CN108899249B - Relay, relay vacuumizing and inflating system and relay vacuumizing and inflating method - Google Patents
Relay, relay vacuumizing and inflating system and relay vacuumizing and inflating method Download PDFInfo
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- CN108899249B CN108899249B CN201810761870.9A CN201810761870A CN108899249B CN 108899249 B CN108899249 B CN 108899249B CN 201810761870 A CN201810761870 A CN 201810761870A CN 108899249 B CN108899249 B CN 108899249B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 280
- 238000009434 installation Methods 0.000 claims abstract description 121
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 22
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 229940125898 compound 5 Drugs 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the field of piezoelectric devices, in particular to a relay, which comprises a housing and a base fixedly connected with the housing, wherein the housing and the base are matched to form a closed installation space; the base is provided with the inflation inlet, the inflation inlet is internally provided with the elastic sealing body in interference fit with the inflation inlet, the outer side of the elastic sealing body is tightly attached to the inner side of the inflation inlet, the air needle penetrates through the middle of the elastic sealing body, and the relay is vacuumized or inflated for the installation space, and the elastic sealing body forms the first seal of the inflation inlet, so that the continuity of vacuumizing operation, inflating operation and sealing operation of the relay is improved, the operation efficiency is improved, and the air tightness of the vacuumizing and inflating operation of the relay is ensured; the vacuum-pumping system of the relay is simple and convenient to operate, high in working efficiency and good in product air tightness; the vacuum pumping and inflating method for the relay is simple to operate, good in feasibility, suitable for automatic production, good in air tightness and high in qualification rate.
Description
Technical Field
The invention relates to the technical field of piezoelectric devices, in particular to a relay, a relay vacuumizing and inflating system for vacuumizing and inflating the relay, and a relay vacuumizing and inflating method using the system.
Background
After the existing relay is vacuumized and filled with inert gas, the inert gas leaks out or external gas is mixed into the product due to unbalanced internal and external gas pressure of the relay, so that the sealing effect of the product is affected, and the arc extinguishing effect of the product is further affected.
The existing low-pressure sealing relay filled with inert gas is mostly sealed by adopting solid sealing glue, and few of the low-pressure sealing relays are sealed by adopting a melting matrix material, and the operation of the low-pressure sealing relay is complex no matter which sealing mode is adopted, the continuity of the vacuumizing, inflating and sealing operation of the relay is poor, the production efficiency is affected, and the risks of discharging (positive internal gas pressure) or mixing (negative internal gas pressure) of the inert gas in the product exist in the process from the fact that the vacuum of the relay is pumped to the fact that the inert gas is filled into the relay is sealed, so that the arc extinguishing performance of the relay is affected; the relay sealed by the solid sealing glue is easy to generate solid sealing glue bulge (internal gas positive pressure) or glue liquid leaks into the relay (internal gas negative pressure) due to the influence of the internal gas positive pressure or negative pressure of the relay, so that the normal use of the product is influenced and even the functional failure occurs; the relay adopting the matrix fusion sealing has the problems of gas leakage or air mixing, and the process requirement of the matrix fusion method is high and is not suitable for matrix materials made of thermosetting materials (the thermosetting materials cannot be fused and deformed).
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the relay, wherein the elastic sealing body of the relay forms the first seal of the air charging port, so that the continuity of the vacuumizing operation, the air charging operation and the sealing operation of the relay is improved, the operation efficiency is improved, and the air tightness of the vacuumizing operation and the air charging operation of the relay is ensured; the relay vacuumizing inflation system is simple and convenient to operate, high in working efficiency and good in product air tightness; the vacuum pumping and inflating method of the relay is simple to operate, good in feasibility, suitable for automatic production, good in product air tightness and high in qualification rate
In order to achieve the above purpose, the invention adopts the following technical scheme:
a relay comprises a housing 1 and a base 2 fixedly connected with the housing 1, wherein the housing 1 and the base 2 are matched to form a closed installation space 1020;
the base 2 is provided with an inflation inlet 3, an elastic sealing body 4 in interference fit with the inflation inlet 3 is arranged in the inflation inlet 3, the outer side of the elastic sealing body 4 is tightly attached to the inner side of the inflation inlet 3, an air needle 6 penetrates through the middle of the elastic sealing body 4, the air needle 6 is tightly attached to the elastic sealing body 4, the installation space 1020 is vacuumized or inflated, and after the air needle 6 is pulled out, the elastic sealing body 4 is automatically sealed and gas in the installation space 1020 is prevented from escaping.
