Shock wave generator and output power adjusting method thereof

Abstract

The invention discloses a shock wave generator and an output power adjusting method thereof. The shock wave generator comprises an energy converter, a high-voltage electrode, a low-voltage electrode and a metal wire. The energy converter is provided with a window for shock waves to pass through, a high-voltage electrode and a low-voltage electrode are arranged on the two sides of the window in the energy converter respectively, the metal wire is arranged in the window, and the two ends of the metal wire are connected to the high-voltage electrode and the low-voltage electrode respectively. The metal wire is of a tubular structure. The method comprises the following steps that a metal wire of a tubular structure is adopted, the resistance R of the metal wire is adjusted by changing the sectional area of the metal wire, and then the output power of the shock wave generator is adjusted. The problem that in the prior art, a new metal wire is supplemented through a wire feeding mechanism, the metal wire occasionally deforms, the axis deviation phenomenon occurs, and consequently the tail end of the metal wire cannot be accurately aligned, and a stable contact interface is formed between the metal wire and a high-voltage electrode is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of metal wire electric explosion, and specifically relates to a shock wave generator and an output power regulation method thereof. Background Art

[0002] A metal wire is set between the high-voltage electrode and the low-voltage electrode of the energy converter of the shock wave generator. The high-voltage electrode and the low-voltage electrode are short-circuited to discharge the metal wire, and a pulse current of a certain parameter is injected into the metal wire. Under the action of Joule heating, the metal wire undergoes a rapid phase change, successively experiencing solid, liquid, gas and plasma states, and finally develops into a plasma channel. Under the action of the subsequent discharge current, the plasma arc resistor heats the surrounding water medium by the Joule heating principle to make it vaporize and expand rapidly, accompanied by physical phenomena such as light radiation and shock waves. The resistance of the metal wire in the phase change process changes nonlinearly. Using different materials and structures of metal wires can increase the initial resistance of the metal, increase the ratio of the metal wire resistance to the conduction resistance and contact resistance of the discharge circuit, so as to improve the energy conversion efficiency, reduce the energy deposited on the conduction resistance and contact resistance, and damage to the equipment. After the shock wave generated by the energy converter manufactured by the principle of metal wire electric explosion acts on targets such as coal seams, rock strata, and stones, it can crack the coal seams and rock strata, or break the stones. The shock waves generated by the energy converter are highly controllable and have good fracturing effects. Therefore, the energy converter is expected to replace traditional fracturing methods such as hydraulic fracturing and gunpowder fracturing.

[0003] After the metal wire explodes, in order to ensure that the shock wave generator can operate repeatedly, new metal wire must be added in time. Currently, the new metal wire is pushed between the high-voltage electrode and the low-voltage electrode by a wire feeding mechanism. However, in the actual pushing process, the metal wire occasionally deforms and the axis deviates, resulting in the inability to accurately align its end and form a stable contact interface with the high-voltage electrode. This deviation affects the normal operation of the shock wave generator. Summary of the invention

[0004] The embodiment of the present application provides a shock wave generator and an output power adjustment method thereof, thereby solving the problem in the prior art that when a new metal wire is added through a wire feeding mechanism, the metal wire may occasionally deform and have an axial deviation, resulting in the inability to accurately align the end of the metal wire and form a stable contact interface with the high-voltage electrode.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a shock wave generator, including an energy converter, a high-voltage electrode, a low-voltage electrode and a metal wire;

[0006] The energy converter is provided with a window for the shock wave to pass through, the high-voltage electrode and the low-voltage electrode are respectively provided on both sides of the window in the energy converter, the metal wire is provided in the window, and the two ends of the metal wire are respectively connected to the high-voltage electrode and the low-voltage electrode;

[0007] The metal wire is a tubular structure.

[0008] In a possible implementation manner, a groove is provided on a side wall of the metal wire.

[0009] The embodiment of the present invention further provides a method for adjusting the output power of a shock wave generator, using the above-mentioned shock wave generator, comprising the following steps:

[0010] A tubular metal wire is used, and the resistance R of the metal wire is adjusted by changing the cross-sectional area of ​​the metal wire, thereby adjusting the output power of the shock wave generator;

[0011] Resistance of the wire Wherein, L is the length of the metal wire, r1 is the outer diameter of the metal wire, r2 is the inner diameter of the metal wire, and k is the resistivity of the material used for the metal wire.

[0012] In a possible implementation, by increasing the wall thickness of the metal wire and providing a groove on the outer wall of the metal wire, the resistance value and mass of the metal wire are maintained within a set range, thereby maintaining the output power of the shock wave generator within a set range.

