CN210071072U - Liquid level detection device of liquid storage tank - Google Patents
Liquid level detection device of liquid storage tank Download PDFInfo
- Publication number
- CN210071072U CN210071072U CN201920818866.1U CN201920818866U CN210071072U CN 210071072 U CN210071072 U CN 210071072U CN 201920818866 U CN201920818866 U CN 201920818866U CN 210071072 U CN210071072 U CN 210071072U
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- alarm
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- 239000007788 liquid Substances 0.000 title claims abstract description 113
- 238000003860 storage Methods 0.000 title claims abstract description 50
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 79
- 230000009471 action Effects 0.000 claims abstract description 8
- 230000005389 magnetism Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000007689 inspection Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000010779 crude oil Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 244000273256 Phragmites communis Species 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a liquid level detection device of liquid storage pot belongs to the oil storage equipment field. The liquid level detection device includes: the device comprises a magnetic control part, a floater, a pulley, a fixing part, a magnetic reed switch and a signal transmitter; the magnetic control component is connected with the floater through a pulley, the floater is positioned in the liquid storage tank, and the magnetic control component can move up and down along the length direction of the fixing component along with the up-and-down movement of the floater; the magnetic reed switch is fixed at the reference position of the fixed part and is electrically connected with the signal transmitter, when the magnetic control part moves up and down to a magnetic force range away from the reference position, the magnetic reed switch is attracted under the action of magnetic force, and the signal transmitter automatically transmits an alarm signal. The utility model discloses a magnetism control unit and magnetic reed switch can be so that signal transmitter automatic transmission alarm signal, can avoid needing artifical inspection, and then avoided the manual work not in time discover the liquid storage pot liquid level too high, cause the tank fault accident, bring the problem of loss for production.
Description
Technical Field
The utility model relates to an oil storage equipment field, in particular to liquid level detection device of liquid storage pot.
Background
In the field of the oil industry, liquid storage tanks are mainly used to store crude oil produced by oil wells. When the crude oil level in the liquid storage tank is too high, crude oil may overflow from the liquid storage tank, namely, tank overflow accidents occur, so that production loss is caused, and even safety accidents may occur. Therefore, there is a need to monitor the crude oil level in the storage tank.
In the related art, the liquid level of the liquid storage tank can be monitored by a mechanical float liquid level meter. The mechanical buoy liquid level meter comprises a floater, a steel wire, a pulley, a scale plate and a buoy, wherein a gap is formed in the panel of the scale plate along the length direction of the scale plate, the buoy is located in the gap and can move up and down in the gap, the buoy is connected with the steel wire for the floater through the pulley, and the floater is located in a liquid storage tank. Along with the change of liquid level in the liquid storage pot, the float can reciprocate to drive the float and reciprocate in the gap, the position of float corresponds with the scale on the scale plate, that is to say, the liquid level in the liquid storage pot can reflect through the scale on the scale plate, so, the personnel on duty can accomplish the monitoring to crude oil liquid level in the liquid storage pot through the corresponding scale value of inspection buoy.
However, in actual use, the situation that the work of an operator on duty is neglected or the yield of oil well production is abnormally increased can occur, so that the operator on duty can not find that the liquid level of crude oil in the liquid storage tank is too high in time, the tank overflow accident is caused, and the production loss is brought.
SUMMERY OF THE UTILITY MODEL
The utility model provides a liquid level detection device of liquid storage pot can solve the personnel on duty and can not in time discover that the crude oil liquid level in the liquid storage pot is too high, and then causes the tank overflow accident, brings the problem of loss for production. The technical scheme is as follows:
the utility model provides a liquid level detection device of liquid storage pot, liquid level detection device includes: the device comprises a magnetic control component (1), a floater (2), a pulley (3), a fixed component (4), a magnetic reed switch (5) and a signal transmitter (6);
the magnetic control component (1) is connected with the floater (2) through the pulley (3), the floater (2) is positioned in the liquid storage tank (7), and the magnetic control component (1) can move up and down along the length direction of the fixing component (4) along with the up and down movement of the floater (2);
the magnetic reed switch (5) is fixed at the reference position of the fixed part (4) so as to attract the magnetic reed switch (5) under the action of magnetic force when the magnetic control part (1) moves up and down to a magnetic force range away from the reference position;
the signal transmitter (6) is electrically connected with the reed switch (5) and is used for transmitting an alarm signal when the reed switch (5) is detected to be in a closed state.
