High-precision uniflow meter based on injection molding magnetic steel coupling

Abstract

The high-precision uniflow meter based on injection molding magnetic steel coupling comprises a shell part, an impeller assembly and a sealing part, the impeller assembly is arranged in the shell part, the sealing part is arranged between the impeller assembly and the shell part, a first protection part is arranged at the top of the shell part, and a second protection part is arranged at the bottom of the shell part. The top of the first protection piece is rotationally connected with a second protection piece, the second protection piece can be flexibly opened and closed through the rotating connection structure, maintenance or reading operation can be conveniently conducted on parts such as a counter in the first protection piece, and meanwhile the second protection piece is in the closed state. According to the high-precision uniflow meter based on injection molding magnetic steel coupling, the product starting performance and the magnetic steel coupling performance are improved, all the assemblies work cooperatively, overall stable operation and accurate metering are guaranteed, meanwhile, the counter can be effectively protected through the protection component, the overall fixing effect is enhanced through the anti-theft ring, impurities in water can be filtered through the filter screen, and the service life of the uniflow meter is prolonged. The reliability and the service life of the equipment are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the single flow meter field, in particular to a high-precision single flow meter based on injection-molded magnetic steel coupling. BACKGROUND

[0002] The single flow meter belongs to the water flow metering equipment field, is mainly applied to the flow metering scene of domestic or industrial water, relates to mechanical rotation transmission, magnetic coupling technology, impurity filtration and metering component protection and other related technical categories, and aims to realize accurate metering and long-term stable operation of water flow through the cooperation of various components.

[0003] In the prior art, the instrument for water flow metering has many deficiencies in structural design and performance. The traditional magnetic steel is mostly formed by die casting sintering process, which has low size precision, is heavy and is prone to fragmentation, so that the overall weight of the impeller assembly is heavy, and it is difficult to realize the suspended state, which not only affects the starting performance and the magnetic steel coupling effect, but also may increase the resistance of the impeller rotation due to the weight problem; at the same time, there is a lack of convenient and effective way to adjust the flow error, and the metering accuracy is difficult to guarantee. In addition, some devices lack effective impurity filtration structure, and impurities in water are easy to cause wear and tear to internal components, affecting the reliability and service life of the device; the counter assembly lacks special protection components, is easy to be damaged by external factors, and the overall fixing effect is poor, the anti-theft performance is insufficient, the stability of the components working together is poor, and it is difficult to balance the metering accuracy and the stability of long-term operation. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a high-precision single flow meter based on injection-molded magnetic steel coupling to solve the technical problem that the traditional magnetic steel mostly adopts die casting sintering forming process, which has low size precision, is heavy and is prone to fragmentation, so that the overall weight of the impeller assembly is heavy, and it is difficult to realize the suspended state, which not only affects the starting performance and the magnetic steel coupling effect, but also may increase the resistance of the impeller rotation due to the weight problem.

[0005] To achieve the above purpose, the application provides the following technical scheme: a high-precision single flow meter based on injection-molded magnetic steel coupling, comprising a housing, an impeller assembly and a sealing element, the impeller assembly is arranged in the interior of the housing, and the sealing element is arranged between the impeller assembly and the housing.

[0006] The top of the housing is provided with a first protection element, the top of the first protection element is rotationally connected with a second protection element, the rotationally connected structure enables the second protection element to be flexibly opened and closed, facilitating the maintenance or reading operation of the counter and other components in the first protection element, and in the closed state, the first protection element and the second protection element can form double protection, effectively reducing the erosion of external dust, water vapor and other elements to the internal elements.

[0007] The anti-theft ring is arranged between the shell and the first protective member, and the anti-theft ring can enhance the anti-theft performance of the overall structure, avoid unauthorized personnel from disassembling the flow table to tamper with the metering data or damage the internal components, and the sealing member is externally provided with an injection molding magnetic steel coupling assembly which realizes non-contact transmission of power through magnetic coupling principle, can efficiently transmit power while ensuring the sealing performance of the sealing member, and improves the accuracy of metering.

[0008] The flow error adjusting mechanism is arranged outside the transmission member, can detect and process the power parameters transmitted by the transmission member, and provides an accurate basis for metering and counting, and the first protective member is internally provided with a threaded compression ring which can tightly fix the components in the first protective member through threaded connection, and enhances the stability of the structure.

