Helical vane type water meter

Abstract

The invention provides a helical vane type water meter, and belongs to the technical field of water meters. The partition plate is arranged in the water inlet cavity of the flow channel of the shell and located on the side far away from the water inlet, water flow entering the water inlet cavity can be blocked at the far end, the turbulent flow influence caused by direct impact of the water flow is avoided, the monitoring precision is improved, and meanwhile, the water flow is prevented from entering the water inlet cavity. The impeller assembly is rotationally installed in the fluid director which is formed by directly connecting and combining the upper fluid guiding part and the lower fluid guiding part, so that the structure for supporting the impeller assembly is simpler, the number of structures needing to be matched with each other is small, the problem that the two ends of a rotating shaft of an integrated impeller are not coaxial due to machining and assembling precision is solved, structural errors are reduced, and the machining efficiency is improved. Besides, one end of the rotating shaft of the integrated impeller extends out of the fluid director and then is provided with a magnet, the magnet is isolated from water flow, the problem that the magnet is interfered by impurities such as rust existing in the water flow is avoided, the monitoring precision of the water meter is further improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of water meters, and more specifically to a helical vane water meter. Background Art

[0002] As a commonly used structure in water supply networks, water meters can measure water consumption and achieve water use supervision in scenarios such as production and domestic water use. However, when the water meter is affected by water flow and other interferences, which affects its measurement accuracy, it will cause property losses to users and others. Therefore, the industry still needs to improve the monitoring accuracy of water meters and reduce interferences to enhance the performance of water meters.

[0003] As a type of metering water meter, for example, a vertical helical vane water meter disclosed in Patent CN200420111534.3 has a flow channel provided in a housing, and a receiving cavity is provided in the middle of the flow channel. A worm gear is rotatably installed in the receiving cavity. At the same time, a disk is provided at one end of the rotating shaft of the worm gear. When water flows through the flow channel, the water impacts the blades of the worm gear in the receiving cavity, thereby driving the worm gear to rotate, causing the disk to rotate synchronously. By cooperating with an external metering structure, the number of rotations of the worm gear is counted, thereby achieving water flow monitoring. Although the above structure can already meet the requirements of flow monitoring, its receiving cavity is a spherical or circular cavity, and its inner wall is usually a continuous arc, resulting in the water flow directly impacting and converging on the side of the receiving cavity far from the water inlet when entering the receiving cavity from the water inlet, causing water flow disorder. The generated turbulent flow will directly act on the worm gear, resulting in the problem of unstable operation of the worm gear, thereby affecting the measurement accuracy. In addition, a magnet is directly installed on the worm shaft of the above worm gear to cooperate to achieve the output of the number of rotations. However, since the magnet is located in the receiving cavity, during later use, rust and the like in the water flow will be directly adsorbed by the magnet, not only affecting the use of the magnet and other cooperating components, but also causing problems such as an increase in the volume and weight of the magnet, imposing a burden on the worm shaft, affecting the normal operation of the worm shaft, and thus affecting the measurement accuracy of the water meter, which is not conducive to the long-term use of the water meter. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention aims to provide a screw-wing water meter. A partition is provided on one side of the water inlet cavity of the housing and away from the inlet. The partition blocks the water flow entering the water inlet cavity, avoids the turbulent flow phenomenon caused by the direct impact of the water flow, and improves the anti-turbulence ability. At the same time, the flow guide for installing the impeller assembly is provided with a detachable structure including only an upper flow guide part and a lower flow guide part, and is respectively rotatably connected to both ends of the rotating shaft of the integrated impeller. This makes the structural features of the structure for supporting the rotating shaft of the integrated impeller fewer, effectively avoiding the problem of non-coaxiality at both ends of the rotating shaft of the integrated impeller caused by processing and assembly accuracy, and improving the installation accuracy of the rotating shaft. In addition, one end of the rotating shaft of the integrated impeller extends outside the upper flow guide part and a magnet is provided on the extended end, realizing the isolation of the magnet from the water flow, avoiding the influence of impurities such as iron filings in the water flow on the magnet, further improving the monitoring accuracy of the water meter and extending the service life.

[0005] The specific technical solutions are as follows: A screw-wing water meter includes a housing, a flow guide, and an impeller assembly. The housing has a flow channel with a water inlet and a water outlet. An inlet cavity and an outlet cavity are provided in the flow channel. The flow guide is arranged between the inlet cavity and the outlet cavity and is respectively communicated with the inlet cavity and the outlet cavity at both ends. The impeller assembly is installed in the flow guide. It has the following characteristics: A partition layer is provided in the flow channel between the inlet cavity and the outlet cavity. A perforation is provided on the partition layer. The middle part of the flow guide is arranged in the perforation. A partition is provided at the middle position on the side of the inlet cavity facing away from the water inlet. The partition extends from the bottom of the inlet cavity to the partition layer; Moreover, the flow guide includes an upper flow guide part and a lower flow guide part. Both the upper flow guide part and the lower flow guide part are arranged in a barrel shape. The barrel openings of the upper flow guide part and the lower flow guide part are arranged opposite to each other and are detachably connected to each other. The connection part between the lower flow guide part and the upper flow guide part is installed on the partition layer and respectively extends into the inlet cavity and the outlet cavity. The bottom of the lower flow guide part is communicated with the inlet cavity, and the side part of the upper flow guide part is communicated with the outlet cavity; The impeller assembly further includes an integrated impeller and a magnet. The impeller body of the integrated impeller is located in the flow guide. Both ends of the rotating shaft of the integrated impeller are respectively rotatably installed on the bottom of the barrel of the lower flow guide part and the upper flow guide part, and one end of the rotating shaft extends outside the upper flow guide part and a magnet is installed on the extended end.

