Flowmeter with accurate detection function

Abstract

A flow meter accurate in detection comprises a main body, an inner cavity used for fluid to pass through is formed in the main body, an impeller assembly is rotationally arranged on the inner cavity, a plurality of blades with angles are arranged on the peripheral side of the impeller assembly, a water inlet hole communicated with the inner cavity is formed in one side of the inner cavity, and the water inlet hole right faces the included angle of the blades. The blades with angles are arranged on the peripheral side of the impeller assembly, the water inlet holes right face the included angles of the blades, the aperture of the first through holes of the water inlet holes is larger than that of the second through holes, the first through holes are conical, and the aperture of the first through holes is gradually reduced in the direction towards the second through holes. Due to the design of the water inlet holes, water flow is intensively sprayed to the impeller assembly of the inner cavity from the water inlet holes, even if the amount of water flowing into the inner cavity is small, the water flow can smoothly reach the impeller assembly and basically does not flow downwards, due to the angle design of the blades, the water flow more effectively pushes the blades, and then the impeller is effectively pushed to rotate; therefore, the detection of the water flow is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, and particularly relates to a flow meter with accurate detection. Background Art

[0002] As Figure 8 shown, for the turbine flow meters on the market, mainly when the fluid passes through the inner cavity 112 of the main body 111, it drives the impeller 113 to rotate. The rotation of the impeller 113 drives the magnetic field to change periodically, and the Hall sensor detects the change of the magnetic field to detect the water flow rate. When the amount of water flowing into the inner cavity 112 of the main body 111 is relatively small, the water flow will flow downward after entering the inner cavity 112 ( Figure 8 as shown by the arrow), and passes through the inner cavity 112 through the lower part of the inner cavity 112. At this time, the impeller 113 is hardly pushed by the water flow, resulting in inaccurate detection of the water flow rate. When the water flow is large, the water flow will flow forward after entering the inner cavity 112. At this time, the impeller 113 is normally pushed, and the detection of the water flow rate will be relatively accurate.

[0003] Therefore, it is necessary to make further improvements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a flow meter with accurate detection, which has a simple structure, accurate detection, reliable use, good user experience and strong practicability, so as to overcome the deficiencies of the prior art.

[0005] A flow meter with accurate detection designed according to this purpose includes a main body, and an inner cavity for fluid to pass through is arranged in the main body. It is characterized in that: an impeller assembly is rotatably arranged on the inner cavity, a plurality of angled blades are arranged on the outer peripheral side of the impeller assembly, a water inlet hole communicating with the inner cavity is arranged on one side of the inner cavity, and the water inlet hole is opposite to the included angle of the blades.

[0006] The water inlet hole includes a first through hole and a second through hole which are communicated with each other. The second through hole communicates with the inner cavity. The aperture of the first through hole is larger than that of the second through hole. The first through hole is conical, and its aperture gradually decreases in the direction of the second through hole; the included angle between the water inlet hole and the blades is on the same horizontal line.

[0007] The included angle of the blades is a, and a = 45° - 150°.

[0008] The impeller assembly includes a first impeller and a second impeller arranged up and down. A plurality of first blades are arranged on the outer peripheral side of the first impeller, and a plurality of second blades are arranged on the outer peripheral side of the second impeller. The first blades and the second blades correspond to each other one by one. The first blades and the second blades together form the blades, and the included angle between the first blades and the second blades is the included angle of the blades.

[0009] The first blade is inclined and arranged on the first impeller, and the second blade is inclined and arranged on the second impeller. The inclination directions of the first blade and the second blade are opposite, and the first blade and the second blade form a V shape.

[0010] The impeller assembly further includes a rotating shaft, which is rotatably arranged on the main body, and the first impeller and the second impeller are respectively sleeved on the rotating shaft.

[0011] Water inlet pipes and water outlet pipes are respectively arranged on both sides of the main body. A water inlet hole is arranged at one end of the water inlet pipe, and the water inlet pipe communicates with the first through hole. A water outlet hole is arranged at one end of the water outlet pipe, and the inner cavity communicates with the water outlet pipe through the water outlet hole.

[0012] A water flow gap for water flow to pass through is arranged between adjacent two blades.

[0013] An accommodation cavity is arranged inside the impeller assembly, and a magnetic part is arranged on the accommodation cavity. The magnetic part is sleeved on the rotating shaft.

[0014] An installation groove is arranged on the side of the main body, and a sensor is arranged in the installation groove. The positions of the sensor and the magnetic part correspond to each other.

