CN115206734A

CN115206734A - Relay with overcurrent protection

Info

Publication number: CN115206734A
Application number: CN202211112821.5A
Authority: CN
Inventors: 卢桌兴; 李毅灵; 芮执伟; 卢铭畅; 张俊峰; 刘灼光; 赵春太
Original assignee: Guangzhou Zhaoneng Co ltd
Current assignee: Guangzhou Zhaoneng Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-10-18
Anticipated expiration: 2042-09-14
Also published as: CN115206734B

Abstract

The invention relates to the technical field of relays, in particular to a relay with overcurrent protection, which comprises a relay body, wherein a device cavity is formed in the relay body, a motor is fixedly installed on one side wall of the device cavity, an output shaft of the motor penetrates through the relay body and extends to the outside of the relay body, a rotating shaft is fixedly connected to the outside of the relay body through the output shaft of the motor, a circular plate is fixedly installed on the outer side wall of the relay body, a circular cavity is formed in the circular plate, and one end of the rotating shaft penetrates through the circular plate and extends to the inside of the circular cavity. According to the invention, the air in the circular cavity is refrigerated through the semiconductor refrigerating sheet, and then the refrigerated air is introduced into the device cavity, so that the cold air can cool and refrigerate the interior of the relay body, and meanwhile, the radiating blades rotate to radiate the heat of the heating end of the semiconductor refrigerating sheet, so that the air in the circular cavity is not influenced.

Description

Relay with overcurrent protection

Technical Field

The invention relates to the technical field of relays, in particular to a relay with overcurrent protection.

Background

Overcurrent protection relay: the current better overcurrent protection relay can integrate protection, single-phase current measurement and control functions into a whole, realize data sharing and remote control with a remote host computer through an in-com interface, realize data sharing and remote control functions with the remote host computer through an in-con interface, and focus on that the protection function can be generally summarized into a phase element and a grounding element: the device has the advantages of inverse time limit overcurrent protection, short time delay protection, overcurrent protection during transformation ratio of the instantaneous current transformer, overload alarm, area interlocking and self-perfect self-checking function, and ensures that the device provides reliable protection for primary equipment.

Current patent (CN 11044444443B) an overcurrent protection relay opens fan and semiconductor refrigeration piece through external switch, and fan work drives the air and gets into ventilative inslot from the inlet port of side cap one end, and the refrigeration pipe and the semiconductor refrigeration piece through ventilative inslot cool down the air, and the air after will cooling passes through the inside that the cooling hole filtered transport to the protective housing through the dustproof net to cool down the relay body at the during operation.

Among the technical scheme of this patent, the pipe that refrigerates and semiconductor refrigeration piece not only have the refrigeration to heat simultaneously in addition, consequently the pipe that refrigerates and semiconductor refrigeration piece still can heat the air, heats and refrigerates and go on simultaneously, and the temperature of air does not have obvious reduction, just also can not lower the temperature to the relay body, and the cooling effect is poor.

For this purpose, relays with overcurrent protection are proposed.

Disclosure of Invention

The invention aims to provide a relay with overcurrent protection, wherein air in a circular cavity is refrigerated through a semiconductor refrigerating sheet, then the refrigerated air is introduced into a device cavity, the interior of a relay body can be cooled and refrigerated through cold air, and meanwhile, a radiating blade rotates to radiate the heating end of the semiconductor refrigerating sheet, so that the air in the circular cavity cannot be influenced, and the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme:

take overcurrent protection's relay, including the relay body, the device chamber has been seted up to the inside of relay body, a lateral wall fixed mounting in device chamber has the motor, the output shaft of motor runs through the relay body and extends to the outside of relay body, the output shaft of motor is in the outside fixedly connected with pivot of relay body, the lateral wall fixed mounting of relay body has the plectane, the circle chamber has been seted up to the inside of plectane, the one end of pivot runs through the plectane and extends to the inside in circle chamber, the pivot has the pole piece in the inside fixed mounting in circle chamber, the lantern ring is installed in the outside rotation of pole piece, the sliding chamber has been seted up to the top in circle chamber, the outer fringe of lantern ring articulates there is the slider, the slider slides in the inside in sliding chamber, the lateral wall symmetry fixed mounting of plectane has the semiconductor refrigeration piece, the one end of pivot runs through the plectane and extends to the outside of plectane, the one end outer fringe of pivot has a plurality of radiating vane in the equidistant fixed mounting in the outside circumference of plectane, the both sides of plectane difference fixed mounting has outlet duct and intake pipe respectively, the other end and the device chamber of outlet duct are linked together.

