CN220873491U

CN220873491U - High-voltage direct-current relay with main loop working state monitoring function

Info

Publication number: CN220873491U
Application number: CN202322579499.3U
Authority: CN
Inventors: 许毅; 黄彩丽; 彭涛; 周伟钢
Original assignee: Zhejiang Hecheng Intelligent Electric Co ltd
Current assignee: Zhejiang Hecheng Intelligent Electric Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-30
Anticipated expiration: 2033-09-21

Abstract

The utility model discloses a high-voltage direct current relay with a main circuit working state monitoring function, which solves the problems that a conventional relay auxiliary circuit cannot effectively monitor a main circuit, occupies large space, has complex structure and process, has high cost and the like, and adopts the main technical scheme that: the pushing assembly comprises a pushing rod and drives a main loop to be closed through the pushing rod, symmetrical auxiliary opening assemblies are further arranged at two ends of the top of the pushing rod, each auxiliary opening assembly comprises an isolation cover, an auxiliary static contact, an auxiliary dynamic reed and an auxiliary static contact piece, the isolation cover is arranged between the main loops in an erected mode, an elastic piece used for assisting assembly is further arranged at the top of the isolation cover, the auxiliary static contact pieces and the isolation cover are integrally molded, two ends of the auxiliary static contact pieces are exposed in an injection mode, the top of each auxiliary static contact piece is in interference hard contact with the top of each auxiliary static contact piece, one end of each auxiliary dynamic reed is integrally molded with the top of the pushing rod, and the other end of each auxiliary dynamic reed is in movable contact with the top of each auxiliary static contact piece.

Description

High-voltage direct-current relay with main loop working state monitoring function

Technical Field

The utility model relates to the technical field of relays, in particular to a high-voltage direct-current relay with a function of monitoring the working state of a main loop.

Background

The relay is an automatic control electric appliance, which uses the coil to flow current to generate magnetic field to close the contact so as to control the load.

The direct current relay generally comprises a main loop (comprising an active contact bridge and a main static contact) for connecting a load to realize on-off control of the load, wherein the main static contact is arranged on a main leading-out end, the active contact is arranged on a pushing mechanism, and when a coil is excited, the pushing mechanism drives the active contact bridge to move so as to enable the active contact bridge to be in contact with the main static contact. In order to detect the on-off condition of a main loop, the direct current relay in the prior art is usually provided with a micro switch which is arranged at a corresponding position in the direct current relay, a poking arm is arranged on a pushing mechanism, when the pushing mechanism drives an active contact bridge to move so that the active contact bridge contacts with a main static contact, the pushing mechanism simultaneously drives the poking arm to move, the poking arm touches the movable arm of the micro switch to enable the micro switch to be switched on or off, and a circuit board of the direct current relay is used for transmitting on or off signals of the micro switch, so that the on-off condition of the main loop is monitored.

At present, as the chinese patent of publication No. CN210805639U discloses a high-voltage direct current relay with auxiliary contacts, which comprises a housing, a top shell, a stationary contact, an electromagnet, a packaging frame, a packaging shell, a movable contact, a push block, a connecting block, a fixed contact plate, a movable contact plate, a push plate, a telescopic column and a reset spring, wherein the top shell is fixedly packaged at the top of the housing, the electromagnet is internally installed in the top shell, the packaging frame is internally fixed with the packaging frame, the stationary contact is symmetrically embedded in the top of the packaging frame, the movable contact matched with the stationary contact is fixed at the top of the iron core of the electromagnet, the packaging shell is installed at one side of the stationary contact in the packaging frame, the movable contact is pushed to ascend by the electromagnet, the movable contact plate and the fixed contact plate are elastically jointed in a linkage manner, an auxiliary passage is formed, the signal feedback of a group of passages is provided, the use of the traditional micro switch is changed, the failure rate is reduced by the mechanical structure, and the service life and practicability of the product are improved.

The direct current relay can realize the auxiliary opening function in the narrow space of the relay packaged by ceramics, and is safe and reliable, but the reed and the auxiliary contact of the auxiliary opening component are inserted into the gap of the shielding cover, so that the micro switch has large volume and large occupied space, has large requirement on the volume of the cavity of the relay, has higher corresponding cost, has small micro switch stroke, and easily causes the phenomenon that the state of the main loop is inconsistent with the state of the auxiliary loop, thereby influencing the judgment accuracy.

