A reed switch liquid level gauge for self-expansion connection

Abstract

The utility model discloses a reed switch liquid level gauge for self-expansion connection, comprising: a cavity, a reed switch, a self-expansion screw and an expansion part, the reed switch is fixed inside the cavity, the pin of the reed switch is connected with the electric wire, the self-expansion screw is connected with the expansion part through a connecting hole component, both sides of the expansion part are provided with inclined surfaces, the expansion part comprises a first expansion part and a second expansion part, a first groove is arranged between the first expansion part and the second expansion part, the first groove is communicated with the connecting hole component, a second groove is arranged below the expansion part, the second groove and the first groove are both communicated with the connecting hole component, the self-expansion screw is plugged into the connecting hole component, the self-expansion screw can open the first groove under the action of external force, so that the first expansion part and the second expansion part are separated from each other, the inclined surface can make the liquid level gauge move freely in the groove, after the position of the liquid level gauge is determined, the self-expansion screw is screwed to clamp the self-expansion structure with the groove of the external profile, so as to achieve the effect of accurately and quickly fixing the reed switch liquid level gauge.

Description

Technical Field

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

[0002] Reed switch level gauges are widely used in industries such as oil refining, chemical industry, papermaking, food and sewage treatment to display, alarm and control the liquid level of open / closed containers and underground tanks. To use a reed switch level gauge, the level gauge must first be fixed to the machine equipment to be detected. There are two ways to fix the level gauge in the prior art. One is to set a bolt hole at the upper end of the level gauge and tighten it to the machine. The other side needs to be installed on the machine through a customized groove. Both of these fixing methods will cause inconvenience in terms of installation angle. First, the position of the level gauge cannot be moved after it is fixed. Or adjustment, and the use of reed switches has requirements on the measurement sensitivity. Therefore, once the position of the reed switch needs to be moved due to sensitivity adjustment, these two fixing methods need to be disassembled and reinstalled, resulting in low installation efficiency. More importantly, from a production perspective, the sensitivity of mass-produced reed switches is difficult to control to be absolutely consistent. Therefore, it is very common to adjust the position of the reed switch during its use. Bolt fixing cannot meet one requirement at all. The customized groove fixing method requires replacing different grooves, which not only increases production costs but also reduces production efficiency. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a reed switch liquid level gauge for self-expanding connection. By designing a self-expanding structure on the reed switch housing, the installation position of the reed switch liquid level gauge can be adjusted arbitrarily, thus solving the problems caused by the existing fixing method.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: A reed switch liquid level gauge for self-expanding connection, comprising: a cavity, a reed switch, a self-expanding screw and an expansion part, the reed switch is fixed inside the cavity, the pin of the reed switch is connected to the electric wire, the self-expanding screw is connected to the expansion part through a connecting hole assembly, and inclined surfaces are provided on both sides of the expansion part. The expansion part comprises a first expansion part and a second expansion part, a first groove is provided between the first expansion part and the second expansion part, the first groove is connected to the connecting hole assembly, a second groove is provided below the expansion part, the second groove and the first groove are both connected to the connecting hole assembly, the self-expanding screw is inserted into the connecting hole assembly, and the self-expanding screw can open the first groove under the action of external force to make the first expansion part and the second expansion part move away from each other.

[0005] Compared with the prior art, the beneficial effect of the utility model is that: the surface of the cavity where the reed switch liquid level gauge is placed is provided with an expansion part, which is used to connect with the groove of the external profile, and inclined surfaces are provided on both sides of the expansion part so that the reed switch liquid level gauge can move freely in the groove of the required connection profile, and the self-expanding screw can expand the groove at the expansion part under the twisting pressure of external force. When the position of the reed switch liquid level gauge is determined, the self-expanding screw is tightened to clamp the self-expanding structure with the groove of the external profile, so as to achieve the effect of accurately and quickly fixing the reed switch liquid level gauge.

[0006] In the above-mentioned reed switch liquid level gauge, the connecting hole assembly includes a through hole, a connecting groove and a blind hole, the through hole is connected to the blind hole through the connecting groove, the through hole passes through one end of the cavity, and the self-expanding screw is inserted into the through hole.

[0007] In the above-mentioned reed switch liquid level gauge, a fixing groove is provided at one end of the connecting hole assembly, the fixing groove is located at the outer edge of the through hole, a nut sheet is provided in the fixing groove, and the self-expanding screw is connected to the nut sheet after being inserted into the through hole.

