Liquid level switch

Abstract

The utility model discloses a liquid level switch which comprises a switch body, a protective shell is arranged on the outer side of the switch body, a connecting pipe is fixedly connected to the lower end of the interior of the switch body, first screws are symmetrically arranged at the bottom of the connecting pipe, and floating balls are slidably connected to the outer sides of the first screws. A high-position sensor is arranged on one side of one first screw rod, a bottom-position sensor is arranged on one side of the other first screw rod, metal sensing pieces are arranged at the bottom of the high-position sensor and the top of the bottom-position sensor, and the multiple first screw rods are in threaded connection through protruding blocks and grooves so that the length of the liquid level switch can be adjusted; the high-position sensor and the bottom-position sensor can move on one side of the first screw rod through threaded connection of the threaded cylinder and the first screw rod, so that the length can be conveniently adjusted according to actual use requirements, the positions of the sensors can be conveniently adjusted according to different actual water levels, and the application range of the liquid level switch is widened.

Description

Technical Field

[0001] This utility model belongs to the field of liquid level switch technology, and specifically relates to a liquid level switch. Background Technology

[0002] A level switch, also known as a water level switch or level sensor, is, as the name suggests, a switch used to control the level of liquid. It is mainly divided into contact and non-contact types. Commonly used non-contact switches include capacitive level switches, while the most widely used contact type is the float level switch. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

[0003] Traditional level switches have a relatively fixed length, making it inconvenient to adjust the length according to actual usage needs and to adjust the position of the sensor according to different water levels. This reduces the applicability of the level switch and makes it inconvenient to install and disassemble, thus making it inconvenient to maintain the level switch. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a liquid level switch to solve the problems mentioned in the background art, such as the fixed length of traditional liquid level switches, which are not convenient to adjust the length according to actual use needs, and the inconvenience to adjust the position of the sensor according to different water levels, thereby reducing the applicable range of the liquid level switch, and the inconvenience of installation and disassembly, which in turn makes the liquid level switch inconvenient to maintain.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a liquid level switch, comprising a switch body, a protective shell provided on the outside of the switch body, a connecting pipe fixedly connected to the lower end of the switch body, first screws symmetrically arranged at the bottom of the connecting pipe, a float ball slidably connected to the outside of the first screws, a high-level sensor provided on one side of one of the first screws, a low-level sensor provided on one side of the other of the first screws, metal sensing plates provided at the bottom of the high-level sensor and the top of the low-level sensor, sensing blocks fixedly connected to the bottom of the high-level sensor and the top of the low-level sensor, a fixed cylinder fixedly connected to one side of the high-level sensor and the low-level sensor, a threaded cylinder fixedly connected to the top of the fixed cylinder, and clamping plates symmetrically arranged inside the fixed cylinder.

[0006] Preferably, a sealing ring is fixedly connected inside the protective shell.

[0007] Preferably, a connecting frame is symmetrically fixedly connected to one side of the protective shell, and a fixing block is symmetrically fixedly connected to one side of the top of the switch body. A sliding groove is provided inside one side of the connecting frame, and a telescopic rod is fixedly connected to one side of the sliding groove. A pull plate is fixedly connected to one end of the telescopic rod, and the pull plate and the sliding groove are slidably connected. A first spring is fixedly connected between one side of the sliding groove and one side of the pull plate.

[0008] Preferably, the pull plate is engaged with the fixing block via a positioning rod.

[0009] Preferably, a protrusion is fixedly connected to the top of the first screw, and the protrusion and the connecting pipe are connected by a thread. A groove is provided at the lower end inside the first screw, and the protrusion and the groove are connected by a thread.

[0010] Preferably, each of the metal sensor sheets is fixedly connected to the high-position sensor and the low-position sensor respectively via a second spring, and a warning light is fixedly connected to the other side of each of the high-position sensor and the low-position sensor.

[0011] Preferably, the threaded cylinder and the first screw are connected by a thread.

[0012] Preferably, a second screw is symmetrically threaded to one side of the inside of the fixed cylinder, and a rotating seat is fixedly connected to one side of the clamping plate. The rotating seat and the second screw are rotatably connected.

[0013] Compared with the prior art, the present invention provides a liquid level switch, which has the following beneficial effects:

[0014] 1. This utility model adjusts the length of the liquid level switch by setting multiple first screws connected by protrusions and grooves. The high-level sensor and the low-level sensor can be moved to one side of the first screw through the threaded connection between the threaded cylinder and the first screw, which facilitates length adjustment according to actual use needs and sensor position adjustment according to different actual water levels, thereby increasing the applicability of the liquid level switch.

