Flow velocity detection device of flowmeter

Abstract

The invention relates to the technical field of flowmeter equipment, and discloses a flow velocity detection device of a flowmeter, which comprises a main body, the outer surface of the main body is fixedly connected with a magnetoelectric switch, the interior of the main body is fixedly connected with a front support frame, and the interior of the main body is fixedly connected with a rear support frame. When the obtuse angle plate is reset subsequently, the rotating ring pushes the obtuse angle plate to move backwards under the action of the elastic force of the spring ring, and when the side wall of the turbine is extruded by the corner of the obtuse angle plate and the flexible layer, certain friction force can be formed on the side wall of the turbine; the turbine can be smoothly transited to a low rotating speed through extrusion and friction force of the obtuse angle plate on the side wall of the turbine, the rotating speed overshoot phenomenon caused by inertia is reduced, the measuring error caused by the driving inertia of high-speed fluid of the turbine can be reduced, and the measuring precision in the flow changing process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flow meter equipment, in particular to a flow velocity detection device of a flow meter. Background Art

[0002] A flow meter is a precision measuring instrument that uses the principles of fluid physics to measure flow. It can determine the flow rate based on the physical properties of the measuring medium (such as speed, pressure, temperature, etc.);

[0003] Generally, turbine dosimeters detect water flow velocity by using the water flow velocity to impact the turbine and then detect by cutting the changes in the induced magnetic lines of force when the turbine rotates when impacted. Since the water flow velocity is sometimes fast and sometimes slow during water flow detection, when the turbine changes rapidly from fast to slow due to the inertia of the rapid rotation, it is difficult for the turbine to quickly adapt to the slower flow velocity changes, which can easily lead to overshoot of the turbine due to the inertia of the turbine, and measurement errors due to the inertia of the turbine during detection, affecting the measurement accuracy during flow changes. Summary of the invention

[0004] The object of the present invention is to provide a flow velocity detection device for a flow meter to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a flow velocity detection device of a flow meter, comprising a main body, a magnetoelectric switch is fixedly connected to the outer surface of the main body, a front support frame is fixedly connected to the interior of the main body, a rear support frame is fixedly connected to the interior of the main body, and further comprising;

[0007] The rotating mechanism includes a connecting shaft rotatably connected to a side of the front support frame close to the rear support frame, a side of the connecting shaft away from the front support frame rotatably connected to a side wall of the rear support frame, an outer surface of the connecting shaft is fixedly connected to a turbine, and an annular groove is provided on the outer surface of the connecting shaft;

[0008] The limiting mechanism includes a rotating ring slidably connected to the inside of the annular groove, a spring ring is fixedly connected to the side of the rotating ring close to the front support frame, the side of the spring ring away from the rotating ring is in contact with the inner wall of the annular groove close to the front support frame, and a plurality of obtuse-angle plates are rotatably connected to the outer surface of the rotating ring.

[0009] Furthermore, an inclined groove is provided on one side of the obtuse angle plate close to the rear support frame, a sliding groove is provided inside the obtuse angle plate, the sliding groove is connected to the inclined groove, and the sliding groove extends to the outer wall of the obtuse angle plate on the side away from the rear support frame.

[0010] Furthermore, an auxiliary mechanism is provided on the side wall of the obtuse-angled plate, which includes a flexible tube fixedly connected to the side of the obtuse-angled plate close to the rear support frame, a plurality of flexible tubes fixedly connected to a hollow ring on the side away from the obtuse-angled plate, a flexible layer is provided on the side of the flexible tube away from the hollow ring, and the flexible layer is fixedly connected to the side wall of the obtuse-angled plate on the side close to the rear support frame.

[0011] Furthermore, a disturbance mechanism is arranged inside the main body, and the disturbance mechanism includes a plurality of limit rods fixedly connected to the outer surface of the rear support frame, and sliding grooves are provided on the left and right sides of the limit rods. The side walls of the limit rods are rotatably connected to an arc-shaped elastic plate 1, and a return spring is fixedly connected to the top of the arc-shaped elastic plate 1.

