DE3125729C2 - Pipe of an explosion coating plant - Google Patents

Abstract

The present invention relates to a system for applying a coating to workpieces by high-temperature spraying. The tube (I) according to the invention is closed at one end (2) and open at the other end (3). According to the invention, at least one insert (8) with a wedge-shaped cross-section is housed inside the inner channel (6) at the outlet end (3) of the tube (I). The invention can be used most successfully in metallurgy, shipbuilding and mechanical engineering, in the chemical industry, energetics, etc.

Description

3 4

& This prevents the powder particles from adhering to the Fig. 10 a longitudinal section through an inventive

% Surface of the insert excluded, which is the stable embodiment of the tube according to the invention

: ität the process of targeted redistribution with a cylindrical attachment;

ΐ of the powder particles, Fig. 11 has a longitudinal section through an embodiment

%. To increase the operational safety and the Zuver- 5 shape of the pipe according to the invention, which has a cyclical

■ Permeability of the system, it is advantageous to use the hollow-cylindrical attachment with a cooling jacket

'■: as well as with an inlet and an outlet for the inventive pipe of the explosion coating

r? Run coolant. plant has the shape of an ordinary one, on one

For applying a coating to the upper end 2 closed and at the other outlet end

before a flat, reciprocatingly displaceable io 3 open tube 1 (see Fig. 1). On the wall of the

Workpiece «and on the side surface of a cylinder tube 1 in the immediate vicinity of the closed end

shaped, rotatable workpiece, it is useful, 2 are an electric discharger 4 and one to connect the

within the outlet end of the tube two opposite inner channel 6 of the tube 1 with a mixing device

.; to attach horizontal inserts. Such an arrangement is more useful for gases (not shown in the drawings)

; The use of the insert ensures the formation of a nozzle 5 arranged at the end of the closed

Ji plus the Eadcs 2 of the tube 1 running through the narrower zone of the spot is a connection to the

. ' fenden line of symmetrical metal patch of loading inner channel 6 of the mentioned pipe 1 with a metering

i _: layering. In order to use the technological possibilities of the device for coating material (in the drawings

■ Explosion coating system with a connecting piece 7 (not shown) serving the invention is attached

■ ;; according to the pipe and the time required for 20 According to the invention is within the inner channel 6

Auxiliary operations of the conversion of the explosion at the outlet end 3 of the tube 1 at least one in the transverse

coating system for applying a coating cut wedge-shaped insert 8 housed Dsr a

Mining 8 on workpieces of different shapes is V-shaped, as can be seen from FIG. 2 can be seen from

it is advantageous to have the outlet end of the pipe made of a material whose hardness is that of the pipe material

In the form of a cylindrical attachment, exceeds 25 fes,

half of which at least one insert is housed. Opposite the outlet opening of the tube 1 is a

To increase the reliability and the operating support 9 of a workpiece 10 (see. Fig. 1) is arranged It is also advantageous for this design variant to be safe- The holder 9 is equipped with a device (in the drawing, the cylindrical attachment with a cooling jacket (not shown) for moving the workpiece 10 to execute. 30 provided.

It is known per se from US Pat. No. 2,072,845 that in FIG. 3 of the drawings is an under application Outlet end of the tube of a powder coating of the invention, shown in FIG. 1 tube shown on

processing well-processing coating device with brought metal patch of the coating shown,

to provide a cylindrical attachment. The outline of the coating spot is marked with the line 11

known training, it is not referred to as 35. The respective thickness of the coating is

an explosion coating plant, but around one drawn along three circumferential lines

Flame spray gun, in which the powdery cutting is indicated.

Material to be stratified through a central channel by means of FIG Compressed air is blown out and in the cylindrical workpiece 10, which is moved in a rotating manner, is mounted overlay a mixing chamber with evenly around the 40 layering spots, which by means of a pipe Central channel distributed outlet nozzles for the combustion were applied, the outlet cross-section according to voltage gases are formed. Which is designed in the cylindrical Auf- Fig. 1/2. The one for a single spot in Block-running section of the central channel has no- F i g. The outline shown in FIG. 3 is in FIG. 4 for the stain on the left Built-in components that change the cross-section. outside by means of the continuous outline 12

In the following, the invention is drawn on the basis of concrete 45, the second spot from the left has the

th exemplary embodiments with reference to the dashed outline 13 and the third from the left

