EP0199748A1

EP0199748A1 - Immersion device for galvanizing baths

Info

Publication number: EP0199748A1
Application number: EP19850905050
Authority: EP
Inventors: Ulli Weinberg
Original assignee: Fawilhelm Mazurczak Elektrowarme Inhaber Gerhard Mazurczak
Current assignee: Fawilhelm Mazurczak Elektrowarme Inhaber Gerhard Mazurczak
Priority date: 1984-09-29
Filing date: 1985-09-28
Publication date: 1986-11-05
Also published as: WO1986002110A1

Abstract

Le dispositif d'immersion, par exemple un chauffe-bain pour un bain de galvanisation, comporte une tête de connexion (1) pour l'introduction d'un câble de connexion (8) et un tube d'immersion (3) appliqué à la tête de connexion (1), en vue d'une immersion verticale dans le liquide du bain. Le système de support approprié possède une poutre de support (17), dont le corps porteur (21), pouvant être attaché au rebord du bain de galvanisation, comporte, sur le côté du dispositif d'immersion, deux cadres de suspension pour l'introduction et le maintien du dispositif d'immersion. La tête de connexion (1) possède sur des côtés mutuellement opposés deux dégagements (18) en forme de rainure qui dans la position installée sont horizontaux et parallèles l'un à l'autre, pour l'insertion essentiellement ajustée des cadres de suspension reliés au corps porteur (21).The immersion device, for example a bath heater for a galvanizing bath, comprises a connection head (1) for the introduction of a connection cable (8) and an immersion tube (3) applied to the connection head (1), for vertical immersion in the bath liquid. The appropriate support system has a support beam (17), the support body (21) of which can be attached to the edge of the galvanizing bath, comprises, on the side of the immersion device, two suspension frames for the introduction and maintenance of the immersion device. The connection head (1) has two groove-shaped recesses (18) on mutually opposite sides which in the installed position are horizontal and parallel to each other, for the essentially adjusted insertion of the connected suspension frames to the carrier body (21).

Description

Immersion device for electroplating baths

The invention relates to an immersion device with associated holding device, the further features of which are listed in the preamble of claim 1. If one speaks of an immersion device, this can also be, for example, a level probe, a temperature sensor, electronic dry-run protection, a float switch or the like. his. The field of application of electroplating baths also includes, for example, etching or pickling baths, i.e. Baths with aggressive liquids.

Known diving apparatuses of this type essentially consist of an essentially cylindrical connecting head to be held above the liquid level for the introduction of the connecting cable and the immersing tube which projects downwards and is held by the connecting head. Depending on the process liquid, glass, ceramic or metal materials are used for the dip tube. Coatings made of plastic or ceramic are also common. The electrical connections between the connection cable and, for example, the heating element arranged inside the immersion tube are made within the connection head.

To hold such diving devices, for example a bath warmer, screwed to the pool edge are generally aligned substantially horizontally Holding crossbeams are used, which are provided with a bore corresponding to the diameter of the dip tube. In use, the bath heater is simply pushed through this bore with its immersion tube in the axial direction, while the connection head rests on the traverse. To protect the dip tube and the connection head from damage, the bore edge can also be padded by a soft rubber insert. This bracket has the disadvantage that

Is not fixed I _Q, for example, under the influence of strong currents in the process fluid or Zugeinwirkungen on the connecting cable of the immersion heaters in its holder so that it can come to a contact between the immersion tube and pool wall, which leads to _j _g damage to the dip tube.

In another embodiment of a known bathroom heater, the holding crossbeam is also projecting in the direction above the liquid level

Provide 20 forks between which the bathroom warmer can be snapped in from the front. However, this attachment alone does not create the desired positional stability of the bath heater in relation to the process liquid basin.

25

The invention has for its object to provide an immersion device of the type mentioned, which by means of its holding device in a simple manner fixed in relation to the pool edge of the process liquid

30 can be fixed. This object is achieved by the characterizing feature of claim 1. Due to the straight holding recesses, the connection head of the immersion device is held in such a way that the immersion tube is also able to flow within the process liquid, even with strong currents

35 can not perform any unwanted movements that lead to contact with the edge of the pool. This in turn allows the dip tube to be in closer proximity to the Pool edge can be arranged without having to fear such unwanted contacts. This in turn creates a larger usable space with the same pool size.

