Nitrogen-sealed microswitch
By isolating the microswitch module from the external environment through a nitrogen-sealed structure and utilizing a combination of Kovar alloy and glass materials, the corrosion and oxidation problem of the microswitch in high-temperature salt spray environment is solved, thereby improving the reliability and lifespan of the switch.
Patent Information
- Application Number
- CN202423276123.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing microswitches are prone to corrosion and oxidation in high-temperature salt spray environments, leading to false alarms, increased hysteresis, and shortened lifespan, and lack effective protection devices.
It adopts a nitrogen-sealed structure, which combines Kovar alloy and glass materials. The micro switch module is isolated from the external environment by nitrogen sealing to form a sealed structure. Kovar alloy wire core and glass seal are used to avoid corrosion and oxidation.
It effectively prevents microswitches from corroding in high-temperature salt spray environments, improves the switch's oxidation resistance, reduces the risk of false alarms, extends service life, and reduces replacement costs.
Smart Images
Figure CN223884302U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of micro switch technology, specifically relating to a nitrogen-sealed micro switch. Background Technology
[0002] In high-temperature salt spray environments, level switches are required for long-term, effective level measurement of the medium. However, the medium being measured typically exhibits high temperature and pressure, and the installation environment is often characterized by high temperature and salt spray. Components of the switch module react with the environmental medium, leading to false alarms, increased hysteresis, and failure to clear alarms. This makes the level switch prone to damage, with a short replacement window and high replacement costs. Therefore, there is an urgent need to design a safe and reliable encapsulation method to address the problem of aging under high-temperature salt spray and reduce the risk of false alarms.
[0003] Currently, when switches are subjected to high-temperature corrosion for extended periods, the lead contacts and components of the switch module are at risk of corrosion and oxidation failure, resulting in a reduction in the overall lifespan of the switch.
[0004] Currently, there is no overall protection device for this type of micro switch. It is basically exposed to high temperature and salt spray environment. After long-term operation, the micro switch module and contacts will be corroded and oxidized, affecting the accuracy of switch measurement and causing misjudgment in the factory. Utility Model Content
[0005] The purpose of this invention is to provide a nitrogen-sealed micro switch that can solve the problems of existing switches being easily damaged and unstable in use.
[0006] The technical solution of this utility model is as follows: a nitrogen-sealed micro switch includes a nitrogen-sealed switch tank, a fixed bracket is installed inside the nitrogen-sealed switch tank, a micro switch mechanical structure is fixed on the fixed bracket, a micro switch module is installed on the micro switch mechanical structure, the micro switch mechanical structure and the micro switch swing module are connected by a rotating shaft, a positioning tube is installed in the middle of the nitrogen-sealed switch tank, and a nitrogen-sealed switch cover plate is connected to the upper part of the nitrogen-sealed switch tank.
[0007] The nitrogen-sealed switch tank has a barrel-shaped hollow structure.
[0008] The nitrogen-sealed switch cover plate is provided with a wire core.
[0009] The nitrogen-sealed switch cover plate is provided with a glass seal between itself and the wire core.
[0010] The nitrogen-sealed switch cover and the wire core are made of Kovar alloy.
[0011] The nitrogen sealing switch tank has nitrogen input holes and discharge holes at upper and lower ends, nitrogen gas is filled in the tank by an oxygen lance, and the micro switch is in a nitrogen sealing state.
[0012] The micro switch module is installed in the micro switch mechanical structure, the nitrogen sealing switch cover plate, the wire core and the glass form an upper sealing cover body, and the micro switch module is connected with the wire core and used for connecting external and internal electric signals of the micro switch.
[0013] The micro switch swing module comprises a magnetic steel and a magnetic steel fixing structure, when the magnetic block in the positioning pipe body moves up and down, the micro switch swing module can rotate around the rotating shaft, so that the micro switch module is triggered, a switch signal is formed, and the switch signal is transmitted through the wire core.
[0014] The micro switch module is sealed by the metal and glass combination, the switch module is completely isolated from the external environment, the glass and the Kovar alloy have the following advantages: 1. the glass material has high melting point and thermal stability; 2. the thermal expansion coefficients of the Kovar alloy and the glass are close, so that the rupture failure in a high-temperature environment can be avoided; 3. the glass is an excellent electric insulation material and can provide good electric isolation effect; 4. the glass has excellent airtightness and can effectively prevent the corrosion of oxygen, moisture and halogen in the environment. The packaging form can effectively increase the corrosion resistance of the micro switch in a high-temperature salt spray environment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 The nitrogen sealing micro switch is provided by the utility model and has the advantages that the micro switch module is sealed by the metal and glass combination, the switch module is completely isolated from the external environment, the glass and the Kovar alloy have the following advantages: 1. the glass material has high melting point and thermal stability; 2. the thermal expansion coefficients of the Kovar alloy and the glass are close, so that the rupture failure in a high-temperature environment can be avoided; 3. the glass is an excellent electric insulation material and can provide good electric isolation effect; 4. the glass has excellent airtightness and can effectively prevent the corrosion of oxygen, moisture and halogen in the environment. The packaging form can effectively increase the corrosion resistance of the micro switch in a high-temperature salt spray environment.
[0016] Figure 2 The nitrogen sealing micro switch is provided by the utility model and has the advantages that the micro switch module is sealed by the metal and glass combination, the switch module is completely isolated from the external environment, the glass and the Kovar alloy have the following advantages: 1. the glass material has high melting point and thermal stability; 2. the thermal expansion coefficients of the Kovar alloy and the glass are close, so that the rupture failure in a high-temperature environment can be avoided; 3. the glass is an excellent electric insulation material and can provide good electric isolation effect; 4. the glass has excellent airtightness and can effectively prevent the corrosion of oxygen, moisture and halogen in the environment. The packaging form can effectively increase the corrosion resistance of the micro switch in a high-temperature salt spray environment.