Disclosure of utility model

In order to overcome the defects, the utility model aims to provide the high-voltage direct-current relay which has the advantages of small occupied space, simple structure and low cost and has the function of monitoring the working state of the main loop.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a high voltage dc relay having a function of monitoring an operating state of a main circuit, comprising: the pushing assembly comprises a pushing rod and drives a main loop to be closed through the pushing rod, symmetrical auxiliary opening assemblies are further arranged at two ends of the top of the pushing rod, each auxiliary opening assembly comprises an isolation cover, an auxiliary static contact, an auxiliary dynamic reed and an auxiliary static contact piece, the isolation cover is arranged between the main loops in an erected mode, an elastic piece used for assisting assembly is further arranged at the top of the isolation cover, the auxiliary static contact pieces and the isolation cover are integrally molded, two ends of the auxiliary static contact pieces are exposed in an injection mode, the top of each auxiliary static contact piece is in interference hard contact with the top of each auxiliary static contact piece, one end of each auxiliary dynamic reed is integrally molded with the top of the pushing rod, and the other end of each auxiliary dynamic reed is in movable contact with the top of each auxiliary static contact piece.

Further, the elastic sheet is plastic and is of a sheet structure, and the elastic sheet is positioned at two ends of the top of the isolation cover.

Further, the auxiliary movable reed is provided with a convex hull and a slot, the auxiliary static contact piece is Z-shaped, the top of the auxiliary static contact piece is provided with a clamping groove, and the auxiliary static contact is in interference fit with the clamping groove.

Further, the push rod assembly further comprises a lower bracket, a contact spring, an active contact bridge and an upper bracket, wherein the lower bracket is integrated with the push rod in an injection molding mode, the contact spring is arranged on the lower bracket, the active contact bridge is arranged on the contact spring, and the upper bracket is sleeved on the active contact bridge and riveted with the lower bracket.

Further, the device also comprises a ceramic component and a magnetic pole piece component, wherein the upper part of the push rod component passes through a through hole in the middle of the magnetic pole piece component from the inner part and the lower part of the ceramic component.

Further, the ceramic component comprises ceramic, a main fixed contact, an auxiliary fixed contact and a connecting ring, wherein the main fixed contact and the auxiliary fixed contact are welded into a whole and are positioned in a hole on the ceramic, the connecting ring is welded below the ceramic, and two ends of the active contact bridge are in movable contact with the main fixed contact, and the movable stroke is larger than that of the auxiliary movable reed, so that the auxiliary loop is conducted before the main loop.

Further, the magnetic pole piece assembly comprises a magnetic pole piece, a counter-force spring, a static iron core fixed with a middle hole of the magnetic pole piece and provided with a through hole in the middle, a sleeve welded with the magnetic pole piece and a movable iron core, and the magnetic pole piece assembly is positioned below the ceramic assembly and welded with the connecting ring.

Further, the counter-force spring and the movable iron core penetrate through the lower portion of the push rod, the bottom of the push rod is fixed with the movable iron core, the counter-force spring is compressed by the static iron core and the movable iron core to form a certain compression amount, and the sleeve is sleeved outside the movable iron core and the static iron core.

The beneficial effects of the utility model are as follows:

1. the auxiliary static contact piece and the isolation cover are integrally injection molded, so that the dimensional accuracy is higher, and the production and the assembly are simple;

2. The upper end elastic sheet structure of the isolation cover protects the auxiliary static contact sheet to improve the creepage distance, increases the product withstand voltage, can effectively block the pollutant from being conducted between the two main static contacts to improve the creepage distance, increases the product withstand voltage, and can be accommodated by the groove of the isolation cover;

3. The elastic sheet at the top of the isolation cover can ensure that the auxiliary opening assembly cannot shake up and down by absorbing large assembly tolerance of the ceramic cover and other assemblies, and the elastic sheet is arranged at the upper end to change a positioning reference into a magnetic pole piece, so that the dimensional accuracy of the auxiliary static contact piece is further improved, and the consistency of products is improved;

4. the auxiliary movable reed and the auxiliary static contact piece can be grooved and the convex hull can further improve the mechanical life of the auxiliary movable reed and the auxiliary static contact piece while ensuring stable assembly.

Drawings

FIG. 1 is a front view of a preferred embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along the direction A of FIG. 1 in accordance with a preferred embodiment of the present utility model;

FIG. 3 is a right side view of a preferred embodiment of the present utility model;

FIG. 4 is a cross-sectional view B of FIG. 3 according to a preferred embodiment of the present utility model;

FIG. 5 is another angular internal cross-sectional view of a preferred embodiment of the present utility model;

