Electromagnetic flowmeter for mine

Abstract

The invention relates to the field of flow metering, in particular to a mine electromagnetic flowmeter which comprises a shell, a lining and an electrode, the lining is arranged in the shell, the electrode is rotatably mounted in the lining, a water storage cavity is formed in the shell, a water spraying opening communicated with the water storage cavity is formed in the lining, the water spraying opening faces the electrode, and the water spraying opening is communicated with the water storage cavity. And the water storage cavity is connected with an energy storage device. The electrode is driven to rotate by flowing water flow in a pipeline, so that multiple sides of the electrode can be flushed by the water flow, energy and water are stored by water pressure, stored energy is released when the water flow stops, and water is drained and stored through the released energy to flush dirt remaining on the electrode, so that the scaling speed of the electrode is slowed down, and the cleaning frequency of the electrode is reduced; the problems that the electrode scaling speed of the mine electromagnetic flowmeter is high, the electrode cleaning period is frequent, electrode abrasion is accelerated, the electrode corrosion rate is increased, and the service life of the mine electromagnetic flowmeter and the electrode measurement accuracy are affected are solved.

Description

Technical Field

[0001] This invention relates to the field of flow measurement technology, specifically to an electromagnetic flow meter for use in mining. Background Technology

[0002] Electromagnetic flowmeters are used to accurately measure fluids in pipeline transportation systems. They are classified into general-purpose, explosion-proof, sanitary, and submersible types, with different types used depending on the environment of the application. An electromagnetic flowmeter contains two excitation coils to generate a constant magnetic field. The conductive medium flowing in the pipeline cuts through the magnetic field, causing electrodes on the inner wall of the pipe to measure voltage changes, from which the flow rate can be calculated. However, when scale forms on the pipe wall and electrode surfaces, short circuits occur between the electrodes, causing changes in current and introducing measurement errors. In ordinary water treatment systems, scale buildup on the electrodes of electromagnetic flowmeters can cause measurement errors. In mining electromagnetic flowmeters, which typically measure media such as mine wastewater, ore leachate, sludge, and oil, scale buildup on the electrodes is rapid, frequently leading to inaccurate measurements. Therefore, electromagnetic flowmeters used in mining require regular scale removal to ensure measurement accuracy.

[0003] Traditional methods for dealing with electrode scaling include manually disassembling the electromagnetic flowmeter for cleaning, but this is inefficient, especially in mining applications where electromagnetic flowmeters scale rapidly and have short cleaning cycles. Frequent disassembly and reassembly are time-consuming and labor-intensive, increasing assembly errors and the risk of pipeline leaks. To address this issue, existing technology includes scraper-type electrode electromagnetic flowmeters that can descale the electrodes without disassembly. These electrodes are hollow, and a stainless steel scraper with a thin shaft is guided to the electrode surface through the hollow electrode. When the thin shaft is rotated from the outside, the scraper rotates in close contact with the electrode's end face, thus scraping away the scale. However, in mining applications, electromagnetic flowmeters require frequent cleaning. During the scraping process, the high frequency of friction between the scraper and the electrode leads to accelerated electrode wear and increased corrosion rates, ultimately affecting the lifespan of the electromagnetic flowmeter and the accuracy of electrode measurements.

[0004] Therefore, in order to reduce the cleaning frequency of the electrodes without damaging them and to improve their service life, an electromagnetic flowmeter for mining is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic flowmeter for mining applications. To address the issue of electrode damage caused by frequent descaling of the electrodes, which affects the lifespan of the electrodes and the measurement accuracy of the electromagnetic flowmeter, this invention utilizes the flowing water in the pipeline to drive the electrodes to rotate, ensuring that multiple sides of the electrodes are flushed by the water flow. It also utilizes water pressure to store energy and water, releasing the stored energy when the water flow stops. This released energy is used to drain the stored water and flush away any remaining dirt on the electrodes, thereby slowing down the rate of electrode scaling. This reduces the frequency of electrode cleaning, thus avoiding electrode damage caused by frequent cleaning and ensuring the lifespan of the electrodes and the measurement accuracy of the electromagnetic flowmeter.

[0006] An electromagnetic flowmeter for mining includes a housing, a lining, and electrodes. The lining is disposed inside the housing, and the electrodes are rotatably mounted inside the lining. A water storage chamber is provided on the housing, and a water spray nozzle communicating with the water storage chamber is provided on the lining, with the water spray nozzle facing the electrodes. An energy storage device is connected to the water storage chamber, and a driving device is provided on the electrodes. The driving device drives the electrodes to rotate by water flow power, causing the water storage chamber to store water, and controls the energy storage device to store energy. The energy storage device releases energy after the water flow stops, causing the water in the water storage chamber to be discharged from the water spray nozzle.

[0007] By setting up a drive device, the electrodes are driven to rotate using water flow power, allowing them to rotate evenly. This ensures that multiple sides of the electrodes are flushed by the water flow, and the high-speed water flow prevents scale formation, thus reducing the frequency of scale buildup on the electrodes. This reduces the frequency of electrode maintenance, extends the electrode's lifespan, and ensures the measurement accuracy of the electromagnetic flowmeter. During operation, the drive device stores water in the storage chamber. Relying on the energy storage device, energy is released after the water flow stops, and this energy drives the water flow out from the nozzle to flush the electrodes. This prevents impurities from condensing and forming scale on the electrodes after the water flow stops, which would increase the frequency of electrode maintenance and affect the electrode's lifespan.