[0017] Figure 3 The nitrogen sealing switch cover plate is shown in the schematic view.
[0018] Figure 4 The nitrogen sealing switch tank is shown in the sectional view.
[0019] Figure 5 The nitrogen sealing switch cover plate is shown in the plan view.
[0020] Figure 6 The micro switch mechanical structure is shown in the schematic view.
[0021] Figure 7 The micro switch swing module is shown in the schematic view.
[0022] In the figure: 1 wire core, 2 nitrogen sealing switch cover plate, 3 glass seal, 4 micro switch module, 5 micro switch mechanical structure, 6 nitrogen sealing switch tank body, 7 positioning pipe body, 8 micro switch swing module, 9 fixed support, 10, 11. DETAILED DESCRIPTION
[0023] The utility model will be made further detailed explanation in combination with the drawings and specific embodiment.
[0024] A nitrogen sealing micro switch provided by the utility model, including micro switch module 4 is installed in micro switch mechanical structure 5, nitrogen sealing switch cover plate 2 and wire core 1, glass seal 3 form upper sealing cover body, for connecting the inside and outside electric signal of micro switch, simultaneously with nitrogen sealing switch tank body 6 forms sealing structure, nitrogen gas input hole and discharge hole are opened in the upper and lower ends of tank body, can make tank body inside fill with nitrogen gas by oxygen lance, and then make micro switch be in nitrogen gas sealing state.
[0025] Among them, micro switch swing module 8 and micro switch mechanical structure 5 are rotation shaft connections, and the swing module is composed of magnetic steel and magnetic steel fixing structure, when the magnetic block in the positioning pipe body 7 moves up and down, the micro switch swing module can rotate around the rotation shaft, so as to trigger the micro switch module 4, form switch signal, and transmit out through wire via wire core 1.
[0026] A nitrogen sealing micro switch, including wire core 1, nitrogen sealing switch cover plate 2, glass seal 3, micro switch module 4, micro switch mechanical structure 5, nitrogen sealing switch tank body 6, positioning pipe body 7, micro switch swing module 8. The nitrogen sealing switch tank body 6 is a hollow structure, and the micro switch assembly is installed inside the nitrogen sealing switch tank body 6 and fixed by the fixed support 9. Among them, the micro switch module 4 is an existing finished product.
[0027] As shown in Figure 7 The micro switch swing module 8 includes magnetic steel 10 and magnetic steel fixing structure 11, and the micro switch swing module 8 is a frame structure as a whole, has a plate-shaped part, two flaps are connected to the plate-shaped part, a fixed plate is connected to the flaps, a rotating shaft is installed on the fixed plate, the lower end of the fixed plate is connected to a magnetic steel fixing structure 11, and the magnetic steel 10 is installed on the magnetic steel fixing structure 11.
[0028] As shown in Figure 5 The nitrogen sealing switch cover plate 2 has three holes on the upper surface, and the wire core passes through the three holes, and the material of the wire core is Kovar alloy.
[0029] The positioning pipe body 7 is welded to the nitrogen sealing switch tank body at both ends to form a sealed pipe body (inert gas wrapping) for protecting the entire micro switch module.
[0030] The nitrogen sealing switch cover plate 2 is made of Kovar alloy, fixed and insulated between the Kovar alloy wire core 1 by glass.
[0031] The micro switch mechanical structure is placed in the cavity of the nitrogen sealing tank body, and nitrogen sealing treatment is performed.
[0032] After the nitrogen sealing design improvement, the micro switch is isolated from the external salt spray environment, and the key component micro switch module is protected by nitrogen, reducing the risk of corrosion and aging of the components and prolonging the service life of the whole machine. The nitrogen sealing structure is not complex in manufacturing process, and the manufacturing cost is relatively low.
Claims
1. A nitrogen sealed microswitch characterized by: The nitrogen sealing switch tank body is provided with a fixed support, a micro switch mechanical structure fixed on the fixed support, a micro switch module installed on the micro switch mechanical structure, and a positioning pipe body installed in the middle of the nitrogen sealing switch tank body.
2. A nitrogen sealed microswitch as claimed in claim 1, wherein: The nitrogen sealing switch tank body is a barrel-shaped cavity structure.
3. A nitrogen sealed microswitch as claimed in claim 1, wherein: The nitrogen sealing switch cover plate is provided with a wire core.
4. A nitrogen sealed microswitch as claimed in claim 3, wherein: The nitrogen sealing switch cover plate and the wire core are provided with glass sealing.
5. A nitrogen sealed microswitch as claimed in claim 3, wherein: The nitrogen sealing switch cover plate and the wire core are made of Kovar alloy.
6. A nitrogen sealed microswitch as claimed in claim 1, wherein: The nitrogen sealing switch tank body is provided with a nitrogen input hole and a discharge hole at the upper and lower ends, and the tank body is filled with nitrogen through an oxygen lance, so that the micro switch is in a nitrogen sealing state.
7. A nitrogen sealed microswitch as claimed in claim 1, wherein: The micro switch module is installed on the micro switch mechanical structure, and the nitrogen sealing switch cover plate, the wire core and the glass form an upper sealing cover body.
8. A nitrogen sealed microswitch as claimed in claim 1, wherein: The micro switch module is connected with the wire core to connect the internal and external electrical signals of the micro switch. The micro switch swing module includes a magnetic steel and a magnetic steel fixing structure, and when the magnetic block in the positioning pipe body moves up and down, the micro switch swing module can rotate around the rotating shaft to trigger the micro switch module, form a switch signal, and transmit the signal through the wire through the wire core.