Preferably, the inflation inlet 3 includes a first hole 30 and a second hole 31, which are communicated, one end of the first hole 30 is communicated with the installation space 1020, one end of the second hole 31 is communicated with the outside, the inner diameter of the first hole 30 is smaller than the inner diameter of the second hole 31, and the elastic sealing body 4 is disposed in the second hole 31.
Preferably, the elastic sealing body 4 is a solid cylinder, the air needle 6 pierces through the elastic sealing body 4 to inflate the installation space 1020, and after the air needle 6 is pulled out, the elastic sealing body 4 rebounds to prevent the gas in the installation space 1020 from escaping.
Preferably, a slit 42 is provided in the middle of the elastic sealing body 4, the slit 42 is disposed along the axial direction of the elastic sealing body 4, two sides of the slit 42 are tightly attached, and the air needle 6 passes through the slit 42 to inflate the installation space 1020.
Preferably, a sealing body jack 49 is arranged in the middle of the elastic sealing body 4, the sealing body jack 49 is arranged along the axial direction of the elastic sealing body 4, the inner diameter of the sealing body jack 49 is smaller than the outer diameter of the air needle 6, one end, close to the installation space 1020, of the sealing body jack 49 is provided with a valve 40, the air needle 6 penetrates through the middle of the sealing body jack 49 to inflate the installation space 1020, when the air pressure in the installation space 1020 is greater than the external atmospheric pressure, after the air needle 6 is pulled out, the valve 40 is automatically closed to prevent the air in the installation space 1020 from escaping.
Preferably, a sealing body jack 49 is arranged in the middle of the elastic sealing body 4, the sealing body jack 49 is arranged along the axial direction of the elastic sealing body 4, the inner diameter of the sealing body jack 49 is smaller than the outer diameter of the air needle 6, a plurality of groups of valves 40 are arranged in the middle of the sealing body jack 49, the air needle 6 passes through the middle of the sealing body jack 49 to inflate the installation space 1020, and when the air pressure in the installation space 1020 is greater than the external atmospheric pressure, after the air needle 6 is pulled out, the valves 40 are automatically closed to prevent the air in the installation space 1020 from escaping.
Preferably, the valve 40 is disposed at the upper end of the elastic sealing body 4, the valve 40 is hemispherical or conical, a gas-passing hole is disposed at the central position of the valve 40, the inner diameter of the gas-passing hole is smaller than the inner diameter of the sealing body insertion hole 49, the thickness of the valve 40 is gradually thickened from the central position to the periphery, and the thickness of the central position is the smallest.
Preferably, a sealing body jack 49 is arranged in the middle of the elastic sealing body 4, the sealing body jack 49 is arranged along the axial direction of the elastic sealing body 4, the inner diameter of the sealing body jack 49 is smaller than the outer diameter of the air needle 6, one end, close to the installation space 1020, of the sealing body jack 49 is provided with a thin-wall tube 41 integrated with the elastic sealing body 4, the thin-wall tube 41 is communicated with the sealing body jack 49, the air needle 6 penetrates through the middle of the sealing body jack 49 to inflate the installation space 1020, and after the air needle 6 is pulled out when the air pressure in the installation space 1020 is larger than the external atmospheric pressure, the thin-wall tube 41 is automatically closed to prevent the air in the installation space 1020 from escaping.
Preferably, the axial interface of the elastic sealing body 4 is in a T-shaped structure, and comprises a sealing body trunk 43 and a sealing body sealing cap 44 arranged at one end of the sealing body trunk 43, wherein a sealing body jack 49 is arranged at one side of the sealing body trunk 43 along the axial direction of the sealing body trunk, the sealing body jack 49 is communicated with an installation space 1020, and the inner diameter of the sealing body jack 49 is smaller than the outer diameter of the air needle 6; the inflation inlet 3 is a circular through hole, the outer diameter of the sealing cap 44 of the sealing body is larger than the inner diameter of the inflation inlet 3, and the main body 43 of the sealing body is inserted and matched in the inflation inlet 3, so that the sealing cap 44 of the sealing body is positioned in the installation space 1020;
the air needle 6 is communicated with the installation space 1020 through the sealing body jack 49, so as to inflate the installation space 1020, the air pressure in the installation space 1020 is higher than the external atmospheric pressure, the air needle 6 is pulled out, and the air pressure in the installation space 1020 forces the sealing body sealing cap 44 to seal the inflation inlet 3, so that the air in the installation space 1020 is prevented from escaping.