Preferably, the outer side wall of the circular plate is fixedly provided with an air inlet ring, the outer part of the air inlet ring is fixedly provided with a sector, and the contact surface of the semiconductor refrigeration sheet and the circular plate is coated with heat-conducting silica gel.

Preferably, the device cavity's interior diapire fixed mounting has the base, the last surface one end fixed mounting of base has the coil, the upper surface other end symmetry fixed mounting of base has the fixed plate, two the fixed plate rotates jointly and installs the fly leaf, the lower surface one end fixedly connected with spring of fly leaf, the other end of spring and the last fixed surface of base are connected.

Preferably, the lower surface of the movable plate is fixedly provided with an armature iron matched with the coil above the coil.

Preferably, a first contact is fixedly mounted at one end of the upper surface of the movable plate, a second contact matched with the first contact is fixedly mounted on an inner top wall of the device cavity above the first contact, and the second contact is electrically connected with the motor.

Preferably, the other end of the movable plate is fixedly connected with a connecting plate, the other end of the connecting plate is fixedly provided with a moving contact, a wire is fixedly connected inside the moving contact, and two ends of the wire penetrate through the moving contact and extend to the lower side of the moving contact.

Preferably, the two ends of the wire are fixedly connected with wire connectors below the movable contact, the two wire connectors are made of metal tungsten, a fixed contact is fixedly mounted on the other side wall inside the device cavity below the movable contact, a high-voltage contact is fixedly mounted on the other side wall outside the relay body, and the fixed contact is electrically connected with the high-voltage contact.

Preferably, the inner bottom wall of the device cavity is symmetrically and fixedly connected with fixed blocks above the fixed contact, a memory alloy plate is fixedly connected between the two fixed blocks together, and the memory alloy plate penetrates through the lower part of the lead.

Preferably, the upper surface bilateral symmetry of fly leaf has seted up and has rotated the groove, two the inside in rotation groove all rotates and installs first bull stick, two the other end of first bull stick all rotates and is connected with the second bull stick, two the other end of second bull stick all rotates with the interior roof in device chamber and is connected, two the equal fixedly connected with circular telegram spring in one side of first bull stick, two the other end of circular telegram spring all with the interior roof fixed connection in device chamber.

Preferably, a plurality of air outlets are formed in the lower portion of the other side wall of the outer portion of the relay body at equal intervals, and the air outlets are communicated with the device cavity.

Compared with the prior art, the invention has the beneficial effects that:

1. through the semiconductor refrigeration piece to the inside air in circle chamber refrigerate, then with the air induction device chamber after refrigerating, cold air just can cool down the refrigeration to relay body inside, and radiator vane rotates the end that heats to the semiconductor refrigeration piece simultaneously and dispels the heat for can not exert an influence to the inside air in circle chamber.

2. When the current in the lead is too large, the temperature of the lead can rise in a short time, the rising temperature reaches the deformation temperature of the memory alloy plate, the memory alloy plate can restore downwards, the moving contact is driven to move upwards and be separated from the static contact, and the device is prevented from being damaged due to the fact that the current is too large.

3. Because the voltage between the moving contact and the static contact is large, and the current is small, when the moving contact and the static contact are disconnected, electric arcs can be generated, meanwhile, the temperature rises to more than one thousand degrees, and the wire joint has the phenomenon of electric melting, so that the material of the wire joint is made of metal tungsten, the melting point of the metal tungsten is very high, the high temperature can be resisted, and the service life of the device is prolonged.