[0012] Furthermore, one end of the return spring away from the arc elastic plate one is fixedly connected to the arc elastic plate two, the side of the arc elastic plate two close to the limit rod is slidably connected to the inside of the sliding groove, a plurality of circular holes are provided on the outer surface of the arc elastic plate two, the side of the arc elastic plate one away from the limit rod is rotatably connected to the middle rod, the end of the middle rod away from the arc elastic plate one is rotatably connected to the side wall of the obtuse-angled plate, and a flexible belt is fixedly connected between the two arc elastic plates two.

[0013] Furthermore, a moving mechanism is provided inside the obtuse-angled plate, and the moving mechanism includes a triangular plate slidably connected to the inside of the inclined groove, a side of the triangular plate close to the sliding groove penetrates through the inner wall of the sliding groove and extends to the inside, and two elastic strips are provided at the extended end of the triangular plate, the elastic strip away from the triangular plate is fixedly connected to the top inner wall of the sliding groove on the side away from the triangular plate, and the elastic strip close to the triangular plate is fixedly connected to the bottom inner wall of the sliding groove on the side close to the triangular plate, and a moving plate is fixedly connected between the two elastic strips, a tension spring is fixedly connected to the side of the triangular plate close to the front support frame, an end of the tension spring away from the triangular plate is fixedly connected to the side wall of the inclined groove, a side of the triangular plate away from the elastic strip penetrates through the outer wall of the inclined groove and extends to the outside of the obtuse-angled plate, and a tension spring 2 is fixedly connected to the side of the moving plate away from the elastic strip.

[0014] Furthermore, a pushing mechanism is provided inside the sliding groove, and the pushing mechanism includes two elastic straight plates fixedly connected to the side of the moving plate away from the triangular plate, and the two elastic straight plates are fixedly connected to a shaking frame on the side away from the moving plate, and the top and bottom of the shaking frame are fixedly connected to flexible plates.

[0015] Furthermore, a side of the flexible plate away from the elastic straight plate is fixedly connected to the side wall of the flexible layer, and two springs are fixedly connected to the top of the shaking frame, and one end of the two springs away from the shaking frame contacts the inner wall of the sliding groove;

[0016] Among them, one end of the second tension spring away from the movable plate is fixedly connected to the side wall of the shaking frame.

[0017] The present invention has the following beneficial effects:

[0018] 1. In the present invention, when the liquid inside the pipeline flows rapidly, the liquid will impact the obtuse-angled plate, and the obtuse-angled plate will rotate on the spring ring after being impacted. At the same time, when the liquid flows rapidly, the liquid will also impact the hollow ring, and the hollow ring will pull the obtuse-angled plate to rotate backward after being impacted. When the liquid impacts the obtuse-angled plate to cause the obtuse-angled plate to rotate backward, the rotation of the obtuse-angled plate will squeeze the arcuate elastic plate one downward through the arcuate elastic plate one, and then when the obtuse-angled plate continues to rotate, the rotating obtuse-angled plate will push the front end of the arcuate elastic plate one in the direction of the obtuse-angled plate through the intermediate rod, and at the same time, when the obtuse-angled plate rotates downward, the obtuse-angled plate will also squeeze the spring ring through the spring ring, and then the arcuate elastic plate one will form an outward expansion deformation after being pushed by the intermediate rod, and then Later, when the liquid flow rate slows down, the arc-shaped elastic plate will pull the middle rod to reset, and the middle rod will push the obtuse plate to reset when resetting. When resetting, the obtuse plate will squeeze the side wall of the turbine through the corner of the obtuse plate close to the turbine side and the flexible layer. Then, when the obtuse plate is reset, the rotating ring will also be pushed by the elastic force of the spring ring to move the obtuse plate backward. At this time, when the corner of the obtuse plate and the flexible layer squeeze the side wall of the turbine, a certain friction force can be formed on the side wall of the turbine. The squeezing and friction force of the obtuse plate on the side wall of the turbine can make the turbine smoothly transition to a lower speed, reduce the speed overshoot phenomenon caused by inertia, reduce the measurement error caused by the inertia of the turbine driven by high-speed fluid, and improve the measurement accuracy during flow changes.