A relay vacuumizing and inflating system is used for vacuumizing and inflating any relay and comprises a three-way switch 11, an air needle 6, a vacuum pump 8 and an air storage tank 9 which are respectively connected with the three-way switch 11.
Preferably, the air needle 6, the vacuum pump 8 and the air storage tank 9 are respectively connected with a three-way switch 11 through an air pipe 10.
Preferably, the ejector rod 7 is sleeved outside the air needle 6, the ejector rod 7 and the air needle 6 can slide relatively, and the ejector rod 7 is used for pressing the elastic sealing body 4 towards the direction of the installation space 1020.
Preferably, the three-way switch 11 is a three-way electromagnetic valve.
A relay vacuumizing and inflating method uses any relay vacuumizing and inflating system, and comprises the following steps:
step one: the air needle 6 passes through the elastic sealing body 4 to be communicated with the installation space 1020;
step two A: the vacuum pump 8 vacuumizes the installation space 1020 through the air needle 6;
step three: the air storage tank 9 charges the installation space 1020 through the air needle 6;
step four: after the inflation of the installation space 1020 is completed, the air needle 6 is pulled out.
Preferably, in step three, the ejector rod 7 is always in abutment against the elastic sealing body 4.
Preferably, the method further comprises the step five of: the sealing glue 5 is fixed at the end of the elastic sealing body 4 facing to the outside so as to seal the end of the elastic sealing body 4 facing to the outside, seal the joint between the elastic sealing body 4 and the air charging port 3 and fixedly connect the elastic sealing body 4 with the base 2 of the relay.
Preferably, the method further comprises the step B: the vacuum pump 8 pumps out air in the air pipe 10 between the three-way electromagnetic valve 11 and the air storage tank 9.
According to the relay, the elastic sealing body is arranged in the charging port and is in interference fit with the charging port, the outer side of the elastic sealing body is tightly matched with the inner side of the charging port, the air needle penetrates through the middle of the elastic sealing body, the air needle is tightly attached to the elastic sealing body, no air is mixed into the mounting space when the mounting space is vacuumized, the elastic sealing body is automatically sealed after the air needle is pulled out after the air needle is completely inflated when the mounting space is inflated, the air in the mounting space is prevented from escaping, the anaerobic environment in the mounting space is ensured, the continuity of vacuumizing operation, inflating operation and sealing operation of the relay is facilitated to be improved, and the operation efficiency is improved. And after the relay is inflated, when the inflation port and the elastic sealing body are used for dispensing, the volatilized gas of the glue solution can not be immersed into the product, and the contact resistance in the relay can not be influenced. The relay vacuumizing and inflating system is simple in structure and convenient to operate, can continuously realize vacuumizing and inflating operation of the relay, is beneficial to improving production efficiency, and ensures the air tightness of the relay in the whole operation process, and the air tightness of the relay after inflation is good. The vacuum pumping and inflating method for the relay is simple to operate, good in feasibility, suitable for automatic production, good in air tightness and high in qualification rate.
Drawings
FIG. 1 is a schematic view of the structure of a relay of the present invention;
FIG. 2 is a schematic diagram of the structure of portion A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic diagram of the structure of the relay vacuumizing inflation system of the present invention;
FIG. 4 is a schematic diagram of the cooperation of the air needle, the ejector rod and the relay;
FIG. 5 is a schematic view of the structure of portion B of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic diagram of the structure of the relay of the present invention after the mounting space is inflated and the sealing glue seals the inflation inlet;
FIG. 7 is a schematic view of the structure of a first embodiment of the elastic sealing body of the present invention;
FIG. 8 is a schematic view of the structure of a second embodiment of the elastic sealing body of the present invention;
FIG. 9 is a schematic view of the structure of a third embodiment of the elastic sealing body of the present invention;
FIG. 10 is a schematic view of the structure of a fourth embodiment of the elastic sealing body of the present invention;
FIG. 11 is a schematic view of the structure of a fifth embodiment of the elastic sealing body of the present invention;
FIG. 12 is a schematic view of a sixth embodiment of an elastomeric seal of the present invention;
fig. 13 is another structural schematic view of the first embodiment of the elastic sealing body of the present invention.
Detailed Description
Embodiments of the relay of the present invention are further described below in conjunction with the examples set forth in figures 1-2 and 3-12. The relay of the present invention is not limited to the description of the following embodiments.
