High-precision flow detection device

Abstract

The utility model discloses a high-precision flow detection device which comprises a fixing plate, a variable cross-section gas flow assembly is arranged on the fixing plate, and the variable cross-section gas flow assembly comprises a variable cross-section pipe arranged on the fixing plate; one end of the detection section is connected with an air pressure detection assembly; an air source input assembly is further arranged on the variable cross-section pipe and used for inputting moving power of the telescopic assembly; the utility model belongs to the technical field of coal mine gas detection, and particularly relates to a high-precision flow detection device. According to the high-precision flow detection device provided by the utility model, the pitot tube of which the internal section shape can be changed is designed, so that the gas flowing cross sectional area can be changed in the working process, the gas pressure is further changed, and the wind speed can be measured at a low flow speed.

Description

Technical Field

[0001] The utility model belongs to the technical field of core flow detection, and specifically refers to a high-precision flow detection device. Background Art

[0002] Rock interstitial flow measurement is a method of evaluating the flow properties of pore spaces in rocks. Rock interstitials are cracks, holes or microscopic pores in rocks. By measuring the flow of fluids (usually water or gas) in rock pores, we can understand the permeability and porosity of the rock and the flow behavior of groundwater or underground gas.

[0003] However, the following problems exist in the process of detecting the flow rate in the pores: due to the low flow velocity in the pores, the existing method of measuring the flow rate through the Pitot tube cannot change the pipe cross-section to ensure the measurement accuracy. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high-precision flow detection device. By designing a variable cross-section pipeline, the cross-sectional area can be adjusted by the variable cross-section, and then the cross-sectional size in the pipeline can be adjusted.

[0005] The technical solution adopted by the present invention is as follows: the present invention provides a high-precision flow detection device, including a fixed plate, on which a variable-section gas flow component is installed, and the variable-section gas flow component includes a variable-section tube installed on the fixed plate;

[0006] The variable cross-section tube comprises an input section, a flow section, a transition section, an air intake section and a detection section, wherein the air intake section is mounted on the fixed plate, and the input section, the flow section, the transition section, the air intake section and the detection section are connected in sequence in pairs;

[0007] One end of the detection section is connected to an air pressure detection component, the air pressure detection component comprises a first connecting air pipe connected to one end of the detection section, and one end of the first connecting air pipe is connected to a barometer;

[0008] A telescopic component is installed in the flow section, and the telescopic component includes a first air flow channel that runs through the flow section, a second air flow channel is connected between the first air flow channels at different positions in the flow section, a first fixed ring is provided on the inner side of the second air flow channel, a first moving body is movably provided in the first fixed ring, and a second moving body is connected to the other end of the first moving body; the input section is integrally connected to the flow section; an air source input component is also provided on the variable cross-section pipe for inputting moving power of the telescopic component.

[0009] Furthermore, the air source input component includes a second connecting pipe connected to the first air channel, the second connecting pipe is equipped with a first valve for opening and closing the flow channel in the second connecting pipe, and one end of the second connecting pipe is connected to a first air pump.

[0010] Furthermore, a first groove is provided between the first fixing ring and the first moving body, first protrusions are installed at both ends of the first moving body, and the first protrusions are integrally connected to the first moving body.

[0011] Furthermore, the first connecting air pipe is made of rubber material, and a fastening sleeve is installed between the first connecting air pipe and the detection section.

[0012] Furthermore, a transition section and a detection section are respectively connected to both ends of the air intake section, and a first fastening bolt is provided between the air intake section and the detection section for fastening the connection between the air intake section and the detection section.

[0013] Furthermore, a transition bend is connected between the air intake section and the transition section, a second fixing ring is installed in the transition bend, a third air flow channel is provided between the second fixing ring and the transition bend, and a fourth air flow channel is provided to connect the third air flow channels at different positions in the transition bend.

[0014] Furthermore, a third fixing ring is installed in the air intake section, a fifth air flow channel is provided between the third fixing ring and the transition bend, and a sixth air flow channel is provided to connect the fifth air flow channels at different positions in the transition bend.

[0015] Furthermore, the inner wall of the detection section is connected to the third fixing ring, the third fixing ring is connected to the second fixing ring, and the second fixing ring is connected to the first fixing ring.

[0016] Further, the fifth air flow channel is connected to the third air flow channel, and the third air flow channel is connected to the first air flow channel.

[0017] Furthermore, a second air pipe is connected between the second connecting pipe and the first air pump.