[0008] Preferably, the driving device includes an impeller, an outlet, an inlet, a baffle, a one-way component, a flattened sphere, a connecting rod, and a control switch. An impeller is fixedly mounted on one end of the electrode and is located inside the water storage chamber. The inner wall of the lining has an inlet and an outlet communicating with the water storage chamber, and the electrode is located between the outlet and the inlet. A filter screen is installed in the lining at the inlet. A one-way component is provided on the housing, allowing water to enter from the inlet but preventing water from flowing out. The baffle is hinged to the inner wall of the lining via a torsion spring. The baffle is shaped like a quarter sphere and partially encloses the outlet. The inlet, baffle, and outlet are axially arranged along the water flow direction. A flattened sphere is located inside the outlet. A connecting rod connects the baffle and the flattened sphere. A control switch is connected to the spray nozzle, and the control switch opens the spray nozzle when the energy storage device is triggered or the water flow stops.

[0009] By installing a baffle that partially encloses the outlet, the outlet is positioned on the side of the baffle facing away from the water flow. During water flow, a negative pressure is generated on the side of the baffle facing away from the water flow, creating a pressure difference between the outlet and the inlet. This forces water into the storage chamber, driving the impeller to rotate and ensuring uniform electrode rotation. This reduces the frequency of electrode scaling and minimizes the need for electrode cleaning. The water flows along the inside of the storage chamber, preventing turbulence at the electrode detection area from affecting the electromagnetic flowmeter's detection. Furthermore, the electrode is located between the outlet and inlet, and the inlet, baffle, and outlet are axially arranged along the water flow direction. This ensures that turbulence generated at the baffle does not affect the electrode's current sensing, thus guaranteeing... The accuracy of the electromagnetic flowmeter is improved by using a unidirectional component to prevent water from flowing out of the inlet. A flat sphere is installed at the outlet, connected to a baffle by a connecting rod. When water flows, the baffle rotates under the impact of the water flow, squeezing the flat sphere to open the outlet. A control switch controls the opening and closing of the spray nozzle. Therefore, after the water flow stops, water cannot flow out of the storage chamber, thus achieving the water storage function. The filter screen ensures that the stored water is filtered, reducing impurities. Using filtered water to rinse the electrodes reduces impurity adhesion, thus reducing scale formation, decreasing electrode cleaning frequency, and increasing electrode lifespan.

[0010] Preferably, the energy storage device includes a push plate, a pressure relief port, and a float switch. The push plate is slidably installed inside the water storage chamber and is connected to the outer shell through a storage spring. The push plate divides the water storage chamber into a positive pressure chamber and a negative pressure chamber. The spring is located inside the negative pressure chamber. The pressure relief port is set on the lining and is connected to the negative pressure chamber. The horizontal height of the pressure relief port is 1-2 cm less than the horizontal height of the electrode. A float switch is set on the inner wall of the lining at the pressure relief port.

[0011] Preferably, a ratchet is rotatably mounted on the inner wall of the water storage chamber via a coil spring; a float connecting rod is rotatably connected to the double-ended float; a sliding sleeve is threaded onto the inner wall of the housing; a sliding connecting rod is slidably mounted inside the sliding sleeve; the sliding connecting rod is rotatably connected to the float connecting rod; a sliding sleeve is connected to the end of the sliding connecting rod away from the float connecting rod; a ratchet rack that engages with the ratchet is slidably connected to the sliding sleeve; one end of the ratchet rack is rotatably connected to the push plate; a transmission gear is coaxially and unidirectionally mounted on the ratchet; and a gear set is connected between the transmission gear and the electrode.

[0012] By setting up a push plate, which is rotatably connected to a ratchet rack, which is connected to a control switch, and the ratchet rack is connected to a ratchet wheel, which is connected to a coil spring on the inner wall of the water storage chamber, when water flows into the pipe, the control switch causes the ratchet rack to contact the ratchet wheel. When water is stored in the water storage chamber, the push plate is compressed by the water pressure, which drives the ratchet rack. The ratchet rack drives the ratchet wheel, thus tightening the coil spring and storing force. After the water flow in the pipe stops, the push plate squeezes the water in the water storage chamber, thereby squeezing as much water as possible out of the nozzle, increasing the time for rinsing the electrode and slowing down the scaling rate of the electrode. A pressure relief port and a float switch are set in the water storage chamber, and the horizontal height of the pressure relief port is 1-2 cm lower than the horizontal height of the electrode, thus dividing the water storage chamber into a positive pressure chamber and a negative pressure chamber. When the water flow height in the pipe is higher than the pressure relief port, the float switch is closed, and the push plate does not move due to the negative pressure. When the water flow height in the pipe is lower than the electrode, ... When the float switch is activated, the negative pressure chamber connects to the atmosphere, the push plate begins to move, disengaging from the ratchet rack. The coil spring releases, providing power to the gear set via the transmission gears. The design of the pressure relief port and float switch allows for water spraying only when the electrode is fully exposed above the water surface, preventing ineffective cleaning of the electrode while it is submerged, which can lead to scale buildup and increased cleaning frequency. The coil spring, when the water storage chamber is filled, accumulates power through the rotation of the ratchet. During water spraying, the coil spring releases, driving the impeller on the electrode to rotate via the gear set. This pressurizes the water storage chamber, pushing the nozzle out of the spray outlet. The increased water pressure enhances the rinsing effect, improving the efficiency of cleaning dirt from the electrode surface. Furthermore, the rotation of the impeller also drives the electrode to rotate, thus cleaning the electrode from all angles, improving cleaning effectiveness, reducing electrode maintenance frequency, and extending electrode lifespan.