In one possible implementation of the present invention,
the magnetic control component (1) is a magnetic buoy; or,
the magnetic control component (1) comprises a buoy and a magnet, and the magnet is fixed on the buoy.
The utility model relates to a possible implementation, liquid level detection device still includes alarm (8), alarm (8) with signalling ware (6) are connected for according to the alarm signal that signalling ware (6) sent reports to the police the suggestion.
In one possible implementation of the present invention,
the alarm (8) is a voice alarm; and/or the presence of a gas in the gas,
the alarm (8) is a photoelectric alarm.
In one possible implementation of the present invention,
the magnetic reed switch (5) is a single-pole single-throw magnetic reed switch; or,
the magnetic reed switch (5) is a single-pole double-throw magnetic reed switch.
The utility model relates to a possible implementation mode, fixed part (4) are equipped with the gap along length direction, magnetism control unit (1) is located in the gap and in can reciprocate in the gap.
In a possible implementation of the invention, the width of the gap is greater than the outer diameter of the magnetic control part (1).
The utility model relates to a possible implementation mode, fixed part (4) are equipped with slide rail (41) along length direction, be equipped with slider (42) on slide rail (41), slider (42) with magnetism control part (1) relatively fixed sets up, and can along with magnetism control part (1) reciprocates and along slide rail (41) reciprocate.
In a possible implementation manner of the present invention, the fixing member (4) is a hollow tube, the inner diameter of the hollow tube is larger than the outer diameter of the magnetic control member (1), and the magnetic control member (1) is located inside the hollow tube.
In a possible implementation of the invention, the magnetic control component (1) is a regular shaped entity.
In a possible implementation manner of the present invention, the shape of the magnetic control component (1) is an inverted triangle
The utility model provides a technical scheme's beneficial effect is:
the utility model provides a liquid level detection device of liquid storage pot mainly includes magnetic control part, float, pulley, fixed part, magnetic reed switch and signal transmitter. The magnetic control component is connected with the floater through a pulley, the floater is positioned in the liquid storage tank, the magnetic control component can move up and down along the length direction of the fixing component along with the up-and-down movement of the floater, the magnetic reed switch is fixed at the reference position of the fixing component and is electrically connected with the signal transmitter, when the magnetic control component moves up and down to a magnetic force range away from the reference position, the magnetic reed switch is attracted under the action of magnetic force, and when the signal transmitter detects that the magnetic reed switch is in a closed state, an alarm signal is transmitted. So, when the liquid level of liquid storage pot rose to a take the altitude, send alarm signal through magnetic control part and magnetic reed switch automatic control signal transmitter, can avoid needing the personnel on duty to go the inspection, and then avoided the personnel on duty not in time discover the liquid storage pot liquid level too high, cause the tank failure accident, bring the problem of loss for production.
Drawings
FIG. 1 is a fluid level sensing assembly for a fluid reservoir, according to an exemplary embodiment;
FIG. 2 is a fluid level sensing assembly for a fluid reservoir, according to another exemplary embodiment;
FIG. 3 is a fluid level sensing assembly for a fluid reservoir, according to another exemplary embodiment.
Reference numerals:
1, a magnetic control component; 2, a floater; 3, a pulley; 4, a fixing part; 5, a magnetic reed switch;
6, a signal transmitter; 7, a liquid storage tank; 8, an alarm;
11, a buoy; 12, a magnet;
41, a slide rail; 42, a slide block; 43, a gap;
51, a normally open reed; 52, a normally closed reed; 53, a swingable reed;
61, a reset button; 62, a switch; 63, a test button;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In view of the fact that a liquid storage tank used in an oil field only needs to perform high liquid level alarm and the change of liquid level does not need to be accurately mastered in production, if a complete set of automatic liquid level monitoring alarm device on the market is purchased, the cost is overhigh and the waste of the functions is also caused. Therefore, the utility model provides a liquid level detection device of liquid storage pot can report to the police and indicate when the liquid level of liquid storage pot reaches a certain height.
