Flow sensor

Abstract

The invention relates to the technical field of sensors, in particular to a flow sensor. Comprising a pipeline, a first moving ring, a flow guide piece, a turbine set, a second moving ring and a frequency sensor. When the flow is large, liquid flows along the pipeline to impact the turbine set, the turbine set rotates, and the flow of the liquid is calculated; when the flow is small, the liquid flows along the polygonal pipeline to impact the first turbine, the first turbine rotates, and the flow of the liquid is calculated, that is, the polygonal pipeline is small in sectional area relative to the pipeline, the pressure intensity of the small-flow liquid can be increased, the first turbine is light in weight, the process of adjusting the flowing direction of the liquid is automatically completed, and therefore the flow detection range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a flow sensor. Background Art

[0002] Flow sensors are used to detect the flow rate of a passing fluid, and the flow rate of the fluid is often affected by the size of the channel diameter. In the prior art, a turbine flow sensor uses the passing fluid to drive the turbine to rotate, measures the speed of the turbine rotation, and obtains the speed of the passing fluid, thereby calculating the flow rate. However, when the flow rate is small, since the diameter of the measuring channel is fixed and the size of the turbine is large, the turbine will rotate slowly or remain stationary, and the accuracy of the flow rate detection cannot be guaranteed. Therefore, the flow sensor in the prior art cannot adjust the diameter of the pipeline according to different flow ranges (i.e., large flow, small flow), resulting in a narrow flow detection range. Summary of the invention

[0003] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is to provide a flow sensor that automatically adjusts the diameter of the pipeline according to the flow rate to meet the needs of the flu sensor to detect different flow ranges. The present invention achieves the above purpose through the following technical solutions:

[0004] A flow sensor comprises: a pipeline, a first moving ring, a flow guide, a turbine group, a second moving ring, and a frequency sensor;

[0005] The first moving ring, the guide member, the turbine group, and the second moving ring are located in the pipeline, the first moving ring and the second moving ring are located in the water inlet pipe and the water outlet pipe of the pipeline respectively, the turbine group is located in the middle of the pipeline, the number of the guide members is two, the two guide members are arranged in opposite directions, the two guide members are located between the turbine group and the first moving ring and the second moving ring respectively, and the frequency sensor is located above the turbine group;

[0006] The guide member comprises: a diverter plate, an inner ring, a sleeve, a guide column, and a rotating plate. There are multiple diverter plates, and the multiple diverter plates are arranged radially with the guide column as the axis. The inner ring is fixed with the multiple diverter plates, and the number of the rotating plates is the same as that of the diverter plates. A rotating shaft is respectively provided at the middle of both ends of the rotating plate, and the rotating plate is rotatably connected with the diverter plate, and the connection is located in the inner ring. A limited sliding groove is provided on the rotating shaft of the rotating plate, and the limited sliding groove limits the rotating plate to rotate ninety degrees in one direction. The rotating plate is provided with blades;

[0007] Springs are respectively arranged at the opposite ends of the first moving ring and the second moving ring. The first moving ring and the second moving ring are slidably connected with the pipeline. An impact surface is arranged at one end of the first moving ring facing the water inlet of the pipeline 1. An extension portion is arranged at the other end of the first moving ring. The extension portion is located inside the plurality of rotating plates. A plurality of circular holes are arranged on the end surface of the first moving ring facing the plurality of rotating plates, and protrusions 1 are respectively arranged in the plurality of circular holes. The rotating shafts of the plurality of rotating plates are respectively inserted into the plurality of circular holes, and the plurality of protrusions 1 are respectively engaged in the plurality of limiting sliding grooves; a hole is arranged on the second moving ring, and protrusions 2 are arranged in the hole. The rotating shafts in the plurality of rotating plates in the water outlet pipe are inserted into the hole, and the protrusions 2 are engaged in the limiting sliding grooves;

[0008] The turbine group comprises: a turbine 1, a turbine 2, and a spring sheet, wherein the turbine 1 is provided with a plurality of magnets, a sleeve 1 is nested on the turbine 1, a gear ring is provided at one end of the sleeve, a sleeve 2 is provided at the axis of the turbine 2, the sleeve 2 is nested on the sleeve 1, a plurality of teeth are provided on the sleeve 2, and a plurality of spring sheets are provided between the sleeve 1 and the sleeve 2;

[0009] Preferably, the limiting sliding groove is composed of four horizontal grooves and four vertical grooves connected to each other. The four horizontal grooves are arranged at 90 degrees, and the four vertical grooves are staggered to connect the ends of the four horizontal grooves.

