CN113161174A

CN113161174A - Relay for circuit control

Info

Publication number: CN113161174A
Application number: CN202110196959.7A
Authority: CN
Inventors: 尹纯标
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-07-23

Abstract

The invention relates to the technical field of power equipment, and discloses a relay for circuit control, which comprises a casing, wherein a partition plate is fixedly arranged in the middle of the inside of the casing, the partition plate is L-shaped, a fixing sleeve is fixedly arranged on the upper surface of one side of the partition plate, an iron core is fixedly sleeved in the fixing sleeve, a coil is fixedly sleeved outside the fixing sleeve, the top end of the partition plate is movably connected with a magnetic yoke, and the magnetic yoke is a transverse magnetic rod at the upper part of the fixing sleeve. This relay for circuit control, receive the thermal energy in the heating air chamber after driving the attraction piston and remove to make the piston contact retract, make after two contacts separation produce the electric arc, the piston contact moves towards both sides with the swing contact simultaneously, make the distance between the two contacts increase, make the air quantity increase between two contacts then, mention air resistivity, and improve the separating velocity for the arc extinguishing speed, guarantee the safety of relay inner member then.

Description

Relay for circuit control

Technical Field

The invention relates to the technical field of power equipment, in particular to a relay for circuit control.

Background

The relay is an automatic switch which uses a small current to control a large current, so that the relay plays roles of automatic adjustment, safety protection, circuit conversion and the like in a circuit. When the circuit at relay place needs the circular telegram, earlier with the inside coil circular telegram of relay for the iron core produces magnetic force and attracts the yoke downwards then makes the yoke rotate, then with the movable contact and the switch-on of stationary contact, feasible formation route.

Firstly, the contact system is an important part of the relay, the service life and the safety of the relay are influenced by the performance of the contact system, the electric arc ablation is the largest component for damaging the contact system, in the process that the movable contact and the fixed contact are separated from the contact, because the current is conducted between two points, when the contact is separated, the voltage at two ends is overhigh, the current at two ends is caused to conduct the air in the gap between the two contacts, then, the electric arc is generated in the relay, if the electric arc is not extinguished in time, the internal elements of the relay can be damaged, and the service life of the relay is reduced.

Secondly, when the voltage exceeds 12-20V and the current exceeds 0.25A-2A, an electric arc can be generated between contacts after the circuit is disconnected, the electric arc releases a large amount of heat after generation, the internal temperature of the relay is suddenly increased, the internal temperature of the relay is too high, the temperature of a coil is too high, the relay characteristic of the coil is changed, the coil is damaged, and the relay cannot be switched.

Disclosure of Invention

The invention provides a relay for circuit control, which has the advantage of rapid arc extinction and solves the problems mentioned in the background technology.

The invention provides the following technical scheme: a relay for circuit control comprises a housing, wherein a partition plate is fixedly arranged at the middle part inside the housing and is of an L shape, a fixed sleeve is fixedly arranged on the upper surface of one side of the partition plate, an iron core is fixedly sleeved in the inside of the fixed sleeve, a coil is fixedly sleeved outside the fixed sleeve, a magnetic yoke is movably connected to the top end of the partition plate, the magnetic yoke is a transverse magnetic rod at the upper part of the fixed sleeve, the other side of the partition plate is a longitudinal push rod at the fixed sleeve, a return spring is fixedly arranged on the lower surface of the magnetic yoke, the lower surface of the return spring and the fixed sleeve are close to the upper surface of one side of the partition plate and are connected with each other, a swinging contact is fixedly arranged at the bottom end of the magnetic yoke, a pneumatic cavity is fixedly arranged at the lower end of the other side of the housing, one side of the pneumatic cavity is fixedly connected with a heating air chamber positioned inside the partition plate and an attraction air chamber embedded in the inner wall of the housing, the suction air chamber is movably sleeved with a piston contact positioned in the shell on one side close to the interior of the shell, the upper surface of the heating air chamber is fixedly provided with a heat conducting layer, the interior of the air pressure chamber is movably sleeved with a suction piston, the upper end and the lower end of one side of the air pressure chamber are respectively fixedly connected with a suction piston and a driving piston, and the suction piston and the driving piston are respectively movably sleeved in the suction air chamber and the heating air chamber.

