DE1514402B2 - TOUCH-PROOF IONIZING AIR JET - Google Patents

Description

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The invention relates to an apparatus. Another object of the invention is that of

to eliminate static charges and in particular to create an explosion-proof, touch-safe

on a touch-safe ionizing air nozzle, ren ionizing air nozzle, which is both in a

whereby a beam of ionized air is directed to a specific blowgun as well as into a stationary air duct Zone or area is directed to be installed on surfaces 5.

To blow away firmly adhering particles and at the same time a touch-safe, static

to neutralize the particles and surfaces. Suppressors are created, which apart from the

An ionizing air nozzle is described and parts to be neutralized are to be arranged. the, in which a high-voltage alternating current Furthermore, the device should be light and economical generator It should be able to be produced directly with a needle and the nozzle, it should be a robust construction bond and will possess the needle coaxial within the tion and be highly effective. But is electrically isolated from it. It is the object of the invention in a pre-die Nozzle is an air stream from a compressed air line direction to generate an ionized air jet, guided parallel to the needle and z. B. in pistol shape with barrel and handle, with through the conically directed high voltage field 15 of a blow-out nozzle made of conductive material, the one ionized. Since the air flow surrounds the ionization field concentrically, the metal needle is attached to a strengthens, the nozzle provides an enlarged area provided with an insulating sheath wire ionizer Air. This is not only for the elimination of conductors through capacitive coupling, a high alternation of Particle effectively, which is present as a result of electrical voltage, solved according to the invention by static attraction adhere to a surface, 20 that the partially exposed end of the cable inside also for the neutralization of the particles half of a bore in the barrel with an isolating one charges and / or the surfaces and lifts the sheath and then with a conductive sleeve Forces on which the particles are surrounded by the surfaces around which an insulating tube is spaced want to retire. is concentrically arranged, through which the metal needle connected to the end of the sleeve connected to the end of the sleeve in earlier ionizing air nozzle designs The high voltage runs directly with the needle to the tip of the nozzle and the metal needle was connected, inputs were connected to the high through the capacitor formed in this way restrictions and precautions required. AC voltage is connected. At first there was the possibility that the staff, The amount of "capacitive coupling will be like this." who operated the device, randomly the energized needle, chosen 30 that any electric shock or a for example with the finger, touched and here- arc at the needle tip is avoided, got an electric shock. Furthermore, while at the same time a high degree of air ionization there was always the likelihood of a spark within the gap between the tip of the needle and or an arc that is reached as a result of a dielectric circumference of the nozzle opening, Irish breakthrough of the air gap between the 35 In an advantageous embodiment of the invention Needle tip and the nozzle could occur. As a result, it consists of a barrel and a handle the risk of explosion caused by such a spark housing made of a conductive material (e.g. geken is conditional, was the use of the earlier Gössen) and is with the one lying on earth potential Constructions in a flammable environment conductive braiding of the cable is not allowed to be electrically connected. After all, it was because of the direct other. This becomes an operator of the device applying the high voltage to the needle there is additionally protected against electric shock, noticeable corona glow present. If the case of a further advantageous embodiment of the earlier devices for the neutralization of sensory- Invention the needle is in the opening of a Borrowed photographic film was used, was held an insulating disk, which at the same time channels it is necessary to have a diaphragm or a 45 around the nozzle for the compressed air flowing parallel to the needle To arrange shield in order to have a loading in such a way. This increases strength and security exposure of the film by corona annealing to remove the device.

switch. In the tip of the nozzle B is according to the further

It is also a device for ionization, advantageously a design of the invention

known from air, in which the two electrodes, 50 insulation spatially separated around the needle tip

between which the field arise and an ionisa- tion is arranged. This will make the tip of the needle

tion is not intended to effect directly, but rather on capacitance compared to the conductive surface, apart from

by means of a high voltage source in front of the nozzle tip, shielded,

are bound. This device is so it is possible that the high voltage potential,

but not a nozzle through which a jet 55 which reaches the needle and the gun body and

ionized air is to be generated. accordingly the nozzle is laid out a conical

It is therefore an aim of the invention to provide a calm course from the needle tip to the circumference

to create a secure ionizing air nozzle. the nozzle opening.

