Method of plasma and electromagnetic effect on dielectric material
SUBSTANCE: plasma is created by a plasmatron, plasma flow is created from it and acts on the material surface, the difference is that plasma is created and plasma flow is formed from it by the plasmatron with controlled parameters. Additionally the controlled flow of electromagnetic waves with frequency 0.5-5 GHz is created and directed to place of plasma flow contact with material surface. Regulation of plasmatron parameters and/or control of electromagnetic waves flow ensures and maintains the plasma temperature in its skin layer at place of the plasma contact with material surface in range 3000-5000 K.
EFFECT: increased productivity of destruction of solid dielectric bodies and expansion of scope of application.
The invention relates to a process for heat treatment of solid dielectric bodies, including their destruction, in particular bodies with a low coefficient of absorption of electromagnetic radiation (rocks, building materials etc).
The dielectric body, in particular rock, are brittle materials, so if resulting in mechanical stress σ exceeds the tensile strength σP, body crack and collapse. One way to create stress in the body is inhomogeneous heating, in which due to the temperature difference ΔT in the body arise voltage equal to σ=αΔ where E is young's modulus, α is the coefficient of thermal expansion.
Thus, the creation in the body of the temperature difference ΔT>σP/α ensures the destruction of the body.
There is a method of destruction of the dielectric bodies by electromagnetic radiation, which, impinging on the body by radiation, for example in the microwave range, produce heat. Because the absorption of radiation in the body, as a rule, is not uniform over its volume, due to the resulting temperature difference between the body parts in there thermomechanical stress, the value of which exceeds the tensile strength (see Polytechnical dictionary. CH. Ed. And. And. II Artobolevsky. M., "Soviet encyclopedia", 1976, S. 93).
The disadvantages of this method are the limitations of its application and the ungovernability of the process. The method can be effective, if the coefficient of absorption of radiation is important, and for most dielectric bodies it becomes so only at very high temperatures ≥1000 K, when the dielectric there is a significant electrical conductivity (see Urosev C. K., Kozlov S. A., Pavlov C. D. Design and manufacturing technology brazed metal-ceramic sites, part 1, M, Central research Institute of electronics, 1988, S. 43).
Closest to the invention to the technical essence and the achieved result is a destruction method based on plasma heating of dielectric solids, including the creation of a plasma, the formation of her plasma flow directed from the outside to the surface of a solid body and acting on it (see patent RU No. 2365731, CL E21B 7/15, 27.08.2009).
The disadvantages of this method are the low efficiency of heating due to the low thermal transmittance characteristic of the heating body hot gas, the role played by the plasma, and the limited application; excluded body with high thermal conductivity, so as to heat them leveled faster than the fed (see Kutateladze S. S. Heat transfer and the hydrodynamic resistance is of. - M.: Energoatomizdat, 1990, - S. 367).
Disclosure of inventions
The task, which directed the present invention is to provide a plasma-electromagnetic method of thermal destruction of the dielectric bodies with a low coefficient of absorption of electromagnetic radiation, effectively destroying the body even with increased conductivity.
The technical result of the invention is to improve the performance in the destruction of the solid dielectric bodies and the expansion of the scope.
The problem is solved and the technical result is achieved by a method of plasma-electromagnetic effects on the dielectric material lies in the fact that it generates a plasma by the plasma torch, the shape of her plasma flow and directly impacts them on the surface of the material, and the plasma create and shape of her plasma flow plasma torch with adjustable parameters, however additionally create a controlled flow of electromagnetic waves with a frequency of 0.5 to 5 GHz and direct it to the place of contact of the plasma stream with the surface of the material, thus, by adjusting the parameters of the plasma torch and/or control of flow of electromagnetic waves generate and maintain the plasma temperature in its skin layer at the site of contact of the plasma with the surface of the material is in the range 000-5000 K.
Preferably the flow of electromagnetic waves is served in the skin layer of the plasma at the site of contact of the plasma with the surface of the material from the material volume.