[0018] The beneficial effects achieved by the above structure are as follows:

[0019] The present invention provides a high-precision flow detection device, which can change the gas flow cross-sectional area and the gas pressure during operation by designing a pitot tube with a changeable internal cross-sectional shape, thereby ensuring that the wind speed can be measured at a low flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A schematic diagram of the main structure of a high-precision flow detection device provided by this utility model;

[0021] Figure 2 Schematic diagram of the variable cross-section pipe connection structure provided for this utility;

[0022] Figure 3 A schematic diagram of the internal structure of the flow section provided for this utility;

[0023] Figure 4 A schematic diagram of the internal structure of the transition elbow provided for this utility;

[0024] Figure 5 A schematic diagram of the internal structure of the air intake section provided for this utility;

[0025] Figure 6 A schematic diagram of the internal structure of the first groove provided by the present invention;

[0026] Figure 7 A schematic diagram of the connection structure of the air pressure detection component provided for this utility;

[0027] Figure 8 Schematic diagram of the internal structure of the detection section provided for this utility.

[0028] Among them, 1. fixed plate, 2. variable cross-section gas flow component, 201. input section, 202. flow section, 2021. first air flow channel, 2022. second air flow channel, 2023. first fixed ring, 2024. first moving body, 2025. second moving body, 2026. first groove, 2027. first protrusion, 203. transition section, 2031. transition elbow, 2032. second fixed ring, 2033. third air flow channel, 2034. fourth air flow channel, 204. air intake section, 2041. third fixed ring, 2042. fifth air flow channel, 2043. sixth air flow channel, 205. detection section, 3. air pressure detection component, 303. fastening sleeve, 4. air source input component, 401. second connecting pipe, 402. first valve, 403. first air pump.

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. Specific embodiment:

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the present invention provides a high-precision flow detection device, including a fixed plate 1, on which a variable-section gas flow component 2 is installed, and the variable-section gas flow component 2 includes a variable-section pipe installed on the fixed plate 1; the variable-section pipe includes an input section 201, a flow section 202, a transition section 203, an air intake section 204 and a detection section 205, and the air intake section 204 is installed on the fixed plate 1, and the input section 201, the flow section 202, the transition section 203, the air intake section 204 and the detection section 205 are connected in pairs in sequence; one end of the detection section 205 is connected to an air pressure detection component 3, and the air pressure detection component 3 includes a first connecting air pipe connected to one end of the detection section 205, A barometer is connected to one end of the first connecting air pipe; a telescopic component is installed in the flow section 202, and the telescopic component includes a first air flow channel 2021 which runs through the flow section 202, and a second air flow channel 2022 is connected between the first air flow channels 2021 at different positions in the flow section 202, a first fixed ring 2023 is provided on the inner side of the second air flow channel 2022, a first movable body 2024 is movably provided in the first fixed ring 2023, and a second movable body 2025 is connected to the other end of the first movable body 2024; the input section 201 is integrally connected to the flow section 202; an air source input component 4 is also provided on the variable cross-section pipe for inputting moving power of the telescopic component.

[0034] like Figure 1 , Figure 2 and Figure 6 As shown, the present invention provides a high-precision flow detection device, wherein the air source input component 4 includes a second connecting pipe 401 connected to the first air channel 2021, and the second connecting pipe 401 is provided with a first valve 402 for opening and closing the flow channel in the second connecting pipe 401, and one end of the second connecting pipe 401 is connected to a first air pump 403.

[0035] like Figure 3-Figure 5 As shown, the present invention provides a high-precision flow detection device, wherein a first groove 2026 is provided between the first fixing ring 2023 and the first moving body 2024, first protrusions 2027 are installed at both ends of the first moving body 2024, and the first protrusions 2027 are integrally connected to the first moving body 2024.

[0036] like Figure 7 and Figure 8 As shown, the present invention provides a high-precision flow detection device, wherein the first connecting air pipe is made of rubber material, and a fastening sleeve 303 is installed between the first connecting air pipe and the detection section 205.

[0037] like Figure 2 As shown, the present invention provides a high-precision flow detection device, wherein the two ends of the air intake section 204 are respectively connected with a transition section 203 and a detection section 205, and a first fastening bolt is provided between the air intake section 204 and the detection section 205 for fastening the fastening connection between the air intake section 204 and the detection section 205.

[0038] like Figure 2 , Figure 4 and Figure 5 As shown, the present invention provides a high-precision flow detection device, wherein a transition bend 2031 is connected between the air intake section 204 and the transition section 203, a second fixing ring 2032 is installed in the transition bend 2031, a third air flow channel 2033 is provided between the second fixing ring 2032 and the transition bend 2031, and a fourth air flow channel 2034 is provided to connect the third air flow channels 2033 at different positions in the transition bend 2031.

