Improved magnetic float liquid level meter alarm switch

Abstract

The utility model provides an improved generation magnetic suspension liquid level meter alarm switch belongs to alarm switch technical field, including shell and end cover, end cover is set in the shell top, forms the installation cavity between shell and end cover, is equipped with sending module and two groups of trigger tube in the installation cavity, and trigger tube includes two groups of trigger strip and protection tube, two groups of trigger strip one end is located in the protection tube, and the other end extends the protection tube and sending module electric connection, still be equipped with soft magnetic strip in the protection tube, and soft magnetic strip is located between two groups of trigger strip, and soft magnetic strip and two groups of trigger strip contact form the conductive circuit, the shell one side is equipped with the installation slot, rotatable is equipped with the rotating column in the installation slot, the rotating column both sides all are equipped with the magnetic stripe, and the installation slot opening end is equipped with the sealing cover. The device sets up the trigger tube by two groups of trigger strip, protection tube and soft magnetic strip, and makes the setting of soft magnetic strip and two groups of trigger strip contact form the conductive circuit, reduces the risk of contact failure due to abrasion, corrosion.

Description

Technical Field

[0001] This utility model belongs to the field of alarm switch technology, and more specifically, it relates to an improved magnetic float level gauge alarm switch. Background Technology

[0002] In industrial production and various storage container level monitoring fields, level gauge alarm switches are a commonly used level monitoring and alarm device, widely applied in industries such as petrochemicals, water treatment, and food processing. This allows users to promptly understand changes in the liquid level within the container and trigger an alarm when the level reaches a set value. Traditional triggering structures typically use reed switches, which are prone to poor contact due to wear and corrosion over long-term use, affecting the accuracy and reliability of the triggering. Furthermore, they are often single-wire triggers, making them susceptible to false triggering and alarms, thus disrupting normal production processes. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an improved magnetic float level gauge alarm switch. This solves the technical problem that in the prior art, the traditional triggering structure is usually relatively simple, using a reed switch, which is prone to poor contact due to wear and corrosion during long-term use, thus affecting the accuracy and reliability of the triggering.

[0004] The purpose and effect of this improved magnetic float level gauge alarm switch are achieved by the following specific technical means:

[0005] An improved magnetic float level gauge alarm switch includes a housing and an end cap. The end cap is snapped onto the top of the housing, forming a mounting cavity between the housing and the end cap. The mounting cavity contains a transmitting module and two sets of trigger tubes. Each trigger tube includes two sets of trigger strips and a protective tube. One end of each trigger strip is located inside the protective tube, and the other end extends out of the protective tube and is electrically connected to the transmitting module. A soft magnetic strip is also provided inside the protective tube, positioned between the two sets of trigger strips. The soft magnetic strip contacts the two sets of trigger strips to form a conductive path. A mounting groove is provided on one side of the housing, and a rotating column is rotatably mounted within the mounting groove. Magnetic strips are snapped onto both sides of the rotating column. A sealing cap is provided at the opening end of the mounting groove.

[0006] According to a preferred embodiment, the transmitting module is electrically connected to an external alarm, and the soft magnetic strip is provided with two sets of contact posts. One end of each set of trigger strips is a contact end, and the contact end contacts the contact post.

[0007] According to a preferred embodiment, the soft magnetic strip is provided with two sets of magnetized posts, which extend through the outer shell into the mounting groove.

[0008] According to a preferred embodiment, the rotating column is provided with an electromagnetic shielding layer and is located between the two sets of magnetic strips. The mounting groove is provided with two sets of mounting ears, and the two ends of the rotating column are respectively inserted into the two sets of mounting ears.

[0009] According to a preferred embodiment, each end of the rotating column is provided with a rotating terminal, and the two sets of rotating terminals are provided with locking rings on their periphery. The rotating terminals are connected to the locking rings, and the locking rings are installed on the inner wall of the mounting.

[0010] According to a preferred embodiment, the locking ring is provided with two sets of limiting blocks, each of the limiting blocks having a first magnetic block at both ends, and the rotating terminal having two sets of contact blocks, each of the contact blocks having a second magnetic block on both sides, with the first magnetic block being connected to the second magnetic block.

