (8) vertical stamps (13) are arranged, which partially penetrate the surface of the support body (8) in the lowered position and the surface of which is opposite Have an inclination to the inclination of the surface (9) of the support body (8) and, when the support body (8) moves in the vertical direction, cause the pipes (5) to roll, the outlet device (14) from the treatment container (1) into an inlet device (18) opens into a second treatment tank (19), which is designed as a rinsing tank, and the first treatment tank (1) is encapsulated with an inlet (3) and outlet device (14). 3. Apparatus according to claim 2, characterized in that the outlet device (14) of the pickling tank (1) in the inlet device (18) of the washing tank (19) is immersed in the washing liquid (20). 4. Device according to one of claims 1 to 3, characterized in that a plurality of rinsing containers (19, 24, 25) are connected in series, the outlet devices (30, 31) and inlet devices (28, 29) are formed in a combined manner in adjacent washing containers, and the Outlet device (32) of the last rinsing container (25) opens into a collecting device (41). 5. Device according to one of claims 1 to 4, characterized in that in the outlet devices (14, 30, 31, 32) flaps (47, 48, 49, 50) with actuating devices for opening and closing the flaps are arranged. 6. The device according to claim 5, characterized in that the actuating devices for opening and closing the flaps (47, 48, 49, 50) from bearings (51a-51g), pivot points (52a-52l), one of the bearings (51a-51g ), Pivot points (52a-52l) and flaps (47, 48, 49, 50) connecting linkage (53a-53u) and a drive (54) which is connected to a bearing (51f). 7. The method for operating the device according to one of claims 1 to 6, characterized in that the rust-like support body (8, 23, 26, 27) with the tubes (5) lying thereon by advancing one of the lifting and lowering devices (12, 12a) can be lifted out of the bath (2, 20) in an inclined position, and by traversing the other lifting and lowering device (12, 12a) in front of the outlet device (14, 30, 31, 32) with a spatially inclined drainage path (15, 22, 28, 29, 35). 8. A method of operating the device according to claim 5 or 6, characterized in that the closure flaps are opened before reaching the transfer position of the rust-like support body (8, 23, 26, 27) in front of the spatially inclined runways (15, 33, 34, 35) are and after the pipes (5) have run into the following treatment containers (36, 37, 38, 41) are closed again.

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