CN216928385U - Vacuum relay - Google Patents
Vacuum relay Download PDFInfo
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- CN216928385U CN216928385U CN202220446525.8U CN202220446525U CN216928385U CN 216928385 U CN216928385 U CN 216928385U CN 202220446525 U CN202220446525 U CN 202220446525U CN 216928385 U CN216928385 U CN 216928385U
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- vacuum
- connecting lever
- transmission connecting
- vacuum arc
- extinguishing chamber
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Abstract
The utility model belongs to the technical field of relays and discloses a vacuum relay. The vacuum relay comprises an operating mechanism, a solid-sealed pole and a transmission connecting lever, wherein the operating mechanism comprises a coil and a movable iron core, and the movable iron core can move left and right through excitation of the coil; the solid-sealed polar pole comprises a casting insulating shell and a vacuum arc-extinguishing chamber, the casting insulating shell is provided with a containing cavity, the vacuum arc-extinguishing chamber is arranged in the containing cavity, a rotary groove is arranged on the cavity wall of the containing cavity, and an operating mechanism is arranged above the solid-sealed polar pole; one end of the transmission connecting lever abuts against the rotary groove, the other end of the insulation connecting lever is connected with the movable iron core, the operating mechanism is configured to drive the transmission connecting lever, one end of the transmission connecting lever rotates in the rotary groove, the transmission connecting lever is in compression joint with the vacuum arc extinguish chamber, and the transmission connecting lever can control the vacuum arc extinguish chamber to perform switching-on or switching-off actions when rotating in the rotary groove. The vacuum relay is used for a medium-voltage electrical system, and has the advantages of simple structure, convenience in installation and reliability in operation.
Description
Technical Field
The utility model relates to the technical field of relays, in particular to a vacuum relay for a medium-voltage electrical system.
Background
The vacuum relay has the characteristics of high voltage resistance level, strong arc extinguishing capability and the like, and is gradually applied to modern industry in recent years, and simultaneously faces more rigorous challenges:
1. the switching voltage is high, and the switching voltage is used in a medium-voltage electrical system;
2. the insulation level is high, and the insulation capability of a medium-voltage electric appliance is achieved;
3. the rated current capacity is strong and reaches dozens of amperes;
4. the inrush current value of the contact is high and reaches several kA;
5. the short-time enduring current is large, the time is long, the peak value is several kA, and the time is not less than 1 cycle;
6. the electric service life is more than or equal to 1000 times;
7. the mechanical life is more than or equal to 10000 times.
The utility model provides a vacuum relay for a medium-voltage electrical system based on market demands, and aims to meet the market demands.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a vacuum relay which can meet the requirements of a medium-voltage electrical system and has the characteristics of simple structure, convenience in installation, high working efficiency, reliability in operation, economy, durability and the like.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a vacuum relay, comprising:
the operating mechanism comprises a coil and a movable iron core, and the movable iron core can move left and right through excitation of the coil;
the solid-sealed polar pole comprises a cast insulating shell and a vacuum arc-extinguishing chamber, wherein the cast insulating shell is provided with a containing cavity, the vacuum arc-extinguishing chamber is arranged in the containing cavity, a rotary groove is arranged on the cavity wall of the containing cavity, and the operating mechanism is arranged above the solid-sealed polar pole;
the one end butt of transmission connecting lever in the gyration inslot, the other end of transmission connecting lever with move the iron core and connect, operating mechanism is configured as can drive the transmission connecting lever makes the one end of transmission connecting lever is in the gyration inslot internal rotation, just the transmission connecting lever with the vacuum interrupter crimping, the transmission connecting lever is in can control during the gyration inslot internal rotation vacuum interrupter carries out combined floodgate or separating brake action.
Furthermore, the solid-sealed polar pole further comprises a connecting piece and a lower outgoing line, and the vacuum arc extinguish chamber is connected with the lower outgoing line through the connecting piece.
Further, the solid-sealed polar pole further comprises a copper nut, the copper nut is arranged at one end of the vacuum arc extinguish chamber, and the vacuum arc extinguish chamber is connected with the connecting piece through the copper nut.
Furthermore, the vacuum relay further comprises a brake separating spring, the brake separating spring is sleeved on the movable conducting rod of the vacuum arc extinguish chamber, one end of the brake separating spring is abutted to the transmission connecting lever, and the other end of the brake separating spring is abutted to the cover plate of the vacuum arc extinguish chamber.
