CN212206279U - Magnetostrictive liquid level meter and measuring rod thereof - Google Patents
Magnetostrictive liquid level meter and measuring rod thereof Download PDFInfo
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- CN212206279U CN212206279U CN202020885221.2U CN202020885221U CN212206279U CN 212206279 U CN212206279 U CN 212206279U CN 202020885221 U CN202020885221 U CN 202020885221U CN 212206279 U CN212206279 U CN 212206279U
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Abstract
The utility model relates to a magnetostrictive liquid level meter and a measuring rod thereof, relating to the field of sensors; the measuring rod comprises a sensor probe rod and a sensor protective tube; the sensor probe rod comprises an insulating tube; the waveguide wire is stretched and directly arranged in the insulating tube; the sensor protective tube comprises a sleeve sleeved outside the insulating tube; a plug used for sealing an opening at the tail end of the sleeve is arranged at the tail end of the sleeve; the return line is arranged between the sleeve and the insulating tube; the tail end of the return wire is led into the insulating tube and is electrically connected with the waveguide wire. The utility model discloses have and measure more accurate effect.
Description
Technical Field
The utility model belongs to the technical field of the sensor and specifically relates to a magnetostrictive liquid level meter and measuring stick thereof is related to.
Background
At present, when a sensor of a magnetostrictive liquid level meter works, a circuit part of the sensor excites pulse current on a waveguide wire, and when the current propagates along the waveguide wire, a pulse current magnetic field is generated around the waveguide wire; a sensor probe rod of the magnetostrictive liquid level meter is externally provided with a floater, and the floater can move up and down along the probe rod along with the change of the liquid level; a group of permanent magnetic rings are arranged inside the floater; when the pulse current magnetic field meets the magnetic ring magnetic field generated by the floater, the magnetic field around the floater changes, so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse at the position of the floater, and the pulse is transmitted back along the waveguide wire at a fixed speed and is detected by the detection mechanism. The position of the float, i.e. the position of the liquid level, can be accurately determined by measuring the time difference between the pulse current and the torsional wave.
The waveguide wire in the measuring rod of the existing liquid level meter is isolated from the outer metal pipe through a silica gel piece or an insulating pipe; for example, a flexible magnetostrictive liquid level meter waveguide wire supporting device is disclosed in the Chinese utility model with the publication number of CN 208536986U; comprises a polytetrafluoroethylene protective pipe; a plurality of rubber supporting seats are arranged in the polytetrafluoroethylene tube, the rubber supporting seats are arranged in the polytetrafluoroethylene tube at equal intervals, and the magnetostrictive waveguide wire and a return line commonly used by a magnetostrictive liquid level meter sequentially penetrate through a middle hole of the rubber supporting seats.
The above prior art solutions have the following drawbacks: although the structure that the waveguide wire is isolated from the polytetrafluoroethylene tube by using the rubber support seat is simple, the waveguide wire is closely contacted with the rubber support seat when penetrating through the rubber support seat, and although the rubber can absorb mechanical vibration to reduce the generation of noise, echo reflection is possibly generated at the rubber support seat because the characteristic impedance changes to cause the loss of signals, so that the torsional wave pulse signals transmitted to the detection mechanism are weakened, and the detection precision is influenced; in addition, the return line and the waveguide wire are all arranged in the insulating tube in a penetrating mode, and although the return line and the waveguide wire are supported by the rubber supporting seat, the return line and the waveguide wire are difficult to ensure not to be close to or even contact with each other in the measuring section, and when the return line and the waveguide wire are close to each other, noise can be generated to further affect the detection result.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a magnetostrictive liquid level meter measuring staff measures more accurately.
The above object of the present invention is achieved by the following technical solutions:
a measuring rod comprises a sensor probe rod and a sensor protective tube; the sensor probe rod comprises an insulating tube; the waveguide wire is stretched and directly arranged in the insulating tube; the sensor protective tube comprises a sleeve sleeved outside the insulating tube; a plug used for sealing an opening at the tail end of the sleeve is arranged at the tail end of the sleeve; the return line is arranged between the sleeve and the insulating tube; the tail end of the return wire is led into the insulating tube and is electrically connected with the waveguide wire.