4. The relay during operation, the circular telegram spring circular telegram is contracted, the first bull stick of pulling rotates, drive the second bull stick simultaneously and rotate, contained angle between first bull stick and the second bull stick reaches 180 degrees, first bull stick and second bull stick can have the pressure of a vertical direction to the fly leaf this moment, when the relay body receives the vibration, first bull stick and second bull stick can play a stable effect to the fly leaf, prevent to vibrate the too big armature and coil that leads to parts, the unable work of relay.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a sectional view showing the internal structure of the present invention;

FIG. 5 is a view showing the operation state of the inside of the round cavity;

FIG. 6 is an enlarged view of the structure at A in FIG. 1;

fig. 7 is an enlarged view of the structure at B of fig. 4.

In the figure: the device comprises a relay body 1, a device cavity 2, a motor 3, a circular plate 4, a circular cavity 5, a rotating shaft 6, a circular block 7, a lantern ring 8, a sliding cavity 9, a sliding block 10, an air outlet pipe 11, an air inlet pipe 12, a semiconductor refrigerating sheet 13, a heat dissipation blade 14, an air inlet ring 15, a fan surface 16, a base 17, a coil 18, a fixed plate 19, a movable plate 20, a spring 21, a first contact 22, a second contact 23, a connecting plate 24, a movable contact 25, a lead 26, a lead connector 27, a static contact 28, a high-voltage contact 29, a fixed block 30, a memory alloy block 31, an armature 32, a rotating groove 33, a first rotating rod 34, a second rotating rod 35, a power-on spring 36 and an air outlet 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1 to 7, the present invention provides a relay with overcurrent protection, which has the following technical scheme:

take overcurrent protection's relay, including relay body 1, device chamber 2 has been seted up to relay body 1's inside, a lateral wall fixed mounting in device chamber 2 has motor 3, motor 3's output shaft runs through relay body 1 and extends to relay body 1's outside, motor 3's output shaft is in relay body 1's outside fixedly connected with pivot 6, relay body 1's lateral wall fixed mounting has plectane 4, round chamber 5 has been seted up to plectane 4's inside, pivot 6's one end runs through plectane 4 and extends to round chamber 5's inside, pivot 6 has round piece 7 in round chamber 5's inside fixed mounting, the lantern ring 8 is installed in the outside rotation of round piece 7, sliding chamber 9 has been seted up to round chamber 5's top, the outer fringe of lantern ring 8 articulates there is slider 10, slider 10 slides in sliding chamber 9's inside, the lateral wall symmetry fixed mounting of plectane 4 has semiconductor refrigeration piece 13, the one end of pivot 6 runs through plectane 4 and extends to round chamber 4's outside, the one end outer fringe of pivot 6 has a plurality of heat dissipation blade 14 in the equidistant fixed mounting in round chamber 4 outside circumference of plectane 4, the both sides of plectane 4 respectively fixed mounting has an outlet duct 11 and outlet duct 12, the other end and the device chamber of plectane 2 is linked together.

When the relay body 1 is electrified and starts to work, the motor 3 can be synchronously started to work, the motor 3 can drive the rotating shaft 6 to rotate when being started, the rotating shaft 6 can drive the round block 7 to do eccentric motion in the round cavity 5, the round block 7 can do eccentric motion and simultaneously drive the lantern ring 8 to do eccentric motion, when the lantern ring 8 does eccentric motion, each line forming the outer edge of the lantern ring 8 is contacted with the inner wall of the round cavity 5, therefore, when the lantern ring 8 does eccentric motion, air at one side of the round cavity 5 close to the air inlet pipe 12 can be firstly extruded to one side close to the air outlet pipe 11, when the air in the round cavity 5 is extruded into the air outlet pipe 11, the pressure in the round cavity 5 can be reduced, the external pressure is strong, new air can enter the round cavity 5 from the air inlet pipe 12 under the pressure of the atmospheric pressure, and then the process is repeated, when going on the process, semiconductor refrigeration piece 13's refrigeration end can refrigerate round cavity 5, make the inside air in round cavity 5 become the cold air, lantern ring 8 squeezes these into outlet duct 11 by the cold air of cooling in, the inside in device chamber 2 is imported into again, these cold air can be to the inside processing of cooling of device chamber 2, make relay body 1 can not rise at the during operation temperature, the normal work of relay body 1 has been guaranteed, when semiconductor refrigeration piece 13 refrigerates the air, pivot 6 drives a plurality of radiating vane 14 and rotates, refrigerate the heating end of semiconductor piece 13 and dispel the heat, make the temperature of the cooling end of refrigeration semiconductor piece 13 can reach refrigerated purpose, also prevent the influence of the heat of heating end to round cavity 5 inside air.

