CN219798499U

CN219798499U - Liquid level detection device

Info

Publication number: CN219798499U
Application number: CN202321368528.5U
Authority: CN
Inventors: 林风杰; 叶瑞龙; 龚钰成
Original assignee: Shenzhen Yuanshuo Automation Technology Co ltd
Current assignee: Shenzhen Yuanshuo Automation Technology Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-10-03
Anticipated expiration: 2033-05-31

Abstract

The embodiment of the utility model discloses a liquid level detection device, which comprises: a float rod and a contact sensor; one end of the floating plug rod is connected with a floating ball, and the floating ball floats on the surface of liquid in the liquid tank and drives the floating plug rod to move up and down along with the lifting of the liquid level; the other end of the floating plug rod is in movable contact with the contact sensor, and the contact sensor detects the liquid level according to the contacted part of the floating plug rod. When the water level in the liquid tank drops to the early warning water level, the floating ball can drive the floating plug rod to drop so that the other end of the floating plug rod is separated from the contact sensor to trigger an alarm. Triggering the intelligent alarm of the touch sensor when the liquid level reaches the minimum value. The floating plug rod is convenient to take and can be repeatedly used, meanwhile, liquid is convenient to add, unnecessary waste is reduced, and production cost is reduced.

Description

Liquid level detection device

Technical Field

The utility model belongs to the technical field of liquid level sensors, and particularly relates to a liquid level detection device.

Background

Currently, conventional liquid level detection techniques mostly employ capacitive liquid level sensors or magnetic switch sensors. Capacitive level sensors detect the liquid level by detecting a change in capacitance between the container wall and the electrode. When the liquid to be detected is high-viscosity and high-density liquid, the wall hanging phenomenon can be generated when the liquid to be detected ascends and descends in the container, and the capacitance type liquid level sensor can not detect the specific position of the liquid; in addition, capacitive level sensors are also difficult to detect when the liquid in the container is depleted. The magnetic switch sensor detects through the lifting of the piston caused by the liquid entering the needle cylinder, but due to the structures of the piston and the needle cylinder, the piston is very difficult to take out, the liquid entering the needle cylinder is difficult to clean, the needle cylinder needs to be replaced when necessary, and the use cost is high.

Therefore, such liquid level detection methods are not suitable for high viscosity, high density liquid detection and alarm applications.

Disclosure of Invention

In view of the above, the present utility model aims to provide a liquid level detection device that can alleviate or at least alleviate to some extent the above-mentioned problems.

In order to achieve the above object, an embodiment of the present utility model provides a liquid level detection apparatus, including: a float rod and a contact sensor; one end of the floating plug rod is connected with a floating ball, and the floating ball floats on the surface of liquid in the liquid tank and drives the floating plug rod to move up and down along with the lifting of the liquid level; the other end of the floating plug rod is in movable contact with the contact sensor, and the contact sensor detects the liquid level according to the contacted part of the floating plug rod.

In some embodiments, the contact sensor further comprises an alarm, and when the liquid level drops to the early warning position, the floating ball drives the floating plug rod to descend so that the other end of the floating plug rod is separated from the contact sensor, and the alarm is triggered to alarm.

In some embodiments, the touch sensor further comprises a fixing member thereon for fixing the touch sensor to the liquid tank.

In some embodiments, the contact sensor has a detection port extending axially therethrough, through which the other end of the floating plug rod passes.

In some embodiments, the float is provided with graduations to correspond to different heights of the liquid level.

In some embodiments, the fixing member includes an axially extending sleeve, and the sleeve is sleeved on the periphery of the floating plug rod, so as to prevent the floating plug rod from toppling during the up-and-down movement.

In some embodiments, the sleeve is provided with a radial through hole for passing the liquid to be measured.

In some embodiments, the fixing member includes a connecting plate, and a first cross bar and a second cross bar connected to the connecting plate, respectively, wherein the second cross bar is located above the contact sensor in an axial direction, the connecting plate extends in a vertical direction, and the sleeve sequentially passes through the first cross bar and the second cross bar.

In some embodiments, the liquid level detection apparatus further comprises: the fixing piece further comprises a mounting block, and the contact sensor is arranged on the mounting block.

In some embodiments, the connecting plate is provided with a height adjustment hole for adjusting the movable travel of the floating plug rod.

The liquid level detection device of the embodiment of the utility model comprises: a float rod and a contact sensor. One end of the floating plug rod is connected with the floating ball, and the other end of the floating plug rod is in movable contact with the contact sensor. The floating ball floats on the surface of liquid in the liquid tank by utilizing the buoyancy principle and drives the floating plug rod to move up and down along with the lifting of the liquid level; the contact sensor detects the liquid level according to the contacted part of the floating plug rod, so that the detection of the liquid level can be prevented from being influenced by the density of the liquid. And the connection mode of the floating plug rod and the contact sensor is simple, the floating plug rod is convenient to take and can be reused, unnecessary waste can be reduced, and the production cost is reduced. Meanwhile, the liquid level detection device is arranged so as not to influence the addition of liquid, and the liquid can be conveniently added.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a liquid level detecting device according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of the liquid level detection device of FIG. 1 in another operating state;

fig. 3 is a schematic structural diagram of a liquid level detecting device according to a second embodiment of the present utility model;

FIG. 4 is a schematic view of the liquid level detection apparatus of FIG. 2 in another operating state;

fig. 5 is a schematic structural diagram of a liquid level detecting device according to a third embodiment of the present utility model.

