Flange type float switch

Abstract

The invention belongs to the technical field of switches, and particularly relates to a flange type float switch. Comprising a flange upper cover and a flange lower cover, the flange upper cover is connected with the flange lower cover, the flange lower cover is provided with a shell and a shell connecting end, the side wall of the shell is oppositely provided with a liquid outlet and a liquid inlet, the flange upper cover is provided with a signal line leading-out port, the middle position of the flange upper cover is provided with a cavity, and a switch module is installed in the cavity. The switch module and the magnetic steel rod are induced through magnetic steel, and the magnetic steel rod is connected with the floating ball. The device has the beneficial effects that a swing type floating ball mechanism and a flange type dismounting and mounting structure are arranged according to the actual situation of an engineering site; through a simple switch module structure, a reliable floating ball swinging and switch module movement mode is provided.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to a flange type float switch. Background Art

[0002] The existing float switch structure is relatively complex, and often multiple mechanisms cooperate with each other to realize the switching function, which increases the probability of damage to the entire device.

[0003] For example, a pump water level controller disclosed in Chinese patent document application number: 201520408984.7 includes a base and an outer cover. The outer cover cavity is equipped with a switch module and a toggle lever. One end of the toggle lever is hinged in the outer cover. The base is movably connected to a suspension rod. The lower end of the suspension rod is fixedly connected to a float ball. The upper end of the suspension rod can be connected to the toggle lever. The upper end of the suspension rod is fixedly connected to a magnet. The other end of the toggle lever is fixedly connected to a magnet. When the two magnets are positioned correspondingly and the two magnets are attracted, the toggle lever can push the button of the switch module. However, when the water level drops, the two magnets are in an attracted state, and the float ball of the suspension rod cannot smoothly drop with the water level. Therefore, the control is not precise and the operation is not reliable. Summary of the Invention

[0004] The present invention aims to provide a flange-type float switch with a short float stroke and a restricted range of motion, significantly improving the accuracy of the liquid level switch and enabling rapid response to changes in the liquid level within the float, thereby resolving the issue of excessive level switch accuracy in nuclear power plants. Furthermore, the switch incorporates a corresponding switch module for the swinging float structure, resulting in a simple, stable, and reliable switch structure that effectively meets the functional requirements of a liquid level switch.

[0005] The technical solution of the present invention is as follows: a flange-type float switch, comprising a flange upper cover and a flange lower cover, the flange upper cover is connected to the flange lower cover, a shell is installed on the flange lower cover, the shell connection end, the side walls of the shell are oppositely provided with a liquid outlet and a liquid inlet, a signal line outlet is opened on the flange upper cover, a cavity is provided in the middle position of the flange upper cover, a switch module is installed in the cavity, the switch module and the magnetic steel rod are inductively connected by the magnetic steel, and the magnetic steel rod is connected to the float.

[0006] A positioning suspension point is provided on the magnetic steel rod near the floating ball.

[0007] The magnetic steel rod is sleeved with a balancing weight.

[0008] The magnetic steel rod is provided with a pin opening and is fixed on the card slot via a pin.

[0009] The switch module includes a bracket, a left-right symmetrical magnetic block on the port side and a magnetic block on the starboard side, wherein the port-side magnetic block and the starboard magnetic block both include magnetic strips, one end of the bracket is connected to the port-side magnetic block and the mounting plate through a push rod shaft, the mounting plate is connected to a signal terminal through a telescopic rod, and the mounting plate is also connected to a signal lead-out terminal, the other end of the bracket is connected to the starboard magnetic block and the mounting plate through a push rod shaft, the mounting plate is connected to a signal terminal through a telescopic rod, and the mounting plate is also connected to a signal lead-out terminal, and a buckle, a bracket shaft and a pin are installed in the middle position of the bracket.

[0010] A rotating shaft gasket is provided between the bracket and the push rod rotating shaft.

[0011] The flange upper cover and flange lower cover are connected by bolt and nut structure.

[0012] The shell is connected to the end by groove welding.

[0013] The beneficial effects of the present invention are as follows: according to the actual situation of the engineering site, a swinging float mechanism and a flange type disassembly and assembly structure are provided; through a relatively simple switch module structure, reliable float swing and switch module movement are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a flange-type float switch provided by the present invention;

[0015] Figure 2 A cross-sectional view of a flange-type float switch provided by the present invention;

[0016] Figure 3 This is a diagram of the internal structure of a flange-type float switch provided by the present invention;

[0017] Figure 4 Schematic diagram of the switch module;

[0018] Figure 5 This is the switch module structure diagram.

[0019] In the figure: 1 flange upper cover, 2 flange lower cover, 3 housing, 4 groove weld, 5 terminal, 6 signal line lead-out port, 7 liquid outlet, 8 liquid inlet, 9 switch module, 10 sealing gasket, 11 thread seal, 12 limit slot, 13 balancing weight, 14 push rod shaft, 15 bracket shaft, 16 shaft gasket, 17 pin, 18 buckle, 19 telescopic rod, 20 signal terminal, 25 magnetic block on the port side, 26 magnetic block on the starboard side, 27 magnetic strip, 28 signal lead-out terminal, 29 magnetic steel rod, 30 positioning suspension point, 31 float. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The existing method of fixing the flange with bolts makes the float level switch very troublesome during disassembly and maintenance. The application scenarios of the float level switch are often very humid and often rust. In such a case, the disassembly of the float level switch is more troublesome, which is not conducive to the normal maintenance of the float level switch. To this end, the present invention provides a flange float switch to solve the above problems.

[0022] The present invention provides a flange-type float switch with a flange-type disassembly structure for easy installation and maintenance, making it more convenient for on-site use. Furthermore, the switch module is equipped with two magnets for the swinging float structure to cooperate with each other to transmit electrical signals. Compared with traditional float switches, this structure is simpler and more sophisticated.