Referring to fig. 1, 3 and 4, as an embodiment of the present invention, an air inlet ring 15 is fixedly mounted on an outer side wall of a circular plate 4, a fan surface 16 is fixedly mounted on an outer portion of the air inlet ring 15, and a contact surface of a semiconductor refrigeration sheet 13 and the circular plate 4 is coated with a heat conductive silicone.

When the air inlet ring 15 rotates at the cooling fin 14, air can get into the rear of cooling fin 14 from the air inlet ring 15, then is taken out by cooling fin 14, and the air constantly forms the circulation, and the heat of the heating end of semiconductor refrigeration piece 13 is taken away to the air, and heat conduction silica gel has high thermal conductivity, splendid heat conductivity for the refrigeration efficiency of semiconductor refrigeration piece 13 refrigeration end to the inside air of round cavity 5 is higher better.

Referring to fig. 1 and 4, as an embodiment of the present invention, a base 17 is fixedly installed on an inner bottom wall of a device cavity 2, a coil 18 is fixedly installed at one end of an upper surface of the base 17, fixed plates 19 are symmetrically and fixedly installed at the other end of the upper surface of the base 17, a movable plate 20 is jointly and rotatably installed on the two fixed plates 19, a spring 21 is fixedly connected to one end of a lower surface of the movable plate 20, the other end of the spring 21 is fixedly connected to an upper surface of the base 17, an armature 32 engaged with the coil 18 is fixedly installed on a lower surface of the movable plate 20 above the coil 18, a first contact 22 is fixedly installed at one end of the upper surface of the movable plate 20, a second contact 23 engaged with the first contact 22 is fixedly installed on an inner top wall of the device cavity 2 above the first contact 22, and the second contact 23 is electrically connected to a motor 3.

When the coil 18 is powered by a low-voltage power supply, an electromagnetic field is generated inside the coil 18, the electromagnetic field attracts the armature 32 above to move downwards, the armature 32 moves downwards to drive the movable plate 20 to rotate, one end close to the motor 3 rotates upwards to drive the first contact 22 to move upwards, and then the first contact is contacted with the second contact 23, so that the motor 3 is powered on to start working.

As an embodiment of the present invention, referring to fig. 1, 4 and 6, the other end of the movable plate 20 is fixedly connected with a connecting plate 24, the other end of the connecting plate 24 is fixedly installed with a movable contact 25, the interior of the movable contact 25 is fixedly connected with a wire 26, two ends of the wire 26 penetrate through the movable contact 25 and extend to the lower side of the movable contact 25, two ends of the wire 26 are fixedly connected with wire joints 27 below the movable contact 25, the two wire joints 27 are made of metal tungsten, the other side wall of the interior of the device cavity 2 is fixedly installed with a fixed contact 28 below the movable contact 25, the other side wall of the exterior of the relay body 1 is fixedly installed with a high-voltage contact 29, the fixed contact 28 is electrically connected with the high-voltage contact 29, the inner bottom wall of the device cavity 2 is symmetrically and fixedly connected with fixed blocks 30 above the fixed contact 28, a memory alloy plate 31 is fixedly connected between the two fixed blocks 30, and the memory alloy plate 31 penetrates below the wire 26.

When the movable plate 20 rotates, one end far away from the motor 3 rotates downwards to drive the movable contact 25 to move downwards, then two lead connectors 27 on the movable contact 25 are in contact with and electrified with the static contact 28, a high-voltage power supply starts to be switched on, when the coil 18 is powered off, the coil 18 cannot attract the armature 32, the spring 21 can pull one end of the movable plate 20 to rotate, the other end of the movable plate 20 moves upwards to drive the movable contact 25 to be separated from the static contact 28, due to high voltage, at the moment that the static contact 28 and the movable contact 25 are separated, voltage is large, current is small, electric arcs can be generated, the temperature of the contact position of the two can reach one thousand ℃, the phenomenon of electric melting can occur, and the service life of the movable contact 25 is greatly influenced, so that the lead connectors 27 made of metal tungsten are arranged at the two ends of the lead 26 at the contact position, the metal tungsten can resist the high temperature of three thousand ℃, the electric conductivity is good, and the service life of the movable contact 25 can be prolonged;