The relay comprises a housing 1 and a base 2 fixedly connected with the housing 1, wherein the housing 1 and the base 2 form a closed installation space 1020;
the base 2 is provided with an inflation inlet 3, an elastic sealing body 4 in interference fit with the inflation inlet is arranged in the inflation inlet 3, the outer side of the elastic sealing body 4 is tightly attached to the inner side of the inflation inlet 3, an air needle 6 penetrates through the middle of the elastic sealing body 4, the air needle 6 is tightly attached to the elastic sealing body 4, the installation space 1020 is vacuumized or inflated, and after the air needle 6 is pulled out, the elastic sealing body 4 automatically seals to prevent gas in the installation space 1020 from escaping.
According to the relay disclosed by the invention, the elastic sealing body 4 is arranged in the air charging port 3, the elastic sealing body 4 is in interference fit with the air charging port 3, the outer side of the elastic sealing body 4 is tightly matched with the inner side of the air charging port 3, the air needle 6 passes through the middle of the elastic sealing body 4, the air needle 6 is tightly attached to the elastic sealing body 4, no air is mixed into the installation space 1020 when the installation space 1020 is vacuumized, the air needle 6 is pulled out after the air charging is finished when the installation space 1020 is inflated, the elastic sealing body 4 is automatically sealed, the air in the installation space 1020 is prevented from escaping, the anaerobic environment in the installation space 1020 is ensured, and the volatile gas of glue solution is not immersed into a product when the air charging port 3 and the elastic sealing body 4 are in dispensing after the air charging of the relay is finished, so that the contact resistance in the relay is not influenced.
As shown in fig. 1-2, is one embodiment of the relay of the present invention.
As shown in fig. 1, the relay comprises a housing 1 above and a base 2 below, wherein the housing 1 and the base 2 are fixedly connected to form a closed installation space 1020, necessary components of the relay, including an electromagnet assembly, a yoke, an armature assembly, a static contact, a reaction device and the like, are accommodated in the installation space 1020, an inflation port 3 is arranged on the base 2, an elastic sealing body 4 is arranged in the inflation port 3, the elastic sealing body 4 is in interference fit with the inflation port 3, the outer side of the elastic sealing body 4 is tightly attached to the inner side of the inflation port 3 so as to ensure the air tightness of the installation space 1020, when the air needle 6 passes through the elastic sealing body 4 to vacuumize the installation space 1020, the air needle 6 is tightly attached to the elastic sealing body 4 to avoid air from mixing into the installation space 1020, and after the air needle 6 is inflated in the installation space 1020, the air needle 6 is pulled out, and the elastic sealing body 4 is automatically sealed to form the first seal of the installation space 1020.
Preferably, as shown in fig. 2, the inflation inlet 3 includes a first hole 30 above and a second hole 31 below, the first hole 30 and the second hole 31 are communicated, the inner diameter of the first hole 30 is smaller than the inner diameter of the second hole 31, an annular table top is formed at the joint of the first hole 30 and the second hole 31, the elastic sealing body 4 is arranged in the second hole 31, and the upper end is in contact connection with the annular table top. Further preferably, the first hole 30 and the second hole 31 are coaxial and coaxial with the elastic sealing body 4.
Preferably, as shown in fig. 2, the length of the elastic sealing body 4 is smaller than the length of the second hole 31, the portion, located at the lower end of the elastic sealing body 4 and the lower end of the second hole 31, of the second hole 31 is used for injecting the sealing compound 5, after the installation space 1020 is inflated, the second sealing of the installation space 1020 is formed, so that the elastic sealing body 4 and the joint between the elastic sealing body 4 and the inflation port 3 can be better sealed, the elastic sealing body 4 can be reliably kept in the inflation port 3 of the base 2, the gas in the installation space 1020 is prevented from escaping from the joint between the elastic sealing body 4 and/or the elastic sealing body 4 and the inflation port 3, the anaerobic environment in the installation space 1020 is ensured, and in addition, when the sealing compound 5 is injected, the condition that the volatilized gas of the sealing compound 5 enters the installation space 1020 and the contact resistance inside the relay is influenced is avoided because the elastic sealing body 4 is tightly matched with the inflation port 3.
Under the double sealing effects of the first seal and the second seal, the relay can maintain good sealing performance for a long time, and the service life of the relay is obviously prolonged. The relay is also beneficial to improving the continuity of the vacuumizing operation, the inflating operation and the sealing operation of the relay, is beneficial to improving the operation efficiency, is more beneficial to automatic production and improves the production efficiency.
