Impeller type flow meter

Abstract

The utility model relates to an impeller type flow meter which comprises a flow meter shell and a shell upper cover arranged on the surface of the flow meter shell, a water inlet and a water outlet are formed in the surface of the flow meter shell, a first impeller is rotatably connected to the interior of the flow meter shell, a plurality of blades are arranged on the surface of the first impeller, and a water outlet is formed in the shell upper cover. The cross section of each blade is in an arc shape, and a detection element used for detecting the rotating speed of the first impeller is further arranged in the flow meter shell. When water flow impacts the first impeller to rotate, compared with a straight-face blade, an arc-shaped blade design or a blade edge chamfering design, liquid flows in a scanning mode when passing through the blades, the resistance to the water flow is effectively reduced, in addition, due to the streamline design, the liquid flows more evenly, and the water flow efficiency is improved. The friction force on the surfaces of the blades is reduced, so that the whole flow meter has longer service life.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, and particularly relates to an impeller type flow meter. Background Art

[0002] An impeller type flow meter is a device that measures flow based on the principle of fluid moment of momentum; the working principle of an impeller type flow meter is to place an impeller in the fluid to be measured, and the impeller rotates under the impact of the fluid flow. The magnitude of the flow is reflected by the speed of the impeller rotation. A Hall element is placed near the impeller, which can sense the magnetic field changes generated when the impeller rotates and convert these changes into pulse signals for output. This pulse signal is then fed back to the controller, and the controller determines the magnitude of the water flow based on the received pulse signal.

[0003] The application publication number is CN116164802A, which discloses an optocoupler flow meter. Combining its specification and drawings, in its solution, the impeller is installed between the card seats at the top of the lower housing. The two ends of the rotating shaft of the impeller are clamped in the strip-shaped grooves of the card seats. At this time, the impeller will be located between the rectangular groove and the semi-circular groove, and the impeller can rotate when affected by the water flow. However, the cross-section of the blades on the impeller is a complete rectangle, and a large resistance will be generated whenever the water flow passes through, which will have a certain impact on the flow velocity of the water flow inside the flow meter and bring inconvenience during use. Summary of the Invention

[0004] The utility model mainly aims at the problems existing during the use of the flow meter and invents an impeller type flow meter. When the water flow impacts the first impeller, compared with the blades with a straight surface as a whole, the design of arc-shaped blades or the design of chamfering the blade edges makes the liquid flow in a scanning pattern when passing through the blades, reducing the resistance to the water flow, making the liquid flow more uniform, and reducing the friction force on the blade surface, thereby enabling the entire flow meter to have a longer service life; the detachable design between the flow meter housing and the housing cover enables the detachable connection between the magnetic block and the first impeller, and the component placement plate also realizes the detachable connection with the first impeller by using elastic buckles.

[0005] The invention purpose of the utility model is realized through the following technical scheme: an impeller type flow meter, including a flow meter housing, a housing cover arranged on the surface of the flow meter housing, the surface of the flow meter housing is provided with a water inlet and a water outlet, the inside of the flow meter housing is rotatably connected with a first impeller, the surface of the first impeller is provided with a plurality of blades, the cross-section of the blades is arc-shaped, and a detection element for detecting the rotation speed of the first impeller is also arranged inside the flow meter housing.

[0006] An impeller flowmeter includes a flowmeter housing and a housing upper cover disposed on the surface of the flowmeter housing. It is characterized in that the surface of the flowmeter housing is provided with a water inlet and a water outlet. A first impeller is rotatably connected inside the flowmeter housing. A plurality of blades are provided on the surface of the first impeller. Chamfers are provided at the joints of the blades and the first impeller, and chamfers are also provided on one side of the ends of the blades. A detection element for detecting the rotational speed of the first impeller is further provided inside the flowmeter housing.

[0007] Preferably, a first annular boss and a second annular boss are provided on one end surface of the housing upper cover. An installation card slot for clamping on the top of the flowmeter housing is provided between the first annular boss and the second annular boss.

