Low-inductance high-voltage plastic shell pulse capacitor

Abstract

The utility model discloses a low-inductance high-voltage plastic shell pulse capacitor, which comprises a plastic shell and a pulse capacitor body fixedly arranged in the plastic shell, a high-voltage line is fixedly arranged at the upper end of the pulse capacitor body, and an insulating base is fixedly arranged at the upper end of the high-voltage line. An output connector is fixedly installed at the upper end of the insulation base, a protection shell is fixedly installed at the bottom of the insulation base and isolates the bottom of the insulation base, and a protection mechanism is arranged on the outer side of the insulation base. According to the low-inductance high-voltage plastic shell pulse capacitor, if the interior of the device is short-circuited, a protection circuit is disconnected, an electromagnet loses power, and an adsorption iron sheet cannot be adsorbed, at the moment, a puncture cone is influenced by the tension of a reset spring, and the puncture cone slides outwards along a limiting groove through a limiting block, so that the plastic shell and a material on the surface of the plastic shell are punctured; air in the pulse capacitor is communicated with the outside, and overload expansion explosion in the pulse capacitor is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse capacitors, in particular to a low-inductance high-voltage plastic case pulse capacitor. Background Art

[0002] Low inductance high voltage molded case pulse capacitors are usually used to store and release energy. This type of capacitor has low inductance and high voltage characteristics and is suitable for occasions where high frequency pulse energy transmission is required. The setting of the molded case can make the device have good insulation performance and mechanical protection, ensuring that the capacitor can operate stably in harsh environments. However, existing pulse capacitors still have certain defects, such as:

[0003] For example, a pulse capacitor with announcement number CN207068656U includes a pulse capacitor body, an insulating seat, a reinforcing plate and a bottom plate reinforcing rib. A cover plate is arranged on the top of the pulse capacitor body, an insulating seat is arranged on the top of the cover plate, a lead-out terminal is arranged on the top of the insulating seat, a SIL silicone rubber sealing ring is arranged on the bottom of the insulating seat, an oil filling hole is arranged in the middle of the insulating seat, reinforcing plates are arranged on both sides of the pulse capacitor body, a bottom plate reinforcing rib is arranged on the bottom of the pulse capacitor body, and a PVC transparent plastic plate is arranged on the inner side of the pulse capacitor body. The pulse capacitor has good insulation performance and is suitable for various capacitors. It has stable chemical properties, will not rust, has good impact resistance, and has good transparency and wear resistance. The reinforcing plate is made of aluminum alloy and welded on the pulse capacitor. It is light and strong, which improves the shock resistance of the pulse capacitor and is convenient for protecting the pulse capacitor.

[0004] The above-mentioned pulse capacitor adopts aluminum alloy material through the reinforcement plate, so that the device can have better shock resistance. However, after using the device, if the internal circuit of the device is overloaded and heated, it is easy to cause the internal heat expansion of the pulse capacitor, which may cause the risk of explosion. Utility Model Content

[0005] The utility model aims to provide a low inductance high voltage plastic case pulse capacitor to solve the problem in the background technology that if the internal circuit of the device is overloaded and heated, it is easy to cause the internal heat expansion of the pulse capacitor and the risk of explosion.

[0006] To achieve the above object, the utility model provides the following technical solutions: a low inductance high voltage plastic case pulse capacitor, comprising a plastic case and a pulse capacitor body fixedly installed inside the plastic case, a high voltage circuit fixedly installed on the upper end of the pulse capacitor body, an insulating base fixedly installed on the upper end of the high voltage circuit, and an output connector fixedly installed on the upper end of the insulating base;

[0007] A protective shell is fixedly mounted on the bottom of the insulating base, and the protective shell isolates the bottom of the insulating base, and a protective mechanism is arranged on the outside of the insulating base;

[0008] The inner wall bolts of the plastic shell are equipped with a puncture chamber, and an automatic puncture explosion-proof mechanism is arranged inside the puncture chamber, and the automatic puncture explosion-proof mechanism punctures the plastic shell through the puncture chamber.

