Liquid level sensor with circuit board waterproof fixing ring

Abstract

The utility model discloses a liquid level sensor with a circuit board waterproof fixing ring, which comprises a shell, a connecting piece is in threaded connection with the end face of the outer wall of the shell in a sleeved mode, a fixing frame is in threaded connection with the inner wall of the connecting piece, a circuit board is connected with the inner wall of the fixing frame in a clamping mode, the circuit board is electrically connected with a core body, and the core body is in threaded connection with the connecting piece. And the core body abuts against the interior of the connecting piece through the fixing frame, the end face of the connecting piece is in threaded connection with a filter head, and a threaded groove is formed in the end face of the outer wall of the shell. According to the liquid level sensor, the waterproof fixing frame is arranged in the liquid level sensor, so that the circuit board installed in the liquid level sensor can be clamped and fixed, the circuit board can be conveniently installed and disassembled in the later period, the filter head is arranged on the end face of the liquid level sensor, invasion of external silt during detection is prevented, and the detection accuracy is improved. And in addition, the internal liquid can be conveniently and quickly emptied during withdrawing, and is prevented from being retained in the liquid level sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of application of liquid level sensors, in particular to a liquid level sensor with a waterproof fixing ring of a circuit board. Background Art

[0002] There are many types of waterproof liquid level sensors, including contact and non-contact. Contact liquid level sensors are in direct contact with the liquid to be measured and sense the liquid level changes by physical means, while non-contact liquid level sensors use principles such as sound waves and light for measurement. Since non-contact liquid level sensors do not directly contact the liquid, they are more suitable for measuring corrosive media or highly polluted environments. In short, waterproof liquid level sensors use a variety of technical means to achieve high-precision and high-reliability liquid level measurement. They are widely used in various occasions that require waterproofing or liquid level monitoring, providing important technical support for industrial automation and safety monitoring.

[0003] When the existing liquid level sensor is assembled and connected, the internal circuit board is generally placed directly inside the waterproof shell, and it cannot be installed and fixed in position, so that it moves inside the shell during use, which may cause the connection wire connector electrically connected to the circuit board to fall off. The inability to stably fix it for use affects the economic use efficiency of the entire liquid sensor during use, and when the entire liquid level sensor is placed in the detection liquid, its end face position may be blocked by the invasion of mud and sand in the liquid. Therefore, the utility model proposes a liquid level sensor with a waterproof circuit board fixing ring. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a liquid level sensor with a waterproof fixing ring for a circuit board. A waterproof fixing frame is arranged inside the liquid level sensor so that the circuit board installed inside can be clamped and fixed, which is convenient for installation and later disassembly of the circuit board. A filter head is arranged on the end face of the liquid level sensor to prevent the invasion of external mud and sand during detection, and to facilitate the rapid emptying of internal liquid when it is retracted to prevent it from being retained inside the liquid level sensor.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a liquid level sensor with a waterproof fixing ring for a circuit board, comprising a shell, a connecting piece is threadedly sleeved at the end face of the outer wall of the shell, a fixing frame is threadedly connected to the inner wall of the connecting piece, a circuit board is snap-connected to the inner wall of the fixing frame, the circuit board is electrically connected to a core body, and the core body is pressed against the inside of the connecting piece through the fixing frame, and a filter head is threadedly connected to the end face of the connecting piece.

[0006] The utility model is further configured as follows: a threaded groove can be provided at the end surface position of the outer wall of the shell and the end surface position of the outer wall of the connecting piece, and the end surface position of the outer wall of the shell is threadedly connected to the inner wall of the connecting piece through the threaded groove, or the end surface position of the outer wall of the connecting piece is threadedly connected to the inner wall of the shell through the threaded groove.

[0007] Through the above technical solution, the connector can carry the internal circuit board and be threadedly connected to the inside of the shell, making the connection between the two more convenient and improving the convenience of disassembly after assembly.

[0008] The utility model is further configured as follows: the circuit board is electrically connected with a connecting wire, the connecting wire runs through the bottom of the shell, and the sealing locking piece fixedly connected through the end surface of the shell is sealed.

[0009] The above technical solution facilitates the sealing installation and fixation of the connecting wire, and facilitates the subsequent disassembly and replacement operations.