[0013] Preferably, the control switch includes a double-headed float, a float rocker arm, a nozzle, and a nozzle connecting rod. The nozzle is slidably installed inside the spray nozzle. One end of the nozzle near the water storage chamber is rotatably connected to the nozzle connecting rod. One end of the float rocker arm is hinged to the inner wall of the water storage chamber. The nozzle connecting rod is rotatably connected to the float rocker arm. One end of the float rocker arm is rotatably connected to the double-headed float. The nozzle is provided with multiple nozzles and communicates with the water storage chamber. A ball bearing is provided inside the nozzle, and the ball bearing is in clearance fit inside the nozzle. The nozzles are evenly distributed pointing towards the electrodes.

[0014] By designing a nozzle that slides inside the water nozzle to enable its telescopic function, the accuracy of electrode cleaning is improved, thus enhancing the cleaning effect. Multiple nozzles expand the electrode rinsing area, strengthening the cleaning of dead corners and reducing residual impurities on the electrode surface. Furthermore, ball bearings inside the nozzles accelerate the water flow, further improving the rinsing effect and reducing residue, thus decreasing the cleaning frequency. The nozzles are evenly distributed and directed towards the electrode, ensuring no rinsing dead corners and preventing residual deposits from affecting measurement accuracy.

[0015] Preferably, the float rocker arm is hinged to the inner wall of the water storage cavity, the end face of the nozzle at one end of the lining is an arc surface, and the radius of the arc surface is equal to that of the inner wall of the lining. The tangent of the nozzle along the electrode axis is arc-shaped, and the projected width of the arc in the direction of gravity is 0.5-1cm greater than the electrode diameter. When water flows into the pipe, when the double-headed float floats to the highest point, the arc surface of the nozzle end face matches the arc surface of the inner wall of the lining.

[0016] By setting the nozzle end face to an arc-shaped surface that matches the lining, there is no protrusion on the inner wall of the lining when the nozzle retracts, ensuring no turbulence is generated at the electrode measurement position, thus avoiding affecting the accuracy of the electrode measurement results. By setting the cross-section of the nozzle along the electrode axis to be arc-shaped, and the projection width of this arc in the direction of gravity is greater than the electrode diameter by 0.5-1cm, the electrode can be completely covered after the nozzle is extended. This ensures that when the nozzle stops spraying water, the water droplets remaining on the inner wall of the pipe will not slide onto the cleaned electrode below the nozzle, thus preventing scale formation on the electrode surface due to the evaporation of residual liquid, reducing the frequency of electrode cleaning and ensuring the accuracy of electrode measurement.

[0017] Preferably, the unidirectional component includes a water-blocking rotating arm, a water-passing rotating arm, a spring, a positioning pin, and a base. The base is located below the housing and has a water inlet channel. The water inlet is connected to the water storage chamber through the water inlet channel. The water inlet channel is composed of a water-blocking channel and a water-passing channel. The water-blocking rotating arm is rotatably mounted on the base. The positioning pin is slidably mounted inside the water-blocking rotating arm, and a spring connects the positioning pin and the water-blocking rotating arm. The water-passing rotating arm is rotatably mounted at one end of the water-blocking rotating arm via a torsion spring. The base has an M-shaped locking position. The water-blocking rotating arm is installed between the water inlet channel and the M-shaped locking position. When the water-blocking rotating arm rotates to the highest point of the M-shaped locking position, the water-blocking rotating arm disengages from the connection between the water-blocking channel and the water-passing channel. The fulcrum of the water-blocking rotating arm is the center of the arc of the water-blocking channel. The distance from the fulcrum of the water-blocking rotating arm to its end is equal to the radius of the arc of the water-blocking channel. The sum of the distance from the fulcrum of the water-blocking rotating arm to the hinge point of the water-passing rotating arm and the length of the water-passing rotating arm is equal to the maximum radius of the water-passing channel.

[0018] By setting a one-way component, when water flows into the pipe, the water flows into the water-blocking channel in the base and impacts the water-blocking rotating arm. The water-blocking rotating arm rotates to the water passage, and the water passage rotating arm opens under the action of the torsion spring to be flush with the water-blocking rotating arm, so that the water flows into the water storage chamber. When the water flow in the pipe stops, the water pressure in the water storage chamber will push the water-blocking rotating arm located in the water passage, so that the water-blocking rotating arm rotates to the water-blocking channel. During the rotation of the water-blocking rotating arm, the flow area of ​​the water passage gradually decreases. At this time, the water flow speed sprayed out by the water pressure in the water storage chamber increases, so as to achieve reverse flushing of the filter screen before the one-way component is completely closed, so as to maintain the pressure difference between the inlet and outlet, thereby ensuring that the function of the drive device is not affected, so as to avoid the electrode stopping rotation and slowing down the rate of the deposit structure on the electrode surface.

[0019] Preferably, the float rocker arm is hinged to the nozzle connecting rod, one end of the float rocker arm is rotatably connected to the double-headed float, and the hinge fulcrum of the float rocker arm and the nozzle connecting rod is located on the float rocker arm near the double-headed float at a point less than 1 / 2 the length of the float rocker arm.

