A dual-signal-point reed switch oil level indicator

Abstract

This utility model discloses a dual-signal-point reed switch oil level indicator, comprising a guide rod, a first reed switch, a second reed switch, a first float, a second float, and a connecting rod. The guide rod contains, from top to bottom, a first reed switch, a connecting rod, and a second reed switch. The connecting rod is silver-plated on the outside. One side of the connecting rod is welded to the first reed switch and a grounding wire, and the other end is welded to the second reed switch. The other sides of the first and second reed switches are welded to a first wire and a second wire, respectively. The guide rod is internally fixed with room-temperature curing adhesive to the first reed switch, the second reed switch, the connecting rod, the grounding wire, the first wire, and the second wire. This utility model has a simple structure, allows for quantitative adjustment of the dual-signal-point distance, reduces the number of reed switch leads, and decreases the installation volume, thus enabling the use of a smaller diameter guide rod. This utility model is easy to debug, effectively improves installation speed, and has good practicality.

Description

Technical Field

[0001] This utility model belongs to the technical field of internal reed switch fixing equipment of reed switch oil level signal device, specifically relating to a reed switch oil level signal device with dual signal points. Background Technology

[0002] Currently, reed switch type fuel level indicator is a commonly used indicator in aircraft fuel measurement, used to issue corresponding fuel level warnings at specific locations. Typically, a single indicator contains one or two signal points. Regardless of whether it's a single-signal-point or dual-signal-point reed switch type fuel level indicator, it consists of a thin guide rod vertically mounted inside the fuel tank and a float containing a permanent magnet. The thin guide rod contains one or two encapsulated reed switches. When the fuel level changes, the float slides up and down the thin guide rod as the fuel level rises or falls. When the float approaches the reed switch, the reed switch spring is attracted or disconnected by the permanent magnet inside the float, thus converting the fuel level signal into an electrical signal output.

[0003] The position of the reed switch inside the thin guide rod of a reed switch-type oil level indicator determines the position of the signal point. The reed switch is sealed into the guide tube by glue injection. This process requires determining the reed switch position before injection, but due to the thin guide rod, limited installation space for the reed switch, and the non-transparent material of the guide rod, adjusting the reed switch position is challenging. For single-signal-point indicators, since there is only one reed switch inside the guide rod, adjusting the reed switch position is relatively easy. However, for indicators with two reed switches, the positions of the two reed switches influence each other, making adjustment difficult and requiring repeated adjustments, thus impacting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a dual-signal-point reed switch oil level signal device, which aims to solve the above-mentioned problems.

[0005] This utility model is mainly achieved through the following technical solutions:

[0006] A dual-signal-point reed switch oil level indicator includes a guide rod, a first reed switch, a second reed switch, a first float, a second float, and a connecting rod. The guide rod has the first reed switch, connecting rod, and second reed switch arranged sequentially from top to bottom inside, and the first float and second float slidably mounted sequentially from top to bottom on its outer side. Permanent magnets are respectively provided on the inner sides of the first and second floats corresponding to the first and second reed switches for driving the reeds to engage or disengage. The connecting rod is silver-plated on its outer side. One side of the connecting rod is welded to the first reed switch and a grounding wire, and the other end is welded to the second reed switch. The other sides of the first and second reed switches are respectively welded to the first and second wires. The first reed switch, second reed switch, connecting rod, grounding wire, first wire, and second wire are fixed inside the guide rod with room-temperature curing adhesive.

[0007] To better realize this utility model, the connecting rod is further provided with welding grooves on both sides corresponding to the pins of the first reed switch and the second reed switch, respectively; and the free side of the welding groove is provided with an opening groove.

[0008] To better realize this utility model, the length L of the connecting rod is further defined as: distance between two signal points on the guide rod - length of the first reed switch and the second reed switch - 2 × reserved length for welding the reed switch pins.

[0009] To better realize this utility model, a glue-filling hole is further provided in the middle of the guide rod, and the connecting rod is located in the middle of the guide rod; the glue-filling hole is used to inject room temperature curing glue into the guide rod.

[0010] To better realize this utility model, a hole is further provided at one end of the guide rod to guide the first reed switch, the connecting rod and the second reed switch connected in sequence.