Referring to fig. 1, fig. 1 is a view illustrating a liquid level detecting apparatus for a liquid storage tank according to an exemplary embodiment, the liquid level detecting apparatus mainly including a magnetic control part 1, a float 2, a pulley 3, a fixing part 4, a reed switch 5, and a signal transmitter 6.
The magnetic control component 1 is connected with a floater 2 through a pulley 3, the floater 2 is positioned in a liquid storage tank 7, and the magnetic control component 1 can move up and down along the length direction of the fixed component 4 along with the up and down movement of the floater 2. The reed switch 5 is fixed at a reference position of the fixing member 4 to magnetically attract the reed switch 5 when the magnetic control member 1 moves up and down to a magnetic force range from the reference position. The signal transmitter 6 is electrically connected with the reed switch 5 and is used for transmitting an alarm signal when the reed switch 5 is detected to be in a closed state.
Wherein, the reference position can be set according to actual requirements. As an example, the reference position may be generally set according to the maximum liquid level of the liquid storage tank 7, i.e. the reference position may be determined according to the correspondence between the liquid level height when the liquid storage tank 7 reaches the maximum liquid level and the position of the magnetic control part 1.
Illustratively, when the liquid level of the liquid storage tank 7 rises, the float 2 moves upward, and correspondingly, the magnetism control member 1 moves downward, and when the liquid level of the liquid storage tank 7 reaches the maximum liquid level, the float 2 moves upward to the maximum liquid level, and correspondingly, the magnetism control member 1 moves downward to a certain position, which may be determined as a reference position.
The magnetic force range can be generally determined according to the magnetic force characteristics of the magnetic control component 1, and is typically larger when the magnetic force of the magnetic control component 1 is stronger; when the magnetic force of the magnetic control member 1 is weak, the magnetic force range is generally small.
In practical implementation, the floater 2 is located in the liquid storage tank 7 and moves up and down along with the change of the original oil level in the liquid storage tank 7, the floater 2 can drive the magnetic control component 1 to move up and down along the length direction of the fixed component 4 through the pulley 3 in the moving process, the magnetic reed switch 5 is fixed at the reference position of the fixed component 4 and is electrically connected with the signal transmitter 6, when the position reached by the movement of the magnetic control component 1 is within the magnetic force range from the reference position, the magnetic reed switch 5 is attracted under the magnetic force action of the magnetic control component 1, and then the signal transmitter 6 detects the position and the closed state of the magnetic reed switch 5 and can automatically transmit an alarm signal. So, when the liquid level of liquid storage pot 7 rose to a take the altitude, float 2 moved to a take the altitude, drive magnetic control part 1 and move down to the magnetic force within range apart from the reference position, magnetic reed switch 5 is closed under magnetic force effect of magnetic control part 1, and then signal transmitter 6 detects magnetic reed switch 5 and is in the closure state, can send alarm signal automatically, in fact be equivalent to convert high liquid level signal into the signal of telecommunication, convert the signal of telecommunication into alarm signal again, the personnel on duty of having avoided needing to go the inspection, and then avoided the personnel on duty not in time discover liquid storage pot 7 liquid level too high, the emergence tank fault accident, to the problem that produces the loss.
Further, please refer to fig. 2, wherein fig. 2 is a liquid level detection device of a liquid storage tank according to another exemplary embodiment, the liquid level detection device further comprises an alarm 8, and the alarm 8 is connected to the signal transmitter 6 and is used for performing alarm prompt according to the alarm signal transmitted by the signal transmitter 6.
It should be noted that the alarm 8 may be a separate device, or may be mounted on the signal transmitter 6, and when the signal transmitter 6 transmits the alarm signal, the alarm 8 gives an alarm.
In some embodiments, the alarm 8 may be a voice alarm, or the alarm 8 may be a photo alarm, or the alarm 8 may also include both a voice alarm and a photo alarm.
