Side-mounted floating ball liquid level switch for outputting signal DPDT

Abstract

The utility model relates to the technical field of floating ball liquid level switches, in particular to a side-mounted floating ball liquid level switch for outputting a signal DPDT, which comprises a junction box assembly, a flange assembly is arranged on one side of the junction box assembly, the junction box assembly and the flange assembly are assembled through a fastener, and an inner cavity of the junction box assembly is used for mounting a switch assembly. A floating ball assembly is installed at one end of the flange assembly, and the floating ball assembly and the flange assembly are fixed through a fulcrum shaft assembly. End magnetic steel of a floating ball assembly on the floating ball liquid level switch is samarium cobalt magnetic steel, and a movable cavity of the magnetic steel is processed into a cylindrical shape with a spherical bottom, so that the movable cavity can freely move in a limited range, and the intensity and the action range of a magnetic field can be conveniently increased; the limiting block is spot-welded on the inner wall of the mounting cavity of the switch assembly for the floating ball liquid level switch and used for limiting the switch assembly and preventing the switch assembly from rotating in the inner cavity to influence the action reliability and consistency, and the self-checking handle is matched, so that daily maintenance and overhaul of the switch are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of float liquid level switches, in particular to a side-mounted float liquid level switch with a DPDT output signal. Background Art

[0002] The side-mounted float level switch consists of a float assembly, a flange assembly, a switch assembly and other accessories. Its basic principle is: when the liquid level at the float switch position changes, the float floating on the liquid level or interface swings within a certain stroke, and the magnet at the end of the float assembly repels the magnet swing of the switch assembly, driving the micro switch to operate, thereby changing the state of the micro switch.

[0003] This type of side-mounted float level switch usually has a large hysteresis. For some occasions that require small hysteresis control, such as equipment with stirring, the level switch needs to be installed in the side outlet pipe, which may not work reliably. On the other hand, because its output contacts are usually SPDT single-pole double-throw, for some occasions that require redundant design, or when the liquid level alarm signal needs to be connected to different systems for processing, one product cannot meet the requirements and two products need to be installed, which increases the manufacturing cost and complexity of the equipment.

[0004] With the development of equipment intensification and miniaturization, the above-mentioned demand is becoming more and more prominent, and a side-mounted float liquid level switch with DPDT output signal is needed to solve this problem. Utility Model Content

[0005] The utility model aims to provide a side-mounted float liquid level switch with a DPDT output signal to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a side-mounted float liquid level switch with an output signal DPDT, comprising a junction box assembly, a flange assembly being provided on one side of the junction box assembly, the junction box assembly and the flange assembly being assembled by fasteners, the inner cavity of the junction box assembly being used for installing a switch assembly, a float assembly being installed at one end of the switch assembly, and the float assembly and the flange assembly being fixed by a support shaft assembly.

[0007] As a preferred technical solution of the utility model, a terminal board is installed on the switch assembly, and the terminal board is used to fix the wiring terminals. One end of the terminal board is connected to a connecting wire, and the other end of the connecting wire is connected to a reed switch. The reed switch and the connecting wire are bonded by sealant, and the reed switch is located in a reed switch mounting seat.

[0008] As an optimal technical solution of the utility model, a first cavity head is installed on the upper side end of the connecting flange, and a second cavity head is installed on the top end. The second cavity head is located on the self-inspection cavity tube, and a connecting flange is installed on the end of the self-inspection cavity tube away from the first cavity head.

[0009] As a preferred technical solution of the utility model, a limiting block is installed in the flange assembly, a support bar is installed in the flange assembly, a support shaft is installed on the support bar, and a retaining ring is installed on the support shaft.

[0010] As a preferred technical solution of the present utility model, screws are installed between the switch assembly and the flange assembly for installing the switch assembly in the cavity of the flange assembly.

[0011] As a preferred technical solution of the utility model, the installation position of the reed switch is 13 mm above and below the center of the reed switch mounting seat, and the left and right spacing is 8 mm.

