CN114974999A - Multi-cavity reed switch and anti-misoperation oil flow quick-acting relay - Google Patents
Multi-cavity reed switch and anti-misoperation oil flow quick-acting relay Download PDFInfo
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- CN114974999A CN114974999A CN202210479583.5A CN202210479583A CN114974999A CN 114974999 A CN114974999 A CN 114974999A CN 202210479583 A CN202210479583 A CN 202210479583A CN 114974999 A CN114974999 A CN 114974999A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
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Abstract
The invention provides a multi-cavity reed switch and an anti-misoperation oil flow velocity relay, wherein the reed switch comprises a glass tube assembly, a plurality of pairs of on-off assemblies, a magnetic transmission assembly and a protection part, the glass tube assembly comprises a plurality of glass tubes, each glass tube is provided with a sealed cavity, each cavity is independent and arranged side by side, the plurality of cavities are respectively in one-to-one correspondence with the plurality of pairs of on-off assemblies, the magnetic transmission assembly is connected with each glass tube and arranged at intervals with the on-off assemblies, the magnetic transmission assembly has magnetism when an external magnetic field is applied, each on-off assembly is influenced by the magnetism of the magnetic transmission assembly to act when the magnetic transmission assembly has the magnetism, the protection part is formed by pouring an insulating material and wraps the parts of the glass tube assembly and the on-off assemblies, which are easy to generate carbon adsorption, and the end parts of the on-off assemblies penetrate through the protection part to be connected with an external circuit. The invention can ensure that all the on-off components act simultaneously, thereby sending out a plurality of groups of signals simultaneously, effectively preventing the relay from misoperation and avoiding the formation of a carbon bridge.
Description
Technical Field
The invention relates to a multi-cavity reed switch and an anti-misoperation oil flow speed-action relay.
Background
In a transformer, an oil flow relay is generally provided to monitor whether a failure occurs inside the transformer. The oil flow speed relay is provided with a reed switch, and when the inside of the transformer breaks down, the reed switch is switched on or off, and corresponding signals are sent out in time.
In the existing oil flow relay, only one reed switch is usually arranged, but in actual use, the reed switch may send out an error signal due to pollution and the like, so that the oil flow relay is mistakenly operated, and further serious consequences are caused.
On the other hand, in the conventional reed switch, the reed switch is disposed in the glass tube, and the end of the reed switch protrudes out of the opening of the glass tube to be connected to an external circuit as a conductive lead, and the glass tube is closed by contracting the opening of the glass tube at a high temperature. The conductive leads themselves are insulated, but the insulation at the glass tube opening melts due to the high temperature, resulting in a bare section of the conductive lead. In the prior art, a heat-shrinkable sleeve is sleeved on an exposed part of a conductive lead to insulate the exposed part. However, because of the special shape of the shrinkage sealing position of the glass tube and the limitation of the process, the exposed section cannot be completely sealed by the heat-shrinkable sleeve, and a tiny exposed position still exists. The oil flow velocity of flow relay soaks in transformer oil when using, and this exposed department can constantly adsorb the carbon particle in the transformer oil, will form the carbon bridge after the time is long, as shown in figure 1, so will lead to the creepage distance of tongue tube not enough, can take place the condition that the carbon bridge punctures even, influence the normal use of tongue tube, bring considerable potential safety hazard for the transformer.
Disclosure of Invention
The invention provides a multi-cavity reed switch and an anti-misoperation oil flow speed relay, which can ensure that all on-off components act simultaneously, so that a plurality of groups of signals are sent simultaneously, the relay is effectively prevented from being operated mistakenly, and a carbon bridge can be avoided.
The invention is realized by the following technical scheme:
a multi-cavity reed switch comprises a glass tube assembly, a plurality of pairs of on-off assemblies, a magnetic transmission assembly and a protection part, wherein the glass tube assembly comprises a plurality of glass tubes, each glass tube is provided with a sealed cavity, each cavity is mutually independent and arranged side by side, the plurality of cavities are respectively in one-to-one correspondence with the plurality of pairs of on-off assemblies, the magnetic transmission assembly is connected with each glass tube and is arranged at intervals with the on-off assemblies, and the magnetic transmission assembly has magnetism when an external magnetic field is applied, when the magnetic transmission assembly has magnetism, each on-off assembly acts under the influence of the magnetism of the magnetic transmission assembly, the magnetic transmission assembly comprises a plurality of magnetic relay blocks, a magnetic relay block is embedded into the glass tube between every two adjacent chambers, the protection part is formed by pouring insulating materials, the part, prone to carbon adsorption, of the glass tube assembly and the on-off assembly is wrapped, and the end part of the on-off assembly penetrates out of the protection part to be connected with an external circuit.