[0015] 2. This utility model uses a clamping plate to clamp the first screw. After the position is determined, the second screw is rotated. The second screw is threadedly connected to the fixed cylinder, which pushes the clamping plate to move inside the fixed cylinder, thereby clamping and fixing the first screw. This increases the stability of the connection and prevents the connection from loosening due to the impact of water flow during long-term use, which would affect the use of the high-level sensor and the low-level sensor. In addition, this device adopts a modular design, which is simple in structure and easy to connect between components. This facilitates the quick installation and disassembly of the level switch, facilitates the subsequent maintenance of the level switch, and improves the service life of the level switch.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is an isometric structural diagram of one side of a liquid level switch proposed in this utility model;

[0019] Figure 2 This is an isometric structural diagram of the other side of a liquid level switch proposed in this utility model;

[0020] Figure 3 This is a front cross-sectional view of a liquid level switch proposed in this utility model.

[0021] Figure 4 This is a top cross-sectional view of a liquid level switch proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the threaded cylinder structure of a liquid level switch proposed in this utility model;

[0023] Figure 6 This is a schematic diagram of the clamping plate structure of a liquid level switch proposed in this utility model;

[0024] Figure 7 This is a schematic diagram of the metal sensing element structure of a liquid level switch proposed in this utility model;

[0025] In the diagram: 1. Switch body; 2. Protective housing; 3. Sealing ring; 4. Connecting frame; 5. Fixing block; 6. Slide groove; 7. Telescopic rod; 8. Pull plate; 9. First spring; 10. Positioning rod; 11. Connecting pipe; 12. First screw; 13. Protrusion; 14. Groove; 15. Float; 16. High position sensor; 17. Low position sensor; 18. Metal sensing plate; 19. Second spring; 20. Sensing block; 21. Warning light; 22. Fixing cylinder; 23. Threaded cylinder; 24. Second screw; 25. Clamping plate; 26. Rotating seat. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7 This utility model provides a technical solution: a liquid level switch, including a switch body 1, a protective shell 2 on the outside of the switch body 1, a connecting pipe 11 fixedly connected to the lower end inside the switch body 1, a first screw 12 symmetrically arranged at the bottom of the connecting pipe 11, a float ball 15 slidably connected to the outside of the first screw 12, a high-level sensor 16 arranged on one side of one first screw 12, and a low-level sensor 17 arranged on one side of the other first screw 12, a metal sensing plate 18 arranged at the bottom of the high-level sensor 16 and the top of the low-level sensor 17, a sensing block 20 fixedly connected to the bottom of the high-level sensor 16 and the top of the low-level sensor 17, a fixed cylinder 22 fixedly connected to one side of the high-level sensor 16 and the low-level sensor 17, a threaded cylinder 23 fixedly connected to the top of the fixed cylinder 22, and clamping plates 25 symmetrically arranged inside the fixed cylinder 22.

[0028] In this utility model, preferably, a sealing ring 3 is fixedly connected inside the protective shell 2.

[0029] In this utility model, preferably, a connecting frame 4 is symmetrically fixedly connected to one side of the protective shell 2, a fixing block 5 is symmetrically fixedly connected to one side of the top of the switch body 1, a sliding groove 6 is provided inside one side of the connecting frame 4, a telescopic rod 7 is fixedly connected inside one side of the sliding groove 6, a pull plate 8 is fixedly connected to one end of the telescopic rod 7, the pull plate 8 and the sliding groove 6 are slidably connected, and a first spring 9 is fixedly connected between one side of the sliding groove 6 and one side of the pull plate 8.

[0030] In this utility model, preferably, the pull plate 8 is engaged with the fixing block 5 by the positioning rod 10.

[0031] In this utility model, preferably, a protrusion 13 is fixedly connected to the top of the first screw 12, and the protrusion 13 and the connecting pipe 11 are connected by a thread. A groove 14 is provided at the lower end inside the first screw 12, and the protrusion 13 and the groove 14 are connected by a thread. The length of the liquid level switch is adjusted by the threaded connection between the multiple first screws 12 through the protrusion 13 and the groove 14.

[0032] In this utility model, preferably, the metal sensing plates 18 are fixedly connected to the high-position sensor 16 and the low-position sensor 17 respectively by the second spring 19, and a warning light 21 is fixedly connected to the other side of the high-position sensor 16 and the low-position sensor 17.

[0033] In this utility model, preferably, the threaded cylinder 23 and the first screw 12 are connected by a thread. The high-position sensor 16 and the low-position sensor 17 can be moved to one side of the first screw 12 through the threaded connection between the threaded cylinder 23 and the first screw 12. This facilitates length adjustment according to actual usage requirements and allows for adjustment of the sensor position according to different actual water levels, thereby increasing the applicability of the liquid level switch.

