CN220472746U - Electromagnetic pendulum type level gauge - Google Patents
Electromagnetic pendulum type level gauge Download PDFInfo
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- CN220472746U CN220472746U CN202321903636.8U CN202321903636U CN220472746U CN 220472746 U CN220472746 U CN 220472746U CN 202321903636 U CN202321903636 U CN 202321903636U CN 220472746 U CN220472746 U CN 220472746U
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- level gauge
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- 238000001514 detection method Methods 0.000 claims abstract description 32
- 239000000725 suspension Substances 0.000 claims abstract description 3
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 43
- 239000000428 dust Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005358 geomagnetic field Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an electromagnetic pendulum type level gauge. The device comprises a shell, wherein a rotating shaft is arranged at the upper part of the shell through a shaft seat, a swing arm is arranged at the inner end of the rotating shaft, a detection plate is arranged at the lower end of the swing arm, a plate body of the detection plate is parallel to the central line of the rotating shaft, a suspension magnetic armature is arranged on the rotating shaft, an arc-shaped electromagnetic coil is also arranged on the shell and below the magnetic armature, the lower end of the magnetic armature is not contacted with the electromagnetic coil, and a first proximity sensor and a second proximity sensor are respectively arranged on the shell and on two sides of the magnetic armature; the device further comprises a controller, and the electromagnetic coil, the first proximity sensor and the second proximity sensor are all connected with the controller. The electromagnetic pendulum type level gauge provided by the utility model has the advantages that the structural design is reasonable, the operation is stable, the problems of hysteresis and blockage are not easy to generate, the influence of materials is not easy to cause, and the electromagnetic pendulum type level gauge is particularly suitable for detecting the level in an environment with high dust, high tar and high viscosity.
Description
Technical Field
The utility model belongs to the technical field of level gauges, and particularly relates to an electromagnetic pendulum type level gauge.
Background
The level gauge is a gauge for detecting the change of the height of the solid material in the container in real time. Level gauges, also known as level transmitters, level controllers, level gauges, etc., are commonly used to detect whether the level of material in a container has reached a set level. In the prior art, a rotation-resistant material level meter is generally used for detecting the material level, and the rotation-resistant material level meter is also called a rotation-resistant material level meter or a rotation-resistant material level switch according to the application, and the working principle of the rotation-resistant material level meter is as follows: after the AC micro motor is adopted to reduce the speed, the detection blade is driven to rotate at a low speed, and when the material level of the detected material rises to stop the rotation of the blade, the rotation of the rotation shaft of the detection mechanism generates rotary displacement, and the displacement firstly enables a micro switch to act and sends out a signal of the presence of the material. Then the other micro switch acts to cut off the power supply of the micro motor to stop the rotation. This state will be maintained as long as the level in the bin is unchanged.
In some scenarios, for example, the application of the aforementioned rotation-resistant level meter in a high dust, high tar, high viscosity environment, there are the following problems: because the rotating part and the sleeve are in a high adhesion environment, tar and dust easily enter the bearing sleeve, the rotating part of the level gauge is delayed and blocked; on the other hand, because the detection part of the rotation-resistant material level meter rotates in a revolving way, some materials which are easy to wire drawing are easy to wind on the detection part, further the problems of hysteresis and blockage are further caused, and after the problems of hysteresis and blockage are caused, the problem of misjudgment is easy to occur, so that the material level cannot be effectively detected.
In summary, a new level gauge needs to be developed and designed, which can still effectively detect the level when applied in the aforementioned severe environment.
Disclosure of Invention
The utility model provides an electromagnetic pendulum type level gauge which is reasonable in structural design, stable and reliable in operation, not easy to delay and block and not easy to be influenced by materials, and solves the technical problems in the prior art.
The utility model adopts the technical proposal for solving the technical problems in the prior art that: the electromagnetic pendulum type level gauge comprises a shell, wherein a rotating shaft is arranged at the upper part of the shell through a shaft seat, a swing arm is arranged at the inner end of the rotating shaft, a detection plate is arranged at the lower end of the swing arm, a plate body of the detection plate is parallel to the central line of the rotating shaft, a suspended magnetic armature is arranged on the rotating shaft, an arc-shaped electromagnetic coil is also arranged on the shell and below the magnetic armature, the lower end of the magnetic armature is not contacted with the electromagnetic coil, and a first proximity sensor and a second proximity sensor are respectively arranged on the shell and on two sides of the magnetic armature; the device further comprises a controller, and the electromagnetic coil, the first proximity sensor and the second proximity sensor are all connected with the controller.