[0008] Preferably, a clamping boss is provided on the surface of the flowmeter housing. The installation card slot is fitted on the surface of the clamping boss. A plurality of limit bosses are provided on the surface of the clamping boss. A plurality of adapted limit card slots are provided on the side wall of the first annular boss. Each limit boss is used for clamping inside the limit card slot.

[0009] Preferably, a water inlet joint and a water outlet joint are provided at one end of the surface of the flowmeter housing. The ends of the water inlet joint and the water outlet joint respectively correspond to the water inlet and the water outlet. First anti-slip bosses for increasing friction are provided at the ends of the water inlet joint and the water outlet joint.

[0010] Preferably, a first installation groove is provided inside the flowmeter housing. The first impeller is disposed inside the first installation groove. A second installation groove is provided inside the first installation groove. A third installation groove is provided inside the housing upper cover. An impeller rotating shaft is provided inside the second installation groove and the third installation groove. A rotating shaft through hole is provided on the surface of the first impeller. The rotating shaft through hole is disposed on the surface of the impeller rotating shaft.

[0011] Preferably, the cross-sections of the first installation groove, the second installation groove and the third installation groove are all circular. This setting is because the circular cross-sectional shape can make the resistance of the water flow inside the flowmeter housing smaller.

[0012] Preferably, the first impeller extends downward to be provided with a columnar boss. A plurality of second anti-slip bosses are provided on the side wall of the columnar boss. Magnets are provided on the surface of the second anti-slip bosses. The magnets rotate as the first impeller rotates. This setting is to realize the detection of the rotation condition of the magnets by the detection element.

[0013] Preferably, a fourth mounting groove is further provided on the surface of the flowmeter housing. An element placement plate is provided inside the fourth mounting groove. The detection element is arranged on the surface of the element placement plate. Elastic buckles are further provided on both sides of the flowmeter housing. The end of the element placement plate can be snapped into or disengaged from the limit of the elastic buckle, which is for facilitating the disassembly and assembly of the entire flowmeter.

[0014] Preferably, the detection element is a Hall element that senses the magnetic field change generated when the induction magnet rotates. A signal connector for transmitting signals is provided at one end of the element placement plate.

[0015] Compared with the prior art, the present utility model has the following beneficial effects: 1. When the water flow impacts the first impeller to rotate, compared with the blades with a completely straight surface, the design of the arc-shaped blades or the chamfer design at the blade edges enables the liquid to flow in a scanning pattern when passing through the blades, effectively reducing the resistance to the water flow. Moreover, when the liquid passes through the blades, if the blades have a completely straight surface, it will cause wear on the blade surface. However, when passing through the arc-shaped blades or the chamfered blades, due to their streamlined design, the liquid flow is more uniform, reducing the friction force on the blade surface, thereby enabling the entire flowmeter to have a longer service life; 2. The detachable design between the flowmeter housing and the housing cover enables the detachable connection between the magnetic block and the first impeller. The element placement plate also realizes the detachable connection with the first impeller by using elastic buckles, which is convenient for later disassembly, assembly, and maintenance, reducing the part replacement cost during disassembly and assembly, and only replacing the damaged parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the first embodiment of the present utility model;

[0017] Figure 2 is a cross-sectional view of the first embodiment of the present utility model;

[0018] Figure 3 is an exploded view of the first embodiment of the present utility model;

[0019] Figure 4 is an exploded view of the first embodiment of the present utility model;

[0020] Figure 5 is an exploded view of the first embodiment of the present utility model;

[0021] Figure 6 is a perspective view of the first embodiment of the present utility model;

[0022] Figure 7 is an exploded view of the second embodiment of the present utility model.

