Mercury-free wet reed pipe as well as production process and use method thereof

Abstract

The invention discloses a mercury-free wet reed pipe which comprises a sealing pipe, a first reed and a second reed, one end of the first reed is located in the sealing pipe, and the other end of the first reed is located outside the sealing pipe; one end of the second reed is positioned in the sealing pipe, and the other end is positioned outside the sealing pipe; a first contact is arranged at one end, close to the second reed, of the first reed in the sealing pipe; a second contact is arranged at one end, close to the first reed, of the second reed in the sealing pipe; and a fluorination liquid is injected into the sealing pipe. Fluorinated liquid is injected into the wet reed pipe, the fluorinated liquid can prevent oxidation, clean carbides and prevent arc discharge, meanwhile, the contact can be cooled, and meanwhile the problem of contact adhesion caused by parasitic inductance and capacitance is solved. These advantages just complement the insufficiency of the reed switch. Therefore, the service life of the wet reed pipe is more than 5-10 times that of the dry reed pipe.

Description

Technical Field

[0001] This invention relates to reed tubes, and more particularly to a mercury-free wet reed tube. Background Technology

[0002] A reed switch is a special type of magnetically sensitive switch, also known as a reed switch. The advantages of a reed switch (magnetic reed switch) are its small size, light weight, and ease of installation. The switch contacts of a reed switch are sealed in an inert gas, preventing contact with the external environment. This greatly reduces contact oxidation and carbonization caused by contact arcing during switching. It also prevents corrosion of the contacts by external organic vapors and dust, extending its service life. The thin and short reed allows for a fast response, increasing the switching speed of the contacts by 5 to 10 times compared to ordinary electromagnetic relays. The disadvantages are: the small contact size and reed size limit its ability to handle high current switching; high current flow through the contacts can cause overheating, leading to loss of reed elasticity; (if the switching power or capacity is small) the contacts are prone to chattering; the contact impedance is high, resulting in low surge protection. In practical circuit applications, when parasitic capacitance and inductance are too large, a momentary high voltage and high current will occur when the contacts open or close. This (transient) high voltage or high current may damage the reed switch or significantly reduce its lifespan.

[0003] A reed switch, also known as a tilt switch, is a type of circuit switch that uses a small container connected to electrodes to store a drop of mercury. This container is usually vacuum-sealed or filled with an inert gas. While reed switches do not have these issues, the mercury inside them (mercury tubes) can pollute the environment, leading to their eventual obsolescence from the market. Summary of the Invention

[0004] The purpose of this invention is to provide a mercury-free reed switch, in which a fluorinated liquid is injected. The fluorinated liquid can prevent oxidation, clean carbides, and prevent arcing, while also cooling the contacts and solving the problem of contact adhesion caused by parasitic inductance and capacitance.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A mercury-free wet reed switch includes a sealing tube, a first reed, and a second reed. One end of the first reed is located inside the sealing tube, and the other end is located outside the sealing tube. One end of the second reed is located inside the sealing tube, and the other end is located outside the sealing tube. The end of the first reed located inside the sealing tube near the second reed has a first contact point. The end of the second reed located inside the sealing tube near the first reed has a second contact point. The sealing tube is filled with fluorinated liquid.

[0006] In the aforementioned mercury-free wet reed switch, the sealing tube has a liquid injection port, and the liquid injection port is sealed.

[0007] In the aforementioned mercury-free wet reed switch, the injection port is sealed with epoxy resin.

[0008] In the aforementioned mercury-free wet reed switch, the sealing tube includes a tube body with openings at both ends, and the openings at both ends of the tube body are sealed by rubber plugs. The first reed and the second reed are installed on the rubber plugs.

[0009] The above-described manufacturing process for a mercury-free reed switch includes the following steps: making a hole in the reed switch, injecting fluorinated liquid into the reed switch through the hole, and sealing the hole with epoxy resin after the reed switch is filled with fluorinated liquid.

