CN203166745U - Pre-charging resistor protection device capable of being rapidly assembled - Google Patents

Abstract

The utility model discloses a pre-charging resistor protection device capable of being rapidly assembled. The pre-charging resistor protection device capable of being rapidly assembled comprises a box body and a foundation for fixing the box body. The pre-charging resistor protection device capable of being rapidly assembled is characterized in that the box body is spliced by six insulation plates, the insulation plates are provided with strip-shaped notches and insertion plates, width of the strip-shaped notch is greater than thickness of the insertion plate, and each insulation plate is inserted into the strip-shaped notch through the insertion plate and is fixedly connected with the adjacent insulation plate. The pre-charging resistor protection device is advantaged in that: a live-line portion of a resistor is sealed, so an electrical gap is greatly shortened, a mounting space is saved; a spliced fast assembling mounting mode above needs no punching and tapping, so mounting time is reduced; a pin is used for dead locking at a flange portion, so assembly soundness is improved, production efficiency is improved, and cost is reduced.

Description

A fast-assembled pre-charging resistor protection device

technical field

The utility model belongs to the field of high-voltage frequency converters, and in particular relates to a rapidly assembled pre-charging resistance protection device.

Background technique

High-voltage inverters are one of the most widely used devices in the traditional industrial field. In traditional high-voltage inverters, pre-charging resistors are generally used to charge the DC link when the system is powered on. After charging, the pre-charging resistors are short-circuited and cut off.

In the fault state, the pre-charging resistor has the hidden danger of bursting. In extreme cases, the pre-charging resistor bursts and the phase is in an open circuit. However, the splashed explosive fragments can easily damage other components, or cause short circuit and creepage, and the consequences are very serious.

As mentioned above, it is necessary to place the precharge resistor in an enclosed space. The usual way is to sew adjacent partitions with screws, and to punch and tap the cross section, which not only takes time and effort, but also requires a thicker insulating board, which is costly.

Utility model content

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, and provide a pre-charging resistance protection device, which can be quickly assembled and used.

The technical solution adopted by the utility model to solve the technical problem is: a fast-assembled pre-charging resistance protection device, including a box body and a base for fixing the box body, characterized in that the box body is composed of six insulating plates , the insulating board is provided with a strip notch and a plug-in plate, the width of the strip-shaped notch is greater than the thickness of the plug-in plate, and each insulating plate is inserted into the strip-shaped notch through the plug-in plate to be connected and fixed to the adjacent insulating plate.

In the utility model, the six insulating plates are a bottom plate, a cover plate, a pair of long side plates and a pair of short side plates in sequence; the bottom plate and the cover plate are arranged with strip-shaped notches parallel to the edges along the direction of the edges; the short sides The upper and lower edges of the board are equipped with inserting plates, and the left and right sides are provided with vertical strip notches close to the edges; Line opening; the upper and lower inserting plates of the long side plate and the short side plate are inserted into the strip notches on the bottom plate and the cover plate correspondingly, and the insert plates on the left and right sides of the long side plate are inserted into the strip notches on the adjacent short side plates.

In the utility model, a partition is also included, and the upper edge and the left and right edges of the partition are provided with inserting plates, and the inserting plates on the left and right sides of the dividing plate are inserted into the vertical strip-shaped notch on the surface of the long side plate; the long side plate , the inserting plates on the short side plates and the partitions are all inserted into the bar-shaped notches at the corresponding positions on the bottom plate and the cover plate.

In the utility model, the quantity of the base plates is two, and the two base plates are bonded and fixed.

In the utility model, pin holes are all provided on the plug-in plates of the upper and lower edges of the long side plate and the short side plate.

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

1. The live parts on the resistor are sealed, which greatly shortens the electrical clearance and saves installation space.

2. This type of snap-in quick combination installation method does not require drilling and tapping, which reduces the installation time.

3. Using pins to lock the board can enhance the firmness of assembly, improve production efficiency and reduce costs.

Description of drawings

Fig. 1 is a schematic diagram of the assembly structure of the utility model;

Fig. 2 is a schematic diagram of explosion of the structure of the utility model;

Fig. 3 is an enlarged view of part A in Fig. 2 .