[0012] As a preferred technical solution of the utility model, the reed switch mounting seat is made of PTFE polytetrafluoroethylene material, and the sealant is 704 soft silicone.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The utility model is a side-mounted float liquid level switch with a DPDT output signal. The device sets a reed switch in a reed switch mounting seat and seals it by filling inert gas to ensure the sealing effect. The end magnet of the float assembly on the float liquid level switch is a samarium cobalt magnet. The movable cavity of the magnet is processed into a cylindrical shape with a spherical bottom to ensure that it can move freely within a limited range, so as to increase the strength and range of action of the magnetic field. A limit block is spot-welded on the inner wall of the mounting cavity of the switch assembly for the float liquid level switch to limit the switch assembly to prevent it from affecting the reliability and consistency of the action after rotating in the inner cavity. With the self-checking handle, it is convenient for daily maintenance and repair of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of a side-mounted float liquid level switch with an output signal DPDT according to an embodiment of the utility model;

[0017] Figure 2It is a schematic diagram of the switch assembly structure of a side-mounted float liquid level switch with an output signal DPDT according to an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of a flange assembly of a side-mounted float liquid level switch with an output signal DPDT according to an embodiment of the utility model;

[0019] Figure 4 The present invention is a schematic diagram of the support bar position structure of a side-mounted float liquid level switch that outputs a DPDT signal according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] 1. Junction box assembly; 2. Switch assembly; 3. Fasteners; 4. Flange assembly; 5. Screws; 6. Self-test assembly; 7. Float assembly; 8. Support shaft assembly; 9. Terminal board; 10. Reed switch mounting seat; 11. Connecting wires; 12. Reed switch; 13. Sealant; 14. Wiring terminal; 15. First cavity head; 16. Second cavity head; 17. Self-test cavity tube; 18. Connecting flange; 19. Limit block; 20. Support bar; 21. Support shaft; 22. Retaining ring. DETAILED DESCRIPTION

[0022] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described: Example

[0023] See also Figure 1 to Figure 2 Embodiment 1 is described, including a junction box assembly 1, a flange assembly 4 is provided on one side of the junction box assembly 1, the junction box assembly 1 and the flange assembly 4 are assembled by fasteners 3, the inner cavity of the junction box assembly 1 is used to install the switch assembly 2, a float assembly 7 is installed at one end of the switch assembly 2, the float assembly 7 and the flange assembly 4 are fixed by a support shaft assembly 8, a terminal board 9 is installed on the switch assembly 2, the terminal board 9 is used to fix the installation terminal 14, one end of the terminal board 9 is connected to a connecting wire 11, the other end of the connecting wire 11 is connected to a reed switch 12, the reed switch 12 and the connecting wire 11 are bonded by a sealant 13, the reed switch 12 is located in the reed switch mounting seat 10, a screw 5 is installed between the switch assembly 2 and the flange assembly 4, and is used to install the switch assembly 2 in the cavity of the flange assembly 4, the installation position of the reed switch 12 is 13 mm above and below the center of the reed switch mounting seat 10, and the left and right spacing is 8 mm;

[0024] In this embodiment, the magnetic handle of the float assembly 7 is connected to the support bar of the flange assembly at a position where the gap between the rotating support shaft and the magnetic handle and the support bar can be reduced to reduce the swing space of the magnetic handle. Example

[0025] See also Figure 3 to Figure 4Example 2 is described. This embodiment further describes Example 1, including a connecting flange 18, a first cavity head 15 is installed on the upper side of the connecting flange 18, a second cavity head 16 is installed on the top, the second cavity head 16 is located on the self-inspection cavity tube 17, and a connecting flange 18 is installed on the end of the self-inspection cavity tube 17 away from the first cavity head 15, a limited block 19 is installed in the flange assembly 4, a support bar 20 is installed in the flange assembly 4, a support shaft 21 is installed on the support bar 20, a retaining ring 22 is installed on the support shaft 21, a reed switch mounting seat 10 is made of PTFE polytetrafluoroethylene material, and the sealant 13 is 704 soft silicone.

