Flow meter

Abstract

A flow meter comprises a shell assembly, an impeller assembly and a rotating shaft, the impeller assembly is arranged on the rotating shaft in a sleeving mode, the rotating shaft is rotationally installed on the shell assembly, installation holes are formed in the two ends, corresponding to the rotating shaft, of the shell assembly respectively, wear-resisting ball pieces are arranged in the installation holes, and the wear-resisting ball pieces abut against the two ends of the rotating shaft. The wear-resisting ball pieces are arranged in the mounting holes of the shell assembly and located at the two ends of the rotating shaft respectively, original contact between the rotating shaft and the shell is changed into contact between the rotating shaft and the wear-resisting ball pieces, and when the rotating shaft rotates, the wear-resisting ball pieces make contact with the corresponding end faces (matching faces) of the rotating shaft in a tangent point mode. The friction force between the rotating shaft and the abrasion-resistant ball piece is small, abrasion of the rotating shaft and the abrasion-resistant ball piece is greatly reduced, the rotating shaft is prevented from moving up and down after the rotating shaft and the abrasion-resistant ball piece are abraded, the influence on rotation of the impeller is reduced, the accuracy of water flow detection is improved, and meanwhile the service life of the flow meter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to a flow meter. Background Art

[0002] The flow meters on the market mainly use the fluid passing through the inner cavity of the shell to drive the impeller to rotate. The rotation of the impeller drives the periodic change of the magnetic field. The Hall sensor detects the change of the magnetic field, thereby detecting the water flow rate. The impeller is installed on the shell through the rotating shaft. The rotating shaft is a metal part, and in order to position the rotating shaft, the two ends of the rotating shaft are designed to be sharp. The shell is a plastic part. When the rotating shaft rotates, friction will occur between its two ends and the shell, which will cause wear of the rotating shaft and the shell, especially when the shell wear is more serious. In addition, the impeller is often impacted by the fluid, which will further aggravate the wear of the rotating shaft and the shell. After wear, there will be a gap between the two ends of the rotating shaft and the shell, causing the rotating shaft to move up and down when it rotates, which will affect the rotation of the impeller, resulting in inaccurate water flow detection and affecting the service life of the flow meter.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of the utility model is to provide a flow meter with simple structure, small wear, accurate detection, long service life and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A flow meter designed for this purpose includes a housing assembly, an impeller assembly and a rotating shaft, the impeller assembly is sleeved on the rotating shaft, and the rotating shaft is rotatably mounted on the housing assembly. The flow meter is characterized in that mounting holes are respectively provided at both ends of the housing assembly corresponding to the rotating shaft, wear-resistant ball parts are provided in the mounting holes, and the wear-resistant ball parts abut against both ends of the rotating shaft.

[0006] Matching surfaces are respectively arranged at both ends of the rotating shaft. When the rotating shaft rotates, the wear-resistant ball part and the matching surface abut against each other.

[0007] The wear-resistant ball is interference fit with the hole wall of the mounting hole.

[0008] The wear-resistant ball parts are made of metal materials or wear-resistant materials.

[0009] A sealing member is arranged on the mounting hole and is located on the outer side of the wear-resistant ball member.

[0010] The shape of the rotating shaft is cylindrical, and the shape of the wear-resistant ball part is spherical.

[0011] The two ends of the shell component are respectively provided with rotation holes, the rotation shaft is installed on the rotation hole, and the two ends of the rotation shaft are respectively rotationally matched with the corresponding rotation holes.

[0012] The shell assembly includes a shell and an upper cover connected to each other. An inner cavity is arranged in the shell. The impeller assembly is rotatably arranged on the inner cavity. The upper cover covers the top opening of the inner cavity. The mounting holes are respectively arranged on the shell and the upper cover. The two ends of the rotating shaft extend into the corresponding mounting holes respectively.

[0013] The impeller assembly comprises a first impeller and a second impeller arranged up and down, a receiving cavity is arranged in the impeller assembly, a magnetic component is arranged on the receiving cavity, and the first impeller, the second impeller and the magnetic component are respectively mounted on the rotating shaft.

[0014] A water inlet pipe and a water outlet pipe are respectively arranged on both sides of the shell, and the water inlet pipe, the inner cavity and the water outlet pipe are connected in sequence.