By adopting the technical scheme, the waveguide wire is arranged in the insulating tube in a penetrating way, the return line is arranged outside the insulating tube, so that the waveguide wire is thoroughly isolated from the return line in the measuring section, the waveguide wire is not in direct contact with other structures in the insulating tube, the noise is reduced, and meanwhile, the loss of echo reflection to signals is reduced, so that the measurement is more accurate; in addition, the sensor probe rod and the sensor protective tube are independently produced and processed respectively and then are assembled together, and the quality is more easily controlled through independent production processes.
The present invention may be further configured in a preferred embodiment as: the sensor probe rod also comprises a C-shaped pipe sleeved outside the insulating pipe; an installation groove is formed between the C-shaped pipe and the insulating pipe along the length direction of the insulating pipe; the return line is embedded in the mounting groove.
Through adopting above-mentioned technical scheme, restrict the position of return wire through the mounting groove to avoid the return wire to take place to remove on the insulating tube.
The present invention may be further configured in a preferred embodiment as: a notch penetrating through the outer wall of the C-shaped pipe is formed in the outer wall of the C-shaped pipe along the length direction of the C-shaped pipe; the installation groove is formed by a notch in the outer wall of the C-shaped pipe and the outer wall of the insulating pipe.
By adopting the technical scheme, the installation groove is convenient to open, and the internal structures of the C-shaped pipe and the insulating pipe are not damaged.
The present invention may be further configured in a preferred embodiment as: the tail end of the sensor probe rod is positioned in the sensor protective tube and is internally provided with a waveguide wire tail end tensioning device used for elastically tensioning the waveguide wire and the return line.
By adopting the technical scheme, the waveguide wire is always in a tensioned and straightened state in the insulating tube through the terminal tensioning device of the waveguide wire, the possibility that the waveguide wire touches the outer wall of the insulating tube is reduced, and therefore noise is reduced.
The present invention may be further configured in a preferred embodiment as: the waveguide wire tail end tensioning device comprises a connecting seat in sliding fit with the sensor probe rod and a pressure spring arranged on one side of the connecting seat, which is far away from the plug, and used for extruding the connecting seat towards the direction of the plug; the elastic direction of the pressure spring is parallel to the sliding direction of the connecting seat; the waveguide wire and the return wire are tightened between the pressure springs, and the tail ends of the waveguide wire and the return wire are respectively fixed on the connecting seat.
Through adopting above-mentioned technical scheme, the spring is in compression state all the time, and under the drive of spring force, the connecting seat has the trend of end cap motion all the time to make the wave guide silk return line be in the state of tightening the flare-out all the time, reduce the possibility of wave guide silk touching insulating tube outer wall, thereby reduced the noise.
The present invention may be further configured in a preferred embodiment as: the waveguide wire tensioning device also comprises a limiting pipe coaxially arranged at the tail end of the sensor probe rod; two ends of the pressure spring are respectively abutted against the end surfaces of the connecting seat and the limiting pipe; the return pipe passes through the outer wall of the limiting pipe and the pressure spring and is fixed on the connecting seat.
By adopting the technical scheme, the return line can be conveniently introduced into the spring without opening a hole on the insulating tube, so that the damage to the inner structure of the insulating tube is reduced; in addition, the limiting pipe plays a limiting role, limits the position of the spring together, and enables the spring to be in a compression state all the time.
The magnetostrictive liquid level meter also comprises a coil sensor and a floater matched with the measuring rod; the coil sensor comprises an inner tube, a reel coaxially arranged in the inner tube, a coil wound on the reel, a locking block arranged at an opening of one end of the inner tube, which is far away from the reel, a shielding wire with one end electrically connected with the output end of the coil and the other end penetrating through the locking block, and an outer tube sleeved outside the inner tube and fixed with the inner tube; damping rubber piers with two ends respectively abutted against the reel and the locking block are arranged between the reel and the locking block; the return line penetrates through the locking block, the damping rubber pier and the reel and is positioned in the measuring rod; a hose with an axis parallel to the axis of the reel is arranged above the reel, and the return line is arranged in the hose in a penetrating way; a permanent magnetic ring is arranged in the floater.
By adopting the technical scheme, the magnetostrictive liquid level meter can output more accurate measurement data.
