Arc extinguish chamber nozzle device for optical diagnosis of gas circuit breaker

Abstract

The utility model discloses an arc extinguish chamber nozzle device for optical diagnosis of a gas circuit breaker, which comprises a nozzle body, a throat communicated with an air inlet and an air outlet at two opposite ends is formed in the nozzle body, and a hole body assembly for optical measurement of an arc is arranged on the side wall of the nozzle body. The hole body assembly comprises a schlieren measuring hole group and a soup-son scattering method measuring hole group; the schlieren measuring hole group comprises two strip-shaped holes which are symmetrically formed in the nozzle body along the radial direction of the throat; and the soup-son scattering method measuring hole group comprises two cylindrical holes which are symmetrically formed in the nozzle body along the radial direction of the throat. A nozzle body is provided with a hole body assembly and a soup-son scattering method measuring hole set, and two strip-shaped holes are symmetrically formed in the nozzle body in the radial direction of a throat; the two cylindrical holes are symmetrically formed in the nozzle body in the radial direction of the throat, the schlieren measurement method or the soup-son scattering method can be selected to measure the arc according to needs, and therefore the arc measurement universality of the arc extinguish chamber nozzle device provided by the utility model is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker breaking arc measurement, in particular to an arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker. Background Art

[0002] The arc extinguishing chamber nozzle device is a part that restricts the flow of arc and gas in high-voltage gas circuit breakers. When the two contacts of the circuit breaker are separated, the arc is maintained in the nozzle. When the contacts are separated to a certain distance, the high-pressure gas in the circuit breaker pressure cylinder blows from one side of the nozzle to the other side, thereby achieving the effect of cooling and extinguishing the arc.

[0003] The design of the throat is very important for the circuit breaker to interrupt the arc. Therefore, the arc plasma in the throat during the arcing stage and when the current passes through zero is the main object of optical measurement.

[0004] In the arc measurement technology of high-voltage gas circuit breakers, when measuring arcs by optical methods such as Schlieren method, emission spectroscopy, and Thomson scattering method, it is necessary to open a hole in the nozzle (part) in the arc extinguishing chamber of the high-voltage gas circuit breaker to meet the requirements of optical path measurement. However, the traditional arc extinguishing chamber nozzle device can only be measured using one arc measurement technology, resulting in low versatility of arc measurement of the arc extinguishing chamber nozzle device.

[0005] Therefore, how to improve the arc measurement versatility of the arc extinguishing chamber nozzle device is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The utility model aims to provide an arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker, which improves the arc measurement versatility of the arc extinguishing chamber nozzle device.

[0007] The present application provides an arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker, comprising a nozzle body, wherein a throat connecting an air inlet and an air outlet at two opposite ends is formed inside the nozzle body, and a hole body component for arc optical measurement is provided on a side wall of the nozzle body, wherein the hole body component comprises:

[0008] A Schlieren measurement hole group, wherein the Schlieren measurement holes include two strip holes radially arranged along the throat and symmetrically arranged on the nozzle body;

[0009] A Thomson scattering method measurement hole group, wherein the Thomson scattering method measurement hole group comprises two cylindrical holes radially arranged along the throat and symmetrically arranged on the nozzle body.

[0010] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of gas circuit breakers, the centers of the schlieren measurement hole group and the Thomson scattering measurement hole group are located on the same first section along a direction perpendicular to the throat axis, and a line connecting the centers of the two strip holes is perpendicular to a line connecting the centers of the two cylindrical holes.

[0011] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of gas circuit breaker, the first cross section is the cross section of the throat at the shortest diameter position along the axial direction.

[0012] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of gas circuit breaker, it also includes a plug for sealing the cylindrical hole, and the plug is detachably connected to the nozzle body.

[0013] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker, the plug is threadedly connected to the cylindrical hole, and the plug is connected to the cylindrical hole in a one-to-one correspondence.

[0014] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of the gas circuit breaker, the nozzle body is provided with a stepped hole, the stepped hole is the cylindrical hole, the stepped hole includes a first hole body connected to the outer surface of the nozzle body and a second hole body connected to the inner surface of the nozzle body, the inner diameter of the first hole body is larger than the inner diameter of the second hole body, and the plug is threadedly connected to the first hole body.

[0015] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of gas circuit breaker, the outer surface of the nozzle body is provided with a concave annular groove body at the position of the schlieren measurement hole group and the Thomson scattering method measurement hole.

[0016] Optionally, in the above-mentioned arc extinguishing chamber nozzle device for optical diagnosis of gas circuit breaker, the inner diameter of the cylindrical hole is less than 4 mm.