[0015] The utility model arranges wear-resistant ball pieces in the mounting holes of the shell components, and the wear-resistant ball pieces are respectively located at the two ends of the rotating shaft, thereby changing the original contact between the rotating shaft and the shell into the contact between the rotating shaft and the wear-resistant ball pieces. When the rotating shaft rotates, the wear-resistant ball pieces make tangent contact with the corresponding end faces (matching surfaces) of the rotating shaft, so that the friction between the rotating shaft and the wear-resistant ball pieces is small, thereby greatly reducing the wear of the rotating shaft and the wear-resistant ball pieces, and preventing the rotating shaft from moving up and down after the rotating shaft and the wear-resistant ball pieces are worn, thereby reducing the influence on the rotation of the impeller, improving the accuracy of detecting the water flow rate, and at the same time increasing the service life of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a flow meter in one embodiment of the utility model.

[0017] Figure 2 It is a cross-sectional view of a flow meter in one embodiment of the utility model.

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

[0019] Figure 4 It is a schematic diagram of the overall structure of the shell in one embodiment of the utility model.

[0020] Figure 5 It is a schematic diagram of the overall structure of the upper cover in one embodiment of the utility model.

[0021] Figure 6 It is a schematic diagram of the overall structure of the first impeller in one embodiment of the utility model.

[0022] Figure 7 It is a schematic diagram of the exploded structure of a flow meter in one embodiment of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-Figure 7 The flow meter includes a housing assembly 1, an impeller assembly 2 and a rotating shaft 3. The impeller assembly 2 is mounted on the rotating shaft 3, and the rotating shaft 3 is rotatably mounted on the housing assembly 1. The housing assembly 1 is provided with mounting holes 4 at the upper and lower ends corresponding to the rotating shaft 3, respectively. Wear-resistant ball pieces 5 are arranged in the mounting holes 4, and the ball pieces 5 and the two ends of the rotating shaft 3 are abutted against each other; when the wear-resistant ball piece 5 is spherical and abuts against the two ends of the rotating shaft 3, only the tangent points of the wear-resistant ball piece 5 and the two ends of the rotating shaft 3 are abutted, thereby forming point contact to reduce friction.

[0025] The upper and lower ends of the rotating shaft 3 are respectively provided with matching surfaces 6, the wear-resistant ball piece 5 and the matching surface 6 abut against each other, the wear-resistant ball piece 5 and the matching surface 6 are in tangent contact, and the matching surface 6 is a plane;

[0026] The wear-resistant ball piece 5 is interference-fitted with the hole wall of the mounting hole 4 to prevent the wear-resistant ball piece 5 from slipping out of the mounting hole 4 . The wear-resistant ball piece 5 is press-fitted into the mounting hole 4 by a press-fitting machine.

[0027] The wear-resistant ball component 5 is made of metal material or wear-resistant material (such as ceramic material), and the wear-resistant ball component 5 is a sphere.

[0028] A sealing member 7 is provided on the mounting hole 4 . The sealing member 7 is located outside the wear-resistant ball member 5 . The sealing member 7 is a sealant. The sealing member 7 can prevent the water flowing into the inner cavity 11 from leaking out of the flow meter through the mounting hole 4 .

[0029] The shape of the rotating shaft 3 is cylindrical, and the shape of the wear-resistant ball 5 is spherical.

[0030] The upper and lower ends of the housing assembly 1 are respectively provided with rotation holes 8 , the rotation shaft 3 is inserted into the rotation holes 8 , and the upper and lower ends of the rotation shaft 3 are respectively rotationally matched with the corresponding rotation holes 8 .

[0031] The shell assembly 1 includes a shell 9 and an upper cover 10 that are connected to each other. An inner cavity 11 is provided in the shell 9. The impeller assembly 2 is rotatably provided on the inner cavity 11. The upper cover 10 covers the top opening of the inner cavity 11. The mounting hole 4 and the rotating hole 8 are respectively provided on the shell 9 and the upper cover 10. The upper and lower ends of the rotating shaft 3 extend into the corresponding mounting holes 4 respectively.

[0032] A sealing ring 16 is provided at the fitting position between the housing 9 and the upper cover 10 .