[0006] In the above-mentioned screw-wing water meter, further includes a bearing cover. The bearing cover is arranged on the side of the upper flow guide part facing away from the lower flow guide part. An installation cavity is provided in the bearing cover. A bearing assembly that abuts against and / or sleeves the end of the rotating shaft is provided in the installation cavity. At the same time, the magnet is located in the installation cavity.

[0007] The above-mentioned propeller-type water meter, wherein an extended support edge is provided on the outer side wall of one end of the upper guide part away from the lower guide part and abuts against the bearing cover, and one end of the extended support edge forms a pressure relief chamber with the outer wall of the upper guide part and the bearing cover, one side of the pressure relief chamber is connected with the upper guide part, and the other side of the pressure relief chamber is connected with the water outlet chamber.

[0008] The above-mentioned propeller-type water meter, wherein an upper annular bearing and an upper bushing are arranged between the rotating shaft and the upper guide part, a push rod is arranged on the lower guide part, the push rod is coaxially arranged with the rotating shaft, and one end of the push rod is inserted into the rotating shaft, and a lower end face bearing abutting against the end of the push rod and a lower annular bearing or a lower bushing sleeved with the end of the push rod are arranged in the rotating shaft.

[0009] The above-mentioned propeller-type water meter, wherein the lower guide part includes a lower outer cylinder, a lower guide plate and an intermediate guide part, the intermediate guide part is a bowl-shaped structure and the bowl mouth is arranged toward the lower impeller body, the lower outer cylinder is coaxially sleeved outside the intermediate guide part, and a plurality of lower guide plates arranged along the axial direction of the outer cylinder are arranged between the inner wall of the lower outer cylinder and the outer wall of the intermediate guide part, and the plurality of lower guide plates are distributed in a circular array with the axis of the lower outer cylinder as the axis center, and at the same time, a mounting column with a socket is arranged in the middle of the intermediate guide part, and the end of the push rod away from the rotating shaft is inserted into the socket.

[0010] The above-mentioned propeller-type water meter, wherein the upper guide part includes an upper outer tube, an upper guide plate and an upper inner barrel, a plurality of upper guide plates are distributed on the outer wall of the upper inner barrel in a circular array with its own axis as the axis center, the barrel mouth of the upper inner barrel is arranged toward the lower outer tube and is coaxial with the lower outer tube, and at the same time, an upper outer tube is fixedly sleeved on one end outside the plurality of upper guide plates and close to the lower outer tube, and the upper outer tube is detachably connected to the lower outer tube.

[0011] The above-mentioned propeller-type water meter, wherein a water filter net is also provided outside the lower guide part, the water filter net is arranged in a barrel shape, and the water filter net is provided outside the end of the lower guide part away from the upper guide part, and the barrel mouth of the water filter net is provided with a limiting edge, and the limiting edge abuts against the barrier layer.

[0012] The above-mentioned propeller-type water meter also includes an anti-interference component, which is arranged on the top of the deflector. The anti-interference component includes an iron chip adsorbent, a fan blade and a one-way opening and closing component. The bottom of the upper inner barrel is provided with an extended ring sleeve toward the inner side of the barrel, the ring sleeve is sleeved outside the rotating shaft, and the fan blade is sleeved on the end of the rotating shaft extending to the outside of the upper deflector. At the same time, a first air vent is provided on the bearing cover, and a second air vent is provided on the bottom of the upper inner barrel, which extends and penetrates the ring sleeve axially. The iron chip adsorbent is provided on the ring sleeve and is located at the orifice of one end of the second air vent. At the same time, the one-way opening and closing component is provided at the orifice of the second air vent away from the iron chip adsorbent.

[0013] The above-mentioned wing-type water meter, wherein the one-way opening and closing member includes an opening and closing seat, an opening and closing door, a torsion spring and a sealing ring. The opening and closing seat is installed on the outer side of the bottom of the upper inner barrel and is provided with a flow-through hole corresponding to the second ventilation hole. The orifice of the flow-through hole near the second ventilation hole is flared and a bearing step is formed in the hole. At the same time, an installation hole communicating with the flow-through hole is radially formed in the opening and closing seat at one end where the bearing step is provided for the flow-through hole. One end of the opening and closing door is hinged in the installation hole, and the other end of the opening and closing door extends into the flare of the flow-through hole. The torsion spring is arranged on the hinge shaft of the opening and closing door and its two ends are respectively connected to the opening and closing door and the opening and closing seat. A sealing groove is formed in the bearing step, and a sealing ring is arranged in the sealing groove.

[0014] The above-mentioned wing-type water meter, wherein an annular groove is formed at one end of the ring sleeve provided with the iron filings adsorbing member. Along the axial direction of the ring sleeve, several limiting protrusions are arranged in the middle of the annular groove. One end of the second ventilation hole facing away from the one-way opening and closing member communicates with the annular groove. The iron filings adsorbing member is arranged in an annular shape and sleeved in the annular groove, and is located on the side of the limiting protrusion facing away from the second ventilation hole.