[0019] 2. In the present invention, when the flexible layer squeezes the arc-shaped elastic plate 1 through the middle rod and pushes the front end of the arc-shaped elastic plate 1 to move in the direction of the obtuse-angled plate, the rotation of the middle rod on the side wall of the obtuse-angled plate will squeeze the extended end of the triangular plate inward when the obtuse-angled plate rotates. At this time, after the triangular plate is squeezed, it will be guided by the inclination of the obtuse-angled plate so that the tension spring on the triangular plate will be tilted and stretched and slide in the sliding groove. When the triangular plate slides at one end inside the sliding groove, the sliding of the triangular plate will squeeze the elastic strip. After being squeezed, the elastic strip will slide between the two elastic strips in the direction of the shaking frame. When the moving plate slides, the sliding of the moving plate will push the shaking frame to slide through the elastic straight plate. At this time, the shaking When the frame slides, it will squeeze the side wall of the flexible layer. At this time, the flexible layer will bulge outward after being squeezed. Then, when the moving plate slides, the elastic straight plate will form an outward bulging deformation under the sliding of the moving plate. At this time, the bulging flexible layer will shake under the action of the hollow ring and the spring driven by the flow of water. When the flexible layer and the shaking frame are shaking, the rapid flow of water will wash away the impurities adhered to the flexible layer under the shaking of the flexible layer, reducing the adhesion of impurities to the obtuse-angled plate, which will cause the obtuse-angled plate to increase its own weight due to the adhesion of impurities and become difficult to reset, thereby reducing the resistance of the obtuse-angled plate during rotation, making it easier to reset and more accurately respond to fluids with different flow rates.

[0020] 3. In the present invention, when the flow velocity in the pipeline decreases, the pressure of the obtuse-angled plate on the water flow will decrease. At this time, the obtuse-angled plate will be reset under the reset of the arc-shaped elastic plate 1. When the obtuse-angled plate is reset, the flow velocity of the water flow will impact the surface of the flexible tube and the hollow ring and flow. When the flexible tube is affected by the flow of the water flow, it will shake under the flow of the water. When the flexible tube shakes, it will disturb the liquid behind the turbine. When the flexible tube disturbs the liquid, it will cause the disturbed liquid to form turbulence. When the flow velocity and flow direction of the liquid change, the change of the liquid will drive the arc-shaped elastic plate 2 to slide downward. When the arc-shaped elastic plate 2 slides up and down, it will drive the connecting belts on both sides to shake synchronously and move in the changing water. A reverse force is formed in the flow, which can partially offset the water flow turbulence caused by the shaking of the flexible tube, so that the fluid is transported smoothly. At the same time, when the arc-shaped elastic plate 2 slides downward, the downward movement of the arc-shaped elastic plate 2 will also squeeze the water flow flowing between the arc-shaped elastic plate 2 and the arc-shaped elastic plate 1. When the water flow is squeezed by the sliding of the arc-shaped elastic plate 2, it will be ejected outward through the circular hole, which will also generate a certain reaction force to reduce the disturbance of the water flow, thereby suppressing the pressure fluctuation of the water flow behind the turbine, thereby reducing the impact on the entire water flow state, reducing the impact of water flow pressure fluctuations and turbulence on the rotation of the turbine, and further reducing the detection error during measurement and improving the measurement accuracy.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the main body of the present invention;

[0026] Figure 4 It is a partial cross-sectional schematic diagram of the main body of the present invention;

[0027] Figure 5 It is a schematic diagram of the limiting mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the disturbance mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 5 Enlarged view of point A in the middle;

