Sphere gap type high-voltage discharge switch

Abstract

The utility model relates to a sphere gap type high-voltage discharge switch which comprises a first high-voltage pole plate, a second high-voltage pole plate and a low-voltage pole plate which are combined and connected through a supporting rod assembly. The semi-spherical assembly is arranged between the first high-voltage polar plate and the second high-voltage polar plate and comprises an upper semi-spherical electrode and a lower semi-spherical electrode, the spherical surfaces of the upper semi-spherical electrode and the lower semi-spherical electrode are oppositely arranged, and a sphere gap distance exists between the spherical surfaces; by means of a gap adjusting mechanism connected to the lower hemisphere electrode, the sphere gap distance between the spherical surfaces of the upper hemisphere electrode and the lower hemisphere electrode is adjustable. The sphere gap distance between the spherical surfaces of the upper hemisphere electrode and the lower hemisphere electrode is adjustable, and the whole gap adjusting process is driven by the gap adjusting mechanism, so that the workload of system debugging personnel is reduced, the adjusting time is saved, the adjusting precision is improved, and the working efficiency is improved. And continuous and stable discharge of the whole switch in a lightning test system is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch device, and particularly relates to a ball gap type high-voltage discharge switch applied to lightning test. BACKGROUND

[0002] The high-voltage discharge switch is a common electrical component in a high-voltage pulse generating device, and the ball gap type high-voltage discharge switch is the most typical one, which has the characteristics of simple structure and long service life. In the current high-voltage test process, such as impulse voltage / current test, the ball gap type high-voltage discharge switch is basically used as a trigger device.

[0003] Specifically in the context of lightning test, in order to avoid the generation of large current, high temperature, high pressure and strong electromagnetic force in the external attachment area of lightning, and thus cause many hazards such as burning, corrosion, explosion, structural distortion and strength reduction of the equipment, the lightning test is to simulate the direct / indirect effects generated when lightning directly acts on the equipment shell. The aforementioned ball gap type high-voltage discharge switch plays an indispensable role in the current lightning test system.

[0004] The ball gap type high-voltage discharge switch, as its name implies, needs to rely on a set of hemispherical elements in the triggering process. The set of hemispherical elements are fixedly arranged opposite to each other and have a certain gap therebetween. Under the condition that the relative density of air in the ball gap and the electric field are certain, the ball gap spacing is positively correlated with the trigger voltage, and the change of the ball gap spacing will directly affect the change of the trigger voltage, and thus affect the normal operation of the entire switch. In the theoretical case, if the ball gap spacing increases, the influence on the electric field distribution in the ball gap will also increase, which will lead to a decrease in the average breakdown strength and an increase in the dispersion of the breakdown voltage. Therefore, the ball gap spacing has an important influence on the trigger voltage, and it is necessary to accurately control the ball gap spacing in the ball gap type high-voltage discharge switch, especially in the key project of lightning test.

[0005] In the real scene, since the test object of lightning test is not fixed, the corresponding lightning test system often needs to be transported, assembled and debugged for a long time and frequently. With the bumps and knocks that may exist in the transportation and assembly process, the ball gap spacing in the ball gap type high-voltage discharge switch is likely to change, which will cause the precision of the entire test system to decrease. In addition, as described above, the hemispherical elements in the existing ball gap type high-voltage discharge switch are fixedly arranged, and once the ball gap spacing changes, the subsequent adjustment process is extremely time-consuming and laborious.

[0006] Therefore, how to propose a new ball gap type high-voltage discharge switch structure to facilitate the subsequent adjustment when the ball gap spacing changes and to ensure the continuous and stable discharge of the entire switch in the lightning test system has become a problem to be solved by the technical personnel in the field. The utility model discloses

[0007] In order to follow-up adjustment when the ball gap spacing changes, guarantee the whole switch in the lightning test system continuous stable discharge, the utility model provides a kind of ball gap high voltage discharge switch.