[0023] like Figure 1 As shown, a flange-type float switch includes a flange upper cover 1 and a flange lower cover 2. The flange upper cover 1 and the flange lower cover 2 are connected by a bolt and nut structure. A cylindrical shell 3 is installed on the flange lower cover 2. The shell 3 is connected to the end 5 by a groove weld 4. The side walls of the shell 3 are oppositely provided with a liquid outlet 7 and a liquid inlet 8. A signal line outlet 6 is opened on the flange upper cover 1, and the signal line is led out from the signal line outlet 6.

[0024] like Figure 2 As shown, there is a cavity in the middle of the flange cover 1, and a switch module 9 is installed in the cavity. Figure 3 As shown, the switch module 9 and the magnetic steel rod 29 are induced by the magnetic steel, the magnetic steel rod 29 is connected to the float 31, a positioning suspension point 30 is provided on the magnetic steel rod 29 near the float 31, a balancing weight 13 is mounted on the magnetic steel rod 29, a pin hole is opened on the magnetic steel rod 29 and is fixed to the slot 12 by a pin, and the switch module 9 is connected to the external circuit control system through a signal line.

[0025] like Figure 4 and 5As shown, the switch module 9 includes a bracket, a left-right symmetrical magnetic block 25 on the port side and a magnetic block 26 on the starboard side, wherein the magnetic block 25 on the port side and the magnetic block 26 on the starboard side each include a magnetic strip 27, a signal lead-out terminal 28, a telescopic rod 19, a signal terminal 20, a push rod shaft 14, a bracket shaft 15, a shaft gasket 16, a pin 17 and a buckle 18. One end of the bracket is connected to the magnetic block 25 on the port side and the mounting plate through the push rod shaft 14, and a shaft gasket is provided between the bracket and the push rod shaft 14. 16, the mounting piece is connected to the signal terminal 20 through the telescopic rod 19, and the mounting piece is also connected to the signal lead-out terminal 28. The other end of the bracket is connected to the starboard side of the magnetic block 26 and the mounting piece through the push rod shaft 14. A shaft gasket 16 is provided between the bracket and the push rod shaft 14. The mounting piece is connected to the signal terminal 20 through the telescopic rod 19, and the mounting piece is also connected to the signal lead-out terminal 28. A buckle 18, a bracket shaft 15 and a pin 17 are installed in the middle position of the bracket.

[0026] The working process of the present invention is as follows:

[0027] The float level control device uses magnetic force, requiring no mechanical connections, for simple and reliable operation. When the measured medium floats, the float moves the main body, while a magnet at the other end of the float controls the magnet on the switch's actuating rod. The float switch is a simple, easy-to-use, safe, and reliable level control device. Compared to conventional mechanical switches, it offers smaller size, faster operation, and a longer lifespan. Compared to electronic switches, it also offers greater resistance to load shocks.

[0028] When the measured medium is gradually added to the interior of the shell 3 from the liquid inlet 8, the float 31 gradually floats up under the action of buoyancy. A high-temperature resistant magnetic steel is welded to the front end of the float 31. When the float 31 swings, the magnetic steel will also swing up and down. The swing position of the float 31 is limited by the magnetic steel mechanism, so that the swing angle of the magnetic steel is also limited. When the front end magnetic steel swings to the specified position, the magnetic steel of the float swing mechanism and the switch magnetic steel in the junction box generate a repulsive force, causing the switch magnetic steel in the junction box to move, and the front end contact connected to the magnetic steel is closed, the circuit is connected, and an electrical signal is transmitted. When the liquid in the float decreases, the float swings in the opposite direction, causing the magnetic steel at the other end of the switch to move, and the switch is switched.

Claims

1. A flange type float switch, characterized by: It includes a flange upper cover and a flange lower cover, the flange upper cover is connected to the flange lower cover, a shell is installed on the flange lower cover, the shell connection end, the side walls of the shell are oppositely provided with a liquid outlet and a liquid inlet, a signal line outlet is opened on the flange upper cover, a cavity is provided in the middle position of the flange upper cover, a switch module is installed in the cavity, the switch module and the magnetic steel rod are inductively connected by the magnetic steel, and the magnetic steel rod is connected to the float.

2. A flange type float switch according to claim 1, characterized in that: A positioning suspension point is provided on the magnetic steel rod near the floating ball.

3. The flange-type float switch according to claim 1, characterized in that: The magnetic steel rod is sleeved with a balancing weight.

4. The flange-type float switch according to claim 1, characterized in that: The magnetic steel rod is provided with a pin opening and is fixed on the card slot via a pin.

5. The flange type float switch according to claim 1, characterized in that: The switch module includes a bracket, a left-right symmetrical magnetic block and a right-left magnetic block, wherein the left-right magnetic block and the right-left magnetic block both include magnetic strips, one end of the bracket is connected to the port side of the magnetic block and the mounting plate through a push rod shaft, the mounting plate is connected to a signal terminal through a telescopic rod, and the mounting plate is also connected to a signal lead-out terminal, the other end of the bracket is connected to the starboard side of the magnetic block and the mounting plate through a push rod shaft, the mounting plate is connected to a signal terminal through a telescopic rod, and the mounting plate is also connected to a signal lead-out terminal, and a buckle, a bracket shaft and a pin are installed in the middle position of the bracket.

6. A flange type float switch according to claim 5, characterized in that: A rotating shaft gasket is provided between the bracket and the push rod rotating shaft.

7. The flange type float switch according to claim 1, characterized in that: The flange upper cover and the flange lower cover are connected by a bolt and nut structure.

8. The flange type float switch according to claim 1, characterized in that: The shell is connected to the end by groove welding.

Images