To sum up, the utility model discloses a following at least one useful technological effect:
1. compared with the prior art, the waveguide wire is thoroughly isolated from the return line, and the waveguide wire is not directly contacted with any other structure at the detection part, so that the influence of noise and echo reflection on signals is reduced, and the measurement is more accurate;
2. the waveguide wire is always in a stretched state in the insulating tube by arranging the waveguide wire tail end tensioning device, so that the measurement accuracy is further improved.
Drawings
FIG. 1 is a schematic view of a magnetostrictive liquid level gauge and a measuring rod thereof;
FIG. 2 is a schematic structural view of a coil sensor assembly and a sensor probe;
FIG. 3 is an exploded view of the coil sensor assembly showing its construction;
FIG. 4 is a cross-sectional view showing the structure of a coil sensor assembly;
FIG. 5 is a sectional view showing the structure of the waveguide wire end tension device.
In the figure, 1, a coil sensor assembly; 10. an inner tube; 100. installing a pipe; 101. a first caulking groove; 102. an inner bore shoulder; 103. epoxy glue; 11. a reel; 110. a side plate; 111. a bobbin; 112. a threading tube; 113. a wiring board; 114. a hose; 12. a coil; 13. a locking block; 130. embedding holes; 131. damping rubber piers; 132. fastening a bolt; 133. a wiring terminal; 14. a waveguide wire; 15. a shielded wire; 16. a return line; 17. an outer tube; 170. a flange plate; 171. fixing the jackscrew; 2. a sensor probe; 20. an insulating tube; 21. a C-shaped pipe; 210. mounting grooves; 3. a waveguide wire tail end tensioning device; 31. a limiting pipe; 32. a plug; 33. a connecting seat; 330. a copper sheet; 34. a pressure spring; 4. a sensor protection tube; 40. a sleeve; 41. mounting the cylinder; 5. a buffer spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 3 and 4, a magnetostrictive liquid level gauge comprises a coil sensor assembly 1, a measuring rod and a float; the measuring rod comprises a sensor probe rod 2, a waveguide wire tail end tensioning device 3 and a sensor protective tube 4; the coil sensor assembly 1 includes an inner tube 10, a reel 11, a coil 12, a locking block 13, a waveguide wire 14, a shield wire 15, a return wire 16, and an outer tube 17; the inner tube 10 is a hollow structure with openings at both ends; the reel 11 is fixed at an opening at one end in the inner tube 10 and is arranged coaxially with the inner tube 10; the reel 11 includes two annular side plates 110 disposed opposite to each other and a spool 111 disposed coaxially with the two annular side plates 110; two ends of the bobbin 111 are fixedly connected with the two annular side plates 110 respectively; the coil 12 is wound on the bobbin 111; a threading hole is formed in the center of the bobbin 111 along the axis direction; the end, away from the reel 11, of the inner pipe 10 is coaxially provided with a mounting pipe 100, and the mounting pipe 100 is coaxially arranged with the inner pipe 10 and integrally cast and molded with the inner pipe 10; the inner diameter of the installation tube 100 is larger than the diameter of the inner tube 10, and an annular clamping edge is formed between the installation tube 100 and the inner tube 10; a first caulking groove 101 is formed at one end of the installation pipe 100, which is far away from the inner pipe 10; the locking block 13 is flat and is inserted into the first caulking groove 101 of the installation pipe 100; one end of the locking block 13 facing the installation pipe 100 is abutted against the clamping edge; a threading hole which penetrates through two ends of the locking block 13 and has an axis coincident with the axis of the mounting pipe 100 is formed in the center of the locking block 13; one end of the locking block 13 facing the reel 11 is provided with an embedding hole 130; a damping rubber pier 131 coaxial with the reel 11 is arranged between the locking block 13 and the reel 11, one end of the damping rubber pier 131 is embedded in the embedding hole 130 on the locking block 13, and the other end of the damping rubber pier 131 is abutted against the reel 11; a threading hole is formed in the damping rubber pier 131 along the axis direction; a threading pipe 112 is coaxially arranged at one end of the reel 11, which is far away from the locking block 13; a threading opening communicated with the threading hole in the bobbin 111 is formed in the threading pipe 112; the inner diameter of the thread inlet is larger than the diameter of the threading hole; a step hole is formed between the thread inlet and the threading hole in the bobbin 111; the waveguide thread 14 is arranged in the locking block 13, the damping rubber pier 131 and the threading holes of the reel 11 in a penetrating way and penetrates out of the threading pipe 112; the waveguide wire 14 is fixed with the tail end of the locking block 13; a threaded hole communicated with the threading hole in the locking block 13 is formed in the side wall of the locking block 13; a fastening bolt 132 for tightly abutting the waveguide wire 14 is screwed in the threaded hole; a connecting terminal 133 for supplying power to the reel 11 is arranged at one end of the locking block 13, which is far away from the mounting pipe 100, and the connecting terminal 133 and the locking block 13 are fixed through bolts and are electrically connected with the coil 12 on the reel 11.