[0009] The internal cavity of the first protective member is provided with a counter which is connected with the flow error adjusting mechanism, can receive the signals transmitted by the flow error adjusting mechanism and count, and thus intuitively reflects the usage amount of water flow, and the internal cavities of the shell are both provided with filter screens which can filter the water flow entering the internal cavities of the shell, intercept impurities in the water, and avoid the impurities from entering the impeller assembly and other components to cause abrasion or jamming.

[0010] The first protective member and the shell are connected through the assembly member, and the left and right sides of the assembly member are both connected with clamping mechanisms, the assembly member provides a mounting basis for the connection of the first protective member and the shell, and the clamping mechanisms can make the connection of the two more stable, and facilitate installation and disassembly;

[0011] The flow error adjusting mechanism is also laterally provided with a rib plate on the side facing the second protective member, and the other side of the flow error adjusting mechanism is provided with a rotating mechanism protruding from the surface of the second protective member, and the rotating structure can drive the flow error adjusting mechanism on the inside to rotate, and thus drive the rib plate on the surface to rotate, that is, the relative position of the rib plate and the water inlet of the surface shell (the water contact surface of the second protective member) can be changed, and thus the damping effect of the rib plate of the second protective member on the impeller is changed, and the effect of affecting the rotating speed of the impeller is achieved.

[0012] Preferably, the clamping mechanism comprises a lever, a first spring is connected between the lever and the assembly member, the first spring provides elastic support for the lever, and the lever can maintain a stable state when not subjected to external force, a load-bearing arm is rotatably connected to the outside of the lever, the load-bearing arm is connected with the assembly member, and the load-bearing arm provides a fulcrum for the rotation of the lever to ensure that the lever can rotate flexibly.

[0013] The lever is connected with a pull rope, the pull rope can transmit the power of the lever to the subsequent components, the outside of the pull rope is connected with a hollow column, the hollow column is slidingly arranged in the inside of the assembly part, and the second spring is connected between the hollow column and the assembly part, so that the hollow column can be reset after being forced to move, thereby ensuring the circulation use of the clamping mechanism.

[0014] The inside of the hollow column is slidingly connected with a clamping arm, the third spring is connected between the clamping arm and the hollow column, the third spring can push the clamping arm to extend outward, so that the clamping arm can be stably clamped into the corresponding clamping groove.

[0015] The inside of the first protection part is provided with a clamping groove matched with the clamping arm, the clamping groove and the clamping arm cooperate to realize clamping and fixing, the assembly part and the first protection part are connected through a bearing, the bearing can reduce the rotating friction between the assembly part and the first protection part, so that the relative rotation of the two is more smooth.

[0016] Preferably, the injection molded magnetic steel coupling assembly comprises an inner magnetic ring and an outer magnetic ring, the inner magnetic ring is fixedly sleeved on the outside of the sealing part, the outer magnetic ring is arranged on the outside of the inner magnetic ring, and the outer magnetic ring is connected with the transmission part, when the sealing part rotates, the inner magnetic ring rotates synchronously.

[0017] The inner magnetic ring drives the outer magnetic ring to rotate through magnetic force, thereby realizing non-contact transmission of power from the sealing part to the transmission part, this transmission mode avoids the friction loss caused by traditional mechanical contact transmission, at the same time, the sealing performance at the sealing part is ensured, water leakage is effectively prevented, and the coupling efficiency and the stability of metering are improved.

[0018] Preferably, the transmission part is a magnetic transmission wheel, and the outer periphery of the transmission part is uniformly distributed with transmission teeth, the transmission teeth are engaged with the flow error adjusting mechanism, the magnetic property of the magnetic transmission wheel enables it to better cooperate with the outer magnetic ring in the injection molded magnetic steel coupling assembly, thereby ensuring the accuracy of power transmission, and the uniformly distributed transmission teeth are engaged with the flow error adjusting mechanism, so that the rotating power can be stably and accurately transmitted to the flow error adjusting mechanism, thereby reducing the error in the power transmission process and providing a reliable rotating speed signal for subsequent metering.

[0019] Preferably, the flow error adjusting mechanism is a reduction gear set, the input shaft of the flow error adjusting mechanism is connected with the transmission part, the output shaft of the flow error adjusting mechanism is connected with the counter, the reduction gear set can slow down the high-speed rotation of the transmission part, so that the rotating speed of the output to the counter matches the counting frequency of the counter, thereby avoiding the distortion of the counter metering caused by the excessively high rotating speed, improving the accuracy of counting, and ensuring the accuracy and reliability of the metering result.

