Non-return float flowmeter

Abstract

The utility model relates to a non-return float flowmeter which comprises an air inlet terminal, a main body block, an adjusting knob assembly, a pressing needle and an air outlet terminal, a through hole is formed in one end of the main body block, the air inlet terminal and the adjusting knob assembly are fixed to the two ends of the through hole respectively, and the air inlet flow of the air inlet terminal is adjusted through the adjusting knob assembly; the other end of the main body block extends inwards to be provided with an installation long hole, the bottom of the installation long hole is communicated with the through hole through a communication hole, a sealing ring and a needle-shaped guide rail are arranged in the installation long hole, the pressing needle is fixed to one end of the installation long hole, the air outlet terminal is fixed to the other end of the main body block, and the two ends of the needle-shaped guide rail are communicated with the communication hole and the air outlet terminal respectively. Balls are arranged in the needle-shaped guide rails, and gaps are reserved between the balls and the inner walls of the needle-shaped guide rails. According to the utility model, the effect of preventing gas backflow is realized, the structure is simple, and only two small parts, namely the sealing ring and the needle-shaped guide rail, are added, so that the cost is relatively low.

Description

Technical Field

[0001] The utility model belongs to the technical field of float flow meters, and particularly relates to a check float flow meter. Background Art

[0002] A float flow meter is a device that calculates the flow rate by measuring a rotating component installed in a straight pipeline and is a type of variable area flow meter; the structure of a rotor flow meter includes a conical tube that gradually expands from bottom to top and a float placed in the conical tube that can freely rotate up and down along the center line of the tube.

[0003] However, in existing float flow meters for measuring air flow, the air generally flows directly out from an outlet opened at one end of the conical tube, which is easily interfered by the external air pressure and causes cross-flow, affecting the accuracy of the measurement results. Therefore, a float flow meter with a check valve is needed to solve the above problems.

[0004] Chinese patent document CN214743378U discloses a float flow meter with a check valve. Although this flow meter also has a check function, a check valve assembly needs to be set at the air outlet terminal, resulting in a complex overall structure and increased cost. Summary of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a check float flow meter with a simple structure and low cost.

[0006] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0007] The check float flow meter includes an air inlet terminal, a main body block, an adjusting knob assembly, a pressure needle, and an air outlet terminal. One end of the main body block is provided with a through hole, and the air inlet terminal and the adjusting knob assembly are respectively fixed at both ends of the through hole, and the air inlet flow rate of the air inlet terminal is adjusted through the adjusting knob assembly; the other end of the main body block extends inwardly to form an installation long hole, the bottom of the installation long hole is communicated with the through hole through a communication hole, a sealing ring and a needle-shaped guide rail are arranged in the installation long hole, the pressure needle is fixed at one end of the installation long hole, and the needle-shaped guide rail presses the sealing ring against the bottom of the installation long hole. The air outlet terminal is fixed at the other end of the main body block and is located below the pressure needle. The two ends of the needle-shaped guide rail are respectively communicated with the communication hole and the air outlet terminal, and ball bearings are arranged in the needle-shaped guide rail, and there is a gap between the ball bearings and the inner wall of the needle-shaped guide rail.

[0008] As a preferred solution: the aperture of the communication hole is smaller than the aperture of the installation long hole, and a step surface is formed at the connection between the communication hole and the installation long hole, and the sealing ring is arranged on the step surface.

[0009] As a preferred solution: the installation long hole is vertically arranged with the through hole.

[0010] As a preferred solution: one end of the needle pressing member is provided with a ventilation groove, the side wall of the ventilation groove is provided with a through hole, the ventilation groove is communicated with the needle-shaped guide rail, and the through hole is communicated with the air outlet terminal.

[0011] As a preferred solution: a limiting rod for limiting the ball is further provided in the middle of the ventilation groove, and the length of the limiting rod is greater than the length of the ventilation groove.

[0012] As a preferred solution: the adjusting knob assembly includes a screw rod with an arcuate end surface, and one end of the screw rod extending into the air inlet through hole of the air inlet terminal adjusts the air inlet flow rate by adjusting the length of the screw rod extending into the air inlet through hole.

[0013] The utility model adds a sealing ring and a needle-shaped guide rail in the flow meter main body. When ventilating, the ball moves along the needle-shaped guide rail with the airflow. When not ventilating, the ball can fall under the action of its own gravity and press on the sealing ring, achieving the effect of preventing gas backflow. The structure of the utility model is simple, and only two small components, namely the sealing ring and the needle-shaped guide rail, are added, and the relative cost is low. Description of the Drawings

[0014] The specification drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation to this application.

[0015] Figure 1 is the overall structural schematic diagram of the utility model;

[0016] Figure 2 is the cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 and Figure 4 are the disassembled structural schematic diagrams of the utility model from two different angles.

[0018] The reference numerals are: 1, air inlet terminal; 2, main body; 20, communication hole; 21, installation long hole; 3, adjusting knob assembly; 4, sealing ring; 5, ball; 6, needle-shaped guide rail; 7, needle pressing member; 71, through hole; 8, air outlet terminal. Detailed Description of the Invention

[0019] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0020] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 thus should not be construed as a limitation to the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0023] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0026] As Figures 1 to 4 shown in the check float flowmeter, which includes an air inlet terminal 1, a main body block 2, an adjustment knob assembly 3, a pressure needle 7, and an air outlet terminal 8. One end of the main body block 2 is provided with a through hole, and the air inlet terminal 1 and the adjustment knob assembly 3 are respectively fixed at both ends of the through hole. The air inlet flow rate of the air inlet terminal 1 is adjusted through the adjustment knob assembly 3. The adjustment knob assembly 3 includes a screw rod with an arcuate end surface. One end of the screw rod extends into the air inlet through hole of the air inlet terminal 1, and the air inlet flow rate is adjusted by adjusting the length of the screw rod extending into the air inlet through hole.