Due to the characterizing feature of claim 2, the mounting of the immersion device is further improved. This takes place not only in two opposite side areas of the connection head, but also on a third side lying between them.

Due to the characterizing feature of claim 3, a twist-proof mounting of the immersion device is possible, whereby the positional stability of the immersion device within the mounting is further improved. In addition, the electric Anschlußka¬ will bels adjusted by the eligibility of certain rotational positions of the immersion device capable of ^'n, whereby, for example, unwanted tensile forces on the part of the connecting cable to the immersion device are avoidable. In addition, the space available for accommodating electrical parts is enlarged. By means of the characterizing feature of claim 4, the immersion device can be fixed in different rotary positions within the holding device, although a secure positional fixation against rotation is nevertheless ensured within a preselected rotational position.

A particularly secure mounting of the immersion device is guaranteed by the characterizing feature of claim 5; however, it is still possible to insert the immersion device smoothly into the holder. Due to the characterizing features of claims 6 and / or 7, a plurality of holding devices can be attached next to one another in a confined space on the edge of the pool. Due to the characterizing feature of claim 8, it is possible in a simple manner to side by side connect the relevant holding devices inseparably by mutual welding *. The Faskanten from each other thereby tangential side walls form with one another namely a V-shaped groove that simply execute by a weld bead ^'are üllbar.

Due to the characterizing feature of claim 9, the holding brackets lie in the holding position with a prestress directed against the groove base in the recesses of the connection head. This in turn improves the strength of the bracket. The resulting preload is also advantageous with regard to the high ambient temperature in electroplating baths, the holding device also being known to be made of plastic, as is known. In addition, this makes it possible to remove and reinsert an immersion device from a holding crossbar without mutual hindrance, even if the holding devices are located next to one another and are possibly firmly connected to one another, without the associated, on the holding bracket of a holding crossbar exerted spreading movements are hindered by a bracket of an adjacent crossbar.

The characteristic feature of claim 10 reinforces the transition area between the supporting body and the holding bracket, as a result of which higher weights can be absorbed by the holding crossmember without the risk of breakage.

Characterized by the feature of claim 11, the immersion device can be optionally connected to the holding device in different height positions. This is particularly advantageous in view of the fact that the clearance available above the basin filled with the process liquid is often limited in electroplating systems. One will therefore always endeavor to use the immersion device with the To connect the holding device so that its connecting head protrudes as far as possible beyond the edge of the pool. With this feature of the invention, the fixation of the immersion device at the edge of the pool can be easily adapted to the height of the liquid level in the pool.

Through the elongated holes in the support body according to claim 12, the distance of the immersion device from the pool edge can be adapted to the particular circumstances in operation. Due to the characterizing feature of claim 13, it is possible to fix the position of the connection cable outside the connection head so that no undesired deflection forces on the part of the connection cable are exerted on the connection head.

Through the openings or bores in accordance with the characterizing feature of claim 14, the retaining brackets can be additionally secured by a pulled-through connecting means. The diving device can also be protected against unauthorized removal by a sealing wire between these holes. The bore in the peripheral wall of the connection head for the connection cable described in the characterizing part of claim 20 also offers additional protection for this. The immersion device can thereby be fixed directly and firmly, for example with a sealing wire, within the holding crossmember.

A particularly intimate contact between the holding recess and the holding bracket is achieved by the characterizing feature of claim 15. This further improves the fixation and exact guidance of the immersion device within the holding device. According to the characterizing features of claims 16 and 17, the connection head is composed of a cap part and a flange part on the dip tube side. Both parts enclose the connection space for the electrical lines. The snap-on cover offers advantages in the manufacture of the immersion device and in its use. During assembly, all electrical connections can easily be made through the opening at the top and the conductor wires can be laid neatly. After assembly, the terminal compartment is hermetically sealed against the mostly aggressive environment by the snap-on cover. If changes have to be made to the bathroom heater, for example in the electrical system, the cover can simply be lifted off again and the desired change made. By eliminating screwing movements when closing the cover, undesired twisting forces on the electrical leads are avoided. Once the electrical cables have been installed, they remain in place. Due to the characterizing feature of claim 18, additional control parts such as circuits or the like can be added to the inside of the cover if necessary. be accommodated. An increase in the overhang dimension of the immersion device need not be associated with this if, in accordance with the characterizing feature of claim 19, height compensation is possible by selecting a different, higher holding recess for the engagement of the holding traverses.

