CN219624862U - Liquid level meter capable of preventing liquid level fluctuation interference - Google Patents

Abstract

The utility model provides a liquid level meter capable of preventing liquid level fluctuation interference, and belongs to the technical field of liquid level meters. The device comprises an upper connecting seat, a lower connecting seat, a conduit and a floating ball, wherein the upper connecting seat and the lower connecting seat are respectively fixed at two ends of the conduit, at least one reed switch is arranged in the conduit, the reed switch comprises a first electric connection reed, a second electric connection reed and a middle reed, and the reed switch is closed when the two ends of the middle reed are simultaneously contacted with the inner ends of the first electric connection reed and the inner ends of the second electric connection reed; the floating ball is internally provided with a permanent magnetic strip positioned at the outer side of the sleeve. The utility model has the advantages of effectively solving the interference of liquid level fluctuation on detection and the like.

Description

Liquid level meter capable of preventing liquid level fluctuation interference

Technical Field

The utility model belongs to the technical field of liquid level meters, and relates to a liquid level meter capable of preventing liquid level fluctuation interference.

Background

The floating ball type reed pipe liquid level meter consists of three parts, namely a magnetic floating ball, a reed pipe sensor and a switch. When the magnetic floating ball floats up and down along the guide pipe to the reed pipe sensor along with the change of the liquid level, the two reeds of the reed pipe are magnetized by the external magnetic field of the magnetic steel, so that the two magnetized reeds are mutually contacted and conducted, and when the external magnetic field of the magnetic steel is far away from the reed pipe sensor, the two reeds of the reed pipe are gradually demagnetized and disconnected.

When the fluctuation of the liquid level is small or almost no liquid level fluctuation exists, the reed pipe liquid level meter can accurately indicate the liquid level information, however, when the fluctuation of the liquid level is large, the liquid level information is often difficult to accurately indicate due to the fact that the position of the magnetic floating ball jumping on the guide pipe has a large error with the actual liquid level, and if the liquid level detection scene of the motor vehicle oil tank, the liquid level detection scene of the liquid inlet container is caused by liquid flow impact, and the like.

The problem that the liquid level fluctuation interferes with the liquid level of the reed pipe type liquid level meter is solved, a bypass mode is often adopted, namely a sleeve is used for wrapping a guide pipe and a magnetic floating ball, then the inner cavity of the sleeve is connected with the containing cavity of the actual detection liquid through a bypass pipe, as shown in fig. 1, the interference of the liquid level fluctuation in the actual detection environment on the liquid level in the sleeve 7 can be greatly reduced, but the problem of scale deposit in the sleeve 7 and the bypass pipe 6 is also brought by the mode, and the maintenance burden of the liquid level meter is increased.

Disclosure of Invention

The utility model aims to solve the problems of the prior art and provide a liquid level meter capable of preventing liquid level fluctuation interference, and the technical problem to be solved by the utility model is how to reduce the interference of the liquid level fluctuation on the triggering of the liquid level meter.

The aim of the utility model can be achieved by the following technical scheme: the liquid level meter is characterized by comprising an upper connecting seat, a lower connecting seat, a guide pipe and a floating ball, wherein the upper connecting seat and the lower connecting seat are respectively fixed at two ends of the guide pipe, at least one reed switch is arranged in the guide pipe and comprises a first electric connection reed, a second electric connection reed and a middle reed, and the reed switch is closed when the two ends of the middle reed are simultaneously contacted with the inner ends of the first electric connection reed and the inner ends of the second electric connection reed; the floating ball is internally provided with a permanent magnetic strip positioned at the outer side of the sleeve.

The floating ball is provided with an inner hole allowing the guide pipe to swing relative to the floating ball, and the swing amplitude of the guide pipe relative to the floating ball is as follows: the inclination angle between the central line of the floating ball and the axis of the guide pipe is between-20 and 20 degrees.

Further, the gravity center of the floating ball is positioned at one side of the center line of the floating ball.

Further, the inner hole comprises two large-diameter parts and a positioning part positioned between the two large-diameter parts, the diameter of the positioning part is matched with the outer diameter of the catheter, and the diameter of the large-diameter part is larger than that of the positioning part.