[0015] The positive effects of the above technical solutions are: In the above-mentioned wing-type water meter, a partition plate is arranged on the side of the water inlet cavity of the housing facing away from the water inlet. The partition plate blocks the water flow entering the water inlet cavity, avoids the turbulent flow phenomenon caused by the direct impact of the water flow, improves the anti-turbulent flow ability, and improves the monitoring accuracy. At the same time, the impeller assembly is installed in the flow guide device, and the flow guide device is obtained by combining an upper flow guide part and a lower flow guide part, and the two ends of the rotating shaft of the integrated impeller are respectively rotationally supported by the upper flow guide part and the lower flow guide part. The structure for supporting the rotating shaft of the integrated impeller is only two directly connected structural supports, with fewer matching structural features, effectively avoiding the risk of non-coaxiality at both ends of the rotating shaft of the integrated impeller caused by machining and assembly accuracy, and the installation accuracy of the rotating shaft is higher. In addition, one end of the rotating shaft of the integrated impeller extends outside the upper flow guide part and a magnet is arranged, so that the magnet can be isolated from the water flow, avoiding the influence of impurities such as rust in the water flow on the magnet, further improving the monitoring accuracy of the water meter and prolonging the service life. Description of the Drawings

[0016] Figure 1 It is a structural diagram of an embodiment of a wing-type water meter of the present invention; Figure 2 It is a cross-sectional view of a wing-type water meter of the present invention; Figure 3 It is a structural diagram of the housing of a wing-type water meter of the present invention; Figure 4 It is Figure 2 The enlarged view of part A in

[0017] In the attached drawings: 1. Housing; 11. Water inlet; 12. Water outlet; 13. Water inlet chamber; 14. Water outlet chamber; 15. Partition layer; 16. Baffle; 2. Flow deflector; 21. Upper flow deflector part; 22. Lower flow deflector part; 23. Upper annular bearing; 24. Upper bushing; 25. Thrust rod; 26. Lower end face bearing; 27. Lower annular bearing; 211. Support edge; 212. Pressure relief chamber; 213. Upper outer cylinder; 214. Upper flow deflector plate; 215. Upper inner barrel; 216. Ring sleeve; 217. Second vent hole; 221. Lower outer cylinder; 222. Lower flow deflector plate; 223. Intermediate guiding part; 224. Mounting post; 225. Filter screen; 2161. Annular groove; 2162. Limit projection; 3. Impeller assembly; 31. Integral impeller; 32. Magnet; 4. Bearing cover; 41. Mounting chamber; 42. Bearing assembly; 43. First vent hole; 5. Anti-interference assembly; 51. Iron chip adsorbent; 52. Fan blade; 53. One-way opening and closing part; 531. Opening and closing seat; 532. Opening and closing door; 533. Torsion spring; 534. Sealing ring; 5311. Flow through hole; 5312. Mounting hole. Specific embodiments

[0018] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 to the attached Figure 4 to specifically elaborate on the technical solutions provided by the present invention, but the following content is not a limitation of the present invention.

[0019] Figure 1 is a structural diagram of an embodiment of a screw-wing water meter of the present invention; Figure 2 is a cross-sectional view of a screw-wing water meter of the present invention; Figure 3 is a structural diagram of the housing of a screw-wing water meter of the present invention. As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the screw-wing water meter provided in this embodiment includes: a housing 1, a flow deflector 2 and an impeller assembly 3. At this time, a flow channel is provided in the housing 1, and the two ends of the flow channel are respectively a water inlet 11 and a water outlet 12, and an inlet chamber 13 and an outlet chamber 14 are provided in the middle of the flow channel. And the flow deflector 2 is arranged in the flow channel in the housing 1 and is located between the inlet chamber 13 and the outlet chamber 14. At the same time, the two ends of the flow deflector 2 are respectively communicated with the inlet chamber 13 and the outlet chamber 14. In addition, the impeller assembly 3 is installed in the flow deflector 2, so that the water flow enters the inlet chamber 13 from the water inlet 11 and then flows into the flow deflector 2. The water flow entering the flow deflector 2 drives the impeller assembly 3 to rotate to realize the monitoring of the water flow, and the water flow driving the impeller assembly 3 to rotate then flows out of the flow deflector 2 into the outlet chamber 14 and is discharged through the water outlet 12.

[0020] Specifically, a barrier layer 15 is provided in the flow channel of the shell 1 and between the water inlet chamber 13 and the water outlet chamber 14, and the water inlet chamber 13 and the water outlet chamber 14 are separated by the barrier layer 15. At this time, a perforation is opened on the barrier layer 15, and the middle part of the deflector 2 is arranged in the perforation, so that the water in the water inlet chamber 13 can only flow to the water outlet chamber 14 after passing through the perforated deflector 2, which provides conditions for the subsequent water flow to drive the impeller assembly 3 in the deflector 2 to rotate. In addition, a partition 16 is provided in the water inlet chamber 13 and in the middle position on the side away from the water inlet 11. Preferably, the partition 16 is extended from the bottom of the water inlet chamber 13 to the barrier layer 15. The partition 16 forms a blocking structure on the side of the water inlet chamber 13 away from the water inlet 11, so that the water flow will be blocked by the partition 16 at the end position after entering the water inlet chamber 13 from the water inlet 11, thereby avoiding the direct impact of the water flow to form turbulence, reducing the influence of the turbulence on the rotation of the impeller assembly 3, and improving the monitoring accuracy.