when the end of the movable plate 20 away from the motor 3 moves downwards, the wire 26 drives the memory alloy plate 31 to bend downwards, when the current in the wire 26 is too large, the temperature of the wire 26 rises due to the heat effect of the current, when the temperature of the wire 26 reaches the deformation temperature of the memory alloy plate 31, the memory alloy plate 31 deforms and returns to the shape before being driven to bend by the wire 26, and meanwhile, the memory alloy plate 31 drives the wire 26 to move upwards, so that the circuit is disconnected, and overload is prevented.

Referring to fig. 1, 4 and 7, as an embodiment of the present invention, rotation grooves 33 are symmetrically formed on both sides of an upper surface of the movable plate 20, first rotation rods 34 are rotatably installed inside the two rotation grooves 33, the other ends of the two first rotation rods 34 are rotatably connected to second rotation rods 35, the other ends of the two second rotation rods 35 are rotatably connected to an inner top wall of the device cavity 2, energizing springs 36 are fixedly connected to one sides of the two first rotation rods 34, and the other ends of the two energizing springs 36 are fixedly connected to the inner top wall of the device cavity 2.

When the coil 18 is electrified, the electrifying spring 36 is also electrified, at the moment, the electrifying spring 36 contracts to drive the first rotating rod 34 to rotate, the first rotating rod 34 drives the second rotating rod 35 to rotate, the first rotating rod 34 and the second rotating rod 35 are both positioned in the vertical direction, when the relay body 1 is vibrated, the first rotating rod 34 and the second rotating rod 35 can have pressure in the vertical direction on the movable plate 20, the movable plate 20 cannot shake, the high-voltage circuit is prevented from being disconnected, and the normal work of the relay body 1 is ensured.

As an embodiment of the present invention, referring to fig. 1 and 4, a plurality of air outlets 37 are formed below the other side wall of the exterior of the relay body 1 at equal intervals, and each of the plurality of air outlets 37 is communicated with the device cavity 2.

The cold air is guided into the device cavity 2 from the air outlet pipe 11 and then is discharged from the air outlet 37, so that the cold air not only can cool the relay body 1 in the device cavity 2, but also can wrap and carry out dust in the device cavity 2 when being discharged, and the ash removal effect is achieved.