In this scheme, change traditional double reed normal open structure into three reed normally open structure, only when middle reed contact first electric reed and second electric reed simultaneously, the level gauge switches on, because the floater can swing relative pipe, when the liquid level takes place undulantly, the floater is difficult to keep coaxial with the pipe for a long time, first electric reed, second electric reed and middle reed three can not be magnetized simultaneously, the level gauge is non-conductive, only when liquid level undulant disappears or weakens, the floater relative pipe swing disappears or weakens, first electric reed, second electric reed and middle reed three just can keep the distance that is magnetized simultaneously with the permanent magnetism strip, thereby make the tip of first electric reed and the tip of second electric reed contact with the both ends of middle reed simultaneously when being magnetized, the level gauge switches on.

Drawings

Fig. 1 is a schematic view of a prior art gauge.

Fig. 2 is a schematic structural view of the present gauge.

Fig. 3 is a schematic structural view of the floating ball moving to the permanent magnetic strip in the state of no liquid level fluctuation.

Fig. 4 is a schematic structural view of the floating ball moving to the permanent magnetic strip in the state of fluctuation of the liquid level.

Fig. 5 a is a schematic diagram of the trigger state of the reed switch before the floating ball approaches the reed switch; fig. 5 b is a schematic diagram of the trigger state of the reed switch when the floating ball part is close to the reed switch; fig. 5 c is a schematic diagram of the trigger state of the reed switch when the floating ball covers the reed switch entirely; fig. 5 d is a schematic diagram of the trigger state of the reed switch when the floating ball tilts relative to the catheter.

In the figure, 11, an upper connecting seat; 12. a lower connecting seat; 2. a conduit; 3. a floating ball; 41. a first contact spring; 42. a second contact spring; 43. a middle reed; 44. a permanent magnet strip; 5. an inner bore; 51. a large diameter portion; 52. a positioning part; 6. a bypass pipe; 7. a sleeve.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

The liquid level meter capable of resisting liquid level fluctuation interference as shown in fig. 2 and 3 comprises an upper connecting seat 11, a lower connecting seat 12, a guide pipe 2 and a floating ball 3, wherein the upper connecting seat 11 and the lower connecting seat 12 are respectively fixed at two ends of the guide pipe 2, at least one reed switch is arranged in the guide pipe 2 and comprises a first connecting reed 41, a second connecting reed 42 and a middle reed 43, and the reed switch is closed when the two ends of the middle reed 43 are simultaneously contacted with the inner ends of the first connecting reed 41 and the inner ends of the second connecting reed 42; the floating ball 3 is internally provided with a permanent magnetic strip 44 positioned outside the sleeve.

The floating ball 3 is provided with an inner hole 5 which allows the conduit 2 to swing relative to the floating ball 3, and the swing amplitude of the conduit 2 relative to the floating ball 3 is as follows: the inclination angle between the central line of the floating ball 3 and the axis of the guide pipe 2 is between-20 and 20 degrees; the inner bore 5 comprises two large diameter portions 51 and a positioning portion 52 located between the two large diameter portions 51, the diameter of the positioning portion 52 being adapted to the outer diameter of the catheter 2, the diameter of the large diameter portion 51 being larger than the diameter of the positioning portion 52.

The gravity center of the floating ball 3 is positioned at one side of the center line of the floating ball 3. The traditional liquid level meter is a ring magnet, the scheme adopts a strip-shaped permanent magnet strip 44 on one side of the non-voice conduit 2, after the shell of the floating ball 3 is filled with low-density filler, the whole gravity center of the floating ball 3 is deviated due to the bias of the permanent magnet strip 44, namely, when the liquid level fluctuates, the gravity center of the floating ball 3 is positioned on one side of the middle of the floating ball 3, the side far away from the gravity center is easily lifted by the interference of the liquid level, and the side close to the gravity center is not easily interfered by the liquid level, so that under the fluctuation of the liquid level, the floating ball 3 is difficult to stably maintain a coaxial state with the conduit 2, even if the floating ball 3 reaches the position of the conduit 2 where the reed pipe is positioned, the two contacts of the middle reed 43 are difficult to simultaneously contact the first power-receiving reed 41 and the second power-receiving reed 42 to realize the conduction of the liquid level meter, as shown in fig. 3, and when the fluctuation of the liquid level is reduced or eliminated, the liquid level is positioned in the middle position of the floating ball 3, the floating ball 3 tends to be coaxial with the conduit 2, as shown in fig. 4, at this moment, the liquid level meter can realize the conduction, and the signal of the liquid level reaches a certain position.