[0008] The utility model provides a kind of ball gap high voltage discharge switch, adopt the technical scheme as follows:

[0009] A kind of ball gap high voltage discharge switch, including a pair of high voltage plate assembly and a low voltage plate, the high voltage plate assembly includes oppositely arranged first high voltage plate and second high voltage plate, the high voltage plate assembly with the low voltage plate is combined by strutting rod component connection;

[0010] It further includes the hemispherical component between the first high voltage plate and the second high voltage plate, the hemispherical component includes upper hemispherical electrode and lower hemispherical electrode, the spherical surface of the upper hemispherical electrode and the lower hemispherical electrode is oppositely arranged and there is ball gap spacing between spherical surface;

[0011] The upper hemispherical electrode is fixedly arranged on the lower end surface of the first high voltage plate, the lower hemispherical electrode is movably connected to the upper end surface of the second high voltage plate by gap adjusting mechanism, under the driving of the gap adjusting mechanism, the ball gap spacing between the spherical surface of the upper hemispherical electrode and the lower hemispherical electrode is adjustable.

[0012] By adopting the above technical scheme, the ball gap spacing between the spherical surface of the upper hemispherical electrode and the lower hemispherical electrode is adjustable, and the whole gap adjusting process is driven by the gap adjusting mechanism, not only reduces the workload of system debugging personnel, saves the adjusting time, but also improves the adjusting precision, ensures that the whole switch can continuously and stably discharge in the lightning test system.

[0013] Preferably, the first high voltage plate, the second high voltage plate and the low voltage plate are stacked; in the combined state of the first high voltage plate, the second high voltage plate and the low voltage plate, the second high voltage plate is used as the high voltage output port of the switch as a whole, the low voltage plate is used as the low voltage output port of the switch as a whole, and the low voltage plate is grounded.

[0014] By adopting the above technical scheme, the high / low voltage output port of the switch as a whole is clear, which provides a clear basis for the electrical connection relationship between the switch as a whole and other components in the lightning test system.

[0015] Preferably, the upper end surface of the second high voltage plate is used as a horizontal reference surface, and the projections of the first high voltage plate and the second high voltage plate in the vertical direction are all / partially overlapped.

[0016] By adopting the technical scheme, the positional relationship between the first high-voltage electrode plate and the second high-voltage electrode plate is defined, and installation spaces are reserved for the specific arrangement of the upper hemispherical electrode and the lower hemispherical electrode, so that the spherical surfaces of the upper hemispherical electrode and the lower hemispherical electrode can be oppositely arranged and normally perform the discharge action in the combined state of the switch.

[0017] Preferably, the support rod assembly comprises a first support rod sleeve group, the first high-voltage electrode plate and the second high-voltage electrode plate are fixedly connected through the first support rod sleeve group, the first support rod sleeve group comprises at least three first support rods, the upper end of the first support rod is fixedly connected with the lower end surface of the first high-voltage electrode plate, and the lower end is fixedly connected with the upper end surface of the second high-voltage electrode plate, and the number of the first support rods is matched with the shapes of the first high-voltage electrode plate and the second high-voltage electrode plate.

[0018] Preferably, the support rod assembly further comprises a second support rod sleeve group, the second high-voltage electrode plate and the low-voltage electrode plate are fixedly connected through the second support rod sleeve group, the second support rod sleeve group comprises at least three second support rods, the upper end of the second support rod is fixedly connected with the lower end surface of the second high-voltage electrode plate, and the lower end is fixedly connected with the upper end surface of the low-voltage electrode plate, and the number of the second support rods is matched with the shapes of the second high-voltage electrode plate and the low-voltage electrode plate.

[0019] Preferably, the first support rod and the second support rod are both hollow insulating epoxy tubes, and a load protection resistor is arranged in the hollow inner cavity of the second support rod, one end of the load protection resistor is electrically connected with the second high-voltage electrode plate, and the other end is electrically connected with the low-voltage electrode plate.

[0020] By adopting the technical scheme, the specific arrangement and further detailed features of the support rod assembly are defined, and feasibility support is provided for the layering arrangement of the first high-voltage electrode plate, the second high-voltage electrode plate and the low-voltage electrode plate.