[0020] By setting the position of the float rocker and the nozzle connecting rod fulcrum, when the water flow in the pipeline stops and the electrode rotates to drive the impeller to pressurize, the thrust applied by the water storage chamber to the nozzle is greater than the component force in the axial direction of the nozzle when the float floats. This ensures that the nozzle can smoothly extend to clean the electrode when the water storage chamber is pressurized, reducing the scale buildup of water residue on the electrode and avoiding affecting the accuracy of the electrode measurement.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. By setting up a drive device, the drive device uses water flow power to drive the electrode to rotate, so that multiple sides of the electrode can be washed by water flow, thereby reducing the frequency of electrode cleaning and avoiding electrode damage caused by frequent cleaning, ensuring the service life of the electrode and the measurement accuracy of the electromagnetic flowmeter. The drive device is set in the water storage cavity between the lining and the shell, thereby avoiding the turbulence caused by the operation of the drive device from affecting the electrode's current detection in the water, thus ensuring the accuracy of the electric flowmeter measurement. When the water flows through the water storage cavity, it can drive the energy storage device to store energy and water. After the water flow stops, the energy storage device releases energy to drain the stored water to wash the electrode, thereby preventing impurities adhering to the electrode from condensing and forming scale after the water flow stops, thus further reducing the frequency of electrode cleaning and ensuring the service life of the electrode.

[0023] 2. By setting the control switch, when the water flow in the pipeline stops, the control switch disengages from the ratchet connected to the ratchet rack on the energy storage device. The coil spring connected to the ratchet releases, driving the drive device. The pressure inside the water storage chamber increases, and the nozzle extends under the water pressure in the water storage chamber, ensuring that the nozzle points more accurately at the electrode. The water stored in the water storage chamber is sprayed out through the nozzle, thereby improving the cleaning effect of the electrode and preventing water stains from remaining on the electrode after the water flow in the pipeline stops, which would cause scaling. After cleaning, the nozzle stays on the upper side of the electrode to shield the residual water stains in the pipeline, preventing residual water stains from dripping onto the nozzle and forming scaling, thus providing a secondary protection effect for the electrode and ensuring the measurement accuracy of the electrode.

[0024] 3. By installing a coil spring on the water storage chamber and connecting it to one end of the electrode via a gear set for unidirectional rotation, when water flows into the water storage chamber, the push plate of the energy storage device pulls the coil spring to tighten. When the water flow in the pipe stops, the coil spring releases and drives the electrode to rotate through the gear set. The rotation of the impeller on the electrode provides pressure inside the water storage chamber, thereby increasing the water spray pressure. The rotation of the electrode also allows for full-circumference cleaning of the electrode, improving the cleaning effect, ensuring the accuracy of electrode measurement, reducing the frequency of electrode maintenance, and extending the service life of the electrode. Attached Figure Description

[0025] Figure 1 This is a partial cross-sectional view of the present invention;

[0026] Figure 2 for Figure 1 A magnified view of part A;

[0027] Figure 3 for Figure 1 Partial sectional view of BB;

[0028] Figure 4 for Figure 3 Enlarged view of part C;

[0029] Figure 5 for Figure 3 DD partial sectional view;

[0030] Figure 6 for Figure 5 Enlarged view of part E;

[0031] Figure 7 This is a diagram showing the location of the side pipes;

[0032] Figure 8 for Figure 7 Enlarged view of part F;

[0033] Figure 9 for Figure 7 Enlarged section view of the GG cross-section;

[0034] Figure 10 for Figure 3 Power storage state diagram.

[0035] In the diagram: 1. Shell; 2. Lining; 3. Electrode; 4. Water storage chamber; 41. Spray nozzle; 42. Positive pressure chamber; 43. Negative pressure chamber; 5. Energy storage device; 51. Push plate; 52. Pressure relief port; 53. Float switch; 54. Energy storage spring; 6. Drive device; 61. Impeller; 62. Inlet; 63. Outlet; 64. Baffle; 65. One-way component; 651. Water-blocking rotating arm; 652. Water-passing rotating arm; 653. Spring; 654. Positioning pin; 655. Base; 6551. Water inlet channel; 6552. Water-blocking channel; 6 553. M-type locking mechanism; 66. Flat sphere; 67. Connecting rod; 68. Control switch; 681. Double-headed float; 682. Nozzle; 6821. Nozzle; 6822. Ball bearing; 683. Float rocker arm; 684. Nozzle connecting rod; 7. Filter screen; 8. Coil spring; 9. Ratchet; 10. Float connecting rod; 11. Sliding sleeve; 12. Sliding connecting rod; 13. Sliding sleeve; 14. Ratchet rack; 15. Transmission gear; 16. Gear set; 161. Driving bevel gear; 162. Driven bevel gear; 163. Drive gear; 164. Spur gear. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] An electromagnetic flowmeter for mining, reference Figure 1 , Figure 2 Includes housing 1, liner 2, and electrode 3, reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 Electrode 3 is rotatably mounted on lining 2. A water storage cavity 4 is provided on housing 1, and a drive device 6 is installed inside the water storage cavity 4. The drive device 6 includes an impeller 61 mounted on one end of electrode 3 located in the water storage cavity 4. The water storage cavity 4 is provided with an inlet 62 and an outlet 63 communicating with the inner wall of lining 2. A filter screen 7 and a one-way component 65 are installed at the inlet 62. The one-way component 65 is used to allow water to flow unidirectionally into the water storage cavity 4. A baffle 64, a flat sphere 66, and a connecting rod 67 are provided at the outlet 63. The baffle 64 is rotatably connected to the inner wall of lining 2 via a torsion spring. The baffle 64 is connected to the flat sphere 66 via the connecting rod 67 and partially surrounds the outlet 63, creating a pressure difference between the outlet 63 and the inlet 62. Figure 8 When water flows into the pipe, the one-way component 65 opens, and the water storage chamber 4 is connected to the pipe. Water flows into the water storage chamber 4. At the same time, the baffle 64 located on the inner wall of the lining 2 rotates under the impact of the water flow, pushing the connecting rod 67 to push open the flat sphere 66, so that the outlet 63 is connected to the pipe. At this time, water flow is generated in the water storage chamber 4, which drives the impeller 61 to rotate. The impeller 61 drives the electrode 3 to rotate in the same direction. Even when water flows into the pipe, the high-speed water flow can flush the electrode 3 around the entire circumference, thereby avoiding water impurities from adhering to the electrode 3 and forming scale, reducing the cleaning frequency of the electrode 3. By rotating the electrode 3 in this way, the water flow in the pipe itself can be used to slow down the scaling rate without providing additional power. Moreover, the driving method will not generate turbulence around the electrode 3, thereby avoiding the generation of heat flow that affects the measurement accuracy of the electromagnetic flowmeter.