[0010] Preferably, a magnetic steel and a coil are provided inside the frequency sensor, and the magnetic flux lines of the magnet can be periodically cut by the frequency sensor, thereby generating an induction signal in the coil; the frequency sensor sends the induction signal to the signal processor, and the signal processor amplifies, filters, and processes the induction signal to accurately calculate the changing frequency of the induction signal, and the speed of the turbine group can be accurately calculated by the changing frequency of the induction signal.

[0011] Preferably, two micro-touch switches are arranged in the pipeline, and the two micro-touch switches are used to switch between a large flow mode and a small flow mode.

[0012] Beneficial effects of the present invention:

[0013] When the flow rate is large, the liquid flows along the pipeline and impacts the turbine group, and the turbine group rotates, and the flow rate of the liquid is calculated; when the flow rate is small, the liquid flows along the polygonal pipeline and impacts the turbine one, and the turbine one rotates, and the flow rate of the liquid is calculated. That is, the polygonal pipeline is small relative to the pipeline cross-sectional area, which can increase the pressure of the liquid with a small flow rate. The weight of the turbine one is light, and the process of adjusting the flow direction of the liquid is automatically completed, so that the range of flow detection is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the decomposition structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the flow guide member of the present invention.

[0017] Figure 4 It is a schematic diagram of the rotating plate structure of the present invention.

[0018] Figure 5 It is a schematic diagram of the limiting slide structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the first dynamic ring structure of the present invention.

[0020] Figure 7 It is a schematic diagram of the rotation of the rotating plate of the present invention.

[0021] Figure 8 It is a schematic diagram of the exploded structure of the turbine assembly of the present invention.

[0022] Fig. 9 It is a schematic diagram of the structure of the turbine group of the present invention.

[0023] Fig.10 This is a schematic diagram of the second dynamic ring structure of the present invention.

[0024] Fig.11 It is a schematic diagram of the structure of one side of the second moving ring of the present invention. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that it is easy for those with ordinary skills in the prior art to implement these embodiments. However, the present invention can also be implemented in various different forms. Therefore, the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, parts that are not connected with the invention will be omitted from the accompanying drawings.

[0026] like Figure 1 As shown, a flow sensor comprises: a pipeline 1, a first moving ring 2, a flow guide 3, a turbine group 4, a second moving ring 5, and a frequency sensor 6;

[0027] The two ends of the pipeline 1 are respectively an inlet pipe and an outlet pipe, the first moving ring 2, the guide member 3, the turbine group 4, and the second moving ring 5 are located in the pipeline 1, the first moving ring 2 and the second moving ring 5 are respectively located in the inlet pipe and the outlet pipe of the pipeline 1, the turbine group 4 is located in the middle of the pipeline 1, the number of the guide members 3 is two, the two guide members 3 are arranged in opposite directions, and the two guide members 3 are respectively located between the turbine group 4 and the first moving ring 2 and the second moving ring 5, that is, the two guide members 3 are respectively located in the inlet pipe and the outlet pipe;

[0028] like Figure 2-3As shown, the guide member 3 includes: a diverter plate 31, an inner ring 32, a sleeve 33, a guide column 34, and a rotating plate 30. The guide column 33 is in the same straight line as the axis of the pipeline 1, and the guide column 33 gradually expands along the end facing the turbine group 4. There are multiple diverter plates 31, and the multiple diverter plates 31 are radially arranged with the guide column 33 as the axis. The diverter plates 31 are connected to the inner wall of the pipeline 1, and the inner ring 32 is fixed to the multiple diverter plates 31. The ends of the multiple diverter plates 31 facing the first moving ring 2 are respectively provided with sleeves 33, and the multiple sleeves 33 are located in the inner ring 32. The number of the rotating plates 30 is the same as that of the diverter plates 31;

[0029] like Figure 4 As shown, the middle parts of both ends of the rotating plate 30 are respectively provided with rotating shafts 301, and the rotating plate 30 is installed by inserting the rotating shafts 301 into the shaft sleeves 33. The rotating plate 30 is provided with a limited sliding groove 303 on the rotating shaft 301 facing the first moving ring 2, as shown in FIG. Figure 5 As shown, the limiting slide groove 303 is composed of four horizontal grooves 3031 and four vertical grooves 3032 connected to each other. The four horizontal grooves 3031 are respectively arranged at 90 degrees of the rotating shaft 33. The four vertical grooves 3032 are staggered and connected to the ends of the four horizontal grooves 3031. The rotating plate 30 is provided with blades 32. When water flows through the blades 32, the rotating plate 30 is rotated.