Preferably, the inside of casing is seted up and is located the gas storage chamber of division board below, the opposite side fixedly connected with of atmospheric pressure chamber and the communicating pipe of being connected bottom the gas storage chamber, the oppression piston has been cup jointed with the outside activity of the pipeline that the communicating pipe is connected to the gas storage chamber inside, oppression piston lower fixed surface installs balancing spring, the air guide hole has been seted up to the lower surface of division board.

Preferably, the height of the top end of one side, far away from the partition plate, of the fixed sleeve is higher than that of the other side of the fixed sleeve, and after the magnetic yoke rotates to the point where the swinging contact is contacted with the piston contact, the top end of the magnetic yoke is contacted with the higher side of the fixed sleeve.

Preferably, the pipe diameter of the heating air chamber is twice that of the suction air chamber, the suction air chamber is located above the heating air chamber, the heat conduction layer is located right below the contact position of the piston contact and the swing contact, and the piston contact is always connected with electricity in the moving process of the suction air chamber.

Preferably, the air guide hole is divided into an outer ring and an inner ring, gaps are reserved on the inner side and the outer side of the coil, and the diameters of the gaps and the diameter of the air guide hole are the same.

The invention has the following beneficial effects:

1. this relay for circuit control, receive the thermal energy in the heating air chamber after driving the attraction piston and remove to make the piston contact retract, make after two contacts separation produce the electric arc, the piston contact moves towards both sides with the swing contact simultaneously, make the distance between the two contacts increase, then make the air capacity increase between two contacts, mention air resistivity, and improve the separating velocity for the arc extinguishing speed, guarantee the safety of relay inner member then.

2. This relay for circuit control through the inflation of the interior gas of heating air chamber, drives the intraductal gas motion of intercommunication for oppress the piston and shift up and promote near upper cold air from the air guide hole push coil in the gas storage intracavity, make and form the cold air protective layer in the inside and outside both sides of coil after electric arc produces, make near temperature of coil lower then, improve the life-span of coil, thereby ensure that the relay characteristic of coil does not change.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a schematic diagram of the open-contact state of the relay according to the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic view of the expansion piston configuration of the present invention;

FIG. 5 is a schematic view of the distribution of air-guiding holes according to the present invention.

In the figure: 1. a housing; 2. a partition plate; 3. fixing a sleeve; 4. an iron core; 5. a coil; 6. a magnetic yoke; 7. A return spring; 8. a pneumatic chamber; 9. a communicating pipe; 10. a swinging contact; 11. a suction air chamber; 12. heating the air chamber; 13. an air cavity piston; 14. a suction piston; 15. an active piston; 16. a piston contact; 17. A heat conductive layer; 18. a gas storage cavity; 19. pressing the piston; 20. a balance spring; 21. and air vents.

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.

Referring to fig. 1-5, a relay for circuit control comprises a housing 1, a divider plate 2 is fixedly installed at the middle part inside the housing 1, the divider plate 2 is L-shaped, the vertical part of the divider plate 2 is used for dividing a contact and a coil 5 into two cavities, reducing temperature variation near the coil 5, the horizontal part is used for installing an iron core 4 and the coil 5, a fixed sleeve 3 is fixedly installed on the upper surface of one side of the divider plate 2, the iron core 4 is fixedly sleeved inside the fixed sleeve 3, the coil 5 is fixedly sleeved outside the fixed sleeve 3, the top end of the divider plate 2 is movably connected with a magnetic yoke 6, a rotating shaft is arranged on the divider plate 2, the magnetic yoke 6 rotates on the rotating shaft, the magnetic yoke 6 is a horizontal magnetic rod above the fixed sleeve 3, the magnetic rod is attracted by an electromagnet after the coil 5 is electrified and moves downwards against the elasticity of a return spring 7, the fixed sleeve 3 is a longitudinal push rod at the other side of the divider plate 2, a return spring 7 is fixedly arranged on the lower surface of a magnetic yoke 6, the lower surface of the return spring 7 is connected with the upper surface of one side of a fixed sleeve 3 close to a partition plate 2, a swing contact 10 is fixedly arranged at the bottom end of the magnetic yoke 6, a pneumatic chamber 8 is fixedly arranged at the lower end of the other side of a casing 1, one side of the pneumatic chamber 8 is fixedly connected with a heating air chamber 12 positioned in the partition plate 2 and an attraction air chamber 11 embedded in the inner wall of the casing 1, the attraction air chamber 11 is embedded in the inner wall of the casing 1 to ensure that the internal air is not influenced by the internal temperature of the casing 1, a piston contact 16 positioned in the casing 1 is movably sleeved at one side of the attraction air chamber 11 close to the inside of the casing 1, the swing contact 10 is separated under the elastic force of the return spring 7, the piston contact 16 retracts under the influence of electric arc, the two move towards two sides together, and a heat conducting layer 17 is fixedly arranged on the upper surface of the heating air chamber 12, the heat conduction efficiency of the heating air chamber 12 is improved, the suction piston 14 is movably sleeved in the air pressure chamber 8, the upper end and the lower end of one side of the air pressure chamber 8 are respectively and fixedly connected with the suction piston 14 and the driving piston 15, and the suction piston 14 and the driving piston 15 are respectively and movably sleeved in the suction air chamber 11 and the heating air chamber 12.