As shown in fig. 7-12, there are 6 embodiments of the elastomeric seal body 4 of the present invention. It should be noted that the elastic sealing body 4 is not limited to these 6 embodiments, and other elastic sealing bodies 4 with simple shape changes or obvious and obvious structural improvements should fall within the scope of the present invention. The following will describe 6 examples of the elastomer 4 according to the invention.
As shown in fig. 7, a first embodiment of the elastic sealing body 4 of the present invention is shown.
The elastic sealing body 4 is in a cylindrical structure, a sealing body jack 49 is arranged in the middle of the elastic sealing body 4, the sealing body jack 49 is arranged along the axial direction of the elastic sealing body 4, the inner diameter of the sealing body jack 49 is smaller than the outer diameter of the air needle 6, so that when the air needle 6 passes through the sealing body jack 49, the inner side of the sealing body jack 49 is tightly matched with the outer side of the air needle 6, air is prevented from being mixed into the installation space 1020 when the installation space 1020 is vacuumized, a valve 40 is arranged at the upper end of the sealing body jack 49, after the air needle 6 is filled with air into the installation space 1020, and when the air pressure is higher than the external atmospheric pressure, the valve 40 is closed under the forcing of the internal air pressure of the installation space 1020 after the air needle 6 is pulled out, so that the air is prevented from escaping, and the first seal of the installation space 1020 is formed.
Preferably, as shown in fig. 13, the valve 40 is disposed at the upper end of the elastic sealing body 4, the valve film 40 is hemispherical or conical, the central position of the valve film 40 is provided with a gas-passing hole, the inner diameter of the gas-passing hole is far smaller than the inner diameter of the sealing body insertion hole 49, the thickness of the valve 40 gradually thickens from the central position to the periphery, the thickness of the central position is minimum, the installation space 1020 is filled with gas, and the gas pressure in the installation space 1020 is greater than the external atmospheric pressure, the gas pressure in the installation space 1020 presses the valve 40, so that the gas-passing hole is forced to be closed, and the first seal of the installation space is formed.
As shown in fig. 8, a second embodiment of the elastic sealing body 4 of the present invention is shown.
The second embodiment differs from the first embodiment in that: the upper end of the sealing body insertion hole 49 is not provided with the valves 40, but a plurality of groups of valves 40 are arranged in the middle of the sealing body insertion hole 49, so that the sealing performance is further improved compared with the first embodiment.
As shown in fig. 9, a third embodiment of the elastic sealing body 4 of the present invention is shown.
The third embodiment differs from the first embodiment in that: the valve 40 is not disposed at the upper end of the sealing body insertion hole 49, but a thin-walled tube 41 is disposed, the thin-walled tube 41 and the elastic sealing body 4 are integrally formed, the thin-walled tube 41 is communicated with the sealing body insertion hole 49, when the air needle 6 is filled with air into the installation space 1020 and the air pressure in the installation space 1020 is greater than the external atmospheric pressure, the thin-walled tube 41 is flattened under the action of the internal air pressure in the installation space 1020 after the air needle 6 is pulled out, so as to form a first seal. Preferably, the inner diameter of the thin-walled tube 41 is smaller than or equal to the inner diameter of the sealing body insertion hole 49.
As shown in fig. 10, a fourth embodiment of the elastic sealing body 4 of the present invention is shown.
The elastic sealing body 4 is a solid cylinder and is arranged in the air charging opening 3 and matched with the air charging opening 3 in an excessive way, the annular side of the elastic sealing body 4 is tightly attached to the inner side of the air charging opening 3, the air needle 6 pierces through the elastic sealing body 4, the air needle 6 is tightly attached to the elastic sealing body, the installation space 1020 is vacuumized and/or inflated, after the installation space is completely filled, the air needle 6 is pulled out, and the elastic sealing body 4 automatically rebounds to form a first seal.
As shown in fig. 11, a fifth embodiment of the elastic sealing body 4 of the present invention is shown.
The fifth embodiment differs from the fourth embodiment in that: the middle part of the elastic sealing body 4 is provided with a slit 42, two sides of the slit 42 are tightly matched, the air needle 6 passes through the slit 42 and is tightly attached to the inner side of the slit 42, the installation space 1020 is vacuumized and/or inflated, the air needle 6 can pass through more conveniently, and after the air needle 6 is pulled out, two sides of the slit are rebound tightly closed, so that a first seal is formed.
As shown in fig. 12, a sixth embodiment of the elastic sealing body 4 of the present invention is shown.