[0010] The above-described manufacturing process for a mercury-free reed switch includes the following: the initial state of the sealing tube is that both ends have openings. First, the first reed is fixed to one end of the sealing tube and sealed by a sintering process. Then, the sealing tube is filled with fluorinated liquid. Finally, the second reed is fixed to the other end of the sealing tube and sealed by a sintering process.

[0011] The above-described manufacturing process for a mercury-free wet reed switch includes the following steps: fixing the first and second reeds to a rubber plug, sealing one opening of the tube body through the rubber plug, filling the tube body with fluorinated liquid, and then sealing the other opening of the tube body with another rubber plug.

[0012] The above-described method for using a mercury-free reed switch includes the following steps: connecting the reed switch, battery, and indicator light in series; when a magnet approaches the reed switch, the first and second contacts engage; connecting the reed switch, battery, and indicator light in series to form a closed circuit; and energizing and illuminating the indicator light.

[0013] The above-described method for using a mercury-free reed switch includes the following steps: connecting the reed switch, battery, and indicator light in series; placing an electromagnetic coil on the reed switch; and connecting the electromagnetic coil to a power source. When the power source is in operation, the first and second contacts close, connecting the reed switch, battery, and indicator light in series to form a closed circuit, thus energizing and illuminating the indicator light.

[0014] Compared with existing technologies, the reed switch of this invention is injected with a fluorinated liquid. This fluorinated liquid can prevent oxidation, clean carbides, and prevent arcing, while also cooling the contacts and solving the problem of contact adhesion caused by parasitic inductance and capacitance. These advantages perfectly compensate for the shortcomings of dry reed switches. Therefore, the lifespan of the reed switch of this invention is 5-10 times longer than that of dry reed switches. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of another embodiment of the present invention; Figure 3 This is a schematic diagram of another embodiment of the present invention; Figure 4 a is a schematic diagram of the initial state of a production process according to the present invention; Figure 4 b is a schematic diagram of a drilling method in the production process of the present invention; Figure 4 c is a schematic diagram of a liquid injection method in the production process of the present invention; Figure 4 d is a schematic diagram of a sealing method in the production process of this invention; Figure 5 a is a schematic diagram of another sintering process of the present invention; Figure 5 b is a schematic diagram of another liquid injection method in the production process of the present invention; Figure 5 c is a schematic diagram of another sintering method in the production process of this invention; Figure 5 d is a schematic diagram of the finished product structure produced by another manufacturing process of the present invention; Figure 6 a is a schematic diagram of the initial state of another production process according to the present invention; Figure 6 b is a schematic diagram of another production process for installing the rubber plug according to the present invention; Figure 6 c is a schematic diagram of another production process liquid injection method of the present invention; Figure 6 d is a schematic diagram of the finished product structure according to another production process of the present invention; Figure 7 This is a schematic diagram illustrating one usage method of the present invention; Figure 8 This is a schematic diagram illustrating another usage of the present invention.

[0016] Reference numerals: 1-First reed, 2-Second reed, 3-First contact, 4-Second contact, 5-Sealing tube, 6-Injection port, 7-Rubber plug, 8-Tube body.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0018] The working principle of wet reed switches and dry reed switches is the same: when a permanent magnet or electromagnetic field is applied to the glass tube, the two reeds close, making points A and B connected, and the current and voltage at point A flow to point B. When the applied permanent magnet or electromagnetic field is removed, the two reeds disconnect, creating an open circuit between points A and B, and the current and voltage at point A cannot reach point B. The overall structure diagram of the unmodified wet reed switch is shown. There are no major differences between the two; the main difference is that the inert gas inside the original glass tube is replaced with a fluorinated liquid, which transforms the original dry reed switch into a wet reed switch.

