Underwater DC arc control device

Abstract

A DC arc control device for underwater is disclosed. In the device, the arc-extinguishing hood has an internal cavity for accommodating a liquid arc-extinguishing medium. The arc-extinguishing hood has a threaded hole penetrating into the internal cavity, and the side wall of the internal cavity has a track groove. A supporting insulating block is disposed in the internal cavity and has a groove. A pair of replaceable inlet and outlet electrodes are inserted into the internal cavity. The replaceable inlet and outlet electrodes have an L-shaped structure, which includes a vertical section with a first length and a horizontal section extending horizontally from the top of the vertical section. Quartz glass is placed above the supporting insulating block. An upper flange cover is sealed to the arc-extinguishing hood, and the bottom of the upper flange cover is attached to the quartz glass. A magnetic blow-out coil is coaxially fixed above the upper flange cover.

Description

Technical Field

[0001] This invention relates to the field of underwater DC arc control, and in particular to an underwater DC arc control device. Background Technology

[0002] Underwater DC arc discharge has been studied in many fields. Currently, the difficulty in observing underwater arcs and their high degree of randomness limit their further application. To address these challenges, this invention proposes an underwater arc control device. By adjusting the electrode structure and applying external magnetic blow, the device can observe the directional and rapid development of the underwater arc, reducing the randomness of arc movement and achieving arc elongation and arc voltage increase in a short time.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention

[0004] To address the shortcomings or defects of the existing technology, an underwater DC arc control device is provided. By improving the structure of the output electrode and adopting an external magnetic blowout method, the short arc formed between the electrodes can be clearly observed to rapidly elongate along a set development direction, driving the arc voltage to rise rapidly, thereby improving the arc extinguishing capability of the device. This device can control the development trend of the underwater arc and is easy to observe. The objective of this invention is achieved through the following technical solution.

[0005] The underwater DC arc control device includes,

[0006] An arc-extinguishing hood has an internal cavity for containing a liquid arc-extinguishing medium. The arc-extinguishing hood is provided with a threaded hole that penetrates into the internal cavity, and the sidewall of the internal cavity is provided with a track groove.

[0007] A supporting insulating block is disposed in the internal cavity, and the supporting insulating block is provided with a groove;

[0008] A pair of replaceable inlet and outlet electrodes are inserted into the internal cavity. The replaceable inlet and outlet electrodes are of an L-shaped structure, which includes a vertical section having a first length and a horizontal section extending horizontally from the top of the vertical section. The horizontal section has a second length. The vertical section is inserted into the internal cavity along the track groove. The horizontal section is adapted to fit into the groove. The vertical section is detachably fixed by a screw passing through the threaded hole.

[0009] Quartz glass, which is placed above the supporting insulating block;

[0010] The upper flange cover is sealed to the arc-extinguishing cover, and the bottom of the upper flange cover is attached to the quartz glass.

[0011] The magnetic blow-out coil is coaxially fixed directly above the upper flange cover.

[0012] In the aforementioned underwater DC arc control device, a pair of replaceable inlet and outlet electrodes are connected by copper wire for arc initiation, and the replaceable inlet and outlet electrodes are made of copper.

[0013] In the aforementioned underwater DC arc control device, the magnetic blow-out coil is coaxially fixed above the upper flange cover via insulating adhesive, and the surface of the magnetic blow-out coil is wrapped with an insulating layer.

[0014] In the aforementioned underwater DC arc control device, the lower surface of the quartz glass is bonded to a pair of replaceable inlet and outlet electrodes.

[0015] In the aforementioned underwater DC arc control device, the first length is greater than the second length.

[0016] In the aforementioned underwater DC arc control device, the arc-extinguishing hood is made of insulating epoxy resin material, and the liquid arc-extinguishing medium is pure water.

[0017] In the aforementioned underwater DC arc control device, the upper flange cover is provided with a radial sealing groove and an axial sealing groove to seal the arc extinguishing cover, and the radial sealing groove and the axial sealing groove are respectively provided with nitrile sealing rings.

[0018] In the aforementioned underwater DC arc control device, the lower surface of the quartz glass is spaced at a predetermined gap from the pair of replaceable inlet and outlet electrodes.

[0019] In the aforementioned underwater DC arc control device, the predetermined gap is 1 mm.

[0020] In the aforementioned underwater DC arc control device, the end of the horizontal section is either beveled or rounded.

