Floater of rotor flow meter

Abstract

The utility model provides a floater of a rotor flow meter, and relates to the technical field of rotor flow meters. The flow limiting device comprises a floating rod, two flow limiting supports are arranged on the two sides of the floating rod respectively, a first auxiliary ring is arranged on the floating rod between the two flow limiting supports, a second auxiliary ring is arranged on the floating rod on the inner sides of the flow limiting supports, the contour of each flow limiting support is in a circular truncated cone shape, and the end, with the large outer diameter, of each flow limiting support faces the direction away from the first auxiliary ring. According to the utility model, the phenomenon of jamming of the rotor flow meter is avoided or reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor flowmeters, in particular to a float of a rotor flowmeter. Background Art

[0002] The rotor flowmeter is a flowmeter commonly used in industry. It has the advantages of simple structure, small pressure loss, easy maintenance, long life and low price. Based on these advantages, in the polysilicon industry, the rotor flowmeter is mainly used in pressurized hydrogen and nitrogen purge pipelines.

[0003] In the existing technology, there is a backflow of silicon powder in the pressurized hydrogen purge pipeline. The rotor flowmeter is not suitable for fluids containing solids, which causes the rotor flowmeter to jam, affecting the measurement of normal flow and making it impossible for operators to accurately judge the flow rate of push hydrogen and incoming nitrogen, seriously affecting production. Utility Model Content

[0004] The utility model aims to develop a float for a rotor flowmeter which can avoid or reduce the jamming phenomenon of the rotor flowmeter.

[0005] The utility model is achieved through the following technical solutions:

[0006] A float of a rotor flowmeter, comprising:

[0007] Floating rod;

[0008] Two current limiting brackets are respectively arranged on both sides of the floating rod;

[0009] Among them, a first auxiliary ring is provided on the floating rod between the two current limiting brackets, and a second auxiliary ring is provided on the floating rod inside the current limiting bracket. The outline of the current limiting bracket is frustum-shaped and the end with a larger outer diameter faces away from the first auxiliary ring.

[0010] Optionally, the float rod is arranged vertically, and the float rod includes a bottom rod, a middle rod and a top rod coaxially connected in sequence from bottom to top. The outer diameter of the middle rod is larger than the bottom rod and the top rod, and the two current limiting brackets are respectively connected to the bottom rod and the top rod.

[0011] Optionally, the first auxiliary ring is arranged on the middle rod near the top rod, the cross-section of the first auxiliary ring is circular and is arranged axially around the middle rod, the upper part of the first auxiliary ring is cylindrical and coaxial with the middle rod, and the lower part of the first auxiliary ring is conical and coaxial with the middle rod and with a gradually decreasing diameter.

[0012] Optionally, the free ends of the bottom rod and the top rod are both conical, and the second auxiliary ring is provided on the bottom rod or the top rod near the free end.

[0013] Optionally, the cross-section of the second auxiliary ring is circular and is arranged axially around the top rod or the bottom rod, the upper part of the second auxiliary ring is cylindrical and coaxial with the top rod or the bottom rod, and the lower part of the second auxiliary ring is conical and coaxial with the top rod or the bottom rod and with a gradually decreasing diameter.

[0014] Optionally, the current limiting bracket includes a large ring and a small ring in a coaxial state, a plurality of support plates are connected between the large ring and the small ring, the inner diameter of the small ring is adapted to the outer diameter of the top rod or the bottom rod, and the small ring is sleeved on the end portion where the corresponding top rod or the bottom rod is connected to the middle rod.

[0015] Optionally, the support plate body is arranged along the radial direction of the small ring and the large ring, the outer side wall of the support plate is a corresponding inclined surface, and multiple support plates are arranged in a circular trajectory around the axial direction of the small ring and the large ring at equal intervals.