[0020] Preferably, the filter screen is made of stainless steel, and the filter screen is detachably connected to the water inlet and the water outlet in the inner cavity of the shell member through buckles. The stainless steel has good corrosion resistance and wear resistance, can adapt to the environment of long-term water flow erosion, and prolongs the service life of the filter screen. The detachable buckle connection facilitates the user to regularly clean or replace the filter screen, ensures the filtering effect of the filter screen, and avoids affecting the water flow efficiency due to filter screen blockage.

[0021] Preferably, the anti-theft ring is made of metal, and the outer surface of the anti-theft ring is provided with anti-skid lines. The anti-theft ring is in interference fit with the shell member and the first protective member. The metal anti-theft ring has high strength and is not easy to be damaged, and can effectively prevent unauthorized disassembly. The anti-skid lines on the outer surface increase the difficulty of disassembly, further improving the anti-theft performance. The interference fit makes the anti-theft ring tightly combined with the shell member and the first protective member, which is difficult to be easily separated, thereby enhancing the overall anti-theft effect of the flow table.

[0022] Preferably, the counter is a mechanical digital counter, and a transparent dust cover is arranged on the surface of the counter. The dust cover is sealingly connected between the first protective member. The mechanical digital counter has the characteristics of stable measurement and high reliability, and is not affected by the interference of electronic components. The transparent dust cover facilitates the user to directly read the counting data, and can prevent dust and water vapor from entering the inside of the counter, thereby ensuring the clarity and accuracy of the counting.

[0023] The sealing connection further enhances the protection effect. The threaded compression ring is made of plastic, and the inner surface of the threaded compression ring is provided with a sealing rubber ring. The threaded compression ring is tightly connected with the inner wall of the first protective member through threads. The plastic material is light in weight and has certain corrosion resistance, thereby reducing the overall weight of the flow table. The sealing rubber ring can enhance the sealing property between the threaded compression ring and the inner wall of the first protective member, thereby preventing water vapor from penetrating. The threaded tight connection ensures the stability of the fixation of the threaded compression ring to the internal components.

[0024] Preferably, the second protective member is connected with the first protective member through a hinge, and a magnetic sheet is arranged on the inner side of the second protective member. An adaptive iron sheet is arranged at the corresponding position of the first protective member. The hinge connection enables the second protective member to rotate flexibly, thereby facilitating the opening and closing operation. The cooperation of the magnetic sheet and the iron sheet enables the second protective member to be tightly adsorbed on the first protective member in the closed state, thereby avoiding the accidental opening of the second protective member due to vibration and other factors. Meanwhile, the cooperation of the magnetic sheet and the iron sheet enhances the protection effect of the internal components of the first protective member, and reduces the invasion of external impurities.

[0025] Preferably, the assembly member is made of aluminum alloy, and the outer surface of the assembly member is provided with a corrosion-resistant coating. The aluminum alloy has high strength and light weight, thereby ensuring the structural stability of the assembly member and reducing the overall weight of the flow table. The corrosion-resistant coating can effectively resist the corrosion of corrosive substances in water and air, thereby prolonging the service life of the assembly member.

[0026] The connecting part of the assembly part and the shell part is provided with a sealing gasket, which can enhance the sealing between the assembly part and the shell part, prevent water flow from leaking from the connecting part, the outer end of the lever is provided with an anti-skid rubber sleeve, which increases the friction between the hand and the lever during operation, facilitates the pressing of the lever, and improves the comfort of operation, the connecting part of the lever and the load-bearing arm is provided with a wear-resistant gasket, which can reduce the wear of the lever and the load-bearing arm during relative rotation, prolong the service life of the clamping mechanism, and ensure long-term stable work.

[0027] The high-precision single-flow meter based on injection-molded magnetic steel coupling has the following beneficial effects:

[0028] The high-precision single-flow meter based on injection-molded magnetic steel coupling adds a flow error adjusting mechanism, which adjusts the position of the rib plate on the surface of the flow error adjusting mechanism to adjust the rotational speed of the impeller, and can adjust the flow error. The use of injection-molded magnetic steel makes the impeller assembly lighter in weight and can be suspended in water, and then the impeller assembly can be directly supported by the upper steel shaft, the water flows through the filter screen and enters the meter shell to drive the suspended impeller assembly to rotate, and the mechanical rotation is transmitted to the counter assembly by the injection-molded magnetic steel coupling assembly to realize cumulative counting.

