A soap film flow meter

Abstract

This utility model discloses a soap film flow meter, including a base, a pair of measuring frames, a glass tube, a rubber dripper, and an outlet pipe. The bottom sidewall of the glass tube has independent liquid injection ports and air injection ports circumferentially arranged, both inclined upwards. A one-way valve is installed inside the air injection port. The liquid injection port consists of two threaded liquid injection tubes, liquid injection tube one and liquid injection tube two, integrally formed with the glass tube. A sealing ring and a hollow frame are installed inside the liquid injection tube two. A conical sealing block is tightly attached to the inclined sidewall of the inner ring of the sealing ring, and a spring is installed between the sealing block and the hollow frame. This utility model, by setting independent liquid injection ports and air injection ports, allows soap water and the gas to be measured to be injected through different interfaces. Liquid injection does not require disconnecting the gas path, shortening the single operation time and improving detection efficiency. Simultaneously, the one-way valve physically isolates the gas-liquid channels, preventing liquid backflow into the gas path.

Description

Technical Field

[0001] This utility model relates to the technical field of gas flow measurement equipment, and in particular to a soap film flow meter. Background Technology

[0002] A soap film flow meter is a commonly used calibration device for small flow rate testing instruments, suitable for detecting the flow rate of any gas or liquid. Its principle involves combining an internal microprocessor with a sensitive element to measure and calculate the start and end time of the soap film or liquid surface passing through a volume within a glass tube, ultimately calculating the flow rate and displaying it visually.

[0003] Existing soap film flow meters typically include a base with a microprocessor, two measuring frames with built-in infrared sensors, and a glass tube placed inside the measuring frame. However, the traditional glass tube shares a single interface between the soap water inlet and the gas inlet. During use, the gas path must be disconnected first, soap water must be dripped in through this interface, and then the gas supply hose must be reconnected. This operation has two major drawbacks: the gas tube needs to be disassembled / reinstalled each time liquid is injected, affecting detection efficiency; and residual liquid can easily enter the gas path system during injection, corroding precision components.

[0004] Therefore, we propose a soap film flow meter to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a soap film flow meter to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A soap film flow meter includes a base, a pair of measuring frames, a glass tube, a rubber dripper, and an air outlet. The bottom side wall of the glass tube is provided with independent liquid injection ports and air injection ports along the circumferential direction, and both the liquid injection ports and air injection ports are inclined upwards. A one-way valve is installed in the air injection port.

[0008] In a further embodiment, the injection port is composed of an injection tube 1 and an injection tube 2 that are threaded together. The injection tube 1 is integrally formed with the glass tube. The injection tube 2 has a sealing ring and a hollow frame installed inside. A conical sealing block is tightly attached to the inclined side wall of the inner ring of the sealing ring. A spring is installed between the sealing block and the hollow frame.

[0009] In a further embodiment, a straight rail is symmetrically fixed on the inner wall of the injection tube two, and the straight rail is parallel to the axis of the injection tube two. A slider is symmetrically installed on the side wall of the sealing block, and the slider is slidably connected to the straight rail.

[0010] In a further embodiment, the upper end face of the sealing ring adopts a bucket-shaped structure that is wider at the top and narrower at the bottom.

[0011] In a further embodiment, the gas injection port is composed of a gas injection tube 1 and a gas injection tube 2 that are threaded together. The gas injection tube 1 is integrally formed with the glass tube. The outer walls of the liquid injection tube 1 and the gas injection tube 1 are provided with protruding rings, and the screw joints of the liquid injection tube 1 and the gas injection tube 1 are all fitted with sealing rings.

[0012] In a further embodiment, the middle section of the second air injection tube gradually narrows towards both ends to form a double-headed conical structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features separate liquid and gas injection ports, allowing soapy water and the gas being tested to be injected through different interfaces. Liquid injection does not require disconnecting the gas path, shortening the single operation time and improving detection efficiency. At the same time, the one-way valve can physically isolate the gas and liquid channels, preventing liquid from flowing back into the gas path. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the left front view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the right front view structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-section of the injection port of this utility model;

[0018] Figure 4 This is a schematic diagram of the air injection port structure after being cut open.

[0019] In the diagram: 1. Base; 2. Measuring frame; 3. Glass tube; 4. Rubber dropper; 5. Air outlet; 6. Liquid injection port; 61. Liquid injection tube one; 62. Liquid injection tube two; 63. Sealing ring; 64. Sealing block; 65. Spring; 66. Hollow frame; 67. Slider; 68. Straight rail; 7. Air injection port; 71. Air injection tube one; 72. Air injection tube two; 8. One-way valve; 9. Raised ring; 10. Sealing ring. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2 A soap film flow meter includes a base 1, a microprocessor installed inside the base 1, integrating a timing module and a display module, and a pair of measuring frames 2 that are distributed vertically along the axial direction and fixed on the base 1 by a support rod. The measuring frames 2 are embedded with infrared sensors. A glass tube 3 is vertically installed between the pair of measuring frames 2. The bottom end of the glass tube 3 is connected to a rubber drip head 4 through a thin glass tube, and the top is provided with an air outlet pipe 5.

