A new type of reed switch liquid level gauge

Abstract

The utility model discloses a novel reed switch liquid level gauge, comprising: a shell, a reed switch and a float, the shell comprising a tube body and a tubular bracket, the tube body is located above the tubular bracket, the reed switch is located inside the tube body, the tubular bracket is provided with a plurality of limit posts, the top ends of the plurality of limit posts are fixed to the bottom of the tube body, the ends of the limit posts are provided with positioning parts, the float is located inside the tubular bracket and can move up and down along the tube body, a magnetic structure is provided at the top end of the float, different from the previous reed switch liquid level gauge in which the float is placed outside the reed switch shell, the novel reed switch liquid level gauge proposed in the present application places the float at the bottom of the reed switch, so the outer diameter of the float is much smaller than the outer diameter of the common annular liquid level gauge, and the overall size of the entire liquid level gauge will also be reduced, and the movement of the float is limited and protected by the tubular bracket, and will not fail due to the influence of hair or other fiber impurities in the detected liquid.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry reed switch liquid level gauges, in particular to a novel dry reed switch liquid level gauge. Background Art

[0002] The reed switch float level gauge is a new type of level gauge that uses the magnetic principle to measure the liquid level. Compared with the traditional float level gauge, the reed switch float level gauge has higher accuracy, more reliable stability and longer service life. The existing reed switch float level gauge has two key parts: the reed switch and the float. The reed switch is the core component of the level gauge. It uses the magnetic principle to detect the liquid level. The float is used to detect the change of the liquid level. There is a magnet inside the float. When the float is affected by the change of the liquid level, the magnetic field of the magnet inside the float will also change. The reed switch changes according to the change of the float. The size of the magnetic field change is used to determine the liquid level. The float in the prior art is generally an annular structure and is sleeved on the outside of the reed switch. The outer diameter of the float is much larger than the size of the plastic or metal shell where the reed switch is located. When the reserved space for installation is insufficient, this structure will cause inconvenience to the installation. More importantly, the exposed float is easily affected by external physical interference, especially when there are hair or other fiber impurities in the detected liquid, which can hinder the free movement of the float, making the movement of the float hindered and unable to work normally, resulting in the failure of the liquid level meter function. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a new type of reed switch liquid level gauge, which effectively avoids the movement of the float in the measured liquid from being blocked by changing the shape and installation method of the float, and greatly reduces the overall outer diameter of the liquid level gauge in structure.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a new type of reed switch liquid level gauge, comprising: a shell, a reed switch and a float, the shell comprising a tube body and a tubular bracket, the tube body is located above the tubular bracket, the reed switch is located inside the tube body, the tubular bracket has a plurality of limit columns, the top ends of the plurality of limit columns are fixed to the bottom of the tube body, a positioning portion is provided at the end of the limit column, the float is located inside the tubular bracket and can move up and down along the tube body, and a magnetic structure is provided at the top of the float.

[0005] Compared with the prior art, the beneficial effect of the utility model is that unlike the previous reed switch liquid level gauge which places the float outside the reed switch housing, the new reed switch liquid level gauge proposed in the present application places the float at the lower part of the reed switch, so the outer diameter of the float is much smaller than the outer diameter of the common annular liquid level gauge. At the same time, the overall size of the entire liquid level gauge will also be reduced, and the movement of the float is restricted and protected by the tubular bracket, and will not fail due to the presence of hair or other fiber impurities in the detected liquid.

[0006] In the above-mentioned reed switch liquid level gauge, the plurality of limit posts are made of plastic material.

[0007] In the above-mentioned reed switch liquid level gauge, the positioning portion adopts a barb design.

[0008] The above-mentioned reed switch liquid level gauge has pins on the reed switch, and the pins are connected to the wires.

[0009] In the above-mentioned reed switch liquid level gauge, the tube body is provided with an open end, the reed switch is placed in the tube body through the open end, and the open end and the wire are sealed with sealant.

[0010] In the above-mentioned reed switch liquid level gauge, a positioning hole is provided in the center of the float, and the magnetic structure is embedded in the positioning hole, and the magnetic structure is a magnet.

[0011] In the above-mentioned reed switch liquid level gauge, the tube body is a round tube, the axis of the tube body coincides with the axis of the tubular support, and the outer diameter of the tube body is the same as the outer diameter of the tubular support.

[0012] In the above-mentioned reed switch liquid level gauge, the float is made of foam float material.

[0013] In the above-mentioned reed switch liquid level gauge, the tube body and the tubular bracket are integrally formed.