[0019] Inert gas is filled inside reed switches to prevent arcing during contact or disconnection. Arcing can cause contact oxidation and carbonization, reducing the reed's lifespan. Therefore, injecting inert gas is necessary to ensure the reed switch's lifespan. However, contact sticking and carbonization have still been observed during reed switch use. These issues occur when the reed switch is connected to capacitive or inductive loads; transient high voltage or high current passing through the contacts causes high temperatures, leading to contact sticking and carbonization. This shows that while inert gas can prevent arcing, it cannot eliminate the temperature and carbonization generated by high voltage and high current. Research has shown that replacing the inert gas inside the reed switch with a fluorinated liquid can prevent contact oxidation and carbonization, prevent arcing, clean contact carbon deposits, and cool the contacts. This can increase the reed switch's lifespan by 5-10 times or more. The structure of a wet reed switch is similar to that of a dry reed switch, the difference being that the inert gas inside the glass tube is replaced with a fluorinated liquid. Fluorinated liquid is a special chemical that combines contact cleaning and liquid cooling functions. It has good insulation, chemical inertness, and non-flammability. It has no flash point and is non-flammable, eliminating arcing of the reed during switching. Its thermal conductivity reaches 0.06-0.08 W / m·K, effectively eliminating reed contact temperature. It has a neutral pH and does not corrode metals, ensuring good compatibility with reed switch assemblies (the fluorinated liquid protects the reed). As can be seen, the most crucial element is the added fluorinated liquid. Fluorinated liquid is an ideal dielectric coolant, commonly used in immersion liquid cooling media in data centers. It possesses excellent insulation and outstanding chemical inertness, thus having all the advantages of inert gases, and also possessing cleaning and cooling functions that inert gases lack. Therefore, adding fluorinated liquid can compensate for the shortcomings of the original dry reed switch. This is also the focus of this invention. This invention has been verified over a long period of time and is indeed effective and feasible.

[0020] Embodiment 1 of the present invention: A mercury-free wet reed switch includes a sealing tube 5, a first reed 1 and a second reed 2. One end of the first reed 1 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. One end of the second reed 2 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. The end of the first reed 1 located inside the sealing tube 5 near the second reed 2 has a first contact 3. The end of the second reed 2 located inside the sealing tube 5 near the first reed 1 has a second contact 4. The sealing tube 5 is filled with fluorinated liquid.

[0021] Example 2: A mercury-free wet reed switch includes a sealing tube 5, a first reed 1, and a second reed 2. One end of the first reed 1 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. One end of the second reed 2 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. The end of the first reed 1 located inside the sealing tube 5 near the second reed 2 has a first contact 3. The end of the second reed 2 located inside the sealing tube 5 near the first reed 1 has a second contact 4. The sealing tube 5 is filled with fluorinated liquid. The sealing tube 5 has an injection port 6, which is sealed. The injection port 6 is sealed with epoxy resin.

[0022] Example 3: A mercury-free wet reed switch includes a sealing tube 5, a first reed 1, and a second reed 2. One end of the first reed 1 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. One end of the second reed 2 is located inside the sealing tube 5, and the other end is located outside the sealing tube 5. The end of the first reed 1 located inside the sealing tube 5 near the second reed 2 has a first contact point 3. The end of the second reed 2 located inside the sealing tube 5 near the first reed 1 has a second contact point 4. The sealing tube 5 is filled with fluorinated liquid. The sealing tube 5 includes a tube body 8 with openings at both ends. The openings at both ends of the tube body 8 are sealed by rubber plugs 7. The first reed 1 and the second reed 2 are mounted on the rubber plugs 7.

[0023] like Figure 4 a- Figure 4 As shown in d, the production process of a mercury-free wet reed switch described in Example 1 includes the following: making a hole in the reed switch, injecting fluorinated liquid into the reed switch through the hole, and sealing the hole with epoxy resin after the reed switch is filled with fluorinated liquid.