[0023] Markings in the figure: 1, flowmeter housing; 11, water inlet joint; 12, water outlet joint; 13, first anti-slip boss; 14, clamping boss; 15, limiting boss; 16, first installation groove; 17, second installation groove; 18, fourth installation groove; 19, elastic buckle; 111, water inlet; 121, water outlet; 2, housing upper cover; 21, first annular boss; 211, limiting card slot; 22, second annular boss; 23, installation card slot; 24, third installation groove; 3, first impeller; 31, blade; 32, shaft through hole; 33, columnar boss; 331, second anti-slip boss; 4, detection element; 5, impeller shaft; 6, magnetic block; 7, element placement board; 71, signal joint. Detailed implementation mode

[0024] The following further describes the present utility model in conjunction with the embodiments shown in the accompanying drawings:

[0025] As Figures 1 to 6 shown, the first embodiment of the present utility model: An impeller type flowmeter includes a flowmeter housing 1 and a housing upper cover 2 provided on the surface of the flowmeter housing 1. One end surface of the housing upper cover 2 is provided with a first annular boss 21 and a second annular boss 22. An installation card slot 23 for clamping on the top of the flowmeter housing 1 is provided between the first annular boss 21 and the second annular boss 22. A clamping boss 14 is provided on the surface of the flowmeter housing 1. The installation card slot 23 is hermetically connected to the surface of the clamping boss 14. A plurality of limiting bosses 15 are provided on the surface of the clamping boss 14. A plurality of matching limiting card slots 211 are provided on the side wall of the first annular boss 21. Whenever the installation card slot 23 is rotated and placed on the surface of the clamping boss 14, the housing upper cover 2 is rotated until the limiting boss 15 is clamped inside the limiting card slot 211. In this way, the detachable design between the flowmeter housing 1 and the housing upper cover 2 is realized, which is convenient for subsequent disassembly and assembly and brings convenience during use.

[0026] In the first embodiment, a water inlet joint 11 and a water outlet joint 12 are provided at one end of the surface of the flowmeter housing 1. The ends of the water inlet joint 11 and the water outlet joint 12 respectively correspond to the water inlet 111 and the water outlet 121. First anti-slip bosses 13 for increasing the friction force are provided at the ends of the water inlet joint 11 and the water outlet joint 12. After such a setting, the user can directly insert the external water pipe on the surface of the first anti-slip boss 13. Since the first anti-slip boss 13 increases the friction force inside the water pipe, the water pipe is less likely to fall off, which brings convenience during installation and use. After the water pipe is initially inserted and fixed, the user can lock the clamp according to his own needs.

[0027] In the first embodiment, a first impeller 3 is rotatably connected inside the flowmeter housing 1. A plurality of blades 31 are provided on the surface of the first impeller 3. The cross-section of the blade 31 is arc-shaped. Specifically, a first installation groove 16 is provided inside the flowmeter housing 1. The first impeller 3 is arranged inside the first installation groove 16. A second installation groove 17 is provided inside the first installation groove 16. A third installation groove 24 is provided inside the housing upper cover 2. An impeller rotating shaft 5 is provided inside the second installation groove 17 and the third installation groove 24. A rotating shaft through hole 32 is provided on the surface of the first impeller 3. The rotating shaft through hole 32 is arranged on the surface of the impeller rotating shaft 5. It should be noted that the cross-sections of the first installation groove 16, the second installation groove 17, and the third installation groove 24 are all circular. The circular cross-section shape can make the resistance of the water flow inside the flowmeter housing 1 smaller. Among them, the cross-section of the blade 31 is arc-shaped. Whenever the water flow flows from the water inlet 111 into the inside of the flowmeter housing 1, the water flow will continuously impact the first impeller 3 to make it rotate, and then flow out normally from the water outlet 121 after passing through the first impeller 3. Compared with the completely straight blades 31, the design of the arc-shaped blades 31 makes the liquid flow in a scanning pattern when passing through the blades 31, reducing the resistance to the water flow. Moreover, when the liquid passes through the blades 31, if the blades 31 are straight, it will cause wear on the surface of the blades 31. However, when passing through the arc-shaped blades 31, due to their streamlined design, the flow of the liquid is more uniform, reducing the frictional force on the surface of the blades 31, thereby making the entire flowmeter have a longer service life.