[0008] In the above-mentioned reed switch liquid level gauge, the first expansion portion has a first inclined surface, a first side surface and a first end surface, the first inclined surface and the first side surface are connected through the first platform, and the first inclined surface, the first platform and the first side surface are all connected to the first end surface.

[0009] In the above-mentioned reed switch liquid level gauge, the second expansion portion has a second inclined surface, a second side surface and a second end surface, the second inclined surface and the second side surface are connected through the second platform, and the second inclined surface, the second platform and the second side surface are all connected to the second end surface.

[0010] In the above-mentioned reed switch liquid level gauge, a support portion is provided on one end of the cavity away from the expansion portion, and the support portion includes a first boss and a second boss, the first boss and the second boss are connected, and an elastic support member is provided on the second boss, and the elastic support member protrudes from the end surface of the cavity.

[0011] In the above-mentioned reed switch liquid level gauge, a support portion is provided on one end of the cavity away from the expansion portion, and the support portion includes a first boss and a second boss, the first boss and the second boss are connected, and an elastic support member is provided on the second boss, and the elastic support member protrudes from the end surface of the cavity.

[0012] In the above-mentioned reed switch liquid level gauge, a PCB board is provided inside the cavity, and the pins are connected to the wires through the PCB board.

[0013] In the above-mentioned reed switch liquid level gauge, one end of the cavity is provided with a wire hole, and the wire can pass through the wire hole to be connected to the PCB board.

[0014] The above-mentioned reed switch liquid level gauge has an open end on the cavity, and the open end is used for installation and removal of the reed switch, the PCB board and the wire.

[0015] The above-mentioned reed switch liquid level gauge has the cavity filled with cured epoxy resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 1 ;

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

[0018] Figure 3 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 3 ;

[0019] Figure 4 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 4 ;

[0020] Figure 5 The structure of the reed switch liquid level gauge of the utility model is shown in FIG. Figure 5 ;

[0021] Description of the accompanying drawings: 100 cavity, 110 wire hole, 120 open end, 130 support part, 131 first boss, 132 second boss, 133 elastic support member, 200 reed switch, 210 pin, 300 self-expanding screw, 400 expansion part, 410 first expansion part, 411 first inclined surface, 412 first side surface, 413 first end surface, 414 first platform, 420 second expansion part, 421 second inclined surface, 422 second side surface, 423 second end surface, 424 second platform, 430 first groove, 440 second groove, 500 PCB board, 600 connecting hole assembly, 610 through hole, 620 connecting groove, 630 blind hole, 640 fixing groove, 650 nut sheet, 700 wire. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below. Figures 1 to 5The embodiment of the utility model provides a reed switch liquid level gauge for self-expansion connection, comprising: a cavity 100, a reed switch 200, a self-expansion screw 300 and an expansion part 400, the reed switch 200 is fixed inside the cavity 100, the pin 210 of the reed switch 200 is connected to the wire 700, the self-expansion screw 300 is connected to the expansion part 400 through a connecting hole assembly 600, and inclined surfaces are provided on both sides of the expansion part 400, the expansion part 400 comprises a first expansion part 410 and a second expansion part 420, a first groove 430 is provided between the first expansion part 410 and the second expansion part 420, the first groove 430 is communicated with the connecting hole assembly 600, a second groove 440 is provided below the expansion part 400, and the second groove 440 and the first groove 430 are both connected The connecting hole assembly 600 is connected, and the self-expanding screw 300 is inserted into the connecting hole assembly 600. The self-expanding screw 300 can open the first groove 430 under the action of external force, so that the first expansion part 410 and the second expansion part 420 are separated from each other. The surface of the cavity 100 where the reed switch liquid level gauge is placed is provided with an expansion part 400, which is used to connect with the groove of the external profile. Inclined surfaces are provided on both sides of the expansion part 400, so that the reed switch liquid level gauge can move freely in the groove of the required connection profile. The self-expanding screw 300 can expand the groove at the expansion part 400 under the twisting and pressing of external force. When the position of the reed switch liquid level gauge is determined, the self-expanding screw 300 is twisted and pressed to clamp the expansion part 400 with the groove of the external profile, so as to achieve the effect of accurately and quickly fixing the reed switch liquid level gauge.