[0021] More specifically, the deflector 2 installed between the water inlet chamber 13 and the water outlet chamber 14 includes an upper deflector 21 and a lower deflector 22. At this time, the upper deflector 21 and the lower deflector 22 are arranged in a barrel shape. At this time, the barrel openings of the upper deflector 21 and the lower deflector 22 are arranged relative to each other and are detachably connected to each other, so that the upper deflector 21 and the lower deflector 22 can be combined to have a larger cavity, through which the impeller assembly 3 is installed and the impeller assembly 3 is rotated. In addition, the connection between the lower deflector 22 and the upper deflector 21 is installed above and below the barrier layer 15, so that the deflector 2 is installed in the housing 1, that is, the deflector 2 is supported in the flow channel of the housing 1 by the barrier layer 15, and the structural stability is better. Furthermore, the lower guide portion 22 and the upper guide portion 21 extend into the water inlet chamber 13 and the water outlet chamber 14 respectively. At the same time, the bottom of the lower guide portion 22 is connected to the water inlet chamber 13, and the side of the upper guide portion 21 is connected to the water outlet chamber 14, so that the water flow in the water inlet chamber 13 can enter the deflector 2 through the lower guide portion 22 to drive the impeller assembly 3 to rotate, and the water flow in the deflector 2 can flow to the water outlet chamber 14 through the upper guide portion 21, and the water flow can be guided by the deflector 2 to make the water flow flow in one direction, thereby providing conditions for subsequently driving the impeller assembly 3 to rotate.

[0022] More specifically, the impeller assembly 3 disposed within the flow deflector 2 further includes an integral impeller 31 and a magnet 32. At this time, the impeller body of the integral impeller 31 is disposed within the flow deflector 2, and both ends of the rotating shaft of the integral impeller 31 are rotatably mounted on the bottom of the lower flow deflector portion 22 and the upper flow deflector portion 21, such that the integral impeller 31 can be stably mounted within the flow deflector 2 through its rotating shaft, and the integral impeller 31 can be rotated within the flow deflector 2 through the rotating shaft, enabling the water flow entering the flow deflector 2 and flowing in one direction to drive the integral impeller 31 to rotate. Moreover, the flow direction of the water flow is consistent with the axial direction of the rotating shaft of the integral impeller 31, achieving axial impact on the impeller and meeting the usage requirements of the screw-wing water meter. Additionally, one end of the rotating shaft of the integral impeller 31 extends outside the upper flow deflector portion 21, and a magnet 32 is mounted on the extended end, such that the magnet 32 can be synchronously driven to rotate when the integral impeller 31 rotates, providing conditions for subsequent cooperation with other structures. Also, the magnet 32 can be located outside the flow deflector 2 for water flow, achieving isolation of the magnet 32 from the water flow, thereby avoiding the problem of rust and other impurities in the water flow being adsorbed by the magnet 32, preventing the influence of rust and other impurities in the water flow on the impeller assembly 3, further improving the monitoring accuracy of the water meter, and extending the service life of the water meter.

[0023] More specifically, a bearing cover 4 is further provided on the flow deflector portion. At this time, the bearing cover 4 is disposed on the side of the upper flow deflector portion 21 facing away from the lower flow deflector portion 22, that is, the bearing cover 4 is located outside the extended end of the rotating shaft of the integral impeller 31. Moreover, an installation cavity 41 is provided within the bearing cover 4. Meanwhile, a bearing assembly 42 that abuts against and / or sleeves the end of the rotating shaft is provided within the installation cavity 41. When the magnet 32 is mounted on the end of the rotating shaft extending outside the flow deflector portion, the magnet 32 is located within the installation cavity 41 of the bearing cover 4, that is, the bearing cover 4 provides a protective space for the magnet 32 to achieve outer protection. Meanwhile, the bearing assembly 42 can also provide support for the rotating shaft of the integral impeller 31, reducing wear and extending the service life. Preferably, the bearing assembly 42 within the installation cavity 41 is an upper-end face bearing that abuts against the end of the rotating shaft, restricting the axial movement of the bearing, preventing the rotating shaft from axially moving when the integral impeller 31 is impacted by the water flow and buoyed by the water, being able to restrict its axial movement to achieve position fixation, ensuring stable and reliable structure, and also preventing wear, meeting the usage requirements of the rotating shaft rotation.

[0024] More specifically, a support edge 211 extending outwards is further provided on the outer side wall of the upper diversion part 21 at the end departing from the lower diversion part 22. At this time, the support edge 211 and the upper diversion part 21 are of an integral structure, with better integrity. Meanwhile, the support edge 211 is abutted against the bearing cover 4, and the end where the support edge 211 extends out and the outer wall of the upper diversion part 21 and the bearing cover 4 form a pressure relief cavity 212, that is, a cavity can be formed through the support edge 211, the outer wall of the upper diversion part 21 and the bearing cover 4, and this cavity is used for pressure relief operation. At this time, one side of the pressure relief cavity 212 is communicated with the upper diversion part 21, and the other side of the pressure relief cavity 212 is communicated with the water outlet cavity 14, so that when the water pressure of the water flow changes and there is more air in the water flow, the pressure relief operation can be carried out through the pressure relief cavity 212, thereby reducing the influence of factors such as water pressure change on the monitoring accuracy of the water meter and further improving the monitoring accuracy of the water meter.