[0033] The impeller assembly 2 includes a first impeller 12 and a second impeller 13 arranged up and down. A accommodating chamber 15 is arranged in the impeller assembly 2, and a magnetic component 14 is arranged on the accommodating chamber 15. The first impeller 12, the second impeller 13 and the magnetic component 14 are respectively mounted on the rotating shaft 3, that is, the first impeller 12, the second impeller 13 and the magnetic component 14 are respectively fixed on the rotating shaft 3, the magnetic component 14 is a magnet, and the accommodating chamber 15 is arranged in the first impeller 12.

[0034] A water inlet pipe 17 and a water outlet pipe 18 are respectively provided on both sides of the shell 9 . The water inlet pipe 17 , the inner cavity 11 and the water outlet pipe 18 are connected in sequence. Water flows into the inner cavity 11 through the water inlet pipe 17 and then flows out through the water outlet pipe 18 .

[0035] A plurality of blades 20 are disposed on the outer circumference of the first impeller 12 and the second impeller 13 , and water flows through the blades 20 to drive the impeller assembly 2 to rotate.

[0036] A mounting groove 19 is provided on the side of the shell 9, and a sensor is provided in the mounting groove 19. The positions of the sensor and the magnetic part 14 correspond to each other. The sensor is a Hall sensor. When the water flow drives the impeller assembly 2 to rotate, the impeller assembly 2 drives the magnetic part 14 to rotate through the rotating shaft 3. When the magnetic part 14 rotates, the magnetic field changes periodically. The Hall sensor detects the change in the magnetic field, thereby detecting the water flow rate. The above structure is a prior art and will not be described in detail here.

[0037] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A flow meter, comprising a housing assembly (1), an impeller assembly (2) and a rotating shaft (3), wherein the impeller assembly (2) is sleeved on the rotating shaft (3), and the rotating shaft (3) is rotatably mounted on the housing assembly (1), characterized in that: The housing component (1) is provided with mounting holes (4) at both ends of the corresponding rotating shaft (3), and wear-resistant ball parts (5) are arranged in the mounting holes (4). The wear-resistant ball parts (5) and the two ends of the rotating shaft (3) are in contact with each other.

2. The flow meter according to claim 1, characterized in that: Matching surfaces (6) are respectively provided at both ends of the rotating shaft (3), and the wear-resistant ball part (5) and the matching surface (6) abut against each other.

3. The flow meter according to claim 1, characterized in that: The wear-resistant ball part (5) is interference-fitted with the hole wall of the mounting hole (4).

4. The flow meter according to claim 1, characterized in that: The wear-resistant ball part (5) is made of metal material or wear-resistant material.

5. The flow meter according to claim 1, characterized in that: A sealing member (7) is provided on the mounting hole (4), and the sealing member (7) is located outside the wear-resistant ball member (5).

6. The flow meter according to claim 1, characterized in that: The shape of the rotating shaft (3) is cylindrical, and the shape of the wear-resistant ball (5) is spherical.

7. The flow meter according to claim 1, characterized in that: Rotation holes (8) are respectively provided at both ends of the housing component (1), the rotation shaft (3) is inserted into the rotation hole (8), and both ends of the rotation shaft (3) are respectively rotationally matched with the corresponding rotation holes (8).

8. The flow meter according to claim 1, characterized in that: The housing assembly (1) comprises a housing (9) and an upper cover (10) which are connected to each other. An inner cavity (11) is provided in the housing (9). The impeller assembly (2) is rotatably disposed on the inner cavity (11). The upper cover (10) covers the top opening of the inner cavity (11). The mounting holes (4) are respectively provided on the housing (9) and the upper cover (10). Both ends of the rotating shaft (3) extend into the corresponding mounting holes (4).

9. The flow meter according to claim 8, characterized in that: The impeller assembly (2) comprises a first impeller (12) and a second impeller (13) which are arranged one above the other. A receiving chamber (15) is provided in the impeller assembly (2). A magnetic component (14) is provided on the receiving chamber (15). The first impeller (12), the second impeller (13) and the magnetic component (14) are respectively mounted on the rotating shaft (3).

10. The flow meter according to claim 9, characterized in that: A water inlet pipe (17) and a water outlet pipe (18) are respectively provided on both sides of the shell (9), and the water inlet pipe (17), the inner cavity (11) and the water outlet pipe (18) are sequentially connected.

Images