[0030] The first movable ring 2 and the second movable ring 5 are respectively provided with springs 7 at opposite ends thereof. The first movable ring 2 is slidably connected to the pipeline 1. Figure 6 The first moving ring 2 is provided with an impact surface 22 at one end facing the water inlet of the pipe 1, and the first moving ring 2 is provided with an extension portion 21 at the other end. The inner diameter of one end of the first moving ring 2 gradually decreases along the other end. The extension portion 21 is located inside the plurality of rotating plates 30. The first moving ring 2 is provided with a plurality of circular holes 23 on the end surface facing the plurality of rotating plates 30, and a protrusion 24 is respectively provided in the plurality of circular holes 23. The other rotating shafts 301 of the plurality of rotating plates 30 are respectively inserted into the plurality of circular holes 23, and the plurality of protrusions 24 are respectively engaged in the plurality of limiting slide grooves 303.

[0031] When a large flow impacts the impact surface 22 of the first moving ring 2, the protrusion 24 is located at one end of the horizontal groove 3031, and the rotation of the rotating plate 30 is limited by the horizontal groove 3031. At this time, the plurality of rotating plates 30 are vertical, and the liquid flows along the inside and outside of the inner ring 32 to impact the turbine group 4. The liquid flow gradually decreases, and the liquid impact force gradually decreases. The first moving ring 2 moves backward, that is, the protrusion 24 moves to the other end of the horizontal groove 3031. When the protrusion 24 moves to the other end of the horizontal groove 3031, the liquid pushes the rotating plate 30 to rotate, and the protrusion 24 moves along the vertical groove 3032 to the end of the other horizontal groove 3031, thereby limiting the rotation of the rotating plate 30 by ninety degrees. Figure 7 As shown, at this time, the plurality of rotating plates 30 form a polygonal pipe, and the polygonal pipe is used for a small flow of liquid to pass through to increase the pressure of the liquid;

[0032] like Figure 8-9 The turbine group 4 includes: a turbine 1 41, a turbine 2 42, and a spring 43. The size of the turbine 1 41 is smaller than that of the turbine 2 42. A plurality of magnets are arranged on the turbine 1 41. A sleeve 1 411 is nested on the turbine 1 41. The two ends of the sleeve 411 respectively wrap the inner rings 32 in the two guide members 3. A gear ring 412 is arranged on one end of the sleeve 411 facing the water outlet of the pipeline 1. A sleeve 2 421 is arranged on the axis of the turbine 2 42. The sleeve 2 421 is nested on the sleeve 1 411. A plurality of teeth 422 are arranged on the sleeve 2 421. A plurality of springs 43 are arranged between the sleeve 1 411 and the sleeve 2 421.

[0033] When the liquid impacts the turbine 1 41 and the turbine 2 42, the turbine 2 42 moves horizontally, and the multiple teeth 422 mesh with the gear ring 412, and the turbine 1 41 and the turbine 2 42 rotate synchronously. When there is no flow, the multiple teeth 422 are separated from the gear ring 412 by the spring piece 43, and the turbine 1 41 rotates alone under the impact of the liquid;

[0034] The second moving ring 5 is slidably connected to the pipeline 1. Figure 10-11 As shown, a plurality of connecting columns 51 are arranged inside the second moving ring 5, and the number of the plurality of connecting columns 51 is the same as the number of the plurality of rotating plates 30. A hole is arranged on the connecting column 51, and a second protrusion 53 is arranged in the hole. The rotating shaft 301 in the plurality of rotating plates 30 in the water outlet pipe is inserted into the hole, and the second protrusion 53 is engaged in the limiting slide groove 303. An impact plate 52 is arranged at one end of the second moving ring 5. The liquid flows through the impact plate 52 to move the second moving ring 5. When the second moving ring 5 is close to the turbine group 4, the plurality of rotating plates 30 in the water outlet pipe rotate ninety degrees to form a polygonal pipe.

[0035] The frequency sensor 6 is provided with a magnetic steel and a coil inside, and the frequency sensor 6 can periodically cut the magnetic flux lines of the magnet, thereby generating an induction signal in the coil; the frequency sensor 6 sends the induction signal to the signal processor, and the signal processor amplifies and filters the induction signal to accurately calculate the change frequency of the induction signal, and the speed of the turbine group 4 can be accurately calculated by the change frequency of the induction signal;

[0036] Two micro-touch switches (not shown in the figure) are arranged in the pipeline 1. When the flow rate is large, the first movable ring 2 squeezes one of the micro-touch switches. When the flow rate is small, the first movable ring 2 squeezes the other micro-touch switch, thereby switching to the small flow mode, thereby correcting the calculation of the liquid flow.

[0037] Working principle of the present invention:

[0038] When the flow rate is large, the plurality of rotating plates 30 are vertical, and the liquid flows along the inside and outside of the inner ring 32, impacting the turbine group 4, and the turbine 1 41 and the turbine 2 42 rotate synchronously. The rotation speed of the turbine 1 41 and the turbine 2 42 is measured by the frequency sensor 6, thereby calculating the flow rate of the liquid;

[0039] When the flow rate is small, the small flow direction mode is switched, and the multiple rotating plates 30 located in the water inlet pipe and the water outlet pipe form two polygonal pipes to increase the pressure of the liquid. The liquid enters the sleeve 411 along the polygonal pipe in the water inlet pipe and impacts the turbine 41. The liquid then flows in and out along the polygonal pipe in the water outlet pipe. The rotation speed of the turbine 41 is measured by the frequency sensor 6, thereby calculating the flow rate of the liquid.