[0038] refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 10The energy storage device 5 includes a push plate 51, a pressure relief port 52, a float switch 53, and a storage spring 54. The push plate 51 is connected to the storage spring 54 and installed on the housing 1. The push plate 51 divides the water storage chamber 4 into a positive pressure chamber 42 and a negative pressure chamber 43. A float switch 53 is installed at the pressure relief port 52, and the horizontal height of the pressure relief port 52 is 2cm lower than the horizontal height of the electrode 3. A ratchet rack 14 is rotatably installed on the push plate 51. The ratchet rack 14 is connected to a ratchet wheel 9. One end of the ratchet rack 14 is connected to a control switch 68. A coil spring 8 is installed on the inner wall of the water storage chamber 4. A ratchet 9 is coaxially connected to spring 8. The ratchet 9 and transmission gear 15 are connected to each other via a one-way bearing for unidirectional rotation. Transmission gear 15 is connected to electrode 3 via a gear set 16. Gear set 16 includes a driving bevel gear 161, a driven bevel gear 162, a drive gear 163, and a spur gear 164. Spur gear 164 is connected to drive gear 163. Drive gear 163 is coaxially connected to driving bevel gear 161. Driving bevel gear 161 is connected to driven bevel gear 162. Driven bevel gear 162 is mounted at one end of electrode 3. Water is introduced into water storage chamber 4. When the water level rises, the storage spring 54 is compressed, and the ratchet 14 is mounted on a sliding sleeve 13 that is rotatably connected to the sliding connecting rod 12. The sliding connecting rod 12 is rotatably connected to the float connecting rod 10 via a sliding sleeve 11 threaded onto the inner wall of the water storage chamber 4. The float connecting rod 10 is rotatably connected to the control switch 68. As the water level rises, the double-headed float 681 floats up, driving the float connecting rod 10. The float connecting rod 10 drives the sliding connecting rod 12, which slides and rises in the sliding sleeve 11. The ratchet 14 in the sliding sleeve 13 also rises, and the float rocker... When 683 reaches the designated position, the ratchet 14 rotates horizontally, and at this time, the ratchet 14 is connected to the ratchet 9 located on the inner wall of the water storage chamber 4. The ratchet 9 is coaxially connected to the coil spring 8, and the ratchet 9 is rotatably connected to the transmission gear 15 through a one-way bearing. When water is stored in the water storage chamber 4, and the push plate 51 compresses the spring 653 and moves backward, the push plate 51 drives the ratchet 14 to rotate the ratchet 9. The ratchet 9 drives the coil spring 8 to tighten. At this time, the transmission gear 15 does not rotate under the action of the one-way bearing. The electrode 3 is connected to the transmission gear 15 through the gear set 16. (Reference) Figure 5The gear set 16 is a transmission between bevel gears and spur gears 164. Of course, other gear sets 16 can also be used, such as a combination of helical gears and bevel gears, as long as the transmission between the transmission gear 15 and the gear set 16 is achieved. At this time, due to the compression of the push plate 51, the negative pressure chamber 43 of the water storage chamber 4 is in a negative pressure state, and the push plate 51 cannot be pushed out by the spring 653. When the water flow in the pipe stops and the water level is lower than that of the electrode 3, the float switch 53 located at the pressure relief port 52 connects the pipe and the negative pressure chamber 43. At this time, the push plate 51 is pushed and pressurized by the spring 653, and the nozzle 682 of the spray nozzle 41 extends under the action of water pressure. The nozzle connecting rod 684 drives the float rocker 683 to swing, causing the double-headed float 681 to sink. The water flow in the water storage chamber 4 washes the electrode 3 through the nozzle 6821. At the same time, The double-headed float 681 drives the float connecting rod 10 to press down the sliding connecting rod 12, disengaging the ratchet rack 14 inside the sleeve from the ratchet 9. The coil spring 8 connected to the ratchet 9 is released. The coil spring 8 drives the transmission gear 15 through the one-way bearing. The transmission gear 15 rotates the electrode 3 through the gear set 16. The impeller 61 mounted on the electrode 3 rotates synchronously. The rotating impeller 61 increases the water pressure in the water storage chamber 4 and increases the water flow rate of the nozzle 6821. The nozzles 6821 are evenly arranged pointing towards the electrode 3, and the nozzles 6821 are equipped with balls 6822. The balls 6822 and the nozzles 6821 are in clearance fit. When the water flows through the nozzles 6821, the flow area becomes smaller and the water flow rate increases. Therefore, the rotating electrode 3 can be flushed around its entire circumference, reducing the residue of the deposits on the electrode 3 and thus slowing down the scaling rate of the electrode 3.