Labeled in the figure:

1. Pre-charging resistor; 2. Box body; 21. Bottom plate; 22. Cover plate; 23. Long side plate; 24. Short side plate; 25. Partition plate; 26. Plug-in plate; 27. Strip notch; 28 , pin hole; 29, wire inlet; 3, base.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is described further.

As shown in Figures 1 and 2, a protection device for pre-charging resistor 1 in a high-voltage frequency converter, including a box body 2 and a base 3 for fixing the box body 2, the box body 2 is composed of six insulating boards, six pieces The insulation boards are a base plate 21, a cover plate 22, a pair of long side plates 23 and a pair of short side plates 24 in turn. Strip notches 27 parallel to the edges are arranged on the bottom plate 21 and the cover plate 22 along the edge direction. The upper and lower edges of the short side plate 24 are provided with inserting plates 26, and the left and right sides are provided with vertical strip notches 27 near the edge positions. All the edges of the long side plate 23 are provided with a plug-in plate 26, and a vertical strip notch 27 and three equidistantly arranged line inlets 29 are provided on its board surface, and the distance between the two notches 27 is larger than the predetermined one. The diameter of the charging resistor 1. The upper and lower inserting plates 26 of the long side plate 23 and the short side plate 24 are inserted into the corresponding bar-shaped notch 27 on the bottom plate 21 and the cover plate 22, and the inserting plates 26 on the left and right sides of the long side plate 23 are inserted into the strips of the adjacent short side plate 24. shaped notch 27.

In order to be applicable to the occasion of multiple pre-charging resistors 1, a separator 25 can also be added, and the upper edge and the left and right edges of the separator 25 are provided with inserting plates 26, and the inserting plates 26 on the left and right sides of the dividing plate 25 are inserted into the long side plates 23 in the vertical strip notch 27 on the plate. The long side plates 23 , the short side plates 24 and the inserting plates 26 on the partition plate 25 are all inserted into the bar-shaped notches 27 at corresponding positions on the bottom plate 21 and the cover plate 22 . The pre-charging resistor 1 is fixed in the space of the spacer 25 . The width of the strip-shaped notch 27 is greater than the thickness of the inserting plate 26 .

In order to improve the strength of the box body 2, the number of bottom plates 21 is two, and the two bottom plates 21 are attached and fixed. In order to improve the firmness of assembling, pin holes 28 are all offered on the inserting plates 26 of the upper and lower edges of the long side plates 23 and the short side plates 24, and pins can be placed in the pin holes 28 to prevent disengagement between the plates.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change it into an equivalent implementation of equivalent changes. example. However, any simple modifications or equivalent changes made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (5)

1. the pre-charge resistance protective device of an energy quick-assembling; the base that comprises casing and static housing; it is characterized in that: casing is pieced together insert group by six insulation boards and is become; insulation board is provided with bar shaped notch and plate; the width of bar shaped notch is greater than the thickness of plate, and each sheet insulation board inserts in the bar shaped notch with adjacent insulation board by plate and is connected and fixed.

2. a kind of pre-charge resistance protective device that can quick-assembling according to claim 1, it is characterized in that: six insulation boards are followed successively by base plate, cover plate, a pair of long side plate and a pair of short side plate;

Base plate is placed with the bar shaped notch parallel with arris with cover plate along the arris direction;

Arris arranges plate up and down in the short side plate, vertical bar shaped notch is offered near edge position in the left and right sides;

Be provided with plate on all arris of long side plate, offer vertical bar shaped notch and incoming line on its plate body;

In the bar shaped notch on the last lower plugboard of long side plate and short side plate corresponding insertion base plate and the cover plate, the plate of the long side plate left and right sides inserts in the bar shaped notch of adjacent short side plate.

3. a kind of pre-charge resistance protective device that can quick-assembling according to claim 2, it is characterized in that: also comprise dividing plate, dividing plate upper edge and left and right sides arris are provided with plate, and dividing plate left and right sides plate is inserted in the vertical bar shaped notch on the long side plate plate face; Plate on long side plate, short side plate and the dividing plate all is inserted in the bar shaped notch of corresponding position on base plate and the cover plate.

4. a kind of pre-charge resistance protective device that can quick-assembling according to claim 3, it is characterized in that: the quantity of base plate is two, two base plates are fitted fixing.

5. the pre-charge resistance protective device of a kind of energy quick-assembling according to claim 4 is characterized in that: all offer pin hole on the plate of arris about long side plate and the short side plate.

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