[0009] Furthermore, a plastic shell is installed through the middle end of the insulating base, and three groups of insulating bases and output connectors are provided, and the insulating base is made of insulating rubber material.

[0010] Furthermore, the protection mechanism is provided with a protection fuse, and the protection fuse is arranged at the upper end of the high-voltage line, and the protection fuse is automatically disconnected when it is overloaded.

[0011] Furthermore, a metal film layer is bonded to the outer side of the plastic shell, and an insulating ceramic layer is bonded to the outer side of the metal film layer.

[0012] Furthermore, the automatic puncture explosion-proof mechanism is provided with an electromagnet, and the inner side of the electromagnet is installed through the inner wall of the puncture bin, the inner wall of the puncture bin is provided with a limiting groove, a puncture cone is provided inside the puncture bin, and limiting blocks are fixedly installed at both ends of the puncture cone, and the connection method between the limiting block and the limiting groove is a sliding connection.

[0013] Furthermore, a protection circuit is provided inside the electromagnet, and the protection circuit is connected to the high-voltage circuit, and the protection circuit is automatically disconnected when overloaded.

[0014] Furthermore, an adsorption iron sheet is fixedly installed on the inner side of the puncture cone, and the adsorption iron sheet corresponds to the adsorption position of the electromagnet, and a reset spring is fixedly installed between the puncture cone and the inner wall of the plastic shell.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. A pulse capacitor body capable of low inductance and high voltage is provided. The pulse capacitor body transmits its energy to the output connector at the upper end of the insulating base through a high voltage line. The setting of three output connectors can make the device more practical;

[0017] 2. A protective shell is provided on the outside of the high-voltage circuit to protect the connection position between the high-voltage circuit and the output connector, so as to prevent the connection position from falling off and being damaged when the device falls, thereby improving the anti-seismic effect of the device;

[0018] Furthermore, when the high-voltage line transmits low-inductance high-voltage current, if an overload occurs, the protective fuse provided at the upper end of the high-voltage line is blown, causing the circuit inside the device to be automatically disconnected, thereby enabling timely short-circuit protection;

[0019] Furthermore, a metal film layer is arranged on the outside of the plastic shell. The metal film layer can improve the structural strength of the device through its own characteristics, and cooperate with the insulating ceramic layer on the outside of the metal film layer to effectively isolate the internal power voltage, thereby preventing safety accidents caused by electric shock when the staff is working;

[0020] 3. A mechanism capable of puncturing and explosion-proofing is arranged on the inner wall of the plastic shell. When the device is working normally, the electromagnet is powered by a protection circuit connected to the high-voltage circuit, so that the electromagnet can be energized to adsorb the adsorbed iron sheet. The adsorbed iron sheet causes the puncture cone to move inward along the limit groove through the limit block to stretch the reset spring. If a short circuit occurs inside the device, the protection circuit is disconnected, the electromagnet loses power supply, and cannot adsorb the adsorbed iron sheet. At this time, the puncture cone is affected by the pulling force of the reset spring, and the puncture cone slides outward along the limit groove through the limit block to puncture the plastic shell and the material on its surface, so that the air inside the pulse capacitor communicates with the outside world, thereby avoiding overload, expansion and explosion inside the pulse capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the plastic shell of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the plastic shell of the utility model;

[0025] Figure 5 This is a schematic diagram of the front cross-sectional structure of the puncture chamber of the utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the puncture cone of the utility model.