[0026] In this embodiment, the connecting flange 18 is provided according to the standards and size specifications required by the user and is used to connect to the equipment. After the flange assembly 4 is welded, a water pressure test is performed at the maximum working pressure or 1.5 times the nominal pressure of the flange.

[0027] In specific applications, the junction box assembly 1 provided in the device is respectively composed of a shell, a shell cover, a cable gland, a hanging chain, and an O-ring, and provides external wire connection. When the flange assembly 4 is assembled through the fastener 3, the inner cavity is used to install the switch assembly 2, wherein the inner wall of the installation cavity of the switch assembly 2 for the float liquid level switch is spot-welded with a limit block 19, which is used to limit the switch assembly 2 to prevent it from affecting the reliability and consistency of the action after rotating in the inner cavity. The self-test assembly 6 is respectively composed of a handle, a valve stem, and a sealing ring. After the assembly is completed, it can rotate flexibly and can withstand a water pressure test of 1.5 times the maximum working pressure or the nominal pressure of the flange, so as to facilitate the water pressure test. The float assembly 7 is respectively composed of a magnetic steel, a magnetic handle, a ball rod, and a float, and is fixed to the flange assembly 4 through a support shaft assembly 8. When the float swings up and down within a certain stroke as the liquid level changes, when the magnetic handle of the float assembly 7 is in the connection position with the support bar of the flange assembly, the gap between the rotating support shaft and the magnetic handle and the support bar can be reduced to reduce the swing space of the magnetic handle.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A side-mounted float liquid level switch with an output signal DPDT, characterized in that: The invention comprises a junction box assembly (1), wherein a flange assembly (4) is provided on one side of the junction box assembly (1), the junction box assembly (1) and the flange assembly (4) are assembled by means of a fastener (3), the inner cavity of the junction box assembly (1) is used for installing a switch assembly (2), a float assembly (7) is installed on one end of the switch assembly (2), and the float assembly (7) and the flange assembly (4) are fixed by means of a support shaft assembly (8).

2. A side-mounted float liquid level switch with an output signal DPDT according to claim 1, characterized in that: A terminal board (9) is installed on the switch assembly (2), and the terminal board (9) is used to fix the wiring terminal (14). One end of the terminal board (9) is connected to a connecting wire (11), and the other end of the connecting wire (11) is connected to a reed switch (12). The reed switch (12) and the connecting wire (11) are bonded by a sealant (13), and the reed switch (12) is located in a reed switch mounting seat (10).

3. A side-mounted float liquid level switch with an output signal DPDT according to claim 1, characterized in that: A first cavity cover (15) is installed on the upper side end of the connecting flange (18), and a second cavity cover (16) is installed on the top end; the second cavity cover (16) is located on the self-inspection cavity tube (17); and a connecting flange (18) is installed on the end of the self-inspection cavity tube (17) away from the first cavity cover (15).

4. A side-mounted float liquid level switch with a DPDT output signal according to claim 3, characterized in that: A limit block (19) is installed in the flange assembly (4), a support bar (20) is installed in the flange assembly (4), a support shaft (21) is installed on the support bar (20), and a retaining ring (22) is installed on the support shaft (21).

5. A side-mounted float liquid level switch with a DPDT output signal according to claim 1, characterized in that: A screw (5) is installed between the switch assembly (2) and the flange assembly (4) and is used to install the switch assembly (2) in the cavity of the flange assembly (4).

6. A side-mounted float liquid level switch with a DPDT output signal according to claim 2, characterized in that: The installation position of the reed switch (12) is 13 mm above and below the center of the reed switch mounting seat (10), and the left-right spacing is 8 mm.

7. A side-mounted float liquid level switch with a DPDT output signal according to claim 6, characterized in that: The reed switch mounting seat (10) is made of PTFE polytetrafluoroethylene material, and the sealant (13) is made of 704 soft silicone.

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