Can be served an additional stream of electromagnetic waves towards the main stream of electromagnetic waves.
After the formation of a plasma torch of a plasma stream, the latter can be reduced, and the power flow of electromagnetic waves is increased and thus keep the temperature in the range of 3000-5000 in the skin layer at the site of contact of the plasma with the surface of the material, while using the torch in the form of RF plasma torch, microwave plasma torch or hybrid plasma torch.
Plasma flow can be formed in a pulsed mode and/or the flow of electromagnetic waves create in a pulse mode and pulse mode plasma flow and electromagnetic waves synchronize to work out of phase.
In the course of the study revealed that the combination of creating a managed flow of electromagnetic waves with a frequency of 0.5 to 5 GHz and submitting it to the place of contact of the plasma stream with the surface of the material and the temperature of the plasma in contact with the surface of the material is in the range of 3000-5000 For simultaneous adjustment of the plasma flow by changing the parameters of the plasma torch and/or flow control solenoid ox is possible to change the depth of penetration of heat, and thereby to control the geometry of destruction, because as soon as the surface temperature of the dielectric material grows on the value of ΔT=σin/α, in the body there are cracks and it collapses. It was found that the combination of the above plasma parameters and the flow of electromagnetic waves can dramatically reduce the time of heating the dielectric material and to improve the performance of the process of destruction of the dielectric material.
The positive effect is achieved by the fact that due to the increased power density of the heat flow q in the dielectric material reduces the time τ of heating ΔT required for the destruction of the breed: ΔT~q√τ (see Skanavi, I., Physics of dielectrics, M., Fizmatgiz, 1958). The total energy W fall as W=qτ~(ΔT)2/q - const/q, and this helps to destroy the dielectric material, in particular rock.
Brief description of drawings
In Fig.1 schematically shows the influence of plasma flow and electromagnetic waves to destroy the dielectric body.
The best option of carrying out the invention
Using a torch to create a plasma stream 1, directing it directly on the surface of the dielectric material 2. Plasma, contacting it passes dielectric material 2 your energy, Naga the Wake of it. In the place of contact of the plasma stream 1 with the surface of the dielectric material 2 serves the flow of electromagnetic waves 3, generated, for example, a microwave generator. The flow of electromagnetic waves 3 is absorbed in a narrow skin layer 4 plasma (see Fig.1) in contact with the surface of the dielectric material 2, and allocates it all his energy, intensificar heating of the dielectric material 2.
If the dielectric material 2 has limited dimensions, the flow of electromagnetic waves 3 are served outside on its surface opposite the surface in contact with the plasma. The flow of electromagnetic waves 3, passing without losses through the dielectric material 2, the inside of the dielectric material 2 enters the contact zone of the plasma stream 1 with a dielectric material 2 and is completely absorbed in the narrow skin layer 4 plasma in direct contact with the surface of the dielectric material 2. This significantly increases the specific power density emitted on the surface of the dielectric material 2, and the opportunity to submit additional flow of electromagnetic waves (not shown) towards the main stream of electromagnetic waves 3 and, in addition, after the formation of a plasma torch of a plasma stream 1 last be reduced, and the rate of flow of electromagnetic waves 3 increases the ü and thus to maintain the temperature in the range of 3000-5000 in the skin layer 4 in the region of contact of the plasma with the surface of the material 2, that expands the possibilities for adjusting the exposure process on the dielectric material 2 and can improve performance when performing this action.
If the dielectric material 2 has an unlimited size (half-plane), or access its opposite side is obstructed, the flow of electromagnetic waves 3 directed towards the plasma stream 1, is formed in the volume of dielectric material 2 with electrodes (antenna), previously located in the dielectric material 2.
To empower the regulatory impact on the dielectric material 2 and, as a consequence, the expansion of the scope and increase productivity during the destruction of solid dielectric bodies 2 directed the formation of a plasma stream 1 in a pulse mode and/or the creation of a flow of electromagnetic waves 3 in the pulse mode, preferably pulsed modes of the plasma flow 1 and flow of electromagnetic waves 3 to synchronize to work out of phase.