Further, the vacuum relay further comprises a contact spring, the contact spring is sleeved on the movable conducting rod of the vacuum arc extinguish chamber, one end of the contact spring is abutted to the transmission connecting lever, and the other end of the contact spring is abutted to the end portion of the step of the movable conducting rod of the vacuum arc extinguish chamber.
Furthermore, the vacuum relay further comprises an upper outgoing line, and the upper outgoing line is connected with a static conducting rod of the vacuum arc-extinguishing chamber.
Further, the vacuum relay further comprises an auxiliary switch for indicating the status of the vacuum relay.
Furthermore, an umbrella skirt is arranged on the transmission connecting lever and used for increasing creepage distance.
Furthermore, the movable iron core is detachably connected with the transmission crank arm.
Further, the transmission crank arm is made of an insulating material.
The utility model has the beneficial effects that:
1) the vacuum arc-extinguishing chamber is adopted, so that the vacuum arc-extinguishing chamber has the characteristics of large capacity and high voltage resistance, and meets the requirement of high parameters;
2) the utility model adopts the solid-sealed pole structure aiming at the conductive loop, has the advantages of high insulating property and good mechanical stability, meets the requirement of high parameter, and is suitable for a medium-voltage electrical system;
3) aiming at the transmission crank arm, the novel insulating material is adopted, and the large umbrella skirt is designed, so that the novel transmission crank arm has the advantages of high insulating property and good mechanical stability, meets the requirement of high parameters, and is suitable for a medium-voltage electrical system;
4) the utility model adopts lever transmission, optimizes the output of the electromagnetic mechanism and the mechanical load requirement of the vacuum arc-extinguishing chamber, and ensures the reliability of the product on the basis of miniaturization;
5) the vacuum relay is used for a medium-voltage electrical system for the first time, has the characteristics of simple structure, convenience in installation, high working efficiency, reliability in operation, economy, durability and the like, and can be produced in batches.
Drawings
Fig. 1 is a sectional view showing a front view of a vacuum relay according to an embodiment of the present invention;
FIG. 2 is a front view of an actuator of a vacuum relay according to an embodiment of the present invention;
FIG. 3 is a right side view of a vacuum relay provided by an embodiment of the present invention;
fig. 4 is a bottom view of a vacuum relay according to an embodiment of the present invention.
In the figure:
1. an operating mechanism; 11. a magnetic yoke; 12. a stationary iron core; 13. a coil; 14. a movable iron core; 2. a transmission crank arm; 3. a housing; 4. an insulating cover plate; 5. a brake separating spring; 6. a contact spring; 7. a copper nut; 8. a connecting member; 9. solid sealing the pole; 91. an upper outgoing line; 92. pouring an insulating shell; 93. a vacuum arc-extinguishing chamber; 94. a lower outgoing line; 10. an auxiliary switch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.
The embodiment provides a vacuum relay, as shown in fig. 1-4, the vacuum relay includes an operating mechanism 1, a solid-sealed pole 9 and a transmission connecting lever 2, the operating mechanism 1 includes a coil 13 and a movable iron core 14, and the movable iron core 14 can move left and right through the excitation of the coil 13; the solid-sealed polar pole 9 comprises a casting insulation shell 92 and a vacuum arc-extinguishing chamber 93, the casting insulation shell 92 is provided with a containing cavity, the vacuum arc-extinguishing chamber 93 is arranged in the containing cavity, a rotary groove is arranged on the cavity wall of the containing cavity, and the operating mechanism 1 is arranged above the solid-sealed polar pole 9; one end of the transmission connecting lever 2 is abutted to the rotary groove, the other end of the transmission connecting lever 2 is connected with the movable iron core 14, the operating mechanism 1 is configured to drive the transmission connecting lever 2, one end of the transmission connecting lever 2 rotates in the rotary groove, the transmission connecting lever 2 is in compression joint with the vacuum arc-extinguishing chamber 93, and the transmission connecting lever 2 can control the vacuum arc-extinguishing chamber 93 to perform switching-on or switching-off actions when rotating in the rotary groove.
The vacuum arc-extinguishing chamber 93 has the characteristics of large capacity and high voltage resistance, and meets the requirement of high parameters; the structure of the solid-sealed polar pole 9 is adopted, so that the insulating property is high, the mechanical stability is good, the requirement of high parameters is met, and the solid-sealed polar pole is suitable for a medium-voltage electrical system; when the movable iron core 14 moves left and right, the transmission connecting lever 2 is driven, one end of the transmission connecting lever 2 rotates in the rotary groove, the transmission connecting lever 2 is in compression joint with the vacuum arc-extinguishing chamber 93, the vacuum arc-extinguishing chamber 93 can be controlled to perform switching-on or switching-off actions when the transmission connecting lever 2 rotates in the rotary groove, the lever transmission is adopted, the output of the operating mechanism 1 and the mechanical load requirement of the vacuum arc-extinguishing chamber 93 are optimized, and the reliability of products is guaranteed on the basis of miniaturization. The vacuum relay is used for a medium-voltage electrical system for the first time, has the characteristics of simple structure, convenience in installation, high working efficiency, reliability in operation, economy, durability and the like, can be produced in batches, and improves the practicability.