Referring to fig. 3 and 4, a gap is left between both sides of the locking block 13 and the installation tube 100 and the inner tube 10; the shielding wire 15 is arranged in a gap between the locking block 13 and the installation pipe 100 and the inner pipe 10 in a penetrating way; a terminal plate 113 is fixedly connected to one end of the reel 11, which is far away from the locking block 13; the shield wire 15 is connected to the terminal block 113 through the gap between the locking block 13 and the mounting pipe 100 and the inner pipe 10 and the two side plates 110 of the reel 11; a hose 114 having an axis parallel to the axis of the reel 11 is provided above the waveguide fiber 14 between the two side plates 110 of the reel 11; the return line 16 is arranged in the hose 114 and the tail end is electrically connected with the waveguide wire 14; an inner hole shoulder 102 is convexly arranged on the inner tube 10; the inner hole shoulder 102 corresponds to one end of the reel 11 facing the locking block 13, and a side plate 110 of the reel 11 abuts against the inner hole shoulder 102; the gap between the reel 11 and the inner tube 10 is filled with epoxy resin 103.
Referring to fig. 2 and 3, the outer tube 17 is sleeved on the inner tube 10, one end of the outer tube 17 corresponding to the mounting tube 100 abuts against one end of the mounting tube 100 facing the inner tube 10, and one end of the outer tube 17 facing away from the mounting tube 100 is convexly provided with a flange plate 170; the outer wall of the outer tube 17 is provided with a threaded hole penetrating through the outer wall of the outer tube 17; a fixing jackscrew 171 for fixing the outer tube 17 and the inner tube 10 is screwed into the threaded hole.
Referring to fig. 2 and 4, the sensor probe 2 includes an insulating tube 20 and a C-shaped tube 21 sleeved on the insulating tube 20; the insulating tube 20 is a hollow tubular structure with two open ends, in this embodiment, the insulating tube 20 is made of PTFE material; the length of the insulating pipe 20 is longer than that of the C-shaped pipe 21, and one end of the insulating pipe is flush with the end part of the C-shaped pipe 21; the C-shaped pipe is made of aluminum; the C-shaped opening of the C-shaped pipe 21 and the outer wall of the insulating pipe 20 form a mounting groove 210; one end of the insulating tube 20 of the sensor probe rod 2, which is flush with the C-shaped tube 21, is inserted into an opening at one end of the outer tube 17, which is provided with the flange plate 170; the C-shaped pipe 21 and the outer pipe 17 are fixed by welding; a certain space exists between the sensor probe 2 and the inner tube 10; the waveguide wire 14 led out from the threading pipe 112 is arranged in the insulating pipe 20 in a penetrating way; the return wire 16 led out from the hose 114 is fitted in the mounting groove 210.
Referring to fig. 5, the waveguide wire end tensioning device 3 is arranged on the side of the C-shaped pipe facing away from the outer pipe 17; the waveguide wire tail end tensioning device 3 comprises a limiting pipe 31, a plug 32, a connecting seat 33 and a pressure spring 34; the limiting pipe 31 is arranged in the C-shaped pipe 21 and is fixedly connected with one end of the insulating pipe 20, which is far away from the outer pipe 17, in a coaxial line manner; the outer wall of the limiting pipe 31 is provided with a wire inlet penetrating through the outer wall of the limiting pipe 31; the return line 16 is led into the C-shaped pipe 21 from the inlet; the plug 32 is arranged in an end surface opening of one end of the C-shaped pipe 21, which is far away from the outer pipe 17; the connecting seat 33 is arranged in the C-shaped pipe 21 and is positioned between the limiting pipe 31 and the plug 32; the connecting seat 33 is connected with the C-shaped pipe 21 in a sliding manner; a copper sheet 330 is fixedly connected to the connecting seat 33; the compression spring 34 is arranged in the C-shaped pipe 21 and is positioned between the limiting pipe 31 and the connecting seat 33; two ends of the pressure spring 34 are respectively abutted against the end surface of the limiting pipe 31 and the connecting seat 33 and are always in a compressed state; the waveguide wire 14 penetrating through the insulating tube 20 and the return wire 16 introduced from the wire inlet of the limiting tube 31 respectively pass through the compression spring 34 and the connecting seat 33 and are fixedly connected to the copper sheet 330 on the connecting seat 33.
