CN115527805A - Air hole structure of sealed relay and device for sealing air hole - Google Patents
Air hole structure of sealed relay and device for sealing air hole Download PDFInfo
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- CN115527805A CN115527805A CN202211299633.8A CN202211299633A CN115527805A CN 115527805 A CN115527805 A CN 115527805A CN 202211299633 A CN202211299633 A CN 202211299633A CN 115527805 A CN115527805 A CN 115527805A
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- air
- relay
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- hole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/023—Details concerning sealing, e.g. sealing casing with resin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
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- Manufacturing & Machinery (AREA)
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- Electromagnetism (AREA)
- Manufacture Of Switches (AREA)
Abstract
The invention relates to a breather hole structure of a sealed relay, which comprises a breather hole arranged on a relay shell and a plastic plug capable of being inserted into the breather hole; the plastic plug comprises a cylinder body with the diameter same as the inner diameter of the air holes and a cap body which is arranged at the rear end of the cylinder body and has the diameter larger than the inner diameter of the air holes; an air passage is arranged in the cylinder body; one end of the air passage is led out from the front end of the cylinder, and the other end of the air passage is led out from the outer circumferential surface of the cylinder close to the cap body; this canned type relay's bleeder vent structure and device of sealing bleeder vent not only can be in the inside hot-air of discharge that relay assembly rubberizing stoving stage can be convenient, seal the bleeder vent that moreover can be quick, at this in-process, need not high highlight or high hot gas, utilize instantaneous negative pressure and vortex effect can realize that quick, simple, the complete sealing of bleeder vent, can show improvement seal efficiency, seal effectually, and can ensure operating personnel's safety.
Description
Technical Field
The invention relates to the field of electric elements, in particular to an air hole structure of a sealed relay and a device for sealing an air hole.
Background
A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount meets a predetermined requirement. It has an interactive relationship between the control system and the controlled system. It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit has the functions of automatic regulation, safety protection, circuit conversion and the like.
In the production process of the sealed relay, after the process of covering the housing is completed, the housing and the base plate or the base are sealed with glue, and then drying treatment is carried out after the glue is sealed, in order to prevent air expanded by heat inside the relay from entering the glue, and to enable the glue to form bubble glue after curing to cause poor sealing, air holes are usually arranged on the housing, the base or the base plate of the sealed relay in advance, the air inside the relay is discharged from the air holes during drying treatment, and then the air holes are sealed.
In the prior art, the UV glue is generally adopted to be matched with an ultraviolet lamp for curing, but the technology has the following defects: firstly, in order to achieve curing quickly and prevent explosion gas when air holes are sealed, curing can be performed in about 3 seconds only by matching UV glue with purple light; however, the UV adhesive is expensive, the dispensing needle head is easy to stick in the dispensing process, and the dispensing head needs to be cleaned regularly; secondly, the UV adhesive is cured by an ultraviolet lamp, the power of the ultraviolet lamp is high, the power consumption is high, and the UV adhesive is harmful to the body and mind of an operator when working under the environment of the ultraviolet lamp for a long time; thirdly, UV glues and relay case, because of the reason of different materials, UV glues the solidification rear surface and can be harder, can come unstuck when receiving external shock, causes the not firm drawback of bonding.
Patent application No. 201210497320.3 discloses an air hole structure of a sealing type relay and an air hole sealing method thereof, wherein the air hole structure is a hollow convex column arranged on a relay shell, a spotlight is preset above the air hole, a light screen is preset between the air hole and the spotlight, the light screen is provided with a light hole, so that the spotlight just irradiates the air hole position of the relay, and the rest parts cannot be heated by spotlight; the power of the spotlight is 150W, the focus point is 28-32 mm, the energy of the spotlight is not enough to melt the plastic on the surface of the air hole within 1 second, but the heat is not generated inside the relay, the riveting tool is pressed down and kept for a certain time, so that the plastic of the air hole is adhered and molded, and the purpose of sealing the air hole is achieved.
However, the method for sealing the air holes has the following problems: firstly, strong light emitted by the spotlight generates light pollution, and causes harm to eyes of workers; secondly, for the relay with white or light color, the light absorbing capacity of the relay is greatly weakened, and the plastic material of the air holes can not reach the melting temperature and can not be sealed.