[0013] In a possible implementation, a groove is provided on the outer wall of the metal wire, the length of the groove is S, and the cross-sectional area of ​​the groove is n;

[0014] The resistance of the metal wire is R = R1 + R2;

[0015] Resistance of the metal wire with slotted sections

[0016] Resistance of the metal wire without slot section

[0017] In a possible implementation, a group of slots are evenly opened along the length direction of the metal wire, and each group of slots includes b slots evenly distributed on the outer wall of the metal wire;

[0018] Therefore, the resistance of the metal wire in the slot section is

[0019] Resistance of the metal wire without slot section

[0020] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0021] The embodiment of the present invention provides a shock wave generator and an output power adjustment method thereof. The present invention manufactures the metal wire into a tubular structure, which can improve the structural strength of the metal wire in the axial direction, thereby preventing the metal wire from being deformed and axially offset when being pushed, so that the end of the metal wire is accurately aligned and forms a stable contact interface with the high-voltage electrode to enable the shock wave generator to work normally. The metal wire structure of the shock wave generator of the present invention is simple, practical, and easy to promote and use. The output power of the shock wave generator is directly proportional to the resistance of the metal wire. Therefore, by changing the cross-sectional area of ​​the metal wire, the resistance of the metal wire can be adjusted, and then the output power of the shock wave generator can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a shock wave generator provided in an embodiment of the present invention.

[0024] Figure 2 A schematic diagram of the structure of a metal wire provided in an embodiment of the present invention.

[0025] Figure 3 A cross-sectional view of a metal wire at a slot body provided in an embodiment of the present invention.

[0026] Figure numerals: 1 - energy converter; 11 - window; 2 - high voltage electrode; 3 - low voltage electrode; 4 - metal wire; 41 - slot body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0029] like Figures 1 to 3 As shown, the shock wave generator provided by the embodiment of the present invention includes an energy converter 1, a high voltage electrode 2, a low voltage electrode 3 and a metal wire 4.

[0030] The energy converter 1 is provided with a window 11 for shock waves to pass through. A high voltage electrode 2 and a low voltage electrode 3 are respectively provided on both sides of the window 11 in the energy converter 1. A metal wire 4 is provided in the window 11, and both ends of the metal wire 4 are respectively connected to the high voltage electrode 2 and the low voltage electrode 3.

[0031] The metal wire 4 is a tubular structure.

[0032] It should be noted that the metal wire 4 of the prior art is a filamentary structure, so the axial structural strength is poor, so that during the pushing process of the metal wire 4, the metal wire 4 will be deformed and the axis will be offset. After deducing this reason, improving the axial structural strength of the metal wire 4 is the way to solve this technical problem. We found in the experiment that making the metal wire 4 into a tubular structure can improve the axial structural strength of the metal wire 4, thereby preventing the metal wire 4 from being deformed and the axis from being offset during pushing, so that the end of the metal wire 4 is accurately aligned and forms a stable contact interface with the high-voltage electrode 2, so that the shock wave generator can work normally. The metal wire 4 of the shock wave generator of the present invention has a simple structure, strong practicality, and is easy to promote and use.

[0033] In this embodiment, a groove 41 is provided on the side wall of the metal wire 4 .

[0034] It should be noted that the groove body 41 is a groove provided on the outer wall of the metal wire 4, or a hole provided on the side wall of the metal wire 4. By providing the groove body 41, the metal wire 4 can have a thicker side wall under the condition that the quality and resistance of the metal wire 4 are consistent, thereby further improving the axial structural strength of the metal wire 4 and ensuring the output power of the shock wave generator.

[0035] like Figures 1 to 3 As shown, an output power adjustment method of a shock wave generator provided by an embodiment of the present invention adopts the above-mentioned shock wave generator and includes the following steps:

[0036] The metal wire 4 with a tubular structure is used, and the resistance R of the metal wire 4 is adjusted by changing the cross-sectional area of ​​the metal wire 4, thereby adjusting the output power of the shock wave generator.

[0037] Resistance of wire 4 Wherein, L is the length of the metal wire 4 , r1 is the outer diameter of the metal wire 4 , r2 is the inner diameter of the metal wire 4 , and k is the resistivity of the material used for the metal wire 4 .

[0038] It should be noted that the cross-sectional area of ​​the metal wire 4 is The mass of the metal wire 4 is ρ is the density of the material used for the metal wire 4. The output power of the shock wave generator is directly proportional to the resistance of the metal wire 4. Therefore, by changing the cross-sectional area of ​​the metal wire 4, the resistance of the metal wire 4 can be adjusted, thereby adjusting the output power of the shock wave generator.

