CN220187817U

CN220187817U - Liquid level sensor

Info

Publication number: CN220187817U
Application number: CN202321949675.1U
Authority: CN
Inventors: 苑广军
Original assignee: Qingdao Xinji Intelligent Control Co ltd
Current assignee: Qingdao Xinji Intelligent Control Co ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2023-12-15
Anticipated expiration: 2033-07-24

Abstract

The utility model discloses a liquid level sensor, which relates to the field of sensing equipment, and the technical scheme is that the liquid level sensor comprises a sensing piece, a sensing piece and a liquid level sensor, wherein the sensing piece comprises a floating body and a magnet connected with the floating body; the sensing module is arranged on the moving path of the sensing piece and can feed back the position and height information of the sensing piece through magnetic coupling with the sensing piece; the shell is used for arranging the induction piece and the induction module; the housing includes: the guide part is used as a moving path carrier of the sensing piece and is in sliding connection with the sensing piece; the induction module is connected with the guide part; and the supporting part is fixedly connected with the guiding part and used as a connecting structure for connecting the sensor and external equipment. The utility model has the beneficial effects that by means of the shell structure of the device, the sensor can be conveniently connected with the side wall of the position where the liquid is located, and the sensing piece serving as the floater can keep a certain distance from the side wall, so that the floatation of the sensing piece is not influenced, and the accuracy of the sensing result is ensured.

Description

Liquid level sensor

Technical Field

The utility model relates to the field of sensing equipment, in particular to a liquid level sensor.

Background

The liquid level detection sensor mainly comprises mechanical and non-contact types, and has the advantages and disadvantages, wherein the mechanical liquid level sensor has the characteristics of high reliability and low cost. However, because of its structural problems, mechanical level sensors tend to have a relatively limited service life. For the non-contact liquid level sensor, the capacitive liquid level sensor and the photoelectric liquid level sensor have specific requirements on the material and thickness of the container wall and certain requirements on the power supply environment, so that the environment in which the capacitive liquid level sensor and the photoelectric liquid level sensor can be applied is limited. The utility model thus proposes a new solution for a non-contact inductive-type sensor.

Disclosure of Invention

Aiming at one of the defects in the prior art, the utility model provides a liquid level sensor, which solves the problem of inconvenient installation of a non-contact liquid level sensor.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a liquid level sensor, comprising:

the sensing piece can move upwards or downwards in a fixed moving path; the sensing piece comprises a floating body and a magnet connected with the floating body, wherein the buoyancy generated by the floating body is greater than the sum of the weights of the magnet and the floating body;

the sensing module is arranged on the moving path of the sensing piece and can feed back the position and height information of the sensing piece through magnetic coupling with the sensing piece;

the shell is used for arranging the induction piece and the induction module; the housing includes:

a guide part as a moving path carrier of the sensing piece and slidingly connected with the sensing piece; the induction module is connected with the guide part;

and the supporting part is fixedly connected with the guiding part and used as a connecting structure for connecting the sensor and external equipment.

Preferably, the floating body of the sensing piece is coated on the outer side of the magnet.

Preferably, the whole induction piece is of an annular structure;

the guide part is a columnar body corresponding to the sensing part, and the sensing part is sleeved outside the guide part and is in sliding connection with the guide part.

Preferably, a cavity is formed in the guide part; the sensor is used as a direction reference, the bottom end of the guide part is a closed end, and the top end of the guide part is provided with a threading hole; the sensing module is a strip-shaped circuit board arranged inside the guide part.

Preferably, the housing further comprises:

the first limiting piece is arranged at the lower part of the guide part and is spliced with the guide part;

the second limiting piece is fixedly arranged at the upper part of the guide part; the first limiting piece corresponds to the bottom end of the stroke of the sensing piece, and the second limiting piece corresponds to the top end of the stroke of the sensing piece.

Preferably, the support part includes:

a cross plate, the plate surface of which is perpendicular to the axis of the guide part; the transverse plate is fixedly connected with the guide part, and the upper end of the guide part extends to the upper side of the transverse plate;

the connecting plate is fixedly connected with the transverse plate and provided with a mounting hole.

Preferably, the connecting plate is disposed at an edge of the transverse plate, and the guide portion is disposed on the transverse plate at a position away from the connecting plate.

Preferably, a notch is formed in the middle of the transverse plate, one side of the notch forms an opening towards the edge where the connecting plate is located, and the other side of the notch is arranged close to the other edge of the transverse plate; the guide part is arranged in the notch at a position far away from the opening;

two sides of an opening formed by the notch are respectively provided with one connecting plate.