Therefore, the patent application No. 201710366641.2 discloses a hot melting mechanism for sealing a relay vent and a method for sealing the vent, wherein a nitrogen heater in a nitrogen blowing device is used for heating nitrogen and then blowing and hot melting a vent convex column to achieve the effect of sealing the vent.
However, nitrogen gas needs to be heated to a very high temperature to perform hot melting on the vent convex column, so that not only can operators be easily scalded, but also other parts of the shell are easily scalded carelessly, and high-temperature nitrogen gas blown into the relay through the vent hole can easily damage other internal parts and structures, particularly plastic parts, rubber parts or tin soldering with low melting points.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the air hole structure of the sealed relay and the device for sealing the air hole, the air hole structure of the sealed relay and the device for sealing the air hole not only can conveniently discharge internal hot air in the gluing and drying stage of relay assembly, but also can quickly seal the air hole, in the process, high strong light or high hot air is not needed, the air hole can be quickly, simply and completely sealed by utilizing instantaneous negative pressure and eddy effect, the sealing efficiency can be obviously improved, the sealing effect is good, and the safety of operators can be ensured.
The technical scheme of the invention is as follows:
a breather hole structure of a sealed relay comprises a breather hole arranged on a relay shell and a plastic plug which can be inserted into the breather hole; the plastic plug comprises a cylinder body with the diameter same as the inner diameter of the air holes and a cap body which is arranged at the rear end of the cylinder body and has the diameter larger than the inner diameter of the air holes; an air passage is arranged in the cylinder body; one end of the air passage is led out from the front end of the cylinder, and the other end of the air passage is led out from the outer circumferential surface of the cylinder close to the cap body.
The air holes comprise narrow holes which are close to the outer end face of the shell and are inserted and matched with the column body and inner counter bores which are close to the inner end face of the shell and have inner diameters larger than the outer diameter of the cap body; and an annular counter bore is arranged on the outer end face of the shell around the narrow hole.
Wherein, the position of the column body near the front end is internally provided with an annular metal conductor.
Wherein the annular metal conductor is encapsulated simultaneously with the injection molding of the plastic plug.
The air passages are formed by air inlets which are communicated with the outer circumferential surface of the cylinder close to the cap body and are distributed in a centrosymmetric mode by using the central axis of the cylinder.
A device for sealing the air holes of a relay is applied to the air hole structure of the sealed relay and comprises an annular head part and an air suction nozzle; the annular head can be inserted and matched with the annular counter bore; the air suction nozzle is arranged at the rear part in a cavity enclosed by the annular head part; a conductor ring is embedded in the annular head; alternating current is conducted to the conductor coil; the air suction nozzle is communicated with an external air suction device; the air extraction mode of the external air extraction device is pulse instantaneous air extraction.
The annular head main body is made of rigid insulating materials, and the end part of the annular head main body is made of deformation sealing materials.
Wherein, the rigid insulation material is plastics, and the deformation sealing material is silica gel or rubber.
The relay can be placed on a tool clamp at a fixed position, and the mechanism is pushed by an air cylinder to stretch out and draw back, so that the annular head is just inserted into and matched with the annular counter bore.
The air hole sealing method of the mechanism comprises the following steps:
(1) before assembling the relay rear shell, inserting the plastic plug into the narrow hole from inside to outside through the inner counter bore part, wherein the insertion depth is based on the fact that the air passage can be communicated with the inside and the outside;
(2) drying the relay after gluing and mounting the rear shell, wherein in the drying process, heated air in the relay can be discharged from an air passage;
(3) after the relay is cooled and when the air holes need to be sealed, the relay is placed on a tool clamp, so that the positions of the air holes are uniform, an air cylinder driving mechanism moves forwards, the annular head is just inserted and extruded with the annular counter bore, and the deformation sealing material at the end part of the annular head ensures that air does not leak between the annular head and the annular counter bore;
(4) the external air extractor rapidly extracts air outwards through the air suction nozzle in a pulse mode, and the plastic plug is pushed outwards by air in the relay under the action of instant negative pressure, so that the column is completely inserted into the narrow hole, and the air passage is sealed by the inner wall of the narrow hole;
(5) the external circuit passes high-frequency alternating current to the conductor ring, and the annular metal conductor just positioned in the enclosing range of the conductor ring is rapidly heated at a very high speed through the eddy current effect at the moment to melt the cylinder around the conductor ring, so that the cylinder and the narrow hole are welded, and the air holes are completely closed.
