CN112197823A - Intelligent electromagnetic flow sensor - Google Patents
Intelligent electromagnetic flow sensor Download PDFInfo
- Publication number
- CN112197823A CN112197823A CN202010846050.7A CN202010846050A CN112197823A CN 112197823 A CN112197823 A CN 112197823A CN 202010846050 A CN202010846050 A CN 202010846050A CN 112197823 A CN112197823 A CN 112197823A
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- Prior art keywords
- buret
- flow sensor
- heating box
- electromagnetic flow
- filter disc
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
- G01F15/125—Filters
Abstract
The invention discloses an intelligent electromagnetic flow sensor, which relates to the technical field of electromagnetic flow sensors and comprises a measuring tube, a heating box, excitation coils, a connecting tube and a converter, wherein the heating box is fixedly arranged at the bottom of the measuring tube, the two excitation coils are respectively and fixedly arranged at the top and the bottom of the measuring tube and can generate a constant magnetic field on the cross section of the measuring tube, an induction electrode is also fixedly arranged on the measuring tube and can induce charged particles in fluid, the induction electrode is connected with the converter through the connecting tube, the converter is fixedly arranged on the measuring tube through the connecting tube, and the converter adopts a high-performance microprocessor. The functions are various, and the economic value is high.
Description
Technical Field
The invention relates to the technical field of electromagnetic flow sensors, in particular to an intelligent electromagnetic flow sensor.
Background
The electromagnetic flow sensor is a novel flow measuring instrument which is rapidly developed along with the development of electronic technology in 50-60 years of the 20 th century, the electromagnetic flow sensor applies the electromagnetic induction principle, an instrument for measuring the flow of a conductive fluid based on the electromotive force induced by the conductive fluid passing through an externally applied magnetic field, an electromagnetic flow sensor designed according to Faraday's law of electromagnetic induction, a pair of detection electrodes are arranged on the wall of the measuring tube, the axis of which is vertical to the magnetic force line of the magnetic field, when the conductive liquid is in the alternating magnetic field along the measuring tube, when the sensor moves in the direction vertical to the magnetic force line, the conductive liquid cuts the magnetic force line to generate induced electromotive force, which is a mature sensor at present, however, in the actual use process, the existing intelligent electromagnetic flow sensor is found to have an incomplete overall structure, and the problems of poor anti-freezing effect, easy blockage and inconvenient cleaning still exist.
Disclosure of Invention
The invention aims to provide an intelligent electromagnetic flow sensor to solve the problems of poor anti-freezing effect, easiness in blockage and inconvenience in cleaning in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: intelligent electromagnetic flow sensor, including survey buret, heating box, excitation coil, connecting pipe and converter, heating box fixed mounting is in survey buret bottom, two excitation coil difference fixed mounting be in survey the top and the bottom of buret can produce the constant magnetic field on the cross section of buret, still fixed mounting has the response electrode on surveying the buret, can respond to the electrified particle in the fluid, the response electrode passes through the connecting pipe with the converter is connected, the converter passes through connecting pipe fixed mounting is on survey the buret, the converter adopts high performance microprocessor, the xLCD shows, and the parameter setting is convenient, and the programming is reliable, the excitation coil, the converter with the response electrode is basic principle component part in the invention, the movable mounting has multi-functional filter disc in the buret, play basic filter effect, fixed mounting has sealed lid on the survey buret, and is convenient taking out of multi-functional filter disc clears up, the heating box has soft pipe through flexible union coupling, soft pipe one end with multi-functional filter disc intercommunication can do multi-functional filter disc provides water, survey buret one side and be provided with power plug through the power cord.
Preferably, a winding mechanism is fixedly installed in the measuring tube, two connecting wires are fixedly arranged on the winding mechanism and are respectively connected with the two multifunctional filter discs on two sides, and the connecting wires are wound by using the winding motor and are further controlled to be connected with the connecting wires.
Preferably, the intraductal back-pull fixed block that still welds of measuring, back-pull fixed block pass through the spring with multi-functional filter disc connects, through back-pull fixed block with basic back-pull effect is realized in the cooperation of spring, with the rolling effect cooperation use control of winding mechanism the position control of multi-functional filter disc, winding mechanism includes driving motor and take-up pulley, the take-up pulley is installed on driving motor's the output shaft, the connecting wire is fixed on the take-up pulley, through driving motor control the take-up pulley rotates, and then right the take-up pulley is connected the connecting wire carries out rolling control.