[0016] Optionally, a filter assembly is provided at the bottom of the flow limiting bracket on the bottom rod, and the filter assembly includes a filter cover arranged on the inner side of the large ring, the filter cover is conical, and the filter cover is coaxially arranged in the large ring with the cone facing downward. The inner wall of the large ring is connected to a circular connecting ring, and the edge of the filter cover is connected to the top edge of the connecting ring.

[0017] Optionally, a gathering ring is provided at the bottom edge of the connecting ring, and the gathering ring is provided at the lower part of the filter cover and located on the inner side of the connecting ring. The gathering ring includes a first inclined portion, a vertical portion, and a second inclined portion connected in sequence from bottom to top. The inner walls of the first inclined portion and the second inclined portion are both inclined surfaces. The first inclined portion and the second inclined portion are both in the shape of a frustum and their ends with smaller outer diameters are connected to the vertical portion, and the end with larger outer diameter of the first inclined portion is connected to the bottom edge of the connecting ring.

[0018] Optionally, a stabilizing frame is connected to the inner side of the filter cover, and the stabilizing frame is cross-shaped. The stabilizing frame includes four stabilizing plates, one end of which is connected to the inner wall of the filter cover, and the other end of the stabilizing plate is connected to the ends of the remaining three stabilizing plates at the axis of the large ring.

[0019] The beneficial effects of the utility model are:

[0020] The utility model is mainly used for measuring hydrogen flow in a polysilicon pusher hydrogen pipeline. The pusher hydrogen pipeline uses hydrogen to push silicon powder into a reactor. A current limiting bracket replaces the traditional rotor gas damping, and a first auxiliary and a second auxiliary ring are provided to make the float have good aerodynamics and prevent silicon powder from getting stuck on the float and causing rotor jam. The provided filter assembly can filter impurities such as welding slag with large particle size and silicon powder agglomerates. The impurities filtered on the filter cover are blown to the aggregate ring inside the connecting ring under the airflow, so that the filter cover maintains its filtering performance. The impurities filtered out in the aggregate ring can be cleaned regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is the structural diagram of the utility model;

[0023] Figure 2 This is a structural diagram of the utility model from another perspective;

[0024] Figure 3 This is a structural diagram of the filtering component.

[0025] Figure numerals: 1. Floating rod; 11. Bottom rod; 12. Middle rod; 13. Top rod; 2. First auxiliary ring; 3. Second auxiliary ring; 4. Current limiting bracket; 41. Small ring; 42. Large ring; 43. Support plate; 5. Filter assembly; 51. Filter cover; 52. Connecting ring; 53. First inclined portion; 54. Vertical portion; 55. Second inclined portion; 56. Stabilizing frame. DETAILED DESCRIPTION

[0026] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figures 1-3 As shown, the utility model discloses a float of a rotor flowmeter, comprising a float rod 1, with both sides of the float rod 1 being connected to flow limiting brackets 4 respectively.

[0031] The floating rod 1 is arranged vertically, and includes a bottom rod 11, an intermediate rod 12 and a top rod 13 which are coaxially connected in sequence from bottom to top. The outer diameter of the intermediate rod 12 is larger than that of the bottom rod 11 and the top rod 13. The two current limiting brackets 4 are connected to the bottom rod 11 and the top rod 13 respectively.

[0032] A first auxiliary ring 2 is provided on the middle rod 12 near the top rod 13. The cross-section of the first auxiliary ring 2 is circular and is arranged axially around the middle rod 12. The upper part of the first auxiliary ring 2 is cylindrical and coaxial with the middle rod 12, and the lower part is conical and coaxial with the middle rod 12 and with a gradually decreasing diameter.

[0033] The free ends of the bottom rod 11 and the top rod 13 are both conical, and a second auxiliary ring 3 is provided near the free end of the bottom rod 11 and the top rod 13. The cross-section of the second auxiliary ring 3 is circular and is arranged axially around the top rod 13 or the bottom rod 11. The upper part of the second auxiliary ring 3 is cylindrical and coaxial with the top rod 13 or the bottom rod 11, and the lower part is conical and coaxial with the top rod 13 or the bottom rod 11 and has a gradually decreasing diameter.