[0010] The utility model is further configured as follows: a threaded boss is arranged on the top of the connecting piece, and the threaded boss is threadedly connected to the inner wall of the filter head.

[0011] Through the above technical solution, it is convenient to install the filter head on the end face of the connector, so that when detecting liquid, the external liquid enters the interior through the filter head and can be detected by the core body.

[0012] The utility model is further configured as follows: a plurality of slots are radially and equidistantly formed on the inner wall of the fixing frame, and the circuit board is snap-connected to the inside of the slots.

[0013] Through the above technical solution, when the circuit board is installed, it can be clamped and fixed inside the card slot, and placed inside the fixing frame to play a protective effect.

[0014] The utility model is further configured as follows: a threaded ring is arranged on the end surface of the fixing frame, and the outer wall of the threaded ring is threadedly connected to the inner wall of the connecting piece.

[0015] Through the above technical solution, when the fixing frame is installed, it can be stably installed inside the connecting piece, and the core body can be pressed and fixed.

[0016] The utility model is further configured as follows: the end face of the filter head is configured as a chamfered inclined surface, and a plurality of filter holes distributed in a circumference are opened on the inclined surface.

[0017] The above technical solution can prevent external mud and sand from entering the interior when the liquid level is detected, and can also facilitate the emptying of the internal liquid when the sensor is picked up.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The utility model proposes a liquid level sensor with a circuit board waterproof fixing ring. By arranging a waterproof fixing frame inside the liquid level sensor, it can clamp and fix the circuit board installed inside, which is convenient for installation and later disassembly of the circuit board;

[0020] 2. The utility model proposes a liquid level sensor with a circuit board waterproof fixing ring. A filter head is arranged on the end face of the liquid level sensor to prevent the intrusion of external mud and sand during detection, and facilitates the rapid emptying of the internal liquid during retraction to prevent it from being retained inside the liquid level sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a liquid level sensor with a circuit board waterproof fixing ring according to the utility model;

[0022] Figure 2 This is a first exploded view of a liquid level sensor with a circuit board waterproof fixing ring according to the utility model;

[0023] Figure 3 This is a second exploded view of a liquid level sensor with a circuit board waterproof fixing ring according to the utility model;

[0024] Figure 4 The utility model is a cross-sectional structural diagram of a liquid level sensor with a circuit board waterproof fixing ring.

[0025] In the figure: 100, housing; 101, threaded groove; 102, sealing locking member; 200, connecting member; 201, threaded boss; 300, fixing frame; 301, slot; 302, threaded ring; 303, circuit board; 304, core; 305, connecting wire; 400, filter head; 401, filter hole. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] like Figure 1-Figure 4As shown, a liquid level sensor with a circuit board waterproof fixing ring includes a housing 100. The outer wall end surface of the housing 100 and the outer wall end surface of the connector 200 can be provided with a threaded groove 101. The outer wall end surface of the housing 100 is threadedly connected to the inner wall of the connector 200 through the threaded groove 101, or the outer wall end surface of the connector 200 is threadedly connected to the inner wall of the housing 100 through the threaded groove 101, so that the connector 200 can carry the internal circuit board 302 and be threadedly connected to the inside of the housing 100, so that the connection between the two is more convenient, and the convenience of disassembly after assembly is improved. The outer wall end surface of the housing 100 is threadedly sleeved with a connector 200, and a threaded boss 201 is provided on the top of the connector 200, and the threaded boss 201 is threadedly connected to the inner wall of the filter head 400, so that the filter head 400 can be installed on the end surface of the connector 200, so that when detecting liquid, the external liquid enters the interior through the filter head 400, so that it can be detected by the core 304, and the inner wall of the connector 200 is threadedly connected with a fixing frame 300, and the inner wall of the fixing frame 300 is radially equidistantly provided with a plurality of slots 301, and the circuit board 303 is snap-connected to the inside of the slot 301, so that when the circuit board 303 is detected, the fixing frame 300 is threadedly connected to the inner wall of the fixing frame 300, and the fixing frame 300 is radially equidistantly provided with a plurality of slots 301, and the circuit board 303 is snap-connected to the inside of the slot 301, so that when the circuit board 303 is detected, the fixing frame 300 is snap-connected to the inner wall of the fixing frame 300, and the fixing frame 300 is snap-connected to the inner wall of the fixing frame 30 ... and the fixing frame 300 is snap-connected to the inner wall of the fixing frame 301, so that when the circuit board 303 is detected, the fixing frame 300 is snap-connected to the inner wall of the fixing frame 300, and the fixing frame 300 is snap- 03 is installed, it can be fixed in the card slot 301, and placed in the interior of the fixing frame 300 for protection. The end face of the fixing frame 300 is provided with a threaded ring 302, and the outer wall of the threaded ring 302 is threadedly connected to the inner wall of the connecting piece 200, so that when the fixing frame 300 is installed, it can be stably installed in the interior of the connecting piece 200, and the core 304 is pressed and fixed. The inner wall of the fixing frame 300 is connected with a circuit board 303, and the circuit board 303 is electrically connected with a connecting wire 305. The connecting wire 305 runs through the bottom of the shell 100 and passes through the end face of the shell 100. The fixedly connected sealing locking member 102 is sealed, which is convenient for sealing and fixing the connecting line 305 and for later disassembly and replacement. The circuit board 303 is electrically connected to the core 304, and the core 304 is pressed against the inside of the connecting member 200 through the fixing frame 300. The end face of the connecting member 200 is threadedly connected to a filter head 400. The end face of the filter head 400 is chamfered and has a plurality of filter holes 401 distributed circumferentially on the inclined surface. This is convenient for preventing external mud and sand from entering the interior when the liquid level is detected, and is also convenient for draining the internal liquid when the sensor is picked up.