[0021] Preferably, the upper hemispherical electrode is electrically connected with a trigger, and the trigger penetrates through the first high-voltage electrode plate and is connected with an external functional device.

[0022] Preferably, the gap adjusting mechanism comprises a telescopic cylinder, a flexible connection flat cable and a fixed connecting piece, the cylinder body part of the telescopic cylinder is fixedly arranged on the upper end surface of the second high-voltage electrode plate, the cylinder shaft is fixedly connected with the plane of the lower hemispherical electrode through the fixed connecting piece, the lower hemispherical electrode can reciprocally move in a direction perpendicular to the upper end surface of the second high-voltage electrode plate under the driving of the telescopic cylinder, one end of the flexible connection flat cable is electrically connected with the lower hemispherical electrode, and the other end is electrically connected with the second high-voltage electrode plate.

[0023] By adopting the technical scheme, the up-and-down adjustment process of the gap adjustment mechanism to the lower sphere motor is clarified, and then the specific implementation mode of the adjustable ball gap distance between the spherical surfaces of the upper half-sphere electrode and the lower half-sphere electrode is illustrated. The applicant can extend the application of the scheme to more hardware systems with ball gap type switches, so as to further expand the application scenarios of the scheme and improve the application value of the scheme.

[0024] Preferably, the center axes of the upper half-sphere electrode and the lower half-sphere electrode coincide, and the center axis of the cylinder shaft of the telescopic cylinder is parallel to the center axes of the upper half-sphere electrode and the lower half-sphere electrode.

[0025] Preferably, the upper half-sphere electrode and the lower half-sphere electrode are both tungsten-copper half-sphere electrodes and have equivalent sizes.

[0026] By adopting the technical scheme, the upper half-sphere electrode and the lower half-sphere electrode can complete the discharge work in the optimal matching state, which maximally improves the practicability of the scheme and further ensures the continuous and stable discharge of the entire switch in the lightning test system.

[0027] In summary, the present application at least has the following beneficial effects:

[0028] 1. The technical scheme of the present application realizes the adjustable ball gap distance between the spherical surfaces of the upper half-sphere electrode and the lower half-sphere electrode, and the entire gap adjustment process is driven by the gap adjustment mechanism, which not only reduces the workload of system debugging personnel and saves the adjustment time, but also improves the adjustment precision and ensures the continuous and stable discharge of the entire switch in the lightning test system.

[0029] 2. The technical scheme of the present application optimizes the implementation mode of the gap adjustment, and the applicant can extend the application of the scheme to more hardware systems with ball gap type switches, so as to further expand the application scenarios of the scheme and improve the application value of the scheme. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is the overall structure schematic diagram of the ball gap type high-voltage discharge switch of the embodiment of the present application;

[0031] Fig. 2 is the overall structure schematic diagram of the ball gap type high-voltage discharge switch of the embodiment of the present application in another view.

[0032] Wherein: 1, first high-voltage plate; 2, second high-voltage plate; 3, low-voltage plate; 4, upper half-sphere electrode; 5, lower half-sphere electrode; 6, first support rod; 7, second support rod; 8, trigger; 9, telescopic cylinder; 10, flexible connection flat cable; 11, fixed connection piece. DETAILED DESCRIPTION

[0033] The application provides a ball gap type high-voltage discharge switch, in order to make the purpose, technical scheme and advantages of the application more clear, the following will be further detailed description of the embodiments of the application.

[0034] The application provides a ball gap type high-voltage discharge switch, in order to make the purpose, technical scheme and advantages of the application more clear, the following will be further detailed description of the embodiments of the application.

[0035] The application provides a ball gap type high-voltage discharge switch, in order to make the purpose, technical scheme and advantages of the application more clear, the following will be further detailed description of the embodiments of the application. Figs. 1-2 As shown in the figure, it comprises a pair of high-voltage plate assembly and a low-voltage plate 3, the high-voltage plate assembly contains the first high-voltage plate 1 and the second high-voltage plate 2 arranged oppositely, and the high-voltage plate assembly and the low-voltage plate 3 are combined and connected by the support rod assembly.