Further, the embedded pole 9 further includes a connecting member 8 and a lower outgoing line 94, and the vacuum interrupter 93 is connected to the lower outgoing line 94 through the connecting member 8. By providing the connecting member 8, the connection reliability of the vacuum interrupter 93 and the lower outgoing line 94 is improved. Preferably, the connecting element 8 is a flexible connection, which contributes to space saving.
Further, the solid-sealed polar pole 9 further comprises a copper nut 7, the copper nut 7 is arranged at one end of the vacuum arc-extinguishing chamber 93, and the vacuum arc-extinguishing chamber 93 is connected with the connecting piece 8 through the copper nut 7. The arrangement of the copper nut 7 enables the vacuum arc-extinguishing chamber 93 to be connected with the connecting piece 7, and the connection reliability is improved.
Further, the vacuum relay further includes an upper outgoing line 91, and the upper outgoing line 91 is connected with a static conductive rod of the vacuum arc-extinguishing chamber 93. By arranging the upper outlet 91, the vacuum arc-extinguishing chamber 93, the copper nut 7, the connecting piece 8 and the lower outlet 94 form a conductive loop. Optionally, the upper outgoing line 91, the vacuum interrupter 93 and the lower outgoing line 94 are sealed into a whole by a casting process. In this embodiment, a casting insulating case 92 is formed by a casting process, and the casting insulating case 92 seals the upper outgoing line 91, the vacuum interrupter 93, and the lower outgoing line 94.
Further, the vacuum relay includes a switching-off spring 5, the switching-off spring 5 is sleeved on the movable conducting rod of the vacuum arc-extinguishing chamber 93, one end of the switching-off spring 5 abuts against the transmission crank arm 2, and the other end of the switching-off spring 5 abuts against the cover plate of the vacuum arc-extinguishing chamber 93.
By arranging the opening spring 5, when the operating mechanism 1 is not electrified, the opening spring 5 provides thrust for the transmission connecting lever 2, so that the vacuum arc extinguish chamber 93 completes opening action, namely, a moving contact and a static contact of the vacuum arc extinguish chamber 93 are pulled apart and kept at a certain distance, sufficient insulation voltage is guaranteed to be borne between the moving contact and the static contact of the vacuum arc extinguish chamber, and the safe operation of the system is guaranteed.
Further, the vacuum relay includes a contact spring 6, the contact spring 6 is sleeved on the movable conducting rod of the vacuum arc-extinguishing chamber 93, one end of the contact spring 6 abuts against the transmission crank arm 2, and the other end of the contact spring 6 abuts against the end face of the step of the movable conducting rod of the vacuum arc-extinguishing chamber 63.
By arranging the contact spring 6, in the switching-on process, after the moving contact and the fixed contact of the vacuum arc-extinguishing chamber 93 are contacted, the contact spring 6 is in a compressed state under the action of the transmission crank arm 2, and overtravel is generated, so that the moving contact and the fixed contact are ensured to have enough contact pressure.
Specifically, in this embodiment, a through hole is formed in the transmission connecting lever 2, the moving conductive rod of the vacuum arc-extinguishing chamber 93 penetrates through the through hole, one side of the transmission connecting lever 2 is pressed on the opening spring 5 and the contact spring 6, and the copper nut 7 is arranged at the end of the moving conductive rod and is abutted against the other side of the transmission connecting lever 2. After the vacuum relay is electrified, the movable iron core 14 moves leftwards under the excitation of the coil 13, the movable iron core 14 drives the other end of the transmission connecting lever 2 to rotate anticlockwise in the rotary groove of the solid-sealed pole 9, the transmission connecting lever 2 drives the vacuum arc-extinguishing chamber 93 to move leftwards in the process of rotating anticlockwise, and the opening spring 5 and the contact spring 6 are compressed, so that the vacuum arc-extinguishing chamber 93 moves to the closing position from the opening position and keeps the closing state.