The shaft section of the elastic sealing body 4 is of a T-shaped structure, the T-shaped structure comprises a sealing body main body 43 inserted in the air charging port 3 and a sealing body sealing cap 44 arranged on the upper portion of the sealing body main body 43 and connected with the sealing body main body, a sealing body inserting hole 49 is formed between the sealing body main body 43 and the air charging port 3, an air needle 6 is inserted into the air charging port 3 from the sealing body inserting hole 49, the ejector rod 7 jacks up the elastic sealing body 4, the air needle 6 is tightly attached to the sealing body inserting hole 49, the installation space 1020 is vacuumized and/or inflated, the air pressure in the installation space 1020 is greater than the external atmospheric pressure after the air charging of the installation space 1020 is finished, the air needle 6 is pulled out, and the air pressure in the installation space 1020 forces the sealing body sealing cap 44 to tightly seal the upper port of the air charging port 3, so that the first sealing is formed. It should be noted that the inflation port 3 mated with the elastic sealing body 4 of the sixth embodiment is a circular through hole, the sealing body trunk 43 of the elastic sealing body 4 is inserted into the inflation port 3, the outer diameter of the sealing body trunk 43 is matched with the inner diameter of the inflation port 3, and the outer diameter of the sealing body sealing cap 44 of the elastic sealing body 4 is > the inner diameter of the inflation port 3.
Preferably, the elastic sealing body 4 of the present invention is made of a material with high elasticity, such as rubber, silica gel, fluorine gel, and latex.
As shown in FIG. 3, the invention also discloses a relay vacuumizing and inflating system which is used for vacuumizing and inflating any relay.
The relay vacuumizing system comprises a three-way switch 11, an air needle 6, a vacuum pump 8 and an air storage tank 9, wherein the air needle 6, the vacuum pump 8 and the air storage tank 9 are respectively connected with the three-way switch 11 through an air pipe 10, the vacuum pump 8 vacuumizes the relay through the air needle 6, and the air storage tank 9 inflates the relay through the air needle 6.
Preferably, the three-way switch 11 is a three-way electromagnetic valve.
Preferably, as shown in fig. 3, the ejector rod 7 is sleeved outside the air needle 6, the ejector rod 7 and the air needle 6 slide relatively, and the ejector rod 7 is used for pressing the elastic sealing body 4.
Preferably, the relay vacuumizing and inflating system further comprises an air needle driving device for driving the air needle 6 to be inserted into/pulled out of the inflating opening 3 and an ejector rod driving device for driving the ejector rod 7 to press/release the elastic sealing body 4.
Preferably, the gas storage tank 9 is used for storing inert gas, hydrogen, SF6 or water vapor.
Preferably, the gas storage tank 9 can be replaced by a gas generating device.
The invention also discloses a relay vacuumizing and inflating method, which uses any relay vacuumizing and inflating system to vacuumize and inflate the relay.
The invention discloses a relay vacuumizing and inflating method, which comprises the following steps of:
step one: the air needle 6 passes through the elastic sealing body 4 so that the air needle 6 communicates with the installation space 1020.
Step two A: the vacuum pump 8 vacuums the installation space 1020 through the air needle 6.
Step two, B: the vacuum pump 8 pumps out air from the air pipe 10 between the three-way switch 11 and the air storage tank 9 through the three-way switch 11.
It should be noted that the operation of step B is generally used for the first time when the air tank 9 is used to inflate the installation space 1020, and if the plurality of relays are continuously evacuated and inflated, the operation of step B is not required before the inflation of the second relay.
Step three: the air storage tank 9 charges the installation space 1020 through the air needle 6, and the upper end of the ejector rod 7 always props against the lower end of the elastic sealing body 4 in the charging process.
Step four: after the installation space 1020 is inflated, the air needle 6 is pulled out.
Step five: the sealing compound 5 is reinforced at the end of the elastic sealing body 4 facing the outside to seal the elastic sealing body 4, the gap between the elastic sealing body 4 and the inflation port 3, and to reliably hold the elastic sealing body 4 in the inflation port 3.
As shown in fig. 5 and 6, one embodiment of the relay vacuumizing and inflating method of the present invention is shown.
The relay shown in fig. 5 and 6 includes an elastic sealing body 4 according to a fifth embodiment of the present invention, and the following steps are specific:
step one: the upper end of the air needle 6 passes through the slit 42 of the elastic sealing body 4 and protrudes from the upper end of the elastic sealing body 4 to be communicated with the installation space 1020, and the upper end of the ejector rod 7 abuts against the lower end of the elastic sealing body 4, at this time, the inner side of the slit 42 is tightly attached to the air needle 6.