[0017] Optionally, in the arc extinguishing chamber nozzle device for optical diagnosis of the above-mentioned gas circuit breaker, the length of the strip hole extends along the radial direction of the throat, the two ends of the strip hole in the length direction extend to the two ends in the radial direction of the throat, and the width of the strip hole is less than 10 mm.

[0018] Optionally, the arc extinguishing chamber nozzle device for optical diagnosis of the gas circuit breaker further includes a transparent window sealed at the position of the strip-shaped hole.

[0019] In the above technical scheme, the arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker provided by the utility model includes a nozzle body, a throat connecting the air inlet and the air outlet at two opposite ends is formed inside the nozzle body, and the side wall of the nozzle body is provided with a hole body component for arc optical measurement, and the hole body component includes a Schlieren measurement hole group and a Thomson scattering method measurement hole group. The Schlieren measurement hole includes two strip holes radially arranged along the throat and symmetrically arranged on the nozzle body; the Thomson scattering method measurement hole group includes two cylindrical holes radially arranged along the throat and symmetrically arranged on the nozzle body.

[0020] From the above description, it can be known that in the arc extinguishing chamber nozzle device provided in the present application, a hole body assembly and a Thomson scattering method measurement hole group are arranged on the nozzle body, two strip holes are arranged symmetrically on the nozzle body along the radial direction of the throat; two cylindrical holes are arranged symmetrically on the nozzle body along the radial direction of the throat, and the arc can be measured by Schlieren measurement or Thomson scattering method according to needs. Therefore, the arc measurement versatility of the arc extinguishing chamber nozzle device provided in the application is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an arc extinguishing chamber nozzle device provided by an embodiment of the utility model;

[0023] Figure 2 A schematic diagram showing the structure of the strip-shaped hole of the arc extinguishing chamber nozzle device provided by the embodiment of the utility model;

[0024] Figure 3 A schematic diagram showing the structure of a cylindrical hole in the arc extinguishing chamber nozzle device provided by an embodiment of the utility model;

[0025] Figure 4 A cross-sectional view of an arc extinguishing chamber nozzle device provided by an embodiment of the utility model;

[0026] Figure 5 A cross-sectional view of an arc extinguishing chamber nozzle device from another perspective provided by an embodiment of the utility model;

[0027] Figure 6 for Figure 1 The schematic diagram of the structure of the nozzle device of the arc extinguishing chamber is shown;

[0028] Figure 7A schematic diagram of the structure of the arc extinguishing chamber nozzle device provided by the embodiment of the utility model when measured by the Thomson scattering method;

[0029] Figure 8 A schematic diagram of the structure of the arc extinguishing chamber nozzle device provided in an embodiment of the utility model when measured using the Schlieren method.

[0030] in Figure 1-8 Middle: 1-nozzle body, 2-strip hole, 3-cylindrical hole, 4-annular groove, 5-throat, 6-first hole, 7-second hole, 8-arc, 9-light emitted to the arc, 10-scattered light to be collected, 11-light to be photographed. DETAILED DESCRIPTION

[0031] The core of the utility model is to provide an arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker, and the arc extinguishing chamber nozzle device has improved arc measurement versatility.

[0032] The following will be combined with the accompanying drawings in the embodiments of the present utility model. Figure 1 A schematic diagram of the three-dimensional structure of an arc extinguishing chamber nozzle device provided by an embodiment of the utility model; Figure 2 A schematic diagram showing the structure of the strip-shaped hole of the arc extinguishing chamber nozzle device provided by the embodiment of the utility model; Figure 3 A schematic diagram showing the structure of a cylindrical hole in the arc extinguishing chamber nozzle device provided by an embodiment of the utility model; Figure 4 A cross-sectional view of an arc extinguishing chamber nozzle device provided by an embodiment of the utility model; Figure 5 A cross-sectional view of an arc extinguishing chamber nozzle device from another perspective provided by an embodiment of the utility model;

[0033] Figure 6 for Figure 1 The schematic diagram of the structure of the nozzle device of the arc extinguishing chamber is shown; Figure 7 A schematic diagram of the structure of the arc extinguishing chamber nozzle device provided by the embodiment of the utility model when measured by the Thomson scattering method;

[0034] Figure 8 The schematic diagram of the structure of the arc extinguishing chamber nozzle device provided in the embodiment of the utility model when the Schlieren method is used for measurement clearly and completely describes the technical scheme in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Please refer to Figures 1 to 8In a specific embodiment, the arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker provided in a specific embodiment of the utility model includes a nozzle body 1, a throat 5 connecting an air inlet and an air outlet at two opposite ends is formed inside the nozzle body 1, and a hole body assembly for arc optical measurement is provided on the side wall of the nozzle body 1, and the hole body assembly includes a Schlieren measurement hole group and a Thomson scattering method measurement hole group.

