CN219873321U - High-voltage direct-current sealing contactor - Google Patents

Abstract

The utility model relates to a high-voltage direct current sealed contactor which comprises an outer shell, a fixed contact and a movable reed, wherein the fixed contact and the movable reed are oppositely arranged, the fixed contact is defined to be relatively arranged above the movable reed, the movable reed is relatively arranged below the fixed contact, the high-voltage direct current sealed contactor further comprises an insulating cover and an inner frame which are arranged in the outer shell, the insulating cover is arranged above the inner frame, a contact chamber is arranged below the inner frame, the movable reed is arranged in the contact chamber, the fixed contact penetrates through the insulating cover and the inner frame so that a fixed contact at the lower end of the fixed contact is also arranged in the contact chamber, and a sealing ring is fixedly arranged on the periphery of the fixed contact and between the insulating cover and the inner frame. According to the utility model, the arc extinguishing space in the contact chamber is isolated from metal parts outside the contact chamber, so that the evaporable substances generated by the movable reed in a life test or long-term use are prevented from splashing into the chamber outside the contact chamber, and the insulating property of the product is improved.

Description

High-voltage direct-current sealing contactor

Technical Field

The utility model relates to a contactor manufacturing technology, in particular to a sealing structure of a contact chamber of a high-voltage direct current sealing contactor.

Background

The contactor is an automatic control electric appliance, which uses a coil to flow current to generate a magnetic field so as to close a contact to control a load. A high-voltage direct current sealed contactor in the prior art comprises a contact chamber for accommodating a movable reed and a fixed contact, an insulating cover and a yoke cylinder are covered outside the contact chamber, and a contactor outer shell is covered outside the insulating cover and the yoke cylinder again to form a multi-layer sealing structure. The high-voltage direct current sealing contactor with the structure has particularly important sealing performance of the contact chamber, for example, if the sealing performance of the contact chamber is poor after the contactor is subjected to life test or long-term use, the evaporant of the movable reed in the contact chamber is easy to overflow and splash into the inner cavity of the whole contactor outer shell, the inner cavity of the contactor outer shell is provided with more metal parts, and the insulating performance of a product is easy to lose after the metal parts are contacted with the evaporant of the movable reed.

Disclosure of Invention

Therefore, in order to solve the problems, the utility model provides a high-voltage direct-current sealing contactor with optimized structure.

The utility model is realized by adopting the following technical scheme:

the utility model provides a high-voltage direct current sealed contactor which comprises an outer shell, a fixed contact and a movable reed, wherein the fixed contact and the movable reed are oppositely arranged, the fixed contact is defined to be relatively arranged above the movable reed, the movable reed is relatively arranged below the fixed contact, the contactor further comprises an insulating cover and an inner frame which are arranged in the outer shell, the insulating cover is arranged above the inner frame, a contact chamber is arranged below the inner frame, the movable reed is arranged in the contact chamber, the fixed contact penetrates through the insulating cover and the inner frame so that the fixed contact at the lower end of the fixed contact is also arranged in the contact chamber, and a sealing ring is fixedly arranged on the periphery of the fixed contact and between the insulating cover and the inner frame.

In one embodiment, a first protruding lip which surrounds the static contact in a ring shape is fixedly arranged at the edge position of the upper end of the inner frame, a second protruding lip which surrounds a part of the first protruding lip which is positioned on the inner side is arranged on the inner side of the first protruding lip, and a mounting groove for mounting the sealing ring is formed between the first protruding lip and the second protruding lip.

Wherein, in one embodiment, the first lip is in an "O" type structure, and the second lip is in a "C" type structure, so that the mounting groove therebetween is also in a "C" type structure.

Wherein, in one embodiment, the sealing ring is higher than the mounting groove.

In one embodiment, the insulating cover comprises a cover top arranged right above the inner frame and a cover cylinder extending downwards from the cover top edge, the cover cylinder is arranged around the outer periphery of the inner frame, and the outer side end of the sealing ring arranged in the mounting groove is positioned at the edge position of the upper end of the inner frame and clamped between the first convex lip and the cover cylinder.

Wherein, in one embodiment, the sealing ring is interference fit in the gap between the cover top and the inner frame.

In one embodiment, the outer side end and the inner side end of the first convex lip are respectively provided with an arc section which is partially convex outwards.

Wherein, in an embodiment, the first protruding lip and sealing washer are the uneven flat shape of radial dimension to increase the radial maximum size of mounting groove, the inner frame is used for forming the chamber wall outer wall of contact cavity with the outer wall parallel and level of mounting groove.

In one embodiment, the cross section of the sealing ring is square, and the mounting groove is a square groove.