[0039] refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The control switch 68 includes a double-headed float 681, a nozzle 682, a spray nozzle 6821, a ball bearing 6822, a float rocker arm 683, and a nozzle connecting rod 684. The nozzle 682 is slidably connected to the spray nozzle 41 between the lining 2 and the water storage chamber 4, and the nozzle 682 is hollow at one end of the water storage chamber 4, communicating with the water storage chamber 4. The nozzle 682 is rotatably connected to the nozzle connecting rod 684, and the nozzle connecting rod 684 is rotatably connected to the float rocker arm 683. The float rocker arm 683 is limited and installed on the inner wall of the water storage chamber 4. The double-headed float 681 is connected to the other end of the float rocker arm 683. Of course, other structures can also be used to limit the movement of the float rocker arm 683, such as a torsion spring limiter, as long as the rotation limit of the float rocker arm 683 is achieved. Figure 10When water flows into the water storage chamber 4 and the water level rises, the float rises due to buoyancy. Driven by the nozzle connecting rod 684, the nozzle 682 retracts from the spray nozzle 41. The end of the nozzle 682 is set to have the same radius as the arc of the inner wall of the lining 2 to ensure that the nozzle 682 matches the inner wall of the lining 2 when retracted, avoiding turbulence at the electrode 3 and causing inaccurate measurement results of the electrode 3. When the water flow in the pipe stops, the nozzle 682 extends under the water pressure in the water storage chamber 4. The projection of the extended nozzle 682 in the direction of gravity can fully cover the electrode 3, thereby preventing residual sewage on the inner wall of the lining 2 from dripping onto the electrode 3 and forming scale after the nozzle 682 finishes spraying water, thus ensuring that the cleaning effect of the electrode 3 is maintained, slowing down the scaling rate of the electrode 3, and reducing the cleaning frequency of the electrode 3.

[0040] refer to Figure 7 , Figure 8 The one-way component 65 includes a base 655 mounted on the housing 1. The base 655 contains a water-blocking channel 6552 and a water-passing channel. A water-blocking rotating arm 651 is rotatably mounted on the base 655, and a water-passing rotating arm 652 is rotatably mounted on the water-blocking rotating arm 651 via a torsion spring. The water-blocking rotating arm 651 is hollow inside, and a positioning pin 654 is slidably mounted on it via a spring 653. The positioning pin 654 is located within an M-shaped locking position 6553 on the base 655. When water flows into the pipe, the water flowing into the water-blocking channel 6552 rotates the water-blocking rotating arm 651, causing the positioning pin 654 to disengage from its current locking position. When the positioning pin 654 slides to the highest point of the M-shaped locking position 6553, the water-blocking rotating arm 651 is engaged. The water-operated arm 651 will disengage from the water-blocking channel 6552 and rotate into the water-passing channel. The water-passing arm 652 will rotate under the action of the spring 653 to a position flush with the water-blocking arm 651. At this time, the water flows from the water-passing arm 652 into the water storage chamber 4 in the water-passing channel. When the water flow in the pipe stops, the energy storage device 5 in the water storage chamber 4 begins to pressurize, and the water flows out from the water inlet channel 6551. When passing through the water-passing channel, the water flow impacts the water-blocking arm 651. During the rotation of the water-blocking arm 651, the water-passing channel gradually narrows, and the water flow velocity increases, impacting the filter screen 7. This avoids the problem of the filter screen 7 at the water inlet 62 being blocked by impurities, resulting in a small water flow and a small pressure difference in the water storage chamber 4, causing no water flow.