The invention has the following beneficial effects:
1. the invention can conveniently discharge internal hot air in the relay assembling, gluing and drying stage, and can rapidly seal the air holes, in the process, high light or high hot air is not needed, rapid, simple and complete sealing of the air holes can be realized by using instantaneous negative pressure and vortex effect, the sealing efficiency can be obviously improved, the sealing effect is good, and the safety of operators can be ensured.
2. The invention applies the plastic plug, skillfully designs the structure of the narrow hole, the inner counter bore and the plastic plug, not only leads the plastic plug to realize ventilation when in need, but also leads the plastic plug to instantly block the ventilation hole by simply utilizing the action of instant negative pressure, thus leading the plastic plug to cut off the internal and external ventilation; and use the plastics embolism only to melt its surface can realize the butt fusion with the slot inner wall, the shutoff can be realized by the structure of plastics embolism itself in most region, consequently avoided in the contrast file bleeder vent to melt the projection completely and just can realize the hole sealing, not only the shutoff speed is faster, and the cooperation just together moulds plastics including annular metallic conductor at the injection moulding stage in addition, utilize the vortex effect, can very quick melt plastics embolism surface and with the even butt fusion of bleeder vent, not only sealed fast, sealed effectual, and the sealed department is level and smooth pleasing to the eye moreover.
3. The device for sealing the air holes is specially designed aiming at a novel air hole structure, the structure is simple and compact, the cost is low, the operation is easy and safe, the annular head and the annular counter bore can be quickly inserted and extruded, then a sealing space is formed outside the air holes, the air suction nozzle is used for instantly sucking air to form negative pressure so that the plastic plug completely seals the air holes, meanwhile, the conductor ring integrated on the annular head can quickly empty and heat the annular metal conductor by using the eddy current effect, so that spontaneous hot melting sealing is realized, the process is not only quick in speed, but also high in efficiency in an action area, the damage to the rest areas of the shell can be avoided, the safety of operators can be guaranteed, the automation is very easy to realize, the technical requirement is low, and the cost is low.
Drawings
FIG. 1 is a schematic diagram of a relay according to the present invention;
FIG. 2 is a schematic view of the vent of the present invention;
FIG. 3 is a schematic structural view of the plastic plug of the present invention;
FIG. 4 is a schematic view of the plastic plug and the vent hole of the present invention in an unsealed state;
FIG. 5 is a schematic diagram of the plastic plug and the vent hole of the present invention in a closed state;
FIG. 6 is a schematic structural diagram of the device for sealing the vent hole of the relay according to the present invention;
FIG. 7 is a schematic view of the relay vent closing apparatus of the present invention just after being inserted into the annular counterbore;
fig. 8 is a schematic diagram of the device for sealing the air hole of the relay, which is disclosed by the invention, when the plastic plug completely seals the air hole.
The reference numbers in the figures denote:
1. a housing; 11. a narrow hole; 12. an inner counter bore; 2. air holes are formed; 3. plastic plug; 31. a cylinder; 311. an airway; 312. an annular metal conductor; 32. a cap body; 4. an annular counter bore; 5. an annular head; 6. a suction nozzle; 7. and a conductor loop.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 8, an air hole structure of a sealed relay includes an air hole 2 provided on a relay housing 1 and a plastic plug 3 capable of being inserted into the air hole 2; the plastic plug 3 comprises a cylinder 31 with the diameter same as the inner diameter of the air hole 2 and a cap body 32 which is arranged at the rear end of the cylinder 31 and has the diameter larger than the inner diameter of the air hole 2; an air passage 311 is arranged in the cylinder 31; one end of the air passage 311 is communicated with the front end of the column 31, and the other end is communicated with the outer circumference of the column 31 close to the cap body 32.