[0030] Figure 8 It is a schematic diagram of the pushing mechanism of the present invention.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] In the figure: 1. main body; 101. magnetoelectric switch; 102. front support frame; 103. rear support frame; 2. rotating mechanism; 201. connecting shaft; 202. turbine; 203. annular groove; 3. limiting mechanism; 301. rotating ring; 302. spring ring; 303. obtuse plate; 304. inclined groove; 305. sliding groove; 4. auxiliary mechanism; 401. flexible tube; 402. hollow ring; 403. flexible layer; 5. disturbance mechanism; 501. arc elastic plate 1; 502. arc elastic plate 2; 503. limiting rod; 504. middle rod; 6. moving mechanism; 601. triangular plate; 602. elastic strip; 603. moving plate; 7. pushing mechanism; 701. elastic straight plate; 702. shaking frame; 703. flexible plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 - Figure 8 As shown, the present invention is a flow velocity detection device of a flow meter, comprising a main body 1, a magnetoelectric switch 101 is fixedly connected to the outer surface of the main body 1, a front support frame 102 is fixedly connected to the inside of the main body 1, a rear support frame 103 is fixedly connected to the inside of the main body 1, and further comprising;

[0035] The rotating mechanism 2 includes a connecting shaft 201 rotatably connected to a side of the front support frame 102 close to the rear support frame 103, a side of the connecting shaft 201 away from the front support frame 102 is rotatably connected to a side wall of the rear support frame 103, a turbine 202 is fixedly connected to the outer surface of the connecting shaft 201, and an annular groove 203 is formed on the outer surface of the connecting shaft 201;

[0036] The limiting mechanism 3 includes a rotating ring 301 slidably connected to the inside of the annular groove 203, a spring ring 302 is fixedly connected to the side of the rotating ring 301 close to the front support frame 102, and the side of the spring ring 302 away from the rotating ring 301 is in contact with the inner wall of the annular groove 203 close to the front support frame 102, and the outer surface of the rotating ring 301 is rotatably connected to a plurality of obtuse plates 303. When the liquid inside the pipeline flows rapidly, the liquid will impact the obtuse plates 303, and when the obtuse plates 303 are impacted, they will rotate on the spring ring 302. At the same time, when the liquid flows rapidly, the liquid will also impact the hollow ring 402, and when the hollow ring 402 is impacted, it will also pull the obtuse plates 303 to rotate backwards. When the liquid impacts the obtuse plates 303, the obtuse plates 303 rotate backwards.

[0037] An inclined groove 304 is provided on the side of the obtuse-angled plate 303 close to the rear support frame 103, and a sliding groove 305 is provided inside the obtuse-angled plate 303. The sliding groove 305 is connected to the inclined groove 304, and the sliding groove 305 extends to the outer wall of the obtuse-angled plate 303 on the side away from the rear support frame 103. The rotation of the obtuse-angled plate 303 will squeeze the arc-shaped elastic plate 1 501 downward through the arc-shaped elastic plate 1 501, and then when the obtuse-angled plate 303 continues to rotate, the rotating obtuse-angled plate 303 will push the front end of the arc-shaped elastic plate 1 501 toward the direction of the obtuse-angled plate 303 through the intermediate rod 504.

[0038] The side wall of the obtuse angle plate 303 is provided with an auxiliary mechanism 4, and the auxiliary mechanism 4 includes a flexible tube 401 fixedly connected to the side of the obtuse angle plate 303 close to the rear support frame 103, and a plurality of flexible tubes 401 are fixedly connected to the hollow ring 402 on the side away from the obtuse angle plate 303, and a flexible layer 403 is provided on the side of the flexible tube 401 away from the hollow ring 402, and the side of the flexible layer 403 close to the rear support frame 103 is fixedly connected to the side wall of the obtuse angle plate 303. When the flow velocity in the pipeline decreases, the pressure of the obtuse angle plate 303 subjected to the water flow will be reduced. At this time, the obtuse angle plate 303 will be reset under the reset of the arc elastic plate 501. When the obtuse angle plate 303 is reset, the flow velocity of the water flow will impact the surface of the flexible tube 401 and the hollow ring 402 and flow. When the flexible tube 401 is affected by the flow of the water flow, it will shake under the flow of the water.