Another object of the invention is to provide an ionization device with the new invention an ionizing air nozzle, which was created in 60 air nozzle that is both touch-proof in a flammable environment as well as because corona phenomena do not occur, can. can be used in a flammable environment. Furthermore, an explosion-proof and safe. Without additional light shielding you can secure ionization air nozzle can be created with the device according to the invention, which is able to neutralize or clean a sensitive film 65 borrowed films without to neutralize and purify without any risk of exposure. The Lufttung to cause, although a light shielding nozzle can also be used in both a blowgun is missing. as well as in a stationary air line.

The invention relates to the construction details and the combinations of parts, which will be understood from the following description in conjunction with the drawings. It shows

F i g. 1 is a perspective of a touch-proof ionizing blowgun according to the invention;

F i g. 2 shows a section along the lines 2-2 of FIG.

F i g. 3 the touch-safe ionization blowgun in an exploded view,

F i g. 4 is a perspective view of a touch-proof ionizing air nozzle according to the invention;

F i g. 5 shows a section along the lines 5-5 of FIG. 4,

6 shows the touch-safe ionizing air nozzle in an exploded view.

Referring now to the drawings, in which like numerals refer to like parts, there is shown in FIGS. 1, 2 and 3 a tamper-proof ionizing blowgun which has a barrel designated A , an end-of-barrel nozzle B Cable C extending coaxially within the barrel, a sleeve D encapsulating the end of the cable, a conductive sleeve E arranged in a ring around the sleeve, a pipe F lying concentrically to the sleeve, which carries the cable in the longitudinal direction inside the barrel and a conductive one Has needle tip G, which extends from the end of the sleeve through the tube and coaxially protrudes into the nozzle mouth.

The housing A is formed from one piece of molded metal, preferably aluminum, with the barrel 12 extending substantially at right angles to the handle 14 in the manner of a pistol. The barrel 12 has a longitudinal bore 16 which is provided at one end with an internal thread and an inner neck part 18 with a threaded opening 20 which is in communication with the bore. A hook 22 is attached to the exterior of the barrel 12 for hanging the pistol when it is not in use.

The handle 14 has a bore 24 which extends from the handle to a centrally located chamber 26. A normally closed by a spring valve H is screwed into the chamber 26 and fixed there by means of a head screw 28. A socket 30 at the lower end of the bore 20 is connected to a hose, not shown, which is in communication with a source of compressed air. An inner channel 32 connects the chamber 26 via the valve H with the longitudinal bore 16 in the barrel. The valve H itself is a conventional, normally closed, pneumatic stopcock which contains a piston 34 which can be reciprocated within a plunger 36. As shown in Figs. 2 and 3, the spring 38 pushes the piston 34 from left to right, so that the head 34 α normally rests against the sealing ring 40 and closes its longitudinal opening and that of the plunger 36. A cap 42 is screwed into the chamber 26 within a correspondingly threaded opening and seals it off with the aid of the sealing ring 44. At the same time, the cap carries the entire valve arrangement H.

An actuating pin 34 b cast on the piston 34 extends through a stuffing box into the cap and can be moved by a pusher 46. The pusher 46 is rotatably held on a dowel 48 which is pressed into a projection on the bottom of the barrel 12. If the pusher retracted by a finger 46, then the piston slides 34 so that a header 34 is not longer α to the sealing ring 40 rests. Accordingly, the compressed air passes from the bore 24 through the plunger opening 36 in the chamber 26 into the channel 32, whereupon it flows out through the barrel bore.

A second passage 52 is in the rear of the

ίο handle 14 is present and extends upward into a recess 54 on the back of the barrel. The cable C runs through the passage 52 into the recess 54 and then essentially at right angles through an externally threaded tube portion 56 which is screwed into the internally threaded neck 18. The recess 54 facilitates the right-angled bending of the cable C and its introduction into the barrel bore 16. A cover plate 58 closes the recess 54 after the cable has been inserted into the barrel 12. Head screws 60 hold the cover plate 58 in place.