Particular advantages for the practical use of the immersion device result from the characterizing features of claims 21 to 23. The intermediate rings which can subsequently be inserted between the cap and flange part enable the bathroom heater to be better adapted to the particular operating conditions required. If, for example, a large height adjustment range is desired, this can be achieved by inserting several intermediate rings. The volume of the connection space can also be increased as a result. If, however, the user attaches importance to a low overall height of the connection head, this can be achieved by removing all intermediate rings, deliberately dispensing with the possibility of height adjustment. The characterizing feature of claim 23 prevents the screws arranged in the connection space from coming into contact with aggressive vapors or liquids. By means of the characterizing feature of claim 25, the immersion devices can be subsequently changed in a simple manner and thereby adapted to certain special tasks.

The invention is explained for example with reference to the figures. Show it:

1 shows a vertical section through a connection head of an immersion device formed by a bath warmer with a snap-in holding device, FIG. 2 shows a perspective view of such a device

3, a vertical section through an alternative form of a connection head with an inserted intermediate ring, FIG. 4 a vertical section analogous to FIG. 3 without

Intermediate ring (non-height-adjustable bathroom heater), FIG. 5 is a view of the interior of the connection head in the direction of arrow A according to FIGS. 3 and 4 (without electrical lines),

6 shows a vertical section analogous to FIG. 1 with a raised cover, FIG. 7 shows a perspective top view of the opened connection head, FIG. 8 shows a front view of two immersion devices fixed in lateral abutment at different height positions, 9 shows a plan view of the immersion devices according to arrow IX in FIG. 8.

1, the essentially cube-shaped connection head 1 of a bath heater consists of a multi-part cap part 2 and the flange part 4, which serves to hold the immersion tube 3 and is screwed into the cap part 2 from below, the disc-shaped, radially expanded upper end edge of the immersion tube 3 between - See two ring-shaped seating surfaces of cap part 2 and flange part 4. The insulating housing 5 of the connection head 1 encloses the connection space 6, into which the central rod 7 of the dip tube 3 from below and the electrical connection cable 8 open laterally. Terminal 9 connects the individual conductors. It is effectively strain relieved by the strain relief bracket 10 and the clamping nut 11. With the help of the sealing washer 12 and the cover 13, the connection space 6 is sealed off from the environment. For this purpose, the square cover 13 with its circumferential locking projections 25 is pressed into corresponding grooves in the cap part. In the intermediate space 14 between the cover 13 and the likewise square transparent pane 15, for example, a type plate can be inserted which is secured by ultrasonic welding between the cover 13 and the pane 15 against the penetration of aggressive vapors or liquids which impair the legibility.

As is clear from FIG. 1, the holding brackets 16 engage in a form-fitting manner around the insulating housing of the holding crossmember 17 in one of the holding recesses 18 that run horizontally around the insulating housing as a rectangular groove. The locking lug 19 engages behind the portion of the retaining recess 18 away from the basin edge, as a result of which the bath heater is fixed exactly in its position in connection with the cube shape of the connection head 1. The support body 21 lies with its front edge 33 in the further, level groove-like holding recess 18 of the connection head 1. A plurality of circumferential holding recesses 18 are arranged one above the other on the insulating housing 5.

The shape of the holding crossmember 17 is clear from FIG. 2. The U-shaped shape is formed by the two holding brackets 16 as U parallel legs 20 and the supporting body 21 as U connecting legs 22. The two vertically continuous elongated holes 23 are used to fasten the holding cross member 17 to the edge of the immersion bath by means of two screws two mutually parallel side walls 34 which extend in the longitudinal direction of the holding bracket 16. The edge between the side walls 34 and at least the surface 35 of the support body 21 is designed as a bevel edge 36. The holding brackets 16 have, over a part of their length facing away from the carrying body 21, a course which is slightly curved towards 37. In the transition area between the supporting body 21 and the holding brackets 16, the holding cross member 17 is provided with stiffening cheeks 38 projecting beyond its surface 35. The slot guide 24 arranged on the rear side of the carrying body 21 serves to guide the connecting cable 8 in the carrying body 21.