Reference numerals: a liquid level detection device 100; a float member 10; a floating plug rod 11; a float 12; a contact sensor 20; a detection port 21; a fixing member 30; a casing joint 31; a fixed metal plate 32; a first cross bar 33; a connection plate 34; a second cross bar 35; a sleeve 36; a mounting block 37.

Detailed Description

In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings.

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "horizontal," "top," "bottom," "inner," "outer," "axial," "middle," and the like as used in this specification are based on the orientation or positional relationship shown in the drawings, merely to facilitate the description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 and 2, a schematic structure of a liquid level detecting apparatus 100 according to an embodiment of the present utility model is provided, and the liquid level detecting apparatus 100 includes a floating member 10 and a contact sensor 20 connected to each other. The float 10 is movable up and down with the elevation of the liquid level, and the contact sensor 20 is used to detect the liquid level according to the movement of the float 10.

Specifically, the float 10 includes a float rod 11, the float rod 11 extending in a vertical direction, and one axial end thereof being connected to a float ball 12. The "axial direction" herein is the vertical direction. In this embodiment, the float 12 floats above the liquid surface. It will be appreciated that the density of the float 12 is less than the density of the liquid to be measured. Preferably, the density of both the float 12 and the float stem 11 is less than the density of the liquid to be measured. Or the floating plug rod 11 can be made of a material with higher density than the liquid to be detected, as long as the floating ball 12 and the floating plug rod 11 can be integrally positioned on the liquid level, and the floating ball 12 drives the floating plug rod 11 to move up and down along with the lifting of the liquid level.

The other axial end of the plunger rod 11 is movably contacted with the contact sensor 12, the contact sensor 20 has a detection port 21 penetrating axially, and the other axial end of the plunger rod 11 penetrates the detection port 21 of the contact sensor 20. The clearance between the detection port 21 and the plunger rod 11 is small enough so that the detection port 21 can restrict the lateral displacement of the plunger rod 11 when the plunger rod 11 moves axially through the detection port 21. Furthermore, the float rod 11 is provided with graduations corresponding to different heights of the liquid surface. The contact sensor 20 detects the level of the liquid by detecting the scale of the portion of the plunger rod 11 in contact therewith.

Further, the material of the floating plug 11 is metal, and the dimensions of the floating plug 11 are uniform in all radial directions.

Further, the floating ball 12 is an inverted conical rubber floating ball, and the tip end faces downwards. Ensuring that the floating water can be more uniformly floated when floating on the liquid level.

Further, the touch sensor 20 further includes an alarm (not shown). When the liquid level in the liquid tank drops to the early warning liquid level, reference can be made to fig. 2. The other end of the floating plug rod 11 is separated from the contact sensor 20, and an alarm is triggered to give an alarm. Specifically, the contact sensor 20 triggers a program early warning by detecting the presence or absence of a signal, and when the contact sensor 20 detects that the floating plug rod 11 is separated, the contact sensor 20 sends a blanking-free signal to trigger a program early warning prompt.

In the present embodiment, since the floating plug 11 is non-fixedly disposed with the contact sensor 20, the floating plug 11 can be easily taken and reused, and unnecessary waste is reduced. Meanwhile, the liquid is convenient to add, and the production cost is reduced.

As shown in fig. 3 and 4, a schematic structural diagram of a liquid level detection device 100 according to a second embodiment of the present utility model is provided, and the liquid level detection device 100 is different from the first embodiment in that the liquid level detection device 100 further includes a fixing member 30, and the fixing member 30 is used for fixing the contact sensor 20 on the liquid tank, so that the detection of the contact sensor 20 is not affected by the liquid level.

Fig. 5 is a schematic partial structure of a liquid level detecting device 100 according to a third embodiment of the present utility model. The difference from the first embodiment is that the contact sensor 20 ensures the axial displacement of the plunger rod 11 not by means of the axially penetrating detection opening 21 but by means of the fastening element 30.

Specifically, the fixing member 30 includes: the sleeve joint 31, the fixed sheet metal 32, the first cross bar 33, the connecting plate 34, the second cross bar 35, the sleeve 36 and the mounting piece 37. The connecting plate 34 is strip-shaped, extends along the vertical direction, and the connecting plate 34 is fixed on the liquid tank. The connecting plate 34 is fixedly connected with a fixed metal plate 32, a first cross rod 33 and a second cross rod 35 from top to bottom in sequence in the axial direction. Preferably, the fixed sheet metal 32, the first cross bar 33 and the first cross bar 35 are arranged in parallel. The fixed metal plate 32 is connected with a sleeve joint 31. The first cross bar 33 and the first cross bar 35 are respectively provided with a through hole penetrating in the vertical direction. The sleeve 36 extends in a vertical direction and it extends in turn through the through holes of the second rail 35 and the first rail 33 and is connected to the sleeve joint 31. The sleeve 36 is hollow and the float rod 11 can be inserted therein. Preferably, the clearance between the floating plug 11 and the sleeve 36 is small enough that the sleeve 36 limits the axial movement of the floating plug 11, and can effectively prevent the floating plug 11 from toppling during the up-and-down movement. It will be appreciated that the sleeve 36 does not unduly interfere with the movement of the float rod 11.