[0025] More specifically, an upper annular bearing 23 and an upper bushing 24 are further provided between the rotating shaft and the upper diversion part 21. The upper annular bearing 23 and the upper bushing 24 provide support for the installation of the rotating shaft on the upper diversion part 21, reduce friction and wear, improve stability, and extend the service life. In addition, a push rod 25 is provided on the lower diversion part 22. At this time, the push rod 25 is coaxially arranged with the rotating shaft, a slot is opened on the end face of the end of the rotating shaft that cooperates with the push rod 25, and one end of the push rod 25 is inserted into the slot of the rotating shaft, that is, the lower diversion part 22 supports the rotating shaft through the push rod 25. In addition, a lower end face bearing 26 abutted against the end of the push rod 25 and a lower annular bearing 27 or a lower bushing sleeved on the end of the push rod 25 are further provided in the slot of the rotating shaft. The support of the rotating shaft on the lower diversion part 22 is realized through the lower end face bearing 26 and the lower annular bearing 27 or the lower bushing, and the friction and wear can also be reduced, and the stability and service life can be improved.

[0026] More specifically, the lower guide part 22 of the guide 2 includes a lower outer cylinder 221, a lower guide plate 222 and an intermediate guide part 223. At this time, the intermediate guide part 223 is arranged in a bowl-shaped structure, and the bowl mouth of the intermediate guide part 223 is arranged toward the lower impeller body, so that the arc-shaped bowl bottom of the intermediate guide part 223 is arranged toward the water inlet chamber 13, so that the water flow of the water inlet chamber 13 can be guided by the arc-shaped bowl bottom of the intermediate guide part 223 when entering the lower guide part 22, so that the water flow can be gathered toward the outside of the intermediate guide part 223. In addition, the lower outer cylinder 221 is coaxially sleeved outside the intermediate guide part 223, so that the spacing between each part of the intermediate guide part 223 and the lower outer cylinder 221 is the same, thereby ensuring that the water flow can pass through the lower guide part 22 evenly. In addition, a plurality of lower guide plates 222 arranged along the axial direction of the outer cylinder are provided between the inner wall of the lower outer cylinder 221 and the outer wall of the intermediate guide portion 223. The connection between the intermediate guide portion 223 and the lower outer cylinder 221 is realized through the lower guide plates 222, so that the intermediate guide portion 223 can be stably installed in the lower outer cylinder 221. In addition, the plurality of lower guide plates 222 are arranged in a circular array with the axis of the lower outer cylinder 221 as the axis center, so that the plurality of lower guide plates 222 are evenly distributed between the lower outer cylinder 221 and the intermediate guide portion 223, so that the water flow passing through the lower guide portion 22 is guided by the lower guide plates 222 after being collected by the intermediate guide portion 223, so as to ensure that the flow direction of the water flow is the axial direction of the rotating shaft of the integrated impeller 31, thereby smoothly driving the impeller assembly 3 to rotate. At the same time, a mounting column 224 with a socket is also provided in the middle of the intermediate guide portion 223. During assembly, the end of the top rod 25 connected to the rotating shaft facing away from the rotating shaft is inserted into the socket, that is, the mounting column 224 provides conditions for the installation of the top rod 25 in the lower guide portion 22.

[0027] More specifically, the upper diversion part 21 of the flow deflector 2 further includes an upper outer cylinder 213, upper diversion plates 214, and an upper inner cylinder 215. During installation, a number of upper diversion plates 214 are annularly arrayed on the outer wall of the upper inner cylinder 215 with its own axis as the center. At the same time, the mouth of the upper inner cylinder 215 is arranged facing the lower outer cylinder 221 and is coaxial with the lower outer cylinder 221, so that the water flow of the impact impeller assembly 3 can smoothly enter the space outside the upper inner cylinder 215. In addition, an upper outer cylinder 213 is fixedly sleeved outside a number of upper diversion plates 214 and near one end of the lower outer cylinder 221. The upper inner cylinder 215 and the upper outer cylinder 213 are stably connected through the upper diversion plates 214. At the same time, the water flow entering the space outside the upper inner cylinder 215 can be discharged into the water outlet cavity 14 from above the upper outer cylinder 213, and is guided by the upper diversion plates 214 during the discharge process into the water outlet cavity 14, further reducing the interference of the discharged water flow on the impeller assembly 3, and the structural design is more reasonable. In addition, when assembling the upper diversion part 21 and the lower diversion part 22, the upper outer cylinder 213 and the lower outer cylinder 221 are detachably connected. That is, the cooperation and installation of the upper diversion part 21 and the lower diversion part 22 are realized through the connection of the upper outer cylinder 213 and the lower outer cylinder 221 to form the overall flow deflector 2. After the two are disassembled, the installation and replacement of the impeller assembly 3 inside the flow deflector 2 can be realized, and the structural design is more reasonable.

[0028] More specifically, a filter mesh 225 is also sleeved outside the lower diversion part 22 of the flow deflector 2. At this time, the filter mesh 225 is arranged in a barrel shape, and the filter mesh 225 is sleeved outside one end of the lower diversion part 22 facing away from the upper diversion part 21, so that the water flow needs to be filtered by the filter mesh 225 first when entering the lower diversion part 22, reducing the influence of impurities on the impeller assembly 3, improving the monitoring accuracy, and at the same time prolonging the service life of the water meter. And a limiting edge is provided at the mouth of the filter mesh 225. When the flow deflector 2 is installed on the partition layer 15 inside the housing 1, the limiting edge abuts against the partition layer 15, and the filter mesh 225 is pressed by the flow deflector 2, realizing the stable installation of the filter mesh 225 in the flow channel.