[0039] A disturbance mechanism 5 is arranged inside the main body 1, and the disturbance mechanism 5 includes a plurality of limit rods 503 fixedly connected to the outer surface of the rear support frame 103, and sliding grooves are provided on the left and right sides of the limit rods 503. The side wall of the limit rods 503 is rotatably connected to an arc-shaped elastic plate 501, and the top of the arc-shaped elastic plate 501 is fixedly connected to a return spring. The rotation of the obtuse-angled plate 303 will squeeze the arc-shaped elastic plate 501 downward through the arc-shaped elastic plate 501, and then when the obtuse-angled plate 303 continues to rotate, the rotating obtuse-angled plate 303 will push the front end of the arc-shaped elastic plate 501 toward the direction of the obtuse-angled plate 303 through the intermediate rod 504.

[0040] The end of the reset spring away from the arc elastic plate 1 501 is fixedly connected to the arc elastic plate 2 502, and the side of the arc elastic plate 2 502 close to the limit rod 503 is slidably connected to the inside of the sliding groove. A plurality of circular holes are provided on the outer surface of the arc elastic plate 2 502. The side of the arc elastic plate 1 501 away from the limit rod 503 is rotatably connected to the middle rod 504. The end of the middle rod 504 away from the arc elastic plate 1 501 is rotatably connected to the side wall of the obtuse angle plate 303. A flexible belt is fixedly connected between the two arc elastic plates 2 502. After that, the arc elastic plate 1 501 will form an outward expansion deformation after being pushed by the middle rod 504. After that, when the liquid flow rate slows down, the arc elastic plate 1 501 will pull the middle rod 504 to reset, and the middle rod 504 will push the obtuse angle plate 303 to reset when resetting.

[0041] The obtuse-angle plate 303 is provided with a moving mechanism 6 inside, and the moving mechanism 6 includes a triangular plate 601 slidably connected to the inside of the inclined groove 304, and the side of the triangular plate 601 close to the sliding groove 305 penetrates through the inner wall of the sliding groove 305 and extends to the inside, and the extended end of the triangular plate 601 is provided with two elastic strips 602, and the elastic strip 602 far away from the triangular plate 601 is fixedly connected to the top inner wall of the sliding groove 305 on the side away from the triangular plate 601, and the elastic strip 602 close to the triangular plate 601 is fixedly connected to the bottom inner wall of the sliding groove 305 on the side close to the triangular plate 601, and the moving plate 603 is fixedly connected between the two elastic strips 602, and the triangular plate 601 is close to the front support frame A tension spring is fixedly connected to one side of 102, and one end of the tension spring is fixedly connected to the side wall of the inclined groove 304 away from the triangle plate 601. The side of the triangle plate 601 away from the elastic strip 602 penetrates the outer wall of the inclined groove 304 and extends to the outside of the obtuse-angled plate 303. The side of the movable plate 603 away from the elastic strip 602 is fixedly connected to a tension spring 2. After the triangle plate 601 is squeezed, it will be guided by the inclination of the obtuse-angled plate 303, so that the tension spring on the triangle plate 601 is tilted and stretched and slides in the sliding groove 305. When the triangle plate 601 slides at one end inside the sliding groove 305, the sliding of the triangle plate 601 will squeeze the elastic strip 602.

[0042] A pushing mechanism 7 is arranged inside the sliding groove 305, and the pushing mechanism 7 includes two elastic straight plates 701 fixedly connected to the side of the moving plate 603 away from the triangular plate 601, and the two elastic straight plates 701 are fixedly connected to a shaking frame 702 on the side away from the moving plate 603, and the top and bottom of the shaking frame 702 are fixedly connected to the flexible plate 703. The sliding of the moving plate 603 will push the shaking frame 702 to slide through the elastic straight plates 701, and at this time, the shaking frame 702 will squeeze the side wall of the flexible layer 403 when sliding.

[0043] The side of the flexible plate 703 away from the elastic straight plate 701 is fixedly connected to the side wall of the flexible layer 403, and the top of the shaking frame 702 is fixedly connected to two springs, and one end of the two springs away from the shaking frame 702 is in contact with the inner wall of the sliding groove 305;

[0044] Among them, the end of the second tension spring away from the movable plate 603 is fixedly connected to the side wall of the shaking frame 702, and the elastic straight plate 701 will form an outward bulging deformation under the sliding of the movable plate 603. At this time, the raised flexible layer 403 will drive the hollow ring 402 and the spring to shake under the flow of water.