[0021] Beneficial effects

[0022] By improving the structure of the lead-out electrode and adopting an external magnetic blowout method, this invention can clearly observe that the short arc formed between the electrodes elongates rapidly along a set development direction, thereby driving the arc voltage to rise rapidly and improving the arc extinguishing capability of the device.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0024] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0025] In the attached diagram:

[0026] Figure 1 This is a front view schematic diagram of an embodiment of the underwater DC arc control device of the present invention;

[0027] Figure 2 This is a top view of an embodiment of the underwater DC arc control device of the present invention, with the arc-extinguishing cover, upper flange cover, and magnetic blow-out coil concealed.

[0028] Figure 3 This is a schematic diagram of the magnetic field distribution and arc motion under externally controlled magnetic blowout conditions in an embodiment of the underwater DC arc control device of the present invention.

[0029] Figure 4 This is a schematic diagram of the magnetic field distribution and arc motion under externally controlled magnetic blowout conditions in an embodiment of the underwater DC arc control device of the present invention.

[0030] Figure 5 This is a schematic diagram of the arc movement after regulating the inlet and outlet electrode structures of another embodiment of the underwater DC arc control device of the present invention.

[0031] Figure 6 This is a top view schematic diagram of another embodiment of the underwater DC arc control device of the present invention. Detailed Implementation

[0032] The following will refer to the appendix. Figures 1 to 6 Specific embodiments of the invention will be described in more detail below. While specific embodiments of the invention are shown in the accompanying drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0033] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out the invention; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0034] To facilitate understanding of the embodiments of the present invention, the following will provide further explanation and description with reference to the accompanying drawings and several specific embodiments, and the accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0035] like Figures 1 to 4 As shown, the underwater DC arc control device includes,

[0036] The arc-extinguishing cover 5 has an internal cavity for containing liquid arc-extinguishing medium. The arc-extinguishing cover 5 is provided with a threaded hole that penetrates into the internal cavity, and the side wall of the internal cavity is provided with a track groove.

[0037] A supporting insulating block 2 is disposed in the internal cavity, and the supporting insulating block 2 is provided with a groove;

[0038] A pair of replaceable inlet / outlet electrodes 3 are inserted into the internal cavity. The replaceable inlet / outlet electrodes 3 have an L-shaped structure, which includes a vertical section with a first length and a horizontal section extending horizontally from the top of the vertical section. The horizontal section has a second length. The vertical section is inserted into the internal cavity along the track groove. The horizontal section is adapted to fit into the groove. The vertical section is detachably fixed by a screw passing through the threaded hole.

[0039] Quartz glass 1 is placed above the supporting insulating block 2;

[0040] The upper flange cover 6 is sealed to the arc-extinguishing cover 5, and the bottom of the upper flange cover 6 is attached to the quartz glass 1;

[0041] The magnetic blow-out coil 4 is coaxially fixed above the upper flange cover 6.

[0042] In a preferred embodiment of the underwater DC arc control device, a pair of replaceable inlet and outlet electrodes 3 are connected by copper wire for arc initiation, and the replaceable inlet and outlet electrodes 3 are made of copper.

[0043] In a preferred embodiment of the underwater DC arc control device, the magnetic blow-out coil 4 is coaxially fixed above the upper flange cover 6 via insulating adhesive, and the surface of the magnetic blow-out coil 4 is wrapped with an insulating layer.

[0044] In a preferred embodiment of the underwater DC arc control device, the lower surface of the quartz glass 1 is attached to a pair of replaceable inlet and outlet electrodes 3.

[0045] In a preferred embodiment of the underwater DC arc control device, the first length is greater than the second length.

[0046] In a preferred embodiment of the underwater DC arc control device, the arc extinguishing cover 5 is made of insulating epoxy resin material, and the liquid arc extinguishing medium is pure water.

[0047] In a preferred embodiment of the underwater DC arc control device, the upper flange cover 6 is provided with a radial sealing groove and an axial sealing groove to seal the arc extinguishing cover 5, and the radial sealing groove and the axial sealing groove are respectively provided with nitrile sealing rings.

[0048] In a preferred embodiment of the underwater DC arc control device, the lower surface of the quartz glass 1 is spaced apart from the pair of replaceable inlet and outlet electrodes 3 by a predetermined gap.

[0049] In a preferred embodiment of the underwater DC arc control device, the predetermined gap is 1 mm.

[0050] In a preferred embodiment of the underwater DC arc control device, the end of the horizontal section is either beveled or rounded.

