Floating ball type liquid level switch

Abstract

The invention discloses a floating ball type liquid level switch which comprises a liquid level rod and a reed pipe connected with an electric wire, the liquid level rod is provided with a cavity for containing the reed pipe, and a limiting structure is arranged in the cavity and used for limiting radial movement of the reed pipe so that the reed pipe can be located in the center of the cavity. The structure is novel, the periphery of the reed pipe is evenly stressed, the reed pipe is not prone to being damaged due to the impact effect, and the service life is long.

Description

Technical Field

[0001] This invention belongs to the field of liquid level switch technology, and particularly relates to a float-type liquid level switch. Background Technology

[0002] The float-type liquid level switch uses the principle of sensing the action of the reed switch by the magnet inside the float. When the medium being measured floats, the magnet inside the float senses the internal reed switch and outputs an action signal, which is then collected by the equipment to detect the level of the liquid.

[0003] like Figure 9 As shown, the float-type liquid level switch in the prior art has the following defects: the inner cavity b of the liquid level rod a has a large space, and the insertion of the reed switch c into the inner cavity b is somewhat random, which cannot guarantee that the reed switch c is in the center position. There is a certain tilt in the inner cavity b. After the epoxy resin is potted, the thickness of the glue around the reed switch c is different. The surface of the reed switch c that is in close contact with the inner cavity b wall has the least amount of glue. After the glue cures, stress will be generated, and the stress will also be different. When the liquid level rod a is subjected to external impact, the impact force is transmitted to the reed switch c, which can easily lead to the breakage of the reed switch c. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide a float-type liquid level switch with a novel structure, uniform stress around the reed switch, which is not easily damaged by impact and has a long service life.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A float-type liquid level switch, comprising:

[0007] A reed switch connected to an electrical wire;

[0008] A level gauge, which has a cavity to accommodate a reed switch;

[0009] Its features are:

[0010] The cavity is equipped with a limiting structure to restrict the radial movement of the reed switch, ensuring that the reed switch is centered within the cavity. This novel liquid level switch design ensures uniform stress distribution around the reed switch, making it less susceptible to impact damage and extending its service life.

[0011] Furthermore, the limiting structure consists of circumferentially distributed ribs located on the inner wall of the cavity. These circumferentially distributed ribs restrict the radial movement range of the reed switch, keeping it essentially vertical and centered within the cavity. The structure is simple and highly practical.

[0012] Furthermore, there is a gap between the rib and the reed switch, which does not affect the reed switch being installed into the cavity.

[0013] Furthermore, the gap is 0-3mm. By reasonably controlling the gap size, it is possible to ensure that the reed switch can be installed into the cavity without affecting its position, and to reduce the tilting range of the reed switch.

[0014] Furthermore, the ribs and the inner wall of the cavity are integrally formed, resulting in a stable structure that is easy to form and quick to manufacture.

[0015] Furthermore, the reed switch is equipped with a flexible protective sleeve, which can buffer the impact force transmitted from the outside to the inside, increase the shock absorption effect, protect the reed switch, make it less prone to damage, and thus extend the service life of the reed switch.

[0016] Furthermore, one end of the flexible protective sleeve extends to the connecting wire, indirectly improving the connection strength between the wire and the reed switch, protecting the connection between the wire and the reed switch from cracking or breaking.

[0017] Furthermore, the cavity is filled with adhesive, which is evenly distributed around the reed switch to effectively fix the reed switch and prevent it from shaking freely. When subjected to external impact, the relatively offset reed switch provides better protection, and the adhesive effectively seals the cavity to prevent water from entering and affecting the sensitivity and accuracy of the level switch.

[0018] Furthermore, the liquid level rod is equipped with a mounting plate, which has a latch for engaging with the external connection hole, allowing for quick installation and disassembly and improving convenience.

[0019] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0020] 1. When the reed switch is inserted into the cavity, the surrounding ribs restrict the radial movement of the reed switch, keeping it basically vertical and located in the center of the cavity. This reduces the difficulty of positioning the reed switch in the cavity. The reed switch is subjected to uniform stress around its perimeter, making it less susceptible to damage from impacts and resulting in a long service life.

[0021] 2. The flexible protective sleeve can buffer the impact force transmitted from the outside to the inside, increase the shock absorption effect, protect the reed switch, make the reed switch less prone to damage, and thus extend the service life of the reed switch. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the internal structure of the liquid level bar in Example 1; Figure 2 This is a schematic diagram showing the positional relationship between the reed switch and the raised rib in Example 1; Figure 3 This is a schematic diagram of the cross-sectional structure of the liquid level bar in Example 1; Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the internal structure of the liquid level bar in Example 2; Figure 6 This is a schematic diagram of the internal structure of the cavity in Example 2; Figure 7 This is a schematic diagram showing the positional relationship between the flexible protective sleeve and the raised rib in Example 2; Figure 8 This is a schematic diagram of the connection between the flexible protective sleeve and the wire in Example 2; Figure 9 This refers to the float-type liquid level switch in the existing technology.