[0045] When in use, first connect the main body 1 to the pipe to be measured. When the liquid inside the pipe flows, it will impact the turbine 202. After being impacted, the turbine 202 will rotate, and its rotation speed is proportional to the average flow rate of the pipe. At the same time, the rotation of the turbine 202 will periodically cut the magnetic lines of force generated by the magnetoelectric switch 101. At this time, the magnetoelectric switch 101 calculates the current flow rate by sensing the changes in the magnetic lines of force and detects the flow rate.

[0046] When the liquid in the pipe flows rapidly, the liquid will impact the obtuse angle plate 303. When the obtuse angle plate 303 is impacted, it will rotate on the spring ring 302. At the same time, when the liquid flows rapidly, the liquid will also impact the hollow ring 402. When the hollow ring 402 is impacted, it will pull the obtuse angle plate 303 to rotate backward. When the liquid impacts the obtuse angle plate 303 and causes the obtuse angle plate 303 to rotate backward, the rotation of the obtuse angle plate 303 will be transmitted through the arc elastic plate 50. 1 squeezes the arc-shaped elastic plate 1 501 downward, and then when the obtuse angle plate 303 continues to rotate, the rotating obtuse angle plate 303 will push the front end of the arc-shaped elastic plate 1 501 toward the obtuse angle plate 303 through the middle rod 504. At the same time, when the obtuse angle plate 303 rotates downward, the obtuse angle plate 303 will squeeze the spring ring 302 through the spring ring 302. Then, after the arc-shaped elastic plate 1 501 is pushed by the middle rod 504, it will form an outward expansion deformation, and then When the liquid flow rate slows down, the arc-shaped elastic plate 501 will pull the middle rod 504 to reset, and the middle rod 504 will push the obtuse plate 303 to reset when resetting. When resetting, the obtuse plate 303 will squeeze the side wall of the turbine 202 through the corner of the obtuse plate 303 close to the turbine 202 and the flexible layer 403. Then, when the obtuse plate 303 is reset, the rotating ring 301 will also be pushed by the elastic force of the spring ring 302 to move backward. At this time, when the corner of the obtuse plate 303 and the flexible layer 403 squeeze the side wall of the turbine 202, a certain friction force can be formed on the side wall of the turbine 202. The squeezing and friction force of the obtuse plate 303 on the side wall of the turbine 202 can make the turbine 202 smoothly transition to a lower speed, reduce the speed overshoot phenomenon caused by inertia, reduce the measurement error caused by the inertia of the turbine 202 driven by the high-speed fluid, and improve the measurement accuracy during the flow change process.

[0047] When the flexible layer 403 squeezes the arc elastic plate 501 through the middle rod 504 and pushes the front end of the arc elastic plate 501 to move in the direction of the obtuse plate 303, the rotation of the middle rod 504 on the side wall of the obtuse plate 303 will squeeze the extended end of the triangular plate 601 inward when the obtuse plate 303 rotates. At this time, after the triangular plate 601 is squeezed, it will be guided by the inclination of the obtuse plate 303, so that the tension spring on the triangular plate 601 is tilted and stretched and slides in the sliding groove 305. When the triangular plate 601 slides at one end inside the sliding groove 305, the sliding of the triangular plate 601 will squeeze the elastic strip 602. After being squeezed, the elastic strip 602 will slide between the two elastic strips 602 in the direction of the shaking frame 702. When the moving plate 603 slides, the sliding of the moving plate 603 will push the shaking frame 7 through the elastic straight plate 701 02 slides, at this time, the shaking frame 702 will squeeze the side wall of the flexible layer 403 when sliding, and the flexible layer 403 will bulge outward after being squeezed, and then when the moving plate 603 slides, the elastic straight plate 701 will form an outward bulging deformation under the sliding of the moving plate 603, and the bulging flexible layer 403 will rock under the action of the hollow ring 402 and the spring under the flow of water. When the flexible layer 403 and the shaking frame 702 are rocking, the rapid flow of water will wash away the impurities adhered to the flexible layer 403 under the rocking of the flexible layer 403, reducing the impurities attached to the obtuse plate 303, which will cause the obtuse plate 303 to increase its own weight due to the attachment of impurities and become difficult to reset, thereby reducing the resistance of the obtuse plate 303 during the rotation process, making it easier to reset and more accurately respond to fluids with different flow rates.