[0014] In the above-mentioned reed switch liquid level gauge, sealant is filled between the reed switch and the tube body to fix the reed switch, and the sealant is made of epoxy resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 A cross-sectional view of a reed switch liquid level gauge according to an embodiment of the utility model;

[0017] Figure 3 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 2 ;

[0018] Figure 4 A top view of the reed switch liquid level gauge structure of an embodiment of the utility model;

[0019] Figure 5 It is a structural schematic diagram of a float in a reed switch liquid level gauge structure according to an embodiment of the utility model;

[0020] Description of the accompanying drawings: 100 housing, 110 tube body, 111 opening end, 120 tubular bracket, 121 limiting column, 122 positioning portion, 123 gap groove, 200 reed switch, 210 pin, 300 float, 310 magnetic structure, 320 positioning hole, 400 wire. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below. Figures 1 to 5 The embodiment of the utility model provides a new type of reed switch liquid level gauge, including: a housing 100, a reed switch 200 and a float 300, the housing 100 includes a tube body 110 and a tubular support 120, the tube body 110 is located above the tubular support 120, the reed switch 200 is located inside the tube body 110, the tubular support 120 has a plurality of limit columns 121, the top ends of the plurality of limit columns 121 are fixed to the bottom of the tube body 110, the ends of the limit columns 121 are provided with a positioning portion 122, the float 300 is located inside the tubular support 120 and can be moved along the tube body 1 10 moves up and down, and a magnetic structure 310 is provided on the top of the float 300. Different from the previous reed switch liquid level gauge in which the float ball is placed outside the shell of the reed switch 200, the novel reed switch liquid level gauge proposed in the present application arranges the float 300 at the lower part of the reed switch 200. Therefore, the outer diameter of the float 300 is much smaller than that of the common annular liquid level gauge. At the same time, the outer size of the entire liquid level gauge will also be reduced, and the movement of the float 300 is restricted and protected by the tubular bracket 120, and will not fail due to the influence of hair or other fiber impurities in the detected liquid.

[0022] Further, refer to Figure 2The housing 100 is a carrier of the reed switch 200. The housing 100 includes a tube body 110 and a tubular support 120. The reed switch 200 is placed inside the tube body 110. The tubular support 120 is used to place the float 300. The bottom of the tube body 110 adopts a closed structure. The tubular support 120 is connected to the bottom of the tube body 110. Of course, the utility model does not limit the specific structure of the tube body 110. Preferably, the tube body 110 is a round tube. The tube body 110 is a round tube. The axis of the tube body 110 is aligned with the axis of the tubular support 120. The outer diameter of the tube body 110 and the tubular support 120 coincide with each other, that is, the outer diameter of the tube body 110 is the size of the entire reed switch liquid level gauge. Of course, the tube body 110 can also be square. Of course, the utility model does not limit the specific connection method between the tube body 110 and the tubular support 120. Preferably, the tube body 110 and the tubular support 120 are integrally formed. Of course, the tube body 110 and the tubular support 120 can also be movably connected, such as the tubular support 120 is clamped on one end of the tube body 110.

[0023] Further, refer to Figure 1 and Figure 2 The tubular support 120 has a plurality of limiting columns 121, one end of each of which is fixed to the bottom of the tube body 110, and the limiting columns 121 are used to fix the moving direction of the float 300, and the limiting columns 121 can enable the entire tubular support 120 to be opened, so that the float 300 can be smoothly put in and taken out of the tubular support 120 under the action of an external force. Furthermore, the limiting columns 121 limit the lateral displacement of the float 300, and the float 300 moves directionally toward or away from the reed switch 200 under the action of the limiting columns 121. Furthermore, referring to Figure 3 and Figure 4 There is a gap groove 123 between the float 300 and the plurality of limit columns 121. The gap groove 123 allows the detected liquid to completely enter the tubular support 120, providing buoyancy for the float 300 so that the float 300 can move up and down. Furthermore, a positioning portion 122 is provided at the end of the limit column 121. The positioning portion 122 is used to prevent the float 300 from being separated from the tubular support 120. When using a reed switch liquid level meter, the float 300 is inserted into the tubular support 120 from the end of the limit column 121 by external force, and the reed switch liquid The level meter is put into the liquid to be tested, and the wire 400 connected to the reed switch 200 is connected to the external power supply. Under the action of the external power supply and the buoyancy of the liquid to be tested, the float 300 moves up and down in the tubular support 120. In order to make the float 300 float in the liquid to be tested, the float 300 is made of foam float material. Of course, the utility model does not limit the specific type of foam float material. As the float 300 moves, when the float 300 floats to the bottom of the tube body 110, that is, close to the position of the reed switch 200, further, referring to Figure 5A positioning hole 320 is provided in the center of the float 300, and a magnetic structure 310 is embedded in the positioning hole 320. The magnetic structure 310 is a magnet. The reed switch 200 is driven by the magnetic field of the magnetic structure 310 on the float 300, and the reed switch 200 is closed. When the float 300 moves downward, that is, falls to the positioning portion 122, the reed switch 200 is disconnected due to the weakening of the magnetic field inside the float 300, thereby completing the sensing and detection work of the liquid level meter.