Referring to fig. 1, the sensor protection tube 4 includes a sleeve 40 and a mounting cylinder 41; the sleeve 40 is made of a metal material and has a hollow tubular structure with two open ends; the length of the sleeve 40 is equal to the length of the C-shaped pipe; the sleeve 40 mounting cylinder 41 is arranged at one end of the sleeve 40, and the axis of the sleeve 40 mounting cylinder coincides with the axis of the sleeve 40; the mounting cylinder 41 is hollow and has an opening at one end; the sleeve 40 is arranged outside the mounting cylinder 41 and fixedly connected with the closed end of the mounting cylinder 41; the closed end of the mounting cylinder 41 is provided with a mounting hole for the sensor probe 2 to pass through; the sensor probe rod 2 penetrates through a mounting hole at the closed end of the sleeve and is arranged in the sleeve 40 in a penetrating manner; the plug 32 is arranged at an opening of one end of the sleeve 40, which is far away from the mounting cylinder 41, and is inserted into the C-shaped pipe; the plug 32 is used for limiting the connecting seat 33 and plugging an end opening of the mounting tube 41; the flange plate 170 of the outer tube 17 is arranged in the mounting cylinder 41 and is attached to the closed end of the mounting cylinder 41; the flange plate 170 is provided with fixing bolts for fixing the flange plate 170 and the mounting cylinder 41; the outer wall of the sleeve is provided with threads, so that the sleeve can be conveniently installed with other equipment.
Referring to fig. 3 and 4, a buffer spring is provided in a space between the inner tube 10 and the sensor probe 2 in the outer tube 17; waveguide wire 14 and return wire 16 are threaded into the buffer spring.
The implementation principle of the embodiment is as follows: when the magnetostrictive liquid level meter is used, the sensor probe 2 is put into a liquid to be measured, then the coil 12 is electrified through the connecting terminal 133, the coil sensor assembly 1 excites pulse current at the position of the waveguide wire 14, the pulse current generates a pulse current magnetic field around the waveguide wire 14, a permanent magnetic ring is arranged in a floater matched with the magnetostrictive liquid level meter measuring rod, when the pulse current magnetic field meets the magnetic ring magnetic field generated by the floater, the magnetic field around the floater changes, so that the waveguide wire 14 made of magnetostrictive materials generates a torsional wave pulse at the position of the floater, the pulse is transmitted back along the return line 16 at a fixed speed and is detected by the coil 12, the coil 12 transmits the detected signal out through the shielding line 15, and the position of the floater can be accurately determined by measuring the time difference between the pulse current and the torsional wave, i.e. the position of the liquid surface; a pressure spring 34 in a tensioning device at the tail end of the waveguide wire 14 pushes the connecting seat 33 towards the plug 32, so that the waveguide wire 14 and the return wire 16 are always in a straightening state; the sensor probe rod 2 and the sensor protective tube 4 are produced and processed independently and then assembled together, so that the quality is controlled more easily through independent production procedures; by arranging the insulating tube 20 and the C-shaped tube 21 to be matched with each other, the waveguide wire 14 in the sensor probe rod 2 is thoroughly isolated from the return line 16, and the waveguide wire 14 at the measuring section is not contacted with any object, so that the loss of noise and signals is reduced, and the detection precision is improved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A measuring rod, characterized in that: comprises a sensor probe rod (2) and a sensor protective tube (4); the sensor probe rod (2) comprises an insulating tube (20); the waveguide wire (14) is stretched and straightly arranged in the insulating tube (20); the sensor protection tube (4) comprises a sleeve (40) sleeved outside the insulating tube (20); a plug (32) for closing the tail end opening of the sleeve (40) is arranged at the tail end of the sleeve (40); the return line (16) is arranged between the sleeve (40) and the insulating pipe (20); the end of the return wire (16) is led into the insulating tube (20) and is electrically connected with the waveguide wire (14).