The present invention can be used in mining and construction during drilling and construction of civil and industrial projects in the mountain areas, as well as for intense heating of various dielectric materials other is their industries.
1. The method of plasma-electromagnetic effects on the dielectric material, which consists in the fact that it generates a plasma by the plasma torch, the shape of her plasma flow and directly impacts them on the surface of the material, characterized in that the plasma create and shape of her plasma flow plasma torch with adjustable parameters, however additionally create a controlled flow of electromagnetic waves with a frequency of 0.5 to 5 GHz and direct it to the place of contact of the plasma stream with the surface of the material, thus, by adjusting the parameters of the plasma torch and/or control of flow of electromagnetic waves generate and maintain the plasma temperature in its skin layer at the site of contact of the plasma with the surface of the material is in the range of 3000-5000 K.
2. The method according to p. 1, characterized in that the flow of electromagnetic waves is served in the skin layer of the plasma at the site of contact of the plasma with the surface of the material from the material volume.
3. The method according to p. 2, characterized in that it serves the additional flow of electromagnetic waves towards the main stream of electromagnetic waves.
4. The method according to p. 2, characterized in that after the formation of the plasma torch plasma flow past reduced, and the power flow of electromagnetic waves increase and thus keep the temperature in the range of 3000-5000 in the skin layer in place of the contact of the plasma with the surface of the material.
5. The method according to any of paragraphs.1-4, characterized in that use the torch in the form of RF plasma torch, microwave plasma torch or hybrid plasma torch.
6. The method according to p. 1, wherein forming a plasma stream in a pulse mode and/or create a flow of electromagnetic waves in a pulsed mode.
7. The method according to p. 6, characterized in that the switching modes of the plasma flow and electromagnetic waves synchronize to work in antiphase.
FIELD: process engineering.
SUBSTANCE: invention relates to treatment of materials by plasma. Proposed sprayer comprises working chamber (2) to be evacuated that accommodates substrate (3) and plasma torch (4) to generated plasma jet (5) by heating of process gas. Note here that said plasma torch (4) has atomizer (41) to force plasma jet (5) from atomizer (4) and along lengthwise axis (A) in working chamber (2). Mechanical limiter (12) can be arranged downstream of atomizer (41) in chamber (2) to extend along said axis (A) to protect plasma jet (5) against undesirable later penetration of particles.
EFFECT: higher quality.
11 cl, 5 dwg
SUBSTANCE: in the first version of the invention the generator cathode (1) is made as an uncooled cylinder inserted tightly to an isolator (2). In the butt end the isolator has an opening coaxial to the cathode and right up to the isolator butt end a flat metal anode (3) is installed with opening coaxial to the isolator opening thus forming a channel for an electronic beam from the cathode butt end up to the generator output. In the second version the electron beam generator comprises a discharge structure placed directly in the working gas, which consists of a cathode, and isolator and anode; the generator cathode is made as an uncooled cylinder, the butt end of the isolator is placed in the same plane with the cathode butt end, right up to the isolator butt end, coaxially with the cathode, there is a washer, which inner diameter is mode than the cathode diameter and right up to the washer there is a flat metal anode with an opening coaxial to the washer thus forming a channel for an electronic beam from the cathode butt end up to the generator output. Both in the first and second versions the cathode may be fixed in the isolator by adhesive bond far from the cathode working surface.
EFFECT: ensuring cooling of the cathode and isolator close to the beam output and reaching higher operating parameters such as gas pressure, voltage and power.
4 cl, 3 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to modification of polymer material surface. Control over polymer surface modification in low-temperature HV discharge plasma at lower pressures of the medium is performed by varying the discharge power. Here, discharge power is continuously measured, its current magnitude being used for calculation in real time of temperature field in discharge area. Modification termination time is defined automatically when polymer surface reaches the preset temperature (70°C for polyethylene).
