A sealed high voltage DC relay

Abstract

The present invention discloses a sealed high-voltage DC relay, comprising a ceramic cover, two load lead-out terminals, a metal frame sheet, a yoke iron plate and a copper exhaust pipe; the two load lead-out terminals are respectively mounted on the top wall of the ceramic cover, and the top end of the metal frame sheet is fixed to the bottom end of the ceramic cover; the bottom end of the metal frame sheet is fixed to the yoke iron plate within the peripheral range of the yoke iron plate, so that the metal frame sheet forms a frame sheet cavity connected to the cavity of the ceramic cover from the top to the bottom; the frame sheet cavity also extends to the side to form a side cavity not covered by the ceramic cover, the exhaust pipe is mounted on the top wall of the side cavity of the metal frame sheet, and the bottom end of the exhaust pipe extends into the side cavity. The present invention avoids the disadvantage of poor insulation performance between the two load lead-out terminals due to the exhaust pipe being mounted on the ceramic cover, and also avoids the disadvantage of reducing the winding space of the magnetic circuit part due to the exhaust pipe being mounted in the magnetic circuit part.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a sealed high-voltage direct current relay. Background Art

[0002] A high-voltage DC relay in the prior art includes a contact part and a magnetic circuit part. The magnetic circuit part adopts a direct-acting magnetic circuit structure. The contact part is arranged at the upper part, and the magnetic circuit part is arranged at the lower part. The magnetic circuit part drives the moving spring part of the contact part to move through the push rod part. The moving spring part usually adopts a straight-type moving spring (also called a bridge-type moving spring). The load connection and disconnection are realized by the contact and separation of the straight-type moving spring and two static contact lead terminals (i.e., two load lead terminals). This high-voltage DC relay usually accommodates the moving and static contacts in the cavity of the ceramic cover. In order to accelerate the extinction of the arc, the position of the contact matching is usually evacuated and filled with inert gas for protection; in order to realize the inflatable and exhaust function of the sealed cavity part of the product, an exhaust pipe (using a copper pipe) is usually connected to the cavity part that needs to be sealed to meet the above function. In order to achieve the smallest possible volume, this type of high-voltage DC relay in the prior art is usually designed in a circular shape (i.e., the yoke iron plate, coil, etc. are circular), while the ceramic cover is roughly rectangular. There are two ways to connect the exhaust pipe of this type of high-voltage DC relay. One is to install the exhaust pipe on the ceramic cover, usually at an offset position in the middle of the line between the two load lead-out terminals, with the upper end of the exhaust pipe exposed outside the ceramic cover and the lower end of the exhaust pipe extending into the cavity of the ceramic cover. Since the exhaust pipe is made of copper material, the exhaust pipe between the two load lead-out terminals will affect the insulation distance between the two load lead-out terminals; the other is to install the exhaust pipe in the magnetic circuit part, specifically, to install the exhaust pipe at the yoke iron plate, with the lower part of the exhaust pipe at the winding window position of the coil, and the upper end of the exhaust pipe extending into the cavity of the ceramic cover above the yoke iron plate. In this way, the winding space of the magnetic circuit part becomes smaller, which affects the magnetic circuit performance of the product. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and to provide a sealed high-voltage DC relay. By improving the exhaust pipe structure, the disadvantage of poor insulation performance between two load lead terminals caused by installing the exhaust pipe on a ceramic cover and the disadvantage of smaller winding space of the magnetic circuit part caused by installing the exhaust pipe in the magnetic circuit part are avoided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a sealed high-voltage DC relay, comprising a ceramic cover, two load lead terminals, a metal frame sheet, a yoke iron plate and a copper exhaust pipe; wherein the ceramic cover is roughly rectangular, and the yoke iron plate is roughly circular; the two load lead terminals are respectively mounted on the top wall of the ceramic cover, and the bottom ends of the two load lead terminals are respectively extended into the cavity of the ceramic cover; the peripheral size of the top end of the metal frame sheet is correspondingly matched with the peripheral size of the bottom end of the ceramic cover, and the top end of the metal frame sheet Fixed to the bottom end of the ceramic cover; the bottom end of the metal frame sheet is fixed to the yoke iron plate within the peripheral range of the yoke iron plate, so that the metal frame sheet forms a frame sheet cavity connected with the cavity of the ceramic cover from the top to the bottom; the frame sheet cavity also extends to the side to form a side cavity that is not covered by the ceramic cover, the exhaust pipe is installed on the top wall of the side cavity of the metal frame sheet, and the bottom end of the exhaust pipe extends into the side cavity, so that the exhaust pipe is outside the ceramic cover and on one side of the ceramic cover.