Drawings explained in more detail The dot-dashed outline 14 shows the next spot. F i g. 1 shows a longitudinal section through the structure according to the invention, similar to that in FIG. 3 drawn in cut-out

ße pipe of the explosion coating plant; Thicknesses are shown in Fig. 4 that go through the

Fig. 2 shows an embodiment of the inventive 50 superposition resulting thickness profile drawn Tube in section along the line U-II of FIG. 1; net. F i g. 3 a using the inventive, FIG. Figure 5 of the drawings shows an embodiment

in Fig. 1 shown tube applied metal patch of the tube according to the invention 1. Inside the inner

the coating with partial longitudinal cuts; channel 6 is an insert at the outlet end 3 of the tube 1

F i g. 4 some overlapping coating spots with 55 are arranged. In the wall of the tube 1 and in the Longitudinal sections; Nozzles 15 or 16 are mounted on the wall of the insert, F i g. 5 an embodiment of the invention which the cavity of the insert with a source (in Tube with a hollow insert in longitudinal section; the drawing not shown) of coolant connect.

F i g. 6 shows a longitudinal section through an embodiment, the connector 15 is used to feed and the socket shape of the pipe according to the invention with two opposing t> o zen 16 for discharging the coolant,
overlying inserts; F i g. Figure 6 of the drawings shows an embodiment

F i g. 7 an embodiment of the inventive pipe of the invention, in which within the Tube in section along the line VII-VIl of FIG. 6; Inner channel 6 at the outlet end 3 of the pipe 1 has two FIG. 8 shows, using the opposite inserts 17 or 18 according to the invention (see FIG. 7 of the

in FIG. 6 shown pipe applied coating 65 drawings) are housed,

tungsmetallfleck with some longitudinal cuts; Fig. 8 of the drawings shows an applied

F i g. 9 some overlapping coating spots with the formation in FIG. 6 shown tube of the exploded longitudinal sections; coating system applied metal patch of the coating

5 6

layering. The outline of the coating spot is set with the workpiece 10 with the help of a drive

the line 19 designated. Here, too, the respective dik device is rotating,

ke shown by means of drawn sections. It understands every metal stain of the coating, which under

that the constriction of the outline 19 arises. Application of the pipe described is applied,

if the inserts 17, 18 at the pipe outlet left and 5 has different thicknesses at different points

are arranged on the right. The tube shown in Fig.6 / 7, smaller on the wider and larger on the

you would have to think rotated by 90 ° to the narrower section of the coating spot as it is from

Location of the outline 19 to be revealed. F i g. 3 of the drawings can be seen

F i g. Fig. 9 of the drawings shows some overlap- When superimposing the mentioned bede Coating spots of the in F i g. 8 the way shown io stratification spots is the total thickness of the applied layer arise when the pipe and the workpiece relatively th coating layer during the process of are moved in a straight line to each other. The first outline application of the coating on the rotating work line 20 outside left is continuous, drawn as a piece 10 at different points of the second coating from the left following contour line 21 is a dashed layer constant, as shown in FIG. 4 of the drawings drawn, the borderline of the third left coating can be seen (see the right outer section of the Aufgetungsfleckes with the bullet point 22 and the boundary layer of the coating in the area of the left line of the fourth coating spot on the left with the outer spot). Such an immutability of Dashed line 23 is shown with two dots. The thickness of the coating layer to be applied becomes the coating formed by the overlapping spots achieved in that the sections of the surface of the tion is similar to FIG. 4 shown. 20 rotatable workpiece 10 (see FIG. 1), which is located in the

F i g. Figure 10 of the drawings shows an embodiment of the zone of formation of the wider area of the spot

of the pipe according to the invention, in which the omission of a smaller thickness of the coating layer (see FIG. 3

de 3 of the tube 1 are located as a cylindrical attachment 24 from the drawings), permanent action of the

is the diameter of the inner channel 25 of the upstream of the detonation products and the powder of the

Set 24 agrees with the diameter of the inner channel 25 to be applied coating material in comparison

6 of the tube 1 match. Within the channel 25 of the sections of the workpiece 10 (see FIG. 1 of the

cylindrical attachment 24 is at least one insert 8 drawings), which is located in the zone of formation of the

fastens narrower area of the coating spot larger

F i g. 11 of the drawings shows an embodiment thickness of the coating layer (see FIG. 3 of the drawing

of the tube according to the invention, the cylindrical 30 opening) are subjected to. In other words