[0029] The high-precision single-flow meter based on injection-molded magnetic steel coupling uses an injection molding process of ferrite and nylon for the injection-molded magnetic steel, which is more precise in size, lighter in weight, and less prone to breakage than the traditional die-cast sintered magnetic steel. Due to the significant reduction in weight, the starting performance and magnetic steel coupling performance of the product are improved, and the components work cooperatively to ensure stable operation and accurate measurement of the whole, and the protection part can effectively protect the counter, the anti-theft ring enhances the overall fixing effect, and the filter screen can filter impurities in water, improving the reliability and service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the front view of the present application; Figure 2 is the internal cross-sectional view of the first protection part of the present application; Figure 3 is the side view structural schematic diagram of the present application; Figure 4 is the external schematic diagram of the assembly part of the present application; Figure 5 is the external schematic diagram of the clamping mechanism of the present application; Figure 6 is the structural schematic diagram of the flow error adjusting mechanism of the present application.

[0031] Figure 2 is the internal cross-sectional view of the first protection part of the present application;

[0032] Figure 3 is a schematic diagram of the side view structure of the present application;

[0033] Figure 4 is a schematic diagram of the assembly outside of the present application;

[0034] Figure 5 is a schematic diagram of the carding mechanism outside of the present application.

[0035] Explanation of reference signs:

[0036] 1, housing; 2, impeller assembly; 3, sealing piece; 4, transmission piece; 5, flow error adjusting mechanism; 51, rib plate; 6, threaded pressure ring; 7, counter; 8, first protection piece; 9, second protection piece; 10, anti-theft ring; 11, injection molded magnetic steel coupling assembly; 12, filter screen; 13, assembly; 14, carding mechanism; 141, lever; 142, first spring; 143, pull rope; 144, second spring; 145, hollow column; 146, carding arm; 147, third spring; 148, load-bearing arm. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The present application provides technical solutions, please refer to Figure 1 and Figure 3 A high-precision single-flow meter based on injection molded magnetic steel coupling includes a housing 1, an impeller assembly 2, and a sealing piece 3. The impeller assembly 2 is arranged inside the housing 1, and the sealing piece 3 is arranged between the impeller assembly 2 and the housing 1. The housing 1 provides solid external support and protection for the entire flow meter, which can resist the impact and extrusion of the external environment and protect the internal core components from damage. The impeller assembly 2 can rotate under the push of water flow, efficiently converting the kinetic energy of water flow into mechanical energy to provide raw power for subsequent metering work. The sealing piece 3 effectively blocks the water flow through a tightly fitted structure design, preventing it from leaking from the gap between the impeller assembly 2 and the housing 1, ensuring the sealing performance of the flow meter from the source and avoiding metering errors or equipment damage caused by water leakage.

[0039] Please refer to Figure 2The top of the shell piece 1 is provided with a first protection piece 8, which is a protective cover. The top of the first protection piece 8 is rotationally connected with a second protection piece 9, which is a protective cover. The rotational connection structure makes the second protection piece 9 flexible to open and close, so as to facilitate the maintenance or reading operation of the counter 7 and other components in the first protection piece 8. At the same time, in the closed state, the second protection piece 9 can form double protection with the first protection piece 8, effectively reducing the erosion of external dust, water vapor and other elements on the internal elements, further prolonging the service life of the internal elements, and ensuring the long-term stable operation of the flow table.

[0040] The shell piece 1 and the first protection piece 8 are provided with an anti-theft ring 10, which can enhance the anti-theft performance of the overall structure, avoid unauthorized personnel from disassembling the flow table to tamper with the measurement data or damage the internal components, and thus protect the fairness of measurement and the normal working order of the flow table. The outside of the sealing piece 3 is provided with an injection molded magnetic steel coupling assembly 11, which realizes non-contact transmission of power through magnetic coupling principle, can efficiently transmit power while ensuring the sealing performance of the sealing piece 3, and improves the accuracy of measurement. The magnetic coupling process does not produce mechanical friction, reduces energy loss and component wear caused by friction, and further prolongs the service life of the flow table. The upper end of the sealing piece 3 is provided with a transmission piece 4, which can further transmit the power transmitted by the sealing piece 3 to the subsequent components. The compact structure design can stably transmit power in limited space and reduce power attenuation in the transmission process.

[0041] The outside of the transmission piece 4 is provided with a flow error adjustment mechanism 5, which can detect and process the power parameters transmitted by the transmission piece 4 to provide accurate basis for measurement counting. It has fast detection response speed and can capture subtle changes in power parameters in real time, ensuring that the data provided for measurement counting is timely and accurate. The inside of the first protection piece 8 is provided with a threaded compression ring 6, which can tightly fix the components in the first protection piece 8 through threaded connection, enhance the stability of the structure, and has good adjustability through threaded connection, which is convenient for adjusting the fixing force of the components according to the actual installation requirements, and also facilitates the maintenance and replacement of the internal components.