Further, the air holes 2 comprise narrow holes 11 which are close to the outer end surface of the shell 1 and are inserted into the column 31, and inner counter bores 12 which are close to the inner end surface of the shell 1 and have inner diameters larger than the outer diameter of the cap body 32; the outer end face of the shell 1 is provided with an annular counter bore 4 around the narrow hole 11.
Further, a ring-shaped metal conductor 312 is disposed inside the cylinder 31 near the front end.
Further, the annular metal conductor 312 is encapsulated at the same time as the plastic plug 3 is injection molded.
Furthermore, the air passages 311 are formed by air inlets formed on the outer circumferential surface of the cylinder 31 near the cap body 32 and are distributed in a central symmetry manner around the central axis of the cylinder 31.
A device for sealing the air holes of a relay is applied to the air hole structure of the sealed relay and comprises an annular head part 5 and an air suction nozzle 6; the annular head part 5 can be inserted and matched with the annular counter bore 4; the air suction nozzle 6 is arranged at the rear part in a cavity enclosed by the annular head part 5; a conductor ring 7 is embedded in the annular head part 5; alternating current is conducted to the conductor ring 7; the air suction nozzle 6 is communicated with an external air suction device; the air exhaust mode of the external air exhaust device is pulse instantaneous air exhaust.
Furthermore, the annular head 5 is made of rigid insulating material, and the end part of the annular head is made of deformation sealing material.
Furthermore, the rigid insulation material is plastic, and the deformation sealing material is silica gel or rubber.
Furthermore, the relay can be placed on a tool clamp at a fixed position, and the mechanism is pushed by an air cylinder to stretch and retract, so that the annular head 5 is just inserted into the annular counter bore 4.
Further, the air hole sealing method of the mechanism comprises the following steps:
(1) referring to fig. 4, before the relay rear shell is assembled, the plastic plug 3 is inserted into the narrow hole 11 from inside to outside through the inner counterbore 12, and the insertion depth is determined according to the condition that the air passage 311 can be communicated with the inside and the outside;
(2) drying the relay after gluing and mounting the rear shell, wherein in the drying process, heated air in the relay can be discharged from the air passage 311;
(3) referring to fig. 7, after the relay is cooled, when the air holes 2 need to be sealed, the relay is placed on a tooling fixture, so that the positions of the air holes 2 are uniform, the cylinder driving mechanism moves forwards, the annular head 5 is just inserted and extruded with the annular counter bore 4, and the deformation sealing material at the end part of the annular head 5 ensures that no air is leaked between the annular head 5 and the annular counter bore 4;
(4) referring to fig. 8, the external air-extracting device rapidly extracts air by pulse through the air-sucking nozzle 6, and the plastic plug 3 is pushed outwards by the air inside the relay under the action of the instant negative pressure, so that the cylinder 31 is completely inserted into the narrow hole 11, and the air passage 311 is closed by the inner wall of the narrow hole 11;
(5) the external circuit passes a high-frequency alternating current to the conductor ring 7, and the annular metal conductor 312, which is just within the range surrounded by the conductor ring 7 at this time, is rapidly heated at an extremely high speed by the eddy current effect, melting the cylinder 31 around it, fusing the cylinder 31 and the narrow hole 11, and thus completely closing the ventilation hole 2.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. The utility model provides a bleeder vent structure of canned type relay which characterized in that: comprises an air hole (2) arranged on a relay shell (1) and a plastic plug (3) which can be inserted into the air hole (2); the plastic plug (3) comprises a cylinder (31) with the diameter same as the inner diameter of the air hole (2) and a cap body (32) which is arranged at the rear end of the cylinder (31) and has the diameter larger than the inner diameter of the air hole (2); an air channel (311) is arranged in the cylinder (31); one end of the air passage (311) is led out from the front end of the column body (31), and the other end of the air passage is led out from the outer circumferential surface of the column body (31) close to the cap body (32).
2. The air-vent structure of a sealed relay according to claim 1, wherein: the air holes (2) comprise narrow holes (11) which are close to the outer end face of the shell (1) and are inserted and matched with the column body (31) and inner counter bores (12) which are close to the inner end face of the shell (1) and have inner diameters larger than the outer diameter of the cap body (32); an annular counter bore (4) is arranged on the outer end face of the shell (1) around the narrow hole (11).