Step two: the vacuum pump 8 vacuumizes the installation space 1020 through the air needle 6 and enables the installation space 1020 to reach a certain vacuum value.
Step three: the air tank 9 inflates the installation space 1020 through the air needle 6 and brings the inside of the installation space 1020 to a certain air pressure value, which is > the outside atmospheric pressure.
Step four: the ejector rod 7 continuously pushes against the elastic sealing body 4, the air needle 6 is pulled out, the slit 42 of the elastic sealing body 4 automatically rebounds, the two sides of the slit are tightly attached to form a first seal, and the ejector rod 7 moves downwards and does not push against the elastic sealing body 4.
Step five: as shown in fig. 6, the fixing seal 5 is dispensed into the portion of the inflation port 3 between the lower end of the elastic seal body 4 and the lower end of the inflation port 3 to seal the slit 42 of the elastic seal body 4, seal the joint between the elastic seal body 4 and the inflation port 3, and reliably hold the elastic seal body 4 in the inflation port 3. It should be noted that, since the elastic sealing body 4 forms a reliable first seal, the sealing compound 5 will not bulge, and the volatile gas of the sealing compound 5 will not enter the installation space 1020, which affects the contact resistance of the relay.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (16)
1. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the elastic sealing body (4) is a solid cylinder, the air needle (6) pierces the elastic sealing body (4) to inflate the installation space (1020), and after the air needle (6) is pulled out, the elastic sealing body (4) rebounds to prevent gas in the installation space (1020) from escaping.
2. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the middle part of the elastic sealing body (4) is provided with a slit (42), the slit (42) is arranged along the axial direction of the elastic sealing body (4), two sides of the slit (42) are tightly attached, the air needle (6) passes through the slit (42) to inflate the installation space (1020), and after the air needle (6) is pulled out, two sides of the slit (42) rebound tightly to be closed, so that gas in the installation space (1020) is prevented from escaping.
3. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the middle part of the elastic sealing body (4) is provided with a sealing body jack (49), the sealing body jack (49) is axially arranged along the elastic sealing body (4), the inner diameter of the sealing body jack (49) is smaller than the outer diameter of the air needle (6), one end, close to the installation space (1020), of the sealing body jack (49) is provided with a valve (40), the air needle (6) penetrates through the middle part of the sealing body jack (49) to inflate the installation space (1020), and when the air pressure in the installation space (1020) is greater than the external atmospheric pressure, after the air needle (6) is pulled out, the valve (40) is automatically closed to prevent gas in the installation space (1020) from escaping.
4. A relay according to claim 3, characterized in that: the valve (40) is arranged at the upper end of the elastic sealing body (4), the valve (40) is hemispherical or conical, a gas-passing hole is formed in the central position of the valve (40), the inner diameter of the gas-passing hole is smaller than that of the sealing body jack (49), the thickness of the valve (40) is gradually thickened from the central position to the periphery, and the thickness of the central position is minimum.
5. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the middle part of the elastic sealing body (4) is provided with a sealing body jack (49), the sealing body jack (49) is arranged along the axial direction of the elastic sealing body (4), the inner diameter of the sealing body jack (49) is smaller than the outer diameter of the air needle (6), the middle part of the sealing body jack (49) is provided with a plurality of groups of valves (40), the air needle (6) penetrates through the middle part of the sealing body jack (49) to inflate the installation space (1020), and when the air pressure in the installation space (1020) is greater than the external atmospheric pressure, after the air needle (6) is pulled out, the valves (40) are automatically closed to prevent gas in the installation space (1020) from escaping.
6. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the middle part of the elastic sealing body (4) is provided with a sealing body jack (49), the sealing body jack (49) is arranged along the axial direction of the elastic sealing body (4), the inner diameter of the sealing body jack (49) is smaller than the outer diameter of the air needle (6), one end, close to the installation space (1020), of the sealing body jack (49) is provided with a thin-wall pipe (41) integrated with the elastic sealing body (4), the thin-wall pipe (41) is communicated with the sealing body jack (49), the air needle (6) penetrates through the middle part of the sealing body jack (49) to inflate the installation space (1020), and after the air needle (6) is pulled out, the thin-wall pipe (41) is automatically closed to prevent gas in the installation space (1020) from escaping.
7. A relay according to any one of claims 1-6, characterized in that: the inflation inlet (3) comprises a first hole (30) and a second hole (31) which are communicated, one end of the first hole (30) is communicated with the installation space (1020), one end of the second hole (31) is communicated with the outside, the inner diameter of the first hole (30) is smaller than the inner diameter of the second hole (31), and the elastic sealing body (4) is arranged in the second hole (31).