[0051] In one embodiment, the insulating support block is placed inside the arc-extinguishing chamber 5; one end of the replaceable inlet / outlet electrode 3 contacts the supporting insulating block 2, and threaded holes are symmetrically opened on both sides of the arc-extinguishing chamber 5. Screws are used to fix the other end of the replaceable arc-initiating electrode on each side, and copper wire is used to initiate the arc between the inlet / outlet electrodes 3. The magnetic blow-out coil 4 is fixed to the top of the upper cover using insulating adhesive. The quartz glass 1 for observation is placed on top of the arc-extinguishing chamber 5, and the lower surface of the quartz glass 1 is tightly fitted to the inlet / outlet electrodes 3. The upper cover is tightly fastened and sealed to the arc-extinguishing chamber 5 using screws. The outer shell of the arc-extinguishing chamber 5 is made of insulating epoxy resin material, with sealing holes and grooves inside. The arc-extinguishing medium is pure water. The replaceable inlet / outlet electrode 3 is made of copper, with a basic L-shaped structure. The longer end is straight and fixed to the inner wall of the arc-extinguishing chamber 5 with screws; the shorter end is entirely fitted to the surface of the supporting insulating block 2, and its size and shape can be changed. Small grooves are cut on both sides of the upper surface of the supporting insulating block 2 to limit the shorter ends of the electrodes. The surface of the magnetic blowout coil 4 is covered with an insulating layer.

[0052] In one embodiment, the supporting insulating block 2 is inserted into the internal cavity of the arc-extinguishing chamber 5 from the middle. The replaceable inlet / outlet electrode 3 has an L-shaped basic structure, with its longer end being L-shaped. It is inserted into the cavity along the track grooves on both sides of the arc-extinguishing chamber 5. Threaded holes are opened symmetrically on both sides of the arc-extinguishing chamber 5. Screws are used to fix the longer end of the replaceable inlet / outlet electrode, and the shorter end fits into the two grooves on the left and right sides of the supporting insulating block 2. The quartz glass 1 is placed on top of the supporting insulating block 2. Radial sealing and axial sealing grooves are opened on both sides and the bottom of the upper flange cover to seal the liquid inside the arc-extinguishing chamber. Screws are used to tightly fit the upper flange cover 6 with the quartz glass 1, thereby simultaneously fixing the supporting insulating block 2 and the replaceable inlet / outlet electrode 3. The magnetic blow-out coil 4 is wrapped with an insulating layer and coaxially fixed above the flange cover 6.

[0053] In this embodiment, copper wire welding is used between the replaceable input and output electrodes 3 to maintain the initial electrical connection. A 1mm gap is left between the quartz glass 1 and the replaceable input and output electrodes 3 to limit the depth of the moving arc. The upper and lower ends of the supporting insulating block 2 have protrusions to prevent the arc from moving deeper into the interior after leaving the electrode center, which would be detrimental to observation. Overall, this helps to control the arc generated by the discharge to only reach the inner part of the electrode. Figure 2 The motion in the top-view plane is shown. By controlling the length of the shorter end of the replaceable inlet and outlet electrodes 3, the gap between the electrodes can be adjusted, and the arc morphology development under different electrode gap conditions can be observed without changing other structures.

[0054] like Figure 3 The diagram illustrates the magnetic field distribution and arc motion under externally controlled magnetic blowout conditions. Solid arrows indicate the direction of current, dashed arrows indicate the direction of force on the arc, and the dashed line indicates the direction of the applied magnetic field. When the replaceable inlet / outlet electrode 3 and the upper magnetic blowout coil 4 are energized, the copper wire between the electrodes melts, forming an arc. The magnetic blowout coil 4 generates a strong, vertically downward magnetic field. The arc moves downward under the influence of this magnetic force, and the arc column can be observed to elongate uniformly, with the arc voltage rising rapidly. When the arc reaches a sufficient length, the arc voltage significantly exceeds the power supply voltage, the inter-electrode current is interrupted, and the arc self-extinguishes.

[0055] like Figure 4 The diagram illustrates the arc movement after adjusting the replaceable input / output electrodes 3. The shorter ends of the input / output electrodes are modified into a beveled shape, and the distance between the electrodes gradually increases downwards, forming an arc path. When energized, the copper wire between the electrodes melts, generating an arc. Under the influence of a self-excited magnetic field, the arc moves downwards along the arc path. The arc can be observed to rapidly elongate and its voltage increases rapidly. When the arc reaches a sufficient length, the arc voltage significantly exceeds the power supply voltage, the current between the electrodes is interrupted, and the arc self-extinguishes.