[0029] Figure 4 is Figure 2 The enlarged view of part A in. As Figure 2 and Figure 4As shown, an anti-interference component 5 is further provided inside the housing 1. During assembly, the anti-interference component 5 is arranged on the top of the flow deflector 2 so that the anti-interference component 5 can act on the area where the magnet 32 is located, further reducing the influence of impurities such as rust in the water flow on the magnet 32. At this time, the anti-interference component 5 further includes an iron filings adsorbent 51, a fan blade 52 and a one-way opening and closing member 53. An extended ring sleeve 216 is provided on the bottom of the upper inner barrel 215 facing the inner side of the barrel. Preferably, the ring sleeve 216 and the upper inner barrel 215 are of an integral structure, with better integrity and higher structural strength. In addition, the ring sleeve 216 is sleeved outside the rotating shaft, that is, the rotating shaft passes through the ring sleeve 216 to meet the rotation requirement of the rotating shaft. And the fan blade 52 is sleeved on one end of the rotating shaft extending outside the upper flow guiding part 21, so that the rotation of the rotating shaft can synchronously drive the fan blade 52 to rotate, thereby forming an air flow in the installation cavity 41 of the bearing cover 4. At the same time, a first ventilation hole 43 is opened on the bearing cover 4 to maintain the smoothness of the air passage and ensure that the air flow can be smoothly formed. It should be noted that a channel corresponding to and communicating with the first ventilation hole 43 is opened on the housing 1, so as to realize the replenishment of gas and ensure that the fan blade 52 in the installation cavity 41 can smoothly form an air flow when rotating. In addition, a second ventilation hole 217 extending and axially penetrating the ring sleeve 216 is further opened on the bottom of the upper inner barrel 215, and the iron filings adsorbent 51 is arranged on the ring sleeve 216 and at the orifice of one end of the second ventilation hole 217, so that the air flow formed by the rotation of the fan blade 52 in the installation cavity 41 of the bearing cover 4 can blow the rust and other impurities adsorbed on the iron filings adsorbent 51 through the orifice of the second ventilation hole 217, and then be discharged along with the water flow. It should be noted that a one-way valve is provided in the channel on the housing 1 for communicating with the first ventilation hole 43, which can meet the gas pumping requirement and prevent the problem of the formed air flow from discharging reversely, so as to ensure that the formed air flow can smoothly blow through the second ventilation hole 217 to the iron filings adsorbent 51. In addition, since the ring sleeve 216 is a structure extending towards the inner side of the barrel of the upper inner barrel 215, one end of the ring sleeve 216 sleeved with the iron filings adsorbent 51 can be far away from the magnet 32, so that the iron filings adsorbent 51 can be synchronously far away from the magnet 32 and will not interfere with the magnet 32. And since the ring sleeve 216 is sleeved outside the rotating shaft, the part where the rotating shaft passes through the upper inner barrel 215 is located at the iron filings adsorbent 51, so that the water flow accidentally entering from the fitting gap between the rotating shaft and the upper inner barrel 215 will first pass through the iron filings adsorbent 51. At this time, the iron filings adsorbent 51 can adsorb impurities such as rust in the water body, so that even if the water flow leaks accidentally into the installation cavity 41 where the magnet 32 is located through the fitting gap between the rotating shaft and the upper inner barrel 215, there will be no rust and other impurities interfering with the magnet 32, and the structural design is more reasonable.Meanwhile, the one-way opening and closing member 53 is arranged at the orifice of the second ventilation hole 217 away from the iron filings attracting member 51, so that after the air flow is formed by the rotation of the fan blade 52, the air flow can enter the second ventilation hole 217 after passing through the one-way opening and closing member 53, and at the same time, it can prevent the problem that water flows reversely from the second ventilation hole 217 into the installation cavity 41 when there is no air flow or the air flow is weak, and the protection performance is better.