Further, the operating mechanism 1 further includes a yoke 11 and a stationary core 12, the stationary core 12 and the movable core 14 are disposed at an interval, and the yoke 11 is disposed outside the coil 13. The yoke 11 restricts outward diffusion of leakage flux of the coil 13, thereby improving reliability of the actuator 1.
After the vacuum relay is de-energized, under the action of the opening spring 5, the other end of the transmission connecting lever 2 rotates clockwise in the rotary groove to drive the vacuum arc-extinguishing chamber 93 to move rightwards, so that the vacuum arc-extinguishing chamber 93 moves from the closing position to the opening position and keeps the opening state. Simultaneously, the contact spring 6 is released, and the movable iron core 14 is pulled to be separated from the static iron core 12. The mechanical transmission is lever transmission, the operation reliability of the vacuum relay is improved, and the vacuum relay is simple in structure and easy to machine and manufacture. The vacuum relay provided by the utility model meets the requirements of a medium-voltage electrical system and can meet the mechanical service life of 10000 times.
The vacuum relay further comprises an auxiliary switch 10, the auxiliary switch 10 being used to indicate the status of the vacuum relay. When the vacuum arc-extinguishing chamber 93 is at the switching-on position, the moving contact and the static contact of the auxiliary switch 10 are at the switching-off and switching-off positions, which indicates that the vacuum relay is in the switching-on state; when the vacuum arc-extinguishing chamber 93 is in the opening position under the action of the opening spring 5, the transmission crank arm 2 is pressed and connected with the auxiliary switch 10 at the moment so as to close the moving contact and the static contact, namely, the vacuum relay is in the opening state. Specifically, in this embodiment, the auxiliary switch 10 is mechanically connected to the vacuum interrupter 93, and the states are reversed, so as to indicate the state of the vacuum relay according to the states of the moving contact and the stationary contact of the auxiliary switch 10.
In order to increase the creepage distance, the umbrella skirt is arranged on the transmission crank arm 2, which can be used as an insulation barrier, and the creepage distance between the movable iron core 14 and the vacuum arc-extinguishing chamber 93 is increased, so that the insulation level between the movable iron core 14 and the vacuum arc-extinguishing chamber 93 is further improved.
Further, the operating mechanism 1 and the solid-sealed polar pole 9 are arranged up and down, and lever transmission is realized through the transmission crank arm 9. According to the layout, on one hand, the overall size of the vacuum relay can be effectively reduced, on the other hand, the operation power is reduced, and the requirement of low power consumption is met.
Further, the transmission crank arm 2 is made of an insulating material. The arrangement is beneficial to processing and manufacturing.
Further, the movable iron core 14 is detachably connected with the transmission crank arm 2. The arrangement is convenient to disassemble. Preferably, the movable iron core 14 and the transmission connecting lever 2 are connected through a fastener, and the arrangement can effectively prevent the transmission connecting lever 2 from falling off from the movable iron core 14. Specifically, the fasteners may be screws, which are easy to machine and low cost. In other embodiments, one skilled in the art can set the type of fastener according to actual needs.
Further, the vacuum interrupter 93 and the transmission crank arm 2 are detachably connected. The arrangement is convenient to disassemble. Preferably, the vacuum interrupter 93 and the transmission connecting lever 2 are connected by a fastener, and the arrangement can effectively prevent the vacuum interrupter 93 from falling off from the transmission connecting lever 2. Specifically, the fasteners may be screws, which are easy to machine and low cost. In other embodiments, one skilled in the art can set the type of fastener according to actual needs.
Optionally, a housing 3 is disposed around the operating mechanism 1. Through setting up housing 3, can effectively prevent to fall into the dust or get into moisture in the operating mechanism 1, improve the operational reliability of operating mechanism 1.
Furthermore, one side of the transmission crank arm 2, which is far away from the upper outgoing line 91, is provided with an insulating cover plate 4, and the housing 3 and the pouring insulating shell 92 are both connected with the insulating cover plate 4. By the arrangement, the transmission crank arm 2 is prevented from being exposed, and the mechanical reliability of the transmission crank arm 2 is improved.
In this embodiment, the auxiliary switch 10 is disposed inside the insulating cover 4 and opposite to the operating mechanism 1. The arrangement facilitates the matching operation of the transmission crank arm 2 and the auxiliary switch 10, and improves the use convenience.