The nozzle B is also a metal part, for example aluminum, and is generally tubular in construction. It has a conical tip 61 with an opening 62. A circular disk 64 sits in nozzle B near the threaded end and is held in place by cap screws 66. The disk 64 is made of an insulating plastic with a high dielectric constant, for example made of polymethylene oxide, an acetal resin made from crystalline polymerized formaldehyde. As can be seen from FIG. 2, the face of the disc 64 is concavely rounded at 65 and a plurality of circumferential openings 68 penetrate the disc to allow easier passage of air from the barrel. As will be described later, there is also an axial bore 70 which is used to hold the needle G. The threaded end of nozzle B is screwed into the corresponding internal thread at the end of barrel 12 and held in place by cap screws 72. Circumferential orifices 74 extend through the cylindrical wall of nozzle B immediately behind the beveled tip. These orifices 74 allow atmospheric air to be drawn into the nozzle as pressurized air enters the barrel from the conduit. In this way a vacuum can be avoided when the compressed air flows through the front parts of the nozzle. It is desirable that the air flow through the nozzle B longitudinally parallel to the needle axis G so that it helps to support the high voltage field which is tapered from the needle tip to the front tip of the opening 62. In the latter regard, an insulating sleeve 76 is glued within the opening 62, whereby the tip of the needle G is shielded from the conductive surface of the opening, apart from the foremost point of the nozzle tip.

The cable C is preferably made of a multiple twisted copper wire 80, which with a Polyethylene envelope 80 is covered, followed by a polyvinyl resin layer 84. A metallic ground screen 86 is braided around the polyvinyl layer 84 and encapsulated in an outer insulating layer 88, which in turn can be, for example, a polyvinyl polymer or copolymer.

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As can be seen from FIG. 2, the layer 88 seen shaft 112 and a middle, simultaneously and the screen 86 of the cable are peeled off, so that the formed nut 114. The shaft 112 is pulled through the front end through the pipe section 56 axial opening 106 of the spacer tube and the can and the cable approximately approximately into the bore 100 of the conductive sleeve E -80% of the barrel 12 occupies. A cap 90 from FIG. 5 screws. The nut 114 is rotated within the VerPolyäthylen is countersunk over the end of the cable C until the end wall of the sleeve E melted firmly to completely cover the previously exposed wire against the inner end wall 104 of the spacer tube at the tip. When that is drawn. The conductive sleeve E is now firmly arranged inside-stripping the outer layer 88 and the braided half of the tube, so that the latter the screen 86 is accomplished, a short, freely io different elements lies at a safe distance in the laid piece of the screen 86 in the Recess with respect to the barrel 12 once it is screwed onto the 54th. A prong-shaped, metallic clamp 92 is pipe section 56. Finally, the one with good electrical contact around the exposed nozzle B is screwed inside the barrel 12, where part of the screen 86 is placed. A ground line 94 is in connection with the axial bore 70 of the disk 64 via the clamp 92 and the needle tip 110 pushes on the free 15.

End of a connection eyelet 92, which is attached to the cover plate.

58 is fastened with the aid of a screw 98. air pistol is operated in the usual way,

The bare end of the cable C, which is stretched by a high voltage (not shown) the pipe section 56 in the bore 16 of the barrel generator from about 5000 to 15,000 V, lies within the insulating layer D until the voltage is applied to the conductor 80 and the ground screen connects polyethylene cap 90 against the end of layer 86 at the entrance of cable C. It's bumping into. The layer D is also made of a synthetic material, note that the needle G is produced via the conductive layer E material with a high dielectric constant and is capacitively coupled to the conductor 80. Between, for example, made of polymethylene oxide, and one of the needle G and the conductive sleeve E is neither cylindrical in shape with an inner longitudinal bore 25 to the conductor 80 nor to the housing A and the housing A, which is a direct cable end to the outer diameter of the bare, directly connected grounding screen 86 is adapted. Contact. The capacitance between the sleeve E and

The conductive sleeve E consists of a thin central conductor 80 which is approximately 7 to 10 walled, stainless steel tube, which is an end-10 micro-microfarad.