2. A measuring rod according to claim 1, characterized in that: the sensor probe rod (2) further comprises a C-shaped pipe (21) sleeved outside the insulating pipe (20); an installation groove (210) is formed between the C-shaped pipe (21) and the insulating pipe (20) along the length direction of the insulating pipe (20); the return line (16) is embedded in the mounting groove (210).
3. A measuring rod according to claim 2, characterized in that: a notch penetrating through the outer wall of the C-shaped pipe (21) is formed in the outer wall of the C-shaped pipe (21) along the length direction of the C-shaped pipe (21); the mounting groove (210) is formed by a notch on the outer wall of the C-shaped pipe (21) and the outer wall of the insulating pipe (20).
4. A measuring rod according to claim 1, characterized in that: the tail end of the sensor probe rod (2) is positioned in the sensor protective tube (4) and is internally provided with a waveguide wire (14) tail end tensioning device for elastically tensioning the waveguide wire (14) and the return wire (16).
5. A measuring rod according to claim 4, characterized in that: the tail end tensioning device of the waveguide wire (14) comprises a connecting seat (33) in sliding fit with the sensor probe rod (2) and a pressure spring (34) which is arranged on one side, away from the plug (32), of the connecting seat (33) and used for extruding the connecting seat (33) towards the plug (32); the elastic direction of the pressure spring (34) is parallel to the sliding direction of the connecting seat (33); the waveguide wire (14) and the return wire (16) are tightened between the compression springs (34), and the tail ends of the waveguide wire and the return wire are respectively fixed on the connecting seat (33).
6. A measuring rod according to claim 5, characterized in that: the wave guide wire (14) tensioning device further comprises a limiting pipe (31) coaxially arranged at the tail end of the sensor probe rod (2); two ends of the pressure spring (34) are respectively abutted against the end faces of the connecting seat (33) and the limiting pipe (31); the return line (16) penetrates through the outer wall of the limiting pipe (31) and the pressure spring (34) and is fixed on the connecting seat (33).
7. A measuring rod according to claim 5, characterized in that: a copper sheet (330) is fixedly connected to the connecting seat (33); the return line (16) and the waveguide wire (14) are respectively fixedly connected with two ends of the copper sheet (330).
8. A magnetostrictive liquid level gauge, characterized in that: comprising a measuring rod according to any of claims 1-6; the device also comprises a coil (12) sensor and a floater matched with the measuring rod; the coil (12) sensor comprises an inner tube (10), a reel (11) coaxially arranged in the inner tube (10), a coil (12) wound on the reel (11), a locking block (13) arranged at an opening of one end of the inner tube (10) far away from the reel (11), a shielding wire (15) with one end electrically connected with the output end of the coil (12) and the other end penetrating through the locking block (13), and an outer tube (17) sleeved outside the inner tube (10) and fixed with the inner tube (10); damping rubber piers (131) with two ends respectively abutted against the reel (11) and the locking block (13) are arranged between the reel (11) and the locking block (13); the return line (16) penetrates through the locking block (13), the damping rubber pier (131) and the reel (11) and is positioned in the measuring rod; a hose (114) with the axis parallel to the axis of the reel (11) is arranged above the reel (11), and the return line (16) is arranged in the hose (114) in a penetrating way; a permanent magnetic ring is arranged in the floater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020885221.2U CN212206279U (en) | 2020-05-23 | 2020-05-23 | Magnetostrictive liquid level meter and measuring rod thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020885221.2U CN212206279U (en) | 2020-05-23 | 2020-05-23 | Magnetostrictive liquid level meter and measuring rod thereof |
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| CN212206279U true CN212206279U (en) | 2020-12-22 |
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| CN202020885221.2U Active CN212206279U (en) | 2020-05-23 | 2020-05-23 | Magnetostrictive liquid level meter and measuring rod thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857534A (en) * | 2021-01-21 | 2021-05-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
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2020
- 2020-05-23 CN CN202020885221.2U patent/CN212206279U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857534A (en) * | 2021-01-21 | 2021-05-28 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
| CN112857534B (en) * | 2021-01-21 | 2022-04-01 | 北京斯克维思仪表有限公司 | Magnetostrictive liquid level meter and flexible probe rod |
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