SU1729609A1 - Device for powder supply to flame spraying burner - Google Patents

Abstract

The invention relates to thermal coating, in particular, to devices for supplying powder to burners for flame spraying. The goal is to simplify the design and reduce the cost of its manufacture. For this, the locking mechanism is a rectangular prism with a stopper made in the form of symmetrical protrusions on the opposite faces of the copier. A copying element with a stopper is placed on the end of the shank of the pusher. A groove is made along the axis of the pusher. 4 il.

Description

The invention relates to thermal coating, in particular, powder feeding devices, used primarily in flame spraying burners.

A device for supplying powder to a thermal spray burner is known, which contains a shut-off unit made in the form of an elastic tubular valve and a spring-loaded pusher cooperating with it, which is hingedly connected with a control handle.

When operating with such a burner, the powder is supplied by a constant pressing of the finger control knob, which increases the worker's slackness and reduces labor productivity, especially when applying coatings on large surfaces.

Closest to the invention is a device for supplying powder to a thermal spray burner, comprising a shut-off unit associated with a pusher spring-loaded relative to the burner body, a stopper connected to the pusher and mounted relative to it rotatable in a plane parallel to the direction of movement of the pusher, a copier and slider mounted to interact with a copy element.

In this device, the shut-off unit is an elastic tubular valve, the stopper is made as connected with the pusher and installed relative to it with the possibility of rotation in a plane parallel to the direction of movement of the pusher of the shackle and mounted in

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the slider is spring-loaded to the surface of the copier, made in the form of two V-shaped stepped grooves directed in one direction, the ends of the component sides of which are interconnected, and the bases of the individual steps are successively ascending in the direction of movement of the pusher.

During operation of this device, the powder supply is turned on by pressing the trigger connected with the pusher with a finger, after which the trigger is lowered and it remains in the forward position, the powder supply is turned off by pressing and releasing the trigger again.

The disadvantages of this device are its complexity and low-tech details, since to form a profiled surface of a copier, made in the form of two V-shaped stepped successively ascending grooves directed to one side, it is necessary to use high-precision boring machines with special equipment and tools. This greatly increases the labor intensity of manufacturing this part and the cost of equipment.

The purpose of the invention is to simplify the design of the device by improving the manufacturability of its parts.

To do this, in a known powder feeding device in a thermal spray burner, comprising a shut-off unit connected to a pusher spring-loaded relative to the burner body, a stopper connected to the pusher and mounted relative to it rotatably in a plane parallel to the direction of movement of the pusher, a copy element and a slider installed with the possibility of interaction with a copying element, the copying element is made in the form of a rectangular prism, having at the base a square with side B. On two opposing false lateral faces of said prism are made symmetrical projections having a height H, which serve as a stopper. The slider is spring-loaded relative to the burner body and has the ability to move in the direction perpendicular to the axis of rotation of the stopper and the copier element. In the body of the burner axial movement of the pusher is made, the distance between which satisfies the inequality

B +.

FIG. 1 shows a device, side view; in fig. 2 shows section A-A in FIG. 1, the pusher in the rear position (powder feed closed); in fig. 3 - the same pusher

in the forward position (powder feed open); in fig. 4 shows a section BB in FIG. 3

The device for supplying powder to the thermal spray burner comprises a shut-off unit mounted in the cavity of the housing 1, consisting of an elastic tubular valve 2 springed relative to the housing 1 by a spring 3 of the pusher 4 with a pressure pin 5 pressed into it and

10 a thrust pin 6, pressed in the housing 1 and passing through the slots 7 in the pusher 4. In the push bar 4 there is a rectangular groove 8 in which a tubular valve is placed between the pins 5 and 6

15 2. In the shank of the pusher 4 there is a groove 9 through which the axis 10 passes, fixed in the sidewalls 11 of the double-arm lever 12 connected to the housing 1 by means of the axis 13. At the end of the shank the pusher 4 on

0, axis 14 is provided with a stopper 15. Stopper 15 is made in the form of protrusions with a height H on the copier element 16, which is a rectangular prism, having a square at the base with a side B. Stopper 15 and

5 copy element 16 is spring-loaded to the shank of the pusher spring 17.

In the case 1 of the burner there is a step bore 18, in which it is installed with the possibility of reciprocating

0 movement of the slider 19, spring-loaded with respect to the burner body 1 by the spring 20. The slide 19 is provided with a shoulder to limit the stroke in the direction of the pusher 4. In the burner body 1 along the axis of the pusher 4 and

5, a symmetric axis has a groove 21, the width of which satisfies the inequality B +.

The device works as follows.

0 When the powder feed is turned off, the pusher 4 is in the rearmost position (Figs. 1 and 2). In this case, the stopper 15 with the copier element 16 is in the groove 21, i.e. the stopper 15 is oriented along the axis

5 pusher 4 (Fig. 2). The flexible tubular valve 2 is compressed with pins 5 and 6.

To ensure the supply of the powder, the free shoulder of the double-shouldered lever 12 moves the index finger of the hand towards itself.

0 At the same time, the second lever arm 12, connected through the axis 10c with the pusher 4, overcoming the resistance of the spring 3, moves the pusher 4 forward. The stopper 15 with a copy element 16 out of the groove

5 21. When moving forward, the copier element 16 of one of its faces interacts with the slider 19 and rotates on the axis 14 together with the stopper 15 by 90 ° so that the stopper 15 is oriented across the axis of the pusher 4 (Fig. 3). While the slider 19 is embedded in the bore 18, but remains spring-loaded to the edge of the copier element 16. The forces of the springs 17 and 20 are designed in such a way that the copier element 16 does not rotate under the action of the slider spring-loaded to it 16 and is limited by the pin 6. When stopping the pusher 4 in the extreme position, the slider 19 remains spring-loaded to the edge of the copier element 16.

After releasing the free arm of the double-arm lever 12, the pusher 4 under the action of the spring 3 moves backward against the stop of the stopper 15 into the wall of the housing 1 (Fig. 3). The flexible tubular valve 2 is open to supply powder. When the pusher 4 moves backwards, the slider 19 jumps off the edge of the copier element 16 and moves forward as far as it will go by the shoulder to the step of the bore 18 (Fig. 3). To stop the supply of powder, move the free arm of the lever 12 back to itself. When moving the pusher 4 forward, the slider 19 again turns the copier element 16 with the stopper 15 by 90 °. When moving the pusher 4 under the action of the spring 3 back, the stopper 15 freely enters the groove 21. In this case, the pins 5 and 6 compress the elastic tubular valve 2 and the supply of powder to the burner is stopped.

The proposed design of the device allows to significantly reduce the labor intensity and cost of its manufacture due to the fact that it is not necessary to use special

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Claims (1)

New equipment, tools and accessories. All parts can be. Made on the usual universal equipment. Apparatus of the Invention A device for supplying powder to a thermal spray burner, comprising a shut-off unit mounted on the burner housing, connected to a pusher spring-loaded relative to the burner, and a pusher locking mechanism including a stopper connected to the pusher and mounted relative to it with a possibility of rotation in a plane parallel to the direction of movement pusher, copier element and a slider mounted to interact with a copier element, characterized in that, in order to simplify the construction and reduction of the cost of its manufacture, the copier element is made in the form of a rectangular prism, having a square at the base, symmetrical protrusions made on two opposite lateral faces of the prism serve as a stopper, and the slider is spring-loaded relative to the burner body and has the ability to move the direction perpendicular to the axis of rotation of the stopper and the copier, while in the body of the burner axial movements of the pusher are made, the distance between which is less than the length of the stop ra, but more than its maximum transverse size .. $ cgl