CN215988586U - Power isolating switch with overheat protection - Google Patents

Abstract

The utility model discloses an electric power isolating switch with overheat protection, which comprises a bottom plate, a first insulator, a second insulator, a wire inlet plate, a wire outlet plate, a first U-shaped frame, a fixed shaft, a knife switch, a second U-shaped frame and a contact blade, wherein the first insulator is arranged on the bottom plate; first insulator and second insulator symmetry are installed in the upper surface of bottom plate, the upper surface of first insulator is fixed in to the incoming line board, and the line board is fixed in the upper surface of second insulator, first U type frame is connected with the upper end of incoming line board, and its fixed axle through its inside fixed connection rotates with plug-in strip one end to be connected, and second U type frame is connected with the upper end of line board, the installation in second U type frame both sides of contact piece symmetry, the other end of plug-in strip laminates with the surface of two contact pieces respectively in the inside of second U type frame and its both sides wall. The utility model can avoid the overheating condition caused by poor contact between the contact blade and the switch blade, and replaces the hand to pull the switch blade to close when the temperature is too high.

Description

Power isolating switch with overheat protection

Technical Field

The utility model relates to the technical field of power isolating switches, in particular to a power isolating switch with overheat protection.

Background

The isolating switch is an electrical appliance which is used most in high-voltage switching electrical appliances, the working principle and the structure of the isolating switch are simple, but the isolating switch has the main characteristics of no arc extinguishing capability and can only be used for switching on and off a circuit under the condition of no load current due to large using amount and high requirement on working reliability, and the influence on the design, the establishment and the safe operation of a substation and a power plant is large, and the existing isolating switch has the following problems in the using process:

1. the existing isolating switch is used in severe weather such as strong wind, the stress of a static contact and a moving contact is changed due to serious line swing, the contact resistance is increased and overheated due to pressure imbalance, the contact in contact with a knife switch is abraded due to frequent opening and closing of the isolating switch, the attraction is influenced, and the temperature is overheated due to poor contact.

2. Common isolator is lacking the overheat protection structure, can not in time pull open the plug-in strip when the overheated condition appears for switch and power line are easily because of the overheated impaired.

Disclosure of Invention

The utility model aims to provide a power isolating switch with overheat protection, which solves the problems that the common isolating switch mentioned in the background art is overheated due to poor contact and does not have the overheat protection function after being used for a long time.

The technical scheme for realizing the purpose of the utility model is as follows: an electric power isolating switch with overheat protection comprises a base plate, a first insulator, a second insulator, a wire inlet plate, a wire outlet plate, a first U-shaped frame, a fixed shaft, a knife switch, a second U-shaped frame and a contact blade; first insulator and second insulator symmetry are installed in the upper surface of bottom plate, the upper surface of first insulator is fixed in to the incoming line board, and the line board is fixed in the upper surface of second insulator, first U type frame is connected with the upper end of incoming line board, and its fixed axle through its inside fixed connection rotates with plug-in strip one end to be connected, and second U type frame is connected with the upper end of line board, the installation in second U type frame both sides of contact piece symmetry, the other end of plug-in strip laminates with the surface of two contact pieces respectively in the inside of second U type frame and its both sides wall.

Furthermore, the lower ends of all the blades are connected with an adjusting mechanism for adjusting the position of the blades.

Furthermore, the adjusting mechanism comprises a motor, a wire coil, an insulating wire, an insulating plate, an insulating connecting ring, a jacking mechanism and a temperature sensor; the motor is fixedly installed on the lower surface of the bottom plate, a driving shaft of the motor is connected with the wire coil, the insulating wire is wound on the wire coil, the insulating plate is connected with the lower ends of all the switch blades, the insulating connecting ring is installed at the middle position of the lower surface of the insulating plate, a through hole is formed in the position, corresponding to the insulating connecting ring, of the bottom plate, one end of the insulating wire penetrates through the through hole, extends to the upper portion of the insulating wire and is connected with the insulating connecting ring, the jacking mechanisms are symmetrically installed on the bottom plate on two sides of the through hole, the insulating plate can be jacked up, and the temperature sensor is installed on the outer side, back to the switch blades, of the second U-shaped frame.