wall and an axial bore 100 has. The amount of capacitive coupling between the inner diameter of the sleeve E takes the outer one of the sleeve E and the cable conductor 80 is selected so that the cylindrical wall of the layer D can slide on. If any surge or arcing can be avoided while the insulating layer D is inserted into the conductive sleeve E at the needle tip 110, both are substantially longitudinally at the same time a high degree of air ionization within the same extent and concentric around the cable C 35 halfway through the gap arranged between the needle tip and the. However, no part of the conductive sleeve E circumference of the nozzle opening 62 is reached. The insulating ring 76 in direct electrical contact with the wire 80th completely surrounds the tip of the tube 56 from the insulating poly needle G so that the annular surface 62 is in front of the methylene oxide, there is also no direct needle tip 110. Correspondingly, the electrical contact of the conductive sleeve E with the 40 potential between the needle tip 110 and the grounding screen 86 or its lead 94. Nozzle B creates a conical field. This cone-shaped

Finally, the spacer tube F surrounds the conductive running field is reinforced by the air flow, sleeve E and isolates the latter from the barrel as soon as the latter by depressing the trigger 12. The spacer tube F is also from a di- 46 flows through the nozzle. Although the air stream built up by the electrical high-quality plastic, blown at nozzle B is highly ionized, occurs for example from polymethylene oxide, and has neither a corona nor an arc, through a cylindrical shape with an outer wall 102, which either exposes a film or an explosive is slightly smaller in diameter than the barrel environment could be ignited. Therefore results in the tion 16, so that an air gap is formed. The ring-capacitive coupling of the needle G via the conductive, shaped gap between the tube F and the sleeve E with the cable C and the central conductor catch of the barrel bore 16 enables the flow 80 a touch-safe, a film not spoiled by compressed air through the Gun barrel. The inner wall sliding, explosion-proof ionizing gas pistol of the spacer tube F is marked at the rear end with Ge. 4, 5 and 6 a further execution

provided thread and is shown on the external thread of the approximate shape of the invention, which is screwed to-pipe section 56 until it next differs on the inner neck 55 in that it abuts a touch-18. The inner diameter of the distance-safe ionizing air nozzle relates to which tube F fits around the outer diameter of the sleeve E which has no associated trigger. An end wall 104 of the tube has. Furthermore, in the following respects, lower res F has an axial opening 106, which is different: The embodiment contains an insulating countersink that receives the shaft of the needle G and the housing A1, a hexagon nut located on its front side. In addition, has borrowed nozzle, a cable Cl, which the housing the end wall 104 flats 108, which can be grasped by a transverse to the direction of the nozzle, a conductive suitable socket wrench to sleeve El, which the cable inside the housing screwing in the spacer tube F on the tube encloses a needle G1, which is coaxial within piece 56 to facilitate. 65 of the nozzle and installed in the housing

The needle G consists of a conductive material which is attached to the conductive sleeve E1 across For example, made of stainless steel, and contains one whose axis rests and lines /, which for this purpose the-Spitzc 110 with high polish, one with thread, to introduce compressed air into the housing so that

this passes through the nozzle in the longitudinal direction parallel to the needle.

Housing A 1 is molded from a high dielectric plastic, such as polystyrene, and is rectangular in block shape, although any other shape would work as well. The front surface of the block has an externally threaded cylindrical projection 120 which is molded in one piece therewith. A bore 122, in which the cable C1 lies, extends transversely through the block A1 . A stepped bore 124 extends from a recess 126 in the projection 120 to the bore 122. An internally threaded opening 128, into which a pipe section 130 of the Conduit / threaded is coaxial with bore 124 and spaced apart from bore 122. Air passages 132 extend through block A 1 from recess 126 to inlet port 128, and these passages are laterally offset from transverse bore 122 to block any communication avoid.