[0015] In the utility model, by arranging a plurality of angled blades on the outer peripheral side of the impeller assembly, the water inlet hole is directly opposite to the included angle of the blades, the aperture of the first through hole of the water inlet hole is larger than that of the second through hole, the first through hole is conical, and its hole diameter gradually decreases in the direction of the second through hole. The design of the water inlet hole enables the water flow to be concentrated and sprayed from the water inlet hole onto the impeller assembly in the inner cavity. Even if the amount of water flowing into the inner cavity is relatively small, the water flow can smoothly reach the impeller assembly and basically will not flow downward. The angle design of the blades enables the water flow to more effectively push the blades, thereby effectively pushing the impeller to rotate, so that the detection of the water flow rate is more accurate. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the flowmeter in an embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the overall structure of the flowmeter in another orientation in an embodiment of the utility model.

[0018] Figure 3 It is a cross-sectional view of the flowmeter in an embodiment of the utility model.

[0019] Figure 4 It is a cross-sectional view of the flowmeter in another orientation in an embodiment of the utility model.

[0020] Figure 5 It is a cross-sectional view of the flowmeter in the third orientation in an embodiment of the utility model.

[0021] Figure 6Schematic diagram of the overall structure of the first impeller in an embodiment of the present utility model.

[0022] Figure 7 Exploded structure schematic diagram of the flowmeter in an embodiment of the present utility model.

[0023] Figure 8 Cross-sectional view of a traditional flowmeter. Specific embodiments

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] See Figures 1 - 7 , for this flowmeter with accurate detection, including a main body 1, an inner cavity 2 for fluid passage is provided in the main body 1, an impeller assembly 3 is rotatably provided on the inner cavity 2, a plurality of angled blades 4 are provided on the outer peripheral side of the impeller assembly 3, a water inlet hole 5 communicating with the inner cavity 2 is provided on one side of the inner cavity 2, the water inlet hole 5 is opposite to the included angle of the blades 4, and the water flow sprays onto the included angle of the blades 4 through the water inlet hole 5, thereby driving the impeller assembly 3 to rotate.

[0026] The water inlet hole 5 includes a first through hole 6 and a second through hole 21 that communicate with each other. The second through hole 21 communicates with the inner cavity 2. The aperture of the first through hole 6 is larger than that of the second through hole 21. The first through hole 6 is conical and its aperture gradually decreases in the direction of the second through hole 21. When the water flow passes through the first through hole 6, due to the conical shape of the first through hole 6, the water flow will pass through the first through hole 6 more concentratedly, and at the same time increase the water flow speed. The aperture of the second through hole 21 is smaller, so that the water flow passes through the second through hole 21 more concentratedly and sprays onto the impeller assembly 3 in the inner cavity 2. The flow trajectory of the water is basically a horizontal straight line (as Figure 4 shown by the arrow), and basically does not flow downward; the included angle between the water inlet hole 5 and the blade 4 is on the same horizontal line.

[0027] The included angle of the blade 4 is a, a = 45° to 150°, preferably 90° to 140°. The included angle a in this embodiment is 140°.

[0028] The impeller assembly 3 includes a first impeller 7 and a second impeller 8 arranged up and down. A plurality of first blades 9 are provided on the outer peripheral side of the first impeller 7, and a plurality of second blades 10 are provided on the outer peripheral side of the second impeller 8. The first blades 9 and the second blades 10 correspond to each other one by one. The first blades 9 and the second blades 10 together form the blade 4, and the included angle between the first blade 9 and the second blade 10 is the included angle of the blade 4.

[0029] The first blade 9 is inclinedly arranged on the first impeller 7, and the second blade 10 is inclinedly arranged on the second impeller 8. The inclination directions of the first blade 9 and the second blade 10 are opposite, and the first blade 9 and the second blade 10 form a V shape; the first blade 9 and the second blade 10 are inclinedly arranged so that the blades have a certain angle with the water flow direction. Furthermore, the impact force of the fluid causes the blades to have a rotational torque. After overcoming the frictional torque and fluid resistance, the blades rotate, and the rotational speed becomes stable after the torque balance.

[0030] The impeller assembly 3 further includes a rotating shaft 11. The rotating shaft 11 is rotatably arranged on the main body 1. The first impeller 7 and the second impeller 8 are respectively sleeved on the rotating shaft 11. The first impeller 7 and the second impeller 8 are fixed on the rotating shaft 11. There is a rotating hole provided on the main body 1, and the rotating shaft 11 is rotationally matched with the rotating hole.

[0031] The two sides of the main body 1 are respectively provided with a water inlet pipe 12 and a water outlet pipe 13. The water inlet hole 5 is arranged at one end of the water inlet pipe 12. The water inlet pipe 12 communicates with the first through hole 6. The radial direction of the first through hole 6 gradually increases towards the direction of the water inlet pipe 12. One end of the water outlet pipe 13 is provided with a water outlet hole 14, and the inner cavity 2 communicates with the water outlet pipe 13 through the water outlet hole 14; as Figure 4 shown by the arrow, the water flow sequentially enters the inner cavity 2 through the water inlet pipe 12 and the water inlet hole 5, and then flows out to the water outlet pipe 13 through the water outlet hole 14.