The working principle is as follows: when the relay body 1 is electrified and starts to work, the motor 3 can be synchronously started to work, the motor 3 can drive the rotating shaft 6 to rotate when being started, the rotating shaft 6 can drive the round block 7 to do eccentric motion in the round cavity 5, the round block 7 can do eccentric motion and simultaneously drive the lantern ring 8 to do eccentric motion, when the lantern ring 8 does eccentric motion, each line forming the outer edge of the lantern ring 8 is contacted with the inner wall of the round cavity 5, therefore, when the lantern ring 8 does eccentric motion, air at one side of the round cavity 5 close to the air inlet pipe 12 can be firstly extruded to one side close to the air outlet pipe 11, when the air in the round cavity 5 is extruded into the air outlet pipe 11, new air can enter the round cavity 5 from the air inlet pipe 12 under the pressure of atmospheric pressure, then the processes are repeated, and when the processes are carried out, the refrigerating end of the semiconductor refrigerating sheet 13 can refrigerate the round cavity 5, so that the air in the round cavity 5 becomes cold air, the lantern ring 8 extrudes the cooled cold air into the air outlet pipe 11 and then guides the cold air into the device cavity 2, the cold air can cool the inside of the device cavity 2, so that the temperature of the relay body 1 does not rise during working, the normal work of the relay body 1 is ensured, the rotating shaft 6 drives the plurality of radiating blades 14 to rotate when the semiconductor refrigerating sheet 13 refrigerates the air, the heating end of the semiconductor refrigerating sheet 13 is radiated, the temperature of the cooling end of the semiconductor refrigerating sheet 13 can achieve the purpose of refrigeration, the influence of the heat of the heating end on the air in the round cavity 5 is also prevented, when the radiating blades 14 rotate, the air can enter the rear part of the radiating blades 14 from the air inlet ring 15, then is taken out by the radiating blades 14, the air source continuously forms circulation, and the heat of the heating end of the semiconductor refrigerating sheet 13 is taken away by the air, the heat conducting silica gel has high heat conductivity and excellent heat conductivity, so that the refrigerating efficiency of a refrigerating end of the semiconductor refrigerating sheet 13 to air in the circular cavity 5 is higher and better, when a low-voltage power supply is connected to the coil 18, an electromagnetic field is generated in the coil 18 and attracts an armature 32 above the coil to move downwards, the armature 32 moves downwards to drive the movable plate 20 to rotate, one end close to the motor 3 rotates upwards to drive the first contact 22 to move upwards and then contacts with the second contact 23, so that the motor 3 starts to work when being electrified, when the movable plate 20 rotates, one end far away from the motor 3 rotates downwards to drive the movable contact 25 to move downwards, then two wire connectors 27 on the movable contact 25 are in contact with the static contact 28 to be electrified, the high-voltage power supply starts to work, when the coil 18 is powered off, the coil 18 does not attract the armature 32, the spring 21 pulls one end of the movable plate 20 to rotate, the other end of the movable contact 20 moves upwards to drive the movable contact 25 to separate from the static contact 28, because the high-voltage power supply, when the contact 28 and the movable contact 25 and the contact 25 are separated, the temperature can reach one thousand-temperature, when the temperature of the tungsten alloy wire connector 26 is high-temperature, the tungsten alloy metal connector 26, the tungsten connector 26 has a high-temperature memory effect phenomenon that the temperature of the tungsten connector 26 of the tungsten connector is high-temperature metal connector 26, when the tungsten connector is high-temperature memory metal connector 20, the tungsten connector is high-temperature metal connector 26, the tungsten connector is high-temperature metal connector, the tungsten connector 26, the tungsten connector can be heated metal connector when the tungsten connector is high-temperature memory metal connector 26, the tungsten connector is high-temperature memory metal connector is high-temperature metal connector, the tungsten connector when the tungsten connector 26, the tungsten connector is high-temperature memory metal connector when the tungsten connector 26, the tungsten connector is high-temperature memory metal connector, the tungsten connector is high-temperature metal connector, the tungsten connector 26, the memory alloy plate 31 is deformed and restored to the shape before being driven to bend by the lead 26, meanwhile, the memory alloy plate 31 drives the lead 26 to move upwards, so that the circuit is disconnected, and overload is prevented, when the coil 18 is electrified, the electrifying spring 36 is also electrified, at the moment, the electrifying spring 36 contracts to drive the first rotating rod 34 to rotate, the first rotating rod 34 drives the second rotating rod 35 to rotate, the first rotating rod 34 and the second rotating rod 35 are both in the vertical direction, when the relay body 1 is vibrated, the first rotating rod 34 and the second rotating rod 35 can apply a vertical pressure to the movable plate 20, so that the movable plate 20 cannot shake, the high-voltage circuit is prevented from being disconnected, and the normal operation of the relay body 1 is ensured, cold air is guided into the relay body 2 from the air outlet pipe 11 and then is exhausted from the air outlet 37, therefore, the cold air not only can cool the relay body 1 in the device cavity 2, but also can wrap dust in the dust removal device cavity 2 and bring out, and the effect of dust removal is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The relay with overcurrent protection comprises a relay body (1); the method is characterized in that: the relay comprises a relay body (1), a device cavity (2) is formed in the relay body (1), a motor (3) is fixedly mounted on one side wall of the device cavity (2), an output shaft of the motor (3) penetrates through the relay body (1) and extends to the outside of the relay body (1), a rotating shaft (6) is fixedly connected to the outside of the relay body (1) through the output shaft of the motor (3), a circular plate (4) is fixedly mounted on the outer side wall of the relay body (1), a circular cavity (5) is formed in the circular plate (4), and one end of the rotating shaft (6) penetrates through the circular plate (4) and extends to the inside of the circular cavity (5);