Preferably, a motor is fixedly installed on one side of the heating box, a rotating screw is installed on an output shaft of the motor, a sealing plate is movably installed in the heating box, the sealing plate is installed on the rotating screw, a sealing ring is arranged on the outer side of the sealing plate, and the rotating screw is controlled to rotate by the motor, so that the position of the sealing plate connected with the rotating screw is adjusted.
Preferably, an electric heating rod is fixedly mounted on one side of the heating box, a basic heating effect can be achieved, the rotating screw rod comprises a single central rod and two threaded rods, the two threaded rods are fixedly mounted on two sides of the central rod respectively, the thread directions of the two threaded rods are opposite, and the whole rotating directions are the same when the rotating screw rod rotates, so that the sealing plates mounted on the two threaded rods can be far away from or close to each other when the heating box is used, and hot water in the heating box is controlled to be discharged.
Preferably, limiting plates are welded on two sides of the central rod, the sealing plates can be prevented from entering regions without threads to influence use, water feeding pipes are arranged at the tops of two sides of the heating box in a penetrating mode, one-way valves are arranged in the water feeding pipes, and sufficient water is added into the heating box through the water feeding pipes to serve as heating media.
Preferably, a filter tank is arranged in the multifunctional filter disc, a first filter screen and a second filter screen are respectively installed on two sides of the filter tank, a conical feed inlet is formed in the first filter screen, a basic filtering effect is achieved through the first filter screen and the second filter screen, and the conical feed inlet can enable solid impurities between the first filter screen and the second filter screen to be separated easily, so that subsequent concentrated cleaning is facilitated.
Preferably, the annular chamber of leading to water has been seted up in the multi-functional filter disc, the slant spray pipe is worn to be equipped with to annular chamber one side of leading to water, install the pressure valve in the slant spray pipe, the incline direction orientation of slant spray pipe can break through the pressure valve after water pressure increases to a certain degree, and water follows the slant spray pipe blowout, thereby it is right the inner wall of surveying buret is cleared up, the fixed clearance cotton that is provided with in outside side of multi-functional filter disc can advance further mill off to stubborn spot after the clearance, improves the clearance effect.
Preferably, the fixed sealed pad that is provided with of interior limit side of sealed lid guarantees the sealed basic sealed effect of lid, all welded the gusset plate in sealed lid bottom both sides, the draw-in groove has been seted up to the outside side of surveying buret, the thickness of draw-in groove with the thickness of gusset plate is the same, ensures the block that the gusset plate can be firm is in the draw-in groove, and the outward appearance is more pleasing to the eye.
Preferably, wear to be equipped with fixing bolt in the gusset plate, set up the thread groove in the survey buret, sealed lid passes through fixing bolt with the cooperation of thread groove is installed survey on the buret, through fixing bolt with the cooperation of thread groove can make sealed lid dismantle convenient and fast more.
The invention has the technical effects and advantages that:
1. the multifunctional filter disc has a good anti-freezing effect, the overall temperature of the multifunctional filter disc can be effectively improved by introducing hot water into the multifunctional filter disc, and fluid can be heated when passing through the multifunctional filter disc, so that the anti-freezing effect is achieved.
2. The multifunctional filter disc achieves basic filtering effect, and after the multifunctional filter disc is used for a period of time, the sealing cover can be taken down and the multifunctional filter disc can be flexibly taken out for cleaning.
3. The multifunctional filter disc also has an inner wall cleaning function, the multifunctional filter disc can spray water to the inner wall of the measuring pipe on one side by pressurizing the multifunctional filter disc, the cleaning function is realized, the functions are various, and the economic value is high.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Figure 2 is a schematic view of a heating cartridge according to the present invention.
Fig. 3 is a side sectional view of the multifunctional filter disk of the present invention.
Fig. 4 is a front sectional view of the multifunctional filter disk of the present invention.
Fig. 5 is a schematic view showing an external structure of a sealing cap according to the present invention.
