A float type liquid level switch

Abstract

The utility model discloses a kind of float ball type liquid level switches, including liquid level rod and the dry reed tube connected with electric wire, liquid level rod has the cavity containing dry reed tube, limit structure is equipped in cavity, limit structure is used to limit dry reed tube radial activity, make dry reed tube be located at the central position of cavity.The utility model structure is novel, dry reed tube periphery is evenly stressed, not easy to be damaged by impact effect, long service life.

Description

Technical Field

[0001] This utility model 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 utility model 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: A float-type liquid level switch, comprising: A reed switch connected to an electrical wire; A level gauge, which has a cavity to accommodate a reed switch; Its features are: 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.

[0006] 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 positioned at the center of the cavity. The structure is simple and highly practical.

[0007] Furthermore, there is a gap between the rib and the reed switch, which does not affect the reed switch being installed into the cavity.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects: 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.

[0015] 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

[0016] 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 4This 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 is a schematic diagram of the structure of a float-type liquid level switch in the prior art.

[0017] 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

[0018] like Figures 1 to 4 The image shown is an embodiment of this utility model. 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figures 5 to 8 The image shown is a second embodiment of this utility model. 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.

[0026] 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.

[0027] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A float-type liquid level switch, comprising: A reed switch connected to an electrical wire; A liquid level rod having a cavity for accommodating the reed switch; Its features are: The cavity is provided with a limiting structure, which is used to restrict the radial movement of the reed switch, so that the reed switch is located at the center of the cavity.

2. The float-type liquid level switch according to claim 1, characterized in that: The limiting structure consists of convex ribs arranged in a ring, which are located on the inner wall of the cavity.

3. A float-type liquid level switch according to claim 2, characterized in that: There is a gap between the rib and the reed switch.

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

5. A float-type liquid level switch according to claim 2, characterized in that: The rib is integrally formed with the inner wall of the cavity.

6. A float-type liquid level switch according to claim 1, characterized in that: The reed switch is provided with a flexible protective sleeve.

7. A float-type liquid level switch according to claim 6, characterized in that: One end of the flexible protective sleeve extends to connect to the wire.

8. A float-type liquid level switch according to claim 1, characterized in that: The cavity is filled with adhesive, which is used to fix the reed switch.

9. A float-type liquid level switch according to claim 1, characterized in that: The liquid level rod is provided with a mounting plate, and the mounting plate is provided with a latch, which is used to engage with an external connection hole for fastening.

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