The nozzle B 1 is generally comparable to the nozzle B described earlier, but its disc 64 is now replaced by the projection 120 which forms part of the block A 1. The nozzle B1 can be made of stainless steel and have a hexagonal body 134, which is followed by an elongated, tapered sleeve 136. An interior 138 merges into an annular opening 140 at the nozzle tip. A cylinder ring 142 made of insulating material is glued into the opening 140 so that the tip of Gl cannot "see" any bare conductive material of the circumference. A multiplicity of openings 144 distributed around the circumference extend through the base part of the sleeve 136 in order to simplify the flow of the compressed air through the nozzle B1 without a vacuum being able to generate turbulence. It can be seen that the nozzle B1 is screwed to the projection 130 and can be tightened with the aid of a wrench which engages the hexagonal body 134.

The cable C1 is a common one in all respects and is generally comparable to the stripped portion of the cable C which was inserted within the barrel 12 of the air postole. In the present embodiment, the braiding and the outer covering are omitted, and the cable C1 contains an inner twisted conductor, a polyethylene sheath and the usual vinyl outer covering.

The conductive sleeve El of this example is simply a tubular element of less hardness than the sleeve E and can be made of brass, since this material has good conductivity and can be notched by the needle G1 as soon as the latter is pressed against here. The inner diameter of the sleeve El can slide over the cable Cl, and the outer diameter should fit slidably into the transverse bore 122.

The needle G1 is essentially identical to the needle G and has an elongated point 146, a threaded shaft 148 and a nut 150. In the present case, however, the shaft end 148 is tapered at 152 so that a point is formed which is conical presses into the sleeve El . Once the cable Cl is inserted with the conductive sleeve El into the transverse bore 122 of the needle shaft is threaded into the bore 124 148, until the tip 152 pushes against the sleeve. As a result of the screwing in of the nut 150, the tip 152 is pressed slightly into the sleeve E1, whereby not only a positional definition but also a good electrical contact can be achieved. The needle tip 146 is now axially separated from the end of the nozzle or orifice tip, as shown in FIG. 5 shows.

It should be noted that no part of the needle G1 or the sleeve El is in direct electrical contact with the inner conductive core 80. The coupling between the sleeve E1 and the high voltage at the core 80 is purely capacitive. A copper wire or ground lead 154 is clamped behind nozzle B1 once it is screwed onto the protrusion and the opposite end of lead 154 is attached to tubing 130. As can be seen from FIG. 4 results, the pipe section 130 is connected to a compressed air source with the aid of the lines /. The conduits / are in the form of any metallic pipe of a shape suitable for the plant. According to FIG. 4, a plurality of air nozzles are connected to a general air line / using conventional connections 156 connected to tube 158. A high voltage alternator, not shown, is connected into the cable conductor 80 and the earth, ie lines /.

It should be noted that each nozzle is capacitively coupled to the cable conductor 80 via the associated sleeve E1 , the needles G1 ionizing the air which flows through the oil nozzles without sparks, arcing or corona discharges occurring at the tips.

Although the invention has been described in great detail, the description is provided for illustrative purposes only, not to be construed as a limitation, however, since the invention is carried out in different ways without departing from its idea.

Claims (4)

Patent claims: 1. Device for generating an ionized air stream with a blow-out nozzle made of conductive material, which concentrically surrounds a metal needle, to which a high alternating voltage is applied by capacitive coupling via a wire conductor provided with an insulating sheath, characterized in that the partially exposed end of the cable ( C) is surrounded within the bore (16) of the nozzle barrel (12) with an insulating jacket (D) and then with a conductive sleeve (E) around which an insulating tube (F) is arranged concentrically at a distance, through which the with the The metal needle (G) connected to the end of the sleeve (E) runs through to the tip of the nozzle (B) and the metal needle (G) is connected to the high AC voltage via the capacitor formed from the parts (80, D, E). 2. Apparatus according to claim 1, characterized in that the nozzle barrel (12) and a associated handle (14) are jointly made of a conductive material and that therewith a conductive braid of the cable lying at ground potential is electrically connected. 3. Apparatus according to claim 1 or 2, characterized in that the conductive needle (G) 109 515/26 is held in the opening of an insulating disc (64). 4. Device according to claims 1 to 3, characterized in that an insulating ring is arranged spatially separated around the needle tip in the opening in the tip of the nozzle (B). 1 sheet of drawings