[0032] A water flow gap 15 for the water flow to pass through is arranged between two adjacent blades 4. When the water flow passes through the water flow gap 15, it pushes the blade 4, and thus pushes the impeller assembly 3 to rotate.

[0033] An accommodation cavity 16 is arranged inside the impeller assembly 3. A magnetic member 17 is arranged on the accommodation cavity 16. The magnetic member 17 is sleeved on the rotating shaft 11 and fixed on the rotating shaft 11. When the water flow pushes the impeller assembly 3 to rotate, the impeller assembly 3 drives the magnetic member 17 to rotate through the rotating shaft 11; the magnetic member 17 is a magnet, and the accommodation cavity 16 is arranged inside the first impeller 7.

[0034] An installation groove 18 is arranged on the side of the main body 1. A sensor is arranged inside the installation groove 18. The position of the sensor corresponds to that of the magnetic member 17. The sensor is a Hall sensor. When the magnetic member 17 rotates, it drives the magnetic field to change periodically. The Hall sensor detects the change of the magnetic field, thereby detecting the water flow rate. The above structure is prior art and will not be elaborated here in detail.

[0035] The main body 1 includes a housing 19 and an upper cover 20. The inner cavity 2 and the installation groove 18 are arranged inside the housing 19. The upper cover 20 covers the top opening of the inner cavity 2. The water inlet pipe 12 and the water outlet pipe 13 are respectively arranged on both sides of the housing 19.

[0036] The above is the preferred embodiment of the present utility model, which shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, various changes and improvements will occur to the present utility model, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flow meter with accurate detection, comprising a main body (1), wherein the main body (1) is provided with an inner cavity (2) for fluid to pass through, characterized in that: An impeller assembly (3) is rotatably arranged on the inner cavity (2), a plurality of blades (4) with angles are arranged on the outer peripheral side of the impeller assembly (3), a water inlet hole (5) communicating with the inner cavity (2) is arranged on one side of the inner cavity (2), and the water inlet hole (5) is directly opposite to the angle of the blades (4).

2. The flow meter with accurate detection according to claim 1, characterized in that: The water inlet hole (5) comprises a first through hole (6) and a second through hole (21) which are connected to each other, the second through hole (21) is connected to the inner cavity (2), the aperture of the first through hole (6) is larger than the aperture of the second through hole (21), the first through hole (6) is tapered, and its aperture gradually decreases in the direction toward the second through hole (21); the angle between the water inlet hole (5) and the blade (4) is located on the same horizontal line.

3. The flow meter with accurate detection according to claim 2, characterized in that: The included angle of the blade (4) is a, and a=45° to 150°.

4. The flow meter with accurate detection according to claim 1, characterized in that: The impeller assembly (3) comprises a first impeller (7) and a second impeller (8) which are arranged one above the other. A plurality of first blades (9) are arranged on the outer peripheral side of the first impeller (7), and a plurality of second blades (10) are arranged on the outer peripheral side of the second impeller (8). The first blades (9) correspond to the second blades (10) one by one. The first blades (9) and the second blades (10) together form a blade (4), and the angle between the first blade (9) and the second blade (10) is the angle of the blade (4).

5. The flow meter with accurate detection according to claim 4, characterized in that: The first blade (9) is arranged obliquely on the first impeller (7), and the second blade (10) is arranged obliquely on the second impeller (8); the first blade (9) and the second blade (10) are inclined in opposite directions, and the first blade (9) and the second blade (10) form a V shape.

6. The flow meter with accurate detection according to claim 4, characterized in that: The impeller assembly (3) further comprises a rotating shaft (11), the rotating shaft (11) being rotatably disposed on the main body (1), and the first impeller (7) and the second impeller (8) being respectively sleeved on the rotating shaft (11).

7. The flow meter with accurate detection according to claim 2, characterized in that: A water inlet pipe (12) and a water outlet pipe (13) are respectively arranged on both sides of the main body (1); a water inlet hole (5) is arranged at one end of the water inlet pipe (12); the water inlet pipe (12) is connected to the first through hole (6); a water outlet hole (14) is arranged at one end of the water outlet pipe (13); and the inner cavity (2) is connected to the water outlet pipe (13) through the water outlet hole (14).

8. The flow meter with accurate detection according to claim 2, characterized in that: A water flow gap (15) for water to pass through is provided between two adjacent blades (4).

9. The flow meter with accurate detection according to claim 6, characterized in that: An accommodating chamber (16) is provided in the impeller assembly (3), a magnetic component (17) is provided on the accommodating chamber (16), and the magnetic component (17) is sleeved on the rotating shaft (11).

10. The flow meter with accurate detection according to claim 9, characterized in that: A mounting groove (18) is provided on the side of the main body (1), a sensor is provided in the mounting groove (18), and the positions of the sensor and the magnetic member (17) correspond to each other.

Images