Further, jack-up mechanism is including fixing the sleeve at the bottom plate upper surface, telescopic inside slip cover is equipped with the slide, the lower fixed surface of slide is connected with second reset spring, second reset spring's lower fixed surface is on the bottom plate, the upper end fixed mounting of slide has the ejector pin, the upper end fixedly connected with insulating roof of ejector pin, the upper surface of insulating roof is laminated with the lower surface of insulation board mutually.

Furthermore, a sliding groove is formed in the inner side wall of the sleeve, and a convex block in sliding fit with the sliding groove is arranged on the outer side wall of the sliding plate.

Furthermore, one end of the contact blade, which faces away from the contact blade, is fixedly connected with two vertically aligned guide rods, one end of each guide rod penetrates through the second U-shaped frame and extends to the outer side of the second U-shaped frame, a baffle is fixedly connected with the end of each guide rod, the two guide rods are connected with each other at the same side through the baffle, a first return spring is sleeved on each guide rod, one end of each first return spring is fixedly connected with the second U-shaped frame, and one end of the other end of each first return spring is connected with the baffle.

Furthermore, the outer sides of the first insulator and the second insulator are both sleeved with diamond-shaped covers.

Further, the both ends of bottom plate equal fixedly connected with L template, all seted up the mounting hole on the L template.

Compared with the prior art, the utility model has the following remarkable effects:

(1) according to the utility model, the first U-shaped frame and the second U-shaped frame which are respectively arranged on the wire inlet plate and the wire outlet plate are connected through the knife switch, and the knife switch is conveniently inserted between the two contact blades and is tightly attached to the two contact blades by utilizing the two contact blades of which the upper ends are provided with the arc surfaces, so that the contact area of the knife switch and the contact blades is larger, and the contact position is not easy to overheat due to poor contact;

(2) according to the utility model, the guide rod, the baffle and the first return spring are arranged, so that the two contact blades clamping two ends of the switch blade always have the trend of moving towards the switch blade direction, the contact between the contact blades and the switch blade cannot be influenced even if the contact blades are worn, and the overheating condition caused by poor contact between the contact blades and the switch blade is avoided;

(3) according to the utility model, the motor, the wire coil, the insulating wire and the insulating plate are arranged, so that a user can pull the switch blade to be closed, the jack-up mechanism can separate the switch blade from the contact blade through the arrangement of the jack-up mechanism when the motor rotates reversely to release the insulating wire on the wire coil, and the motor is started to rotate reversely through the arrangement of the temperature sensor when the temperature sensor senses that the temperature on the second U-shaped frame is too high, so that the insulating wire is released, and the jack-up mechanism can cut off the switch at the moment to avoid the overheating damage of the switch.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of another embodiment of the present invention.

Fig. 3 is a schematic view of a third perspective structure according to the present invention.

FIG. 4 is a schematic view of the structure at A in FIG. 1 according to the present invention.

FIG. 5 is a cross-sectional view of the jacking mechanism of the present invention.