EFFECT: reproducibility of the surface adhesive properties, i.e. interfacial angle and work of adhesion, as well as stable surface hydrophysics.
1 dwg, 3 tbl
FIELD: power industry.
SUBSTANCE: invention relates to the field of plasma engineering. A nozzle for a plasma burner cooled with liquid includes drilling of a nozzle for outlet of a plasma gas jet on the nozzle end, the first section, the outer surface of which has a cylindrical shape and the second section adjacent to it, to the nozzle end, the outer surface of which converges conically in the direction to the nozzle end; besides, a provision is made for at least one liquid supply groove and/or at least one liquid discharge groove and are continued through the second section in the outer surface of nozzle (4) in the direction towards the nozzle end, and with that, the liquid supply groove or at least one of the liquid supply grooves and/or a liquid discharge groove, or at least one of the liquid discharge grooves is also continued through some part of the first section, and in the first section there is at least one groove interconnected with the liquid supply groove or at least with one of the liquid supply grooves or with the liquid discharge groove or at least with one of the liquid discharge grooves.
EFFECT: reduction of nozzle overheating.
18 cl, 11 dwg
SUBSTANCE: design of the offered six-jet plasmatron includes plasma forming copper heads installed on dielectric boards, rigidly fixed to brackets with a possibility of movement along axes of heads perpendicular to tubular racks. Above them annularly the tubular chamber of argon feeding to the heads protecting electrodes from oxidation, and working gas distribution chamber are located. Above racks axially to the above mentioned chambers the chamber for supply of cooling water into sections of heads from the vertical channel of water supply and chamber for water dump into the channel, which are connected with the sections of heads with flexible hoses, are located. For water flow cooling a radiator is provisioned. The racks are located on the bench, between racks the branch pipe forming analysable gas stream or processed powder material is rigidly installed, and the cylinder providing the synchronism of change of angle of convergence of six heads by means of the system, comprising the board with installed mobile brackets, ensuring change of value of inter-electrode interval of plasma-forming heads.
EFFECT: possibility of complete monitoring of any gas flow during thermal processing of any powder materials of preset fractional composition using the plasma flow.
SUBSTANCE: invention relates to plasma engineering and can be used to heat different gases and as an igniter for a powdered-coal burner. A high-voltage power supply which continuously generates high-frequency alternating voltage is connected to a first conical electrode and a second cylindrical electrode which is divided into two - igniting and output cylinder. The second electrodes are mounted coaxially in a dielectric cylinder, which is the housing of the device, by two centring dielectric washers with openings which are parallel to the main axis of the device for allowing passage of air. The first conical electrode is mounted coaxially inside the igniting cylinder of the second electrode through a stream-forming dielectric washer. The stream-forming washer has openings at an angle to the main axis of the device for swirling the air stream passing through the washer.
EFFECT: high efficiency of the device and longer life of the working electrodes.
SUBSTANCE: present invention relates to plasma physics. In the disclosed device having "open magnetic barrier trap" type magnetic plasma confinement, the working volume is filled with plasma from the same initial isotope, wherein the nucleus of a second isotope is accelerated to energy of (110-700) keV and fed in dense beams which balance pressure of the obtained plasma from all sides. Accelerators are distributed along the working volume in groups, directed towards the region of convergence of beams for each group and are connected to power sources through devices which turn on each group of accelerators at a given instant of the working cycle. The arrangement and turning on of the groups of accelerators is coordinated to enable interaction of plasma streams from groups of accelerators turned on earlier, and with beams of accelerated nuclei in the regions of convergence of said beams of accelerated nuclei.
EFFECT: compensating for pressure of plasma streams along a magnetic field.
FIELD: process engineering.