[0030] More specifically, the one-way opening and closing member 53 further includes an opening and closing seat 531, an opening and closing door 532, a torsion spring 533 and a sealing ring 534. During installation, the opening and closing seat 531 is installed on the outer side of the bottom of the upper inner barrel 215 and is provided with a through hole 5311 corresponding to the second ventilation hole 217, that is, the opening and closing seat 531 is installed in the installation cavity 41. At this time, the orifice of the through hole 5311 close to the second ventilation hole 217 is set to be flared and a abutting step is formed in the hole, which expands the space between the through hole 5311 and one end of the second ventilation hole 217, providing space for the subsequent installation and movement of the opening and closing door 532. At the same time, an installation hole 5312 is provided on the opening and closing seat 531 at one end where the abutting step of the through hole 5311 is located, and the installation hole 5312 is arranged along the radial direction of the through hole 5311 and communicates with the through hole 5311, and one end of the opening and closing door 532 is hinged in the installation hole 5312. At the same time, the other end of the opening and closing door 532 extends into the flare of the through hole 5311, so that the opening and closing door 532 realizes the closing and opening of the through hole 5311 by flipping. In addition, the torsion spring 533 is arranged on the hinge shaft of the opening and closing door 532 and its two ends are respectively connected to the opening and closing door 532 and the opening and closing seat 531, so that in the initial state, the torsion spring 533 can make the opening and closing door 532 close to the abutting step to close the through hole 5311, and the opening and closing door 532 will move away from the abutting step to open the through hole 5311 only after an air flow is generated and a certain pressure has been generated in the installation cavity 41, and it can be automatically reset by the torsion spring 533 after being opened, so that there will be no reverse leakage problem when the impeller assembly 3 rotates at a low speed or does not rotate, avoiding the problem that the anti-interference component 5 is started every time water is used, realizing the intermittent start of the anti-interference component 5, and the structural design is more reasonable. And when the impeller assembly 3 rotates to open the through hole 5311 by the opening and closing door 532, the air flow can also prevent the water from flowing reversely into the second ventilation hole 217 when blowing out through the second ventilation hole 217, that is, it ensures that the water can be prevented from flowing reversely after the anti-interference component 5 is started. In addition, a sealing groove is also provided on the abutting step, and a sealing ring 534 is arranged in the sealing groove, and the sealing effect between the opening and closing door 532 and the abutting step is increased through the sealing ring 534, and the structural design is more reasonable.

[0031] More specifically, an annular groove 2161 is formed on the outer wall of one end of the ring sleeve 216 where the iron filings adsorbent 51 is provided. Along the axial direction of the ring sleeve 216, a number of limiting protrusions 2162 are arranged in the middle of the annular groove 2161, so that the limiting protrusions 2162 can divide the annular groove 2161 into two parts. Moreover, the end of the second ventilation hole 217 away from the one-way opening and closing member 53 is communicated with the annular groove 2161, so that the airflow blown out from the second ventilation hole 217 can blow into the annular groove 2161. During assembly, the iron filings adsorbent 51 is arranged in a ring shape and sleeved in the annular groove 2161, and the iron filings adsorbent 51 is arranged on the side of the limiting protrusion 2162 away from the second ventilation hole 217, so that the iron filings adsorbent 51 can be limited by the limiting protrusion 2162 on the side of the annular groove 2161 away from the second ventilation hole 217, so that there is a gap between the orifice of the second ventilation hole 217 and the iron filings adsorbent 51, avoiding the problem that the iron filings adsorbent 51 blocks the orifice of the second ventilation hole 217 and causes the airflow to not be blown out, ensuring that the airflow blown out from the second ventilation hole 217 can act on the iron filings adsorbent 51 to blow away the rust and the like adsorbed on the iron filings adsorbent 51, further avoiding the problem that rust and other impurities in the water flow enter the installation cavity 41 from the assembly gap between the rotating shaft and the upper guide part 21 and interfere with the magnet 32 in the installation cavity 41, further ensuring the monitoring accuracy of the water meter and prolonging the service life.

[0032] The helical vane water meter provided in this embodiment includes a housing 1, a flow deflector 2 and an impeller assembly 3; by providing a partition 16 in the water inlet cavity 13 of the flow channel of the housing 1 and on the side far from the water inlet 11, the water flow entering the water inlet cavity 13 can be blocked at the far end, avoiding the influence of turbulent flow caused by direct impact of the water flow, improving the monitoring accuracy. At the same time, the impeller assembly 3 is rotatably installed in the flow deflector 2 directly formed by combining only the upper guide part 21 and the lower guide part 22, making the structure for supporting the impeller assembly 3 simpler and having fewer structures that need to cooperate with each other, thus avoiding the problem of non - coaxiality at both ends of the rotating shaft of the integral impeller 31 caused by machining and assembly accuracy, reducing structural errors. In addition, one end of the rotating shaft of the integral impeller 31 is extended outside the flow deflector 2 and then the magnet 32 is installed, isolating the magnet 32 from the water flow, avoiding the problem that the magnet 32 is interfered by rust and other impurities existing in the water flow, further improving the monitoring accuracy of the water meter and prolonging the service life.

[0033] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral vane water meter, comprising a housing, a flow deflector and an impeller assembly. The housing has a flow channel with a water inlet and a water outlet. An inlet chamber and an outlet chamber are arranged in the flow channel. The flow deflector is arranged between the inlet chamber and the outlet chamber and is respectively communicated with the inlet chamber and the outlet chamber at both ends. The impeller assembly is installed in the flow deflector, and is characterized in that, include: A barrier layer is provided in the flow channel and between the water inlet cavity and the water outlet cavity, the barrier layer is provided with a perforation, the middle part of the flow guide is provided in the perforation, a partition is provided in the water inlet cavity and in the middle position on the side away from the water inlet, the partition extends from the bottom of the water inlet cavity to the barrier layer; Furthermore, the deflector comprises an upper deflector and a lower deflector, the upper deflector and the lower deflector are both arranged in a barrel shape, the barrel openings of the upper deflector and the lower deflector are arranged opposite to each other and are detachably connected to each other, the connection between the lower deflector and the upper deflector is installed on the barrier layer and extends into the water inlet cavity and the water outlet cavity respectively, the bottom of the lower deflector is communicated with the water inlet cavity, and the side of the upper deflector is communicated with the water outlet cavity; The impeller assembly further includes an integrated impeller and a magnet. The impeller body of the integrated impeller is located in the deflector. Both ends of the rotating shaft of the integrated impeller are rotatably mounted on the barrel bottoms of the lower deflector and the upper deflector, respectively. One end of the rotating shaft extends outside the upper deflector and the magnet is mounted on the extended end.