In the figure: 1. a measurement tube; 2. a heating cartridge; 3. a field coil; 4. an induction electrode; 5. a connecting pipe; 6. a converter; 7. a multifunctional filter disc; 8. a sealing cover; 9. a telescopic pipe; 10. a soft catheter; 11. an electrical heating rod; 12. an electric motor; 13. a sealing plate; 14. a center pole; 15. a threaded rod; 16. a limiting plate; 17. a water through cavity; 18. cleaning cotton; 19. a filter tank; 20. a second filter screen; 21. a first filter screen; 22. a conical feed inlet; 23. a gasket; 24. a reinforcing plate; 25. fixing the bolt; 26. a winding mechanism; 27. pulling back the fixed block; 28. a spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an intelligent electromagnetic flow sensor as shown in figures 1-5, which comprises a measuring tube 1, a heating box 2, excitation coils 3, a connecting tube 5 and a converter 6, wherein the heating box 2 is fixedly arranged at the bottom of the measuring tube 1, the two excitation coils 3 are respectively fixedly arranged at the top and the bottom of the measuring tube 1 and can generate a constant magnetic field on the cross section of the measuring tube 1, an induction electrode 4 is also fixedly arranged on the measuring tube 1 and can induce charged particles in fluid, the induction electrode 4 is connected with the converter 6 through the connecting tube 5, the converter 6 is fixedly arranged on the measuring tube 1 through the connecting tube 5, the converter 6 adopts a 16-bit high-performance microprocessor and a 2x16LCD display, the parameter setting is convenient, the programming is reliable, the excitation coils 3, the converter 6 and the induction electrodes 4 are basic principle components in the invention, a multifunctional filter disc 7, play basic filter effect, survey fixed mounting has sealed lid 8 on the buret 1, makes things convenient for taking out the clearance of multi-functional filter disc 7, and heating box 2 is connected with soft pipe 10 through flexible pipe 9, and soft pipe 10 one end and multi-functional filter disc 7 intercommunication can provide water for multi-functional filter disc 7, survey 1 one side of buret and be provided with power plug through the power cord.
In this embodiment, as shown in fig. 1, a winding mechanism 26 is fixedly installed in the measuring tube 1, two connecting wires are fixedly installed on the winding mechanism 26, the two connecting wires are respectively connected to the two multifunctional filter discs 7 on both sides, and the winding motor is used to wind the connecting wires, thereby controlling the positions of the multifunctional filter discs 7 connected to the connecting wires.
In this embodiment, as shown in fig. 1 specifically, a pull-back fixing block 27 is further welded in the measuring tube 1, the pull-back fixing block 27 is connected to the multifunctional filter disc 7 through a spring 28, a basic pull-back effect is realized through the cooperation of the pull-back fixing block 27 and the spring 28, the position adjustment of the multifunctional filter disc 7 is controlled in cooperation with the winding effect of the winding mechanism 26, the winding mechanism 26 includes a driving motor and a winding wheel, the winding wheel is installed on an output shaft of the driving motor, a connecting wire is fixed on the winding wheel, the winding wheel is controlled to rotate through the driving motor, and then winding control is performed on the connecting wire connected to the winding wheel.
In the present embodiment, as shown in fig. 2, a motor 12 is fixedly installed on one side of the heating box 2, a rotating screw is installed on an output shaft of the motor 12, a sealing plate 13 is movably installed in the heating box 2, the sealing plate 13 is installed on the rotating screw, a sealing ring is installed on an outer side of the sealing plate 13, and the rotating screw is controlled by the motor 12 to rotate, so that the position of the sealing plate 13 connected with the rotating screw is adjusted.
In this embodiment, as shown in fig. 2 in particular, the electric heating rod 11 is fixedly installed on one side of the heating box 2, so that a basic heating effect can be achieved, the rotating screw includes a single central rod 14 and two threaded rods 15, the two threaded rods 15 are respectively and fixedly installed on two sides of the central rod 14, the thread directions on the two threaded rods 15 are opposite, the thread directions of the two threaded rods 15 are opposite, but the overall rotating directions are the same when rotating, so that the sealing plates 13 installed on the two threaded rods 15 can be far away from or close to each other when in use, so as to control the discharge of hot water in the heating box 2.
In this embodiment, as shown in fig. 2 specifically, limiting plates 16 are welded on both sides of the central rod 14, so that the sealing plate 13 can be prevented from entering the unthreaded area to influence the use, water feeding pipes are arranged on the tops of both sides of the heating box 2 in a penetrating manner, one-way valves are arranged in the water feeding pipes, and sufficient water is added into the heating box 2 through the water feeding pipes to serve as a heating medium.
In this embodiment, as shown in fig. 3 and 4 specifically, a filtering groove 19 is formed in the multifunctional filter disc 7, a first filter screen 21 and a second filter screen 20 are respectively installed on two sides of the filtering groove 19, a tapered feeding hole 22 is formed in the first filter screen 21, a basic filtering effect is realized through the first filter screen 21 and the second filter screen 20, and the arrangement of the tapered feeding hole 22 enables solid impurities entering between the first filter screen 21 and the second filter screen 20 not to easily break away from the filtering groove, so that subsequent centralized cleaning is facilitated.