[0048] When the flow rate in the pipeline decreases, the pressure of the obtuse plate 303 on the water flow will decrease. At this time, the obtuse plate 303 will be reset under the reset of the arc elastic plate 1 501. When the obtuse plate 303 is reset, the flow rate of the water flow will impact the surface of the flexible tube 401 and the hollow ring 402 and flow. When the flexible tube 401 is affected by the flow of water, it will shake under the flow of water. When the flexible tube 401 shakes, it will disturb the liquid behind the turbine. When the flexible tube 401 disturbs the liquid, it will cause the disturbed liquid to form turbulence. When the flow rate and flow direction of the liquid change, the change of the liquid will drive the arc elastic plate 2 502 to slide downward. When the arc elastic plate 2 502 slides up and down, it will drive the connecting belts on both sides to shake synchronously and A reverse force is formed in the changing water flow, which can partially offset the water flow turbulence caused by the shaking of the flexible tube 401, so that the fluid is transported smoothly. At the same time, when the arc-shaped elastic plate 2 502 slides downward, the downward movement of the arc-shaped elastic plate 2 502 will also squeeze the water flow flowing between the arc-shaped elastic plate 2 502 and the arc-shaped elastic plate 1 501. When the water flow is squeezed by the sliding of the arc-shaped elastic plate 2 502, it will be ejected outward through the circular hole, which will also generate a certain reaction force to reduce the disturbance of the water flow, thereby suppressing the pressure fluctuation of the water flow behind the turbine, thereby reducing the impact on the entire water flow state, reducing the impact of water flow pressure fluctuations and turbulence on the rotation of the turbine, and further reducing the detection error during measurement and improving the measurement accuracy.

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flow velocity detection device for a flow meter, comprising a main body (1), a magnetoelectric switch (101) fixedly connected to the outer surface of the main body (1), a front support frame (102) fixedly connected to the interior of the main body (1), and a rear support frame (103) fixedly connected to the interior of the main body (1), characterized in that: Also includes; A rotating mechanism (2), the rotating mechanism (2) comprising a connecting shaft (201) rotatably connected to a side of the front support frame (102) close to the rear support frame (103), a side of the connecting shaft (201) away from the front support frame (102) rotatably connected to a side wall of the rear support frame (103), an outer surface of the connecting shaft (201) being fixedly connected to a turbine (202), and an outer surface of the connecting shaft (201) being provided with an annular groove (203); The limiting mechanism (3) comprises a rotating ring (301) slidably connected to the inside of the annular groove (203); a spring ring (302) is fixedly connected to the side of the rotating ring (301) close to the front support frame (102); a side of the spring ring (302) away from the rotating ring (301) contacts the inner wall of the annular groove (203) close to the front support frame (102); and a plurality of obtuse-angle plates (303) are rotatably connected to the outer surface of the rotating ring (301).

2. A flow velocity detection device for a flow meter according to claim 1, characterized in that: The obtuse-angled plate (303) is provided with an inclined groove (304) on one side close to the rear support frame (103), and a sliding groove (305) is provided inside the obtuse-angled plate (303). The sliding groove (305) is connected to the inclined groove (304), and the sliding groove (305) is extended to the outer wall of the obtuse-angled plate (303) on the side away from the rear support frame (103).