[0024] Furthermore, in order to smoothly insert the float 300 into the tubular support 120 by external force, the plurality of limit posts 121 are made of plastic material. Of course, the present invention does not limit the specific type of plastic material. In order to fix the float 300 in the tubular support 120, a positioning portion 122 is provided at the end of the limit post 121. The positioning portion 122 is used to prevent the float 300 from falling from the tubular support 120. Of course, the present invention does not limit the specific structure of the positioning portion 122. Preferably, the positioning portion 122 adopts a barb design. The barb design of the positioning portion 122 can expand the opening range of one end of the tubular bracket 120 of the float 300, which is conducive to inserting the float 300 into the tubular bracket 120 through external force. The limiting column 121 and the positioning portion 122 form an open cage structure, and the float 300 is placed in this cage structure. The size of the float 300 is smaller than the internal size of the cage structure, so the float 300 can move up and down under the action of buoyancy.

[0025] Furthermore, an open end 111 is provided on the tube body 110, and the reed switch 200 is placed in the tube body 110 through the open end 111. The open end 111 and the wire 400 are sealed with sealant. Of course, the utility model does not limit the specific structure of the open end 111. Preferably, a connecting nut is provided on the open end 111 so that the entire tube body 110 can be connected to the components to be installed. Furthermore, a pin 210 is provided on the reed switch 200, and the pin 210 is connected to the wire 400. Of course, the utility model does not limit the specific connection method between the pin 210 and the wire 400. Preferably, the pin 210 and the wire 400 are connected by welding. Further, in order to insulate the inside of the tube body 110 from the entire outside world and prevent the reed switch 200 from being corroded, sealant is filled between the reed switch 200 and the tube body 110. Of course, the utility model does not limit the specific type of sealant. Preferably, the sealant is made of epoxy resin.

[0026] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, the meaning of "several" is one or more of a new type of reed switch liquid level gauge, the meaning of "more" is two or more, "greater than", "less than", "exceed" etc. are understood as not including the number, and "above", "below", "within" etc. are understood as including the number. If there is a description of the first type of reed switch liquid level gauge or the second type, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A new type of reed switch liquid level gauge, characterized in that: include: A housing (100), a reed switch (200) and a float (300), wherein the housing (100) comprises a tube body (110) and a tubular support (120), wherein the tube body (110) is located above the tubular support (120), and the reed switch (200) is located inside the tube body (110), wherein the tubular support (120) is provided with a plurality of limiting columns (121), wherein the top ends of the plurality of limiting columns (121) are fixed to the bottom of the tube body (110), and the ends of the limiting columns (121) are provided with positioning portions (122), wherein the float (300) is located inside the tubular support (120) and can move up and down along the tube body (110), and wherein a magnetic structure (310) is provided at the top end of the float (300).

2. The reed switch liquid level gauge according to claim 1, characterized in that: The plurality of limiting columns (121) are made of plastic material.

3. The reed switch liquid level gauge according to claim 1, characterized in that: The positioning portion (122) adopts a barb design.

4. The reed switch liquid level gauge according to claim 1, characterized in that: The reed switch (200) is provided with a pin (210), and the pin (210) is connected to the electric wire (400).

5. The reed switch liquid level gauge according to claim 4, characterized in that: The tube body (110) is provided with an open end (111), the reed switch (200) is placed in the tube body (110) through the open end (111), and a sealant is used between the open end (111) and the electric wire (400).

6. The reed switch liquid level gauge according to claim 1, characterized in that: A positioning hole (320) is provided at the center of the float (300), the magnetic structure (310) is embedded in the positioning hole (320), and the magnetic structure (310) is a magnet.

7. The reed switch liquid level gauge according to claim 1, characterized in that: The tube body (110) is a circular tube, the axis of the tube body (110) coincides with the axis of the tubular support (120), and the outer diameter of the tube body (110) is the same as the outer diameter of the tubular support (120).

8. The reed switch liquid level gauge according to claim 1, characterized in that: The float (300) is made of foam float material.

9. The reed switch liquid level gauge according to claim 1, characterized in that: The tube body (110) and the tubular support (120) are integrally formed.

10. The reed switch liquid level gauge according to claim 1, characterized in that: Sealant is injected between the reed switch (200) and the tube body (110) to fix the reed switch (200), and the sealant is made of epoxy resin.

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