Furthermore, the glass tube comprises a tube wall forming the closed cavity, two adjacent glass tubes are provided with a shared tube wall, the magnetic relay block is embedded in the shared tube wall, and two ends of the magnetic relay block do not extend out of the shared tube wall.
Further, each of the magnetic relay blocks is integrally formed with each of the glass tubes.
Further, the shape of the magnetic relay block is a cuboid or a sphere.
Further, the magnetic relay block is made of a soft magnetic material.
Furthermore, the on-off component comprises a fixed rod and a dry reed, the fixed rod and the dry reed can conduct electricity, the fixed rod and the dry reed are arranged in the cavity, the end part of the fixed rod extends out of the cavity and the protection part, the fixed rod and the dry reed are provided with exposed sections at the positions where the cavity extends out, the exposed sections are the parts where carbon adsorption easily occurs, and the dry reed has magnetism under the action of a magnetic field, is deviated to the fixed rod and is in contact with the fixed rod.
Further, the insulating material includes an epoxy resin.
The invention is also realized by the following technical scheme:
a multi-cavity reed switch comprises a glass tube assembly, a plurality of pairs of on-off assemblies, a magnetic transmission assembly and a protection part, wherein the glass tube assembly comprises a plurality of glass tubes, each glass tube is provided with a sealed cavity, each cavity is independent and arranged side by side, the plurality of cavities are in one-to-one correspondence with the plurality of pairs of on-off assemblies respectively, the magnetic transmission assembly is connected with each glass tube and is arranged at intervals with the on-off assemblies, the magnetic transmission assembly has magnetism when an external magnetic field is applied, when the magnetic transmission assembly has magnetism, each on-off assembly is influenced by the magnetism of the magnetic transmission assembly to act, the magnetic transmission assembly comprises a cuboid magnetic relay block, the magnetic relay block is connected with each glass tube respectively and extends along the arrangement direction of each cavity, the length of the magnetic relay block is not less than the width of the glass tube assembly, the protection part is formed by pouring of an insulating material, and the parts, which are easy to generate carbon adsorption, of the glass tube assembly and the on-off assemblies are wrapped, the end part of the on-off component penetrates out of the protection part to be connected with an external circuit.
Furthermore, the on-off assembly comprises a fixing rod and a dry reed, both the fixing rod and the dry reed can conduct electricity, the fixing rod and the dry reed are arranged in the cavity, the end parts of the fixing rod and the dry reed extend out of the cavity and the protective part, the fixing rod and the dry reed are provided with exposed sections at the positions of the extending out of the cavity, the exposed sections are parts prone to carbon adsorption, the dry reed has magnetism under the action of a magnetic field, is deviated to the fixing rod and is in contact with the fixing rod, the glass tube comprises tube walls forming the closed cavity, the magnetic relay blocks are arranged on one side of each tube wall, and the magnetic relay blocks and the dry reed are arranged oppositely, so that the dry reed can be influenced by the magnetic relay blocks to act.
The invention is also realized by the following technical scheme:
an anti-malfunction oil flow rate relay comprises a multi-cavity reed switch as described in any one of the above.