[0027] In the figure: 1. Plastic shell; 2. Pulse capacitor body; 3. High-voltage circuit; 4. Insulating base; 5. Output connector; 6. Protective shell; 7. Protective fuse; 8. Metal film layer; 9. Insulating ceramic layer; 10. Puncture chamber; 11. Electromagnet; 12. Protective circuit; 13. Puncture cone; 14. Adsorption iron sheet; 15. Limit block; 16. Limit groove; 17. Reset spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0029] Embodiment 1:

[0030] like Figure 1 and Figure 2 The technical solution shown, in order to solve the problem of low use range of pulse capacitors, discloses multiple groups of output terminals: a plastic shell 1 and a pulse capacitor body 2 is fixedly installed inside the plastic shell 1, and a high-voltage line 3 is fixedly installed on the upper end of the pulse capacitor body 2, and an insulating base 4 is fixedly installed on the upper end of the high-voltage line 3, and an output connector 5 is fixedly installed on the upper end of the insulating base 4, the middle end of the insulating base 4 penetrates the plastic shell 1, and the insulating base 4 and the output connector 5 are provided with three groups, and the insulating base 4 is made of insulating rubber material;

[0031] In this example, a pulse capacitor body 2 capable of low inductance and high voltage is provided. The pulse capacitor body 2 is fixedly arranged inside the plastic housing 1. The pulse capacitor body 2 transmits its energy to an output connector 5 at the upper end of an insulating base 4 through a high voltage line 3. The provision of three output connectors 5 can make the device more practical. Example

[0032] like Figure 2 , Figure 3 , Figure 4 and Figure 5 The technical solution shown, in order to solve the problem that the device is easily damaged, discloses a protection mechanism: a protection shell 6 is fixedly installed at the bottom of the insulating base 4, and the protection shell 6 isolates the bottom of the insulating base 4, and a protection mechanism is arranged on the outside of the insulating base 4, and the protection mechanism is provided with a protection fuse 7, and the protection fuse 7 is arranged at the upper end of the high-voltage line 3, and the protection fuse 7 is automatically disconnected when overloaded, and a metal film layer 8 is bonded to the outside of the plastic shell 1, and an insulating ceramic layer 9 is bonded to the outer side of the metal film layer 8;

[0033] In this example, a protective shell 6 is provided on the outside of the high-voltage line 3, and the protective shell 6 protects the connection position between the high-voltage line 3 and the output connector 5 to prevent the connection position from falling off and being damaged when the device falls, and can improve the anti-seismic effect of the device. When the high-voltage line 3 transmits a low-inductance high-voltage current, if an overload occurs, the protective fuse 7 provided on the upper end of the high-voltage line 3 is burned out, so that the circuit inside the device is automatically disconnected, so that short-circuit protection can be performed in time. A metal film layer 8 is provided on the outside of the plastic shell 1. The metal film layer 8 can improve the structural strength of the device through its own characteristics, and cooperate with the insulating ceramic layer 9 on the outside of the metal film layer 8 to effectively isolate the internal power voltage, so as to prevent safety accidents caused by electric shock when the staff is working; Example

[0034] like Figure 2 , Figure 5 and Figure 6 The technical solution shown in the figure, in order to solve the problem that the pulse capacitor is prone to explosion under long-term high-temperature overload operation, discloses an automatic puncture explosion-proof mechanism: the inner wall bolt of the plastic shell 1 is installed with a puncture chamber 10, and the puncture chamber 10 is provided with an automatic puncture explosion-proof mechanism, and the automatic puncture explosion-proof mechanism punctures the plastic shell 1 through the puncture chamber 10, and the automatic puncture explosion-proof mechanism is provided with an electromagnet 11, and the inner side of the electromagnet 11 is installed through the inner wall of the puncture chamber 10, and the inner wall of the puncture chamber 10 is provided with a limiting groove 16, and the puncture chamber 1 0 is provided with a puncture cone 13 inside, and the upper and lower ends of the puncture cone 13 are fixedly installed with limit blocks 15, and the connection mode of the limit block 15 and the limit groove 16 is a sliding connection, a protection circuit 12 is provided on the inner side of the electromagnet 11, and the protection circuit 12 is connected to the high-voltage circuit 3, and the protection circuit 12 is automatically disconnected when overloaded, an adsorption iron sheet 14 is fixedly installed on the inner side of the puncture cone 13, and the adsorption iron sheet 14 corresponds to the adsorption position of the electromagnet 11, and a reset spring 17 is fixedly installed between the puncture cone 13 and the inner wall of the plastic shell 1;