[0056] like Figure 5 The diagram shows another method for controlling the arc movement after replacing the input / output electrodes 3. The structure at the ends of the input / output electrodes is changed to a rounded shape. When energized, the inter-electrode fuse melts, generating an arc. Under the action of a self-excited magnetic field or an external magnetic field, the arc is subjected to a downward Lorentz force. The rounded shape reduces the dwell time of the arc root at the endpoint, allowing the arc root to move rapidly to the desired position. Figure 5 The location shown facilitates a rapid increase in arc length and a rapid rise in arc voltage. When the arc reaches a sufficient length, the arc voltage significantly exceeds the power supply voltage, the inter-electrode current is interrupted, and the arc self-extinguishes.

[0057] This invention provides another underwater DC arc control device, such as... Figure 6 As shown, the control device includes a magnetic blow-out coil 1, an electrode insulating flange 8 with supporting insulating protrusions, a replaceable inlet / outlet electrode 3 which is cylindrical, and an arc-extinguishing cover 7 which is an outer shell.

[0058] In this device, the outer casing 7 is a horizontally placed cylindrical cavity filled with liquid. The magnetic blow-out coil 1 is wrapped with an insulating layer and coaxially fixed to the two circular surfaces of the outer casing 7. The replaceable inlet / outlet electrodes 3 are fixed to the electrode insulating flange 8 through coaxial screw holes. Radial and axial sealing measures are provided at the contact point between the electrode insulating flange 8 and the outer casing 7. The inner cavity wall of the outer casing 7 is lined with an insulating protective layer to resist arc erosion. The replaceable inlet / outlet electrodes 3 are connected to an external electromagnetic drive mechanism to realize the opening and closing function.

[0059] Furthermore, by applying a pre-set static pressure to the two types of cavities described above, the same effect of increasing the arc voltage level can be achieved.

[0060] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art can make many other forms based on the guidance of this specification and without departing from the scope of protection of the claims of the present invention, and all of these are within the scope of protection of the present invention.

Claims

1. A DC arc control device for underwater applications, characterized in that: It includes, An arc-extinguishing hood has an internal cavity for containing a liquid arc-extinguishing medium. The arc-extinguishing hood is provided with a threaded hole that penetrates into the internal cavity, and the sidewall of the internal cavity is provided with a track groove. A supporting insulating block is disposed in the internal cavity, and the supporting insulating block is provided with a groove; A pair of replaceable inlet and outlet electrodes are inserted into the internal cavity. The replaceable inlet and outlet electrodes are of an L-shaped structure, which includes a vertical section having a first length and a horizontal section extending horizontally from the top of the vertical section. The horizontal section has a second length. The vertical section is inserted into the internal cavity along the track groove. The horizontal section is adapted to fit into the groove. The vertical section is detachably fixed by a screw passing through the threaded hole. Quartz glass, which is placed above the supporting insulating block; The upper flange cover is sealed to the arc-extinguishing cover, and the bottom of the upper flange cover is attached to the quartz glass. The magnetic blowout coil is coaxially fixed above the upper flange cover. The arc extinguishing cover is made of insulating epoxy resin material. The liquid arc extinguishing medium is pure water. The lower surface of the quartz glass is spaced at a predetermined gap from the pair of replaceable inlet and outlet electrodes. The upper and lower ends of the supporting insulating block are provided with protruding parts to prevent the arc from moving deeper into the interior after leaving the center of the electrode.

2. The underwater DC arc control device according to claim 1, characterized in that: A copper wire is used to ignite an arc between a pair of replaceable inlet and outlet electrodes, which are made of copper.

3. The underwater DC arc control device according to claim 1, characterized in that: The magnetic blow-out coil is coaxially fixed above the upper flange cover via insulating adhesive, and the surface of the magnetic blow-out coil is covered with an insulating layer.

4. The underwater DC arc control device according to claim 1, characterized in that: The lower surface of the quartz glass is bonded to a pair of replaceable inlet and outlet electrodes.

5. The underwater DC arc control device according to claim 1, characterized in that: The first length is greater than the second length.

6. The underwater DC arc control device according to claim 1, characterized in that: The upper flange cover is provided with a radial sealing groove and an axial sealing groove to seal the arc extinguishing cover, and the radial sealing groove and the axial sealing groove are respectively provided with nitrile sealing rings.

7. The underwater DC arc control device according to claim 1, characterized in that: The predetermined gap is 1 mm.

8. The underwater DC arc control device according to claim 1, characterized in that: The ends of the horizontal section are either beveled or rounded.

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