3. The vent structure of a sealed relay according to claim 1, wherein: an annular metal conductor (312) is arranged in the position, close to the front end, of the cylinder (31).
4. The air-vent structure of a sealed relay according to claim 1, wherein: the annular metal conductor (312) is encapsulated during injection molding of the plastic plug (3).
5. The air-vent structure of a sealed relay according to claim 1, wherein: the air passages (311) are formed by air inlets which are communicated with the outer circumferential surface of the cylinder body (31) close to the cap body (32) and are distributed in a centrosymmetric manner by taking the central axis of the cylinder body (31) as the center.
6. The utility model provides a device of closed relay bleeder vent is applied to canned type relay's bleeder vent structure, its characterized in that: comprises an annular head (5) and a suction nozzle (6); the annular head (5) can be inserted and matched with the annular counter bore (4); the air suction nozzle (6) is arranged at the rear part in a cavity enclosed by the annular head part (5); a conductor ring (7) is embedded in the annular head (5); alternating current is conducted to the conductor ring (7); the air suction nozzle (6) is communicated with an external air suction device; the air exhaust mode of the external air exhaust device is pulse instantaneous air exhaust.
7. The device for closing the vent hole of the relay as claimed in claim 6, wherein: the annular head (5) is made of rigid insulating materials, and the end part of the annular head is made of deformation sealing materials.
8. The device for closing the vent of the relay according to claim 7, wherein: the rigid insulation material is plastic, and the deformation sealing material is silica gel or rubber.
9. The device for closing the vent of the relay according to claim 7, wherein: the relay can be placed on a tool clamp at a fixed position, and the mechanism is pushed by an air cylinder to stretch out and draw back, so that the annular head (5) is just inserted into the annular counter bore (4).
10. The apparatus for closing a relay vent of claim 9, wherein: the vent sealing method of the mechanism comprises the following steps:
(1) before the relay rear shell is assembled, the plastic plug (3) is partially inserted into the narrow hole (11) from inside to outside through the inner counter bore (12), and the insertion depth is determined according to the condition that the air passage (311) can be communicated with the inside and the outside;
(2) drying the relay after gluing and mounting the rear shell, wherein in the drying process, heated air in the relay can be discharged through an air passage (311);
(3) after the relay is cooled, when the air holes (2) need to be sealed, the relay is placed on a tool fixture, so that the positions of the air holes (2) are uniform, the cylinder driving mechanism moves forwards, the annular head (5) is just inserted and extruded with the annular counter bore (4), and the deformation sealing material at the end part of the annular head (5) ensures that no air is leaked between the annular head (5) and the annular counter bore (4);
(4) the external air extracting device rapidly extracts air outwards through the air suction nozzle (6) in a pulse mode, and the plastic plug (3) is pushed outwards by air in the relay under the action of instant negative pressure, so that the cylinder (31) is completely inserted into the narrow hole (11), and the air channel (311) is closed by the inner wall of the narrow hole (11);
(5) the external circuit passes high-frequency alternating current to the conductor ring (7), and the annular metal conductor (312) which is just positioned in the enclosing range of the conductor ring (7) is rapidly heated at a very high speed by the eddy current effect to melt the cylinder (31) around the conductor ring, so that the cylinder (31) and the narrow hole (11) are welded, and the air hole (2) is completely closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211299633.8A CN115527805A (en) | 2022-10-24 | 2022-10-24 | Air hole structure of sealed relay and device for sealing air hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211299633.8A CN115527805A (en) | 2022-10-24 | 2022-10-24 | Air hole structure of sealed relay and device for sealing air hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115527805A true CN115527805A (en) | 2022-12-27 |
Family
ID=84703099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211299633.8A Pending CN115527805A (en) | 2022-10-24 | 2022-10-24 | Air hole structure of sealed relay and device for sealing air hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115527805A (en) |
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2022
- 2022-10-24 CN CN202211299633.8A patent/CN115527805A/en active Pending
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