8 shows two connection heads 1 with lids 13 of different heights, the right connection head 1 being held between the holding bracket 16 via its upper holding recess 18 and the left holding head 1 via its lower holding recess 18. The inside of the cover of greater height serves to accommodate electrical equipment. The grid dimension of the height difference between the different covers 13 is equal to the spacing grid 40 between two holding recesses 18 arranged one above the other U parallel leg 20 or in the transition area between these and the connecting leg 22 arranged holes 26, for example, a sealing wire 39 can be pulled. If this additionally penetrates the bores 28 (FIG. 1) horizontally made in the peripheral wall 27, then. de.ι_ — Bath warmer completely protected against unauthorized removal.

An alternative embodiment for the connection head of a bathroom heater according to the invention is shown in FIG. 3. The dip tube 3 is in turn held by the flange part 4, the screw connection being carried out in this case from above. The intermediate ring 29 is seated between the flange part 4 and the multi-part cap part 2, both the flange part and the intermediate ring being able to have a holding recess 18. A particularly simple construction is achieved in that the outer circumference of the intermediate ring 29 or the flange part 4 jumps like a step. As a result, one side of the holding recess 18 is formed by the parting line 32. Cap part 2, intermediate ring 29 and flange part 4 are firmly connected to one another by the screws 30 running vertically from top to bottom in the housing projections 31. The screws lie in the connection space 6 and, like this one, are hermetically shielded from the aggressive environment by the snap cover 13, analogously to the exemplary embodiment described above. It is easy to see that both the number of holding recesses 18 and the height of the connection space 6 can be varied by inserting further intermediate rings 29. Only the length of the screws 30 must be adjusted to the overall height.

Fig. 4 shows an embodiment of such a connection head without an intermediate ring. Cap part 2 and

Flange part 4 are in turn firmly connected to one another by the screws 30 in the housing projections 31. The connection head 1 only has a holding recess 18. The height adjustment was dispensed with in favor of a low overall height.

5 and 7 show a view of the interior of the connection head after the cover 13 has been removed. In order to ensure the greatest possible free space in the connection head for the electrical connections, the housing projections 31 for the four screws 30 are located in the corners of the cube-shaped insulating housing 5.

Claims

Expectations

1. At the pool edge of a galvano bath or the like. immersion device which can be fastened by means of a holding device, e.g. Bath warmer, measuring probe or the like. with the following features:

- The immersion device contains

- A connection head (1) to be held above the liquid level and made of insulating material for the introduction of a connection cable (8) and for sheathing the connection devices and

- A dip tube (3) attached to the connection head in a liquid-tight manner for vertical immersion in the bath liquid. The holding device consists of a holding cross-piece (17) which stands essentially horizontally from the edge of the pool in the direction of the space above the liquid level,

- Their attachable to the pool edge support body (21) on the diving device side two retaining brackets (16)

The introduction and mounting of the diving device contains, characterized by the following features: The connection head (1) contains, on opposite sides, two horizontally and parallel to each other, groove-like holding recesses (18) for the essentially positive insertion of the holding bracket over part of its length. 1

2. Immersion device according to claim 1, characterized by a further, level, groove-like recess (18) on one between the parallel recesses

5 (18) located side of the connection head (1) for the essentially positive insertion of the front edge of the support body (21).

3. Immersion device according to claim 1 or 2, 0 characterized in

- That the insulating housing (5) of the connection head (1) located below the introduction of the connecting cable (8) has essentially the shape of a straight prism, 5 - from its base the dip tube (3) emerges downwards and - in its outer surface the holding recesses (18) are horizontally circumferential and

- That the holding bracket (16) in the horizontal plane of the 0 holding cross-member (17) can be elastically rebounded laterally and, in the locked active position of the holding device, the outer corners of the holding recesses (18) formed by the prism edges.

25

4. Immersion device according to claim 3, characterized in that the straight prism is a cuboid and its base is a square.

30

5. Immersion device according to claim 3 or 4, characterized in that the holding bracket (16) of the holding crossbeam (17) each have a mutually facing gg latching lug (19) at their free end, which section of the holding recess (18) remote from the supporting body (21) ) reach behind.