SUBSTANCE: invention relates to plasma engineering, particularly, to design of magnetic unit of spraying system and can be used in planar magnetrons for vacuum plasma spraying of metal thin films on the surface of solid bodies. Magnetic unit comprises central cylindrical and outer ring magnets arranged coaxially with spacing at magnetic duct of magnetically soft material. Magnetic duct has circular ledge equal in height to magnets, said ledge allowing the central magnet locking. Ledge surface facing the central magnet can be conical.
EFFECT: better uniformity of magnetic field intensity, decreased dimensions.
3 cl, 3 dwg
FIELD: engines and pumps.
SUBSTANCE: plasma engine with closed electron drift comprises primary circular ionisation channel confined by structural elements from insulating materials and exposed at its outlet. At least one hollow cathode is connected with ionising gas feed line. Ring anode concentric with primary channel is spaced from its exposed end. Circular buffer chamber is arranged at primary channel inlet part, behind anode zone, its radial size exceeding that of the primary circular channel. Pipes to feed ionising gas are communicated in direction towards anode via circular distributor with zone different from that of anode.
EFFECT: higher thrust, simplified design, guaranteed operating cycle.
FIELD: process engineering.
SUBSTANCE: invention relates to plasma welding. Proposed device comprises long electrode holder with front surface at electrode point and bore made thereat on mid axis through electrode holder and emission inserts fitted in said bore to make emission insert emitting surface free. Note here that emitting surface is shifted backward relative to front surface of electrode holder while plasma torch electrode includes its seat and electrode holder. Note here that said seat has internal thread while electrode holder has external thread and solid ring in at groove at outer cylindrical surface. Note also electrode holder is screwed in electrode seat by outer and inner thread and sealed by solid groove. Claimed plasma torch incorporates abode described electrode.
EFFECT: longer life.
9 cl, 11 dwg
SUBSTANCE: destruction method of multicomponent products consisting of metal components with attached insulating elements includes induction of stress field exceeding the limit of their mechanical strength in result of powerful shock waves, which are originated from a discharge channel formed in water between electrodes installed in a case and connected to a high-voltage pulse generator; the method is featured by use of discharges with energy gradient of 0.8-0.9 J/mm in order to induce stress field exceeding the limit of their mechanical strength and by implementation of the above discharges on the boundary line of water and destructed insulating elements.
EFFECT: invention allows removal of undamaged metal components and reduction of power costs for destruction process.
1 dwg, 1 tbl
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to well and shaft drilling. Drilling of solid bodies by electric pulse discharges comprises destruction of said bodies by high-voltage electric discharges between HV and grounded electrodes by electric pulse drill tip. Descending flow of flushing electrically conducting fluid destructs solid bodies to form gas cavity nearby working area naked end of HV electrode. Drill tip comprises HV and grounded electrodes isolated by insulator furnished with openings for feed of flushing fluid. HV electrode is shaped to skirt while central grounded electrode is spring loaded. Said drill tip is equipped with second grounded electrode composed of ring arranged above HV electrode.
EFFECT: higher efficiency and ecological safety.
2 cl, 2 dwg, 4 tbl
SUBSTANCE: device comprises an electric motor, a reduction gear with a hollow shaft, a laser light source, a tool for drilling, a mechanism of reciprocating supply of the drilling tool, an optical fibre, a gas system, a fluid reservoir, a mixer, a liquid injection system into the mixer, a suction system, channels for cooling the optical fibre, for supplying a refrigerant into a digging face zone and for discharging the refrigerant and the sludge suctioned from the digging face zone. A gas flow is supplied to the mixer from the gas system for atomisation of fluid in it with formation of a gas-droplet mixture, supplied into the digging face zone. The drilling tool is made of a sequence of units in the form of core tubes. The final unit of the drilling tool includes a ribbed crown equipped with heat-resistant cutters at its end and side surfaces. The slave end of the initial unit of the drilling tool is connected to the hollow shaft of a cylindrical reduction gear connected to an electric motor. The tube inside which the optical fibre made of quartz is placed with a gap, is positioned coaxially and without a possibility of rotation inside the cavity of the cylindrical reduction gear and the core units. The annular gap between the fibre surface and the inner surface of the tube serves as a supply channel of the gas guard flow for cooling the optical fibre and protecting its radiative end against particles of a destructible material during laser and mechanical treatment of the digging face surface. The annular gap between the outer surface of the tube and the inner surface of the core units serves as a channel for supplying the refrigerant into the digging face zone. The annular gap between the outer surface of core units and the hole surface in the material serves as a discharge channel of the refrigerant and sludge suctioned from the digging face zone.