[0011] To better realize this utility model, the guide rod is further provided with an upper limit step and a lower limit step on both sides corresponding to the first float and the second float, respectively.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) In this invention, one end of the first reed switch and the second reed switch are respectively fixed on the connecting rod. The relative position between the two reed switches is controlled by controlling the length of the connecting rod. Then, only the position of one reed switch needs to be adjusted to determine the position of the two reed switches. The dual-signal point fuel level signaler is easy to debug and has high installation efficiency. Specifically, this invention uses the connecting rod to rigidly connect the first reed switch and the second reed switch, so that the relative position between the first reed switch and the second reed switch is fixed. The relative position between the first reed switch and the second reed switch can be accurately adjusted by changing the connecting rod of different sizes, thereby eliminating the mutual influence between the two reed switches when adjusting the position of the reed switch. This overcomes the defect of the prior art that requires simultaneous adjustment of the positions of the two reed switches. This invention can realize flexible and reliable dual-signal point settings that can adapt to different distances.

[0014] (2) To ensure effective fixation of the connecting rod and reed switch and improve installation efficiency, this invention provides a glue-filling hole at the midpoint between the two signal points on the guide rod for glue filling. This invention adjusts the position of the reed switch by pulling or pushing it according to the float's stroke. When the first and second reed switches are in the correct on / off position, room-temperature curing glue is injected through the glue-filling hole to fix the guide rod internally. This invention has a simple structure, reduces the number of reed switch leads, and decreases the installation volume, allowing for the use of smaller diameter guide rods. This invention is easy to adjust, effectively improves installation speed, and has good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the dual-signal-point reed switch oil level signal device of this utility model;

[0016] Figure 2 The signal schematic diagrams for the first and second reed switches are shown.

[0017] Figure 3 This is a schematic diagram of the connecting rod.

[0018] Wherein: 1-guide rod, 2-room temperature curing adhesive, 3-first wire, 4-grounding wire, 5-first reed switch, 6-first float, 7-connecting rod, 8-second reed switch, 9-second float, 10-second wire, 11-application hole. Detailed Implementation

[0019] Example 1:

[0020] A dual-signal-point reed switch oil level indicator includes a guide rod 1, a first reed switch 5, a second reed switch 8, a first float 6, a second float 9, and a connecting rod 7. The guide rod 1 has the first reed switch 5, the connecting rod 7, and the second reed switch 8 arranged sequentially from top to bottom inside, and the first float 6 and the second float 9 slidably mounted sequentially from top to bottom on the outer side. Permanent magnets are respectively provided on the inner sides of the first float 6 and the second float 9 corresponding to the first reed switch 5 and the second reed switch 8, for driving the reeds to engage or disengage. The connecting rod 7 is silver-plated on the outer side. The first reed switch 5 and the grounding wire 4 are welded to one side of the connecting rod 7, and the second reed switch 8 is welded to the other end. The first wire 3 and the second wire 10 are welded to the other side of the first reed switch 5 and the second reed switch 8, respectively. The first reed switch 5, the second reed switch 8, the connecting rod 7, the grounding wire 4, the first wire 3, and the second wire 10 are fixed inside the guide rod 1 by a room-temperature curing adhesive 2.

[0021] This invention uses a connecting rod 7 to rigidly connect the first reed switch 5 and the second reed switch 8, thus fixing their relative positions. By replacing the connecting rod 7 with one of different sizes, the relative positions of the first reed switch 5 and the second reed switch 8 can be accurately adjusted, thereby eliminating the mutual influence between the two reed switches when adjusting their positions. This overcomes the defect in the prior art that requires simultaneous adjustment of the positions of two reed switches. This invention can achieve flexible and reliable dual signal point settings that can adapt to different distances.

[0022] Example 2:

[0023] A dual-signal-point reed switch oil level indicator, such as Figures 1-3As shown, the device includes a guide rod 1, a first reed switch 5, a second reed switch 8, a first float 6, a second float 9, and a connecting rod 7. The guide rod 1 contains, from top to bottom, the first reed switch 5, the connecting rod 7, and the second reed switch 8. The connecting rod 7 rigidly connects the first reed switch 5 and the second reed switch 8, fixing their relative positions. The connecting rod 7 is silver-plated and has holes at both ends for soldering the reed switch leads and wires. A potting hole 11 is located in the middle of the guide rod 1, and the connecting rod 7 is situated in the middle of the guide rod 1; the potting hole 11 is used to inject room-temperature curing adhesive 2 into the guide rod 1.