Preferably, the sleeve 11 is provided with a radial through-going duct for the passage of the liquid to be measured. Therefore, even if the liquid to be measured is viscous and has a large density, the movement of the plug rod 11 within the sleeve 36 is not affected.

Preferably, the floating plug rod 11 is made of iron, the floating ball 12 is a conical floating ball made of rubber, the floating ball 12 is in locking connection with the floating plug rod 11 through a jackscrew, and the sleeve 36 is fixed on the connecting plate 34 through the first cross rod 33, the second cross rod 35, the sleeve joint 31 and the fixed sheet metal 32 and keeps a stretching vertical state.

The fixture 30 also includes a mounting block 37 that is coupled to the web 34. Which is located below the second cross bar 35, the contact sensor 20 is provided on the mounting block 37. The fixing member 30 is movably connected with the floating member 10 and fixedly connected with the contact sensor 20, so that the floating plug rod 11 can be effectively ensured to move vertically and stably along with the liquid level, and the contact sensor 20 is kept fixed, so that the contact sensor can accurately detect the liquid level.

Preferably, the connecting plate 34 is provided with a plurality of height adjusting holes 341 arranged along the axial direction, and the first cross bar 33 and the second cross bar 35 are movably connected with the connecting plate through the height adjusting holes 341. The positions of the first cross bar 33 and the second cross bar 35 on the connecting plate 34 can be conveniently adjusted according to actual conditions so as to adjust the stroke of the floating plug rod 11. It will be appreciated that the length of the sleeve 36 and the plunger rod 11 are configured such that the plunger rod 11 remains nested within the sleeve 36 at all times as it moves upwardly.

In this embodiment, the floating ball 12 floats on the liquid surface of the liquid tank by using the buoyancy principle, the upper part of the floating ball is connected with the iron floating plug rod 11, the contact sensor 20 is fixed beside the floating plug rod 11, and the floating ball 12 drives the floating plug rod 11 to move downwards along with the reduction of the liquid in the liquid tank. When the liquid level reaches the lowest alarm value, the floating plug rod descends along with the floating ball 12 to be separated from the contact sensor 20, and the contact sensor 20 is triggered to alarm. The structure is reasonable, and the floating plug rod is convenient to take and can be reused; the detection effect is accurate, and the influence of the liquid density is avoided.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

The foregoing is only a partial embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. A liquid level detection apparatus, comprising: a float rod and a contact sensor;

one end of the floating plug rod is connected with a floating ball, and the floating ball floats on the surface of liquid in the liquid tank and drives the floating plug rod to move up and down along with the lifting of the liquid level;

the other end of the floating plug rod is in movable contact with the contact sensor, and the contact sensor detects the liquid level according to the contacted part of the floating plug rod.

2. The liquid level detection device according to claim 1, wherein the contact sensor further comprises an alarm, and when the liquid level is lowered to the early warning position, the floating ball drives the floating plug rod to descend so that the other end of the floating plug rod is separated from the contact sensor, and the alarm is triggered to alarm.

3. The fluid level detection device of claim 1, wherein the touch sensor further comprises a securing member thereon for securing the touch sensor to the fluid tank.

4. The liquid level detection device according to claim 1, wherein the contact sensor has a detection port penetrating axially, and the other end of the floating plug rod penetrates the detection port.

5. The liquid level detection apparatus according to claim 1, wherein the float is provided with graduations to correspond to different heights of the liquid level.

6. A liquid level detection apparatus according to claim 3, wherein the fixing member comprises an axially extending sleeve which is fitted around the periphery of the plunger rod for preventing the plunger rod from tilting during the upward and downward movement.

7. The liquid level detection device according to claim 6, wherein the sleeve is provided with a radial through hole for passing the liquid to be detected.

8. The liquid level detection device according to claim 6, wherein the fixing member comprises a connecting plate, and a first cross bar and a second cross bar connected with the connecting plate respectively, wherein the second cross bar is located above the contact sensor in the axial direction, the connecting plate extends in the vertical direction, and the sleeve sequentially passes through the first cross bar and the second cross bar.

9. A liquid level detection apparatus according to claim 3, further comprising: the fixing piece further comprises a mounting block, and the contact sensor is arranged on the mounting block.

10. The liquid level detection device according to claim 8, wherein a height adjustment hole is provided in the connection plate, and the first cross bar and the second cross bar are connected to the connection plate through the height adjustment hole, and are used for adjusting a movement stroke of the floating plug rod.