Attachment 24 has a cooling jacket 26. Within the ten, the thinner areas overlap more than Channel 25 of the mentioned attachment 24 is a hollow - the thicker one, which gives the evenness,

set 8 housed The cavity of the insert 8 The in F i g. 5 of the drawings shown embodiment

stands via channels 27 and 28 with the cavity of the shape of the tube according to the invention functions after

Cooling jacket 26 of the attachment 24 in connection. The 35 of the method described above. To ensure reliable Cavity of the cooling jacket 26 of the attachment 24 is speed and the operational safety of the explosion coating

in turn to increase via nozzles 29 and 30 with a source of processing system when applying the coating,

Coolant (not shown in the drawing) is connected to the cavity of the insert 8 via the nozzle 15

manure. The connection piece 29 is used to supply and the connection piece a coolant is constantly supplied and via the connection piece

zen 30 for discharging the coolant. 40 16 continuously discharged. This increases the possibility of

The explosion coating system with an invented ignition of the starting gas mixture with which the

according to the invention, in FIG. 1 of the drawings shown- tube is filled, through the heated surface of the

th tube works as follows insert 8 excluded.

From the dosing device (in the drawings not shown in Figs. 6 and 7 of the drawings

shown) reaches the powdery coating material 45 tube having explosion system can be applied

via the nozzle 7 into the inner channel 6 of the pipe 1. gene the coating on the surface of a flat

The explosion mixture flows out of the workpiece at the same time, which moves back and forth Mixing device (not shown in the drawing) is set over supply and on the circumferential surface of a cy-

the connecting piece 5 into the inner channel 6 of the tube 1

By means of the electric discharger 4 (spark plug), the system functions essentially according to the above ignition and its spark causes the detonation of the method described. Everyone lies with this Explosive mixturecs. The coating area applied during the detonation was symmetrical Flow of gaseous detonation products in addition to that through the narrower section of the coating the floating powder with and flings it in tungsfleck.es (see Fig. 8 of the drawings) Direction of use 8. The current flows around the 55 line. In addition, each coating area instructs Surface of the insert 8, as a result, takes place in different places of different thickness, deliberately Redistribution of the mentioned particles in the larger on the wider and larger on the narrower Cross section of the flow of detonation products. The portions of the coating patch as shown in FIG. 8th The main effect of the detonation gases on the powder can be seen

(Acceleration and heating) takes place in the process.

area of the pipe 1, which stains a round cross-section, is the total thickness of the applied coating

At the outlet of the pipe 1, the novelty layer takes place when the coating is applied

distribution of the powder particles under the action of the insert- movable workpiece constantly at different points

zes 8. The use of only one insert 8 at Aus, as shown in FIG. 9 of the drawings can be seen (s.

at the end of the tube is appropriate for the application 65 any longitudinal section behind the outline of the

a coating on a round surface, e.g. a left outer coating spot, which is caused by the

disk-shaped or the end face of a cylindrical line 20 is limited). This is achieved in that

moderate workpiece. When applying the coating, the sections of the surface of the movable work

Piece, which is in the zone of formation of a wider area of the having a smaller thickness Coating stain (see Fig. 8 of the drawings), more often from the flow of detonation products and the material to be coated are acted upon than the sections of the surface of the workpiece which are in the zone of formation of a narrower, greater thickness coating spot (see FIG. 8 of the drawings) are located.

It is advantageous to use the pipe shown in FIG use if different powder distributions are required for changing workpiece shapes and movements are.

Before the application of the coating is then at the outlet end 3 of the tube 1 of the corresponding cylindrical Attachment 24 to the insert 8 housed inside the latter.

The in Fig. 11 of the drawings The explosion coating system having a pipe functions as described above. For the However, the reliability and operational safety are increased during the application! " the coating in the cavity of the insert 8 and the cooling jacket 26 of the cylindrical attachment 24 a permanent Circulation of coolant. The coolant passes through the nozzle 29 into the cooling jacket 26 of the cylindrical attachment 24 and then via the channel 27 into the space of the insert 8. From the space of the Insert 8, the coolant flows back via the channel 28 into the cooling jacket 26 of the cylindrical attachment 24. The coolant is removed from the cooling jacket 26 via the connecting piece 30

For this purpose 3 sheets of drawings

45

55

Claims (6)