[0042] The inner cavity of the first protective piece 8 is provided with a counter 7, and the counter 7 is connected between the flow error adjusting mechanism 5, can receive the signal transmitted by the flow error adjusting mechanism 5 and count, thereby directly reflecting the use amount of water flow, has high counting accuracy, small cumulative error, can long-term maintain the accuracy of measurement, and meets the measurement requirements in different scenes. The inner cavity of the shell piece 1 is provided with a filter screen 12 on both sides, the filter screen 12 can filter the water flow entering the inside of the shell piece 1, intercept the impurities in the water, avoid the impurities from entering the impeller assembly 2 and other components to cause abrasion or jam, meanwhile, the flow area of the filter screen 12 is reasonably designed, will not obviously affect the water flow speed, and ensures that the impeller assembly 2 can accurately reflect the actual flow of water flow.

[0043] Please refer to Figure 4 The first protective piece 8 and the shell piece 1 are connected through the assembling piece 13, and the left and right sides of the assembling piece 13 are connected with the clamping mechanism 14, the assembling piece 13 provides a mounting basis for the connection between the first protective piece 8 and the shell piece 1, and the clamping mechanism 14 can make the connection of the two more stable, and is convenient for installation and disassembly, the connection mode of the clamping mechanism 14 is simple to operate, and the installation and disassembly can be completed without complex tools, thereby improving the efficiency of flow meter assembly and maintenance. Please refer to Figure 6 The side of the flow error adjusting mechanism 5 facing the second protective piece 9 is also provided with a transverse rib plate 51, and the other side of the flow error adjusting mechanism 5 is provided with a rotating mechanism protruding from the surface of the second protective piece 9, the rotating mechanism can drive the flow error adjusting mechanism 5 inside to rotate, thereby driving the rib plate 51 on the surface to rotate, that is, the relative position of the rib plate 51 and the water contact surface of the second protective piece 9 of the water inlet of the surface shell can be changed, and then the damping effect of the rib plate 51 on the impeller is changed, thereby affecting the rotating speed of the impeller. The function of the rib plate 51 for adjustment is as follows: The rib plate 51 is arranged on the side of the flow error adjusting mechanism 5 facing the second protective piece 9, that is, the position of the water inlet, the kinetic energy of the water flow passing through the rib plate 51 is lost, and the kinetic energy driving the impeller to rotate is correspondingly reduced, thereby causing the rotating speed of the impeller to be reduced, and the rotating speed of the impeller is adjusted in this way, that is, the measurement result of the measurement assembly can be matched with the actual water flow.

[0044] The side of the flow error adjusting mechanism 5 facing the second protective piece 9 is also provided with a transverse rib plate 51, and the other side of the flow error adjusting mechanism 5 is provided with a rotating mechanism protruding from the surface of the second protective piece 9, the rotating mechanism can drive the flow error adjusting mechanism 5 inside to rotate, thereby driving the rib plate 51 on the surface to rotate, that is, the relative position of the rib plate 51 and the water contact surface of the second protective piece 9 of the water inlet of the surface shell can be changed, and then the damping effect of the rib plate 51 on the impeller is changed, thereby affecting the rotating speed of the impeller.

[0045] The function of the adjusting rib 51 is to:

[0046] The rib 51 is arranged on the side of the flow error adjusting mechanism 5 facing the second protective member 9, i.e., the position of the water inlet. The kinetic energy of the water flowing through the rib 51 is lost, and the kinetic energy driving the impeller to rotate is correspondingly reduced, thereby reducing the rotating speed of the impeller. In this way, the rotating speed of the impeller is adjusted, so that the measurement result of the measurement assembly matches the actual water flow.

[0047] Please refer to Figure 5 The clamping mechanism 14 includes a lever 141, and a first spring 142 is connected between the lever 141 and the assembly part 13. The first spring 142 provides elastic support for the lever 141, so that the lever 141 can remain in a stable state when not subjected to external force, thereby ensuring that the clamping mechanism 14 is always in a reliable connection position in a non-operation state. The lever 141 is externally rotationally connected with a load-bearing arm 148, and the load-bearing arm 148 is connected with the assembly part 13. The load-bearing arm 148 provides a fulcrum for the rotation of the lever 141, ensuring that the lever 141 can rotate flexibly. The position of the fulcrum is designed accurately, which can make the operation of the lever 141 more labor-saving and improve the convenience of operation.

