SH-E series elliptical self-healing low-voltage parallel capacitor device

Abstract

The utility model belongs to the technical field of electrical equipment, and particularly relates to an SH-E series elliptical self-healing low-voltage parallel capacitor device, which comprises a frosted tinplate shell group, and a power screw is fixed on the upper side of the frosted tinplate shell group. The device is composed of the frosted tinplate shell group, the power supply screw rod, the grounding terminal, the resistor, the explosion-proof security sheet, the braided copper wire, the metallized polypropylene film and the flame-retardant soft resin adhesive, so that disasters can be effectively prevented and isolated, the dry design is pollution-free, and the use safety is ensured; the loss is very low, and the service life is long; a self-recovery function, an over-temperature protection function and a unique protection system are provided, the weight is light, the structure is simple, the size is small, the operation is convenient, the voltage quality can be effectively improved, the power factor is improved, and the system power supply capability is improved; the improved capacitor device comprises an upper module and a lower module, can be quickly assembled and disassembled, and is extremely convenient to repair and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, concretely to a SH-E series oval self -healing type low -voltage shunt capacitor device. BACKGROUND

[0002] Self -healing type low -voltage shunt capacitor is a kind of low -voltage shunt capacitor, when breakdown occurs between poles medium, the metallized electrode layer around breakdown point will evaporate rapidly, automatically restore capacitor performance, in this capacitor, because the metallized layer on the medium layer is used as electrode, so it is also called metallized capacitor;

[0003] But the existing capacitor still has following technical problems when using:

[0004] The current capacitor is not convenient to disassemble and maintain quickly if damage occurs during use, and has shorter service life, lower safety and explosion-proof property, and higher energy consumption of capacitor due to larger contact resistance between gold spraying layer and metal layer.

[0005] Therefore, the SH-E series oval self -healing type low -voltage shunt capacitor device is proposed to solve the above problems. INVENTION CONTENTS

[0006] The utility model discloses a SH-E series oval self -healing type low -voltage shunt capacitor device to solve the problems in the above background art.

[0007] To achieve the above object, the utility model provides the following technical scheme: a SH-E series oval self -healing type low -voltage shunt capacitor device, including sandblasted sheet iron shell group, the upper side of sandblasted sheet iron shell group is fixed with power screw, the left end of sandblasted sheet iron shell group upper side is fixed with ground terminal, the inside of sandblasted sheet iron shell group is fixed with resistance, the lower end of resistance is fixed with explosion -proof security piece, the lower side of explosion -proof security piece is fixed with braided copper wire, the inside lower end of sandblasted sheet iron shell group is fixed with metallized polypropylene film, the lateral wall of metallized polypropylene film is fixed with flame -retardant soft resin glue.

[0008] Preferably, the metallized polypropylene film includes an electrode and a rim, the surface of the electrode is coated with metal, and the surface of the rim is free of metal coating.

[0009] Preferably, the lower end of the power screw is electrically connected to the resistance and the explosion -proof security piece through a power line.

[0010] Preferably, the lower end of the explosion -proof security piece is electrically connected to the metallized polypropylene film.

[0011] Preferably, the lower end of the braided copper wire extends into the interior of the metallized polypropylene film.

[0012] Compared with the prior art, the capacitor device has the advantages that:

[0013] The device is composed of a ground glass tin shell group, a power screw, a grounding terminal, a resistor, an explosion-proof safety piece, a braided copper wire, a metallized polypropylene film and a flame-retardant soft resin glue, can effectively prevent and isolate disasters, has no pollution in dry design, ensures safe use, has very low loss and long service life, has self-recovery function, over-temperature protection function, unique protection system, light weight, simple structure, small size and convenient operation, can effectively improve voltage quality, improve power factor and improve system power supply capacity, and the improved capacitor device is an upper and lower module, can be quickly assembled and disassembled and maintained, and maintenance is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the sectional structure of the utility model; Figure 1

[0016] Figure 3 It is a schematic diagram of the structure of the explosion-proof safety piece before safety action;

[0017] Figure 4 It is a schematic diagram of the structure of the explosion-proof safety piece after safety action;

[0018] Figure 5 It is a schematic diagram of the structure of the metallized polypropylene film;

[0019] Figure 6 It is a flow chart for preparing the capacitor device;

[0020] Figure 7 It is a system diagram of the capacitor device;

[0021] Figure 8 It is a schematic diagram of the cabinet of the capacitor device.

[0022] In the drawing: 1 ground glass tin shell group, 2 power screw, 3 grounding terminal, 4 resistor, 5 explosion-proof safety piece, 6 braided copper wire, 7 metallized polypropylene film, 8 flame-retardant soft resin glue, 9 electrode, 10 edge. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.​

[0024] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0025] Embodiment:

[0026] Please refer to Figures 1-8 The utility model provides a technical scheme:

[0027] A SH-E series oval self-healing low-voltage parallel capacitor device, including frosted tinplate shell group 1, the upper side of frosted tinplate shell group 1 is fixed with power screw 2, the left end of the upper side of frosted tinplate shell group 1 is fixed with grounding terminal 3, the inside of frosted tinplate shell group 1 is fixed with resistance 4, the lower end of power screw 2 is electrically connected with resistance 4 and explosion-proof safety sheet 5 respectively through power line, the lower end of resistance 4 is fixed with explosion-proof safety sheet 5, the lower side of explosion-proof safety sheet 5 is fixed with braided copper wire 6, the inside lower end of frosted tinplate shell group 1 is fixed with metallized polypropylene film 7, the lower end of explosion-proof safety sheet 5 is electrically connected with metallized polypropylene film 7, the side wall of metallized polypropylene film 7 is fixed with flame-retardant soft resin glue 8, and the lower end of braided copper wire 6 extends to the inside of metallized polypropylene film 7.