[0028] In the first embodiment, the first impeller 3 extends downwardly to be provided with a columnar boss 33, and a plurality of second anti-slip bosses 331 are provided on the side wall of the columnar boss 33. A magnetic block 6 is inserted into the surface of the second anti-slip boss 331 by interference fit. The surface of the flowmeter housing 1 is further provided with a fourth installation groove 18, and an element placement plate 7 is arranged inside the fourth installation groove 18. The detection element 4 is arranged on the surface of the element placement plate 7. Elastic buckles 19 are further arranged on both sides of the flowmeter housing 1. The end of the element placement plate 7 can be snapped into or disengaged from the limit of the elastic buckle 19. After such a setting, a detachable connection is achieved between the magnetic block 6 and the first impeller 3, and the element placement plate 7 also achieves a detachable connection with the first impeller 3 by using the elastic buckle 19. As a whole, it is convenient for later disassembly, assembly and maintenance, reduces the cost of part replacement during disassembly and assembly, and only needs to replace the damaged parts. The magnetic block 6 rotates with the rotation of the first impeller 3. A detection element 4 for detecting the rotation speed of the first impeller 3 is further arranged inside the flowmeter housing 1. The detection element 4 is a Hall element that senses the magnetic field change generated when the magnetic block 6 rotates. One end of the element placement plate 7 is provided with a signal connector 71 for transmitting signals. Among them, the Hall element is a sensor based on the Hall effect, which can sense the change of the magnetic field and convert it into an electrical signal. When water flows through the first impeller 3, the magnetic block 6 and the first impeller 3 will rotate with the water flow. The rotation speed is proportional to the flow rate. Since the Hall element is placed below the magnetic block 6, it can sense the magnetic field change generated when the magnetic block 6 rotates and convert these changes into pulse signals for output. This pulse signal is then fed back to an external controller through the signal connector 71. The controller judges the magnitude of the water flow rate according to the received pulse signal.

[0029] As Figure 7 shown, in the second embodiment of the present invention, the only difference from the first embodiment is that the cross-section of several blades 31 on the surface of the first impeller 3 is rectangular, but the side wall edges of the blades 31 are chamfered to make it have a certain streamline shape, so that the flow of the liquid is more uniform and the resistance to the water flow can also be reduced.

[0030] Working principle and usage method of the present invention:

[0031] First, directly insert the external water pipes onto the surfaces of the first anti-slip bosses 13 at the ends of the water inlet joint 11 and the water outlet joint 12 respectively. Since the first anti-slip bosses 13 increase the internal friction of the water pipes, the water pipes are less likely to fall off. After the water pipes are initially inserted and fixed, lock the clamp. Then, let water flow through. When the water flow enters the interior of the flowmeter housing 1 from the water inlet 111, the water flow will continuously impact the first impeller 3 and cause it to rotate. When the liquid passes through the blades 31, the design of the arc-shaped blades 31 or the design of chamfering the edges of the blades 31 causes the liquid to exhibit a scanning-type flow when passing through the blades 31, reducing the resistance to the water flow. And due to its streamlined design, the flow of the liquid is more uniform. Until it completely passes through the first impeller 3 and is normally discharged from the water outlet 121. When the water flow causes the first impeller 3 to rotate, the magnet block 6 and the first impeller 3 rotate with the water flow. The rotation speed is proportional to the flow rate. Since the Hall element is placed below the magnet block 6, it can sense the magnetic field changes generated when the magnet block 6 rotates, and convert these changes into pulse signals for output. This pulse signal is then fed back to an external controller through the signal connector 71. The controller determines the magnitude of the water flow rate based on the received pulse signal.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An impeller flowmeter, comprising a flowmeter housing (1), and a housing upper cover (2) arranged on the surface of the flowmeter housing (1), characterized in that: The surface of the flow meter housing (1) is provided with a water inlet (111) and a water outlet (121); the interior of the flow meter housing (1) is rotatably connected to a first impeller (3); the surface of the first impeller (3) is provided with a plurality of blades (31); the cross section of the blades (31) is arc-shaped; and the interior of the flow meter housing (1) is also provided with a detection element (4) for detecting the rotation speed of the first impeller (3).