Preferably: the first proximity sensor and the second proximity sensor are symmetrically arranged along the vertical plane where the central line of the rotating shaft is positioned.
Preferably: a plurality of groups of sensor mounting holes which are arranged in a fan shape and are centered on the central line of the rotating shaft are arranged on the shell, and the first proximity sensor and the second proximity sensor are mounted on the sensor mounting holes by bolts.
Preferably: the electromagnetic coil comprises an arc-shaped coil matrix with a rectangular section, a coil is wound on the coil matrix, support plates are mounted at the left end and the right end of the coil matrix, and the inner side edges of the two support plates are fixedly connected with the shell.
Preferably: the shell comprises a trapezoid-shaped upper shell, the top of the upper shell is sealed, the bottom of the upper shell is open, and a wing plate is arranged outside the bottom opening of the upper shell; the shaft seat is arranged at the upper part of the front surface of the upper shell, the electromagnetic coil is arranged at the lower part of the front surface of the upper shell, and the first proximity sensor and the second proximity sensor are arranged at two sides of the middle part of the front surface of the upper shell.
The utility model has the advantages and positive effects that:
the utility model provides an electromagnetic pendulum type material level meter with reasonable structural design, which adopts the principle of an electromagnetic pendulum to detect the material level, in the detection state, a controller controls an electromagnetic coil to periodically forward power connection and reverse power connection, so that a magnetic armature periodically swings leftwards and rightwards in a changed magnetic field to drive a swing arm and a detection plate to synchronously swing, when the material level of a material rises to be in contact with the detection plate, the swing action of the detection plate and the swing arm is subject to the blocking action of the material, and the magnetic armature cannot move in place, so that the material level is judged to rise to the height of the detection plate, and the detection is accurate.
Compared with the existing rotation-resistant material level meter, the electromagnetic pendulum type material level meter provided by the utility model detects materials by means of the swinging action of the pendulum assembly, namely the pendulum assembly is equivalent to the detection part of the rotation-resistant material level meter, and compared with the rotary detection part, the swing type material level meter is not easy to cause the problems of blocking and blockage caused by dust, high-viscosity materials and the like, and is stable and reliable in work. Because the lower end of the magnetic armature is acted by the magnetic force generated by the electromagnetic coil, and the magnetic armature has a certain length, the electromagnetic coil exerts a larger torque effect on the magnetic armature, and even if a certain retardation problem exists, the torque effect can still enable the magnetic armature and the pendulum assembly to normally operate, so that the work is stable and reliable. On the other hand, compared with the anti-rotation type material level gauge, the pendulum assembly of the material level gauge does reciprocating swing rather than rotary rotation, so that the electromagnetic pendulum type material level gauge can work normally in some viscous wiredrawing materials, namely, the electromagnetic pendulum type material level gauge is less influenced by the types of the materials.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure:
1. a housing; 2. a rotating shaft; 3. a magnetic armature; 4. swing arms; 5. an electromagnetic coil; 6. a first proximity sensor; 7. a second proximity sensor; 8. a detection plate; 9. a shaft seat; 10. a support plate; 11. and a controller.
Detailed Description
In order to further understand the summary, features and advantages of the present utility model, the following examples are set forth in detail.
Referring to fig. 1, the electromagnetic pendulum type level gauge of the utility model comprises a housing 1, a rotating shaft 2 is arranged at the upper part of the housing 1 through a shaft seat 9, a swinging arm 4 is arranged at the inner end of the rotating shaft 2, a detection plate 8 is arranged at the lower end of the swinging arm 4, a plate body of the detection plate 8 is parallel to the central line of the rotating shaft 2, and a suspension magnetic armature 3 is arranged on the rotating shaft 2.
A ball bearing is arranged in the shaft seat 9, and the rotating shaft 2 is fixedly connected with the inner ring of the bearing, so that the rotating shaft 2 can flexibly rotate. As shown in the figure, the outer end of the rotating shaft 2 is square, the main body of the magnetic armature 3 is cuboid, a square shaft hole is formed in the upper end of the main body, and the square outer end of the rotating shaft 2 is located in the square shaft hole of the magnetic armature 3. Similarly, the inner end of the rotating shaft 2 is square, a square shaft hole is formed in the upper end of the swing arm 4, and the square inner end of the rotating shaft 2 is located in the square shaft hole of the swing arm 4. Thus, the pendulum assembly composed of the swing arm 4 and the detection plate 8 swings in synchronization with the magnetic armature 3.