In the figure: 1. a push rod assembly; 11. an active contact bridge; 12. a push rod; 13. a contact spring; 14. a lower bracket; 15. an upper bracket; 2. a ceramic component; 21. a ceramic; 22. a main stationary contact; 23. a connecting ring; 3. an auxiliary opening component; 31. an isolation cover; 32. an auxiliary fixed contact; 33. auxiliary spring leaf; 34. auxiliary static contact pieces; 35. an elastic sheet; 36. convex hulls; 37. slotting; 38. a clamping groove; 4. a pole piece assembly; 41. a movable iron core; 42. a stationary core; 43. a reaction force spring; 44. a pole piece; 45. a sleeve; 46. and an exhaust pipe.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1-5, a high voltage dc relay with a function of monitoring a main circuit operation state in this embodiment includes: the pushing assembly comprises a pushing rod 12 and drives a main loop to be closed through the pushing rod 12, symmetrical auxiliary opening assemblies 3 are further arranged at two ends of the top of the pushing rod 12, each auxiliary opening assembly 3 comprises an isolation cover 31, auxiliary fixed contacts 32, auxiliary movable reeds 33 and auxiliary fixed contact pieces 34, the isolation cover 31 is erected between the main loop, elastic pieces 35 used for assisting assembly are further arranged at the tops of the isolation cover 31, the auxiliary fixed contact pieces 34 and the isolation cover 31 are integrally molded, two ends of the auxiliary fixed contact pieces 34 are exposed, the auxiliary fixed contacts 32 are in interference hard contact with the tops of the auxiliary fixed contact pieces 34, one ends of the auxiliary movable reeds 33 are integrally molded with the tops of the pushing rod 12, and the other ends of the auxiliary movable reeds 33 are in movable contact with the tops of the auxiliary fixed contact pieces 34.

The auxiliary static contact piece 34 and the isolation cover 31 in the scheme are molded into a whole, the auxiliary movable reed 33 and the top of the push rod 12 are molded into a whole, and compared with the conventional relay, the auxiliary static contact piece is higher in structural dimensional accuracy, simpler in production and assembly and simpler in overall structure, and the auxiliary opening component 3 is positioned between the main static contacts so as to ensure that the arc extinguishing space around the main contacts is not occupied.

As shown in fig. 5, the auxiliary movable reed 33 is provided with a convex hull 36 and a slot 37, the auxiliary static contact piece 34 is in a zigzag shape, the top of the auxiliary static contact piece is provided with a clamping groove 38, and the auxiliary static contact 32 is in interference fit with the clamping groove 38.

The plastic isolation cover 31 isolates the z-shaped auxiliary static contact piece 34 up and down, the auxiliary movable contact piece 33 is arranged in a groove formed at the lower end of the isolation cover 31, so that pollutants can be prevented from polluting the contact ends of the auxiliary static contact piece 34 and the auxiliary movable contact piece 33, a convex hull 36 and a slot 37 are additionally arranged in the middle of the auxiliary movable contact piece 33, when the compression amount is large, the mechanical life of the auxiliary movable contact piece 33 can be prolonged, a clamping groove 38 is formed at the upper end of the auxiliary static contact piece 34, interference hard contact conduction with the auxiliary static contact piece 32 is realized, and the connection stability is ensured.

As shown in fig. 5, the elastic sheet 35 is plastic and has a sheet structure, which is located at two ends of the top of the isolation cover 31 and is in interference contact with the top of the ceramic 21 cover, so as to form a closed space.

The two elastic sheets 35 positioned at the two ends of the top of the isolation cover 31 are of sheet-shaped structures, the sheet-shaped characteristics have compression elasticity, can absorb large assembly tolerance of components such as the ceramic 21 cover and the like, indirectly ensure that the whole structure of the auxiliary opening component 3 cannot shake up and down, change the whole positioning reference into the magnetic pole pieces 44 in a mode that the elastic sheets 35 are arranged at the upper end of the isolation cover 31, improve the dimensional precision of the auxiliary static contact pieces and improve the consistency of products; meanwhile, the elastic sheet 35 can further improve the creepage distance of the auxiliary static contact sheet 34, and increase the product withstand voltage, and correspondingly, because the elastic sheet 35 is also arranged between the two main static contacts 22, the conduction of pollutants between the two main static contacts can be effectively blocked, the creepage distance is improved, and the product withstand voltage is increased.

For the structure of the isolation cover 31, a plurality of grooves formed at the lower part of the isolation cover 31 can be used for receiving and containing pollutants, the circle of lower part of the isolation cover 31 is higher than the long arm at the bottom of the ceramic 21 cover, the welding part of the ceramic 21 cover and the connecting ring 23 is shielded, arc damage is isolated, a concave groove structure is adopted in the middle of the isolation cover 31, and the creepage distance of two main stationary contacts 22 can be increased in the middle of the two main stationary contacts 22.

As shown in fig. 2 and 4, the push rod assembly 1 further includes a lower bracket 14 integrally injection-molded with the push rod 12, a contact spring 13 disposed on the lower bracket 14, an active contact bridge 11 disposed on the contact spring 13, and an upper bracket 15 sleeved on the active contact bridge 11 and riveted with the lower bracket 14. The high-voltage direct-current relay further comprises a ceramic component 2 and a magnetic pole piece component 4, wherein the upper part of the push rod component 1 is positioned inside the ceramic component 2, and the lower part of the push rod component passes through a through hole in the middle of the magnetic pole piece component 4.