[0024] In use, one end of the connecting rod 7 is welded with a first reed switch 5 and a grounding wire 4, and the other end is welded with a second reed switch 8; the other ends of the first reed switch 5 and the second reed switch 8 are respectively welded with a first wire 3 and a second wire 10. Then, a clamp is used to install the assembly consisting of the first reed switch 5, the connecting rod 7, the second reed switch 8, and the wires into a guide rod 1 with a hole at one end. The depth of the hole in the guide rod 1 is determined according to the position of the fuel level indicator signal point. Figure 2 As shown, the first wire 3 and the second wire 10 are used to output the full oil signal and the low oil signal, respectively, and the grounding wire 4 is used for grounding.

[0025] The first float 6 pulls or pushes the first reed switch 5 to adjust its position. When the on / off position of the first reed switch 5 meets the signal point requirements of the oil level indicator, it indicates that the reed switch position has been adjusted correctly. At this time, the on / off position of the second reed switch 8 is checked according to the stroke of the second float 9. If it does not meet the requirements, the length design and manufacturing of the connecting rod 7 should be checked for problems. When the on / off positions of the first reed switch 5 and the second reed switch 8 both meet the requirements, room temperature curing adhesive 2 is injected into the guide rod 1 through the opening at the top of the guide rod 1 and the glue injection hole 11 to fix the first reed switch 5, the second reed switch 8, the connecting rod 7, the grounding wire 4, the first wire 3, and the second wire 10.

[0026] Preferably, such as Figure 3 As shown, welding grooves are provided on both sides of the connecting rod 7, corresponding to the pins of the first reed switch 5 and the second reed switch 8, respectively; and an opening groove is provided on the free side of the welding groove. The length of the connecting rod 7 is determined by the distance between the two signal points. The length L of the connecting rod 7 = distance between the two signal points - reed switch length - 2 × reed switch pin welding allowance, wherein the reed switch pin welding allowance is determined by the fixture during assembly.

[0027] This invention fixes one end of the first reed switch 5 and the second reed switch 8 to the connecting rod 7. The relative position between the two reed switches is controlled by adjusting the length of the connecting rod 7. Therefore, adjusting only one reed switch position determines the positions of both reed switches. This dual-signal point fuel level indicator is easy to debug and has high installation efficiency. The invention has a simple structure, reducing the number of reed switch leads and the installation volume, thus allowing the use of a smaller diameter guide rod 1. This invention is easy to debug, effectively improving the installation speed and possessing good practicality.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A reed switch oil level signal device with dual signal points, characterized in that, The system includes a guide rod (1), a first reed switch (5), a second reed switch (8), a first float (6), a second float (9), and a connecting rod (7). Inside the guide rod (1), from top to bottom, are arranged the first reed switch (5), the connecting rod (7), and the second reed switch (8). On the outside, from top to bottom, are slidably installed the first float (6) and the second float (9). The inner sides of the first float (6) and the second float (9) are respectively provided with permanent magnets corresponding to the first reed switch (5) and the second reed switch (8) to drive the reeds to attract. Or disconnect; the outer side of the connecting rod (7) is silver plated, and the first reed switch (5) and the grounding wire (4) are welded to one side of the connecting rod (7), and the second reed switch (8) is welded to the other end. The first wire (3) and the second wire (10) are welded to the other side of the first reed switch (5) and the second reed switch (8), respectively; the first reed switch (5), the second reed switch (8), the connecting rod (7), the grounding wire (4), the first wire (3) and the second wire (10) are fixed inside the guide rod (1) with room temperature curing glue (2).

2. The dual-signal-point reed switch oil level signal device according to claim 1, characterized in that, The connecting rod (7) has welding grooves on both sides corresponding to the pins of the first reed switch (5) and the second reed switch (8), respectively; and the free side of the welding groove has an opening groove.

3. The dual-signal-point reed switch oil level signal device according to claim 2, characterized in that, The length L of the connecting rod (7) = the distance between the two signal points on the guide rod (1) - the length of the first reed switch (5) and the second reed switch (8) - 2 × the reserved length for welding the reed switch pins.

4. A dual-signal-point reed switch oil level signal device according to any one of claims 1-3, characterized in that, The guide rod (1) has a glue-filling hole (11) in the middle, and the connecting rod (7) is located in the middle of the guide rod (1); the glue-filling hole (11) is used to inject room temperature curing glue (2) into the guide rod (1).

5. A dual-signal-point reed switch oil level signal device according to claim 1, characterized in that, One end of the guide rod (1) is perforated to allow the first reed switch (5), the connecting rod (7), and the second reed switch (8) to be connected in sequence.

6. A dual-signal-point reed switch oil level signal device according to claim 1, characterized in that, The guide rod (1) has upper limit steps and lower limit steps on both sides corresponding to the first float (6) and the second float (9), respectively.

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