[0011] According to a preferred embodiment, both ends of the housing are provided with cable outlet ports, and the cable outlet ports are provided with sealing sleeves.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model features a trigger tube consisting of two sets of trigger strips, a protective tube, and a soft magnetic strip, with the soft magnetic strip forming a conductive path with the two sets of trigger strips. After long-term use, users do not need to worry about false alarms or missed alarms due to trigger structure failure. The stable conductive path allows for timely transmission of trigger signals to the transmitting module, enabling users to monitor liquid levels and improving the stability of liquid level monitoring alarms during long-term use.

[0014] 2. When using this device, the user can resist external electromagnetic interference through the electromagnetic shielding layer installed inside the rotating column, ensuring stable operation of the device in complex electromagnetic environments and improving its electromagnetic compatibility. Then, through the coordinated arrangement of the locking ring, limiting block, and the first and second magnetic blocks, the device can limit the rotation range of the rotating terminal, ensuring stable rotation of the rotating column. This benefits the user by providing a robust device structure in environments with complex vibrations and magnetic field variations, such as industrial production, preventing the accuracy of liquid level monitoring from being affected by loose rotating parts or electromagnetic interference, thus improving the device's applicability and durability in complex industrial environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0017] Figure 3 yes Figure 2 Enlarged view of region a in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of the protective tube of this utility model;

[0019] Figure 5 This is a schematic diagram of the mounting ear structure of this utility model.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0021] 11. Outer shell; 12. End cap; 13. Transmitting module; 14. Trigger bar; 15. Protective tube; 16. Soft magnetic strip; 17. Rotating column; 18. Magnetic strip; 19. Sealing cover; 21. Contact column; 22. Magnetized column; 23. Electromagnetic shielding layer; 24. Mounting ear; 25. Rotating terminal; 26. Locking ring; 27. Limiting block; 28. First magnetic block; 29. ​​Contact block; 31. Second magnetic block; 32. Sealing sleeve. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0023] Example:

[0024] like Figures 1 to 5As shown, this utility model provides an improved magnetic float level gauge alarm switch, including a housing 11 and an end cap 12. The end cap 12 is snapped onto the top of the housing 11, forming a mounting cavity between the housing 11 and the end cap 12. The housing 11 and end cap 12 provide a relatively enclosed and stable mounting space for internal components such as the transmitting module 13 and trigger tubes, protecting them from external environmental interference. The mounting cavity houses the transmitting module 13 and two sets of trigger tubes. Each trigger tube includes two sets of trigger bars 14 and a protective tube 15. The trigger bars 14 and the protective tube 15 form the basic structure of the trigger tube, providing a foundation for the generation and transmission of trigger signals. The protective tube 15 also protects the trigger bars 14. One end of each set of trigger bars 14 is located inside the protective tube 15, and the other end extends out of the protective tube 15 and is electrically connected to the transmitting module 13. This connection method allows the signals sensed by the trigger bars 14 to be smoothly transmitted to the transmitting module 13, realizing signal transmission and processing. The protective tube 15 also contains a soft magnetic strip 16, located between the two sets of trigger strips 14. The soft magnetic strip 16 contacts the two sets of trigger strips 14 to form a conductive path. This conductive path, formed by the contact of the soft magnetic strip 16 with the trigger strips 14, allows the soft magnetic strip 16 to change its state when affected by an external magnetic field, thereby generating a trigger signal. Compared to traditional reed switches, this improves the stability and reliability of the triggering. A mounting groove is provided on one side of the outer casing 11, within which a rotating column 17 is rotatably mounted. Magnetic strips 18 are secured on both sides of the rotating column 17. Through the mounting groove, rotating column 17, and magnetic strips 18, the rotating column 17 can rotate within the mounting groove, and the magnetic strips 18 rotate with it. The magnetic interaction between the magnetic strips 18 and the soft magnetic strip 16 controls the triggering state of the trigger tube. A sealing cap 19 is provided at the opening of the mounting groove. The sealing cap 19 prevents external impurities from entering the mounting groove and affecting the rotation of the rotating column 17 and the normal operation of the magnetic strips 18.