[0034] The current limiting bracket 4 has a truncated cone-shaped profile and is coaxially connected to the float rod 1. The current limiting bracket 4 includes a small ring 41 and a large ring 42 in a coaxial state. The inner and outer diameters of the small ring 41 are both smaller than those of the large ring 42. The inner diameter of the small ring 41 matches the outer diameters of the bottom rod 11 and the top rod 13. Three support plates 43 are provided between the small ring 41 and the large ring 42. The three support plates 43 are arranged at equal intervals in a circular trajectory around the axial direction of the small ring 41 and the large ring 42. The support plates 43 are arranged perpendicular to the small ring 41 and the large ring 42, and the support plates 43 are arranged along the radial direction of the small ring 41 and the large ring 42. Since the current limiting bracket 4 has a truncated cone-shaped profile, the outer wall of the support plate 43 is a corresponding inclined surface. When the current limiting bracket 4 is connected to the top rod 13 or the bottom rod 11, the small ring 41 of the current limiting bracket 4 is sleeved on the end where the corresponding top rod 13 or the bottom rod 11 is connected to the middle rod 12, and the large ring 42 of the current limiting bracket 4 is located on the side away from the middle rod 12.

[0035] A filter assembly 5 is further provided at the bottom of the current limiting bracket 4 on the bottom rod 11 , and the filter assembly 5 filters impurities such as welding slag with large particle size and silicon powder agglomerates.

[0036] The filter assembly 5 includes a conical filter housing 51, which is positioned inside the large ring 42 with the conical portion facing downward. The housing 51 and the large ring 42 are coaxial and form a filter mesh structure with several apertures. A circular connecting ring 52 is connected to the inner wall of the large ring 42. The edge of the filter housing 51 is connected to the top edge of the connecting ring 52. A collection ring is located at the bottom edge of the connecting ring 52, located below the filter housing 51 and inside the connecting ring 52. The gathering ring includes a first inclined portion 53, a vertical portion 54, and a second inclined portion 55 connected in sequence from bottom to top. The inner walls of the first inclined portion 53 and the second inclined portion 55 are both inclined surfaces. The first inclined portion 53 and the second inclined portion 55 are both in the shape of a truncated cone side surface and their ends with smaller outer diameters are connected to the vertical portion 54. The inner wall of the vertical portion 54 is vertical. The end with larger outer diameter of the first inclined portion 53 is connected to the bottom edge of the connecting ring 52, the bottom edge of the vertical portion 54 is connected to the end with smaller outer diameter of the first inclined portion 53, and the end with smaller outer diameter of the second inclined portion 55 is connected to the top edge of the vertical portion 54.

[0037] A stabilizing frame 56 is connected to the inside of the filter housing 51 to enhance the structural stability of the filter housing 51. The stabilizing frame 56 is cross-shaped and includes four stabilizing plates. The stabilizing plates are arranged vertically to reduce the wind impact area and have strong anti-bending properties. One end of the stabilizing plate is connected to the inner wall of the filter housing 51, and the other end is connected to the ends of the other three stabilizing plates at the axis of the large ring 42.

[0038] The utility model is mainly used in measuring hydrogen flow in a polysilicon pusher hydrogen pipeline. The pusher hydrogen pipeline uses hydrogen to push silicon powder into a reactor. A current limiting bracket 4 replaces the traditional rotor gas damping, and a first auxiliary and a second auxiliary ring 3 are provided to make the float have good aerodynamics and prevent silicon powder from getting stuck on the float and causing rotor jam. The provided filter assembly 5 can filter impurities such as welding slag with large particle size and silicon powder agglomerates. The impurities filtered on the filter cover 51 are blown to the aggregate ring inside the connecting ring 52 under the airflow, so that the filter cover 51 maintains its filtering performance, and the impurities filtered out in the aggregate ring can be cleaned regularly.