2. An impeller flow meter, comprising a flow meter housing (1), and a housing upper cover (2) arranged on the surface of the flow meter housing (1), characterized in that: The surface of the flow meter housing (1) is provided with a water inlet (111) and a water outlet (121); a first impeller (3) is rotatably connected to the inside of the flow meter housing (1); a plurality of blades (31) are provided on the surface of the first impeller (3); a chamfer is provided at the junction of the blades (31) and the first impeller (3); a chamfer is also provided on one side of the end of the blade (31); and a detection element (4) for detecting the rotation speed of the first impeller (3) is also provided inside the flow meter housing (1).

3. The impeller flow meter according to claim 1 or claim 2, characterized in that: A first annular boss (21) and a second annular boss (22) are provided on one end surface of the housing upper cover (2), and a mounting slot (23) for clamping on the top of the flow meter housing (1) is provided between the first annular boss (21) and the second annular boss (22).

4. The impeller flow meter according to claim 3, characterized in that: The surface of the flow meter housing (1) is provided with a clamping boss (14), the mounting slot (23) is matched with the surface of the clamping boss (14), the surface of the clamping boss (14) is provided with a plurality of limiting bosses (15), the side wall of the first annular boss (21) is provided with a plurality of matching limiting slots (211), and each limiting boss (15) is used to be clamped in the interior of the limiting slot (211).

5. The impeller flow meter according to claim 4, characterized in that: A water inlet joint (11) and a water outlet joint (12) are provided at one end of the surface of the flow meter housing (1), the ends of the water inlet joint (11) and the water outlet joint (12) both correspond to the water inlet (111) and the water outlet (121), and the ends of the water inlet joint (11) and the water outlet joint (12) are both provided with a first anti-slip boss (13) for increasing friction.

6. The impeller flow meter according to claim 5, characterized in that: A first mounting groove (16) is provided inside the flow meter housing (1), the first impeller (3) is arranged inside the first mounting groove (16), a second mounting groove (17) is provided inside the first mounting groove (16), a third mounting groove (24) is provided inside the housing upper cover (2), an impeller rotating shaft (5) is provided inside the second mounting groove (17) and the third mounting groove (24), a rotating shaft through hole (32) is provided on the surface of the first impeller (3), and the rotating shaft through hole (32) is provided on the surface of the impeller rotating shaft (5).

7. The impeller flow meter according to claim 6, characterized in that: The cross-sections of the first mounting groove (16), the second mounting groove (17) and the third mounting groove (24) are all circular.

8. The impeller flow meter according to claim 7, characterized in that: The first impeller (3) is provided with a columnar boss (33) extending downward, a side wall of the columnar boss (33) is provided with a plurality of second anti-slip bosses (331), a surface of the second anti-slip bosses (331) is provided with a magnetic block (6), and the magnetic block (6) rotates with the rotation of the first impeller (3).

9. The impeller flow meter according to claim 8, characterized in that: The surface of the flow meter housing (1) is further provided with a fourth mounting groove (18), an element placement plate (7) is provided inside the fourth mounting groove (18), the detection element (4) is arranged on the surface of the element placement plate (7), and elastic clips (19) are further provided on both sides of the flow meter housing (1), and the ends of the element placement plate (7) can be engaged with or disengaged from the limit position of the elastic clips (19).

10. The impeller flow meter according to claim 9, characterized in that: The detection element (4) is a Hall element that senses changes in the magnetic field generated when the magnetic block (6) rotates, and a signal connector (71) for transmitting signals is provided at one end of the element placement plate (7).

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