1 2 res worsen the interaction consequences of the patent claims: Coating material with the combustion products of the detonation (acceleration, heating), especially 1. Pipe of an explosion coating plant, dcrs in the corners of the pipe duct, thereby reducing the quality which closed at one end and at the other 5 the applied coating due to the poor the outlet end of which is open, thereby characterizing the sticking of the flow around the corners of the pipe duct, that inside the inner channel the powder on the surface of the workpiece v.esent- (6) at least one borrowed is impaired at the outlet end (3) of the tube (1). In addition, the quadraim Cross-section of a wedge-shaped insert (8) below the table, applied using the pipe mentioned 10 coating different worn metal patch is 2. Tube according to claim 1, characterized marked thickness (larger in the center and smaller at the net that the insert (8) made of a fabric is angular areas of the square coating, its hardness that of the substance of the pipe (1) over the stain). The reason for this is that the if the material to be coated adhere to the surface of the 3. Pipe according to claim t, characterized marked 15 workpiece properties required (temperature net that the Einsau (8) made hollow and nozzle and speed) more with the powder particles in the (15) and (16) for feeding and discharging a center of the channel, where their concentration anyway Coolant has larger than present in the corners of the channel. 4. Pipe according to claim t, characterized marked- The entire, through the overlapping square The fact that the coating layer formed within the inner channel (6) at the outlet stretching thus has unde (3) of the tube (1) has two opposite inserts of different thicknesses at different points. Around ze (17) and (18) are housed. To obtain a uniform coating, a subsequent 5. Pipe according to any claim from 1 to low treatment of the coating surface necessary. 4, characterized in that the outlet end (3) The effective utilization factor of the to be applied of the tube (1) in the form of a cylindrical, at least 25 coating material decreases. at least one insert (8) possessing attachment (24) The invention is based on the object of a pipe is executed. for an explosion coating plant to create with 6. Pipe according to claim 5, characterized in a more suitable distribution of the particles of Benet, that the cylindrical attachment (24) has a cooling layer material in the cross section of the flow of the deto jacket (26) has 30 nation products is achieved, thus ensuring a uniform coating on the surface of the movable To achieve workpiece. The problem posed is achieved in that within the closed at one end and at the other The present invention relates to the technology of the open pipe outlet end of the explosion technique of applying coatings by means of a high layer system, according to the invention in internal temperature spraying and in particular relates to the duct at the pipe outlet end at least one in the transverse configuration of the pipe of an explosion coating unit wedge-shaped insert is housed.
ge. The invention is most successfully used in metallurgy. Such an embodiment of the pipe wan r- Energy, chemical industry, energetics as well as in the ship, that the effects of the detonation products and mechanical engineering, wherever the surface of the powder (acceleration, heating) at least Workpieces the properties of the coating plant - for the most part on the round in cross section and Material should have and the production of the entire pipe section which is therefore most suitable for this should take place. Workpiece made of the coating material. Through the inlet arranged at the outlet of the pipe Although the procedure for blast coating 45 set it becomes possible to target the necessary Has found wide use, however, offer redistribution of the powder particles in the cross-section of the known devices for carrying out said stream of detonation products simultaneously through-to-process no way to slide a coating. The metal spot of the using the ercher To manufacture thickness. the mentioned pipe's coating refers to The known explosion coating systems have 50 different places with different thicknesses (smaller on hold a pipe, the canal of which has a round cross-section the wider and larger to the narrower area of the having. Such an embodiment of the transverse spot). When superimposing the cut of the pipe channel is optimal with regard to the mentioned spots in the course of the procedure for the application interaction sequences, Acceleration, heating of the coating on the moving workpiece is constant when the powder coating material is burned, 55 the thickness of the coating layer is constant products of the detonation. When applying the reason for this is that the portions of the the coating on a moving workpiece below the surface of the moving workpiece, which is Application of the said pipe form the coating in the zone of formation of a wider part of the flexure patch their overlap creates a coating (with less thickness of the coating layer) layer, which are located at different points (in the area, more often the action of the current in the area the overlap of the coating spots additonation products and the powdery coating the thickness of the material to be coated compared to the areas of the work layers) has different thickness. Piece, which is in the zone of the formation of a narrow In order to get better overlapping of the coating spots to the ren part of the coating spot (with larger thickness, a pipe was proposed, the inside of which is exposed. channel has the shape of a square in cross-section (see. It is advisable to make the insert from a material) U.S. Patent 3,884,415 of May 20. 75). When applying bodies, the hardness of which is the hardness of the raw material over-coatings using the aforementioned raw step.