[0048] The lever 141 is connected with a pull rope 143, which can transmit the power of the lever 141 to subsequent components. The pull rope 143 has good flexibility and strength, and can maintain stable power transmission performance after being pulled multiple times without being easily broken or loosened. The pull rope 143 is externally connected with a hollow column 145, which is slidingly arranged in the interior of the assembly part 13. A second spring 144 is connected between the hollow column 145 and the assembly part 13, and the second spring 144 can reset the hollow column 145 after it is moved under force, thereby ensuring the cyclic use of the clamping mechanism 14. The reset speed is fast and the reset position is accurate, thereby ensuring that the clamping mechanism 14 can quickly return to a stable state after each operation.

[0049] The inner cavity of the hollow column 145 is slidingly connected with a clamping arm 146, and a third spring 147 is connected between the clamping arm 146 and the hollow column 145. The third spring 147 can push the clamping arm 146 to extend outward, so that the clamping arm 146 can be stably clamped into the corresponding clamping groove. The elastic force of the third spring 147 is moderate, which can ensure that the clamping arm 146 is tightly clamped with the clamping groove, and will not cause damage to the clamping arm 146 or the clamping groove due to excessive elastic force.

[0050] The inner cavity of the first protective piece 8 is provided with a clamping groove matched with the clamping arm 146, and the clamping groove and the clamping arm 146 are matched to realize clamping fixation. The size precision of the two is high, the matching gap is small, the relative shaking between the first protective piece 8 and the assembling piece 13 can be effectively prevented, and the stability of the connection is ensured. The assembling piece 13 and the first protective piece 8 are connected through a bearing, the bearing can reduce the rotating friction between the assembling piece 13 and the first protective piece 8, the relative rotation of the two is more smooth, and the bearing can also bear certain radial and axial loads, thereby enhancing the bearing capacity of the connection between the two.

[0051] The injection molded magnetic steel coupling assembly 11 comprises an inner magnetic ring and an outer magnetic ring. The inner magnetic ring is fixedly sleeved outside the sealing piece 3, and the outer magnetic ring is arranged outside the inner magnetic ring and connected with the transmission piece 4. When the sealing piece 3 rotates, the inner magnetic ring rotates synchronously. The rotation stability of the inner magnetic ring is good, and the synchronous rotation of the outer magnetic ring can be driven by the stable magnetic force.

[0052] The inner magnetic ring drives the outer magnetic ring to rotate through magnetic force, thereby realizing non-contact transmission of power from the sealing piece 3 to the transmission piece 4. This transmission mode avoids the friction loss caused by traditional mechanical contact transmission, ensures the sealing performance of the sealing piece 3, effectively prevents water leakage, improves the coupling efficiency and the stability of metering, and has fast response speed of magnetic force transmission, so as to timely follow the change of the rotating speed of the sealing piece 3 and ensure the real-time performance of power transmission.

[0053] The transmission piece 4 is a magnetic transmission wheel, and the outer periphery of the transmission piece 4 is uniformly provided with transmission teeth. The transmission teeth are engaged with the flow error adjusting mechanism 5. The magnetic property of the magnetic transmission wheel enables it to better cooperate with the outer magnetic ring in the injection molded magnetic steel coupling assembly 11, thereby ensuring the accuracy of power transmission. The uniformly distributed transmission teeth are engaged with the flow error adjusting mechanism 5, so as to stably and accurately transmit the rotating power to the flow error adjusting mechanism 5, reduce the error in the process of power transmission, provide a reliable rotating speed signal for subsequent metering, and the tooth surface of the transmission teeth is finely processed and has good wear resistance, so as to maintain a good engagement state for a long time.

[0054] The flow error adjusting mechanism 5 is a gear reduction set, the input shaft of the flow error adjusting mechanism 5 is connected with the transmission piece 4, and the output shaft of the flow error adjusting mechanism 5 is connected with the counter 7. The gear reduction set can reduce the high-speed rotation of the transmission piece 4, so as to match the rotating speed of the output to the counter 7 with the counting frequency of the counter 7, avoid the distortion of the counter 7 caused by the too high rotating speed, improve the accuracy of counting, ensure the accuracy and reliability of the metering result, the gear engagement gap of the gear set is small, the transmission precision is high, and the metering error is further reduced.