[0024] Please see Figure 1-3The bottom sidewall of the glass tube 3 is provided with independent and upwardly inclined liquid injection ports 6 and gas injection ports 7 along the circumferential direction. Specifically, the liquid injection port 6 is composed of a first liquid injection tube 61 and a second liquid injection tube 62. The first liquid injection tube 61 is made of glass and is integrally formed with the glass tube 3. The second liquid injection tube 62 is made of metal and is screwed to the end of the first liquid injection tube 61. In order to improve the sealing performance, a raised ring 9 is provided on the outer sidewall of the first liquid injection tube 61, and a sealing ring 10 is sleeved around the screw joint of the first liquid injection tube 61. When the second liquid injection tube 62 is tightened, the sealing ring 10 is pressed between the bottom end of the second liquid injection tube 62 and the raised ring 9. A sealing ring 63 and a hollow frame 66 are installed inside the second liquid injection tube 62. A conical shape is tightly attached to the inclined sidewall of the inner ring of the sealing ring 63. A sealing block 64 is fitted with a spring 65 between it and the hollow frame 66. After the syringe is connected to the injection tube 62, the syringe connector can be inserted into the injection tube 62 and press against the sealing block 64, causing the sealing block 64 to separate from the sealing ring 63, forming an annular gap, thereby opening the liquid channel. When no liquid is injected, the sealing block 64 automatically rebounds and seals, preventing air and liquid leakage. The upper end face of the sealing ring 63 adopts a funnel-shaped structure that is wider at the top and narrower at the bottom, which facilitates liquid flow. A straight rail 68 is symmetrically fixed on the inner wall of the injection tube 62, and the straight rail 68 is parallel to the axis of the injection tube 62. A slider 67 is symmetrically installed on the side wall of the sealing block 64, and the slider 67 is slidably connected to the straight rail 68 to prevent the sealing block 64 from deflecting.

[0025] Please see Figure 4 The air inlet 7 consists of an air inlet tube 1 71 and an air inlet tube 2 72. The air inlet tube 1 71 is made of glass and is integrally formed with the glass tube 3. The air inlet tube 2 72 is made of metal and is threaded to the end of the air inlet tube 1 71. A one-way valve 8 is installed inside the air inlet tube 2 72 to prevent liquid backflow. The middle section of the air inlet tube 2 72 gradually tapers towards both ends to form a double-headed conical structure, which facilitates the connection of an external gas output hose. The outer wall of the air inlet tube 1 71 is also provided with a raised ring 9, and a sealing ring 10 is also sleeved around the screw joint of the air inlet tube 1 71 to improve the sealing performance of the screw joint between the air inlet tube 1 71 and the air inlet tube 2 72.

[0026] Workflow: First, connect the syringe containing soapy water to the injection port 6. The syringe connector pushes open the sealing block 64, thereby opening the gas passage. Squeeze the syringe to inject soapy water into the injection port 6. The soapy water enters the bottom end of the glass tube 3 for storage. Then, remove the syringe. The sealing block 64 rebounds and seals under the action of the spring 65. Squeeze the rubber dropper 4 to generate a soap film. Then, put the gas output hose to be tested over the gas injection port 7. The gas is blown into the bottom end of the glass tube 3 through the one-way valve 8. The gas blows the soap film up along the glass tube 3. When it passes through the two measuring frames 2, it is detected by the infrared sensors in the measuring frames 2 respectively, and the start and end times of passing through the two infrared sensors are recorded.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A soap film flowmeter comprising a base (1), a pair of measuring stands (2), a glass tube (3), a rubber dropper (4) and an air outlet tube (5), characterized in that: The bottom sidewall of the glass tube (3) is provided with independent liquid injection port (6) and air injection port (7) along the circumferential direction, and both the liquid injection port (6) and the air injection port (7) are inclined upward. A one-way valve (8) is installed in the air injection port (7).

2. A soap-film flowmeter according to claim 1, characterized in that: The injection port (6) is composed of an injection tube one (61) and an injection tube two (62) that are threaded together. The injection tube one (61) is integrally formed with the glass tube (3). The injection tube two (62) is equipped with a sealing ring (63) and a hollow frame (66). A conical sealing block (64) is tightly attached to the inclined side wall of the inner ring of the sealing ring (63). A spring (65) is installed between the sealing block (64) and the hollow frame (66).

3. The soap film flow meter according to claim 2, characterized in that: The inner wall of the injection tube (62) is also symmetrically fixed with a straight rail (68), and the straight rail (68) is parallel to the axis of the injection tube (62). The side wall of the sealing block (64) is symmetrically installed with a slider (67), and the slider (67) is slidably connected to the straight rail (68).

4. A soap film flow meter according to claim 2, characterized in that: The upper end face of the sealing ring (63) adopts a bucket-shaped structure that is wider at the top and narrower at the bottom.

5. A soap film flow meter according to claim 2, characterized in that: The gas injection port (7) is composed of a gas injection tube one (71) and a gas injection tube two (72) that are threaded together. The gas injection tube one (71) is integrally formed with the glass tube (3). The outer walls of the liquid injection tube one (61) and the gas injection tube one (71) are provided with a protruding ring (9). The screw joint of the liquid injection tube one (61) and the gas injection tube one (71) are fitted with a sealing ring (10).

6. A soap film flow meter according to claim 5, characterized in that: The middle section of the second air inlet tube (72) gradually narrows towards both ends to form a double-headed conical structure.

Images