[0031] In the diagram: 1-Level rod; 2-Wire; 3-Reed switch; 4-Cavity; 5-Rib; 6-Adhesive; 7-Mounting plate; 8-Fixing through hole; 9-Latch; 10-Flexible protective sleeve; 11-Baffle; 12-Float. Detailed Implementation

[0032] like Figures 1 to 4 As shown, this is Embodiment 1 of the present invention.

[0033] A float-type liquid level switch includes a liquid level rod 1, a baffle 11, a float 12, and a reed switch 3 connected to an electric wire 2. The baffle 11 is clipped onto the liquid level rod 1, and the float 12 is fitted onto the liquid level rod 1. The liquid level rod 1 has a cavity 4 for accommodating the reed switch 3. A limiting structure is provided inside the cavity 4. The limiting structure consists of at least three or more protruding ribs 5, which are distributed in a ring around the inner wall of the cavity 4.

[0034] When the reed switch 3 is inserted into the cavity 4, the surrounding ribs 5 restrict the radial movement range of the reed switch 3. The reed switch 3 is basically in a vertical position and located in the center of the cavity 4, which reduces the difficulty of positioning the reed switch 3 in the cavity 4. The reed switch 3 is subjected to uniform stress around its perimeter, making it less susceptible to damage from impacts. It has a long service life, and the limiting structure is simple and highly practical.

[0035] The rib 5 and the inner wall of the cavity 4 are integrally formed, which is structurally stable, easy to form, and quick to manufacture.

[0036] The cross-sectional shape of the rib 5 can be various, such as circular or polygonal, but is preferably circular. When the arc surface of the rib 5 contacts the surface of the reed switch 3, the stress distribution is relatively uniform, which can reduce local stress concentration and thus extend the service life of the reed switch 3.

[0037] The gap between the protruding rib 5 and the reed switch 3 is 0-3mm. By reasonably controlling the size of the gap, on the one hand, it does not affect the reed switch 3 from being installed into the cavity 4, and on the other hand, it reduces the tilting amplitude of the reed switch 3.

[0038] The cavity 4 is filled with adhesive 6, which is made of epoxy resin. The adhesive 6 is evenly filled around the reed switch 3, effectively fixing the reed switch 3 and preventing it from shaking freely. When subjected to external impact, the relatively offset reed switch 3 is better protected. In addition, the adhesive 6 effectively seals the cavity 4, preventing water from entering the cavity 4 and affecting the sensitivity and accuracy of the liquid level switch.

[0039] The liquid level rod 1 is provided with a mounting plate 7, the mounting plate 7 is provided with a fixing through hole 8, and a latch 9 is provided in the fixing through hole 8. The fixing through hole 8 provides deformation space for the latch 9. The latch 9 is used to engage with the external connection hole for quick installation and disassembly, which improves convenience.

[0040] like Figures 5 to 8 The image shown is an embodiment two of the present invention.

[0041] Under the technical solution based on Embodiment 1, the reed switch 3 is provided with a flexible protective sleeve 10. The gap between the flexible protective sleeve 10 and the reed switch 3 is 0-3mm. The flexible protective sleeve 10 is made of rubber, which can buffer the impact force transmitted from the outside to the inside, increase the shock absorption effect, protect the reed switch 3, make the reed switch 3 less prone to damage, and thus extend the service life of the reed switch 3.

[0042] One end of the flexible protective sleeve 10 extends to the connecting wire 2, which indirectly improves the connection strength between the wire 2 and the reed switch 3, and protects the connection between the wire 2 and the reed switch 3, making it less prone to cracking or breakage.

[0043] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A float ball type liquid level switch, comprising: a dry reed connected with an electric wire; a liquid level rod having a cavity accommodating the dry reed; characterized in that: a limiting structure is arranged in the cavity, the limiting structure is used to limit the radial movement of the dry reed, and the dry reed is located at the center position of the cavity.

2. A float level switch according to claim 1, characterised in that: The limiting structure is a convex rib distributed in a ring shape, and the convex rib is arranged on the inner wall of the cavity.

3. A float level switch according to claim 2, characterised in that: There is a gap between the convex rib and the dry reed.

4. A float level switch according to claim 3, characterised in that: The gap is 0-3mm.

5. A float level switch according to claim 2, wherein: The convex rib and the inner wall of the cavity are an integral structure.

6. A float level switch according to claim 1, characterized in that: A flexible protective sleeve is arranged outside the dry reed.

7. A float level switch according to claim 6, characterised in that: One end of the flexible protective sleeve extends to the connection of the electric wire.

8. A float level switch according to claim 1, characterized in that: The cavity is filled with an adhesive for fixing the dry reed.

9. A float level switch according to claim 1, wherein: An installation plate is arranged on the liquid level rod, and a clamping tongue is arranged on the installation plate, and the clamping tongue is used to cooperate with the external connecting hole to be buckled.

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