For example, when the alarm 8 is a voice alarm, after receiving the alarm signal sent by the signal transmitter 6, the alarm 8 may sound to alarm in a voice manner; when the alarm 8 is a photoelectric alarm, after receiving the alarm signal sent by the signal sender 6, the indicator light of the alarm 8 can flash, and alarm is given in a manner that the indicator light flashes; when the alarm 8 comprises a voice alarm and a photoelectric alarm, after receiving the alarm signal sent by the signal transmitter 6, the alarm 8 can make a sound and flash an indicator light to alarm in a voice and indicator light flashing manner.
In other embodiments, the signal transmitter 6 may also establish a connection with an electronic device, and transmit an alarm signal to the electronic device, so that the electronic device can be used for alarm reminding. The electronic equipment can be a computer in a duty room, and can carry out alarm reminding by displaying pictures or making a sound after receiving an alarm signal; the electronic equipment can also be a mobile phone of an attendant, and after receiving the alarm signal, the electronic equipment can alarm and remind through ringing or vibration. Therefore, the problem that the crude oil liquid level is not found to be too high due to negligence of operators on duty can be avoided, and the problem that operators on duty cannot find the crude oil liquid level in time when the oil well yield is abnormally increased can also be avoided.
As an example, referring to FIG. 2, upon receiving an alarm reminder, the attendant arrives at the scene and may press a reset button 61 to stop the transmission of the alarm signal and close a signal transmitter switch 62. When the situation is processed and the liquid level of the liquid storage tank 7 is recovered to be normal, the signal transmitter switch 62 is opened to enable the signal transmitter 6 to start normal work.
In some embodiments, referring to fig. 2, the fixing component 4 may be provided with a slide rail 41 along the length direction, the slide rail 41 is provided with a slider 42, and the slider 42 is fixed relative to the magnetic control component 1 and can move up and down along the slide rail 41 as the magnetic control component 1 moves up and down. In this way, since the magnetic control member 1 is fixed to the slider 42, the slider 42 can move up and down along the slide rail 41, but cannot swing left and right, so that the magnetic control member 1 cannot swing left and right, and the problem of false alarm caused by the magnetic reed switch 5 possibly being influenced by the left and right swing of the magnetic control member 1 is avoided.
Illustratively, the slider 42 may be in the same shape as the magnetic control component 1, so that the magnetic control component 1 may be adhered to the slider 42 to ensure that the slider 42 and the magnetic control component 1 can move synchronously; the slider 42 may have a shape similar to a groove, and the magnetic control member 1 may be locked in the groove so that the magnetic control member 1 cannot swing left and right and may move in synchronization with the slider 42.
In other embodiments, referring to fig. 3, the fixing part 4 may be provided with a slit 43 along the length direction, and the magnetic control part 1 is located in the slit 43 and can move up and down in the slit 43. Thus, the magnetic control component 1 can be fixed and can move up and down along the gap 43, so that the left and right swinging is avoided, and the problem of false alarm can be avoided.
As an example, the width of the gap 43 may be larger than the outer diameter of the magnetism control member 1. In this way, the magnetic control member 1 can be further fixed in the slit 43, and the problem of false alarm due to the horizontal swing thereof can be avoided.
In some embodiments, referring to fig. 1, the fixation component 4 may be a hollow tube having an inner diameter larger than an outer diameter of the magnetic control component 1, the magnetic control component 1 being located within the hollow tube. So, also can fix magnetic control part 1, make it can only reciprocate along the length direction of hollow tube, avoid the horizontal hunting, and then can avoid appearing the alert problem of wrong report.
Exemplarily, when the fixing part 4 is a hollow tube, the reed switch 5 may be disposed on an inner wall of the hollow tube, and the reed switch 5 may also be disposed on an outer wall of the hollow tube, which is not limited by the present invention.
In other embodiments, referring to fig. 2, the fixing member 4 may be a plate without scale. Thus, the reference position can be determined according to actual needs according to the corresponding relation between the liquid level height of the liquid storage tank 7 measured in advance and the position of the fixed part 4 reached by the magnetic control part 1.