[0036] The ball gap type high-voltage discharge switch further comprises a hemispherical assembly arranged between the first high-voltage plate 1 and the second high-voltage plate 2, the hemispherical assembly contains the upper hemispherical electrode 4 and the lower hemispherical electrode 5, the spherical surfaces of the upper hemispherical electrode 4 and the lower hemispherical electrode 5 are arranged oppositely and there is a ball gap spacing between the spherical surfaces.

[0037] Specifically, the upper hemispherical electrode 4 is fixedly arranged at the lower end surface of the first high-voltage plate 1, the lower hemispherical electrode 5 is movably connected to the upper end surface of the second high-voltage plate 2 through the gap adjusting mechanism, and the ball gap spacing between the spherical surfaces of the upper hemispherical electrode 4 and the lower hemispherical electrode 5 can be adjusted under the driving of the gap adjusting mechanism. In this embodiment, both the upper hemispherical electrode 4 and the lower hemispherical electrode 5 are tungsten-copper hemispherical electrodes and their sizes are equivalent.

[0038] The first high-voltage plate 1, the second high-voltage plate 2 and the low-voltage plate 3 are arranged in layers and do not contact each other. In this embodiment, the first high-voltage plate 1, the second high-voltage plate 2 and the low-voltage plate 3 are arranged in parallel. In the combined state of the first high-voltage plate 1, the second high-voltage plate 2 and the low-voltage plate 3 and the entire ball gap type high-voltage discharge switch, the second high-voltage plate 2 is used as the high-voltage output port of the switch as a whole and is electrically connected with other components in the lightning test system, and the low-voltage plate 3 is used as the low-voltage output port of the switch as a whole and is electrically connected with other components in the lightning test system and is grounded.

[0039] In addition, it needs to be noted that the projections of the first high-voltage plate 1 and the second high-voltage plate 2 in the vertical direction all / partially overlap with each other with the upper end surface of the second high-voltage plate 2 as the horizontal reference surface. The purpose of such arrangement is to reserve installation space for the arrangement of the upper hemispherical electrode 4 and the lower hemispherical electrode 5 and to ensure that the spherical surfaces of the upper hemispherical electrode 4 and the lower hemispherical electrode 5 can be oppositely arranged.

[0040] The support rod assembly comprises a first support rod sleeve group, the first high-voltage plate 1 and the second high-voltage plate 2 are fixedly connected through the first support rod sleeve group, the first support rod sleeve group comprises at least three first support rods 6, the upper end of the first support rod 6 is fixedly connected with the lower end surface of the first high-voltage plate 1, the lower end of the first support rod 6 is fixedly connected with the upper end surface of the second high-voltage plate 2, and the number of the first support rod 6 is matched with the shapes of the first high-voltage plate 1 and the second high-voltage plate 2.

[0041] Here, the number of the first support rod 6 matched with the shapes of the first high-voltage plate 1 and the second high-voltage plate 2 means that the upper end surface of the second high-voltage plate 2 is taken as a horizontal reference surface, the first support rod 6 is generally vertically arranged and arranged at the top corner position of the first high-voltage plate 1 and the second high-voltage plate 2, therefore, the number of the first support rod 6 should be adjusted according to the corresponding number of top corners of the first high-voltage plate 1 and the second high-voltage plate 2. For example, when the first high-voltage plate 1 and the second high-voltage plate 2 are both quadrilaterals, the number of the first support rod 6 is four; if any one of the first high-voltage plate 1 and the second high-voltage plate 2 is a triangle, the number of the first support rod 6 is three. In addition, there is a special case, that is, any one of the first high-voltage plate 1 and the second high-voltage plate 2 is a circle, at this time, the number of the first support rod 6 only has the requirement of at least three, and there is no upper limit.

[0042] Similarly, the support rod assembly also comprises a second support rod sleeve group, the second high-voltage plate 2 and the low-voltage plate 3 are fixedly connected through the second support rod sleeve group, the second support rod sleeve group comprises at least three second support rods 7, the upper end of the second support rod 7 is fixedly connected with the lower end surface of the second high-voltage plate 2, the lower end of the second support rod 7 is fixedly connected with the upper end surface of the low-voltage plate 3, and the number of the second support rod 7 is matched with the shapes of the second high-voltage plate 2 and the low-voltage plate 3. The setting rule of the number of the second support rod 7 is the same as that of the number of the first support rod 6, which will not be repeated here.