3. A flow velocity detection device for a flow meter according to claim 2, characterized in that: The side wall of the obtuse-angled plate (303) is provided with an auxiliary mechanism (4), and the auxiliary mechanism (4) comprises a flexible tube (401) fixedly connected to a side of the obtuse-angled plate (303) close to the rear support frame (103), a plurality of the flexible tubes (401) are fixedly connected to a hollow ring (402) on a side away from the obtuse-angled plate (303), a flexible layer (403) is provided on a side of the flexible tube (401) away from the hollow ring (402), and a side of the flexible layer (403) close to the rear support frame (103) is fixedly connected to the side wall of the obtuse-angled plate (303).

4. A flow velocity detection device for a flow meter according to claim 3, characterized in that: A disturbance mechanism (5) is arranged inside the main body (1), and the disturbance mechanism (5) comprises a plurality of limit rods (503) fixedly connected to the outer surface of the rear support frame (103), and a sliding groove is provided on the left and right sides of the limit rods (503), and the side wall of the limit rod (503) is rotatably connected to an arc-shaped elastic plate (501), and the top of the arc-shaped elastic plate (501) is fixedly connected to a return spring.

5. A flow velocity detection device for a flow meter according to claim 4, characterized in that: The end of the return spring away from the arc-shaped elastic plate 1 (501) is fixedly connected to the arc-shaped elastic plate 2 (502); the side of the arc-shaped elastic plate 2 (502) close to the limiting rod (503) is slidably connected to the inside of the sliding groove; a plurality of circular holes are provided on the outer surface of the arc-shaped elastic plate 2 (502); the side of the arc-shaped elastic plate 1 (501) away from the limiting rod (503) is rotatably connected to the middle rod (504); the end of the middle rod (504) away from the arc-shaped elastic plate 1 (501) is rotatably connected to the side wall of the obtuse-angle plate (303); and a flexible belt is fixedly connected between the two arc-shaped elastic plates 2 (502).

6. A flow velocity detection device for a flow meter according to claim 5, characterized in that: A moving mechanism (6) is arranged inside the obtuse-angled plate (303), and the moving mechanism (6) comprises a triangular plate (601) slidably connected inside the inclined groove (304), and the side of the triangular plate (601) close to the sliding groove (305) penetrates the inner wall of the sliding groove (305) and extends to the inside, and the extended end of the triangular plate (601) is provided with two elastic strips (602), and the side of the elastic strip (602) away from the triangular plate (601) away from the triangular plate (601) is fixedly connected to the top inner wall of the sliding groove (305), and the side of the elastic strip (602) close to the triangular plate (601) close to the triangular plate (601) is fixedly connected to the top inner wall of the sliding groove (305). One side of (601) is fixedly connected to the bottom inner wall of the sliding groove (305), a movable plate (603) is fixedly connected between the two elastic strips (602), a tension spring is fixedly connected to the side of the triangular plate (601) close to the front support frame (102), and one end of the tension spring away from the triangular plate (601) is fixedly connected to the side wall of the inclined groove (304), and the side of the triangular plate (601) away from the elastic strip (602) penetrates the outer wall of the inclined groove (304) and extends to the outside of the obtuse plate (303), and a second tension spring is fixedly connected to the side of the movable plate (603) away from the elastic strip (602).

7. A flow velocity detection device for a flow meter according to claim 6, characterized in that: A pushing mechanism (7) is arranged inside the sliding groove (305), and the pushing mechanism (7) comprises two elastic straight plates (701) fixedly connected to a side of the moving plate (603) away from the triangular plate (601), a shaking frame (702) is fixedly connected to a side of the two elastic straight plates (701) away from the moving plate (603), and a flexible plate (703) is fixedly connected to the top and bottom of the shaking frame (702).

8. A flow velocity detection device for a flow meter according to claim 7, characterized in that: The side of the flexible plate (703) away from the elastic straight plate (701) is fixedly connected to the side wall of the flexible layer (403), and the top of the shaking frame (702) is fixedly connected to two springs, and the ends of the two springs away from the shaking frame (702) are in contact with the inner wall of the sliding groove (305); Wherein, one end of the second tension spring away from the movable plate (603) is fixedly connected to the side wall of the shaking frame (702).

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