[0041] Working principle: (Reference) Figures 1 to 10When there is no water flow in the pipe, the double-headed float 681 of the control switch 68 falls naturally under gravity, driving the float rocker 683 to push the nozzle connecting rod 684 to push the nozzle 682 out of the spray nozzle 41. The float connecting rod 10 connected to the double-headed float 681 drives the sliding connecting rod 12 to fall in the sliding sleeve 11. At this time, the sliding sleeve 13 connected to the sliding connecting rod 12 rotates, driving the ratchet rack 14 to rotate and disengage from the ratchet 9. When water flows into the pipe, the water-blocking rotating arm 651 in the one-way component 65 on the inlet 62 will rotate. At this time, the positioning pin 654 connected to the water-blocking rotating arm 651 by the spring 653 disengages from the M-type locking position 6553. When the positioning pin 654 slides to the highest point of the M-type locking position 6553, the water-blocking rotating arm 651 will disengage from the water-blocking channel 6552 and rotate to In the water passage, the water-passing rotating arm 652 rotates to a position flush with the water-blocking rotating arm 651 under the action of the spring 653. At this time, the water flows through the water-passing rotating arm 652 into the water storage chamber 4. Under the impact of the water flow in the pipe, the baffle 64 of the outlet 63 rotates the connecting rod 67, pushing the flat spherical body 66 to open the outlet 63. The 1 / 4 spherical baffle 64 partially covers the outlet 63, creating a pressure difference between the outlet 63 and the inlet. When the water level in the water storage chamber 4 rises to the height of the double-headed float 681, the double-headed float 681 floats up under the action of buoyancy, causing the float rocker arm 683 to swing. The float rocker arm 683 pulls the nozzle connecting rod 684 to retract the nozzle 682 from the spray nozzle 41. At the same time as the double-headed float 681 floats up, it drives the float connecting rod... 10. The float connecting rod 10 pulls the sliding connecting rod 12 vertically upward in the sliding sleeve 11, causing the ratchet 14 on the sliding sleeve 13 connected to the sliding connecting rod 12 to contact the ratchet 9 on the water storage chamber 4. When the water storage chamber 4 is full, the push plate 51 in the energy storage device 5 compresses the spring 653 to expand the water storage space. At this time, the ratchet 14, which is rotatably connected to the push plate 51, moves together with the push plate 51 in the sliding sleeve 13 toward the negative pressure chamber 43. The ratchet 14 rotates the ratchet 9, and the coil spring 8 connected to the ratchet 9 tightens. When the water flow in the pipe stops, the baffle 64 is reset under the action of the spring 653 and pulls the connecting rod 67. The connecting rod 67 drives the flat ball 66 to close the outlet 63. At the same time, the float switch 53 located at the pressure relief port 52 opens the pressure relief port 52, opening the negative pressure chamber 43. Connected to the pipeline, the push plate 51, under the elastic force of the spring 653, squeezes the water storage chamber 4. Water flows out from the inlet channel 6551 in the one-way component 65. When passing through the water passage, the water flow impacts the water-blocking rotating arm 651. During the rotation of the water-blocking rotating arm 651, the water passage gradually narrows, and the water flow velocity increases to backwash the filter screen 7. When the water-blocking rotating arm 651 rotates to the water-blocking channel 6552, the inlet 62 closes. At this time, the nozzle 6821 extends into the pipeline under the water pressure of the water storage chamber 4. The nozzle 682 connects to the water storage chamber 4, and multiple nozzles 6821 pointing to the electrode 3 begin to spray water. A ball bearing 6822 is provided inside the nozzle 6821. The ball bearing 6822 and the nozzle 6821 are fitted with a clearance. When the water flows through the nozzle 6821, the flow area becomes smaller.As the water flow velocity increases, and the nozzle 682 extends, the double-headed float 681 on the control switch 68 moves in the direction of gravity under the swing of the float rocker 683. The float connecting rod 10, connected to the double-headed float 681, drives the sliding connecting rod 12 to press down the ratchet rack 14 in the sliding sleeve 13 connected to the sliding connecting rod 12. The ratchet rack 14 disengages from the ratchet 9, releasing the coil spring 8 connected to the ratchet 9. This releases the unidirectional rotating transmission gear 15, which is coaxial with the ratchet 9. The transmission gear 15 drives the electrode 3 connected to the transmission gear 15, thereby increasing the pressure in the water storage chamber 4 after the water supply is stopped, improving the cleaning effect, slowing down the scaling rate of the electrode 3, reducing the cleaning frequency of the electrode 3, ensuring the measurement accuracy of the electrode 3, and extending the service life of the electrode 3.

[0042] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments / implementation methods. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments / implementation methods in this invention will not be described separately.

Claims

1. A mine electromagnetic flowmeter characterized in that, The device includes a shell (1), a liner (2), and an electrode (3). The liner (2) is disposed inside the shell (1), and the electrode (3) is rotatably mounted inside the liner (2). A water storage cavity (4) is provided on the shell. A water nozzle (41) communicating with the water storage cavity (4) is provided on the liner (2). The water nozzle (41) faces the electrode (3). An energy storage device (5) is connected to the water storage cavity (4). A driving device (6) is provided on the electrode (3). The driving device (6) drives the electrode (3) to rotate by water flow power and makes the water storage cavity (4) store water. It also controls the energy storage device (5) to store energy. The energy storage device (5) releases energy after the water flow stops, so that the water in the water storage cavity (4) is discharged from the water nozzle (41).

2. A mine electromagnetic flowmeter according to claim 1, characterised in that: The driving device (6) includes an impeller (61), an inlet (62), an outlet (63), a baffle (64), a one-way component (65), a flat sphere (66), a connecting rod (67), and a control switch (68). One end of the electrode (3) is fixedly mounted with the impeller (61), which is located inside the water storage chamber (4). The inner wall of the lining (2) has an inlet (62) and an outlet (63) communicating with the water storage chamber (4), and the electrode (3) is located between the outlet (63) and the inlet (62). A filter screen (7) is installed at the inlet (62) of the lining (2). A one-way component (65) is provided on the housing (1). The one-way component (65) is used for… To allow water to enter from the inlet (62) and prevent water from flowing out from the inlet (62), the baffle (64) is hinged to the inner wall of the lining (2) by a torsion spring. The baffle (64) is a 1 / 4 hollow sphere and partially encloses the outlet (63). The inlet (62), baffle (64), and outlet (63) are arranged axially along the direction of water flow. The outlet (63) is provided with a flat sphere (66). A connecting rod (67) is connected between the baffle (64) and the flat sphere (66). A control switch (68) is connected to the spray nozzle (41). The control switch (68) opens the spray nozzle (41) when the energy storage device (5) is triggered and the water flow stops.