For example, assuming that the magnetic control member 1 reaches a position of the fixed member 4, which is 50 cm from the bottom of the fixed member 4, when the liquid level of the liquid reservoir tank 7 reaches the maximum level, the reference position may be set at a position 50 cm from the bottom of the fixed member 4.
In other embodiments, referring to fig. 3, the fixed part 4 may be a scale plate. Thus, the reference position can be determined according to actual needs according to the corresponding relation between the liquid level of the liquid storage tank 7 and the scale of the position of the fixed part 4 reached by the magnetic control part 1.
For example, assuming that the magnetic control member 1 reaches the position of the fixed member 4 at the scale of 100 when the liquid level of the liquid reservoir tank 7 reaches the maximum liquid level, the reference position may be set at the position of the fixed member 4 at the scale of 100.
In practical implementation, because the shape of the regular entity has better stability, the magnetic control component 1 may be a regular entity, for example, the shape of the magnetic control component 1 may be an inverted triangle. Referring to fig. 1, the magnetism controlling member 1 may be a float with magnetism, or, referring to fig. 2, the magnetism controlling member 1 may include a float 11 and a magnet 12, and the magnet 12 is fixed to the float 11.
As an example, when the float 11 is made of a material that can attract the magnet 12, the magnet 12 can be directly attracted to the float 11; when the float 11 is made of a material that does not attract the magnet 12, the magnet 12 may be glued to the float 11.
It should be noted that the mass of the magnet 12 is generally small and negligible relative to the float 11.
In practical implementation, the reed switch 5 and the signal transmitter 6 are electrically connected through a wire. The reed switch 5 may be a single-pole single-throw reed switch; alternatively, the reed switch 5 may be a single pole double throw reed switch.
As an example, referring to fig. 1, when the reed switch 5 is a single-pole single-throw reed switch, the single-pole single-throw reed switch includes two reeds, one of which can be connected to the signal transmitter 6 through one wire and the other of which can be connected to the signal transmitter 6 through the other wire, and when no magnetic field is applied, the two reeds are separated, and thus the internal circuit of the signal transmitter 6 is disconnected and does not transmit an alarm signal; when a magnetic field acts, the two reeds are attracted under the action of magnetic force, namely the magnetic reed switch 5 is closed, and then the internal circuit of the signal transmitter 6 is switched on, so that an alarm signal can be transmitted.
As an example, referring to fig. 2, when the reed switch 5 is a single-pole double-throw reed switch, the single-pole double-throw reed switch includes a normally open reed 51, a normally closed reed 52, and a swingable reed 53, the normally open reed 51 is connected to the signal transmitter 6 through one wire, the swingable reed 53 is connected to the signal transmitter 6 through another wire, when no magnetic field is applied, the swingable reed 53 is in contact with the normally closed reed 52, is separated from the normally open reed 51, and further, the internal circuit of the signal transmitter 6 is disconnected and does not transmit an alarm signal; when a magnetic field acts, the swingable reed 53 and the normally open reed 51 attract each other under the action of magnetic force and are separated from the normally closed reed 52, namely, the magnetic reed switch 5 is closed, so that the internal circuit of the signal transmitter 6 is connected, and an alarm signal can be transmitted.
As an example, in order to prevent the signal transmitter 6 from malfunctioning and causing a problem in the liquid level detection device, the signal transmitter 6 may be periodically tested and it may be determined whether the signal transmitter 6 is malfunctioning by checking whether the alarm 8 is alarming.
Illustratively, referring to fig. 2, pressing the test button 63 of the signal transmitter 6 may default to the internal circuit of the signal transmitter 6 being turned on, may transmit an alarm signal, may determine that the signal transmitter 6 is in all right if the alarm 8 performs an alarm operation, and may determine that the signal transmitter 6 may malfunction if the alarm 8 does not perform an alarm operation.
As an example, in order to prevent the reed switch 5 from malfunctioning and causing the liquid level detection device to be out of order, the reed switch 5 may be periodically tested, and whether the reed switch 5 is malfunctioning may be determined by checking whether the alarm 8 is alarming.