[0034] In this utility model, preferably, a second screw 24 is symmetrically threaded to one side of the inside of the fixed cylinder 22, and a rotating seat 26 is fixedly connected to one side of the clamping plate 25. The rotating seat 26 and the second screw 24 are rotatably connected.

[0035] The working principle and usage process of this utility model are as follows: In use, firstly, the length of the liquid level switch is adjusted by connecting multiple first screws 12 with protrusions 13 and grooves 14 according to actual usage requirements. Then, the high-level sensor 16 and the low-level sensor 17 are moved to one side of the first screw 12 via a threaded cylinder 23, determining their positions. This facilitates length adjustment according to actual usage requirements and allows for adjustment of sensor positions based on different water levels, increasing the applicability of the liquid level switch. After determining the positions, the second screw 24 is rotated. The second screw 24 is threadedly connected to the fixed cylinder 22, pushing the clamping plate 25 to move inside the fixed cylinder 22. This clamping plate 25 clamps and fixes the first screw 12, increasing connection stability and preventing loosening due to prolonged water flow impact, which could affect the high level switch's performance. The use of level sensor 16 and bottom level sensor 17: During operation, when the liquid level rises, the float 15 moves upward and collides with the metal sensing plate 18 at the bottom of the high level sensor 16. The metal sensing plate 18 compresses the second spring 19 and makes it contact the sensing block 20. The internal sensor of the high level sensor 16 receives the signal, and at the same time, the warning light 21 lights up, indicating that the liquid level has reached the high level. When the liquid level drops, the float 15 moves downward and collides with the metal sensing plate 18 at the top of the bottom level sensor 17. The metal sensing plate 18 compresses the second spring 19 and makes it contact the sensing block 20. The internal sensor of the high level sensor 16 receives the signal, and at the same time, the warning light 21 lights up, indicating that the liquid level has reached the high level. The overall structure adopts a modular design, which is simple in structure and easy to connect between components. This facilitates quick installation and disassembly of the level switch, facilitates subsequent maintenance of the level switch, and improves the service life of the level switch.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid level switch, comprising a switch body (1), characterized in that: The switch body (1) is provided with a protective shell (2) on the outside. The lower end of the switch body (1) is fixedly connected to a connecting pipe (11). The bottom of the connecting pipe (11) is symmetrically provided with a first screw (12). A float (15) is slidably connected to the outside of the first screw (12). A high position sensor (16) is provided on one side of one of the first screws (12), and a low position sensor (17) is provided on the other side of the first screw (12). Metal sensing plates (18) are provided at the bottom of the high position sensor (16) and the top of the low position sensor (17). Sensing blocks (20) are fixedly connected to the bottom of the high position sensor (16) and the top of the low position sensor (17). A fixed cylinder (22) is fixedly connected to one side of the high position sensor (16) and the low position sensor (17). A threaded cylinder (23) is fixedly connected to the top of the fixed cylinder (22). Clamping plates (25) are symmetrically provided inside the fixed cylinder (22).

2. A liquid level switch according to claim 1, characterized in that: A sealing ring (3) is fixedly connected inside the protective shell (2).

3. A liquid level switch according to claim 1, characterized in that: A connecting frame (4) is symmetrically fixedly connected to one side of the protective shell (2), and a fixing block (5) is symmetrically fixedly connected to one side of the top of the switch body (1). A sliding groove (6) is provided inside one side of the connecting frame (4), and a telescopic rod (7) is fixedly connected inside one side of the sliding groove (6). A pull plate (8) is fixedly connected to one end of the telescopic rod (7). The pull plate (8) and the sliding groove (6) are slidably connected. A first spring (9) is fixedly connected between one side of the sliding groove (6) and one side of the pull plate (8).

4. A liquid level switch according to claim 3, characterized in that: The pull plate (8) is engaged with the fixing block (5) via the positioning rod (10).

5. A liquid level switch according to claim 1, characterized in that: The first screw (12) has a protrusion (13) fixedly connected to its top. The protrusion (13) and the connecting pipe (11) are connected by a thread. The lower end of the first screw (12) is provided with a groove (14). The protrusion (13) and the groove (14) are connected by a thread.

6. A liquid level switch according to claim 1, characterized in that: The metal sensor (18) is fixedly connected to the high position sensor (16) and the low position sensor (17) respectively by the second spring (19). Warning lights (21) are fixedly connected to the other side of the high position sensor (16) and the low position sensor (17).

7. A liquid level switch according to claim 1, characterized in that: The threaded cylinder (23) and the first screw (12) are connected by a thread.

8. A liquid level switch according to claim 1, characterized in that: The fixed cylinder (22) has a second screw (24) symmetrically threaded on one side inside, and a rotating seat (26) is fixedly connected to one side of the clamping plate (25). The rotating seat (26) and the second screw (24) are rotatably connected.

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