CN210956550U

CN210956550U - Liquid level switch with self-checking device

Info

Publication number: CN210956550U
Application number: CN201921445718.6U
Authority: CN
Inventors: 毛伟华; 张燕飞; 康涛
Original assignee: Nantong Haishi Shipping Machine Co ltd
Current assignee: Nantong Haishi Shipping Machine Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-07-07
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses a take self-checking device's liquid level switch, including casing, floater, reed and contact, the casing is provided with the boss on being close to the inner wall of floater, rotate through the pivot between floater and the boss and be connected, and the extension end of floater is provided with outer magnet. The utility model discloses in, through the setting of spring, can give the self-checking pole and press a vertical ascending elasticity of ball, will press the ball in-process of pressing downwards, the self-checking pole bumps and touches outer magnet steel, can be used to detect whether the floater can normally rotate, after outer magnet steel rotates, can give repulsion force of inner magnet steel, make inner magnet steel drive lever and take place to rotate, make the magnet bar promote the reed, the movable contact separates with the stationary contact, make the signalling device signals in the circuit, so that know whether the contact is normal, and need dismantle just can detect whether the internal plant is normal like ordinary liquid level switch, and the device's simple structure, convenient in daily use.

Description

Liquid level switch with self-checking device

Technical Field

The utility model relates to a liquid level switch technical field especially relates to take liquid level switch of self-checking device.

Background

The float level switch uses magnetic force to operate, has no mechanical connecting piece, and operates simply and reliably, and when the float switch measured medium floats the float, the float drives the main part to move, and the magnet at the other end of the float controls the magnet on the switch action rod.

The prior patent discloses a marine floater liquid level switch of patent number ZL01272741.5, which comprises a housin, casing facial make-up floater support, the floater passes through the movable dress of axle on the floater support with the outer magnet steel sub-assembly, the built-in magnet steel band movable contact on-off mechanism in the casing, this marine floater liquid level switch utilizes lever theory of operation, rely on the magnetic force work of magnet steel, it is reliable with the contact, job stabilization nature is good, and have good insulating properties, high temperature resistant, but extensive application is shipbuilding, oil, trades such as chemical industry, but there are some weak points among the prior art: for example, whether current floater level switch is difficult to judge to level switch normal operating, if floater level switch is malfunctioning or can not normally work, can lead to equipment failure and other potential safety hazards.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the liquid level switch with the self-checking device is provided for solving the problem that whether the existing floating ball liquid level switch is difficult to judge for the normal operation of the liquid level switch.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the liquid level switch with the self-checking device comprises a shell, a floating ball, a reed and a contact, wherein a boss is arranged on the inner wall, close to the floating ball, of the shell, the floating ball is rotatably connected with the boss through a rotating shaft, an outer magnetic steel is arranged at the extending end of the floating ball, a lever is arranged in an inner cavity of the shell, an inner magnetic steel is fixed at the center of the lever, magnetic rods are arranged at the vertical two ends of the lever, and a self-checking mechanism is arranged at the top of the shell.

As a further description of the above technical solution:

the top of the shell is provided with a bulge.

As a further description of the above technical solution:

the self-checking mechanism consists of a self-checking rod, a spring and a pressing ball, the self-checking rod is slidably embedded in the inner cavity of the protrusion, and the pressing ball is arranged at the top of the self-checking rod.

As a further description of the above technical solution:

the pressing ball is elastically connected with the bulge through a spring.

As a further description of the above technical solution:

and the bottom of the shell is provided with a grounding screw.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model discloses in, through the setting of spring, can give the self-checking pole and press a vertical ascending elasticity of ball, will press the ball in-process of pressing downwards, the self-checking pole bumps and touches outer magnet steel, can be used to detect whether the floater can normally rotate, after outer magnet steel rotates, can give repulsion force of inner magnet steel, make inner magnet steel drive lever and take place to rotate, make the magnet bar promote the reed, the movable contact separates with the stationary contact, make the signalling device signals in the circuit, so that know whether the contact is normal, and need dismantle just can detect whether the internal plant is normal like ordinary liquid level switch, and the device's simple structure, convenient in daily use.