In the figure: 1. a base plate; 2. a first insulator; 3. a second insulator; 4. a wire inlet plate; 5. a wire outlet plate; 6. a first U-shaped frame; 7. a fixed shaft; 8. a knife switch; 9. a second U-shaped frame; 10. a contact blade; 11. a guide bar; 12. a baffle plate; 13. a first return spring; 14. a motor; 15. wire coils; 16. an insulated wire; 17. an insulating plate; 18. an insulating connecting ring; 19. a through hole; 20. a jack-up mechanism; 2001. a sleeve; 2002. a slide plate; 2003. a chute; 2004. a bump; 2005. a second return spring; 2006. a top rod; 2007. an insulating top plate; 21. a temperature sensor; 22. a rhombic cover; 23. an L-shaped plate; 24. and (7) installing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2 and 3, an electric power isolating switch with overheat protection according to an embodiment of the present invention includes a bottom plate 1, two rows of first insulators 2 and second insulators 3 which are symmetrical to each other are disposed on an upper surface of the bottom plate 1, a wire incoming plate 4 is fixedly mounted on the upper surface of the first insulator 2, a wire outgoing plate 5 is fixedly mounted on the upper surface of the second insulator 3, a first U-shaped frame 6 is connected to an upper end of the wire incoming plate 4, a knife switch 8 is rotatably connected to the first U-shaped frame 6 through a fixed shaft 7 fixedly connected inside the first U-shaped frame 6, a second U-shaped frame 9 is connected to the upper surface of the wire outgoing plate 5, two contact blades 10 which are symmetrical to each other are disposed inside the second U-shaped frame 9, one end of the knife switch 8 far away from the first U-shaped frame 6 is inserted into the second U-shaped frame 9, and two side walls of the knife switch are respectively attached to surfaces of the two contact blades 10, a motor 14 is fixedly mounted on a lower surface of the bottom plate 1, the wire coil 15 is fixedly arranged on the driving shaft of the motor 14, the insulating wire 16 is connected on the wire coil 15, the lower ends of all the switch blades 8 are connected through the insulating plate 17, the insulating connecting ring 18 is fixedly arranged at the middle position of the lower surface of the insulating plate 17, one end of the insulating wire 16 extends to the upper part of the insulating wire through the through hole 19 arranged on the bottom plate 1 and is connected with the insulating connecting ring 18, the jacking mechanisms 20 for jacking the insulating plate 17 are symmetrically arranged at the two sides of the upper surface of the bottom plate 1, and the temperature sensor 21 is fixedly arranged at one side of the second U-shaped frame 9, which is opposite to the switch blades 8, the position that is difficult for leading to the contact because of the poor reason of contact is overheated, through the setting of temperature-sensing ware 21, when the temperature of second U type frame 9 was too high, can start motor 14, makes drum 15 drive insulated wire 16 relax to make jack-up mechanism 20 can be with the insulating board 17 of connecting a plurality of plug blades 8 upwards jack-up, thereby make plug blades 8 and two contact blades 10 separation, play protection circuit and isolator's effect.

As shown in fig. 4, in some embodiments, two ends of the two contact blades 10 facing away from each other are fixedly connected with two vertically aligned guide rods 11, one end of each guide rod 11 extends to the outside of the second U-shaped frame 9 through the second U-shaped frame, one end of each guide rod 11 on the same side is connected with the baffle 12 through the baffle 12, and the first return springs 13 with one ends connected with the baffle 12 are sleeved on the guide rods 11, the baffles 12 and the first return springs 13, so that the two contact blades 10 have a tendency of moving towards each other, and therefore poor contact is not easily caused by abrasion of contact positions of the contact blades 10 and the switch blade 8.

As shown in fig. 5, in some embodiments, the jacking mechanism 20 includes a sleeve 2001 fixed on the upper surface of the bottom plate 1, a sliding plate 2002 is slidably sleeved inside the sleeve 2001, a second return spring 2005 is fixedly connected to the lower surface of the sliding plate 2002, the lower surface of the second return spring 2005 is fixed on the bottom plate 1, a push rod 2006 is fixedly mounted at the upper end of the sliding plate 2002, an insulating top plate 2007 is fixedly connected to the upper end of the push rod 2006, the upper surface of the insulating top plate 2007 is attached to the lower surface of the insulating plate 17, and through the arrangement of the sleeve 2001, the sliding plate 2002, the second return spring 2005, the push rod 2006 and the insulating top plate 2007, when the insulating wire 16 is loosened, the insulating top plate 2007 jacks up the insulating plate 17 to separate the knife switch 8 from the contact blade 10.

As shown in fig. 5, in some embodiments, the inner side wall of the sleeve 2001 is provided with a sliding groove 2003, the outer side wall of the sliding plate 2002 is provided with a projection 2004 slidably fitted with the sliding groove 2003, and the sliding plate 2002 cannot rotate in the sleeve 2001 due to the arrangement of the sliding groove 2003 and the projection 2004.

As shown in fig. 1, in some embodiments, the diamond-shaped cover 22 is sleeved on the outer sides of the first insulator 2 and the second insulator 3, and the first insulator 2 and the second insulator 3 can be protected by the diamond-shaped cover 22.