[0039] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A float of a rotor flowmeter, characterized in that: include: Floating rod; Two current limiting brackets are respectively arranged on both sides of the floating rod; Among them, a first auxiliary ring is provided on the floating rod between the two current limiting brackets, and a second auxiliary ring is provided on the floating rod inside the current limiting bracket. The outline of the current limiting bracket is frustum-shaped and the end with a larger outer diameter faces away from the first auxiliary ring.

2. The float of the rotor flowmeter according to claim 1, characterized in that: The floating rod is arranged vertically, and comprises a bottom rod, a middle rod and a top rod which are coaxially connected in sequence from bottom to top. The outer diameter of the middle rod is larger than that of the bottom rod and the top rod, and the two current limiting brackets are respectively connected to the bottom rod and the top rod.

3. The float of the rotor flowmeter according to claim 2, characterized in that: The first auxiliary ring is arranged on the middle rod near the top rod. The cross-section of the first auxiliary ring is circular and is arranged axially around the middle rod. The upper part of the first auxiliary ring is cylindrical and coaxial with the middle rod, and the lower part of the first auxiliary ring is conical and coaxial with the middle rod and with a gradually decreasing diameter.

4. The float of the rotor flowmeter according to claim 2, characterized in that: The free ends of the bottom rod and the top rod are both conical, and the second auxiliary ring is arranged on the bottom rod or the top rod near the free end.

5. The float of the rotor flowmeter according to claim 4, characterized in that: The cross-section of the second auxiliary ring is circular and is arranged axially around the top rod or the bottom rod. The upper part of the second auxiliary ring is cylindrical and coaxial with the top rod or the bottom rod, and the lower part of the second auxiliary ring is conical and coaxial with the top rod or the bottom rod and with a gradually decreasing diameter.

6. The float of the rotor flowmeter according to claim 2, characterized in that: The current limiting bracket includes a large ring and a small ring in a coaxial state, and a plurality of support plates are connected between the large ring and the small ring. The inner diameter of the small ring is adapted to the outer diameter of the top rod or the bottom rod, and the small ring is sleeved on the end portion where the corresponding top rod or the bottom rod is connected to the middle rod.

7. The float of the rotor flowmeter according to claim 6, characterized in that The support plate body is arranged along the radial direction of the small ring and the large ring, the outer side wall of the support plate is a corresponding inclined surface, and multiple support plates are arranged in a circular trajectory around the axial direction of the small ring and the large ring at equal intervals.

8. The float of the rotor flowmeter according to claim 6, characterized in that: A filter assembly is provided at the bottom of the flow limiting bracket on the bottom rod, and the filter assembly includes a filter cover arranged on the inner side of the large ring. The filter cover is conical in shape. The filter cover is coaxially arranged in the large ring with the cone facing downward. The inner wall of the large ring is connected to a circular connecting ring, and the edge of the filter cover is connected to the top edge of the connecting ring.

9. The float of the rotor flowmeter according to claim 8, characterized in that: A gathering ring is provided at the bottom edge of the connecting ring. The gathering ring is provided at the lower part of the filter cover and located on the inner side of the connecting ring. The gathering ring includes a first inclined portion, a vertical portion, and a second inclined portion connected in sequence from bottom to top. The inner walls of the first inclined portion and the second inclined portion are both inclined surfaces. The first inclined portion and the second inclined portion are both in the shape of a frustum and their ends with smaller outer diameters are connected to the vertical portion. The end with larger outer diameter of the first inclined portion is connected to the bottom edge of the connecting ring.

10. The float of the rotor flowmeter according to claim 9, characterized in that: A stabilizing frame is connected to the inner side of the filter cover. The stabilizing frame is cross-shaped and includes four stabilizing plates. One end of the stabilizing plate is connected to the inner wall of the filter cover, and the other end of the stabilizing plate is connected to the ends of the remaining three stabilizing plates at the axis of the large ring.

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