In this embodiment, as shown in fig. 3 and 4 specifically, an annular water passing cavity 17 is formed in the multifunctional filter disc 7, an inclined water spraying pipe is arranged on one side of the annular water passing cavity 17 in a penetrating manner, a pressure valve is installed in the inclined water spraying pipe, the inclined direction of the inclined water spraying pipe faces the inner wall of the measuring pipe 1, the pressure valve can be broken through when the water pressure is increased to a certain degree, water is sprayed out from the inclined water spraying pipe, the inner wall of the measuring pipe 1 is cleaned, the outer side of the multifunctional filter disc 7 is fixedly provided with cleaning cotton 18, the cleaned stubborn stains can be further ground, and the cleaning effect is improved.
In this embodiment, as shown in fig. 5, the sealing gasket 23 is fixedly disposed on the inner side of the sealing cover 8, so as to ensure the basic sealing effect of the sealing cover 8, the reinforcing plates 24 are welded on two sides of the bottom of the sealing cover 8, the clamping groove is formed in the outer side of the measuring pipe 1, the thickness of the clamping groove is the same as that of the reinforcing plate 24, the reinforcing plate 24 can be firmly clamped in the clamping groove, and the appearance is more attractive.
In this embodiment, as shown in fig. 5 specifically, fixing bolt 25 is penetrated in reinforcing plate 24, a thread groove is formed in measuring pipe 1, sealing cover 8 is installed on measuring pipe 1 through the cooperation of fixing bolt 25 and thread groove, and the removal of sealing cover 8 can be made more convenient and faster through the cooperation of fixing bolt 25 and thread groove.
The working principle of the invention is as follows: when the invention is used, firstly, the invention is connected with a pipeline to be measured, so that water flow enters from one side of a first filter screen 21, then a power plug is connected with an external power supply to provide electric energy for each electric appliance of the invention, two excitation coils 3 can generate a constant magnetic field on the cross section of a measuring pipe 1 in the use process, an induction electrode 4 can induce charged particles in fluid, and data conversion is realized through a converter 6 to finish measurement, the invention is a basic structure of the prior technical principle, and is different from a traditional electromagnetic flow sensor in that a heating box 2 and a multifunctional filter disc 7 are arranged in the invention, the water can be heated through the heating box 2, and the heating box 2 and the multifunctional filter disc 7 are in a communicated structure and can be used for heating the multifunctional filter disc 7 to further heat the space in the measuring pipe 1, so that a certain anti-freezing effect is achieved, simultaneously multi-functional filter disc 7 can be in the position of controlling multi-functional filter disc 7 under the cooperation of pullback fixed block 27, spring 28 and winding mechanism 26, sprays water when multi-functional filter disc 7 removes and realizes the clearance effect, still can take off sealed lid 8 after using a period and clear up, and whole filter effect is good, convenient clearance, and practical value is high.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. Intelligence electromagnetic flow sensor, including surveying buret (1), heating box (2), excitation coil (3), connecting pipe (5) and converter (6), its characterized in that: heating box (2) fixed mounting in survey buret (1) bottom, two excitation coil (3) fixed mounting respectively in the top and the bottom of surveying buret (1) can be in produce the constant magnetic field on the cross section of surveying buret (1), still fixed mounting has induction electrode (4) on surveying buret (1), can respond to the electrified particle in the fluid, induction electrode (4) through connecting pipe (5) with converter (6) are connected, converter (6) pass through connecting pipe (5) fixed mounting in survey buret (1), converter (6) adopt 16 high performance microprocessor, 2x16LCD demonstration, and the parameter setting is convenient, and the programming is reliable, excitation coil (3), converter (6) and induction electrode (4) are basic principle component part in the invention, survey buret (1) interior movable mounting has multi-functional filter disc (7), plays basic filter effect, fixed mounting has sealed lid (8) on surveying buret (1), and is convenient the clearance of taking out of multi-functional filter disc (7), heating box (2) are connected with soft pipe (10) through flexible pipe (9), soft pipe (10) one end with multi-functional filter disc (7) intercommunication can do multi-functional filter disc (7) provide water, survey buret (1) one side and be provided with power plug through the power cord.
2. The intelligent electromagnetic flow sensor of claim 1, wherein: survey buret (1) internal fixed mounting has spiral mechanism (26), fixed being provided with two connecting wires on spiral mechanism (26), two the connecting wire is respectively with two of both sides multi-functional filter disc (7) are connected, utilize the spiral motor is right the connecting wire carries out the rolling, and then control with the connecting wire is connected the position of multi-functional filter disc (7).