Drawings

Fig. 1 shows a schematic diagram of an external structure of a housing according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an internal structure of a housing according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a self-checking mechanism provided according to an embodiment of the present invention;

illustration of the drawings:

1. a housing; 2. a self-checking mechanism; 3. a protrusion; 4. a floating ball; 5. a reed; 6. a contact; 7. internal magnetic steel; 8. external magnetic steel; 9. a boss; 10. a lever; 11. a magnetic bar; 12. a ground screw; 201. a self-checking rod; 202. a spring; 203. the ball is pressed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a liquid level switch with a self-checking device comprises a shell 1, a floating ball 4, a reed 5 and a contact 6, wherein the contact 6 is composed of a movable contact and a fixed contact, the fixed contact is fixed on the side wall of the shell 1, the movable contact is fixedly connected with the reed 5, a boss 9 is arranged on the inner wall of the shell 1 close to the floating ball 4, the floating ball 4 is rotatably connected with the boss 9 through a rotating shaft, an extending end of the floating ball 4 is provided with an external magnet steel 8, an inner cavity of the shell 1 is provided with a lever 10, an internal magnet steel 7 is fixed at the center of the lever 10, the lever 10 is fixedly connected with the internal magnet steel 7, a repulsive force is arranged between the external magnet steel 8 and the internal magnet steel 7, magnetic rods 11 are arranged at the vertical two ends of the shell, the magnetic rods 11 are rotatably connected with the.

Specifically, as shown in fig. 2 and 3, the top of the housing 1 is provided with the protrusion 3, the self-checking mechanism 2 is composed of a self-checking rod 201, a spring 202 and a pressing ball 203, the self-checking rod 201 is slidably inserted into an inner cavity of the protrusion 3, the self-checking rod 201 can move in the vertical direction in the inner cavity of the protrusion 3, the pressing ball 203 is arranged at the top of the self-checking rod 201, the pressing ball 203 and the self-checking rod 201 are of an integrated structure, and the pressing ball 203 can drive the self-checking rod 201 to move in the vertical direction.

Specifically, as shown in fig. 2 and 3, the pressing ball 203 is elastically connected to the protrusion 3 through the spring 202, one end of the spring 202 is fixedly connected to the pressing ball 203, the other end of the spring 202 is fixedly connected to the protrusion 3, and the spring 202 provides the pressing ball 203 with a vertical upward elastic force.

Specifically, as shown in fig. 1 and 2, the bottom of the housing 1 is provided with a grounding screw 12, and the grounding screw 12 increases the safety of the device.

The working principle is as follows: when the device is used, the pressing ball 203 is pressed downwards, the pressing ball 203 drives the self-checking rod 201 to move towards the inner cavity of the shell 1, the self-checking rod 201 gives pressure to the outer magnet steel 8, so that the outer magnet steel 8 drives the floating ball 4 to rotate, whether the floating ball 4 can normally rotate can be checked, after the outer magnet steel 8 drives the floating ball 4 to rotate, the outer magnet steel 8 gives a repulsive force to the inner magnet steel 7, the inner magnet steel 7 drives the lever 10 to rotate, and in the rotating process of the lever 10, the magnet rod 11 pushes the reed 5 to separate the movable contact from the fixed contact, so that the alarm device in the circuit outputs an alarm signal, whether the contact 6 is normal can be detected, whether the internal equipment is normal can be detected unlike an ordinary liquid level switch which needs to be disassembled, and the device is simple in structure and convenient to use in daily.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The liquid level switch with the self-checking device comprises a shell (1), a floating ball (4), a reed (5) and a contact (6), and is characterized in that a boss (9) is arranged on the inner wall, close to the floating ball (4), of the shell (1), the floating ball (4) is rotatably connected with the boss (9) through a rotating shaft, an outer magnet (8) is arranged at the extending end of the floating ball (4), a lever (10) is arranged in an inner cavity of the shell (1), an inner magnet (7) is fixed at the center of the lever (10), magnetic rods (11) are arranged at the vertical two ends of the lever, and a self-checking mechanism (2) is arranged at the top of the shell (1).

2. The liquid level switch with self-checking device according to claim 1, characterized in that the top of the housing (1) is provided with a protrusion (3).

3. The liquid level switch with the self-checking device according to claim 2, wherein the self-checking mechanism (2) comprises a self-checking rod (201), a spring (202) and a pressing ball (203), the self-checking rod (201) is slidably embedded in an inner cavity of the protrusion (3), and the pressing ball (203) is arranged at the top of the self-checking rod (201).

4. The switch according to claim 3, wherein the pressing ball (203) is elastically connected to the protrusion (3) by a spring (202).

5. The level switch with self-checking device according to claim 1, characterized in that the bottom of the housing (1) is provided with a grounding screw (12).