Claims

1. A flow sensor, comprising: A pipeline (1), a first moving ring (2), a flow guide (3), a turbine group (4), a second moving ring (5), and a frequency sensor (6); the first moving ring (2), the flow guide (3), the turbine group (4), and the second moving ring (5) are located in the pipeline (1); the first moving ring (2) and the second moving ring (5) are respectively located in the water inlet pipe and the water outlet pipe of the pipeline (1); the turbine group (4) is located in the middle of the pipeline (1); there are two flow guides (3); the two flow guides (3) are arranged in opposite directions; the two flow guides (3) are respectively located between the turbine group (4) and the first moving ring (2) and the second moving ring (5); and the frequency sensor (6) is located above the turbine group (4); The flow guide (3) comprises: a diverter plate (31), an inner ring (32), a shaft sleeve (33), a guide column (34), and a rotating plate (30). The number of the diverter plates (31) is multiple, and the multiple diverter plates (31) are radially arranged with the guide column (33) as the axis. The inner ring (32) is fixed to the multiple diverter plates (31), and the number of the rotating plates (30) is the same as that of the diverter plates (31). The two ends of the rotating plate (30) are respectively provided with a rotating shaft (301), and the rotating plate (30) is rotatably connected to the diverter plate (31), and the connection point is located in the inner ring (32). A limiting sliding groove (303) is provided on the rotating shaft (301), and the limiting sliding groove (303) limits the rotating plate (30) from rotating by ninety degrees. The rotating plate (30) is provided with a blade (32); Springs (7) are respectively provided at opposite ends of the first moving ring (2) and the second moving ring (5); the first moving ring and the second moving ring (52) are slidably connected to the pipeline (1); an impact surface (22) is provided at one end of the first moving ring (2) facing the water inlet of the pipeline (1); an extension portion (21) is provided at the other end of the first moving ring (2); the extension portion (21) is located inside the plurality of rotating plates (30); and a plurality of rotating plates (30) are provided on the end surface of the first moving ring (2) facing the plurality of rotating plates (30). A plurality of circular holes (23) are provided, and a protrusion one (24) is respectively provided in the plurality of circular holes (23), the rotating shafts (301) of the plurality of rotating plates (30) are respectively inserted into the plurality of circular holes (23), and the protrusion one (24) is engaged in the limiting sliding groove (303); a hole is provided on the second moving ring (5), and a protrusion two (53) is provided in the hole, and the rotating shafts (301) of the plurality of rotating plates (30) in the water outlet pipe are inserted into the hole, and the protrusion two (53) is engaged in the limiting sliding groove (303); The turbine group (4) comprises: a turbine 1 (41), a turbine 2 (42), and a spring piece (43); the turbine 1 (41) is provided with a plurality of magnets; the turbine 1 (41) is nested with a sleeve 1 (411); the turbine 2 (42) is nested in the sleeve 1 (411) through the sleeve 2 (421); after the sleeve 2 (421) moves to one side, the sleeve 1 (411) and the sleeve 2 (421) are nested with each other; and a plurality of spring pieces (43) are provided between the sleeve 1 (411) and the sleeve 2 (421).

2. A flow sensor according to claim 1, characterized in that: The limiting sliding groove (303) is composed of four horizontal grooves (3031) and four vertical grooves (3032) connected to each other. The four horizontal grooves (3031) are arranged at 90 degrees, and the four vertical grooves (3032) are staggered and connected to the ends of the four horizontal grooves (3031).

3. A flow sensor according to claim 1, characterized in that: The frequency sensor (6) is provided with a magnetic steel and a coil inside. The frequency sensor (6) can periodically cut the magnetic flux lines of the magnet, thereby generating an induction signal in the coil. The frequency sensor (6) sends the induction signal to the signal processor, and the signal processor performs amplification, filtering and other processing on the induction signal to accurately calculate the changing frequency of the induction signal. The rotating speed of the turbine group (4) can be accurately calculated based on the changing frequency of the induction signal.

4. A flow sensor according to claim 1, characterized in that: Two micro-touch switches are arranged in the pipeline (1), and the two micro-touch switches are used to switch between a large flow mode and a small flow mode.

5. A flow sensor according to claim 1, characterized in that: A gear ring (412) is provided at one end of the sleeve (411), and a plurality of teeth (422) are provided on the second sleeve (421).

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