3. The intelligent electromagnetic flow sensor of claim 2, wherein: go back the welding in survey buret (1) and have pull-back fixed block (27), pull-back fixed block (27) through spring (28) with multi-functional filter disc (7) are connected, through pull-back fixed block (27) with the basic effect of pulling back is realized in the cooperation of spring (28), with the rolling effect cooperation use control of winding mechanism (26) the position control of multi-functional filter disc (7), winding mechanism (26) include driving motor and reel, the reel is installed on driving motor's the output shaft, the connecting wire is fixed on the reel, through driving motor control the reel rotates, and then is right the reel is connected the connecting wire carries out rolling control.
4. The intelligent electromagnetic flow sensor of claim 1, wherein: heating box (2) one side fixed mounting has motor (12), install on the output shaft of motor (12) and rotate the screw rod, movable mounting has closing plate (13) in heating box (2), closing plate (13) are installed rotate on the screw rod, the outside side of closing plate (13) is provided with the sealing washer, through motor (12) control rotate the screw rod and rotate, thereby right with it is connected to rotate the screw rod the position of closing plate (13) is adjusted.
5. The intelligent electromagnetic flow sensor of claim 4, wherein: the heating box (2) is characterized in that an electric heating rod (11) is fixedly mounted on one side of the heating box (2), a basic heating effect can be achieved, the rotating screw rod comprises a single central rod (14) and two threaded rods (15), the two threaded rods (15) are respectively and fixedly mounted on two sides of the central rod (14), the thread directions of the two threaded rods (15) are opposite, but the whole rotating directions are the same when the rotating screw rod rotates, so that the sealing plates (13) mounted on the two threaded rods (15) can be far away from or close to each other when the rotating screw rod is used, and hot water in the heating box (2) is controlled to be discharged.
6. The intelligent electromagnetic flow sensor of claim 5, wherein: all welded with limiting plate (16) in well core rod (14) both sides, can prevent closing plate (13) get into the regional influence that does not have the screw and use, the filler pipe is all worn to be equipped with at the both sides top of heating box (2), be provided with the check valve in the filler pipe, through the filler pipe to add the water of capacity as heating medium in heating box (2).
7. The intelligent electromagnetic flow sensor of claim 1, wherein: seted up filter tank (19) in multi-functional filter disc (7), first filter screen (21) and second filter screen (20) are installed respectively to filter tank (19) both sides, toper feed inlet (22) have been seted up on first filter screen (21), through first filter screen (21) with basic filter effect is realized to second filter screen (20), setting up of toper feed inlet (22) can make the entering first filter screen (21) with solid impurity between second filter screen (20) can not break away from easily, makes things convenient for subsequent concentrated clearance.
8. The intelligent electromagnetic flow sensor of claim 7, wherein: seted up annular chamber (17) that leads to in multi-functional filter disc (7), the annular chamber (17) that leads to wears to be equipped with the slant spray pipe in one side, install the pressure valve in the slant spray pipe, the incline direction orientation of slant spray pipe survey the inner wall of buret (1), can break through the pressure valve after water pressure increases to certain degree, water is followed the slant spray pipe blowout, thereby it is right survey the inner wall of buret (1) and clear up, the fixed clearance cotton (18) that is provided with in outside side of multi-functional filter disc (7) can advance further mill removal to stubborn spot after the clearance, improves the clearance effect.
9. The intelligent electromagnetic flow sensor of claim 1, wherein: fixed sealed pad (23) that is provided with of interior limit side of sealed lid (8), guarantees sealed lid (8) basic sealed effect, all welded gusset plate (24) in sealed lid (8) bottom both sides, survey the outside side of buret (1) and open and be equipped with the draw-in groove, the thickness of draw-in groove with the thickness of gusset plate (24) is the same, ensures the block that gusset plate (24) can be firm is in the draw-in groove, and the outward appearance is more pleasing to the eye.
10. The intelligent electromagnetic flow sensor of claim 9, wherein: wear to be equipped with fixing bolt (25) in gusset plate (24), set up the thread groove in surveying buret (1), sealed lid (8) pass through fixing bolt (25) with the cooperation of thread groove is installed survey buret (1) is last, through fixing bolt (25) with the cooperation of thread groove can make the dismantlement of sealed lid (8) convenient and fast more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010846050.7A CN112197823A (en) | 2020-08-21 | 2020-08-21 | Intelligent electromagnetic flow sensor |
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| CN202010846050.7A CN112197823A (en) | 2020-08-21 | 2020-08-21 | Intelligent electromagnetic flow sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893622A (en) * | 2021-09-10 | 2022-01-07 | 叶思成 | Centrifugal gas multistage filter device |
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