[0028] When the utility model is in use, firstly, the connecting wire 305 is inserted into the interior of the shell 100 to be electrically connected with the circuit board 303, and at the same time, the core 304 is connected to the circuit board 303 through the wire body through the connector 200, and then the circuit board 303 is snap-connected to the inside of the card slot 301, and then the fixing frame 300 is threadedly connected to the inside of the connector 200 through the threaded ring 302 on the end face, and the core 304 pre-placed in the connector 200 is pressed and fixed, and then the connector 200 is threadedly connected to the end face of the shell 100, so that the internal fixing frame 300 is placed inside the shell 100, and finally the filter head 400 is threadedly connected to the end face of the connector 200, so that the liquid passes through the multiple filter holes 401 on the inclined surface and enters the inside of the connector 200 for detection.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid level sensor with a circuit board waterproof fixing ring, comprising a housing (100), characterized in that: A connecting piece (200) is threadedly sleeved on the end surface of the outer wall of the housing (100); a fixing frame (300) is threadedly connected to the inner wall of the connecting piece (200); a circuit board (303) is snap-connected to the inner wall of the fixing frame (300); the circuit board (303) is electrically connected to a core body (304), and the core body (304) is pressed against the inside of the connecting piece (200) through the fixing frame (300); and a filter head (400) is threadedly connected to the end surface of the connecting piece (200).

2. A liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: The outer wall end surface of the shell (100) and the outer wall end surface of the connecting piece (200) may be provided with a threaded groove (101); the outer wall end surface of the shell (100) is threadedly connected to the inner wall of the connecting piece (200) via the threaded groove (101), or the outer wall end surface of the connecting piece (200) is threadedly connected to the inner wall of the shell (100) via the threaded groove (101).

3. The liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: The circuit board (303) is electrically connected to a connecting wire (305), the connecting wire (305) passes through the bottom of the housing (100), and is sealed by a sealing locking member (102) fixedly connected to the end surface of the housing (100).

4. The liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: A threaded boss (201) is provided on the top of the connecting piece (200), and is threadably connected to the inner wall of the filter head (400) via the threaded boss (201).

5. The liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: The inner wall of the fixing frame (300) is provided with a plurality of slots (301) at equal intervals in the radial direction, and the circuit board (303) is snap-fitted and connected inside the slots (301).

6. The liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: A threaded ring (302) is provided on the end surface of the fixing frame (300), and the outer wall of the threaded ring (302) is threadedly connected to the inner wall of the connecting piece (200).

7. The liquid level sensor with a circuit board waterproof fixing ring according to claim 1, characterized in that: The end surface of the filter head (400) is arranged in the form of a chamfered inclined surface, and a plurality of filter holes (401) distributed in a circumference are provided on the inclined surface.

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