Wherein, the gas storage chamber 18 that is located division board 2 below is seted up to casing 1's inside, gas storage chamber 18 adopts thermal insulation material to make, and far away with the contact position, make its inside gas temperature not influenced by electric arc, the opposite side fixedly connected with of atmospheric pressure chamber 8 and the communicating pipe 9 of being connected bottom the gas storage chamber 18, the pipeline outside activity that gas storage chamber 18 inside and communicating pipe 9 are connected has cup jointed oppression piston 19, when the original position, oppression piston 19 and balance spring 20 form the equilibrium state in, oppression piston 19 fixed surface installs balance spring 20, air guide hole 21 has been seted up to division board 2's lower surface, outside air guide hole 21 is more than the inboard.

Wherein, fixed cover 3 is kept away from 2 one sides top of division board highly than the other side height, and fixed cover 3 one side is used for fixed spring, guarantees to restore the normal position, and the opposite side is used for the screens, guarantees that the extreme position after yoke 6 is attracted can not influence the position of piston contact 16, and after yoke 6 rotated swing contact 10 and piston contact 16 contact, yoke 6 top and the higher one side contact of fixed cover 3.

The pipe diameter of the heating air chamber 12 is twice that of the suction air chamber 11, the driving piston 15 in the heating air chamber 12 moves actively, and other piston parts are driven to move through the driving piston 15, so that an expected result is achieved, the suction air chamber 11 is located above the heating air chamber 12, the heat conduction layer 17 is located right below the contact position of the piston contact 16 and the swinging contact point 10, so that the temperature of an electric arc generated after the two contacts are separated is increased, the electric arc is transmitted to the heating air chamber 12 in the first time, the piston contact 16 is always electrified in the moving process of the suction air chamber 11, and the increase of the distance between the contacts is ensured.

Wherein, air guide hole 21 divide into outer lane and inner circle, and coil 5 is inboard all leaves the space with the outside, and the diameter of air guide hole 21 is the same, oppresses piston 19 after the rebound in the below, discharges the cold air that gas storage chamber 18 had from air guide hole 21 to flow along coil 5 inside and outside space, guarantee that the temperature near coil 5 is lower, protects coil 5's safety.

The working principle of the embodiment is as follows:

when the circuit needs to be connected, a small current is introduced into the coil 5, so that a magnetic field is generated in the iron core 4, the top end position of the magnetic yoke 6 is attracted downwards, the magnetic yoke 6 starts to rotate, the top end position moves downwards and compresses the return spring 7, and when the top end position of the magnetic yoke 6 is contacted with one end of the fixed sleeve 3, which is far away from the partition plate 2, the swinging contact 10 is contacted with the piston contact 16, so that the circuit is connected.

When the circuit needs to be disconnected, the small current connected into the coil 5 is closed at this time, the magnetic yoke 6 rebounds under the action of the rebounding force of the rebounding spring 7 at this time, the swinging contact 10 is separated from the piston contact 16, but because the swinging contact 10 and the two ends of the piston contact 16 are communicated with large currents, when the swinging contact 10 and the piston contact 16 are separated, the air in the gap between the two contacts is conducted by the current, so that the electric arc is generated between the two contacts, the internal temperature of the relay is raised, at this time, because the attraction air chamber 11 is positioned outside the casing 1, the internal air is not influenced by the electric arc, the heating air chamber 12 is positioned right below the contact point of the swinging contact 10 and the piston contact 16, the internal air in the heating air chamber 12 is heated to the maximum, the internal air in the heating air chamber 12 starts to expand when the electric arc is generated, the driving piston 15 is pushed towards one side of the air pressure chamber 8, and drives the attraction piston 14 in the attraction air chamber 11 above to move, at this time, negative pressure is generated in the suction air chamber 11, so that the piston contact 16 is attracted to move towards the air pressure chamber 8, and through the structure, after an electric arc is generated after the two contacts are separated, the piston contact 16 and the swinging contact 10 simultaneously move towards two sides, so that the distance between the two contacts is increased, the separation speed is increased, and the arc extinguishing speed is accelerated.