As shown in the figure, a notch is formed at the lower end of the swing arm 4, the detection plate 8 is a rectangular thin plate, and the middle part of the top of the detection plate is positioned in the notch at the lower end of the swing arm 4 and fixed.
An arc-shaped electromagnetic coil 5 is also arranged on the shell 1 and below the magnetic armature 3, and the lower end of the magnetic armature 3 is not contacted with the electromagnetic coil 5. As shown in the drawing, the electromagnetic coil 5 includes a coil base having an arc shape and a rectangular cross section, on which a coil is wound, and support plates 10 are mounted at both left and right ends of the coil base, and inner edges of the two support plates 10 are fixedly connected with the housing 1.
A first proximity sensor 6 and a second proximity sensor 7 are respectively mounted on both sides of the magnetic armature 3 on the housing 1, the first proximity sensor 6 and the second proximity sensor 7 being selected as proximity switches, and the proximity switches generate detection signals when the magnetic armature 3 swings to a position close to the first proximity sensor 6 and the second proximity sensor 7. As shown in the figure, the first proximity sensor 6 and the second proximity sensor 7 are symmetrically disposed on the left and right along the vertical plane where the center line of the rotating shaft 2 is located, that is, the swing angle of swinging the first proximity sensor 6 to one side and swinging the second proximity sensor 7 to the right is the same with the vertical downward being the zero position of the magnetic armature 3.
In this embodiment, a plurality of groups of sensor mounting holes are provided in the housing 1, the groups being arranged in a fan shape with respect to the center line of the rotating shaft 2 as the center, and the first proximity sensor 6 and the second proximity sensor 7 are mounted on the sensor mounting holes by bolts. The sensor mounting holes of each group on two sides of the center surface are symmetrically arranged left and right, and the function of the sensor mounting holes of each group is to enable the mounting positions of the first proximity sensor 6 and the second proximity sensor 7 to be adjustable and set, so that the swing angle of the magnetic armature 3 to two sides is reduced when the two are moved to the middle part, and otherwise, the swing angle of the magnetic armature 3 to two sides is increased when the two are moved to the outer side.
In this embodiment, the casing 1 includes a trapezoid body shaped upper casing, the top of the upper casing is sealed, the bottom is open, and a wing plate is arranged outside the bottom opening of the upper casing, so the casing 1 is a bottom flaring and open structure, the purpose of setting the wing plate is to install on a bracket in a container, a mounting hole can be arranged on the wing plate, the electromagnetic pendulum type level gauge is mounted on the bracket by adopting a bolt, and the detection plate 8 should be located at the high limit position of the level. The other function of the shell 1 is to seal the connection positions of the rotating shaft 2, the shaft seat 9 and the swing arm 4, so that dust and the like are prevented from falling into the connection positions, and the smoothness of the swing action is prevented.
The shaft seat 9 is installed at the upper part of the front surface of the upper housing, the electromagnetic coil 5 is installed at the lower part of the front surface of the upper housing, and the first proximity sensor 6 and the second proximity sensor 7 are installed at both sides of the middle part of the front surface of the upper housing.
Also included is a controller 11, with the electromagnetic coil 5, the first proximity sensor 6 and the second proximity sensor 7 all being connected to the controller 11. The controller 11 is constructed based on a PLC chip and includes a processor unit, an ac-dc conversion unit for converting ac mains power supplied from a power line into dc power and supplying the dc power to the electromagnetic coil 5, and a relay unit for controlling a current direction in the electromagnetic coil 5, wherein when the relay unit is located at a first position, a current in the electromagnetic coil 5 is a forward current, and when the relay unit is converted into a second position, a current in the electromagnetic coil 5 is a reverse current, and a corresponding geomagnetic field direction is changed. The detection signals of the magnetic armature 3 by both the first proximity sensor 6 and the second proximity sensor 7 are sent to the processor unit for the processor unit to perform action judgment.