[0005] The exhaust pipe is fixed to the top wall of the side cavity of the metal frame sheet by brazing.

[0006] The top wall of the side cavity of the metal frame sheet is provided with a through hole, the bottom end of the exhaust pipe is provided with a step facing downward, the bottom end of the exhaust pipe is inserted into the through hole of the metal frame sheet, and the step of the exhaust pipe is against the upper edge of the through hole of the metal frame sheet.

[0007] The height of the side cavity of the metal frame sheet is lower than the height of the frame sheet cavity of the metal frame sheet.

[0008] The side cavity of the metal frame sheet deviates toward one side in the frame sheet cavity in the middle area corresponding to the connection line of the two load lead-out terminals.

[0009] The top end of the metal frame sheet is provided with a first folded edge bent toward the inside of the frame, and the metal frame sheet is fixed to the bottom end of the ceramic cover through the first folded edge; the bottom end of the metal frame sheet is provided with a second folded edge bent toward the outside of the frame, and the metal frame sheet is fixed to the yoke iron plate through the second folded edge; the second folded edge surrounds the frame sheet cavity and the side cavity of the metal frame sheet.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The present invention adopts a frame sheet cavity which integrally extends to the side to form a side cavity which is not covered by the ceramic cover. The exhaust pipe is installed on the top wall of the side cavity of the metal frame sheet, and the bottom end of the exhaust pipe extends into the side cavity, so that the exhaust pipe is outside the ceramic cover and on one side of the ceramic cover. The structure of the present invention utilizes the spatial position of the yoke plate on the side of the ceramic cover when a roughly rectangular ceramic cover and a roughly circular yoke plate are matched to set a side cavity, and install an exhaust pipe at the side cavity, which will not change the volume of the original relay and continue to maintain the small volume characteristics of the original relay; since the exhaust pipe is not installed on the ceramic cover, the disadvantage of the prior art that the insulation performance between the two load lead terminals is deteriorated due to the exhaust pipe being installed on the ceramic cover is avoided; since the exhaust pipe is installed on the metal frame and is above the yoke plate, the disadvantage of the prior art that the winding space of the magnetic circuit part is reduced due to the exhaust pipe being installed in the magnetic circuit part is avoided; the structure of the present invention can not only ensure that there is an insulating space that meets the requirements between the two load lead terminals, but also maximize the winding space of the magnetic circuit part, thereby improving the magnetic circuit performance of the product.

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the sealed high-voltage DC relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the appearance of an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of the internal structure of an embodiment of the present invention;

[0015] Figure 3 It is a schematic diagram of the coordination of the ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe according to an embodiment of the present invention;

[0016] Figure 4 It is a schematic diagram of assembling a ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe according to an embodiment of the present invention;

[0017] Figure 5 This is a front view of the ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe in cooperation with each other according to an embodiment of the present invention;

[0018] Figure 6 It is a top view of the ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe in an embodiment of the present invention;

[0019] Figure 7 It is a left side view of the ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe in an embodiment of the present invention;

[0020] Figure 8It is a cross-sectional view of the ceramic cover, two load lead-out terminals, a metal frame sheet and an exhaust pipe in an embodiment of the present invention;