[0043] The first support rod 6 and the second support rod 7 are both hollow insulating epoxy tubes, wherein the hollow inner cavity of the second support rod 7 is provided with a load protection resistor, one end of the load protection resistor is electrically connected with the second high-voltage plate 2, and the other end of the load protection resistor is electrically connected with the low-voltage plate 3. Through the load protection resistor, the second high-voltage plate 2 as the high-voltage output port and the low-voltage plate 3 as the low-voltage output port in the switch are kept insulated and isolated.

[0044] The upper hemisphere electrode 4 is electrically connected with a trigger 8, the trigger 8 penetrates through the first high-voltage plate 1 and is connected with an external functional device. In the embodiment, the trigger 8 can be a spark plug, a trigger electrode or the like.

[0045] The gap adjusting mechanism comprises a telescopic cylinder 9, a flexible connecting wire 10 and a fixed connecting piece 11. The cylinder body of the telescopic cylinder 9 is fixedly arranged on the upper end surface of the second high-voltage plate 2, and the cylinder shaft is fixedly connected with the plane of the lower hemisphere electrode 5 through the fixed connecting piece 11. Under the driving of the telescopic cylinder 9, the lower hemisphere electrode 5 can reciprocate along the direction perpendicular to the upper end surface of the second high-voltage plate 2.

[0046] One end of the flexible connecting wire 10 is electrically connected with the lower hemisphere electrode 5, and the other end is electrically connected with the second high-voltage plate 2. In the embodiment, the flexible connecting wire 10 is a soft copper material wire, and the number of the flexible connecting wire 10 is four, which are evenly distributed around the telescopic cylinder 9. Such material and number are arranged to ensure stable and efficient current conduction between the lower hemisphere electrode 5 and the second high-voltage plate 2.

[0047] The central axes of the upper hemisphere electrode 4 and the lower hemisphere electrode 5 coincide, and the central axis of the cylinder shaft of the telescopic cylinder 9 is parallel to the central axes of the upper hemisphere electrode 4 and the lower hemisphere electrode 5. In the embodiment, in order to ensure the adjustment accuracy of the ball gap distance, the central axis of the cylinder shaft of the telescopic cylinder 9 coincides with the central axes of the upper hemisphere electrode 4 and the lower hemisphere electrode 5, that is, the three central axes coincide.

[0048] In addition, it should be noted that in some special working conditions, the entire ball gap type high-voltage discharge switch is required to be accommodated in a box environment. At this time, the ball gap type high-voltage discharge switch can be placed in a shelter, and the high-voltage output port and the low-voltage output port of the shelter should be electrically connected with the second high-voltage plate 2 and the low-voltage plate 3 respectively. The shelter side wall of the output port position can be designed with an embedded epoxy plate, the port uses a wall bushing, and the panel is fixed with screws to facilitate the connection of the external copper bar

[0049] It should be understood that "multiple" referred to in the present text means two or more. The association relationship of "and / or" describing the associated objects means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the front and rear associated objects are in an "or" relationship.

[0050] The above is only an optional embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spherical gap high voltage discharge switch characterized by: The application relates to a high-voltage switch, which comprises a pair of high-voltage plate assemblies and a low-voltage plate (3), wherein the high-voltage plate assemblies comprise oppositely arranged first and second high-voltage plates (1, 2) and are combined with the low-voltage plate (3) through a support rod assembly. The application further comprises a hemispherical assembly arranged between the first and second high-voltage plates (1, 2), wherein the hemispherical assembly comprises an upper hemispherical electrode (4) and a lower hemispherical electrode (5), and the spherical surfaces of the upper and lower hemispherical electrodes (4, 5) are oppositely arranged and have a spherical gap spacing. The upper hemispherical electrode (4) is fixedly arranged on the lower end surface of the first high-voltage plate (1), the lower hemispherical electrode (5) is movably connected to the upper end surface of the second high-voltage plate (2) through a gap adjusting mechanism, and the spherical gap spacing between the spherical surfaces of the upper and lower hemispherical electrodes (4, 5) can be adjusted under the driving of the gap adjusting mechanism.