The operation mode is as follows:
the electromagnetic pendulum type level gauge is arranged and fixed on a bracket in a container, a controller 11 is generally arranged outside the container, and a wire harness penetrating through the container is adopted to connect an electromagnetic coil 5, a first proximity sensor 6 and a second proximity sensor 7 with the controller 11;
the processor unit of the controller 11 instructs the relay unit to act, make the direct current power supply forward connected to the coil of the electromagnetic coil 5, because the electromagnetic induction principle (right hand rule is adopted to judge the direction of the magnetic field) produces the electromagnetic field, the magnetic armature 3 receives the magnetic force in the built electromagnetic field, the magnetic armature 3 swings and moves leftwards, correspondingly the pendulum assembly formed by the swinging arm 4 and the detecting plate 8 swings leftwards, when the magnetic armature 3 approaches the first proximity sensor 6, the first proximity sensor 6 produces the detecting signal to the processor unit, the processor unit instructs the relay unit to act, make the direct current power supply reversely connected to the coil of the electromagnetic coil 5, produce the reverse electromagnetic field, the magnetic armature 3 swings rightwards under the magnetic force in the built electromagnetic field, when the magnetic armature 3 approaches the second proximity sensor 7, the second proximity sensor 7 produces the detecting signal to the processor unit, the processor unit instructs the relay unit to act again to change the connection current direction of the electromagnetic coil 5, the pendulum assembly of the electromagnetic pendulum level meter periodically swings leftwards, the controller 11 measures the swinging period time and measures the time difference of the first proximity sensor 7 and the second proximity sensor 7;
when the material level in the container rises to the level of the detection plate 8, the detection plate 8 of the pendulum assembly is in contact with the material in the swinging process and is blocked, so that the swinging period of the pendulum assembly is changed, or the detection plate 8 cannot be separated from the material under the blocking effect of the material to stop swinging of the pendulum assembly, at the moment, the controller 11 judges that the material has reached the set height position, and generates a material level signal to a control system of the equipment/production line, and at the moment, the control system can stop injecting the material into the container. Along with the use of materials, the material level gradually decreases, the blocking effect of the detection plate 8 disappears, and the electromagnetic pendulum type material level meter is restored to a detection state.
Claims (5)
1. An electromagnetic pendulum type level gauge is characterized in that: the device comprises a shell (1), wherein a rotating shaft (2) is arranged at the upper part of the shell (1) through a shaft seat (9), a swinging arm (4) is arranged at the inner end of the rotating shaft (2), a detection plate (8) is arranged at the lower end of the swinging arm (4), the plate body of the detection plate (8) is parallel to the central line of the rotating shaft (2), a suspension magnetic armature (3) is arranged on the rotating shaft (2), an arc-shaped electromagnetic coil (5) is also arranged on the shell (1) and below the magnetic armature (3), the lower end of the magnetic armature (3) is not contacted with the electromagnetic coil (5), and a first proximity sensor (6) and a second proximity sensor (7) are respectively arranged on the shell (1) and on two sides of the magnetic armature (3); the device further comprises a controller (11), and the electromagnetic coil (5), the first proximity sensor (6) and the second proximity sensor (7) are all connected with the controller (11).
2. The electromagnetic pendulum level gauge of claim 1, wherein: the first proximity sensor (6) and the second proximity sensor (7) are symmetrically arranged along the vertical plane where the central line of the rotating shaft (2) is located.
3. The electromagnetic pendulum level gauge of claim 2, wherein: a plurality of groups of sensor mounting holes which are arranged in a fan shape and are centered on the central line of the rotating shaft (2) are arranged on the shell (1), and a first proximity sensor (6) and a second proximity sensor (7) are mounted on the sensor mounting holes by bolts.
4. The electromagnetic pendulum level gauge of claim 3, wherein: the electromagnetic coil (5) comprises a coil matrix with an arc shape and a rectangular section, a coil is wound on the coil matrix, support plates (10) are arranged at the left end and the right end of the coil matrix, and the inner side edges of the two support plates (10) are fixedly connected with the shell (1).
5. The electromagnetic pendulum level gauge of claim 4, wherein: the shell (1) comprises a trapezoid-shaped upper shell, the top of the upper shell is sealed, the bottom of the upper shell is open, and a wing plate is arranged outside the bottom opening of the upper shell; the shaft seat (9) is arranged at the upper part of the front surface of the upper shell, the electromagnetic coil (5) is arranged at the lower part of the front surface of the upper shell, and the first proximity sensor (6) and the second proximity sensor (7) are arranged at two sides of the middle part of the front surface of the upper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321903636.8U CN220472746U (en) | 2023-07-19 | 2023-07-19 | Electromagnetic pendulum type level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321903636.8U CN220472746U (en) | 2023-07-19 | 2023-07-19 | Electromagnetic pendulum type level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220472746U true CN220472746U (en) | 2024-02-09 |
Family
ID=89780729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321903636.8U Active CN220472746U (en) | 2023-07-19 | 2023-07-19 | Electromagnetic pendulum type level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220472746U (en) |
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2023
- 2023-07-19 CN CN202321903636.8U patent/CN220472746U/en active Active
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