The implementation principle of the vacuum relay provided by the embodiment is as follows: when the coil 13 is electrified, the coil 13 generates a magnetic field, the movable iron core 14 moves linearly towards the direction of the static iron core 12, the movable iron core 12 drives one end of the transmission connecting lever 2 in the moving process, the other end of the insulation connecting lever 2 rotates anticlockwise in a rotary groove of the solid-sealed pole 9, and the transmission connecting lever 2 compresses the opening spring 5 and the contact spring 6 in the rotary process to drive the movable conducting rod of the vacuum arc-extinguishing chamber 93 to move, so that the movable contact and the static contact of the vacuum arc-extinguishing chamber 93 are contacted to realize closing and maintain enough contact pressure; after the coil 13 is powered off, the transmission connecting lever 2 rotates clockwise under the action of the opening spring 5 to drive the vacuum arc-extinguishing chamber 93 to move rightwards, so that the vacuum arc-extinguishing chamber 93 moves from a closing position to an opening position and keeps an opening state. Simultaneously, the contact spring 6 is released, and the movable iron core 14 is pulled to be separated from the static iron core 12.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A vacuum relay, comprising:
the operating mechanism (1), the operating mechanism (1) includes coil (13) and moves the iron core (14), move the iron core (14) and can move about through the excitation of the said coil (13);
the solid-sealed polar pole (9), the operating mechanism (1) is arranged above the solid-sealed polar pole (9), the solid-sealed polar pole (9) comprises a pouring insulating shell (92) and a vacuum arc-extinguishing chamber (93), the pouring insulating shell (92) is provided with a containing cavity, the vacuum arc-extinguishing chamber (93) is arranged in the containing cavity, and a rotary groove is arranged on the cavity wall of the containing cavity;
the device comprises a transmission connecting lever (2), one end of the transmission connecting lever (2) is abutted to the inside of a rotary groove, the other end of the transmission connecting lever (2) is connected with a movable iron core (14), an operating mechanism (1) is configured to be capable of driving the transmission connecting lever (2), so that the one end of the transmission connecting lever (2) is in the rotary groove, the transmission connecting lever (2) is in compression joint with a vacuum arc extinguish chamber (93), and the transmission connecting lever (2) can control the vacuum arc extinguish chamber (93) to perform switching-on or switching-off actions during the rotary groove rotation.
2. The vacuum relay according to claim 1, wherein the embedded pole (9) further comprises a connecting piece (8) and a lower outgoing line (94), and the vacuum arc-extinguishing chamber (93) is connected with the lower outgoing line (94) through the connecting piece (8).
3. The vacuum relay according to claim 2, wherein the embedded pole (9) further comprises a copper nut (7), the copper nut (7) is disposed at one end of the vacuum interrupter (93), and the vacuum interrupter (93) is connected to the connecting member (8) through the copper nut (7).
4. The vacuum relay according to claim 1, further comprising a switching-off spring (5), wherein the switching-off spring (5) is sleeved on the movable conducting rod of the vacuum arc-extinguishing chamber (93), one end of the switching-off spring (5) abuts against the transmission crank arm (2), and the other end of the switching-off spring (5) abuts against a cover plate of the vacuum arc-extinguishing chamber (93).
5. The vacuum relay according to claim 4, characterized in that the vacuum relay further comprises a contact spring (6), the contact spring (6) is sleeved on the movable conducting rod of the vacuum arc-extinguishing chamber (93), one end of the contact spring (6) abuts against the transmission crank arm (2), and the other end of the contact spring (6) abuts against the end surface of the step of the movable conducting rod of the vacuum arc-extinguishing chamber (93).
6. The vacuum relay according to claim 1, characterized in that the vacuum relay further comprises an upper outgoing line (91), the upper outgoing line (91) is connected with a static conductive rod of the vacuum interrupter (93).
7. The vacuum relay according to any of claims 1-6, characterized in that the vacuum relay further comprises an auxiliary switch (10), the auxiliary switch (10) being adapted to indicate the status of the vacuum relay.
8. The vacuum relay according to any of claims 1-6, characterized in that a shed is arranged on the transmission crank arm (2), said shed being used to increase creepage distance.
9. The vacuum relay according to any of claims 1-6, characterized in that the plunger (14) is detachably connected to the transmission lever (2).
10. The vacuum relay according to any of claims 1-6, characterized in that the transmission crank arm (2) is made of an insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220446525.8U CN216928385U (en) | 2022-03-03 | 2022-03-03 | Vacuum relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220446525.8U CN216928385U (en) | 2022-03-03 | 2022-03-03 | Vacuum relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216928385U true CN216928385U (en) | 2022-07-08 |
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ID=82225738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220446525.8U Active CN216928385U (en) | 2022-03-03 | 2022-03-03 | Vacuum relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216928385U (en) |
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2022
- 2022-03-03 CN CN202220446525.8U patent/CN216928385U/en active Active
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