[0036] The Schlieren measurement hole includes two strip holes 2 radially arranged along the throat 5 and symmetrically arranged on the nozzle body 1. For ease of processing, preferably, the strip holes 2 are rectangular hole structures, wherein the surface of the strip holes 2 channels is a plane.

[0037] The Thomson scattering method measurement hole group includes two cylindrical holes 3 symmetrically arranged on the nozzle body 1 along the radial direction of the throat 5. Specifically, along the direction perpendicular to the axis of the throat 5, the centers of the Schlieren measurement hole group and the Thomson scattering method measurement hole group can be staggered, preferably, along the direction perpendicular to the axis of the throat 5, the centers of the Schlieren measurement hole group and the Thomson scattering method measurement hole group are on the same first section.

[0038] Specifically, the first cross section is the cross section at the shortest diameter position of the throat 5 along the axial direction. Of course, according to actual needs, the first cross section can also deviate from the cross section at the shortest diameter position of the throat 5 along the axial direction.

[0039] Preferably, the center line connecting the two strip holes 2 is perpendicular to the center line connecting the two cylindrical holes 3. In specific processing, the angle between the two center lines may be greater than an obtuse angle or an acute angle.

[0040] In order to facilitate the processing of the Schlieren measurement hole group and the Thomson scattering method measurement hole group, it is preferred that before opening the holes, some cutting is performed on the material at the nozzle position according to the convenience of processing, and the outer surface of the nozzle body 1 is provided with a concave annular groove body 4 at the position of the Schlieren measurement hole group and the Thomson scattering method measurement hole.

[0041] The two strip holes 2 are preferably hole structures with the same size, and the depth of the strip hole 2 is the thickness of the position where the throat 5 is connected to the outer surface of the nozzle.

[0042] The arc extinguishing chamber nozzle device provided in the present application also includes a transparent window sealed at the position of the strip hole 2. Specifically, the transparent window can be a glass structure. The transparent window can be pasted at the position of the nozzle body 1. In order to improve the installation stability of the transparent window, preferably, the transparent window is installed at the position of the strip hole 2 by a threaded fastener. Specifically, the outer surface of the nozzle body 1 is used to install the transparent window, which is a planar structure. Specifically, a threaded hole for installing a threaded fastener is provided.

[0043] The transparent window may be made of transparent quartz glass or organic glass, which can seal the gas inside the throat 5 .

[0044] Specifically, the surfaces of the nozzle body 1 on which the strip holes 2 and the circular holes are formed are both plane and are arranged perpendicular to each other.

[0045] Specifically, the length of the circular hole may be greater than or equal to 10 mm. In this case, during use, the circular hole is always in a connected state.

[0046] The arc extinguishing chamber nozzle device provided in the present application further comprises a plug for blocking the cylindrical hole 3, and the plug is detachably connected to the nozzle body 1. Specifically, the plug can be an elastic member, and the cylindrical hole 3 is blocked by elastic deformation of the plug.

[0047] In order to improve the connection stability, preferably, the plug is threadedly connected to the cylindrical hole 3, and the plug is connected one-to-one with the cylindrical hole 3. Specifically, there are two plugs, and one plug is arranged at each cylindrical hole 3.

[0048] like Figure 5 As shown, specifically, the inner diameter of the cylindrical hole 3 can be less than 4 mm, specifically, the inner diameter of the cylindrical hole 3 can be 2 mm-3 mm. The length of the cylindrical hole 3 can be between 9 mm and 12 mm, wherein the length of the cylindrical hole 3 is the distance between the outer surface and the inner surface extending from both ends of the nozzle body 1 at the position of the cylindrical hole 3. That is, the cylindrical hole 3 is a cylindrical hole 3 body structure with exactly the same diameter.

[0049] like Figure 6 As shown, the nozzle body 1 is provided with a stepped hole, which is a cylindrical hole 3. The stepped hole includes a first hole body 6 connected to the outer surface of the nozzle body 1 and a second hole body 7 connected to the inner surface of the nozzle body 1. The inner diameter of the first hole body 6 is larger than the inner diameter of the second hole body 7. The plug is threadedly connected to the first hole body 6. At this time, the length of the cylindrical hole 3 can be greater than 12mm. The first hole body 6 is set as a threaded hole, which can be specifically an M10 thread or an M12 thread. At this time, the plug can be a screw structure.