pivot (6) have disk (7) in the inside fixed mounting of circle chamber (5), the outside rotation of disk (7) installs lantern ring (8), smooth chamber (9) have been seted up to the top of circle chamber (5), the outer fringe of lantern ring (8) articulates there is slider (10), slider (10) slide in the inside of smooth chamber (9), the lateral wall symmetry fixed mounting of plectane (4) has semiconductor refrigeration piece (13), the one end of pivot (6) runs through plectane (4) and extends to the outside of plectane (4), the one end outer fringe of pivot (6) has a plurality of radiator fin (14) in the equidistant fixed mounting in the outside circumference of plectane (4), the both sides of plectane (4) fixed mounting respectively have outlet duct (11) and intake pipe (12), the other end and the device chamber (2) of outlet duct (11) are linked together.

2. The relay with overcurrent protection according to claim 1, wherein: the lateral wall fixed mounting of plectane (4) has air inlet ring (15), the outside fixed mounting of air inlet ring (15) has sector (16), the contact surface of semiconductor refrigeration piece (13) and plectane (4) scribbles heat conduction silica gel.

3. The relay with overcurrent protection according to claim 1, wherein: the device is characterized in that a base (17) is fixedly mounted on the inner bottom wall of the cavity (2), a coil (18) is fixedly mounted at one end of the upper surface of the base (17), a fixing plate (19) is symmetrically and fixedly mounted at the other end of the upper surface of the base (17), a movable plate (20) is mounted by the fixing plate (19) in a rotating mode, a spring (21) is fixedly connected to one end of the lower surface of the movable plate (20), and the other end of the spring (21) is fixedly connected with the upper surface of the base (17).

4. The relay with overcurrent protection according to claim 3, wherein: and an armature (32) matched with the coil (18) is fixedly arranged on the lower surface of the movable plate (20) above the coil (18).

5. The relay with overcurrent protection as set forth in claim 4, wherein: a first contact (22) is fixedly mounted at one end of the upper surface of the movable plate (20), a second contact (23) matched with the first contact (22) is fixedly mounted on the inner top wall of the device cavity (2) above the first contact (22), and the second contact (23) is electrically connected with the motor (3).

6. The relay with overcurrent protection according to claim 5, wherein: the other end fixedly connected with connecting plate (24) of fly leaf (20), the other end fixed mounting of connecting plate (24) has moving contact (25), the inside fixedly connected with wire (26) of moving contact (25), the both ends of wire (26) run through moving contact (25) and extend to the below of moving contact (25).

7. The relay with overcurrent protection according to claim 6, wherein: the two ends of the wire (26) are fixedly connected with wire connectors (27) below the movable contact (25), the two wire connectors (27) are made of metal tungsten, a fixed contact (28) is fixedly mounted on the other side wall of the inner portion of the device cavity (2) below the movable contact (25), a high-voltage contact (29) is fixedly mounted on the other side wall of the outer portion of the relay body (1), and the fixed contact (28) is electrically connected with the high-voltage contact (29).

8. The relay with overcurrent protection according to claim 7, wherein: the inner bottom wall of the device cavity (2) is symmetrically and fixedly connected with fixed blocks (30) above the static contact (28), a memory alloy plate (31) is fixedly connected between the two fixed blocks (30) together, and the memory alloy plate (31) penetrates through the lower part of the lead (26).

9. The relay with overcurrent protection according to claim 8, wherein: rotation groove (33), two have been seted up to the upper surface bilateral symmetry of fly leaf (20) the inside of rotating groove (33) is all rotated and is installed first bull stick (34), two the other end of first bull stick (34) is all rotated and is connected with second bull stick (35), two the other end of second bull stick (35) all rotates with the interior roof of device chamber (2) and is connected, two the equal fixedly connected with circular telegram spring (36), two in one side of first bull stick (34) the other end of circular telegram spring (36) all with the interior roof fixed connection of device chamber (2).

10. The relay with overcurrent protection according to claim 1, wherein: a plurality of air outlets (37) are formed in the lower portion of the other side wall of the outer portion of the relay body (1) at equal intervals, and the plurality of air outlets (37) are communicated with the device cavity (2).