A cable float level switch

Abstract

The utility model discloses a cable float ball liquid level switch, including the shell, the inside of shell is equipped with trigger subassembly, and through the shell cover will trigger subassembly seal in the shell, trigger subassembly includes support, still be equipped with trigger block on support, trigger block one end with the rotatory connection of the axle pin seat that is equipped with on support, still be equipped with mounting plate below support, and install the microswitch on mounting plate, the contact of microswitch faces trigger block, when shell is in the process of drooping, trigger block rotates on axle pin seat, to make trigger block extrude the contact of microswitch, realize the opening of microswitch. Therefore compared with prior art the structure of the equipment is novel, and as long as trigger block can rotate can complete the trigger of microswitch, compared with prior art need not set up the track for guiding the steel ball movement in the shell inside, can also simplify the processing technology of shell to reduce the production cost of equipment.

Description

Technical Field

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

[0002] As a conventional device for liquid level detection, the cable float level switch is designed based on the principles of gravity and buoyancy. It mainly consists of a float box, a counterweight, and a control cable. Its working principle is as follows: due to buoyancy, the float box rises or sinks with the counterweight as its origin, depending on the liquid level in the pump pool. When the line connecting the float box and the counterweight reaches a certain angle with the horizontal plane, the float inside the box rolls and contacts or moves away from a micro-switch, thus switching the micro-switch on and off. When the liquid level in the pump pool is high, the micro-switch is on, outputting an ON signal; when the liquid level is low, the micro-switch is off, outputting an OFF signal. The on / off signal is transmitted to the control unit via the control cable, thereby controlling the start and stop of the sand pump, achieving automatic liquid level control. However, existing float level switches, such as the technology in publication number CN102074413B, mostly use a steel ball to trigger the micro-switch. This structural limitation requires pre-designing the movement trajectory of the steel ball; if the steel ball does not move according to the trajectory, the level switch will malfunction. Utility Model Content

[0003] The purpose of this invention is to provide a cable float level switch to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cable float level switch, comprising a housing, wherein a triggering component is provided inside the housing and the triggering component is sealed inside the housing by a housing cover; the triggering component includes a bracket, and a trigger block is provided on the bracket, one end of the trigger block being rotatably connected to a shaft pin seat provided on the bracket; a mounting plate is provided below the bracket, and a micro switch is mounted on the mounting plate, the contacts of the micro switch facing the trigger block; when the housing is drooping, the trigger block rotates on the shaft pin seat, causing the trigger block to press the contacts of the micro switch, thereby opening the micro switch.

[0005] As a preferred technical solution of this utility model: the end of the outer shell away from the shell cover is also provided with an external threaded post, and is connected to the external threaded post by a nut to fix the wire on the outer shell.

[0006] As a preferred technical solution of this utility model: the inner wall surface of the housing is further provided with a first mounting seat, and a fastener is used to pass through the bracket and connect to the first mounting seat to fix the trigger component inside the housing.

[0007] As a preferred technical solution of this utility model: one end of the trigger block is also provided with a shaft pin hole, and the provided pin shaft passes through the shaft pin hole and the shaft pin seat to realize the rotation of one end of the trigger block on the shaft pin seat.

[0008] As a preferred technical solution of this utility model: the trigger block is provided with a counterweight at one end away from the shaft pin hole, and the counterweight is used to guide the trigger block to trigger the micro switch.

[0009] As a preferred technical solution of this utility model: a sealing member is also provided inside the housing. One side of the sealing member is connected to the housing to prevent external water from entering the housing. The other side of the sealing member is located above the trigger block to prevent the trigger block from rotating away from the micro switch.

[0010] As a preferred technical solution of this utility model: the cross-section of the sealing member is trapezoidal, and the side of the sealing member is also provided with a wire groove.

[0011] As a preferred technical solution of this utility model: the upper end face of the sealing member is provided with a protrusion and a recess, and a sealing strip is provided on one side of the recess; when the sealing member is connected to the second mounting base, the protrusion and the sealing strip are used to lock the second mounting base to prevent water from entering the housing through the cable groove.