2. A ball gap high voltage discharge switch according to claim 1, characterized in that: The first and second high-voltage plates (1, 2) and the low-voltage plate (3) are stacked; in the combined state of the first and second high-voltage plates (1, 2) and the low-voltage plate (3), the second high-voltage plate (2) is used as the high-voltage output port of the switch as a whole, the low-voltage plate (3) is used as the low-voltage output port of the switch as a whole, and the low-voltage plate (3) is grounded.

3. The ball gap high voltage discharge switch of claim 1, wherein: The upper end surface of the second high-voltage plate (2) is used as a horizontal reference surface, and the projections of the first and second high-voltage plates (1, 2) in the vertical direction are all / partially overlapped.

4. The ball gap high voltage discharge switch of claim 1, wherein: The support rod assembly comprises a first support rod sleeve group, the first and second high-voltage plates (1, 2) are fixedly connected through the first support rod sleeve group, the first support rod sleeve group contains at least three first support rods (6), the upper end of each first support rod (6) is fixedly connected to the lower end surface of the first high-voltage plate (1), and the lower end is fixedly connected to the upper end surface of the second high-voltage plate (2), and the number of the first support rods (6) matches the shapes of the first and second high-voltage plates (1, 2).

5. A ball gap high voltage discharge switch according to claim 4, characterized in that: The support rod assembly further comprises a second support rod sleeve group, the second high-voltage plate (2) and the low-voltage plate (3) are fixedly connected through the second support rod sleeve group, the second support rod sleeve group contains at least three second support rods (7), the upper end of each second support rod (7) is fixedly connected to the lower end surface of the second high-voltage plate (2), and the lower end is fixedly connected to the upper end surface of the low-voltage plate (3), and the number of the second support rods (7) matches the shapes of the second high-voltage plate (2) and the low-voltage plate (3).

6. A ball gap high voltage discharge switch according to claim 5, characterized in that: The first and second support rods (6, 7) are hollow insulating epoxy tubes, wherein the hollow inner cavity of the second support rod (7) is provided with a load protection resistor, one end of the load protection resistor is electrically connected to the second high-voltage plate (2), and the other end is electrically connected to the low-voltage plate (3).

7. The ball gap high voltage discharge switch of claim 1, wherein: The upper hemisphere electrode (4) is electrically connected with a trigger (8), the trigger (8) penetrates the first high-voltage plate (1) and is connected with an external functional device.

8. The ball gap high voltage discharge switch of claim 1, wherein: The gap adjusting mechanism comprises a telescopic cylinder (9), a flexible connecting flat cable (10) and a fixed connecting piece (11), the cylinder body of the telescopic cylinder (9) is fixedly arranged on the upper end surface of the second high-voltage plate (2), the cylinder shaft is fixedly connected with the plane of the lower hemisphere electrode (5) through the fixed connecting piece (11), under the driving of the telescopic cylinder (9), the lower hemisphere electrode (5) can reciprocate along the direction perpendicular to the upper end surface of the second high-voltage plate (2), one end of the flexible connecting flat cable (10) is electrically connected with the lower hemisphere electrode (5), and the other end is electrically connected with the second high-voltage plate (2).

9. A ball gap high voltage discharge switch according to claim 8, characterized in that: The center axes of the upper hemisphere electrode (4) and the lower hemisphere electrode (5) coincide, and the center axis of the cylinder shaft of the telescopic cylinder (9) is parallel to the center axes of the upper hemisphere electrode (4) and the lower hemisphere electrode (5).

10. The ball gap high voltage discharge switch of claim 1, wherein: The upper hemisphere electrode (4) and the lower hemisphere electrode (5) are both tungsten-copper hemisphere electrodes and have the same size.

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