[0050] The first hole body 6 and the second hole body 7 are connected in inner diameter, and the step surface can be arranged perpendicular to the first hole body 6 and the second hole body 7. After the first hole body 6 is blocked, the strip hole 2 can be used for Schlieren measurement.

[0051] In a specific embodiment, the length of the strip hole 2 extends along the radial direction of the throat 5, the two ends of the strip hole 2 in the length direction extend to the two ends of the throat 5 in the radial direction, and the width of the strip hole 2 is less than 10 mm.

[0052] Specifically, the length of the strip hole 2 is slightly smaller than the diameter of the roar channel, and the width is less than 10 mm.

[0053] From the above description, it can be known that in the arc extinguishing chamber nozzle device provided in the present application, a hole body assembly and a Thomson scattering method measurement hole group are arranged on the nozzle body 1, two strip holes 2 are radially arranged along the throat 5 and symmetrically arranged on the nozzle body 1; two cylindrical holes 3 are radially arranged along the throat 5 and symmetrically arranged on the nozzle body 1, and the arc 8 can be measured by the Schlieren measurement or the Thomson scattering method according to the needs. Therefore, the arc 8 measurement versatility of the arc 8 measurement of the arc extinguishing chamber nozzle device provided in the application is improved.

[0054] When the Schlieren measurement is carried out, the cylindrical hole 3 can be sealed with a screw to reduce the influence of the opening on the nozzle.

[0055] When the Thomson scattering method is used for measurement, the plugging screws need to be removed. The hole opening and plugging method of this application basically does not change the geometric shape and size of the original nozzle roar channel, and has little effect on the arc extinguishing performance of the arc extinguishing chamber nozzle.

[0056] The arc extinguishing chamber nozzle device provided in the present application can realize the common use of Schlieren and Thomson optical measurement methods. There is no need to replace the nozzle. The two test methods can be switched by simply changing the nozzle installation angle, which simplifies the test process and facilitates wide promotion and use.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker, characterized in that: The invention comprises a nozzle body (1), wherein a throat (5) is formed inside the nozzle body (1) and communicates with an air inlet and an air outlet at two opposite ends, and a hole body component for arc optical measurement is provided on the side wall of the nozzle body (1), wherein the hole body component comprises: A Schlieren measurement hole group, the Schlieren measurement holes comprising two strip holes (2) radially arranged along the throat (5) and symmetrically arranged on the nozzle body (1); A Thomson scattering method measurement hole group, the Thomson scattering method measurement hole group comprising two cylindrical holes (3) radially arranged along the throat (5) and symmetrically arranged on the nozzle body (1).

2. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 1, characterized in that: The centers of the Schlieren measurement hole group and the Thomson scattering method measurement hole group are located on the same first section along a direction perpendicular to the axis of the throat (5), and a center line connecting the two strip holes (2) is perpendicular to a center line connecting the two cylindrical holes (3).

3. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 2, characterized in that: The first cross section is a cross section of the throat (5) at a position with the shortest diameter along the axial direction.

4. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 1, characterized in that: It also comprises a plug for sealing the cylindrical hole (3), and the plug is detachably connected to the nozzle body (1).

5. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 4, characterized in that: The plug is threadedly connected to the cylindrical hole (3), and the plug is connected to the cylindrical hole (3) in a one-to-one correspondence.

6. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 4, characterized in that: The nozzle body (1) is provided with a stepped hole, the stepped hole being the cylindrical hole (3), the stepped hole comprising a first hole body (6) connected to the outer surface of the nozzle body (1) and a second hole body (7) connected to the inner surface of the nozzle body (1), the inner diameter of the first hole body (6) being larger than the inner diameter of the second hole body (7), and the plug is threadedly connected to the first hole body (6).

7. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 6, characterized in that: The outer surface of the nozzle body (1) is provided with a concave annular groove body (4) provided with the Schlieren measurement hole group and the Thomson scattering method measurement hole.

8. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 1, characterized in that: The inner diameter of the cylindrical hole (3) is less than 4 mm.

9. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to claim 1, characterized in that: The length of the strip hole (2) extends along the radial direction of the throat (5), the two ends of the strip hole (2) in the length direction extend to the two ends of the throat (5) in the radial direction, and the width of the strip hole (2) is less than 10 mm.

10. The arc extinguishing chamber nozzle device for optical diagnosis of a gas circuit breaker according to any one of claims 1 to 9, characterized in that: It also comprises a transparent window which is blocked at the position of the strip-shaped hole (2).

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