[0039] like Figure 2 and Figure 5 As shown, the present invention provides a high-precision flow detection device, wherein a third fixing ring 2041 is installed in the air intake section 204, a fifth air flow channel 2042 is provided between the third fixing ring 2041 and the transition bend 2031, and a sixth air flow channel 2043 is provided to connect the fifth air flow channels 2042 at different positions in the transition bend 2031.

[0040] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8As shown, the present invention provides a high-precision flow detection device, the inner wall of the detection section 205 is connected to the third fixing ring 2041, the third fixing ring 2041 is connected to the second fixing ring 2032, the second fixing ring 2032 is connected to the first fixing ring 2023, the fifth air flow channel 2042 is connected to the third air flow channel 2033, the third air flow channel 2033 is connected to the first air flow channel 2021, and a second air pipe is connected between the second connecting pipe 401 and the first air pump 403.

[0041] When used specifically:

[0042] The variable cross-section gas flow component 2 is placed into the gap, and the gas enters the flow section 202 and the transition section 203 through the input section 201, then enters the air intake section 204, and then enters the detection section 204, and is finally detected by the air pressure detection component 3.

[0043] At the same time, the specific working process of the variable-section gas flow component 2 is: the gas is input into the fifth air flow channel 2042 through the first air pump 403, and then the gas reaches the fourth air flow channel 2034 through the sixth air flow channel 2043, and then reaches the third air flow channel 2033, and then reaches the first air flow channel 2021, the gas pushes the first movable body 2024, and then pushes the second movable body 2025 to move, thereby realizing the variable cross-section of the flow section 202 and the input section 202.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0046] The above describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design a structure and implementation method similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A high-precision flow detection device, comprising a fixed plate, characterized in that: The fixed plate is provided with a variable cross-section gas flow component, and the variable cross-section gas flow component comprises a variable cross-section pipe installed on the fixed plate; The variable cross-section tube comprises an input section, a flow section, a transition section, an air intake section and a detection section, wherein the air intake section is mounted on the fixed plate, and the input section, the flow section, the transition section, the air intake section and the detection section are connected in sequence in pairs; One end of the detection section is connected to an air pressure detection component, the air pressure detection component comprises a first connecting air pipe connected to one end of the detection section, and one end of the first connecting air pipe is connected to a barometer; A telescopic assembly is installed in the flow section, the telescopic assembly includes a first airflow passage that penetrates the flow section, a second airflow passage is connected between the first airflow passages at different positions in the flow section, a first fixed ring is provided inside the second airflow passage, a first moving body is movably provided in the first fixed ring, and a second moving body is connected to the other end of the first moving body; The input section is integrally connected to the flow section; The variable cross-section tube is also provided with an air source input component for inputting movement power of the telescopic component.

2. A high-precision flow detection device according to claim 1, characterized in that: The air source input component includes a second connecting pipe connected to the first air channel, the second connecting pipe is equipped with a first valve for opening and closing the flow channel in the second connecting pipe, and one end of the second connecting pipe is connected to a first air pump.

3. A high-precision flow detection device according to claim 2, characterized in that: A first groove is arranged between the first fixing ring and the first moving body. First protrusions are arranged at both ends of the first moving body. The first protrusions are integrally connected with the first moving body.

4. A high-precision flow detection device according to claim 3, characterized in that: The first connecting air pipe is made of rubber material, and a fastening sleeve is installed between the first connecting air pipe and the detection section.

5. A high-precision flow detection device according to claim 4, characterized in that: A transition section and a detection section are respectively connected at both ends of the air intake section, and a first fastening bolt is provided between the air intake section and the detection section for fastening the connection between the air intake section and the detection section.

6. A high-precision flow detection device according to claim 5, characterized in that: A transition bend is connected between the air intake section and the transition section, a second fixing ring is installed in the transition bend, a third air flow channel is provided between the second fixing ring and the transition bend, and a fourth air flow channel is provided between the third air flow channels at different positions in the transition bend.

7. A high-precision flow detection device according to claim 6, characterized in that: A third fixing ring is installed in the air intake section, a fifth air flow channel is provided between the third fixing ring and the transition bend, and a sixth air flow channel is provided between the fifth air flow channels at different positions in the transition bend.

8. A high-precision flow detection device according to claim 7, characterized in that: The inner wall of the detection section is connected to the third fixing ring, the third fixing ring is connected to the second fixing ring, and the second fixing ring is connected to the first fixing ring.

9. A high-precision flow detection device according to claim 8, characterized in that: The fifth air flow channel is communicated with the third air flow channel, and the third air flow channel is communicated with the first air flow channel.

10. A high-precision flow detection device according to claim 9, characterized in that: A second air pipe is connected between the second connecting pipe and the first air pump.

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