[0039] In this embodiment, by increasing the wall thickness of the metal wire 4 and providing a groove 41 on the outer wall of the metal wire 4, the resistance value and mass of the metal wire 4 are kept within a set range, thereby keeping the output power of the shock wave generator within a set range.

[0040] It should be noted that by providing the groove body 41, the metal wire 4 can have a thicker side wall while maintaining the quality and resistance of the metal wire 4 and the output power of the shock wave generator consistent, thereby further improving the axial structural strength of the metal wire 4 and ensuring the output power of the shock wave generator.

[0041] In this embodiment, a groove 41 is formed on the outer wall of the metal wire 4 . The length of the groove 41 is S, and the cross-sectional area of ​​the groove 41 is n.

[0042] The resistance of the metal wire 4 is R=R1+R2.

[0043] The resistance of the metal wire 4 in the slot section

[0044] The resistance of the metal wire 4 without the slot section

[0045] It should be noted that the mass of the metal wire 4 is M = M1 + M2, and the mass of the metal wire 4 with the slot section is The quality of the metal wire 4 without the slot section It can be concluded from the above formula that the tubular metal wire 4 is easier to adjust the relationship between resistance and mass, so as to ensure the axial structural strength of the metal wire 4 while adjusting the output power of the shock wave generator, thereby avoiding the problem that the output power of the shock wave generator cannot be adjusted when using a filamentary metal wire 4 and improving the structural strength by increasing the diameter.

[0046] In this embodiment, a groups of slots 41 are evenly arranged along the length direction of the metal wire 4 , and each group of slots 41 includes b slots 41 evenly distributed on the outer wall of the metal wire 4 .

[0047] Therefore, the resistance of the metal wire 4 in the slot section is

[0048] The resistance of the metal wire 4 without the slot section

[0049] It should be noted that when the metal wire 4 is processed, there are multiple grooves 41, and the multiple grooves 41 are evenly distributed on the side wall of the metal wire 4. Such processing can make the metal wire 4 more uniform as a whole, thereby forming a uniform plasma channel and ensuring the effect of the shock wave operation.

[0050] In this embodiment, it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A shock wave generator, characterized in that: It comprises an energy converter (1), a high voltage electrode (2), a low voltage electrode (3) and a metal wire (4); The energy converter (1) is provided with a window (11) for the shock wave to pass through, the high-voltage electrode (2) and the low-voltage electrode (3) are respectively provided on both sides of the window (11) in the energy converter (1), the metal wire (4) is provided in the window (11), and the two ends of the metal wire (4) are respectively connected to the high-voltage electrode (2) and the low-voltage electrode (3); The metal wire (4) is a tubular structure.

2. The shock wave generator according to claim 1, characterized in that: A groove body (41) is provided on the side wall of the metal wire (4).

3. A method for adjusting the output power of a shock wave generator, characterized in that: Using the shock wave generator as claimed in any one of claims 1 to 2, comprising the following steps: A metal wire (4) with a tubular structure is used, and the resistance R of the metal wire (4) is adjusted by changing the cross-sectional area of ​​the metal wire (4), thereby adjusting the output power of the shock wave generator; Resistance of the metal wire (4) Wherein, L is the length of the metal wire (4), r1 is the outer diameter of the metal wire (4), r2 is the inner diameter of the metal wire (4), and k is the resistivity of the material used for the metal wire (4).

4. The method for adjusting the output power of a shock wave generator according to claim 3, characterized in that: By increasing the wall thickness of the metal wire (4) and providing a groove (41) on the outer wall of the metal wire (4), the resistance value and the mass of the metal wire (4) are kept within a set range, thereby keeping the output power of the shock wave generator within a set range.

5. The method for adjusting the output power of a shock wave generator according to claim 4, characterized in that: A groove body (41) is provided on the outer wall of the metal wire (4), the length of the groove body (41) is S, and the cross-sectional area of ​​the groove body (41) is n; The resistance of the metal wire (4) is R=R1+R2; The resistance of the metal wire (4) in the slot section The resistance of the metal wire (4) without the slot section 6. The method for adjusting the output power of a shock wave generator according to claim 5, characterized in that: A group of slot bodies (41) are evenly arranged along the length direction of the metal wire (4), and each group of slot bodies (41) includes b slot bodies (41) evenly distributed on the outer wall of the metal wire (4); Therefore, the resistance of the metal wire (4) in the slot section is The resistance of the metal wire (4) without the slot section

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