Liquid level float switch

Abstract

The utility model discloses a liquid level float switch, which comprises a shell, a liquid level switch, a liquid level switch and a liquid level switch, the anti-reverse groove is formed in the shell; the fixing frame is inserted into the anti-reverse groove, and a storage area is arranged in the fixing frame; the steel balls are arranged in the storage area; the ballasting iron sand is arranged in the shell; the microswitch is arranged at the top of the fixing frame, and a cable of the microswitch sequentially penetrates through the ballasting iron sand and the bottom of the shell; the waterproof cover covers the fixing frame and the microswitch and is inserted into the ballasting iron sand; the epoxy resin fixes the waterproof cover, the ballasting iron sand, the fixing frame and the shell together. According to the utility model, the transparent special-shaped positioning waterproof cover is additionally arranged, so that water and gas can be prevented, a short-circuit fault caused by tin whiskers can be prevented, the top of the waterproof cover can be prevented from pressing a circuit through the positioning design of the waterproof cover, and the installation consistency is realized. And the problem of switch failure caused by reverse installation of the float switch is also solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level switches, in particular to a liquid level float switch. Background Art

[0002] The liquid level switch is used to detect the underwater liquid level. However, due to the presence of electronic devices in the liquid level switch, it is easy to leak and cause a short circuit when working underwater, making it unusable, resulting in abnormal water level monitoring and waste of water resources. Summary of the invention

[0003] According to an embodiment of the utility model, a liquid level float switch is provided, comprising:

[0004] A housing, wherein a placement cavity is provided inside the housing;

[0005] An anti-reverse groove is provided inside the shell;

[0006] A fixing frame, the fixing frame is inserted into the anti-reverse groove, and a storage area is provided inside the fixing frame;

[0007] Steel balls, which are set in the storage area;

[0008] Heavy iron sand is arranged inside the shell;

[0009] A micro switch is arranged on the top of the fixing frame, and the cable of the micro switch passes through the heavy iron sand and the bottom of the shell in sequence;

[0010] A waterproof cover, which covers the fixing frame and the micro switch and is inserted into the weighted iron sand;

[0011] Epoxy resin, epoxy resin fixes the waterproof cover, weighted iron sand, fixing frame and shell together.

[0012] Furthermore, the shell is composed of an upper shell and a lower shell, and the upper shell cover is arranged on the lower shell.

[0013] Furthermore, the shell is made of ABS plastic.

[0014] Furthermore, the waterproof cover is made of transparent material.

[0015] Furthermore, a limiting protrusion is provided on the inner side of the fixing frame to limit the steel ball from leaving the storage area.

[0016] Furthermore, it also includes: a counterweight block, which is connected to the cable of the micro switch.

[0017] According to the embodiment of the utility model, a liquid level float switch is added with a transparent special-shaped waterproof cover, which can not only prevent water vapor and prevent short circuit failure caused by tin whiskers, but also prevent the top of the waterproof cover from pressing on the circuit to achieve installation consistency. It also solves the problem of switch failure caused by reverse installation of the float switch.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic cross-sectional view of a liquid level float switch according to an embodiment of the utility model.

[0020] Figure 2 The present invention is a schematic structural diagram of a liquid level float switch in use according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0022] First, combine Figure 1~2 A liquid level float switch according to an embodiment of the utility model is described, which is used to detect the height of the water level and has a wide range of application scenarios.

[0023] like Figure 1~2 As shown, a liquid level float switch according to an embodiment of the utility model comprises a housing 1, an anti-reverse groove 2, a fixing frame 3, a steel ball 4, a weighted iron sand 5, a micro switch 6, a waterproof cover 7 and an epoxy resin 8.