Preferably, the support part further includes;

the reinforcing plate is fixedly arranged between the lower side of the notch and the connecting plate, the reinforcing plate is perpendicular to the transverse plate, the upper edge of the reinforcing plate is fixedly connected with the transverse plate, and the two side edges are respectively fixedly connected with the connecting plate and the guide part.

Preferably, the support part further includes;

the support block is arranged corresponding to each connecting plate and fixedly arranged on one side of the connecting plate facing the guide part; one end of the supporting block, which is far away from the connecting plate, is inclined downwards;

preferably, the device further comprises a push rod, wherein the push rod is arranged on one side of the connecting plate, which faces the guide part, and is a telescopic rod body with a hollow inside, and one end of the push rod, which is close to the connecting plate, is sleeved on the outer side of the supporting block; the ejector rod comprises an inner rod and an outer rod which are sleeved, one end of the outer rod, which is close to the inner rod, is provided with a counter bore, and the counter bore is internally connected with a locking bolt through threads; and a top plate is fixedly arranged at one end of the outer rod, which is far away from the inner rod.

Compared with the prior art, the method has the following beneficial effects: the device feeds back the height position of the liquid level through the floating of the sensing piece, and the sensing piece is not directly contacted with the liquid level as a sensing module, is not easy to damage and is convenient to replace. Therefore, the device has longer service life. By means of the shell structure of the device, the sensor can be conveniently connected with the side wall of the position where the liquid is located, and the sensing piece serving as the floater keeps a certain distance from the side wall, so that the floatation of the sensing piece is not affected, and the accuracy of a sensing result is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the overall structure of a second embodiment of the present utility model;

FIG. 3 is an exploded view of an embodiment of the present utility model;

fig. 4 is a schematic structural diagram III according to an embodiment of the present utility model.

In the figure:

1. an induction member; 2. an induction module; 3. a housing; 31. a guide part; 32. a support part; 321. a cross plate; 322. a connecting plate; 323. a reinforcing plate; 324. a support block; 33. a first limiting member; 34. a second limiting piece; 4. and (5) a push rod.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides the following technical solutions:

a liquid level sensor includes a sensing member 1 as a sensing float, the sensing member 1 being adapted to be movable upwardly or downwardly in a fixed movement path under the influence of buoyancy. The sensing piece 1 comprises a floating body and a magnet connected with the floating body, wherein the floating body can generate buoyancy force which is larger than the sum of the weight of the magnet and the weight of the floating body, namely, the floating body can drive the magnet to float along with the lifting of the liquid level. The sensing module 2 is arranged on the moving path of the sensing piece 1, and the sensing module 2 can feed back the position and height information of the sensing piece 1 through magnetic coupling with the sensing piece 1. The sensing piece 1 and the sensing module 2 are both arranged on the housing 3. The housing 3 includes a guide portion 31 and a support portion 32, wherein the guide portion 31 is slidably connected with the sensing piece 1 as a moving path carrier of the sensing piece 1; the sensing module 2 is connected to the guide 31. The support portion 32 is fixedly connected with the guide portion 31 for use as a connection structure for connection of the sensor and an external device.

According to the scheme, the guide part 31 plays a role in limiting the moving range and guiding the sensing piece 1, and along with the change of the height of the liquid level, the position of the sensing piece 1 also changes, so that the sensing module 2 feeds back the position of the sensing piece 1 in the form of an electric signal, high-low level signals are output to the outside through a wire harness, and the power control system reads signals of different water sites.

On the basis of the embodiment, the floating body of the sensing piece 1 is coated on the outer side of the magnet, the magnet is a permanent magnet, the floating body is made of materials such as plastics, rubber and the like which are easy to float, the floating body is directly coated on the magnet, and the service life of the magnet can be prolonged on the premise of not affecting use. If the sensor needs to be applied to liquid with certain corrosiveness, the corresponding corrosion-resistant material can be selected as the floating body and the shell 3.

On the basis of the embodiment, the whole induction piece 1 is of a circular ring structure, namely, the floating body and the magnet are both circular ring-shaped; the guiding portion 31 is a cylindrical body corresponding to the sensing piece 1, and the sensing piece 1 is sleeved on the outer side of the guiding portion 31 and is in sliding connection with the guiding portion 31. The outer diameter of the guide 31 is smaller than the inner diameter of the ring of the sensing element 1. The guiding portion 31 of the present embodiment may also be of prismatic structure, but compared with the guiding portion, the guiding portion has the least possibility of affecting the movement of the sensing member 1.