EFFECT: improvement of production capacity for drilling holes.
2 cl, 5 dwg
SUBSTANCE: laser radiation is fed to bore face is delivered via quartz optical 0.2-1 mm dia fibre. Optical fibre is locked in pipe along the drilling tool inner space axis. Note here that radiating end of optical finer is spaced from ribbed bit cutters end surface for h≤d0/[2tg(arcsinNA)], where d0 is ribbed bit cavity diameter, NA is optical fibre numerical aperture. Protective gas flow is forced in circular gap between optical finer surface and pipe inner surface towards the face. Said face is irradiated with laser beam with radiation sport at face surface of diameter smaller than that of ribbed bit OD by (0.6÷2)Δ, where Δ=(20÷35)/q is depth of thermally weakened material layer (cm), q=P(l-R)(l-ρ) is absorbed laser radiation density (W/cm2), P is power density of incident laser radiation (W/cm2), R is the factor of reflection from material surface, ρ is heat loses from radiation from heated material. For this, prior to irradiation drill tool end surface is set at L=[D-d0-(0.6÷2)Δ]/[2tg(arcsinNA)] from face surface, where D is ribbed bit OD. Drilling is conducted in intermittent manner. In every cycle, face surface is irradiated for t=(45000÷130000)/q2 (s), for face surface heating to material fusion and boiling temperature. Then, face surface is cooled by coolant for 1-15 s at heat exchange factor of 300÷5000 W/m2·deg. Then, drill tool is displaced towards the face till the contact therewith by ribbed bit end cutters. Lengthwise forces are applied to mechanically crush said thermally weakened material to depth Δ with simultaneous forced removal of slime from face zone. Thereafter drill toll is shifted from face surface for distance L. Drill cycles are reiterated unless preset bore depth is reached.
EFFECT: higher efficiency of drilling.
5 cl, 7 dwg
SUBSTANCE: to drill holes in concrete buildings for the purpose to strengthen them with braces and in dangerous vertical sections of the rock, to drill thin diagnostic deep holes in multi-metre concrete walls of burial grounds with buried radioactive substances, for drilling of local side holes in the wall of the well, drilling in surrounding rock is carried out cyclically. In each cycle of drilling the hole bottom is exposed to serial alternation of thermal and mechanical actions, namely, in the following sequence: laser radiation, cooling by coolant, mechanical grinding of a layer of weakened material on it and forced removal of sludge from the bottomhole area, afterwards the cycles of drilling are repeated to achieve the specified depth of the hole.
EFFECT: increased efficiency of hole drilling.
3 cl, 4 dwg
SUBSTANCE: electrodischarge destruction method of solid materials involves formation of a bore pit in solid material, arrangement in it of a cartridge containing a substance that transmits an air blast and a blasting conductor, and initiation of a discharge with the blasting conductor. Cartridges are made from plastic material with acoustic stiffness close to acoustic stiffness of destructible material. Blasting conductor is pressed into cartridge material. Polyethylene or plasticine is used as plastic material.
EFFECT: improving destruction efficiency of mine rock and utilisation of concrete and reinforced-concrete units and structures.