2. The vane type water meter according to claim 1, wherein It also includes a bearing cover, which is arranged on the side of the upper guide part away from the lower guide part. The bearing cover is provided with an installation cavity, and the installation cavity is provided with a bearing assembly that abuts and / or sleeves with the end of the rotating shaft. At the same time, the magnet is located in the installation cavity.

3. The vane type water meter according to claim 2, wherein, An extended support edge is provided on the outer side wall of one end of the upper guide part away from the lower guide part and abuts against the bearing cover, and one end of the extended support edge forms a pressure relief chamber with the outer wall of the upper guide part and the bearing cover, one side of the pressure relief chamber is connected with the upper guide part, and the other side of the pressure relief chamber is connected with the water outlet chamber.

4. The vane type water meter according to claim 1, characterized in that, An upper annular bearing and an upper bushing are arranged between the rotating shaft and the upper guide part, a push rod is arranged on the lower guide part, the push rod is coaxially arranged with the rotating shaft, and one end of the push rod is inserted into the rotating shaft, and a lower end face bearing abutting against the end of the push rod and a lower annular bearing or a lower bushing sleeved with the end of the push rod are arranged in the rotating shaft.

5. The vane type water meter according to claim 4, wherein, The lower guide portion includes a lower outer tube, a lower guide plate and an intermediate guide portion, the intermediate guide portion is a bowl-shaped structure with the bowl mouth arranged toward the impeller body, the lower outer tube is coaxially sleeved outside the intermediate guide portion, and a plurality of lower guide plates arranged along the axial direction of the lower outer tube are provided between the inner wall of the lower outer tube and the outer wall of the intermediate guide portion, and the plurality of lower guide plates are distributed in a circular array with the axis of the lower outer tube as the axis center, and at the same time, a mounting column with a socket is provided in the middle of the intermediate guide portion, and the end of the push rod facing away from the rotating shaft is inserted into the socket.

6. The vane type water meter according to claim 5, characterized in that, The upper flow guiding part includes an upper outer cylinder, upper flow guiding plates and an upper inner barrel. A plurality of upper flow guiding plates are distributed in a circular array on the outer wall of the upper inner barrel with the axis of the upper inner barrel as the center. The opening of the upper inner barrel faces the lower outer cylinder and is coaxial with the lower outer cylinder. At the same time, the upper outer cylinder is fixedly sleeved at one end of the plurality of upper flow guiding plates close to the lower outer cylinder, and the upper outer cylinder is detachably connected to the lower outer cylinder.

7. The vane type water meter according to claim 5 or 6, characterized in that A water filtering net is further sleeved outside the lower flow guiding part. The water filtering net is arranged in a barrel shape and is sleeved outside one end of the lower flow guiding part facing away from the upper flow guiding part. And a limiting edge is arranged at the opening of the water filtering net, and the limiting edge abuts against the partition layer.

8. The vane type water meter according to claim 6, characterized in that, It further includes an anti-interference component. The anti-interference component is arranged at the top of the flow guide device. The anti-interference component includes an iron filings adsorbing part, a fan blade and a one-way opening and closing part. A ring sleeve extending towards the inner side of the barrel is arranged at the bottom of the upper inner barrel, and the ring sleeve is sleeved outside the rotating shaft. The fan blade is sleeved on one end of the rotating shaft extending outside the upper flow guiding part. At the same time, a first ventilation hole is opened on the bearing cover, and a second ventilation hole extending and axially penetrating the ring sleeve along the ring sleeve is opened on the bottom of the upper inner barrel. The iron filings adsorbing part is arranged on the ring sleeve and at the orifice of one end of the second ventilation hole, and at the same time, the one-way opening and closing part is arranged at the orifice of the other end of the second ventilation hole facing away from the iron filings adsorbing part.

9. The vane type water meter according to claim 8, wherein, The one-way opening and closing part includes an opening and closing seat, an opening and closing door, a torsion spring and a sealing ring. The opening and closing seat is installed outside the bottom of the upper inner barrel and is provided with a through hole corresponding to the second ventilation hole. The orifice of one end of the through hole close to the second ventilation hole is flared and forms a abutting step in the hole. At the same time, an installation hole communicating with the through hole is opened on the opening and closing seat along the radial direction of the through hole at one end where the abutting step is arranged in the through hole. One end of the opening and closing door is hinged in the installation hole, and the other end of the opening and closing door extends into the flare of the through hole. The torsion spring is arranged on the hinge shaft of the opening and closing door and is respectively connected to the opening and closing door and the opening and closing seat at both ends. A sealing groove is opened on the abutting step, and the sealing ring is arranged in the sealing groove.

10. The vane type water meter according to claim 9, characterized in that, An annular groove is opened at one end of the ring sleeve where the iron filings adsorbing part is arranged. Along the axial direction of the ring sleeve, a plurality of limiting protrusions are arranged in the middle of the annular groove. The other end of the second ventilation hole facing away from the one-way opening and closing part is communicated with the annular groove. The iron filings adsorbing part is arranged in an annular shape and is sleeved in the annular groove and is located on the side of the limiting protrusion facing away from the second ventilation hole.

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