On the basis of the above embodiment, the inside of the guide part 31 is opened with a cavity; taking the use state of the sensor as a direction reference, namely, the state that the guide part 31 is vertically arranged in the liquid, the bottom end of the guide part 31 is a closed end, and the top end is provided with a threading hole; the sensing module 2 is a strip-shaped circuit board arranged inside the guide part 31, and the electric wires on the strip-shaped circuit board extend outwards from the threading holes. The circuit board of the induction module 2 can be selected from a circuit board with a reed switch or other electrical components capable of feeding back magnetism.

On the basis of the above embodiment, the housing 3 further comprises a first stop 33 and a second stop 34. The first limiting member 33 is disposed at the lower portion of the guiding portion 31, and an annular clamping groove is formed at the lower end of the guiding portion 31, as shown in fig. 3, the first limiting member 33 is a "C" shaped clamping ring, and is clamped in the clamping groove at the lower end of the guiding portion 31. The first limiting member 33 limits the downward travel of the sensing member 1, so as to prevent the sensing member from falling off. The clamping form convenient to disassemble and assemble is adopted, so that the induction piece 1 can be replaced at the later stage conveniently. The second limiting piece 34 is fixedly arranged on the upper part of the guide part 31; the first limiting piece 33 corresponds to the bottom end of the stroke of the sensing piece 1, and the second limiting piece 34 corresponds to the top end of the stroke of the sensing piece 1. The second limiting member 34 is a convex ring-shaped structure arranged on the guiding portion 31. The second limiting member 34 may be selectively inserted or fixedly connected, so long as it is not moved at will in the use state.

On the basis of the above embodiment, the supporting portion 32 includes the cross plate 321, the plate surface of the cross plate 321 is perpendicular to the axis of the guide portion 31; the transverse plate 321 is fixedly connected with the guide part 31, and the upper end of the guide part 31 extends to the upper side of the transverse plate 321. A connecting plate 322 is fixedly arranged at the edge of the transverse plate 321, and a mounting hole is formed in the connecting plate 322. The guide 31 is provided on the transverse plate 321 at a position apart from the connection plate 322, and the connection plate 322 is perpendicular to the transverse plate 321. As shown in fig. 1 and 2, a notch is formed in the middle of the transverse plate 321, and the transverse plate 321 has a structure similar to a V shape because of the notch. One side of the notch forms an opening towards the edge where the connecting plate 322 is positioned, and the other side is arranged close to the other edge of the transverse plate 321; the guide 31 is provided in the gap at a position away from the opening. The connecting plates 322 are respectively arranged on two sides of the opening formed by the notch. A reinforcing plate 323 is further arranged between the lower side of the notch and the connecting plate, the reinforcing plate 323 is perpendicular to the transverse plate 321, the upper edge of the reinforcing plate 323 is fixedly connected with the transverse plate 321, and the two side edges are respectively fixedly connected with the connecting plate 322 and the guide part 31. Through the structure of this scheme, the bolts, steel nails and other objects can be utilized to directly penetrate through the mounting holes on the connecting plate 322, so that the supporting part 32 is fixed on the pool wall where the liquid is located. The guide part 31 is kept at a certain distance from the tank wall by combining the transverse plate 321 with the notch and other structures, so that the floating of the sensing piece 1 can be ensured not to contact with the tank wall, and the accurate and reliable feedback of the sensor can be ensured.

On the basis of the above embodiment, the supporting portion 32 further includes a supporting block 324, one supporting block 324 is provided corresponding to each connecting plate 322, and the supporting block is fixedly disposed on the side of the connecting plate 322 facing the guiding portion 31; the end of the support block 324 remote from the connection plate 322 is inclined downward. The previous embodiment is in the form of a connection with the connection plate 322 directly against the wall of the tank. The second type of connection is provided by the support blocks 324, i.e. bolts or screws are inserted from the side of the connection plate 322 in the direction of the guide 31, in a manner opposite to the previous embodiment. In order to ensure that a sufficient distance is left between the guide part 31 and the pool wall in this case, a hard ejector rod 4 is additionally arranged on the supporting block 324, the axis of the ejector rod 4 is parallel to the axis of the connecting plate 322, one end of the ejector rod 4 is sleeved on the supporting block 324 and abuts against the connecting plate 322, and the other end abuts against the pool wall. And the bolts or screws are directly inserted into the pool wall to complete the connection. As shown in fig. 4, the ejector rod 4 is a telescopic rod body with a hollow interior, and one end of the ejector rod 4, which is close to the connecting plate 322, is sleeved outside the supporting block 324; the ejector rod 4 comprises a sleeved inner rod and an outer rod, one end of the outer rod, which is close to the inner rod, is provided with a counter bore, and the counter bore is internally connected with a locking bolt through threads; the outer pole is kept away from the fixed roof that sets up of one end of interior pole. Because the sensor can be considered to face various different installation environments, namely the tank body structure where the liquid to be sensed is located has various possibilities, the scheme is provided with various different installation forms, and the applicability of the sensor is enhanced.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A liquid level sensor, comprising:

a sensing member (1) movable upward or downward in a fixed moving path; the sensing piece (1) comprises a floating body and a magnet connected with the floating body, wherein the buoyancy generated by the floating body is larger than the sum of the weights of the magnet and the floating body;

the sensing module (2) is arranged on the moving path of the sensing piece (1) and can feed back the position and height information of the sensing piece (1) through magnetic coupling with the sensing piece (1);

a housing (3) for arranging the sensing element (1) and the sensing module (2); the housing (3) comprises:

a guide part (31) which is used as a moving path carrier of the sensing piece (1) and is connected with the sensing piece (1) in a sliding way; the induction module (2) is connected with the guide part (31);

and the supporting part (32) is fixedly connected with the guiding part (31) and is used as a connecting structure for connecting the sensor and external equipment.

2. A liquid level sensor according to claim 1, characterized in that the float of the sensing member (1) is wrapped outside the magnet.

3. The liquid level sensor according to claim 1, characterized in that the sensing member (1) is of an annular structure as a whole;

the guide part (31) is a columnar body corresponding to the induction piece (1), and the induction piece (1) is sleeved on the outer side of the guide part (31) and is in sliding connection with the guide part (31).

4. A liquid level sensor according to claim 3, characterized in that the interior of the guide part (31) is provided with a cavity; the sensor is used as a direction reference, the bottom end of the guide part (31) is a closed end, and the top end is provided with a threading hole; the sensing module (2) is a strip-shaped circuit board arranged inside the guide part (31).

5. The liquid level sensor according to claim 4, wherein the housing (3) further comprises:

the first limiting piece (33) is arranged at the lower part of the guide part (31) and is spliced with the guide part (31);

a second stopper (34) fixedly provided on the upper part of the guide part (31); the first limiting piece (33) corresponds to the bottom end of the stroke of the sensing piece (1), and the second limiting piece (34) corresponds to the top end of the stroke of the sensing piece (1).

6. The liquid level sensor according to claim 1, wherein the support portion (32) includes:

a cross plate (321) having a plate surface perpendicular to the axis of the guide portion (31); the transverse plate (321) is fixedly connected with the guide part (31), and the upper end of the guide part (31) extends to the upper side of the transverse plate (321);

the connecting plate (322) is fixedly connected with the transverse plate (321), and a mounting hole is formed in the connecting plate (322); the connecting plate (322) is arranged at the edge of the transverse plate (321), and the guide part (31) is arranged at a position, far away from the connecting plate (322), on the transverse plate (321).

7. The liquid level sensor according to claim 6, wherein a notch is formed in the middle of the transverse plate (321), one side of the notch forms an opening towards the edge where the connecting plate (322) is located, and the other side is arranged close to the other edge of the transverse plate (321); the guide part (31) is arranged in the notch at a position far away from the opening;

two sides of an opening formed by the notch are respectively provided with a connecting plate (322).

8. The liquid level sensor according to claim 7, wherein the support (32) further comprises;

reinforcing plate (323), fixed setting is in between the downside and the connecting plate of breach department, reinforcing plate (323) with diaphragm (321) is perpendicular, reinforcing plate (323) upper edge portion with diaphragm (321) fixed connection, both sides limit portion respectively with connecting plate (322) and guide part (31) fixed connection.

9. The liquid level sensor according to claim 8, wherein the support (32) further comprises;

the support blocks (324) are arranged corresponding to each connecting plate (322) and fixedly arranged on one side of the connecting plate (322) facing the guide part (31); the end of the support block 324 away from the connecting plate 322 is inclined downward.

10. The fluid level sensor of claim 9, further comprising:

the ejector rod (4) is arranged on one side, facing the guide part (31), of the connecting plate (322), the ejector rod (4) is a telescopic rod body with a hollow interior, and one end, close to the connecting plate (322), of the ejector rod (4) is sleeved on the outer side of the supporting block (324); the ejector rod (4) comprises a sleeved inner rod and an outer rod, one end of the outer rod, which is close to the inner rod, is provided with a counter bore, and the counter bore is internally connected with a locking bolt through threads; and a top plate is fixedly arranged at one end of the outer rod, which is far away from the inner rod.