[0027] The other end of the main body block 2 extends inwardly to form a mounting long hole 21, and the mounting long hole 21 is perpendicular to the through hole. The bottom of the mounting long hole 21 is communicated with the through hole through a communication hole 20. A sealing ring 4 and a needle-shaped guide rail 6 are arranged in the mounting long hole 21. The aperture of the communication hole 20 is smaller than that of the mounting long hole 21, and a stepped surface is formed at the connection between the communication hole 20 and the mounting long hole 21. The sealing ring 4 is arranged on the stepped surface.

[0028] The needle-shaped guide rail 6 is a hollow tubular shape. The inner diameter of the sealing ring is smaller than the inner diameter of the needle-shaped guide rail 6. A ball 5 is arranged in the needle-shaped guide rail 6, and a gap is left between the ball 5 and the inner wall of the needle-shaped guide rail 6.

[0029] The pressure needle 7 is fixed to one end of the mounting long hole 21, and the needle-shaped guide rail 6 presses the sealing ring 4 against the bottom of the mounting long hole 21. The air outlet terminal 8 is fixed to the other end of the main body block 2 and is located below the pressure needle 7. One end of the needle-shaped guide rail 6 is communicated with the communication hole 20. One end of the pressure needle 7 is provided with a ventilation groove, and the ventilation groove is communicated with the other end of the needle-shaped guide rail 6. A through hole 71 is arranged on the side wall of the ventilation groove, and the through hole 71 is communicated with the air outlet terminal 8. A limiting rod for limiting the ball 5 is also arranged in the middle of the ventilation groove, and the length of the limiting rod is greater than the length of the ventilation groove.

[0030] The present utility model adds a sealing ring and a needle-shaped guide rail in the flowmeter main body. When ventilated, the ball moves in the needle-shaped guide rail along with the airflow. When not ventilated, the ball can fall under the action of its own gravity and press on the sealing ring, achieving the effect of preventing gas backflow.

[0031] In addition, in traditional structures such as check valves or one-way valves, a spring is usually provided. When ventilated, it is necessary to overcome not only the gravity of the ball but also the elastic force of components such as check valves or one-way valves. This structure will cause problems such as inaccurate gas flow indication. However, in the structure of this application, when ventilated, only the gravity of the ball needs to be overcome, and the flow indication effect is more accurate.

[0032] In summary, the structure of the utility model is simple, and only two small components, namely the sealing ring and the needle-shaped guide rail, are added, with relatively low cost and accurate flow indication effect.

[0033] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. Check float flowmeter, characterized by: The invention comprises an air inlet terminal (1), a main body block (2), an adjusting knob assembly (3), a pressure pin (7) and an air outlet terminal (8), wherein one end of the main body block (2) is provided with a through hole, the air inlet terminal (1) and the adjusting knob assembly (3) are respectively fixed at the two ends of the through hole, and the air inlet flow of the air inlet terminal (1) is adjusted by the adjusting knob assembly (3); the other end of the main body block (2) is provided with an inwardly extending mounting long hole (21), the bottom of the mounting long hole (21) is connected to the through hole through a connecting hole (20), and the mounting long hole (21) is connected to the through hole through a connecting hole (20). ) is provided with a sealing ring (4) and a needle-type guide rail (6), the pressing pin (7) is fixed to one end of the mounting long hole (21), and the needle-type guide rail (6) presses the sealing ring (4) against the bottom of the mounting long hole (21), the air outlet terminal (8) is fixed to the other end of the main body block (2), and is located below the pressing pin (7), the two ends of the needle-type guide rail (6) are respectively connected to the connecting hole (20) and the air outlet terminal (8), a ball (5) is provided in the needle-type guide rail (6), and a gap is left between the ball (5) and the inner wall of the needle-type guide rail (6).

2. The non-return float flowmeter according to claim 1, characterized in that: The diameter of the connecting hole (20) is smaller than the diameter of the mounting long hole (21), a step surface is formed at the connection between the connecting hole (20) and the mounting long hole (21), and the sealing ring (4) is arranged on the step surface.

3. The non-return float flowmeter according to claim 1, characterized in that: The mounting long hole (21) is arranged perpendicular to the through hole.

4. The non-return float flowmeter according to claim 1, characterized in that: A vent groove is provided at one end of the pressure needle (7), a through hole (71) is provided on the side wall of the vent groove, the vent groove is communicated with the needle-shaped guide rail (6), and the through hole (71) is communicated with the air outlet terminal (8).

5. The non-return float flowmeter according to claim 4, characterized in that: A limiting rod for limiting the position of the ball (5) is also provided in the middle of the ventilation groove, and the length of the limiting rod is greater than the length of the ventilation groove.

6. The non-return float flowmeter according to claim 1, characterized in that: The adjusting knob assembly (3) comprises a screw having an arc-shaped end, wherein one end of the screw extends into the air inlet through hole of the air inlet terminal (1), and the air inlet flow rate is adjusted by adjusting the length of the screw extending into the air inlet through hole.

Images