As shown in fig. 3, in some embodiments, both ends of the bottom plate 1 are fixedly connected with L-shaped plates 23, mounting holes 24 are formed in the L-shaped plates 23, the damage of the motor 14 is avoided by arranging the L-shaped plates 23, and the isolation switch is conveniently fixed by arranging the mounting holes 24.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A power disconnector with overheat protection, comprising a base plate (1), characterized in that: the insulation device also comprises a first insulator (2), a second insulator (3), a wire inlet plate (4), a wire outlet plate (5), a first U-shaped frame (6), a fixed shaft (7), a knife switch (8), a second U-shaped frame (9) and a contact blade (10); first insulator (2) and second insulator (3) symmetry are installed in the upper surface of bottom plate (1), line incoming plate (4) are fixed in the upper surface of first insulator (2), and line outgoing plate (5) are fixed in the upper surface of second insulator (3), first U type frame (6) are connected with the upper end of line incoming plate (4), and its fixed axle (7) through its inside fixed connection rotates with plug-in strip (8) one end to be connected, and second U type frame (9) are connected with the upper end of line outgoing plate (5), the installation in second U type frame (9) both sides of contact piece (10) symmetry, the other end of plug-in strip (8) is laminated with the surface of two contact pieces (10) respectively in the inside of second U type frame (9) and its both sides wall.

2. A power disconnect switch with over-temperature protection as defined in claim 1, wherein: the lower ends of all the switch blades (8) are connected with an adjusting mechanism for adjusting the position of the switch blades (8).

3. A power disconnect switch with over-temperature protection as defined in claim 2, wherein: the adjusting mechanism comprises a motor (14), a wire coil (15), an insulated wire (16), an insulating plate (17), an insulating connecting ring (18), a jacking mechanism (20) and a temperature sensor (21); the motor (14) is fixedly installed on the lower surface of the bottom plate (1), a driving shaft of the motor is connected with the wire coil (15), the insulating wire (16) is wound on the wire coil (15), the insulating plate (17) is connected with the lower ends of all the switch blades (8), the insulating connecting ring (18) is installed at the middle position of the lower surface of the insulating plate (17), a through hole (19) is formed in the position, corresponding to the insulating connecting ring (18), of the bottom plate (1), one end of the insulating wire (16) penetrates through the through hole (19) to extend to the upper side of the insulating wire and is connected with the insulating connecting ring (18), the jacking mechanism (20) is symmetrically installed on the bottom plate (1) on the two sides of the through hole (19) and can jack up the insulating plate (17), and the temperature sensor (21) is installed on the outer side, opposite to the switch blades (8), of the second U-shaped frame (9).

4. A power disconnect switch with over-temperature protection as defined in claim 3, wherein: the jacking mechanism (20) comprises a sleeve (2001) fixed on the upper surface of the bottom plate (1), a sliding plate (2002) is slidably sleeved in the sleeve (2001), a second return spring (2005) is fixedly connected to the lower surface of the sliding plate (2002), the lower surface of the second return spring (2005) is fixed on the bottom plate (1), a push rod (2006) is fixedly mounted at the upper end of the sliding plate (2002), an insulating top plate (2007) is fixedly connected to the upper end of the push rod (2006), and the upper surface of the insulating top plate (2007) is attached to the lower surface of the insulating plate (17).

5. The power isolating switch with overheat protection as claimed in claim 4, wherein: the inner side wall of the sleeve (2001) is provided with a sliding groove (2003), and the outer side wall of the sliding plate (2002) is provided with a convex block (2004) which is in sliding fit with the sliding groove (2003).

6. A power disconnect switch with over-temperature protection as defined in claim 1, wherein: the back end of the contact blade (10) is fixedly connected with two vertically aligned guide rods (11), one end of each guide rod (11) penetrates through the second U-shaped frame (9) and extends to the outer side of the second U-shaped frame, a baffle (12) is fixedly connected with the end of each guide rod (11), the end of each guide rod (11) on the same side is connected with the baffle (12), a first return spring (13) is sleeved on each guide rod (11), one end of each first return spring (13) is fixedly connected with the second U-shaped frame (9), and one end of the other end of each first return spring is connected with the baffle (12).

7. A power disconnect switch with over-temperature protection as defined in claim 1, wherein: the outer sides of the first insulator (2) and the second insulator (3) are both sleeved with a rhombic cover (22).

8. A power disconnect switch with over-temperature protection as defined in any one of claims 1-7, wherein: the two ends of the bottom plate (1) are fixedly connected with L-shaped plates (23), and mounting holes (24) are formed in the L-shaped plates (23).

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