[0024] Specifically, it involves adding fluorinated liquid to the pre-sealed reed switch. Figure 4 'a' is a sealed reed switch containing inert gas. First, use a laser beam or a diamond drill bit to make a small hole at a suitable position on the reed switch to release the original inert gas. Figure 4 (b) After releasing the inert gas, clean the surrounding residue, then remove the fluorinated liquid and inject it into the glass tube through the opening ( Figure 4 (See diagram c). After the glass tube is filled with fluorinated liquid, the opening is sealed with epoxy resin to prevent leakage of the injected fluorinated liquid. At this point, the original dry reed switch is improved into the wet reed switch of this invention. A successful improvement is indicated by the reed engaging normally when electricity is applied and no leakage of fluorinated liquid. Figure 4 c shows).

[0025] like Figure 5 a- Figure 5As shown in d, the production process of a mercury-free wet reed switch described in Example 2 includes the following: the initial state of the sealing tube 5 is that both ends have openings. First, the first reed 1 is fixed to one end of the sealing tube 5 and sealed by a sintering process. Then, the sealing tube 5 is filled with fluorinated liquid. Finally, the second reed 2 is fixed to the other end of the sealing tube 5 and sealed by a sintering process.

[0026] Figure 5 a) To fix the first spring, the spring is placed in a glass tube and fixed to one end of the glass tube by sintering. After fixing the spring, the sealing between the spring and the glass must be checked to ensure it is in good condition. If the sealing is good, proceed to the next step of gas injection. The improvement of this invention lies in this step. Originally, inert gas was added in this step, but now fluorinated liquid is added instead, using fluorinated liquid to replace the original inert gas. Figure 5 (b) When the fluorinated liquid fills the glass tube, take the second reed and place it into the glass tube. Then, use a sintering process to fix the second reed to the other end. Figure 5 (See diagram c). After fixing the reed, check whether the seal between the reed and the sintered glass is good. If the seal is good, then the improvement is successful, and the original dry reed becomes the wet reed tube of this invention. Figure 5 (d). If the reed engages normally when powered on and there is no leakage of fluorinated liquid, the improvement is successful and the product can be used.

[0027] like Figure 6 a- Figure 6 As shown in d, the production process of a mercury-free wet reed switch described in Example 3 includes the following: fixing the first reed 1 and the second reed 2 onto the rubber plug 7, sealing one opening of the tube body 8 through the rubber plug 7, filling the tube body 8 with fluorinated liquid, and then sealing the other opening of the tube body 8 with another rubber plug 7.

[0028] The components used to make a wet reed switch include a glass tube (not limited to glass, metal tubes and other tubular materials can also be used) and a pre-formed polymer rubber plug (the reed and the polymer rubber plug are die-cast). One wet reed switch requires one glass tube and two pre-formed polymer rubber plugs. (According to...) Figure 6 b) Take one glass tube and one pre-processed polymer rubber plug, and press the polymer rubber plug into... Figure 2 Insert one end of the glass tube, confirming it is securely inserted. Then, apply epoxy resin to the joint between the polymer rubber plug and the glass tube to seal and prevent leakage. Once confirmed to be leak-free, proceed as follows: Figure 6c) Stand the processed glass tube upright, then inject fluorinated liquid into the glass tube until it is completely filled, but do not overflow. Take another processed reed and insert it into the other end of the glass tube. After confirming that it is properly inserted, apply epoxy resin to the joint between the reed and the glass tube to seal it and prevent leakage. Once it is confirmed that there is no leakage, a complete wet reed switch assembly is finished. Figure 6 d) The assembled wet reed switch is ready for use. When electricity is applied and the reed engages normally with no leakage of fluorinated liquid, the assembly is successful and the switch is ready for use.

[0029] Although reed switches are also a substitute for traditional wet reed switches (mercury reed switches), their service life and load-bearing capacity are far inferior. The wet reed switch of this invention, however, is filled with a fluorinated liquid. This fluorinated liquid can prevent oxidation, clean carbides, and prevent arcing, while also cooling the contacts and solving the problem of contact adhesion caused by parasitic inductance and capacitance. These advantages perfectly compensate for the shortcomings of reed switches. Therefore, the wet reed switch of this invention has a lifespan 5-10 times longer than that of a reed switch.