[0021] Fig. 9 A cross-sectional view of a part of the structure of an embodiment of the present invention;

[0022] Fig.10 A cross-sectional view of an exhaust pipe according to an embodiment of the present invention;

[0023] Fig.11 A schematic diagram of the three-dimensional structure of a metal frame sheet according to an embodiment of the present invention;

[0024] Fig.12 A front view of a metal frame sheet according to an embodiment of the present invention;

[0025] Fig.13 A top view of a metal frame sheet according to an embodiment of the present invention;

[0026] Fig.14 A right side view of a metal frame sheet according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Example

[0028] See also Figures 1 to 14 As shown, a sealed high-voltage DC relay of the present invention comprises a cover plate 1, a base 2, a ceramic cover 3, two load lead terminals 41, a dynamic spring 42, a metal frame sheet 5, a yoke iron plate 6, a copper exhaust pipe 7, a push part 8 and a coil 9; wherein the ceramic cover 3 is roughly rectangular, and the yoke iron plate 6 is roughly circular; the two load lead terminals 41 (i.e., static contact lead terminals) are respectively mounted on the top wall of the ceramic cover 3, and the bottom ends of the two load lead terminals 41 are respectively extended into the cavity of the ceramic cover and matched with the dynamic spring 42, the dynamic spring 42 is mounted on one end of the push part 8, and the other end of the push part 8 is matched with the coil; the peripheral size of the top end of the metal frame sheet 5 is The peripheral dimensions of the bottom end of the ceramic cover 3 correspond to each other, and the top end of the metal frame sheet 5 is fixed to the bottom end of the ceramic cover 3; the bottom end of the metal frame sheet 5 is fixed to the yoke iron plate 6 within the peripheral range of the yoke iron plate 6, so that the metal frame sheet 5 forms a frame sheet cavity 51 connected to the cavity of the ceramic cover from the top end to the bottom end; the frame sheet cavity 51 also extends to the side to integrally form a side cavity 52 that is not covered by the ceramic cover 3, the exhaust pipe 7 is installed on the top wall of the side cavity 52 of the metal frame sheet 5, and the bottom end of the exhaust pipe 7 extends into the side cavity 52, so that the exhaust pipe 7 is outside the ceramic cover 3 and on one side of the ceramic cover 3.

[0029] In this embodiment, the exhaust pipe 7 is fixed to the top wall of the side cavity 52 of the metal frame sheet 5 by brazing.

[0030] In this embodiment, a through hole 521 is provided on the top wall of the side cavity 52 of the metal frame sheet 5, and a step 71 with a step surface facing downward is provided on the bottom end of the exhaust pipe 7. The bottom end of the exhaust pipe 7 is inserted into the through hole 521 of the metal frame sheet 5, and the step 71 of the exhaust pipe is against the upper edge of the through hole 521 of the metal frame sheet.

[0031] In this embodiment, the height of the side cavity 52 of the metal frame sheet 5 is lower than the height of the frame sheet cavity 51 of the metal frame sheet 5 .

[0032] In this embodiment, the side cavity 52 of the metal frame sheet 5 is deviated toward one side in the frame sheet cavity 51 in the middle area corresponding to the connection line of the two load lead-out terminals.

[0033] In this embodiment, the top end of the metal frame sheet 5 is provided with a first folded edge 53 bent toward the inside of the frame, and the metal frame sheet 5 is fixed to the bottom end of the ceramic cover 3 through the first folded edge 53; the bottom end of the metal frame sheet 5 is provided with a second folded edge 54 bent toward the outside of the frame, and the metal frame sheet 5 is fixed to the yoke iron plate 6 through the second folded edge 54; the second folded edge 54 is wrapped around the frame sheet cavity 51 and the side cavity 52 of the metal frame sheet.