[0023] Furthermore, the cavity 100 is used to accommodate the reed switch 200. A PCB board 500 is provided inside the cavity 100. The pin 210 of the reed switch 200 is connected to the wire 700 through the PCB board 500. Figure 2 and Figure 5 , a wire hole 110 is provided at one end of the cavity 100, and the wire 700 can pass through the wire hole 110 to connect with the PCB board 500, and an open end 120 is provided on the cavity 100, and the open end 120 is used for installation and removal of the reed switch 200, the PCB board 500 and the wire 700. Furthermore, the cavity 100 is filled with cured epoxy resin, and the epoxy resin completely seals and covers the PCB board. Of course, the utility model does not limit the type of epoxy resin. Further, the utility model does not limit the specific connection method between the pin 210 and the wire 700. Preferably, the two pins 210 of the reed switch 200 are Z-bent and flattened and are welded to the PCB. The two pins 210 are welded to the wire 700 through the circuit on the PCB. Further, referring to Figure 4 The first expansion joint 410 has a first inclined surface 411, a first side surface 412 and a first end surface 413. The first inclined surface 411 and the first side surface 412 are connected by a first platform 414. The first inclined surface 411, the first platform 414 and the first side surface 412 are all connected to the first end surface 413. Figure 3 The second expansion joint 420 has a second inclined surface 421, a second side surface 422 and a second end surface 423. The second inclined surface 421 and the second side surface 422 are connected by a second platform 424. The second inclined surface 421, the second platform 424 and the second side surface 422 are all connected to the second end surface 423. The first inclined surface 411 and the second inclined surface 421 are located on both sides of the entire expansion joint 400. When the reed switch liquid level gauge needs to be installed in the groove of the external profile, the first inclined surface 411 and the second inclined surface 421 make the end size of the entire expansion joint 400 smaller than the overall size of the entire reed switch liquid level gauge. Therefore, there is a certain gap between the reed switch liquid level gauge and the external profile when the reed switch liquid level gauge is installed, so that the reed switch liquid level gauge can move freely in the groove of the external profile. A first groove 430 is provided between the first expansion joint 410 and the second expansion joint 420. Figure 3 The connecting hole assembly 600 includes a through hole 610, a connecting groove 620 and a blind hole 630. The through hole 610 is connected to the blind hole 630 through the connecting groove 620. The through hole 610 passes through one end of the cavity 100. The self-expanding screw 300 is inserted into the through hole 610. Further, the first groove 430 is connected to the through hole 610. When the self-expanding screw 300 is pressed down, the first expansion part 410 and the second expansion part 420 will be expanded. The connecting groove 620 and the blind hole 630 are mainly used to provide sufficient expansion space for the through hole 610 to prevent the outer periphery of the through hole 610 from cracking due to the downward pressure when the self-expanding screw 300 is pressed down. Further, referring to Figure 2 and Figure 5 A fixing groove 640 is provided at one end of the connecting hole component 600, and the fixing groove 640 is located at the outer edge of the through hole. A nut piece 650 is provided in the fixing groove 640. After the self-expanding screw 300 is inserted into the through hole, it is connected with the nut piece 650. The fixing groove 640 is used to place the nut piece 650, and the nut piece 650 is used to be fixed with the self-expanding screw 300. When the self-expanding screw 300 is tightened downward under the action of external force, the self-expanding screw 300 can be tightened and fixed with the nut piece 650 so that the self-expanding screw 300 can be firmly fixed on the groove. Of course, the utility model does not limit the specific structure of the self-expanding screw 300. Preferably, one end of the self-expanding screw 300 has a cross countersunk head for connecting with the installation tool.

[0024] Further, a support portion 130 is provided at one end of the cavity 100 away from the expansion joint 400, and the support portion 130 includes a first boss 131 and a second boss 132, the first boss 131 and the second boss 132 are connected, and an elastic support member 133 is provided on the second boss 132, and the elastic support member 133 protrudes from the end surface of the cavity 100, and the first boss 131 is mainly used to reserve an avoidance space so that the elastic support member 133 can be completely squeezed and fixed in the groove of the external profile under the action of an external force. The support portion 130 is mainly used to assist in fixing the liquid level gauge. When the self-expanding screw 300 is clamped with the groove of the external profile under the action of external force, the elastic support member 133 is fixed in the groove of the external profile under the extrusion of the external force. Since the elastic support member 133 has elastic force, the tail of the reed switch liquid level gauge can be better fixed in the groove of the external profile. Of course, the utility model does not limit the specific structure of the elastic support member 133. Preferably, the elastic support member 133 protrudes from the end face of the cavity 100.