The invention has the following beneficial effects:
1. the oil flow quick-acting relay is provided with a plurality of groups of on-off assemblies, the plurality of groups of on-off assemblies act simultaneously to send out a plurality of groups of signals simultaneously, and the receiving end judges according to the plurality of groups of received signals to determine whether the oil flow quick-acting relay acts or not, so that the probability of misoperation of the oil flow quick-acting relay can be effectively reduced compared with the situation that whether the oil flow quick-acting relay acts or not is judged according to only one signal in the prior art; because a plurality of groups of on-off components are respectively arranged in a plurality of cavities, and the action of the on-off components is influenced by an external magnetic field, in the prior art, a magnet is generally arranged as an external magnetic field source, because the magnetic resistance of the air is influenced, the magnetic property of the magnet can be attenuated along with the increase of the distance, the magnetic influence of the on-off components far away from the magnet is weaker, and in order to ensure that the on-off components can act simultaneously, a magnetic transmission component connected with each glass tube is arranged, the magnetic transmission component has the magnetic property when being applied with the external magnetic field, therefore, after the external magnetic field source is close to the multi-cavity reed switch, the magnetic transmission component can reduce the magnetic resistance of the air, the on-off component far away from the magnet can still be influenced by the magnetic property, and therefore, the reed switch of the invention can send a plurality of signals simultaneously, the magnetic transmission component comprises a plurality of magnetic relay blocks, the magnetic relay blocks are arranged in the shared pipe wall of the two adjacent glass pipes, so that the series connection of the magnetic circuits between the glass pipes is realized, the farther on-off assembly is delayed to act for a longer time along with the increase of the distance from an external magnetic field source, but the delay time is short, so that the on-off assemblies can be considered to act simultaneously, and the magnetic relay blocks are suitable for corresponding special occasions; the protection part is made by insulating material, and its parcel lives glass tube subassembly and the easy position that takes place carbon adsorption of break-make subassembly, is about to probably produce carbon adsorption's position isolation, so can prevent that carbon adsorption from appearing in the position that the break-make subassembly is close to the glass tube subassembly, and then avoid the formation of carbon bridge to guarantee the normal use of tongue tube.
2. The magnetic transmission assembly comprises a magnetic relay block which is a cuboid, the magnetic relay block is respectively connected with the glass tubes and extends along the arrangement direction of the chambers, the magnetic relay block is a cuboid, the length of the magnetic relay block is not less than the total width of all the glass tubes, the parallel connection of magnetic circuits among the glass tubes is realized, namely when an external magnetic field source is close to the multi-chamber reed switch, all the on-off assemblies are simultaneously influenced by magnetism to act under the action of the magnetic relay block, and therefore the simultaneous action of the on-off assemblies is ensured.
3. Each magnetic relay block and each glass tube are integrally formed, the magnetic relay blocks are embedded when the glass tubes are poured, the magnetic relay blocks are firmly combined with the glass tubes, and the process is simple and easy to realize.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic representation of a multi-lumen reed tube forming a carbon bridge according to the prior art.
FIG. 2 is a schematic structural diagram of a multi-lumen reed switch according to a first embodiment of the present invention.
FIG. 3 is a schematic structural view of a multi-lumen reed switch according to a second embodiment of the present invention.
FIG. 4 is a schematic structural view of a multi-lumen reed switch according to a third embodiment of the present invention.
Fig. 4-1 is a schematic bottom view (with the protective part removed) of a multi-lumen reed switch according to a third embodiment of the present invention.
Wherein, 11, a glass tube; 12. a chamber; 13. a tube wall; 14. a common tube wall; 21. fixing the rod; 22. dry reed pieces; 3. a magnetic relay block; 4. a protective part; 5. a carbon bridge; 6. an insulating layer.
Detailed Description
The first embodiment is as follows:
as shown in fig. 2, the multi-cavity reed switch comprises a glass tube assembly, three on-off assemblies, a magnetic transmission assembly and a protection part 4, wherein the glass tube assembly comprises three glass tubes 11, each glass tube 11 is provided with a closed cavity 12, the three cavities 12 are mutually independent and arranged side by side, each cavity 12 corresponds to each pair of on-off assemblies one by one, namely, each cavity 12 is internally provided with one on-off assembly, each cavity 12 is formed by a tube wall 13, two adjacent glass tubes 11 are provided with a shared tube wall 14, the magnetic transmission assembly comprises two magnetic relay blocks 3, one magnetic relay block 3 is embedded in the shared tube wall 14, two ends of each magnetic relay block 3 do not extend out of the shared tube wall 14, so that the magnetic relay blocks 3 and the on-off assemblies are arranged at intervals, when an external magnetic field is applied to the magnetic relay blocks 3, when a transformer fails, an external magnetic source (such as a magnet) is close to the multi-cavity reed switch, each magnetic relay block 3 is sequentially magnetized according to the distance from the external magnetic field source, thus, the series transmission of the magnetic circuit is realized, and the on-off components corresponding to the respective magnetic relay blocks 3 are also operated in sequence, but the operation delay time is very short, and it can be considered that the on-off components are operated almost simultaneously. Protection part 4 is formed by the insulating material pouring, wraps up glass tube subassembly, the easy position that takes place carbon adsorption of magnetic transmission subassembly and break-make subassembly, and the break-make subassembly tip is worn out protection part 4 in order to be connected with external circuit. The specific structure of the connection of the end of the on-off assembly with the external circuit is the prior art.