[0035] In this example, a mechanism capable of puncturing and explosion-proofing is provided on the inner wall of the plastic shell 1. When the device is working normally, the electromagnet 11 is powered by the protection circuit 12 connected to the high-voltage circuit 3, so that the electromagnet 11 can be energized to adsorb the adsorbed iron sheet 14. The adsorbed iron sheet 14 is adsorbed so that the puncture cone 13 moves inward along the limit groove 16 through the limit block 15 to stretch the reset spring 17. If a short circuit occurs inside the device, the protection circuit 12 is disconnected, the electromagnet 11 loses power supply, and cannot adsorb the adsorbed iron sheet 14. At this time, the puncture cone is affected by the pulling force of 13 to the reset spring 17, and the puncture cone 13 slides outward along the limit groove 16 through the limit block 15, thereby puncturing the plastic shell 1 and the material on its surface, so that the air inside the pulse capacitor body 2 is communicated with the outside world, thereby avoiding overload, expansion and explosion inside the pulse capacitor.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-inductance high-voltage plastic case pulse capacitor, comprising a plastic case (1) and a pulse capacitor body (2) fixedly mounted inside the plastic case (1), a high-voltage line (3) fixedly mounted on the upper end of the pulse capacitor body (2), an insulating base (4) fixedly mounted on the upper end of the high-voltage line (3), and an output connector (5) fixedly mounted on the upper end of the insulating base (4); Features: A protective shell (6) is fixedly mounted on the bottom of the insulating base (4), and the protective shell (6) isolates the bottom of the insulating base (4), and a protective mechanism is arranged on the outside of the insulating base (4); The inner wall bolts of the plastic housing (1) are equipped with a puncture chamber (10), and an automatic puncture explosion-proof mechanism is arranged inside the puncture chamber (10), and the automatic puncture explosion-proof mechanism punctures the plastic housing (1) through the puncture chamber (10).

2. A low inductance high voltage plastic case pulse capacitor according to claim 1, characterized in that: The middle end of the insulating base (4) penetrates the plastic housing (1), and three groups of insulating bases (4) and output connectors (5) are provided. The insulating base (4) is made of insulating rubber material.

3. The low inductance high voltage molded case pulse capacitor according to claim 1, characterized in that: The protection mechanism is provided with a protection fuse (7), and the protection fuse (7) is arranged at the upper end of the high-voltage line (3), and the protection fuse (7) is automatically disconnected when overloaded.

4. A low inductance high voltage molded case pulse capacitor according to claim 3, characterized in that: A metal film layer (8) is bonded to the outer side of the plastic shell (1), and an insulating ceramic layer (9) is bonded to the outer side of the metal film layer (8).

5. The low inductance high voltage molded case pulse capacitor according to claim 1, characterized in that: The automatic puncture explosion-proof mechanism is provided with an electromagnet (11), and the inner side of the electromagnet (11) is installed through the inner wall of the puncture chamber (10), and the inner wall of the puncture chamber (10) is provided with a limit groove (16), and a puncture cone (13) is provided inside the puncture chamber (10), and limit blocks (15) are fixedly installed at both upper and lower ends of the puncture cone (13), and the connection mode of the limit block (15) and the limit groove (16) is a sliding connection.

6. A low inductance high voltage molded case pulse capacitor according to claim 5, characterized in that: A protection circuit (12) is provided inside the electromagnet (11), the protection circuit (12) is connected to the high-voltage circuit (3), and the protection circuit (12) is automatically disconnected when overloaded.

7. A low inductance high voltage molded case pulse capacitor according to claim 6, characterized in that: An adsorption iron sheet (14) is fixedly mounted on the inner side of the puncture cone (13), and the adsorption iron sheet (14) corresponds to the adsorption position of the electromagnet (11), and a return spring (17) is fixedly mounted between the puncture cone (13) and the inner wall of the plastic housing (1).

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