8. A relay comprises a housing (1) and a base (2) fixedly connected with the housing (1), wherein the housing (1) and the base (2) are matched to form a closed installation space (1020);
the method is characterized in that: an inflation inlet (3) is formed in the base (2), an elastic sealing body (4) in interference fit with the inflation inlet is arranged in the inflation inlet (3), the outer side of the elastic sealing body (4) is tightly attached to the inner side of the inflation inlet (3), an air needle (6) penetrates through the middle of the elastic sealing body (4), and the air needle (6) is tightly attached to the elastic sealing body (4) to vacuumize and inflate the installation space (1020);
the shaft interface of the elastic sealing body (4) is of a T-shaped structure and comprises a sealing body trunk (43) and a sealing body sealing cap (44) arranged at one end of the sealing body trunk (43), one side of the sealing body trunk (43) is axially provided with a sealing body jack (49), the sealing body jack (49) is communicated with an installation space (1020), and the inner diameter of the sealing body jack (49) is smaller than the outer diameter of the air needle (6); the inflation inlet (3) is a circular through hole, the outer diameter of the sealing body sealing cap (44) is larger than the inner diameter of the inflation inlet (3), and the sealing body trunk (43) is inserted into the inflation inlet (3) to be matched with the inflation inlet, so that the sealing body sealing cap (44) is positioned in the installation space (1020);
the air needle (6) passes through the sealing body jack (49) to be communicated with the installation space (1020) to inflate the installation space (1020), so that the air pressure in the installation space (1020) is greater than the external atmospheric pressure, the air needle (6) is pulled out, and the air pressure in the installation space (1020) forces the sealing body to seal the cap (44) to seal the inflation inlet (3), so that the air in the installation space (1020) is prevented from escaping.
9. A relay vacuumizing and inflating system, which is used for vacuumizing and inflating the relay according to any one of claims 1-6 or 8, and comprises a three-way switch (11), an air needle (6), a vacuum pump (8) and an air storage tank (9) which are respectively connected with the three-way switch (11).
10. The relay vacuum pumping and charging system of claim 9, wherein: the air needle (6), the vacuum pump (8) and the air storage tank (9) are respectively connected with the three-way switch (11) through an air pipe (10).
11. The relay vacuum pumping and charging system of claim 9, wherein: the ejector rod (7) is sleeved outside the air needle (6), the ejector rod (7) and the air needle (6) can slide relatively, and the ejector rod (7) is used for propping against the elastic sealing body (4) towards the direction of the installation space (1020).
12. The relay vacuum pumping and charging system of claim 9, wherein: the three-way switch (11) is a three-way electromagnetic valve.
13. A relay vacuumizing and inflating method, which is characterized by using the relay vacuumizing and inflating system as claimed in any one of claims 9-12, comprising the following steps:
step one: the air needle (6) passes through the elastic sealing body (4) to be communicated with the installation space (1020);
step two A: the vacuum pump (8) vacuumizes the installation space (1020) through the air needle (6);
step three: the air storage tank (9) is used for inflating the installation space (1020) through the air needle (6);
step four: after the installation space (1020) is inflated, the air needle (6) is pulled out.
14. The relay vacuumizing and inflating method according to claim 13, wherein: in the third step, the ejector rod (7) always abuts against the elastic sealing body (4).
15. The relay vacuumizing and inflating method according to claim 13, wherein: the method also comprises the following steps: and the sealing glue (5) is reinforced at the end of the elastic sealing body (4) facing the outside so as to seal the joint between the elastic sealing body (4) and the inflation inlet (3) at the end of the elastic sealing body (4) facing the outside and fixedly connect the elastic sealing body (4) with the base (2) of the relay.
16. The relay vacuumizing and inflating method according to claim 13, wherein: and the method also comprises the step B: the vacuum pump (8) pumps out air in an air pipe (10) between the three-way electromagnetic valve (11) and the air storage tank (9).
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| CN201810761870.9A CN108899249B (en) | 2018-07-11 | 2018-07-11 | Relay, relay vacuumizing and inflating system and relay vacuumizing and inflating method |
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| CN201810761870.9A CN108899249B (en) | 2018-07-11 | 2018-07-11 | Relay, relay vacuumizing and inflating system and relay vacuumizing and inflating method |
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| CN109994342A (en) * | 2019-04-08 | 2019-07-09 | 浙江泰华电器有限公司 | A kind of relay and its inflation method with hydrogen |
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