Each glass tube 11 is integrally molded, and each magnetic relay block 3 is also integrally molded with each glass tube 11, so that the magnetic relay blocks 3 are firmly bonded to the glass tubes 11 by fitting the magnetic relay blocks 3 into the glass tubes 11 when the glass tubes 11 are cast, and the sealing property of the chamber 12 can be ensured. The closed chamber 12 is filled with inert gas or vacuum, and the inert gas is the prior art.
The on-off component comprises a fixing rod 21 and a dry reed 22, both the fixing rod 21 and the dry reed 22 can conduct electricity, both the fixing rod 21 and the dry reed 22 are arranged in the cavity 12, the end portions of both the fixing rod 21 and the dry reed 22 penetrate out of the same end of the glass tube 11, insulating layers 6 are arranged on both the fixing rod 21 and the dry reed 22, however, the fixing rod 21 and the dry reed 22 are provided with exposed sections which are not wrapped by the insulating layers 6 at positions where the fixing rod 21 and the dry reed 22 extend out of the cavity 12, the dry reed 22 is made of soft magnetic materials and can have magnetism under the action of an external magnetic field, after the magnetism is achieved, the upper end of the dry reed can be attracted by the fixing rod 21, so that the dry reed 21 deflects to contact with the fixing rod 21, and even if the on-off component is conducted. In order to provide the magnetic relay block 3 with a more excellent effect, the magnetic relay block 3 is provided on the upper portion of the common pipe wall 14 so as to be closer to the upper ends of the fixing rod 21 and the reed switch 22, that is, to the end where the reed pipe operates. As shown in fig. 1, in the position where the fixing rod 21 and the dry reed 22 extend out of the glass tube 11, carbon adsorption easily occurs on the exposed section, so that the protection part 4 covers the position and isolates the position from the outside, thereby preventing the occurrence of carbon adsorption. When the fixing rod 21 and the dry reed 22 are used, they are connected to an external circuit by a wire, and therefore the ends of the fixing rod 21 and the dry reed 22 need to protrude from the protection part 4.
The magnetic relay block 3 may be rectangular or spherical in shape, or may have another shape. The material for making the magnetic relay block 3 is soft magnetic material, such as soft iron. The insulating material for making the protective part 4 is epoxy resin.
The malfunction-preventing oil flow-speed relay comprises the multi-cavity reed switch and the magnet arranged at intervals with the multi-cavity reed switch, and in the existing oil flow-speed relay, the reed switch can be replaced by the multi-cavity reed switch.
The working principle of the invention is as follows:
when a fault occurs in the transformer, the magnet is pushed to be close to the multi-cavity reed pipe by oil flow, each magnetic relay block 3 is sequentially magnetized according to the distance from the magnet, and therefore series transmission of a magnetic circuit of the magnet is achieved, the on-off assemblies corresponding to the magnetic relay blocks 3 respectively act sequentially, but the action delay time is short and can be considered to act simultaneously, the situation that the signals sent by the multi-cavity reed pipe can be judged to be credible only by sequentially sending three signals, or the situation that the three signals are sent simultaneously can be considered to be applicable, and for the situation that the three signals are sent simultaneously, when the three signals are processed, if the signals of two or three on-off assemblies are the same, the signals sent by the multi-cavity reed pipe at the time are judged to be credible, otherwise, the signals sent by the multi-cavity reed pipe at the time are judged to be incredible.
When the malfunction-proof oil flow velocity relay is used, the malfunction-proof oil flow velocity relay is soaked in transformer oil, one end of the fixing rod 21 and one end of the dry reed 22, which extend out of the glass tube 11, are respectively connected with the positive electrode and the negative electrode of a direct-current power supply through leads, and the exposed section of the fixing rod 21 or the dry reed 22, which is connected with the negative electrode of the direct-current power supply, can form a carbon bridge 55 due to carbon particle adsorption, as shown in fig. 1, in the embodiment, a part which is possibly adsorbed with carbon particles is wrapped by the protection part 4, so that the part is not contacted with the transformer oil any more, and the formation of the carbon bridge 55 is avoided.