[0025] Furthermore, the self-expanding screw 300 and the expansion part 400 are used to fix the entire reed switch liquid level gauge in the groove of the external profile. The specific position where the reed switch liquid level gauge is fixed and how to find the correct position need to be determined by a combination of several factors such as the sensitivity of the reed switch 200, the strength of the magnet, and the position at which the equipment needs to trigger the signal. This needs to be determined by technical personnel in this field based on actual installation requirements and is not limited in the present utility model.

[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 reed switch liquid level gauge for self-expanding connection, and the meaning of "more than" is two or more than two. "greater than", "less than", "exceed" and the like are understood as not including the number, and "above", "below", "within" and the like are understood as including the number. If there is a description of the first reed switch liquid level gauge for self-expanding connection or the second, it is only used for the purpose of distinguishing 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 reed switch liquid level gauge for self-expansion connection, characterized in that: include: A cavity (100), a reed switch (200), a self-expanding screw (300) and an expansion joint (400), wherein the reed switch (200) is fixed inside the cavity (100), a pin (210) of the reed switch (200) is connected to an electric wire (700), the self-expanding screw (300) is connected to the expansion joint (400) through a connecting hole assembly (600), both sides of the expansion joint (400) are provided with inclined surfaces, the expansion joint (400) comprises a first expansion joint (410) and a second expansion joint (420), the first expansion joint (410) and the second expansion joint (420) are connected to each other. A first groove (430) is provided between the two expansion joints (400), the first groove (430) is connected to the connecting hole assembly (600), a second groove (440) is provided below the expansion joint (400), the second groove (440) and the first groove (430) are both connected to the connecting hole assembly (600), the self-expanding screw (300) is inserted into the connecting hole assembly (600), and the self-expanding screw (300) can open the first groove (430) under the action of external force, so that the first expansion joint (410) and the second expansion joint (420) are separated from each other.

2. The reed switch liquid level gauge according to claim 1, characterized in that: The connecting hole assembly (600) comprises a through hole (610), a connecting groove (620) and a blind hole (630); the through hole (610) is connected to the blind hole (630) via the connecting groove (620); the through hole (610) passes through one end of the cavity (100); and the self-expanding screw (300) is inserted into the through hole (610).

3. The reed switch liquid level gauge according to claim 2, characterized in that: A fixing groove (640) is provided at one end of the connecting hole assembly (600), and the fixing groove (640) is located at the outer edge of the through hole (610). A nut sheet (650) is provided in the fixing groove (640), and the self-expanding screw (300) is connected to the nut sheet (650) after being inserted into the through hole (610).

4. The reed switch liquid level gauge according to claim 1, characterized in that: The first expansion joint (410) has a first inclined surface (411), a first side surface (412) and a first end surface (413); the first inclined surface (411) and the first side surface (412) are connected via a first platform (414); the first inclined surface (411), the first platform (414) and the first side surface (412) are all connected to the first end surface (413).

5. The reed switch liquid level gauge according to claim 1, characterized in that: The second expansion joint (420) has a second inclined surface (421), a second side surface (422) and a second end surface (423); the second inclined surface (421) and the second side surface (422) are connected via a second platform (424); the second inclined surface (421), the second platform (424) and the second side surface (422) are all connected to the second end surface (423).

6. The reed switch liquid level gauge according to claim 1, characterized in that: A support portion (130) is provided on one end of the cavity (100) away from the expansion portion (400), and the support portion (130) includes a first boss (131) and a second boss (132), the first boss (131) and the second boss (132) are connected, and an elastic support member (133) is provided on the second boss (132), and the elastic support member (133) protrudes from the end surface of the cavity (100).

7. The reed switch liquid level gauge according to claim 1, characterized in that: A PCB board (500) is provided inside the cavity (100), and the pin (210) is connected to the wire (700) through the PCB board (500).

8. The reed switch liquid level gauge according to claim 7, characterized in that: One end of the cavity (100) is provided with a wire hole (110), and the wire (700) can pass through the wire hole (110) to be connected to the PCB board (500).

9. The reed switch liquid level gauge according to claim 7, characterized in that: The cavity (100) is provided with an open end (120), and the open end (120) is used for taking and installing the reed switch (200), the PCB board (500) and the electric wire (700).

10. The reed switch liquid level gauge according to claim 1, characterized in that: The cavity (100) is filled with cured epoxy resin.

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