[0034] A sealed high-voltage DC relay of the present invention adopts a side cavity 52 which is not covered by the ceramic cover 3 and is integrally extended to the side from the frame cavity 51 of the metal frame 5. The exhaust pipe 7 is installed on the top wall of the side cavity 52 of the metal frame 5, and the bottom end of the exhaust pipe 7 extends into the side cavity 52, so that the exhaust pipe 7 is outside the ceramic cover 3 and on one side of the ceramic cover 3. The structure of the present invention utilizes the spatial position of the yoke plate on the side of the ceramic cover when the roughly rectangular ceramic cover 3 and the roughly circular yoke plate 6 are matched, and a side cavity is set, and an exhaust pipe is installed at the side cavity, which will not change the volume of the original relay and continue to maintain the small volume characteristics of the original relay; since the exhaust pipe is not installed on the ceramic cover, the disadvantage of the prior art that the insulation performance between the two load lead terminals is deteriorated due to the exhaust pipe being installed on the ceramic cover is avoided; since the exhaust pipe is installed on the metal frame and is above the yoke plate, the disadvantage of the prior art that the winding space of the magnetic circuit part is reduced due to the exhaust pipe being installed in the magnetic circuit part is avoided; the structure of the present invention can not only ensure that there is an insulating space that meets the requirements between the two load lead terminals, but also maximize the winding space of the magnetic circuit part, thereby improving the magnetic circuit performance of the product.

[0035] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sealed high-voltage DC relay, comprising a ceramic cover, two load lead terminals, a metal frame, a yoke iron plate and a copper exhaust pipe; wherein: The ceramic cover is roughly rectangular, and the yoke plate is roughly circular; the two load lead-out terminals are respectively mounted on the top wall of the ceramic cover, and the bottom ends of the two load lead-out terminals respectively extend into the cavity of the ceramic cover; the peripheral size of the top end of the metal frame sheet corresponds to the peripheral size of the bottom end of the ceramic cover, and the top end of the metal frame sheet is fixed to the bottom end of the ceramic cover; the bottom end of the metal frame sheet is fixed to the yoke plate within the peripheral range of the yoke plate, so that the metal frame sheet forms a frame sheet cavity connected to the cavity of the ceramic cover from the top to the bottom; it is characterized in that: the frame sheet cavity also extends to the side to form a side cavity that is not covered by the ceramic cover, the exhaust pipe is mounted on the top wall of the side cavity of the metal frame sheet, and the bottom end of the exhaust pipe extends into the side cavity, so that the exhaust pipe is outside the ceramic cover and on one side of the ceramic cover.

2. The sealed high voltage DC relay according to claim 1, characterized in that: The exhaust pipe is fixed to the top wall of the side cavity of the metal frame sheet by brazing.

3. The sealed high voltage DC relay according to claim 2, characterized in that: The top wall of the side cavity of the metal frame sheet is provided with a through hole, the bottom end of the exhaust pipe is provided with a step facing downward, the bottom end of the exhaust pipe is inserted into the through hole of the metal frame sheet, and the step of the exhaust pipe is against the upper edge of the through hole of the metal frame sheet.

4. The sealed high voltage DC relay according to claim 1, 2 or 3, characterized in that: The height of the side cavity of the metal frame sheet is lower than the height of the frame sheet cavity of the metal frame sheet.

5. The sealed high voltage DC relay according to claim 1, 2 or 3, characterized in that: The side cavity of the metal frame sheet deviates toward one side in the frame sheet cavity in the middle area corresponding to the connection line of the two load lead-out terminals.

6. The sealed high voltage DC relay according to claim 1, characterized in that: The top end of the metal frame sheet is provided with a first folded edge bent toward the inside of the frame, and the metal frame sheet is fixed to the bottom end of the ceramic cover through the first folded edge; the bottom end of the metal frame sheet is provided with a second folded edge bent toward the outside of the frame, and the metal frame sheet is fixed to the yoke iron plate through the second folded edge; the second folded edge surrounds the frame sheet cavity and the side cavity of the metal frame sheet.

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