[0028] Metallized polypropylene film 7 includes electrode 9 and edge 10, the surface of electrode 9 is evaporated with metal, and the surface of edge 10 is not evaporated with metal.

[0029] I. The device selects the polypropylene film treated by metallization, and has the function of insulation self-bearing:

[0030] The metalized film with good voltage resistance and electric induction is selected as the medium, when the medium is damaged, the metalized electrode around the damage point is evaporated instantly, and the insulation is restored immediately, so that the capacitor restores normal and continues to operate, and the insulation self-bearing function is achieved; in order to improve the surge current resistance and electric capacity of the capacitor, the edge thickening technology is used, the bonding strength of the gold spraying layer and the metalized electrode plate is increased, the contact resistance of the gold spraying layer and the metal layer is reduced, and the self energy consumption of the capacitor is reduced;

[0031] II. The device selects the explosion-proof safety sheet to disconnect from the circuit when the service life is completed:

[0032] The shell group is attached with overpressure separation protection device, when the line or individual capacitor is abnormal, the capacitor will not be in extreme burst condition, the protection device will act immediately, the power supply is automatically cut off to prevent the occurrence of secondary disasters, when the internal pressure of the capacitor rises, the shell expands and displaces, when the displacement reaches the designed bearing degree, the copper safety sheet is broken, the external wiring terminal power supply is cut off, which plays a safe explosion-proof protection role; When a fault occurs in the medium of the capacitor, the metal electrode around the fault will evaporate immediately, thereby isolating the fault, and then the single body can continue to work normally, the shell has dry dielectric, and is packaged with vacuum resin, so there is no danger of liquid leakage and environmental pollution;

[0033] III. The device uses soft resin for vacuum filling, which has the function of safety protection:

[0034] The capacitor is composed of internally metallized polypropylene film, which is covered with flame-retardant and compressible insulating soft resin under vacuum filling and packaging. When the capacitor assembly releases large energy due to failure, the pressure and arc flame generated are absorbed by the compressible insulating material to prevent shell deformation and isolate air to eliminate possible flame, and the double-layer upper cover design can prevent and isolate disasters.

[0035] IV. The external discharge resistance of the device has the functions of low temperature rise and saving internal space:

[0036] The internal resistance is easy to cause the internal temperature rise of the capacitor to increase sharply, which has a slight harmful effect on the capacitor and causes the internal element capacity to attenuate; by moving the resistance to the external device, the internal temperature rise of the capacitor is reduced, the service life of the capacitor is increased, the dielectric loss is small, and the capacity attenuation is low.

[0037] Manufacturing process improvement:

[0038] ① Full-automatic winding, cross-section electrode processing, energizing, 100% element automatic inspection line;

[0039] ② High-precision base film of imported polypropylene material, vacuum evaporation metal film, variable thickness design of square resistance;

[0040] ③ Dry structure and material, vacuum drying process, multi-component thermosetting room temperature elastic resin packaging;

[0041] ④ Element lead woven copper wire and flame-retardant material shell, automatic welding process;

[0042] ⑤ Anti-corrosion sand capacitor shell, shell ventilation structure design matching with natural air cooling channel of capacitor element.

[0043] The capacitor is installed with the front and back and left and right intervals of 80mm, the upper and lower intervals of 100mm, and the interval between the device and the disc cabinet of 100mm.

[0044] The basic principle and main features of the present application and the advantages of the present application are shown and described above, for those skilled in the art, obviously the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, no figure mark in the claims should be regarded as limiting the claims involved.

[0045] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A SH-E series elliptical self-healing low voltage shunt capacitor device comprising a sandblasted sheet iron housing group (1), characterized in that, The upper side of the sand-brushed tin shell group (1) is fixed with a power screw (2), the left end of the upper side of the sand-brushed tin shell group (1) is fixed with a grounding terminal (3), the inside of the sand-brushed tin shell group (1) is fixed with a resistor (4), the lower end of the resistor (4) is fixed with an explosion-proof safety sheet (5), the lower side of the explosion-proof safety sheet (5) is fixed with a braided copper wire (6), the inside lower end of the sand-brushed tin shell group (1) is fixed with a metalized polypropylene film (7), and the side wall of the metalized polypropylene film (7) is fixed with a flame-retardant soft resin glue (8).

2. A SH-E series oval self-healing low voltage shunt capacitor device according to claim 1, characterized in that: The metalized polypropylene film (7) comprises an electrode (9) and a rim (10), the surface of the electrode (9) is vapor deposited with metal, and the surface of the rim (10) is not vapor deposited with metal.

3. The SH-E series oval self-healing low voltage shunt capacitor device according to claim 1, characterized in that: The lower end of the power screw (2) is electrically connected with the resistor (4) and the explosion-proof safety sheet (5) through power lines respectively.

4. The SH-E series oval self-healing low voltage shunt capacitor device according to claim 1, characterized in that: The lower end of the explosion-proof safety sheet (5) is electrically connected with the metalized polypropylene film (7).

5. The SH-E series oval self-healing low voltage shunt capacitor device according to claim 1, characterized in that: The lower end of the braided copper wire (6) extends to the inside of the metalized polypropylene film (7).

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