3 cl, 1 tbl, 3 dwg
SUBSTANCE: hydraulic current lead (1), drill stem (2) and drill head including housing (6), high-voltage and earthed electrodes (7 and 8) and high-voltage insulator (9) are connected in series in the assembly. Inside drill stem (2) there coaxially fixed is axial current lead (5), on which central pipe (10) is freely put and provided with charging device (14) and high-voltage pulse (15) source, which are fixed on the above central pipe. Shock absorbing spring (12) is installed under high-voltage pulse (15) source in casing (13) freely put on central pipe (10). One or more bottom-hole posts (11) are attached to lower end of central pipe (10) and have the possibility of longitudinal movement till they come out of the drill head by more than 1/3 of inter-electrode distance.
EFFECT: period of trouble-free operation of a charging device and a high-voltage pulse source is increased by several times.
3 cl, 3 dwg, 1 ex
SUBSTANCE: device to cut rock slabs by high-voltage discharges has a tubular channel for supply of washing fluid into a gap between high-voltage and grounded electrodes made in the form of parallel plates separated with an insulator. The high-voltage and grounded electrodes are arranged horizontally, and on top to one of ends of the upper electrode there is a pipe fixed for rotation and displacement of the device, and in the gap between electrodes there is an above-bottomhole dielectric pipe, made with washing windows facing towards the near-bottomhole parts of electrodes. Inside the pipe of rotation and displacement there is a high-voltage pipe installed coaxially and separated with an intertubular insulator. The high-voltage and grounded electrodes are equipped with near-bottomhole electrode ribs of different shape.
EFFECT: device makes it possible to cut rock slabs from a narrow vertical slot to form a lengthy cut slot, besides, the cutting process may be continuous.
6 cl, 6 dwg
SUBSTANCE: electromagnet pulse mechanism comprises a body of a ferromagnetic material, an anchor with rings from a non-magnetic current-conducting material, an induction coil, rear and front covers and a source of pulse current. The anchor is made of two hollow parts of identical length that are symmetrically arranged relative to the induction coil, between which there is a fixed ferromagnetic core, each part of the anchor comprises a ferromagnetic base and a non-magnet current-conducting ring placed on it. Such design of the anchor in the pulse mechanism provides for simultaneous power effect at its both parts and accordingly compensation of reaction forces acting at the coil and the body.
EFFECT: invention makes it possible to reduce vibration effect at a machine body at the side of a coil and to increase mechanism reliability.
SUBSTANCE: submerged-type electric pulse drill is intended for drilling of wells and driving of shafts in hard mine rocks destructed with high-voltage discharges developed in them, and can be used in mining industry. Drill head (6) is attached to lower flange of drill (2) housing. In drill (2) housing there coaxially installed is washing pipeline (1) that is passed through the drill cover plate (3) and high-voltage insulator (5) provided with insulation ribs (8), which are inclined towards drill head (6), which provides collection of impurities in annular sump tank (9) and their removal from the drill through discharge valve (10) by increasing the gas pressure in it, thus multiply increasing the service life of insulation elements of the drill. It is facilitated with the diameter of lower high-voltage insulator (5) exceeding its support rib (7) in comparison to inner diameter of mounting flange (11). In order to increase the drill service life and reduce the time required for its maintenance, high-voltage pulse source is made as per Arkadyev-Marx scheme, capacitors (17) of which are arranged around washing pipeline (1) and assembled to detachable capacitor sections, each of which includes one or more capacitors (17), two buses (19), two charge elements and support insulator (20).
EFFECT: invention allows increasing the service life of the device, simplifying its maintenance, and removing and re-installing individual detachable parts without complete removal of the generator.
3 cl, 3 dwg
FIELD: well drilling equipment, particularly to drill bores and wells, as well as rock and artificial non-conductive material cutting.
SUBSTANCE: drill comprises body, drilling bit provided with high-voltage current conductor and electrode secured in longitudinal slots thereof by means of insulator. Drilling bit has movable electrode, which projects from drilling bit end and movable electrode travel limiter. Drill body is connected with rotary unit through torque-limiting clutch.
EFFECT: increased efficiency of rock cutting due to increased number of electric discharges, which have been introduced in rock to be cut.
5 cl, 8 dwg