Wherein in one embodiment, further comprising an insulating base installed inside the outer case, the inner frame and the insulating base are coupled in an up-down direction to constitute the contact chamber.

The utility model has the following beneficial effects: according to the utility model, the sealing rings are fixedly arranged on the periphery of the static contact and between the insulating cover and the inner frame, and the upper end and the lower end of each sealing ring are respectively abutted against the insulating cover and the inner frame to form sealing, so that the sealing connection of the joint of the insulating cover and the inner frame is formed, the sealing performance of the contact chamber is improved, the arc extinguishing space in the contact chamber and metal parts outside the contact chamber are isolated, the evapotranspiration generated by the movable reed in a life test or long-term use is prevented from splashing into the chamber outside the contact chamber, and the insulating performance of a product is improved.

Drawings

FIG. 1 is a schematic diagram of a high voltage DC sealed contactor (outer housing not shown) in an embodiment;

FIG. 2 is a cross-sectional view of a HVDC sealed contactor (outer housing not shown) in an embodiment;

FIG. 3 is an enlarged view of a portion of FIG. 2 at M;

FIG. 4 is a schematic view of an assembly of an inner frame and a seal ring in an embodiment;

fig. 5 is a schematic perspective view of an inner frame in an embodiment;

FIG. 6 is a side view of the inner frame in an embodiment;

fig. 7 is a schematic perspective view of a seal ring in an embodiment.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 1-3, as a preferred embodiment of the present utility model, there is provided a high voltage dc sealed contactor, which includes a fixed contact 3 and a movable contact spring 2 for realizing on or off of a contactor loop, wherein the fixed contact 3 and the movable contact spring 2 are oppositely disposed, and for convenience of description, the embodiment defines that the fixed contact 3 is oppositely disposed above the movable contact spring 2, and the movable contact spring 2 is oppositely disposed below the fixed contact 3. The contactor comprises a yoke 1 and an insulating cover 4 (the insulating cover 4 is generally made of ceramic material), the insulating cover 4 and the yoke 1 are vertically opposite and are welded through a frame piece 10 to form a containing cavity, an outer shell (not shown in the figure) of the contactor is arranged outside the yoke 1 and the insulating cover 4, a contact cavity for containing the movable reed 2 and the static contact of the static contact 3 is arranged in the insulating cover 4 and the yoke 1, and the contact cavity is also used as an arc extinguishing cavity. Specifically, an inner frame 6 (typically, a plastic frame made of plastic) and an insulating base 5 are fixedly provided in the insulating cover 4 and the yoke 1, the inner frame 6 and the insulating base 5 are joined in the up-down direction to form a contact chamber 9, the insulating cover 4 is arranged above the inner frame 6, the movable reed 2 is arranged in the contact chamber 9, and the stationary contact 3 passes through the insulating cover 4 and the inner frame 6 from top to bottom so that the lower stationary contact of the stationary contact 3 is also arranged in the contact chamber 9.

In particular, a sealing ring 7 is fixedly arranged on the periphery of the fixed contact 3 between the insulating cover 4 and the inner frame 6, and the upper end and the lower end of the sealing ring 7 are respectively abutted against the insulating cover 4 and the inner frame 6 to form sealing, so that sealing connection of the joint of the insulating cover 4 and the inner frame 6 is formed, the sealing performance of the contact chamber 9 is improved, and the fact that the evaporable substances generated by the movable reed 2 in a life test or long-term use cannot splash into a cavity outside the contact chamber 9 is ensured. Referring specifically to fig. 4 and 5, a first lip 61 that surrounds the stationary contact 3 in a ring shape is fixedly provided at the edge position of the upper end of the inner frame 6, a second lip 62 that surrounds a portion of the first lip 61 that is located inside is provided inside the first lip 61, and a mounting groove 8 for mounting the seal ring 7 is formed between the first lip 61 and the second lip 62. In this embodiment, the first lip 61 has a continuous, closed "O" shape, and the second lip 62 has a "C" shape, so that the mounting groove 8 therebetween has a "C" shape. Referring to fig. 1 and 3, the insulating cover 4 includes a cover top 41 disposed right above the inner frame 6 and a cover tube 42 extending downward from the edge of the cover top 41, the cover tube 42 is disposed around the outer periphery of the inner frame 6, the inner side portion of the seal ring 7 mounted in the mounting groove is clamped between the first lip 61 and the second lip 62, the seal ring 7 is interference fit in the gap between the cover top 41 and the inner frame 6, the gap between the cover top 41 and the mounting groove 8 is filled, the outer side end of the seal ring 7 is located at the edge position of the upper end of the inner frame 6 and clamped between the first lip 61 and the cover tube 42, by such arrangement, the tightness and reliability of the connection of the seal ring 7 with the insulating cover 4 and the inner frame 6 can be ensured, and the mounting groove can also play a role in positioning the seal ring 7.