[0012] The beneficial effects of this utility model by adopting the above technical solution are as follows: Since the triggering component of the device uses a trigger block to rotate on the support to trigger the micro switch, the structure of the device is more novel compared with the prior art. Since the trigger block can only rotate on the support, the trigger block can accurately trigger the micro switch after the water level drops, so as to avoid the device from malfunctioning. At the same time, as long as the trigger block can rotate, the micro switch can be triggered. Therefore, compared with the prior art, it is not necessary to set a track inside the shell to guide the movement of the steel ball, and the processing technology of the shell can be simplified, thereby reducing the production cost of the device. Attached Figure Description

[0013] Figure 1 This is an exploded view of the main structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the main structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the outer shell of this utility model; Figure 4 This is an exploded structural diagram of the outer shell, triggering component, and sealing component of this utility model; Figure 5 This is a schematic diagram of the main structure of the trigger component of this utility model; Figure 6 This is an exploded structural diagram of the trigger component of this utility model; Figure 7 This is a schematic diagram of the main structure of the bracket of this utility model; Figure 8 This is a schematic diagram of the main structure of the sealing component of this utility model; Figure 9 This is a schematic diagram of the main structure of the trigger block of this utility model.

[0014] In the diagram: 1. Housing; 2. Nut; 3. Trigger assembly; 30. Bracket; 31. Shaft pin seat; 32. Trigger block; 33. Micro switch; 34. Pin; 35. Mounting plate; 36. Shaft pin hole; 37. Counterweight; 4. Housing cover; 5. Sealing component; 50. Protrusion; 51. Recess; 52. Sealing strip; 53. Through hole; 54. Wire groove; 6. First mounting base; 7. Second mounting base; 8. External threaded post. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0016] Please see Figure 1-9 This utility model provides an embodiment of a cable float level switch, comprising a housing 1, wherein a trigger assembly 3 is provided inside the housing 1 and is sealed inside the housing 1 by a housing cover 4; the trigger assembly 3 includes a bracket 30, and a trigger block 32 is provided on the bracket 30, one end of the trigger block 32 being rotatably connected to a shaft pin seat 31 provided on the bracket 30; a mounting plate 35 is provided below the bracket 30, and a micro switch 33 is mounted on the mounting plate 35, with the contacts of the micro switch 33 facing the trigger block 32; when the housing 1 is drooping, the trigger block 32 rotates on the shaft pin seat 31, causing the trigger block 32 to press the contacts of the micro switch 33, thereby opening the micro switch 33.

[0017] In summary, since the triggering component 3 of this device utilizes the rotation of the trigger block 32 on the bracket 30 to trigger the micro switch 33, the structure of this device is more novel compared to the prior art. Furthermore, since the trigger block 32 can only rotate on the bracket 30, it can accurately trigger the micro switch 33 after the water level drops, thus preventing the device from malfunctioning. Moreover, as long as the trigger block 32 can rotate, the micro switch 33 can be triggered. Therefore, compared to the prior art, it is not necessary to set a track inside the outer casing 1 to guide the movement of the steel ball, which simplifies the processing technology of the outer casing 1 and reduces the production cost of the device.

[0018] Furthermore, since the outer shell 1 is provided with an external threaded post 8 at the end away from the shell cover 4, and is connected to the external threaded post 8 by a nut 2 to fix the wire on the outer shell 1, the wire can be fixed on the outer shell 1 by tightening the nut 2. The specific fixing and sealing method can be completely referred to the existing technology.

[0019] To facilitate external assembly of the trigger component 3, a first mounting base 6 is provided on the inner wall of the outer casing 1. Fasteners pass through the bracket 30 and connect to the first mounting base 6 to fix the trigger component 3 inside the outer casing 1. Therefore, by using fasteners such as bolts to connect to the first mounting base 6, the trigger component 3 can be fixed inside the outer casing 1. Conversely, removing the bolts makes the assembly and disassembly of the trigger component 3 simple and convenient. This solves the problem of needing to be careful of steel balls falling out during the opening of existing equipment casings.

[0020] Furthermore, one end of the trigger block 32 is provided with a pin hole 36. After the provided pin 34 passes through the pin hole 36 and the pin seat 31, the one end of the trigger block 32 can rotate on the pin seat 31.

[0021] In summary, the above solution ensures the normal rotation of the trigger block 32 while facilitating the assembly of the trigger block 32 and the bracket 30. Therefore, the entire trigger assembly 3 can be easily and conveniently replaced.