6. Immersion device according to claim 5, characterized in that the holding crossmember (17) has the shape of a horizontally lying U, the holding bracket (16) forming the two parallel legs (20) and the supporting body (21) the connecting leg (22) of the U. .

7. Immersion device according to one or more of the preceding claims, characterized in that the support body (21) has two vertical side walls which are parallel to one another and extend in the longitudinal direction of the holding bracket (16).

8. Immersion device according to claim 7, characterized in that the edge between the side walls and the surface of the support body (21) is designed as a bevel edge.

9. Immersion device according to one or more of the preceding claims, characterized in that the holding bracket (16) over a part of the length of the supporting body (21) has a slightly curved course in the direction of one another.

10. Immersion device according to one or more of the preceding claims, characterized in that the holding crossmember (17) is provided in the transition region between the supporting body (21) and the holding bracket (16) with the stiffening cheeks protruding beyond the horizontal plane of the holding crossmember (17).

11. Immersion device according to one or more of the preceding claims, characterized in that the insulating housing (5) has at least two retaining recesses (18) running in one plane and arranged one above the other for optionally receiving the retaining bracket (16).

12. Insertion device according to one or more of ⁱ vorher¬ g preceding claims, characterized in that the carrying body (21) a plurality of extending parallel to the U-parallel legs (20) slots

(23). 15

13. Immersion device according to one or more of the preceding claims, characterized in that the support body (21) on the outside of its 20 U connecting leg (22) with a recess

(24) for inserting an electrical connection cable (8) is provided.

14. Immersion device according to one or more of the preceding claims 25, characterized in that the holding crossbeam (17) in the region of the latching lug (19) at the free ends of the holding bracket (16) and / or in the transition regions between the supporting body 30 (21 ) and the holding brackets (16) have continuous openings or bores.

15. Immersion device according to at least one of the preceding claims,

35 characterized in that the holding recesses (18) and correspondingly the holding bracket (16) have a rectangular cross-sectional shape.

16. Immersion device according to at least one of the preceding claims, characterized in that the connection head (1) has an overhead cap part (2) and a flange part (4) on the dip tube side.

17. Immersion device according to claim 16, characterized in that the cap part (2) has a connection space (6) tightly sealing, in particular snap-on cover (13).

18. Immersion device according to claim 17, characterized by optionally usable lid (13) of different heights, a lid (13) of greater height on its inside being intended for receiving electrical devices.

19. Immersion device according to claim 11 and 18, characterized in that the grid dimension of the sleeve difference between different lids (13) corresponds to the spacing grid between two mutually adjacent holding recesses (18).

20. Immersion device according to one or more of the preceding claims, characterized in that a circumferential wall (27) radially enclosing the electrical connecting cable (8) is attached to the cap part (2) at right angles to the immersion tube axis, the circumferential wall (27) in its the inside of the horizontal leg (22) facing part has a horizontally extending bore (28).

21. Immersion device in particular according to one or more of the preceding claims, characterized in that in each case one or more circumferential Halteaus¬ recesses (18) on a preferably form-fitting with the cap (2) - and flange part (4) connectable and kit-like between these — part «Insertable intermediate ring (29) are arranged or formed by such. 0

22. Immersion device according to claim 21, characterized in that a plurality of intermediate rings (29) sitting one on top of the other between caps (2) and flange part (4) can be inserted 5.

23. Immersion device according to claim 21 and / or 22, characterized in that the cap part (2), flange part (4) and / or _Q intermediate rings (29) are connected to one another by screws (30) arranged in the connection space (6), these screws (30) lie in threaded bores (31) which run in housing projections (31) arranged on the inner walls of the caps (2), the flange part (4) and the 5 intermediate rings (29) in the direction of the dip tube axis.

24. Immersion device according to at least one of claims 21 to 23, 0 characterized in that a parting line (32) between the cap part (2) and flange part (4) or cap part (2) and intermediate ring (29) one side of a holding recess (18th ) forms. 5

25. Immersion device according to one or more of the preceding claims, characterized by towers arranged on the insulating housing (5) and / or on the cover (13) with recesses for pressing in threaded bushings and / or punchings for a drill bit.