[0055] The filter screen 12 is made of stainless steel, and is detachably connected to the water inlet and water outlet of the inner cavity of the shell member 1 through buckles. The stainless steel has good corrosion resistance and wear resistance, and can adapt to the environment of long-term water flow erosion, thereby prolonging the service life of the filter screen 12. The detachable buckle connection facilitates the user to regularly clean or replace the filter screen 12, ensures the filtering effect of the filter screen 12, avoids affecting the water flow passing efficiency due to the blockage of the filter screen 12, and the buckle connection structure is simple and convenient to operate without special tools.

[0056] The anti-theft ring 10 is made of metal, and the outer surface of the anti-theft ring 10 is provided with anti-skid lines. The anti-theft ring 10 is in interference fit with the shell member 1 and the first protective member 8. The metal anti-theft ring 10 has high strength and is not easy to be damaged, and can effectively prevent unauthorized disassembly. The anti-skid lines on the outer surface increase the disassembly difficulty and further improve the anti-theft performance. The interference fit makes the anti-theft ring 10 tightly combined with the shell member 1 and the first protective member 8, and it is difficult to be easily separated, thereby enhancing the overall anti-theft effect of the flow table. Meanwhile, the interference fit connection does not need additional fasteners, simplifies the structure, and reduces the assembly difficulty.

[0057] The counter 7 is a mechanical digital counter, and the surface of the counter 7 is provided with a transparent dustproof cover. The dustproof cover is in sealing connection with the first protective member 8. The mechanical digital counter has the characteristics of stable measurement and high reliability, and is not affected by the interference of electronic components. The transparent dustproof cover facilitates the user to directly read the counting data, and can prevent dust and water vapor from entering the inside of the counter 7, thereby ensuring the clarity and accuracy of the counting. The transparent dustproof cover has high light transmittance and will not affect the clarity of the reading. Even if it is used for a long time, it is not easy to produce scratches. The sealing connection further enhances the protection effect.

[0058] The threaded compression ring 6 is made of plastic, and the inner surface of the threaded compression ring 6 is provided with a sealing rubber ring. The threaded compression ring 6 is tightly connected with the inner wall of the first protective member 8 through threads. The plastic material is light in weight and has certain corrosion resistance, thereby reducing the overall weight of the flow table. The sealing rubber ring can enhance the sealing property between the threaded compression ring 6 and the inner wall of the first protective member 8, and prevent water vapor from penetrating. The threaded tight connection ensures the stability of the fixation of the threaded compression ring 6 to the internal components. The plastic material has low cost, can reduce the overall manufacturing cost of the flow table, and has good processing performance, thereby facilitating production and manufacturing.

[0059] The second protection piece 9 is connected with the first protection piece 8 through a hinge, and the inner side of the second protection piece 9 is provided with a magnetic sheet, and the corresponding position of the first protection piece 8 is provided with a matching iron sheet. The hinge connection enables the second protection piece 9 to rotate flexibly, facilitating opening and closing operation. The cooperation of the magnetic sheet and the iron sheet enables the second protection piece 9 to be tightly adsorbed on the first protection piece 8 in the closed state, avoiding accidental opening of the second protection piece 9 due to vibration and other factors, and at the same time enhancing the protection effect of the internal components of the first protection piece 8, reducing the invasion of external impurities. The rotating shaft of the hinge is made of wear-resistant material, which can keep the flexibility of rotation for a long time and is not prone to jamming.

[0060] The assembly piece 13 is made of aluminum alloy material, and the outer surface of the assembly piece 13 is provided with a corrosion-resistant coating. The aluminum alloy material has high strength and light weight, which can ensure the structural stability of the assembly piece 13 while reducing the overall weight of the flow table. The corrosion-resistant coating can effectively resist the corrosion of corrosive substances in water and air, prolonging the service life of the assembly piece 13. The aluminum alloy material has good heat conduction performance, which can dissipate the heat generated by the internal elements of the flow table in time, avoiding the influence of high temperature on the performance of the elements.

[0061] A sealing washer is arranged at the connection between the assembly piece 13 and the shell piece 1. The sealing washer can enhance the sealing performance between the assembly piece 13 and the shell piece 1, preventing water from leaking from the connection. The sealing washer is made of water-resistant material and will not age or deform even after long-term immersion in water, ensuring the durability of the sealing performance. The outer end of the lever 141 is provided with a non-slip rubber sleeve. The non-slip rubber sleeve increases the friction between the hand and the lever 141 during operation, facilitating the pressing of the lever 141 and improving the comfort of operation. The rubber sleeve has good elasticity and can buffer the impact force during pressing, improving the operation experience. A wear-resistant gasket is arranged at the connection between the lever 141 and the load-bearing arm 148. The wear-resistant gasket can reduce the wear of the lever 141 and the load-bearing arm 148 during relative rotation, prolonging the service life of the clamping mechanism 14 and ensuring its long-term stable operation. The wear-resistant gasket is made of high-temperature-resistant material and can adapt to different temperature environments that the flow table may encounter.