[0030] like Figure 7 As shown in Examples 1 to 3, the first method of using a mercury-free reed switch includes the following: connecting the reed switch, battery, and indicator light in series; when a magnet approaches the reed switch, the first contact 3 and the second contact 4 are attracted together; connecting the reed switch, battery, and indicator light in series to form a closed circuit; and energizing and illuminating the indicator light.

[0031] like Figure 8 As shown, the second method of using a mercury-free reed switch described in Examples 1 to 3 includes the following: connecting the reed switch, battery, and indicator light in series; placing an electromagnetic coil on the reed switch; and connecting the electromagnetic coil to a power source. When the power source is in operation, the first contact 3 and the second contact 4 are attracted, connecting the reed switch, battery, and indicator light in series to form a closed circuit, and the indicator light is powered on and illuminates.

Claims

1. A mercury-free wet reed switch, comprising a sealing tube (5), a first reed (1), and a second reed (2), wherein one end of the first reed (1) is located inside the sealing tube (5), and the other end is located outside the sealing tube (5); one end of the second reed (2) is located inside the sealing tube (5), and the other end is located outside the sealing tube (5); the end of the first reed (1) located inside the sealing tube (5) near the second reed (2) has a first contact point (3); the end of the second reed (2) located inside the sealing tube (5) near the first reed (1) has a second contact point (4); characterized in that, The sealed tube (5) is filled with fluorinated liquid.

2. The mercury-free wet reed switch according to claim 1, characterized in that, The sealing tube (5) has an injection port (6), and the injection port (6) is sealed.

3. A mercury-free wet reed switch according to claim 2, characterized in that, The injection port (6) is sealed with epoxy resin.

4. A mercury-free wet reed switch according to claim 1, characterized in that, The sealing tube (5) includes a tube body (8) with openings at both ends. The openings at both ends of the tube body (8) are sealed by rubber plugs (7). The first spring (1) and the second spring (2) are installed on the rubber plugs (7).

5. The manufacturing process of a mercury-free wet reed switch as described in claim 3, characterized in that, The process includes the following: making a hole in the reed switch, injecting fluorinated liquid into the reed switch through the hole, and sealing the hole with epoxy resin after the reed switch is filled with fluorinated liquid.

6. The manufacturing process of a mercury-free reed switch as described in claim 1, characterized in that, Includes the following: The initial state of the sealing tube (5) is that there are openings at both ends. First, the first spring (1) is fixed to one end of the sealing tube (5) and sealed by sintering process. Then, the sealing tube (5) is filled with fluorinated liquid. Then, the second spring (2) is fixed to the other end of the sealing tube (5) and sealed by sintering process.

7. The manufacturing process of a mercury-free reed switch as described in claim 4, characterized in that, Includes the following: fixing the first spring (1) and the second spring (2) to the rubber plug (7), sealing one opening of the tube (8) through the rubber plug (7), filling the tube (8) with fluorinated liquid, and then sealing the other opening of the tube (8) with another rubber plug (7).

8. The method of using a mercury-free reed switch according to any one of claims 1 to 4, characterized in that, Includes the following: a reed switch, a battery and an indicator light are connected in series. When the magnet approaches the reed switch, the first contact (3) and the second contact (4) are attracted together. The reed switch, the battery and the indicator light are connected in series to form a closed circuit. The indicator light is powered on and illuminates.

9. A method of using a mercury-free reed switch as described in any one of claims 1 to 4, characterized in that, Includes the following: connecting a reed switch, a battery, and an indicator light in series, and placing an electromagnetic coil on the reed switch, with the electromagnetic coil connected to the power supply; when the power supply is in the power supply state, the first contact (3) and the second contact (4) are attracted, connecting the reed switch, the battery, and the indicator light in series to form a closed circuit, and the indicator light is powered on and illuminates.

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