Fig. 5 illustrates various states of the reed pipe in the whole process of moving the floating ball 3 on the guide pipe 2, in which fig. a shows that when the floating ball 3 does not reach the position of the reed pipe, the first electric connection reed 41 and the second electric connection reed 42 of the reed pipe are in the disconnection state, when the floating ball 3 moves to the position shown in fig. b, the permanent magnet strip 44 on the floating ball 3 starts to approach the first electric connection reed 41, but the second electric connection reed 42 is still in the disconnection state, when the floating ball 3 continues to move to the state shown in fig. c, the permanent magnet strip 44 covers the middle reed 43, the first electric connection reed 41 and the second electric connection reed 42 respectively keep contact with two ends of the middle reed 43, the liquid level meter is in the connection state, when the liquid level fluctuates to cause the floating ball 3 to incline relative to the guide pipe 2, as shown in fig. d, one end of the permanent magnet strip 44 approaches the first electric connection reed 41, and the other end of the second electric connection reed 42 is far away, although the magnetic strip 44 covers the outer side area of the middle reed 43, the permanent magnet strip 44 does not have the intensity of promoting the second electric connection reed 42 due to the distance, and the liquid level magnetization is kept in the longitudinal direction of the second electric connection reed 42, and the floating ball 2 is always in the disconnection state, and the electric connection reed pipe 2 is continuously slides relative to the middle reed 2, and the second electric connection reed 2 is not always in the state is kept in the connection state of the relative to the middle reed pipe, and the electric connection reed 2 is in the state is in the connection state.

In practical application, liquid level detection of a moving mechanism such as a motor vehicle acquires liquid level information when the moving mechanism is stopped, and does not acquire the liquid level information when the liquid level fluctuates; when a certain container is input with quantitative liquid, liquid level information is not acquired when the liquid is input, and the liquid level information is acquired in real time in the slow liquid consumption process without great fluctuation of the liquid level, so that adverse effects caused by wrong liquid level information use scenes are avoided.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (3)

1. The utility model provides a prevent liquid level fluctuation interference's level gauge, its characterized in that includes upper connection seat (11), lower connection seat (12), pipe (2) and floater (3), upper connection seat (11) and lower connection seat (12) are fixed respectively in the both ends of pipe (2), be provided with at least one tongue tube switch in pipe (2), tongue tube switch includes first electric connection reed (41), second electric connection reed (42) and middle reed (43), tongue tube switch is closed when the inner of first electric connection reed (41), second electric connection reed (42) are contacted simultaneously to the both ends of middle reed (43); a permanent magnet strip (44) positioned at the outer side of the sleeve is arranged in the floating ball (3);

the floating ball (3) is provided with an inner hole (5) which allows the guide pipe (2) to swing relative to the floating ball (3), and the swing amplitude of the guide pipe (2) relative to the floating ball (3) is as follows: the inclination angle between the central line of the floating ball (3) and the axis of the guide pipe (2) is between-20 and 20 degrees.

2. The liquid level meter for preventing liquid level fluctuation interference according to claim 1, wherein the gravity center of the floating ball (3) is located at one side of the center line of the floating ball (3).

3. The gauge according to claim 1, characterized in that the inner bore (5) comprises two large diameter parts (51) and a positioning part (52) between the two large diameter parts (51), the diameter of the positioning part (52) being adapted to the outer diameter of the conduit (2), the diameter of the large diameter part (51) being larger than the diameter of the positioning part (52).