Illustratively, the position of the magnetic control member 1 may be located within a magnetic force range from the reference position by pulling the magnetic control member 1 by human power, and if the alarm 8 performs an alarm operation, it may be determined that the magnetic control member 1 is all normal, and if the alarm 8 does not perform an alarm operation, it may be determined that the magnetic control member 1 may malfunction.
The utility model discloses in, provide a liquid level detection device of liquid storage pot, the device mainly includes magnetic control part, float, pulley, fixed part, magnetic reed switch and signal transmitter. The magnetic control part is connected with the floater through the pulley, the floater is positioned in the liquid storage tank, the magnetic control part can move up and down along the length direction of the fixed part along with the up-and-down movement of the floater, the magnetic reed switch is fixed at the reference position of the fixed part and is electrically connected with the signal transmitter, when the magnetic control part moves up and down to a magnetic force range away from the reference position, the magnetic reed switch is attracted under the action of magnetic force, and then the signal transmitter detects that the magnetic reed switch is in a closed state and can automatically transmit an alarm signal. So, when the liquid level of liquid storage pot rose to a take the altitude, make signal transmitter automatic transmission alarm signal through magnetic control part and magnetic reed switch, can avoid needing the personnel on duty to go the inspection, and then avoided the personnel on duty not in time discover the liquid storage pot liquid level too high, cause the tank failure accident, bring the problem of loss for production.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (11)
1. A liquid level detection device of a liquid storage tank is characterized by comprising: the device comprises a magnetic control component (1), a floater (2), a pulley (3), a fixed component (4), a magnetic reed switch (5) and a signal transmitter (6);
the magnetic control component (1) is connected with the floater (2) through the pulley (3), the floater (2) is positioned in the liquid storage tank (7), and the magnetic control component (1) can move up and down along the length direction of the fixing component (4) along with the up and down movement of the floater (2);
the magnetic reed switch (5) is fixed at the reference position of the fixed part (4) so as to attract the magnetic reed switch (5) under the action of magnetic force when the magnetic control part (1) moves up and down to a magnetic force range away from the reference position;
the signal transmitter (6) is electrically connected with the reed switch (5) and is used for transmitting an alarm signal when the reed switch (5) is detected to be in a closed state.
2. The liquid level detection apparatus of claim 1,
the magnetic control component (1) is a magnetic buoy; or,
the magnetic control component (1) comprises a buoy and a magnet, and the magnet is fixed on the buoy.
3. The liquid level detection device according to claim 1, further comprising an alarm (8), wherein the alarm (8) is connected to the signal transmitter (6) for alarming according to the alarm signal transmitted by the signal transmitter (6).
4. The liquid level detection apparatus of claim 3,
the alarm (8) is a voice alarm; and/or the presence of a gas in the gas,
the alarm (8) is a photoelectric alarm.
5. The liquid level detection apparatus of claim 1,
the magnetic reed switch (5) is a single-pole single-throw magnetic reed switch; or,
the magnetic reed switch (5) is a single-pole double-throw magnetic reed switch.
6. The liquid level detection apparatus as claimed in claim 1, wherein the fixing member (4) is provided with a slit along a length direction, and the magnetic control member (1) is located in the slit and is movable up and down in the slit.
7. The liquid level detection device according to claim 6, wherein the width of the gap is larger than the outer diameter of the magnetic control member (1).
8. The liquid level detecting device according to claim 1, wherein the fixing member (4) is provided with a slide rail (41) along a length direction, the slide rail (41) is provided with a slider (42), and the slider (42) is fixed relative to the magnetic control member (1) and can move up and down along the slide rail (41) as the magnetic control member (1) moves up and down.
9. The liquid level detection device according to claim 1, wherein the fixing member (4) is a hollow tube having an inner diameter larger than an outer diameter of the magnetic control member (1), the magnetic control member (1) being located within the hollow tube.
10. The liquid level detection device according to claim 1, wherein the magnetic control member (1) is a regularly shaped entity.
11. The liquid level detection device according to claim 10, wherein the magnetic control member (1) has the shape of an inverted triangle.
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CN201920818866.1U CN210071072U (en) | 2019-05-31 | 2019-05-31 | Liquid level detection device of liquid storage tank |
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