Example two:
as shown in fig. 3, the difference between the present embodiment and the first embodiment is: the ends of the fixing rod 21 and the dry reed 22 are respectively passed out from both ends of the glass tube 11. In this case, the magnetic relay block 3 is disposed in the middle of the glass tube 11 so as to be closer to the end of the dry reed 22.
Other parts are the same as those in the first embodiment, and are not described herein again.
Example three:
as shown in fig. 4 and 4-1, the present embodiment is different from the first embodiment in that:
in this embodiment, the magnetic relay block 3 is a rectangular parallelepiped, the magnetic relay block 3 is disposed on one side of each tube wall 13, and the magnetic relay block 3 and the dry reed 22 are arranged opposite to each other, so that the dry reed 22 can be influenced by the magnetic relay block 3 to act, in this embodiment, the fixing rod 21 and the dry reed 22 are arranged up and down, and then the magnetic relay block 3 is disposed on the upper side of each tube wall 13, that is, close to the fixing rod 21 of the on-off assembly and far from the dry reed 22 of the on-off assembly, when the magnetic relay block 3 has magnetism, the dry reed 22 acts relative to the fixing rod 21, and the length of the magnetic relay block 3 is not less than the width of the glass tube assembly, that is, not less than the total width of the three glass tubes 11. In this embodiment, the glass tube 11 may be attached to the magnetic relay block 3 by an attaching method.
Other parts are the same as the embodiment and are not described again.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (10)
1. A multicavity tongue tube which characterized in that: comprises a glass tube assembly, a plurality of pairs of on-off assemblies, a magnetic transmission assembly and a protection part, wherein the glass tube assembly comprises a plurality of glass tubes, each glass tube is provided with a sealed cavity, the cavities are mutually independent and are arranged side by side, the cavities are respectively in one-to-one correspondence with the on-off assemblies, the cavities are vacuum or filled with inert gas, the magnetic transmission assembly is connected with the glass tubes and is arranged at intervals with the on-off assemblies, and the magnetic transmission assembly has magnetism when an external magnetic field is applied, when the magnetic transmission assembly has magnetism, each on-off assembly acts under the influence of the magnetism of the magnetic transmission assembly, the magnetic transmission assembly comprises a plurality of magnetic relay blocks, a magnetic relay block is embedded into the glass tube between every two adjacent chambers, the protection part is formed by pouring insulating materials, the part, prone to carbon adsorption, of the glass tube assembly and the on-off assembly is wrapped, and the end part of the on-off assembly penetrates out of the protection part to be connected with an external circuit.
2. The multiple lumen reed switch of claim 1, wherein: the glass tube comprises a tube wall forming the closed cavity, two adjacent glass tubes are provided with a shared tube wall, the magnetic relay block is embedded in the shared tube wall, and two ends of the magnetic relay block do not extend out of the shared tube wall.
3. The multiple lumen reed switch of claim 1, wherein: each of the magnetic relay blocks is integrally formed with each of the glass tubes.
4. A multi-lumen reed switch according to claim 1, 2 or 3, wherein: the magnetic relay block is in a cuboid or a sphere shape.
5. A multi-lumen reed switch according to claim 1, 2 or 3, wherein: the magnetic relay block is made of a soft magnetic material.
6. A multi-lumen reed switch according to claim 1, 2 or 3, wherein: the on-off component comprises a fixed rod and a dry reed, the fixed rod and the dry reed can conduct electricity, the fixed rod and the dry reed are arranged in the cavity, the end part of the fixed rod and the end part of the dry reed extend out of the cavity and the protection part, the fixed rod and the dry reed are provided with exposed sections at the positions of the fixed rod and the dry reed, the exposed sections are the parts which are easy to generate carbon adsorption, and the dry reed has magnetism under the action of a magnetic field, is deviated to the fixed rod and is in contact with the fixed rod.