3. A mine electromagnetic flowmeter according to claim 2, characterised in that: The energy storage device (5) includes a push plate (51), a pressure relief port (52), a float switch (53), and a power storage spring (54). The push plate (51) is slidably installed inside the water storage chamber (4), and the push plate (51) is connected to the outer shell through the power storage spring (54). The push plate (51) divides the water storage chamber (4) into a positive pressure chamber (42) and a negative pressure chamber (43). The power storage spring (54) is located inside the negative pressure chamber (43). The pressure relief port (52) is set on the lining (2), and the negative pressure chamber (43) is connected to the pressure relief port (52). The horizontal height of the pressure relief port (52) is 1-2 cm less than the horizontal height of the electrode (3). A float switch (53) is set on the inner wall of the lining (2) at the pressure relief port (52).

4. A mine electromagnetic flowmeter according to claim 3, characterised in that: The control switch (68) includes a double-headed float (681), a nozzle (682), a float rocker (683), and a nozzle connecting rod (684). The nozzle (682) is slidably installed inside the water outlet (41). The end of the nozzle (682) near the water storage cavity (4) is rotatably connected to the nozzle connecting rod (684). One end of the float rocker (683) is hinged to the inner wall of the water storage cavity (4). The nozzle connecting rod (684) is connected to the float rocker. (683) Rotatable connection, one end of the float rocker (683) is rotatably connected to the double-headed float (681), the nozzle (682) is provided with multiple nozzles (6821), and the nozzle (682) is connected to the water storage chamber (4), the nozzle (6821) is provided with a ball (6822), the ball (6822) is in clearance fit in the nozzle (6821), and the nozzle (6821) is evenly distributed pointing to the electrode (3).

5. A mine electromagnetic flowmeter according to claim 4, characterised in that: The float rocker (683) is hinged to the inner wall of the water storage cavity (4). The end face of the nozzle (682) at one end of the lining (2) is an arc surface, and the arc surface is equal to the arc radius of the inner wall of the lining (2). The tangent of the nozzle (682) along the axis of the electrode (3) is arc-shaped, and the projection width of the arc in the direction of gravity is 0.5-1cm greater than the diameter of the electrode (3). When water flows into the pipe, when the double-headed float (681) floats to the highest point, the arc surface of the nozzle (682) end face matches the arc surface of the inner wall of the lining (2).

6. A mine electromagnetic flowmeter according to claim 4, characterised in that: A ratchet (9) is rotatably mounted on the inner wall of the water storage chamber (4) via a coil spring (8). A float connecting rod (10) is rotatably connected to the double-headed float (681). A sliding sleeve (11) is threaded onto the inner wall of the housing (1). A sliding connecting rod (12) is slidably mounted inside the sliding sleeve (11). The sliding connecting rod (12) is rotatably connected to the float connecting rod (10). A sliding sleeve (13) is connected to the end of the sliding connecting rod (12) away from the float connecting rod (10). A ratchet rack (14) that cooperates with the ratchet (9) is slidably connected to the sliding sleeve (13). One end of the ratchet rack (14) is rotatably connected to the push plate (51). A transmission gear (15) is coaxially and rotatably mounted on the ratchet (9). A gear set (16) is connected between the transmission gear (15) and the electrode (3).

7. The electromagnetic flowmeter for mining according to claim 3, characterized in that: The one-way component (65) includes a water-blocking rotating arm (651), a water-passing rotating arm (652), a spring (653), a positioning pin (654), and a base (655). The base (655) is located below the housing (1). A water inlet channel (6551) is provided on the base (655). The water inlet (62) is connected to the water storage chamber (4) through the water inlet channel (6551). The water inlet channel (6551) is composed of a water-blocking channel (6552) and a water-passing channel (6554). The water-blocking rotating arm (651) is rotatably mounted on the base (655). The positioning pin (654) is slidably mounted inside the water-blocking rotating arm (651), and a spring (653) is connected between the positioning pin (654) and the water-blocking rotating arm (651). The water-passing rotating arm (652) rotates through a torsion... A spring is rotatably mounted on one end of the water-blocking rotating arm (651). The base (655) is provided with an M-shaped locking position (6553). The water-blocking rotating arm (651) is installed between the water inlet channel (6551) and the M-shaped locking position (6553). When the water-blocking rotating arm (651) rotates to the highest point of the M-shaped locking position (6553), the water-blocking rotating arm (651) disengages from the connection between the water-blocking channel (6552) and the water passage channel (6554). The fulcrum of the water-blocking rotating arm (651) is the center of the arc of the water-blocking channel (6552). The distance from the fulcrum of the water-blocking rotating arm (651) to the end is equal to the radius of the arc of the water-blocking channel (6552). The sum of the distance from the fulcrum of the water-blocking rotating arm (651) to the hinge point of the water passage rotating arm (652) and the length of the water passage rotating arm (652) is equal to the maximum radius of the water passage channel (6554).

8. The electromagnetic flowmeter for mining according to claim 4, characterized in that: One end of the float rocker (683) is rotatably connected to the double-headed float (681), and the hinge point of the float rocker (683) and the nozzle connecting rod (684) is located on the float rocker (683) at a point on the double-headed float less than 1 / 2 the length of the float rocker (683).

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