In the moving process of the air cavity piston 13, the gas in the communicating pipe 9 flows and is led out from the air storage cavity 18, the pressing piston 19 is pushed to move upwards, the upper layer gas in the air storage cavity 18 is pressed to be led out from the air guide hole 21, air protection layers are formed on the inner side and the outer side of the coil 5, the air flow on two sides is accelerated, after the temperature of the part, close to the coil 5, caused by electric arc generation is increased, the air with lower temperature stored in the air storage cavity 18 is released to the part, close to the coil 5, the heat dissipation efficiency is accelerated, the relay characteristic of the coil 5 is ensured, after the electric arc is extinguished, when the temperature in the heating air cavity 12 is reduced, the air pressure cavity 8 returns to the original position under the action of negative pressure, and at the moment, new air is sucked into the air storage cavity 18 due to the position reduction of the pressing piston 19.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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. A relay for circuit control, includes casing (1), its characterized in that: casing (1) inside middle part fixed mounting has division board (2), division board (2) are the L type, the last fixed surface of division board (2) one side installs fixed cover (3), the inside fixed cup joint of fixed cover (3) has iron core (4), the external fixation of fixed cover (3) has cup jointed coil (5), the top swing joint of division board (2) has yoke (6), yoke (6) are horizontal magnetic pole in fixed cover (3) top part, fixed cover (3) are vertical push rod at the opposite side of division board (2), the lower fixed surface of yoke (6) installs return spring (7), the lower surface of return spring (7) and fixed cover (3) are close to division board (2) one side upper surface connection, the bottom fixed mounting of yoke (6) has swing contact (10), the lower extreme fixed mounting of casing (1) opposite side has atmospheric pressure chamber (8), one side fixedly connected with in atmospheric pressure chamber (8) is located heating air chamber (12) inside division board (2) and attracts air chamber (11) of embedding casing (1) inner wall, attract air chamber (11) to be close to casing (1) inside one side activity and cup joint piston contact (16) that are located casing (1) inside, the last fixed surface installation heat-conducting layer (17) of heating air chamber (12), the inside activity of atmospheric pressure chamber (8) has cup jointed and has attracted piston (14), both ends fixedly connected with respectively attracts piston (14) and initiative piston (15) about one side of atmospheric pressure chamber (8), attract piston (14) and initiative piston (15) activity respectively cup joint and attract air chamber (11) and heat air chamber (12) inside.

2. The relay for circuit control according to claim 1, wherein: the gas storage chamber (18) that are located division board (2) below are seted up to the inside of casing (1), communicating pipe (9) that opposite side fixedly connected with and gas storage chamber (18) bottom of atmospheric pressure chamber (8) are connected, the outside activity of pipeline that gas storage chamber (18) inside and communicating pipe (9) are connected has cup jointed oppression piston (19), oppression piston (19) fixed surface installs balancing spring (20), air guide hole (21) have been seted up to the lower surface of division board (2).

3. The relay for circuit control according to claim 1, wherein: the height of the top end of one side, far away from the separation plate (2), of the fixed sleeve (3) is higher than that of the other side, after the magnetic yoke (6) rotates to the point that the swinging contact (10) is contacted with the piston contact (16), the top end of the magnetic yoke (6) is contacted with the higher side of the fixed sleeve (3).

4. The relay for circuit control according to claim 1, wherein: the pipe diameter of the heating air chamber (12) is twice that of the suction air chamber (11), the suction air chamber (11) is located above the heating air chamber (12), the heat conduction layer (17) is located right below the contact position of the piston contact (16) and the swing contact (10), and the piston contact (16) is always connected with electricity in the moving process of the suction air chamber (11).

5. A circuit control relay according to claim 2, wherein: the air guide hole (21) is divided into an outer ring and an inner ring, gaps are reserved on the inner side and the outer side of the coil (5), and the diameters of the gaps and the air guide hole (21) are the same.