[0022] In addition, since the trigger block 32 is provided with a counterweight 37 at the end away from the shaft pin hole 36, the counterweight 37 guides the trigger block 32 to trigger the micro switch 33. Therefore, the counterweight 37 can be used to ensure that after the water level drops, the trigger block 32 can only rotate in one direction, that is, in the direction of triggering the micro switch 33, so as to ensure that the micro switch 33 is reliably triggered.

[0023] Based on the above solution, since a sealing member 5 is also provided inside the outer casing 1, one side of the sealing member 5 is connected to the outer casing 1 to prevent external water from entering the outer casing 1, and the other side of the sealing member 5 is located above the trigger block 32 to prevent the trigger block 32 from rotating away from the micro switch 33. Therefore, the problem of water entering and damaging the electrical components inside the outer casing 1 can be reduced.

[0024] Specifically, the sealing member 5 has a trapezoidal cross-section, which allows it to adapt to the structure of the top of the housing 1 and increases the contact area between the sealing member 5 and the housing 1. Additionally, the sealing member 5 has a wire channel 54 on its side, facilitating the connection of wires to electrical equipment inside the housing 1, such as a microswitch 33.

[0025] Furthermore, the upper end face of the sealing member 5 is provided with a protrusion 50 and a recess 51, and a sealing strip 52 is provided on one side of the recess 51. When the sealing member 5 is connected to the second mounting base 7, the protrusion 50 and the sealing strip 52 are used to lock onto the outside of the second mounting base 7 to prevent water from entering the outer casing 1 through the cable groove 54. Bolts or other fasteners are used to pass through the through hole 53 on the sealing member 5 and connect to the second mounting base 7 to fix one end of the sealing member 5 onto the second mounting base 7. Therefore, when the recess 51 is attached to the second mounting base 7, the protrusion 50 and the sealing strip 52 can be locked onto both sides of the second mounting base 7 to improve the sealing performance between the sealing member 5 and the second mounting base 7.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A cable float level switch, characterized in that: Includes a housing (1), inside which a trigger assembly (3) is provided, and the trigger assembly (3) is sealed inside the housing (1) by a housing cover (4); The triggering component (3) includes a bracket (30) and a trigger block (32) is provided on the bracket (30). One end of the trigger block (32) is rotatably connected to a shaft pin seat (31) provided on the bracket (30). Below the bracket (30) is a mounting plate (35), and a micro switch (33) is mounted on the mounting plate (35), with the contacts of the micro switch (33) facing the trigger block (32). As the outer casing (1) droops, the trigger block (32) rotates on the shaft pin seat (31) to cause the trigger block (32) to press the contact of the micro switch (33) to open the micro switch (33).

2. The cable float level switch according to claim 1, characterized in that: The outer casing (1) is provided with an external threaded post (8) at one end away from the cover (4), and is connected to the external threaded post (8) by a nut (2) to fix the wire on the outer casing (1).

3. A cable float level switch according to claim 2, characterized in that: The inner wall of the housing (1) is also provided with a first mounting seat (6), which is connected to the first mounting seat (6) by fasteners passing through the bracket (30) to fix the trigger component (3) inside the housing (1).

4. A cable float level switch according to claim 3, characterized in that: One end of the trigger block (32) is also provided with a pin hole (36). After the provided pin (34) passes through the pin hole (36) and the pin seat (31), the one end of the trigger block (32) can rotate on the pin seat (31).

5. A cable float level switch according to claim 4, characterized in that: The trigger block (32) has a counterweight (37) at one end away from the shaft pin hole (36), and the counterweight (37) guides the trigger block (32) to trigger the micro switch (33).

6. A cable float level switch according to any one of claims 1-5, characterized in that: The housing (1) is also provided with a sealing member (5). One side of the sealing member (5) is connected to the housing (1) to prevent external water from entering the housing (1). The other side of the sealing member (5) is located above the trigger block (32) to prevent the trigger block (32) from rotating away from the micro switch (33).

7. A cable float level switch according to claim 6, characterized in that: The sealing component (5) has a trapezoidal cross-section, and the sealing component (5) also has a wire groove (54) on its side.

8. A cable float level switch according to claim 7, characterized in that: The upper end face of the sealing member (5) is provided with a protrusion (50) and a recess (51), and a sealing strip (52) is provided on one side of the recess (51); when the sealing member (5) is connected to the provided second mounting seat (7), the protrusion (50) and the sealing strip (52) are used to lock the second mounting seat (7) to prevent water from entering the outer shell (1) through the wire groove (54).

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