[0062] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0063] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. A high-precision single-flow meter based on injection-molded magnet coupling, comprising a housing (1), an impeller assembly (2), and a seal (3), wherein the impeller assembly (2) is disposed inside the housing (1), and the seal (3) is disposed between the impeller assembly (2) and the housing (1), characterized in that: The top of the outer shell (1) is provided with a first protective member (8), and the top of the first protective member (8) is rotatably connected with a second protective member (9). An anti-theft ring (10) is provided between the outer shell (1) and the first protective member (8). An injection-molded magnetic coupling assembly (11) is provided on the outside of the sealing member (3). A transmission member (4) is provided at the upper end of the sealing member (3). A flow error adjustment mechanism (5) is provided on the outside of the transmission member (4). A threaded pressure ring (6) is provided inside the first protective member (8). A counter (7) is provided in the inner cavity of the first protective member (8), and the counter (7) is connected to the flow error adjustment mechanism (5). Filter screens (12) are provided on both sides of the inner cavity of the outer shell (1). The first protective member (8) and the outer shell (1) are connected by an assembly (13), and a snap-fit ​​mechanism (14) is connected on both the left and right sides of the assembly (13). A rib plate (51) is also provided laterally on the side of the flow error adjustment mechanism (5) facing the second protective member (9).

2. The high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The latching mechanism (14) includes a lever (141), a first spring (142) connecting the lever (141) and the assembly (13), a load-bearing arm (148) rotatably connected to the outside of the lever (141), the load-bearing arm (148) being connected to the assembly (13), a pull rope (143) connected to the lever (141), a hollow column (145) connected to the outside of the pull rope (143), and the hollow column (145) slidingly disposed on the assembly. Inside the accessory (13), a second spring (144) is connected between the hollow column (145) and the accessory (13). A locking arm (146) is slidably connected to the inner cavity of the hollow column (145). A third spring (147) is connected between the locking arm (146) and the hollow column (145). The inner cavity of the first protective member (8) is provided with a locking groove that matches the locking arm (146). The accessory (13) and the first protective member (8) are connected by a bearing.

3. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The injection-molded magnet coupling assembly (11) includes an inner magnetic ring and an outer magnetic ring. The inner magnetic ring is fixedly sleeved on the outside of the sealing member (3), and the outer magnetic ring is disposed on the outside of the inner magnetic ring and is connected to the transmission member (4).

4. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The transmission component (4) is a magnetic transmission wheel, and transmission teeth are evenly distributed on the outer circumferential surface of the transmission component (4). The transmission teeth mesh with the flow error adjustment mechanism (5).

5. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The flow error adjustment mechanism (5) is a reduction gear set, and the input shaft of the flow error adjustment mechanism (5) is connected to the transmission component (4), and the output shaft of the flow error adjustment mechanism (5) is connected to the counter (7).

6. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The filter screen (12) is made of stainless steel and is detachably connected to the inlet and outlet of the inner cavity of the outer shell (1) by means of a buckle.

7. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The anti-theft ring (10) is made of metal, and the outer surface of the anti-theft ring (10) is provided with anti-slip texture. The anti-theft ring (10) is interference-fitted with the outer shell (1) and the first protective component (8).

8. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The counter (7) is a mechanical digital counter, and the surface of the counter (7) is provided with a transparent dust cover. The dust cover is sealed to the first protective member (8). The threaded pressure ring (6) is made of plastic, and the inner surface of the threaded pressure ring (6) is provided with a sealing ring. The threaded pressure ring (6) and the inner wall of the first protective member (8) are tightly connected by threads.

9. A high-precision single-current meter based on injection-molded magnet coupling according to claim 1, characterized in that: The second protective element (9) is connected to the first protective element (8) by a hinge, and the inner side of the second protective element (9) is provided with a magnetic absorbing piece, and the corresponding position of the first protective element (8) is provided with a matching iron piece.

10. A high-precision single-current meter based on injection-molded magnet coupling according to claim 2, characterized in that: The assembly (13) is made of aluminum alloy and has an anti-corrosion coating on its outer surface. A sealing gasket is provided at the connection between the assembly (13) and the outer shell (1). An anti-slip rubber sleeve is provided at the outer end of the lever (141). A wear-resistant gasket is provided at the connection between the lever (141) and the load-bearing arm (148).

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