[0025] like Figure 2 , 4As shown, the transmitting module 13 is electrically connected to an external alarm. The soft magnetic strip 16 has two sets of contact posts 21, and one end of each set of trigger strips 14 is a contact end, which contacts the contact post 21. Both sets of trigger strips 14 have S poles at their contact ends. The soft magnetic strip 16 has good magnetic permeability; during operation, it is subjected to the magnetic field of the oppositely polarized magnetic strips 18 on both sides of the rotating post 17. When the soft magnetic strip 16 approaches one of the sets of magnetic strips 18, it is magnetized by that strip. Assuming the approaching strip 18 is an S pole, according to the principle of attraction between opposite poles and repulsion between like poles, the end of the soft magnetic strip 16 approaching that strip 18 will be magnetized to an N pole. At this time, the magnetized N pole end of the soft magnetic strip 16 will attract the two sets of trigger strips 14 with S poles. Because the soft magnetic strip 16 is close to the two sets of trigger strips 14, it will pull the two sets of trigger strips 14 together until they contact each other, thus completing the circuit. The trigger signal is transmitted through the conductive circuit, sequentially through the contact post 21 and the trigger bar 14 to the transmitting module 13, and finally sent to the external alarm to realize the alarm function of liquid level change.

[0026] Conversely, when the soft magnetic strip 16 approaches another set of magnetic strips 18 with N polarity, the end of the soft magnetic strip 16 near the magnetic strip 18 will be magnetized into an S pole. The S pole end of the soft magnetic strip 16 will repel the two sets of trigger strips 14 with S poles. Similarly, under the combined effect, the two sets of trigger strips 14 and the soft magnetic strip 16 will repel each other and disconnect the circuit. During this process, the magnetic field strength near the soft magnetic strip 16 satisfies the condition that the attractive force is greater than the repulsive force between the trigger strips 14 plus the mechanical resistance.

[0027] The soft magnetic strip 16 is provided with two sets of magnetized posts 22, which extend through the outer shell 11 into the mounting groove. By setting the magnetized posts 22, the magnetic interaction between the soft magnetic strip 16 and the magnetic strip 18 on the rotating post 17 can be enhanced, making the influence of the rotating post 17 on the soft magnetic strip 16 more significant and improving the triggering sensitivity.

[0028] like Figure 2 , 3 As shown, the rotating column 17 is equipped with an electromagnetic shielding layer 23 located between two sets of magnetic strips 18. Two sets of mounting ears 24 are provided in the mounting groove, with both ends of the rotating column 17 passing through the two sets of mounting ears 24 respectively. The electromagnetic shielding layer 23 reduces the impact of external electromagnetic interference on the operation of the rotating column 17 and the magnetic strips 18, ensuring accurate triggering. The mounting ears 24 provide stable support and a base for rotation of the rotating column 17, ensuring smooth rotation.

[0029] The rotating column 17 has rotating terminals 25 at both ends, and locking rings 26 are provided around the two sets of rotating terminals 25. The rotating terminals 25 are connected to the locking rings 26, and the locking rings 26 are installed on the inner wall of the mounting. By setting the rotating terminals 25 and the locking rings 26, the axial movement of the rotating column 17 can be restricted, ensuring the stability of the rotating column 17 in the mounting groove.

[0030] The locking ring 26 contains two sets of limiting blocks 27, each with a first magnetic block 28 at both ends. The rotating terminal 25 has two sets of contact blocks 29, each with a second magnetic block 31 on both sides. The first magnetic blocks 28 are connected to the second magnetic blocks 31. The arrangement of the limiting blocks 27, the first magnetic blocks 28, the contact blocks 29, and the second magnetic blocks 31 allows for the rotation angle range of the rotating terminal 25, preventing excessive rotation of the rotating column 17 and ensuring stable operation of the device within the set angle range.

[0031] Both ends of the outer casing 11 are provided with cable outlet ports, and sealing sleeves 32 are provided on the cable outlet ports. The cable outlet ports and sealing sleeves 32 provide channels for the internal circuits to be led out and ensure the sealing of the cable outlets to prevent damage to the internal circuits from the external environment.