[0024] Specifically, Figure 1~2 As shown, a placement cavity 11 is provided inside the shell 1; the anti-reverse groove 2 is opened inside the shell 1; the fixing frame 3 is inserted into the anti-reverse groove 2, and a storage area 31 is provided inside the fixing frame 3; the steel ball 4 is arranged in the storage area 31; the weighted iron sand 5 is arranged inside the shell 1; the micro switch 6 is arranged on the top of the fixing frame 3, and the cable 61 of the micro switch 6 passes through the weighted iron sand 5 and the bottom of the shell 1 in sequence; the waterproof cover 7 covers the fixing frame 3 and the micro switch 6, and is inserted into the weighted iron sand 5; the epoxy resin 8 fixes the waterproof cover 7, the weighted iron sand 5, the fixing frame 3 and the shell 1 together, and a hot melt process is used to prevent the epoxy resin 8 from penetrating, so as to prevent the operation failure caused by the steel ball 4 being stuck.

[0025] Further, if Figure 1~2 As shown, the housing 1 is composed of an upper housing 12 and a lower housing 13, and the upper housing 12 is covered on the lower housing 13 for easy assembly.

[0026] Furthermore, in this embodiment, the housing 1 is made of ABS plastic material, which has a good anti-corrosion effect and can be used for a long time.

[0027] Furthermore, in this embodiment, the waterproof cover 7 is made of a transparent material.

[0028] Further, if Figure 1 As shown, in this embodiment, a limiting protrusion is provided on the inner side of the fixing frame 3 to limit the steel ball 4 from being separated from the storage area 31 to prevent it from being separated and the device cannot be used normally.

[0029] Further, if Figure 1~2 As shown, a liquid level float switch of an embodiment of the utility model further includes: a counterweight block 9, which is connected to a cable 61 of a micro switch 6, so that the liquid level float switch can float up and down relative to the counterweight block 9.

[0030] Working principle:

[0031] The float level switch uses the buoyancy of the liquid to monitor and control the liquid level, as follows:

[0032] When the float liquid level switch is facing upward, the water level rises, and the float is in a vertical state due to buoyancy. The steel ball 4 is located at the bottom of the storage area 31 and does not touch the micro switch 6. At this time, the power is cut off and the water supply is stopped.

[0033] The float liquid level switch is in a hanging state, the water level drops, and the float is in a hanging state due to buoyancy. The steel ball 4 rolls on the top of the storage area 31 and touches the Omron micro switch 6. At this time, power is connected to start water supply.

[0034] Above, refer to Figure 1~2 The invention describes a liquid level float switch according to an embodiment of the utility model, which is equipped with a transparent special-shaped waterproof cover 7, which can not only prevent water vapor and prevent short circuit failure caused by tin whiskers, but also prevent the top of the waterproof cover 7 from pressing on the circuit to achieve installation consistency. It also solves the problem of switch failure caused by reverse installation of the float switch.

[0035] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A liquid level float switch, characterized in that: Include: A housing, wherein a placement cavity is provided inside the housing; an anti-reverse groove, the anti-reverse groove being arranged inside the shell; A fixing frame, the fixing frame is inserted into the anti-reverse groove, and a storage area is provided inside the fixing frame; Steel balls, the steel balls are arranged in the storage area; Weighted iron sand, the weighted iron sand is arranged inside the shell; A micro switch, wherein the micro switch is arranged on the top of the fixing frame, and a cable of the micro switch passes through the weighted iron sand and the bottom of the housing in sequence; A waterproof cover, which covers the fixing frame and the micro switch and is inserted into the weighted iron sand; Epoxy resin, the epoxy resin fixes the waterproof cover, the weighted iron sand, the fixing frame and the shell together.

2. A liquid level float switch as claimed in claim 1, characterized in that: The shell is composed of an upper shell and a lower shell, and the upper shell cover is arranged on the lower shell.

3. A liquid level float switch as claimed in claim 1 or 2, characterized in that: The shell is made of ABS plastic.

4. A liquid level float switch as claimed in claim 1, characterized in that: The waterproof cover is made of transparent material.

5. A liquid level float switch as claimed in claim 1, characterized in that: A limiting protrusion is provided on the inner side of the fixing frame to limit the steel ball from leaving the storage area.

6. A liquid level float switch as claimed in claim 1, characterized in that: It also includes: a counterweight block, which is connected to the cable of the micro switch.

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