In this embodiment, the radial dimension of the first lip 61 is non-uniform, and the first lip 61 is flat shaped like a rectangle or an ellipse, which causes the radial maximum dimension of the mounting groove 8 to be elongated, and the seal ring 7 is also flat shaped instead of a conventional ring shape having uniform radial dimension to fit the shape of the mounting groove 8. As shown in fig. 6, the outer wall of the cavity wall 63 of the inner frame 6 body, which is used for forming the contact chamber 9, is designed to be flush with the outer wall 81 of the mounting groove 8, so that when the sealing ring 7 receives the downward pressure of the insulating cover 4, the cavity wall 63 of the inner frame 6 body can play a certain supporting role, and stress extrusion rupture of the inner frame 6 is avoided. While the present embodiment has the first lip 61 flattened so that the radial maximum dimension of the mounting groove 8 is elongated, so that the inner cavity space of the inner frame 6 body is enlarged, and the arc extinguishing space is increased. In addition, as shown in fig. 3 and 7, the cross section of the sealing ring 7 in the embodiment is square, instead of the round shape of the conventional sealing ring, the sealing ring 7 with the structure is not easy to rebound, can be more closely matched in the mounting groove 8, and improves the sealing performance, thereby increasing the arc extinguishing space as much as possible.

In this embodiment, the sealing ring 7 is higher than the mounting groove 8, so that it can be pressed downward by the insulating cover 4, and sealing performance is improved.

As shown in fig. 5, the outer end and the inner end of the first lip 61 are respectively provided with arc sections 71 and 72 protruding outwards partially to form a local abdication structure of a component (such as a contactor coil outgoing end) penetrating out of the inner frame 6, so that the assembly space of other components is avoided.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a high-voltage direct current sealed contactor, includes shell body, static contact and movable contact spring set up relatively, define the static contact is located the top of movable contact spring relatively, then the movable contact spring locates the below of static contact relatively, its characterized in that: the movable contact spring is arranged in the contact cavity, the fixed contact penetrates through the insulating cover and the inner frame so that the lower-end fixed contact of the fixed contact is also arranged in the contact cavity, and a sealing ring is fixedly arranged on the periphery of the fixed contact and between the insulating cover and the inner frame.

2. The high voltage dc sealed contactor according to claim 1, wherein: the edge position of the upper end of the inner frame is fixedly provided with a first convex lip which surrounds the fixed contact in a ring shape, the inner side of the first convex lip is provided with a second convex lip which surrounds a part of the inner side of the first convex lip, and a mounting groove for mounting the sealing ring is formed between the first convex lip and the second convex lip.

3. The high voltage dc sealed contactor according to claim 2, wherein: the first protruding lip is of an O-shaped structure, and the second protruding lip is of a C-shaped structure, so that the mounting groove between the first protruding lip and the second protruding lip is of the C-shaped structure.

4. The high voltage dc sealed contactor according to claim 2, wherein: the sealing ring is higher than the mounting groove.

5. The high voltage dc sealed contactor according to claim 2, wherein: the insulating cover comprises a cover top arranged right above the inner frame and a cover cylinder extending downwards from the edge of the cover top, the cover cylinder is arranged on the periphery of the inner frame in a surrounding mode, the outer side end of the sealing ring arranged in the mounting groove is located at the edge position of the upper end of the inner frame, and the sealing ring is clamped between the first protruding lip and the cover cylinder.

6. The high voltage dc sealed contactor according to claim 5, wherein: the sealing ring is in interference fit in a gap between the cover top and the inner frame.

7. The high voltage dc sealed contactor according to claim 2, wherein: the outer side end and the inner side end of the first convex lip are respectively provided with an arc section which is partially convex outwards.

8. The high voltage dc sealed contactor according to claim 2, wherein: the first protruding lip and the sealing ring are flat shapes with uneven radial sizes so as to increase the radial maximum size of the mounting groove, and the inner frame is used for forming the outer wall of the cavity wall of the contact cavity to be flush with the outer wall of the mounting groove.

9. The high voltage dc sealed contactor according to claim 8, wherein: the cross section of the sealing ring is square, and the mounting groove is a square groove.

10. The high voltage dc sealed contactor according to claim 1, wherein: the inner frame and the insulating base are jointed in the up-down direction to form the contact chamber.