7. A multi-lumen reed switch according to claim 1, 2 or 3, wherein: the insulating material includes an epoxy resin.
8. A multicavity tongue tube which characterized in that: comprises a glass tube assembly, a plurality of pairs of on-off assemblies, a magnetic transmission assembly and a protection part, wherein the glass tube assembly comprises a plurality of glass tubes, each glass tube is provided with a sealed chamber, the chambers are mutually independent and are arranged side by side, the chambers are respectively in one-to-one correspondence with the on-off assemblies, the magnetic transmission assembly is connected with the glass tubes and is arranged at intervals with the on-off assemblies, and the magnetic transmission assembly has magnetism when an external magnetic field is applied, when the magnetic transmission component has magnetism, each on-off component is influenced by the magnetism of the magnetic transmission component to act, the magnetic transmission component comprises a cuboid magnetic relay block which is respectively connected with each glass tube, and extend along each cavity array direction, the length of the magnetic relay block is not less than the width of the glass tube assembly, the protection part is formed by pouring an insulating material, the glass tube assembly and the part of the on-off assembly, which is easy to generate carbon adsorption, are wrapped, and the end part of the on-off assembly penetrates out of the protection part to be connected with an external circuit.
9. A multi-lumen reed switch according to claim 8, wherein: the on-off assembly comprises a fixing rod and a dry reed, both the fixing rod and the dry reed can conduct electricity, the fixing rod and the dry reed are arranged in the cavity, the end portions of the fixing rod and the dry reed extend out of the cavity and the protection portion, the fixing rod and the dry reed are provided with exposed sections at the positions of the extending out of the cavity, the exposed sections are parts prone to carbon adsorption, the dry reed has magnetism under the action of a magnetic field, is deviated to the fixing rod and is in contact with the fixing rod, the glass tube comprises tube walls forming the closed cavity, magnetic relay blocks are arranged on one side of each tube wall, and the magnetic relay blocks and the dry reed are arranged oppositely, so that the dry reed can be influenced by the magnetic relay blocks to act.
10. The utility model provides an anti-maloperation oil flow velocity relay which characterized in that: comprising a multi-lumen reed switch according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479583.5A CN114974999A (en) | 2022-05-05 | 2022-05-05 | Multi-cavity reed switch and anti-misoperation oil flow quick-acting relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479583.5A CN114974999A (en) | 2022-05-05 | 2022-05-05 | Multi-cavity reed switch and anti-misoperation oil flow quick-acting relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114974999A true CN114974999A (en) | 2022-08-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210479583.5A Pending CN114974999A (en) | 2022-05-05 | 2022-05-05 | Multi-cavity reed switch and anti-misoperation oil flow quick-acting relay |
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| Country | Link |
|---|---|
| CN (1) | CN114974999A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2902448A1 (en) * | 1979-01-23 | 1980-07-24 | Standard Elektrik Lorenz Ag | Series connected magnetically operated reed relay switches - use opposite polarity switching to avoid false operation by stray magnetic field |
| US5969244A (en) * | 1998-04-13 | 1999-10-19 | The United States Of America As Represented By The Secretary Of The Navy | Switch assembly for withstanding shock and vibration |
| US6480081B1 (en) * | 1997-01-30 | 2002-11-12 | Oki Electric Industry Co., Ltd. | Shock sensor |
| US20080074101A1 (en) * | 2004-09-06 | 2008-03-27 | Daniel Dobler | Flat Displacement or Position Sensor |
| CN217544471U (en) * | 2022-05-05 | 2022-10-04 | 国网福建省电力有限公司泉州供电公司 | Multi-cavity reed pipe and misoperation-preventing oil flow quick-acting relay |
-
2022
- 2022-05-05 CN CN202210479583.5A patent/CN114974999A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2902448A1 (en) * | 1979-01-23 | 1980-07-24 | Standard Elektrik Lorenz Ag | Series connected magnetically operated reed relay switches - use opposite polarity switching to avoid false operation by stray magnetic field |
| US6480081B1 (en) * | 1997-01-30 | 2002-11-12 | Oki Electric Industry Co., Ltd. | Shock sensor |
| US5969244A (en) * | 1998-04-13 | 1999-10-19 | The United States Of America As Represented By The Secretary Of The Navy | Switch assembly for withstanding shock and vibration |
| US20080074101A1 (en) * | 2004-09-06 | 2008-03-27 | Daniel Dobler | Flat Displacement or Position Sensor |
| CN217544471U (en) * | 2022-05-05 | 2022-10-04 | 国网福建省电力有限公司泉州供电公司 | Multi-cavity reed pipe and misoperation-preventing oil flow quick-acting relay |
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