The ceramic component 2 comprises a ceramic 21, a main static contact 22 integrally welded in a hole on the ceramic 21 and a connecting ring 23 welded below the ceramic 21, wherein two ends of the active contact bridge 11 are in movable contact with the main static contact 22, and the movable stroke is larger than that of the auxiliary reed 33, so that the auxiliary loop is ensured to be conducted before the main loop.

The magnetic pole piece assembly 4 comprises a magnetic pole piece 44, a counter-force spring 43, a static iron core 42 riveted with a middle hole of the magnetic pole piece 44 and provided with a through hole in the middle, a sleeve 45 welded with the magnetic pole piece 44 and a movable iron core 41, the magnetic pole piece assembly 4 is positioned below the ceramic assembly 2 and welded with the connecting ring 23, and an exhaust pipe 46 is further arranged at the bottom of the magnetic pole piece 44. The reaction spring 43 and the movable iron core 41 pass through the lower part of the push rod 12, the bottom of the push rod 12 is welded and fixed with the movable iron core 41, the reaction spring 43 is compressed by the static iron core 42 and the movable iron core 41 to form a certain compression amount, and the sleeve 45 is sleeved outside the movable iron core 41 and the static iron core 42.

When in actual use, the auxiliary loop spacing is smaller than the main loop spacing; the auxiliary loop is conducted before the main loop, the main loop is disconnected by the auxiliary loop, and when the main loop of the relay is bonded, the disconnection sequence can feed back the state of the main loop more accurately, so that false alarm can not occur.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. A high voltage dc relay having a function of monitoring an operation state of a main circuit, comprising: the pushing assembly comprises a pushing rod and drives a main loop to be closed through the pushing rod, symmetrical auxiliary opening assemblies are further arranged at two ends of the top of the pushing rod, each auxiliary opening assembly comprises an isolation cover, an auxiliary static contact, an auxiliary dynamic reed and an auxiliary static contact piece, the isolation cover is arranged between the main loops in an erected mode, an elastic piece used for assisting assembly is further arranged at the top of the isolation cover, the auxiliary static contact pieces and the isolation cover are integrally molded, two ends of the auxiliary static contact pieces are exposed in an injection mode, the top of each auxiliary static contact piece is in interference hard contact with the top of each auxiliary static contact piece, one end of each auxiliary dynamic reed is integrally molded with the top of the pushing rod, and the other end of each auxiliary dynamic reed is in movable contact with the top of each auxiliary static contact piece.

2. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 1, wherein: the elastic sheet is plastic and is of a sheet structure, and is positioned at two ends of the top of the isolation cover.

3. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 1, wherein: the auxiliary movable reed is provided with a convex hull and a slot, the auxiliary static contact piece is Z-shaped, the top of the auxiliary static contact piece is provided with a clamping groove, and the auxiliary static contact is in interference fit with the clamping groove.

4. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 1, wherein: the push rod assembly further comprises a lower bracket, a contact spring, an active contact bridge and an upper bracket, wherein the lower bracket is integrated with the push rod in an injection molding mode, the contact spring is arranged on the lower bracket, the active contact bridge is arranged on the contact spring, and the upper bracket is sleeved on the active contact bridge and riveted with the lower bracket.

5. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 4, wherein: the push rod assembly further comprises a ceramic assembly and a magnetic pole piece assembly, wherein the upper part of the push rod assembly is positioned in the ceramic assembly, and the lower part of the push rod assembly penetrates through a through hole in the middle of the magnetic pole piece assembly.

6. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 5, wherein: the ceramic component comprises ceramic, a main static contact integrally welded in a hole on the ceramic and a connecting ring welded below the ceramic, wherein two ends of the main contact bridge are in movable contact with the main static contact, and the movable stroke is larger than that of the auxiliary movable reed, so that the auxiliary loop is conducted before the main loop.

7. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 6, wherein: the magnetic pole piece assembly comprises a magnetic pole piece, a counter-force spring, a static iron core, a sleeve and a movable iron core, wherein the static iron core is fixed with a middle hole of the magnetic pole piece, a through hole is formed in the middle of the static iron core, the sleeve is welded with the magnetic pole piece, and the movable iron core is positioned below the ceramic assembly and welded with the connecting ring.

8. A high voltage dc relay having a function of monitoring an operation state of a main circuit according to claim 7, wherein: the reaction spring and the movable iron core penetrate through the lower part of the push rod, the bottom of the push rod is fixed with the movable iron core, the reaction spring is compressed by the static iron core and the movable iron core to form a certain compression amount, and the sleeve is sleeved outside the movable iron core and the static iron core.