[0032] The specific usage and function of this embodiment are as follows:

[0033] When using this improved magnetic float level gauge alarm switch, first install the device in a suitable location. When the liquid level in the container changes, the liquid level causes the float to move. The magnetic field of the float affects the magnetic strips 18 on both sides of the rotating column 17, causing the rotating column 17 to rotate within the mounting groove. The electromagnetic shielding layer 23 inside the rotating column 17 prevents external electromagnetic interference from affecting its rotation.

[0034] When the rotating column 17 rotates, the magnetic strip 18 and the soft magnetic strip 16 on it generate magnetic interaction through the magnetized column 22, changing the state of the conductive path formed by the soft magnetic strip 16 and the trigger strip 14. The contact end of one end of the trigger strip 14 contacts the contact post 21 on the soft magnetic strip 16, transmitting the trigger signal to the transmitting module 13 through an electrical connection, and then sending it to the external alarm to realize the liquid level alarm function.

[0035] The rotating terminals 25 at both ends of the rotating column 17 cooperate with the locking ring 26 to restrict the axial movement of the rotating column 17. The limiting block 27 inside the locking ring 26 is connected to the second magnetic block 31 of the contact block 29 on the rotating terminal 25 through the first magnetic block 28, limiting the rotation angle range of the rotating column 17 and ensuring stable operation of the device. At the same time, the protective tube 15 protects the trigger strip 14, the sealing cover 19 prevents impurities from entering the mounting groove, and the outlet port and sealing sleeve 32 ensure the sealing of the internal circuitry.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. An improved magnetic float level gauge alarm switch, comprising a housing (11) and an end cap (12), wherein the end cap (12) is snapped onto the top of the housing (11), and a mounting cavity is formed between the housing (11) and the end cap (12), characterized in that: The mounting cavity is provided with a transmitting module (13) and two sets of trigger tubes. Each trigger tube includes two sets of trigger strips (14) and a protective tube (15). One end of each set of trigger strips (14) is located inside the protective tube (15), and the other end extends out of the protective tube (15) and is electrically connected to the transmitting module (13). A soft magnetic strip (16) is also provided inside the protective tube (15). The soft magnetic strip (16) is located between the two sets of trigger strips (14). The soft magnetic strip (16) contacts the two sets of trigger strips (14) to form a conductive path. A mounting groove is provided on one side of the outer shell (11). A rotating column (17) is rotatably provided in the mounting groove. Magnetic strips (18) are clamped on both sides of the rotating column (17). A sealing cap (19) is provided at the opening end of the mounting groove.

2. The improved magnetic float level gauge alarm switch according to claim 1, characterized in that: The transmitting module (13) is electrically connected to an external alarm. The soft magnetic strip (16) is provided with two sets of contact posts (21). One end of each set of trigger strips (14) is a contact end, and the contact end contacts the contact post (21).

3. The improved magnetic float level gauge alarm switch according to claim 2, characterized in that: The soft magnetic strip (16) is provided with two sets of magnetized pillars (22), which extend through the outer shell (11) into the mounting groove.

4. The improved magnetic float level gauge alarm switch according to claim 1, characterized in that: The rotating column (17) is provided with an electromagnetic shielding layer (23) and is located between the two sets of magnetic strips (18). The mounting groove is provided with two sets of mounting ears (24), and the two ends of the rotating column (17) are respectively inserted into the two sets of mounting ears (24).

5. The improved magnetic float level gauge alarm switch according to claim 4, characterized in that: The rotating column (17) has rotating terminals (25) at both ends. The two sets of rotating terminals (25) are provided with locking rings (26) around their periphery. The rotating terminals (25) are connected to the locking rings (26), and the locking rings (26) are installed on the inner wall of the mounting.

6. The improved magnetic float level gauge alarm switch according to claim 5, characterized in that: The locking ring (26) is provided with two sets of limiting blocks (27), and each of the limiting blocks (27) is provided with a first magnetic block (28) at both ends. The rotating terminal (25) is provided with two sets of contact blocks (29), and each of the contact blocks (29) is provided with a second magnetic block (31) on both sides. The first magnetic block (28) is connected to the second magnetic block (31).

7. The improved magnetic float level gauge alarm switch according to claim 1, characterized in that: Both ends of the outer casing (11) are provided with cable outlet ports, and the cable outlet ports are provided with sealing sleeves (32).

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